101-ServiceManual.pdf

Service Manual

Model 101R/NRPatient MonitorR-wave Trigger

2409-0

0-2

0

Copyright © 1999 by Ivy Biomedical Systems, Inc., Branford, Connecticut. All rights reserved. No part of this manual may be reproduced without the permission of Ivy Biomedical Systems, Inc.

101R/NR0999 2409-00-20 REV 00

Table of Contents

Table of Contents WARRANTY .......................................................................................................................................................iv INTRODUCTION ................................................................................................................................................1 SAFETY ................................................................................................................................................................2 Electrical................................................................................................................................................................2 Explosion ...............................................................................................................................................................2 Patient Connections..............................................................................................................................................2 Pacemakers ...........................................................................................................................................................2 Electrosurgery.......................................................................................................................................................3 Defibrillation Protection ......................................................................................................................................3 EMC.......................................................................................................................................................................3 Description of Labels............................................................................................................................................3 MONITOR DESCRIPTION ...............................................................................................................................4 Specifications.........................................................................................................................................................4 Control and Indicatiors........................................................................................................................................7

Basic Keys................................................................................................................................................7 Programmable Keys .................................................................................................................................8 Menu Structure.........................................................................................................................................9 Display ...................................................................................................................................................10 Rear Panel ..............................................................................................................................................10

MONITOR SETUP ............................................................................................................................................12 Change Mains Voltage .......................................................................................................................................12 TRIGGER OUTPUT..........................................................................................................................................13 The Trigger Pulse ...............................................................................................................................................13 Trigger-Spot Display ..........................................................................................................................................13 ECG MONITORING.........................................................................................................................................14 Safety Considerations.........................................................................................................................................14 Patient Connections............................................................................................................................................15 ECG Waveform Amplitude (Size).....................................................................................................................15 Lead Selection .....................................................................................................................................................16 ECG Filter...........................................................................................................................................................16 Alarm Limits.......................................................................................................................................................17 RECORDER OPERATION ..............................................................................................................................18 Changing Paper ..................................................................................................................................................18 Recorder Menus..................................................................................................................................................19 Recorder Modes..................................................................................................................................................20 ALARM MESSAGES ........................................................................................................................................22

Model 101R/NR Service Manual i

Table of Contents

MONITOR TESTING .......................................................................................................................................23 CLEANING ........................................................................................................................................................24 Monitor................................................................................................................................................................24 Patient Cables .....................................................................................................................................................24 ACCESSORIES..................................................................................................................................................25 Disposal................................................................................................................................................................25 THEORY OF OPERATION .............................................................................................................................26 General ................................................................................................................................................................26 High Voltage Power Supply and Video Amplifier...........................................................................................26 Purpose of the High Voltage Power Supply...........................................................................................26 CRT Theory ...........................................................................................................................................26 Raster and Stroke Written Displays .......................................................................................................26 Timer Circuit ..........................................................................................................................................27 High Voltage Module.............................................................................................................................27 Feedback Amplifier................................................................................................................................27 Adjustment Circuit .................................................................................................................................28 Cathode Generation Circuit....................................................................................................................28 Low Voltage Power Supplies .............................................................................................................................29 DC Voltages ...........................................................................................................................................29 Isolated DC Voltages .............................................................................................................................29 ECG Input...........................................................................................................................................................29 Isolated Amplifiers.................................................................................................................................29 Lead Off Sensor .....................................................................................................................................29 Shield Drive ...........................................................................................................................................29 Lead Selection........................................................................................................................................29 Test Signal Generation ...........................................................................................................................30 ECG Waveform ..................................................................................................................................................30 ECF Filter...............................................................................................................................................30 X1000 Output.........................................................................................................................................30 ECG Gain ...............................................................................................................................................30 A/D Converter ........................................................................................................................................30 Cardiotach...........................................................................................................................................................31 Peak Detector .........................................................................................................................................31 Rate Computation...................................................................................................................................32 Alarm Generation...................................................................................................................................32 CRT Signals ........................................................................................................................................................32 Vertical Deflection .................................................................................................................................32 Horizontal Deflection.............................................................................................................................32 Horizontal Correction.............................................................................................................................32 Unblanking.............................................................................................................................................33 Audio Circuits.....................................................................................................................................................33 ECG Audio.............................................................................................................................................33 Alert Audio.............................................................................................................................................33 Digital Circuitry..................................................................................................................................................34

ii Model 101R/NR Service Manual

Table of Contents

TESTING AND TROUBLESHOOTING.........................................................................................................35 ECT Test .............................................................................................................................................................35 Equipment Required...............................................................................................................................35 Initial Settings for the Test .....................................................................................................................35 ECT Test Procedure ...............................................................................................................................35 Troubleshooting..................................................................................................................................................37 General Checks ......................................................................................................................................37 CRT Display...........................................................................................................................................37 Mother Board .........................................................................................................................................37 Troubleshooting Table ...........................................................................................................................38 Block Diagram ....................................................................................................................................................39 Voltage Measurements.......................................................................................................................................40 Key Signals ..........................................................................................................................................................41 Adjustment Procedure .......................................................................................................................................43 Equipment Required...............................................................................................................................43 ECG Signal.............................................................................................................................................43 50/60 Hz Notch Filter.............................................................................................................................43 Peak Detector .........................................................................................................................................43 CRT Display...........................................................................................................................................44 ASSEMBLY AND DISASSEMBLY.................................................................................................................46 Removing Cover .................................................................................................................................................46 Removing the High Voltage Power Supply ......................................................................................................46 Removing the Yoke.............................................................................................................................................47 Removing the CRT.............................................................................................................................................47 Replacing the Main Power LED........................................................................................................................47 Removing the Recorder Assembly ....................................................................................................................47 Removing the Mother Board.............................................................................................................................48 Replacing the Touch Panel ................................................................................................................................48 PURCHASING INFORMATION.....................................................................................................................49 Part List...............................................................................................................................................................49 Terms and Conditions........................................................................................................................................49 BOARD LAYOUT DIAGRAMS .......................................................................................................................A SCHEMATICS DIAGRAMS ............................................................................................................................. B

Model 101R/NR Service Manual iii

WARRANTY

WARRANTY All products warranted to be free from defects in material and workmanship and to operate within published specifications, under normal use, for a period of two years from date of original shipment. If an examination discloses such products or component parts to have been defective, then our obligation is limited to repair or replacement (at our option). Fuses and batteries are not covered under this warranty. During the first year of service, there is no charge for parts or labor. In the second year of service, the customer is charged for labor only.

iv Model 101R/NR Service Manual

INTRODUCTION

INTRODUCTION This manual is to provide information on the correct use of the Model 101R/NR monitor. It is up to the user to ensure that any applicable regulations respecting the installation and operation of the monitor are observed. Manufacturer's Responsibility The manufacturer of this equipment is responsible for the effects on safety, reliability, and performance of the equipment only if: • assembly operations, extensions, re-adjustments, or repairs are carried out by persons authorized by the

manufacturer • the electrical installation complies with all applicable regulations • the equipment is used in accordance with the instructions in this manual. Incorrect operation or failure of the user to maintain the monitor in accordance with proper maintenance procedures relieves the manufacturer or his agent from all responsibility for consequent non-compliance, damage, or injury. For technical and service information, please refer to the Model 101R/NR Service Manual. READ THE ENTIRE SAFETY INFORMATION SECTION BEFORE YOU OPERATE THE MONITOR.

Model 101R/NR Service Manual 1

SAFETY

SAFETY

Electrical This product is intended to be operated from a mains power source of nominally 100, 120, 220 and 230 V ~. The correct mains operating voltage is specified on the monitor's rear panel. To prevent electrical hazards to all personnel, this monitor must be properly grounded. The power cable supplied with this equipment provides for this protection. Do not attempt to defeat this protection by modifying the cable or by using ungrounded adapters.

WARNING: Electric shock hazard! Do not remove covers or panels. Refer service to qualified service personnel. WARNING: To avoid electrical shock, disconnect the monitor from its power source before changing fuses. Replace only with same type and rating of fuse. WARNING: Do not clean monitor while it is on and/or plugged in. WARNING: This unit uses a common isolation path for ECG leads. Do not connect any non-isolated accessories to the ECG input connected to a patient, as this may compromise the safety of the unit. When attached to other devices, insure that the total chassis leakage currents of all units do not exceed 300µA. Explosion DANGER: Explosion hazard! Do not use this equipment in the presence of flammable anesthetics. Patient Connections Patient connections are electrically isolated Type CF ⎯ ♥⎯. For all connections use insulated probes. Don't let patient connections contact other conductive parts, including earth. See instructions for patient connections in this manual. Carefully route patient cables to reduce the possibility of patient entanglement or strangulation. Leakage current is limited internally by this monitor to less than 10 µA. However, always consider additional leakage current that can be caused by other equipment used on the patient at the same time as this monitor. To ensure that the leakage current protection remains within the specifications, use only the patient cables specified in the patient connections instructions in this manual. Pacemakers: Rate meters might continue to count the pacemaker rate during occurrences of cardiac arrest or some arrhythmias. Do not rely on rate meter alarms. Keep pacemaker patients under close surveillance.

2 Model 101R/NR Service Manual

SAFETY

Electrosurgery Avoid electrosurgery burns at monitoring sites by ensuring proper connection of the electrosurgery return circuit. If improperly connected, some electrosurgery units might allow energy to return through the electrodes. Defibrillation Protection This equipment is protected against 360 J discharge and electrosurgery potentials. The monitor is internally protected to limit current through the electrodes to prevent injury to the patient and damage to the equipment as long as the defibrillator is used in conformance with the manufacturer's instructions. EMC This equipment has been certified to be protected to emissions and immunity according to IEC-601-1-2. Description of Warning Labels Attention, consult ACCOMPANYING DOCUMENTS before attempting to change

power supply selection or carry out interconnections. Equipment connected should comply with IEC-601-1 or IEC-950 with configuration to IEC-601-1-1.

Equipotential earth connector adjacent to this symbol.

Protective earth (ground) adjacent to this symbol. Internal connection on mains connector/filter.

⎯♥⎯ Type CF equipment, Defibrillator proof. _______ Fuse type/rating.

= OFF, = ON.

∼ Alternate Current (AC) Output signal.

Model 10

DANGER HIGH

VOLTAGE

1R/NR Service Manual 3

MONITOR DESCRIPTION

MONITOR DESCRIPTION The Model 101R/NR Portable Patient Monitor is a dual trace monitor for ECG and heart rate, which produces an output pulse corresponding in time to the R-wave. The monitor is intended primarily for use in timed imaging studies, TMR/PMR and any application requiring precision R-wave synchronization. Specifications ECG Lead Selection: LI, LII, LIII menu selectable. Patient Cable: 6-Pin AAMI Standard connector Isolation: Isolated from ground related circuits by >4 kV rms, 5.5 kV peak CMRR: ≥90 dB with patient cable and 51 kΩ/47 nF imbalance Input Impedance: ≥20 MΩ at 10 Hz with patient cable Frequency Response CRT: Filtered: 0.5 to 25 Hz Unfiltered: 0.5 to 45 Hz Frequency Response X1000 output: Filtered: 0.5 to 25 Hz Unfiltered: 0.2 to 100 Hz Input Bias Current: Any lead configuration <200 nA dc maximum Electrode Offset Potential: ±0.5 V DC Noise: <20 µV peak-to-peak, referred to the input with all leads connected through 51 kΩ/47 nF to ground Defibrillator Protection: Protected against 360 J discharge and electrosurgery potentials Leakage Current: <10 µA at normal condition Electrosurgical Interference Protection: Standard Notch Filter: 50/60 Hz (automatic).


MONITOR DESCRIPTION

Cardiotach Range: 15 to 255 bpm Accuracy: ±1% Resolution: 1 bpm Sensitivity: 300 µV peak Pace Pulse Rejection Width: 0.1 to 2 ms at 2 to 700 mV Tall T Wave Rejection: Rejects T waves ≤R wave Alarms High Rate: 100 to 250 bpm in 5 bpm increments Low Rate: 30 to 100 bpm in 5 bpm increments Asystole: R to R interval >6 seconds Lead Off: Detached lead or offset potential >0.5 V Test Mode ECG: 1 mV/100 ms @ 70 bpm Display Type: CRT, P31 phosphor, non-fade Trace: Dual, Fixed (moving bar), single trace normal operation. Dual trace in “freeze” mode. Screen Size: 14.25 cm by 10.2 cm, 17.5 cm diagonal Sweep Speed: 25, 50 mm/s Mechanical Size: Height: 6.25 in. (16 cm) Width: 12.5 in. (31 cm) Depth: 16.0 in. (40 cm) Weight: < 20 lbs (9 kg)

Model 101R/NR Service Manual

5

MONITOR DESCRIPTION

Trigger Output Phase Delay fromElectrode Leads to Trigger Output: < 3 ms R to R Trigger Accuracy: ±200 µs typical @ 1 mV input Sensitivity and Threshold Adjustment: Fully Automatic Optional Trigger Delay: User adjustable from 0 to 700 ms in 5 ms increments. Environmental Operating Temperature Range: 5°C to 45°C Storage Temperature Range: -25°C to 60°C Relative Humidity: 0-90% non-condensing Power Requirements Voltage Input: 100, 120, 220, 230, V ~, 50/60 Hz; +10% - 15% (to change mains operating voltage see text on Monitor Setup). Maximum ac Power Consumption: 85 VA Safety Unit meets or exceeds the specifications for the AAMI Cardiac Monitor Standard. Units meet UL544, CSA, and CE-MDD 93/42/ECC requirements. ISO-9001 Approval # 98-1044.


MONITOR DESCRIPTION

Controls and Indicators Basic Keys MAINS POWER SWITCH: A switch to control ac power input to the monitor. The | position is on, O is off.

Puts monitor into setup mode and causes setup menu to be displayed on the right portion of the screen. The monitor returns to normal mode after pressing MENU again or if no keys are pressed for 20 seconds.

Disables the audible and visual alarms for a two-minute period to allow the operator perform procedures that would otherwise set off the alarms. This avoids the problem of turning off the alarms and forgetting to turn them back on. Press this key again to return the alarms to normal before the two minutes have expired.

Generates a 1 mV pulse at 70 bpm that is displayed on the ECG trace and sent to the X1000 output on the rear panel while the switch is depressed. This is used to ensure that the monitor is functioning correctly.

Turns the alarm audio on and off. When off, the ALARMS OFF message is displayed on the left side of the screen.

Activates recorder. Push to start, push again to stop. (101R)


7

MONITOR DESCRIPTION

Basic Keys

ECG Patient Cable input

Power Switch Programmable Keys

Programmable Keys Each of the following keys, to the right of the CRT display, has a normal function, printed on the key, and two menu functions, displayed on the screen in the setup modes. The additional functions are accessed by pressing the MENU key once. Return to normal function by pressing MENU key again.

Selects the speed at which the ECG trace moves across the screen.

Stops the movement of the ECG waveform on the display for closer evaluation and displays the waveform as a second trace below the actual trace. Press FREEZE again to resume movement.

Resets the audible and visual indicators for an alarm that has been activated.

Enables the Trigger-Spot feature, which highlights the point in the ECG waveform when the trigger output pulse occurs.


MONITOR DESCRIPTION

MENU STRUCTURE

HIGH

LOW

TRIG. DELAY

(101R)


9

MONITOR DESCRIPTION

Display HEART RATE: Displayed in beats per minute (bpm) on the upper left part of the screen. SETUP: Selections made in the menu setup modes (alarm limits, lead selection, and filter on/off) are displayed in small characters at the upper right corner. ECG: Trace is displayed across the screen moving from right to left. ALARMS: The following alarm indications are displayed in reverse video. Alarm indications appear on the upper right portion of the screen and flash once per second except ALARMS OFF, which is displayed on the upper left

portion of the screen and is displayed as .

: The audible alarms have been turned off. LEAD OFF: A lead has become disconnected. This alarm cannot be reset with the ALERT RESET key. HR HIGH: The high heart rate limit has been exceeded for four seconds. HR LOW: The low heart rate limit has been exceeded for four seconds. ASYSTOLE: The interval between heartbeats has exceeded six seconds. Rear Panel The following are located on the rear panel. POWER INPUT: A receptacle for a standard ac power cord. When the monitor is connected to another piece of equipment through this rear panel connector, always make sure that each piece of connected equipment has its own separate ground connection. Do not attempt to connect cables to these connectors without contacting your Biomedical Engineering Department. This is to ensure the connection complies with leakage current requirements of one of the following applicable standards: UL 544, CSA 22.2 No. 125 or IEC 601-1. The maximum non-destructive voltage that may be applied to these connectors is 5V. TRIGGER OUTPUT: A BNC type connector for the output of the trigger pulse indicating the timing of the peak of the R-wave. The output can be delayed from the peak of the R-wave through user controls. QRS VOLUME CONTROL: A switch to control the QRS beep audio volume. Alarm audio is not affected. PEQ GROUND: Potential Equalization - A ground connection that can be used to ensure that no potential differences can develop between this equipment and other electrical equipment. FUSE: Replace only with the same type and rating of fuse as indicated on the fuse rating label.


MONITOR DESCRIPTION

ECG X1000: This is an ECG analog wave output. TRIGGER POLARITY SWITCH: Selects output trigger polarity.

PHYS. TRIG.OUTPUT

TRIGGERPOLARITY

NEG POS

QRSVOLUME

MAX

OFF

MIN

REFERS TOOPERATOR'S MANUAL

X 1000

ECG

85VA 50/60Hz

120 Vac

QRS VolumeControl

ECG Output(¼" stereo jack)Tip=ECG X1000

PEQ Ground

Voltage SelectionwheelFuse

(Beneath Panel)

Power Input

Trigger Output/BNCSelects OutputTrigger Polarity

Fuse rating 100V 120V 220V 230V T 1.6 Amp T 1.0 Amp 250V 250V 5mm x 20mm 5 mm x 20 mm


11

MONITOR SETUP

MONITOR SETUP

To setup the instrument for operation: 1. Plug the ac line cord into a power source providing the proper voltage. Check the monitor's rear panel to verify the voltage range required by the monitor. 2. Press the POWER switch at the left side of the front panel to turn power on. 3. Connect the patient cable to the ECG connector on the front panel. 4. Connect the Trigger Output from the monitor rear panel to the device being triggered. To change Mains Voltage: 1. Locate power entry module in Rear Panel. 2. Remove line cord. 3. Pry down entry cover. 4. Locate and remove voltage wheel and set for appropriate voltage. 5. Replace fuse with proper size (see fuse rating). 6. Replace cover.


TRIGGER OUTPUT

TRIGGER OUTPUT The Trigger Pulse The ECG Trigger Output produces a 100 ms, 0 - 5 V trigger pulse starting at the peak of each R-wave, which is available on the TRIGGER OUTPUT BNC connector on the rear panel of the monitor. The following shows the timing of the trigger pulse compared to the ECG waveform.

Trigger-Spot Display Press the TRIG MARK key on the front panel to highlight the portion of the ECG waveform corresponding to the timing of the trigger pulse. Press TRIG MARK again to disable Trigger-Spot. Optional Trigger Delay

Trigger delay is user adjustable by using the Trigger Delay menu. Range is from 0 to 700 ms in 5 ms increments.

Intensity modulation highlights position of ECG where delay occurs.


ECG MONITORING

ECG MONITORING When ECG monitoring, the display shows the ECG waveform across the center; the heart rate, heart rate limits, and lead selection in the upper left corner; and alarm indications. Also, a heart symbol flashes each time a heartbeat is detected. Safety Considerations

Disposable products are intended for single-use only. Do not attempt to re-use these products. Patient connections are electrically isolated Type CF ⎯♥⎯. For all connections use insulated probes. Don't let patient connections contact other conductive parts, including earth. See instructions for patient connections in this manual. Leakage current is limited internally by this monitor to less than 10 µA. However, always consider additional leakage current that can be caused by other equipment used on the patient at the same time as this monitor. Avoid electrosurgery burns at monitoring sites by ensuring proper connection of the electrosurgery return circuit. If improperly connected, some electrosurgery units might allow energy to return through the electrodes. Rate meters might continue to count the pacemaker rate during occurrences of cardiac arrest or some arrhythmias. Do not rely on rate meter alarms. Keep pacemaker patients under close surveillance.


ECG MONITORING

Patient Connections To ensure compliance with both safety and performance specifications, use the patient cables supplied by Ivy Biomedical Systems (see Accessories). Use only high quality silver/silver-chloride electrodes or equivalent. Use the following procedure for ECG monitoring: 1. Prepare each electrode site and apply the electrodes. 2. Connect the patient cable to the monitor's front panel ECG input. 3. Attach the leads to the electrodes. 4. Use the procedures described in the following sections for alarm limit settings, lead selection, amplitude

adjustment, and enabling or disabling the filter. ECG Waveform Amplitude (Size) Use the following procedure to adjust the amplitude (size) of the displayed ECG waveform. 1. Press the MENU key once. The first menu appears.

ECG HR LIMITS TRIGGER DELAY RECORDER

2. Press the first programmable key (SPEED 25/50 mm/s) once to select ECG.


15

ECG MONITORING

ECG SIZE MM/MV LEAD II FILT

3. Use the top two programmable keys to the right of the display to adjust the ECG waveform amplitude. Increases ECG size Decreases ECG size Lead Selection Select [LEAD] to change the lead selection. The current lead selection is shown below the alarm limits in the upper right portion of the display. Available lead selections are Lead I, Lead II, or Lead III. ECG Filter Select [FILTER] to turn the filter on or off. The filter on/off indication is shown in the upper right portion of the display. The filter sets the frequency response of the displayed waveform as follows: Filtered: 0.5 to 25 Hz Unfiltered: 0.5 to 45 Hz


ECG MONITORING

Alarm Limits 1. With the first menu (heart rate alarm limits) displayed, select [HR LIMITS] to change the Heart Rate Alarm

Limits.

HR LIMITS HIGH 150 LOW 30

2. Use the four programmable keys to the right of the display to set the high and low heart rate limits. Increases high HR limit Decreases high HR limit Increases low HR limit Decreases low HR limit

Each time you press a key, the corresponding limit changes by 5 bpm. The current limits are always shown in the upper left portion of the display.


17

RECORDER OPERATION


RECORDER OPERATION

101R only Changing Paper Replace the roll of thermal paper as follows. (Recorder paper is Ivy P/N: 590035) 1. Press the paper eject button to open the door at the front of the recorder.

Press Here

If the door does not open completely, pull it toward you until it is completely open. 2. Reach in and remove the spent paper core by pulling it gently toward you. 3. Place a new paper roll between the two round tabs of the paper holder. 4. Pull some paper from the roll. Make sure the sensitive (shiny) side of the paper faces the print head. The

shiny side of the paper normally faces inside the roll. 5. Align the paper with the pinch roller on the door.

Print Head

Pinch Roller

RECORDER OPERATION


6. Hold the paper against the pinch roller and close the door. 7. The paper should advance one inch. If the paper doesn’t move, open the door and repeat starting at step 5.

Recorder Menus The recorder user interface is through the menu structure of the 101R/NR. 1. Press the MENU key to display the main menu.. 2. Select [RECORDER] to display the recorder menu.

NOTE: At the start of each printout, the printer produces a header consisting of the current readings for all parameters in use at the time of the printout, whether the parameter is displayed or not.

RECORDER OPERATION


Recorder Modes Use the following procedure to select the printing mode to be used. Selections are DIRECT, TIMED and DELAY. The print mode is indicated in the lower left corner of the display. 1. Press the MENU key once.

ECG HR LIMITS TRIGGER DELAY RECORDER

2. Press the programmable key (TRIG. MARK) once to select RECORDER.

RECORDER SET CLOCK

3. Press the programmable key (SPEED 25/50) to select printing mode. Direct To print in direct, press the PRINT key. Press PRINT again to stop printing. The plot is preceded by a header which contains all parameter readings and the time/date. The speed of the plot and vertical resolution are the same as the display. The plot is labeled with the speed of the plot in mm/s, the recorder mode, and the parameters.

RECORDER OPERATION


Timed TIMED mode starts by pressing PRINT and prints for 30 seconds. Delay Delay mode plots the 19 seconds before and 12 seconds after the occurrence of an alarm condition or if print button is pushed. To set the Time and Date Use the following procedure to set the date and time. The date and time are indicated in the lower right corner of the display. 1. Press the MENU key once. The main menu appears. 2. Press the programmable key (TRIG. MARK) once to select RECORDER. 3. Press the programmable key (TRIG. MARK) once to select SET CLOCK.

N E X T

11:20 AM 25 SEPT 98 ENTER

4. Press the programmable key (SPEED 25/50mm/s) to place the flashing cursor under the hour, minutes, date, month or year. 5. Press the programmable key (FREEZE) to increase what the cursor is under or press the programmable key (ALARM RESET) to lower what the cursor is under. 6. After changing the settings press the programmable key (TRIG MARK) to ENTER the settings.

ALARM MESSAGES

ALARM MESSAGES Alarm messages are displayed in reverse video. Press ALERT RESET to reset all alarms except LEAD OFF. The following describes each of the alarm indications.

All audible alarms have been turned off. LEAD OFF A lead has been disconnected or the electrode offset potential has exceeded ±0.5 V. This alarm cannot be reset with the ALERT RESET key. HR HIGH The high heart rate alarm limit has been exceeded for four seconds. HR LOW The low heart rate alarm limit has been exceeded for four seconds. ASYSTOLE The interval between heartbeats has exceeded six seconds.


MONITOR TESTING

MONITOR TESTING Press the TEST key to test the internal functions of the monitor. You should do this each time you begin monitoring a patient. The TEST function generates a 1 mV pulse at 70 bpm, causing a waveform and a 70 bpm indication on the display and a signal at the rear panel connector. If these indications are not present, contact qualified service personnel. Under normal operation, no internal adjustment or recalibration is required. Safety tests and internal adjustments should be done by qualified personnel only. Safety checks should be performed at regular intervals or in accordance with local or governmental regulations. In the event that internal adjustment or recalibration is necessary, refer to the Service Manual for this equipment.


CLEANING

CLEANING Monitor WARNING: To avoid possible shock hazard, disconnect the monitor from the power source and detach the ECG cable before cleaning. Clean the exterior surfaces of the monitor with a cloth or swab dampened with a warm water and mild detergent solution. Do not allow liquids to enter the interior of the instrument. Patient Cables Do not autoclave the patient cables. Wipe the cables using soap and water or alcohol. Never submerge the cables in any liquid or allow liquids to enter the electrical connections.


ACCESSORIES

ACCESSORIES Accessories 3 Lead Patient Cable 590170 Patient Leads 590162 BNC Interconnect Cable Assembly 1564-01-10 8 ft long Box of 10 rolls of recorder paper 590035 (101R) Disposal Disposal of devices or consumables must be done in accordance to natural environmental laws.


THEORY OF OPERATION

THEORY OF OPERATION General This section provides general descriptions of the circuitry in the R Wave Trigger patient monitor. Refer to the schematic diagrams at the end of this manual to find the circuits described in this section. Also see the block diagram in the Troubleshooting section for an overview of the signal flow in the monitor. High Voltage Power Supply and Video Amplifier Purpose of the High Voltage Power Supply The High Voltage Power Supply generates every signal that goes to the crt except the yoke signals, which are created by the Mother Board. CRT Theory Free electrons are created in the base of the crt by applying a voltage to the filament. A large voltage (6.5 kV in this case) between the anode and cathode accelerate the free electrons from the filament to form a beam. This beam strikes the phosphor at the face of the crt and forms a dot on the screen. The yokes, one horizontal (X yoke) and one vertical (Y yoke), aim the beam by deflecting it with a magnetic field. This moves the dot across the screen, and since phosphor takes some time to cool down, this forms a line across the screen when done quickly. The grids (three in this case) can be biased to block the beam or to focus it. They are also used as intensity control. Another way of changing the apparent intensity of the beam is to change the voltage at the cathode, or to quickly switch the cathode on and off. Turning the crt beam on and off is often referred to as z axis control. This causes the beam to appear and disappear. The phosphor holds some of the light from the beam while it is off, making it appear that the beam is on but dim. Raster and Stroke Written Displays Two different strategies are used to display data on the crt: stroke writing for the waveform traces and vertical raster writing for everything else. To simplify this explanation, we will break the screen down into three parts: a vertical raster section on the left to show numbers and icons; as stroke written section in the center for writing waveform data; and a vertical raster section on the right for writing scales, alarm messages, and menus. The vertical raster written portion of the screen is divided into a grid of pixels, each pixel appearing at a fixed point. The space between pixels, although small, is always off. As the beam is traveling vertically down one row of pixels, the beam is turned rapidly on and off. It is on where a pixel is to be brightened and off where the pixel is darkened. When the crt beam reaches the bottom of one row of pixels (one raster) a retrace occurs, sending the beam to the top of the next raster to be drawn.


THEORY OF OPERATION

The vertical raster portion of the display is accomplished by turning the crt beam rapidly on and off as the beam travels vertically from top to bottom of the display at a frequency of about 16 kHz. At the same time that the beam is rapidly traveling vertically, it is also traveling in the horizontal direction with a trace time of about 4 ms for the left side of the crt. The size of the raster display on the right side of the crt differs and, depending on what is displayed, can take from 1.2 ms to approximately 3 ms. Waveform traces are displayed using stroke writing. Stroke writing is used because it offers a smooth, continuous, high resolution display. Stroke writing entails turning on the crt beam and varying the y-axis (vertical) deflection of the beam while the beam travels horizontally across the x axis. It takes about 2.8 ms to draw one complete waveform trace. Timer Circuit The Timer Circuit creates a waveform to be used by the high voltage module in the creation of the high voltages needed by the crt. It starts with the VERT SYNC input. The VERT SYNC input is a 16 kHz square wave with a duty cycle of 56% that is created on the Mother Board. The main purpose of this signal is to synchronize the video circuits on the Mother Board while the crt displays rasters. It is a steady square wave that can be used as a clock. The Timer Circuit inverts the VERT SYNC signal with a transistor and runs it to a monostable multivibrator (one-shot timer). The one-shot changes the duty cycle of the inverted waveform from 44% to between 12% and 60% (varied by adjusting the EFF potentiometer). The ability to change the duration of this signal allows the operation of the high voltage module to be fine tuned. A small duty cycle means less current to the high voltage module (longer battery life), but it also means lower display intensity during battery operation. From the output of the one-shot, the signal is buffered by a power MOSFET and sent to the high voltage module. High Voltage Module The High Voltage Module contains a circuit board that produces several relatively high voltages to be used in the control of the crt. That circuit board is the Power Module assembly, Part Number 5001-00-XX. More information about the Power Module is included in a section about that board. For now, be aware that when the High Voltage Module is supplied with a 16 kHz square wave and the feedback amplifier is working, it produces three voltages: -100 V, +275 V, and 6,500 V. Feedback Amplifier The Feedback Amplifier takes a feedback signal from the High Voltage Module, inverts it, compares it to a voltage reference (the HV potentiometer), and sends it back to the High Voltage Module. It is used to keep the 6500 volt output of the High Voltage Module within tolerances. When the 6500 volt output is within tolerance, the -100 and +275 volt outputs should also be within tolerance.


THEORY OF OPERATION

Adjustment Circuit The Adjustment Circuit takes the -100 V and +275 V outputs from the High Voltage Module, adjusts them with potentiometers, and applies them to the grids of the crt. The first grid, G1, adjusts the intensity of the crt. It is adjusted with the INT potentiometer and should be between -100 V and -14 V. The second grid, G2, also adjusts the intensity of the crt. It is adjusted with the CUTOFF potentiometer and should be between -14 V and +275 V. The third grid, G3, adjusts the focus of the crt. It is adjusted with the FOCUS potentiometer and should be between -100 V and +275 V. Cathode Generation Circuit The main function of the cathode generation circuit is to produce the CATHODE signal for the crt. CATHODE is a mixture of the TREND INT and COAX Z signals. It turns the beam of the crt on and off. The COAX Z IN is a digital signal that originates on the Mother Board, where it is called Z. It tells the crt when the beam should be off (between waveform strokes or during a retrace). The beam of the crt should be off when this signal is high. TREND INT is an analog signal used to make the waveform traces brighter or darker in relation to the raster-written data on the crt. The CATHODE Z IN signal enters the cathode generation circuit at the input of the Z buffer. The Z buffer contains an inverting buffer and transistor. The inverting buffer allows the signal to drive the following transistor without being severely loaded. That transistor also inverts the signal again and changes the level of the output. The signal produced by the transistor is similar to the CATHODE signal but not identical. TREND INT enters the circuit at the trend intensity buffer, which contains a transistor, a diode, and the TREND INT potentiometer. The transistor buffers and inverts the signal. Next, the TREND INT potentiometer changes how much TREND INT signal is allowed to enter the CATHODE signal. Finally, the diode prohibits current from flowing the wrong way through the circuit. As a whole, the trend intensity buffer sinks current from the CATHODE signal for the desired effects.


THEORY OF OPERATION

Low Voltage Power Supplies DC Voltages The Low Voltage Power Supply is on the Mother Board. Its inputs are 13.4 V~ and 6.9 V~ from the power transformer. Regulators U3, U4, and U5 generate +12 V and -12 V from the 13.4 V~. D23 uses the -12 V as an input to produce -7 V. Regulator U10 and pass transistors Q13 and Q18 generate ±8 V. From the 6.9 V~, +8 V unregulated is taken from rectifier diodes D5 and D6. Regulator U2 generates +5 V. Isolated DC Voltages Isolation transformer T1 passes power from the non-isolated portion of the Mother Board to the isolated portion. The 16 MICROSECOND SYNC signal triggers U31 which turns Q36 on and off. This creates a varying current through the windings of T1 to allow power to be passed to transformer's secondary winding on the isolated portion of the circuit. The rectifiers D50 through D51 generate an unregulated ±6.5 V. Regulator U39 produces ±5 V through pass transistors Q38 and Q39. ECG Input Isolated Amplifiers The ECG input signals (LL, LA, RA) are applied to overvoltage protection devices and to input amplifiers U54 A, B & C. The signals are then routed to lead selector switch U45. The selected signal is amplified by U46 and driven by optical couplers U42 and U43, which pass the signal to the non-isolated portion of the circuit. Lead Off Sensor If any of the leads are disconnected, a large offset on the input signal is detected by U47, which generates the LEAD OFF signal. This signal is passed to the non-isolated circuits through coupler U38 and sent to the digital circuits to generate the LEAD OFF alarm. This signal, through Q46, disables the ECG amplifiers. Shield Drive The common-mode error signal that serves as input to the shield drive circuit is derived from the signals summed through R242 and R243. This signal drives the shield drive amplifier U47. The output of the shield drive amplifier returns to the patient cable serving to prevent 50/60 Hz power interference. Lead Selection Lead select switch U45 selects proper signals according to the levels of the L0 and L1 signals from the digital circuitry. These signals are set according to the lead selection made by the user.


THEORY OF OPERATION

Test Signal Generation One of the combinations of the L0 and L1 signals indicates TEST mode. In this mode, the lead select switch is off, and a 70 bpm signal generated by U44 is sent to ECG amplifier U55D. ECG Waveform ECG Filter The signal from the output of coupler U40 and then through a low-pass filter to amplifier U26B. The signal at U26A Pin 1 is the filtered output. This signal is switched in or out by FET Q30 which is controlled by the NOTCH signal from the digital circuitry. Potentiometer RV13 (60 Hz) and RV14 (50 Hz) is used to adjust the notch filter. The processor senses the line freq from U18B and automatically switches in the correct notch filter. X1000 Output The output at U26 Pin 1 is the X1000 signal that is sent to the rear panel for use with a recorder or other equipment. ECG Gain The signal from U24 Pin 1 goes to ECG gain amplifier U24 Pin 7. The gain of this circuit is determined by resistors switched into the circuit by U25. This switch is controlled by signals G1, G2, and G3 from the digital circuitry. The gain depends on the settings made by the user. The output signal from U24 Pin 7 goes to the A/D converter in the digital circuitry. A/D Converter The A/D converter is U21 along with amplifier U22A. The converter samples the analog ECG signal and generates a series of 1,024 eight-bit numbers which can be stored in memory and then sent through the D/A converter for ECG waveform display.


THEORY OF OPERATION

Cardiotach Peak Detector The peak detector generates a pulse at the peak of each R wave. The time between these pulses is used to compute the heart rate. See the Peak Detector block diagram below. 4.5 SECOND TIME-OUT FROM CPU FILTER FULL-WAVE SAMPLE THRESHOLD ECG U26C RECTIFIER AND HOLD RV12 FROM D33, D34 U19, U23D NOTCH FILTER PEAK DETECT 7-70 MS COMPARATOR TEST U23D, D37, C82 U30A EVENT TO DIGITAL CIRCUITS PACEMAKER RESET U20 The ECG signal is picked off by amplifier U26C through a filter made up of R126 and C66 and the components in the feeback of U24D. This removes the baseline and T waves from the ECG signal. The signal is rectified by diodes D33, D34 to make sure that the R waves are always positive. The output of the filter and rectifier at U23 Pin 8 is a group of positive pulses for each QRS complex. The first large pulse is the R wave. For a pulse to be detected, it must exceed a threshold, which is based on the amplitude of the last accepted pulse and is fine adjusted by potentiometer RV12. Sample and hold circuit U19 with U23D holds the peak level of each accepted pulse to form the threshold for the next pulse. When a pulse exceeds the threshold, U23B Pin 7 goes low. When the peak occurs, U23B Pin 7 goes high. The time between when the signal exceeds the threshold and when the peak occurs must be between 7 and 70 ms for the pulse to be accepted. The 7 and 70 ms timing pulses are generated by one-shots U30. If the signal is accepted, the CPU generates a 10 ms EVENT pulse. The leading edge of the EVENT pulse occurs at the peak of the R wave. This signal goes to the digital circuitry for heart rate computation. Each filtered and rectified QRS complex usually generates more than one acceptable pulse. Therefore, the EVENT signal usually has two 10 ms pulses for each heartbeat. A 200 ms blanking in the digital circuitry eliminates all but the first pulse. A 4.5 second time-out is produced by the CPU. If no acceptable pulses occur for 4.5 seconds, this one-shot times out and generates a signal that turns on U19. This causes the threshold circuit to acquire a new level. Whenever a pulse is detected that is less than 7 ms wide, it is assumed to be a pacemaker spike. In this case, U20 is triggered, generating a 30 ms pulse, which turns on Q22 and Q23 to discharge the filter capacitors and turns on Q31 to inject the last threshold level into the peak detector comparator input. The Trigger Output at the rear panel connector is derived from the EVENT signal. This output is one 1 ms pulse for each QRS complex, with the leading edge corresponding to the peak of the R wave. The signal level is -12 V to


THEORY OF OPERATION

+12 V. Other output pulses (+5 TTL) may be generated by removing U12 and changing C56 and R111. See component matrix on schematic. Rate Computation The EVENT signal goes to PLD U36 in the digital section where the 200 ms blanking removes all but one pulse for each heartbeat. The ouptut of the flip-flop goes to the interrupt input of the microprocessor U48. The microprocessor measures the time between interrupt pulses and computes the heart rate. Alarm Generation The microprocessor compares the current heart rate to the limits set by the user. If the limits are exceeded, the appropriate alarm signal is generated. CRT Signals Refer to the Key Signals portion of the Testing and Troubleshooting section of this manual for diagrams of each of the crt signals. Vertical Deflection The display generation is broken up into two timing periods, one for the raster display (digital information and alarms) and the other for the stroke display of the ECG waveform. Each time period is 9.2 ms. The raster display also contains two time periods. The first is for the left display and the second for the right display. The left display contains the heart rate display, the setup information, and the ALARMS OFF indicator. The right display contains the alarm indicators. During the stroke display period, the vertical deflection is the ECG waveform signal. This signal is selected through FET Q15 to the vertical deflection amplifiers U6 and U9 and transistors Q1, Q2, Q5 & Q6. During the raster display period, the vertical deflection is the vertical ramp generated by U8B, with its timing set by the V SYNC signal. The vertical ramp is passed through Q15 to the vertical deflection amplifiers. Horizontal Deflection The horizontal ramps are generated by U16 and U17 with timing controlled by the H SYNC signal. Four ramps are generated in each timing cycle. The two small ramps are for raster display, and the large ramps are for stroke display. An offset for the right side raster display is added to the circuit through U11D. Horizontal Correction Because the face of the crt is flat and the beam originates at a single point, the speed of the beam as it strikes the face is greater near the edges than at the center. Therefore, correction circuitry is required to produce a waveform that is linear over the entire screen. The linearity correction is provided by U17 and associated components. The correction circuitry produces two signals that are added to the horizontal ramp to correct the linearity. First, U16A integrates the horizontal ramp to produce a parabolic waveform. This waveform is the mathematical equivalent of the speed of the beam across the crt face. This signal is inverted by U16B. The original signal and its inverse are fed into the SYM potentiometer RV6, which selects the portion of the positive or negative waveform required to produce a symmetrical trace between the left and right sides of the crt. The second signal is an S-shaped waveform generated by U17A, which integrates the parabolic signal from U17B. This S-shaped signal, when added to the horizontal ramp has the effect of slowing the beam near the edges of the


THEORY OF OPERATION

screen. The amount of this signal added to the ramp is adjusted by the S potentiometer RV4. This allows adjustment of linearity between the edges and the center of the screen. Using the adjustments described above, it is possible to achieve a linear signal across the entire crt screen for any crt. These adjustments should be done whenever a crt or Mother Board is replaced. The complete horizontal deflection signal including correction is summed at U7 Pin 2 and goes through amplifier U7 and transistors Q3, Q4, Q7 & Q8. Unblanking The unblanking (Z) signal indicates when to brighten the crt. This signal is created in the digital section. For the raster display, short pulses cause the brightening of each dot needed to generate the characters to be displayed. For the stroke portion, the signal is high during the entire horizontal sweep displaying the ECG waveform. Audio Circuits Two types of audio is produced by the monitor: a QRS beep and an alarm tone. The QRS beep is a short tone that is generated each time a QRS complex is detected by the monitor. The alarm tone is produced when any of the alarms are triggered. The alarm tone can be disabled by pressing the front panel ON/OFF button. ECG Audio The audio signal originates in the digital circuitry. The ECG AUD signal is enabled at U51 by an output from the processor's I/O port U51 Pin 11. This signal allows the audio frequency from U51 to be passed to the audio amplifier. Two levels of ECG AUD, through resistor R90, go to the rear panel QRS VOLUME switch as AUDIO HI and AUDIO LO, where the user can select a high, low, or off setting. The selected signal then goes to the audio amplifier U13 and transistors Q19 and Q20, which drive the speaker. Alert Audio The ALRT AUDIO is enabled by the output from U36 Pin 18 in the digital circuit The ALERT AUD signal passes through volume adjust potentiometer RV11 to the audio amplifier U13.


THEORY OF OPERATION

Digital Circuitry The digital circuitry consists of the microprocessor and its associated components. The 8 MHz clock is generated by the F1100.. The microprocessor is U48. U49 is the read only memory (ROM), which contains the program to operate the system. U32 is an input/output (I/O) port for passing information to and from the microprocessor circuits. U52 is random access memory (RAM). This memory is for temporary storage of data that the microprocessor must store. U36 generate timing signals for the system. For the stroke display, the microprocessor sends the digital ECG waveform through FIFOs U27 and U28 to D/A converter U29 to generate the D/A signal that gets switched into the vertical deflection signal during ECG waveform display. For raster display, the microprocessor sends the data through U36 and U15 to generate the Z signal. This signal brightens the crt at the proper times to generate the characters.


TESTING AND TROUBLESHOOTING

TESTING AND TROUBLESHOOTING ECG Test Equipment Required: ECG Simulator (Fogg Model M310 or equivalent) Initial Settings for the Test HR high alarm limit 120 HR low alarm limit 40 Lead select I Filter ON Alarms ON (ALARMS OFF message not displayed) ECG Test Procedure 1. Connect the patient cable and simulator to the monitor and set the simulator as follows: • Heart rate of 70 bpm • Amplitude of 1.0 mV 2. Observe the following on the monitor display: • ECG Lead I is displayed and is noise free • Heart rate of 70 ±1 bpm • The heart next to the heart rate indicator flashes with every QRS complex displayed. 3. Verify that ECG Leads I, II, and III display properly. 4. Change the heart rate on the simulator to 40 bpm. Notice the following: • The HR LOW message appears over the ECG trace. • Heart rate value of 40 ±1 bpm is displayed.



5. Press ON/OFF. Notice the following: • Audible alarm stops • ALARMS OFF message is displayed. 6. Press FREEZE. The waveform stops. 7. Press FREEZE to make the trace move again. 8. Press SPEED. The trace speeds up to twice its previous speed. 9. Press SPEED to slow the trace down again. 10. Press ON/OFF. The ALARMS OFF message goes off. 11. Adjust the high heart rate limit to 100 bpm. 12. Set the simulator heart rate to 120 bpm. The HR HIGH message is displayed, and an audible alarm sounds.



Troubleshooting The monitor is made up of the following parts: Front Touch Panel Power Input Rear Panel Heat Sink Mother Board High Voltage Power Supply Board Trigger Board CRT Display This manual provides information to help determine which of these parts might be the cause of a problem. A simple block diagram of the monitor is included in this section to help. See the Disassembly procedure in this manual for removing the top cover. General Checks The first step is to determine what doesn't work. If nothing works, check those things that you would check on any instrument. 1. Make sure of the power source 2. Check the monitor's main fuse 3. Check the fuses on the low voltage side inside the monitor. CRT Display The display is generated from signals developed on the Mother Board. The crt gets its high voltage and cathode signal from the High Voltage Power Supply board. If there is no picture at all, the problem is most likely the crt itself or the HVPS board. See the Key Signals section to check these components. If there is a display but either the horizontal or vertical deflections are wrong, the problem is most likely the Mother Board. Mother Board The Mother Board has all circuitry for processing the ECG, computing heart rate, and generating the alarms and the audio. Therefore, any problems with these functions are caused by problems on the Mother board. Once you have determined the major component causing the problem, refer to the Disassembly section for instructions on replacement.



Troubleshooting Table General

No Apparent Power

1. Power source 2. Main fuse 3. Internal fuses

No Display (Check Key Signals)

1. CRT 2. HVPS board 3. Mother Board

CRT

Bad Horizontal or Vertical

1. Mother Board

Test OK

1. Patient Cable 2. Connector-Front Panel to Mother Board 3. Input Amplifiers on Mother Board

ECG

Test Not OK

1. Mother Board

No Audio At All

1. Mother Board 2. Connection to Speaker 3. Speaker

No Alarm Audio

1. Alarm On/Off Setting 2. Mother Board

Audio

No ECG Audio

1. Rear Panel switch setting 2. Mother Board



Block Diagram AUDIO CIRCUITS SPEAKER U13,Q19,Q20 FRONT PANEL RAMP HORIZONTAL GENERATOR DEFLECTION U16A U7 HORIZONTAL CORRECTION U17 HIGH VOLTAGE POWER SUPPLY AND VIDEO CRT AMPLIFIER CPU AND DIGITAL CIRCUITS D/A CONVERTOR U29 MULTIPLEXER VERTICAL Q15, Q16 DEFLECTION U6 RASTER GENERATOR U8B A/D CONVERTOR U21 TRIGGER PEAK CIRCUITRY TRIGGER DETECTOR U18A, U12 OUTPUT U23B ISOLATED TEST CIRCUIT U44 PROTECTION LEAD NOTCH CIRCUITS SELECT FILTER U45 U26C ECG INPUT SHIELD DRIVE ECG X1000 BUFFER MOTHER BOARD



Voltage Measurements The following procedures include voltage checks, key waveforms, and some adjustments. These procedures are only for qualified technicians with appropriate equipment, such as an oscilloscope and digital voltmeter. In most cases, the procedures in the Troubleshooting section of this manual are adequate for determining which major component of the monitor is the cause of a problem. Schematic diagrams of the monitor are included at the end of this manual. See the Disassembly procedure in this manual for removing the top cover. Measure the following voltages with a DVM using the ground connection lug on the rear panel as the reference. See Mother Board layout for test point (TP) locations. Unregulated Voltages +20 V Measure at fuse F3 Normal: 14.5 to 20 V -20 V Measure at fuse F2 Normal: -14.5 to -20 V +8 V Measure at fuse F1 Normal: 6.5 to 8.5 V Regulated Voltages +12 V Measure at +12 TP Normal: 11.6 ±0.7 V -12 V Measure at -12 TP Normal: -11.6 ±0.7 V +12 X Measure at +12X TP Normal: 12 ± 0.5 V +5 V Measure at +5 TP Normal: 5 V ±100 mV +8 V Measure at +8 TP Normal: 8 V ±10 mV -8 V Measure at -8 TP Normal: -8 V ±100 mV -7 V Measure at -7 TP Normal:-7 V ±200 mV VREF Measure at V REF TP Normal: 2.41 V ±5 mV Isolated Voltages Measure the following in the isolated section of the Mother Board using ISOL GND TP as the reference. See Mother Board layout for test point (TP) locations. +6.5 V Measure at +6.5 TP Normal: +6.5 to 7.0 V -6.5 V Measure at -6.5 TP Normal: -6.5 to 7.0 V Smaller of above must be 6.5 V; neither more than 7.0 V. +5 V Measure at +5 TP Normal: 5.0 V ±200 mV 5 V Measure at -5 TP Normal: +5 reading ±100 mV Both 5 V must be within 100 mV of each other.



High Voltage Power Supply +275 V Measure at +275 TP Normal: +100 to +400 V -100 V Measure at -100 TP Normal: -50 to -125 V Key Signals The following are a few signals to help verify the proper operation of the monitor. Use an oscilloscope and refer to Mother Board layout for test point locations. ECG Waveform 1. Press and hold the TEST button on the monitor's front panel. 2. Put the scope probe at the rear panel X1000 output. The signal should appear as 1 V peak pulses. The

same waveform should appear on the monitor's display. The rate indication on the display should be 70 bpm.

This verifies the operation of the ECG circuitry from very near the front of the monitor's ECG section. To

verify the remaining circuit, use a simulator at the ECG input to generate a 1 mV ECG signal. CRT Display The following are signals generated by the Mother Board for creating the display. If these signals are correct but the display isn't, the problem is not on the Mother Board. See Mother Board layout for test point locations. For each of the following the signals, trigger the oscilloscope (negative) on Raster Enable (RE test point). Raster Enable RE Test Point

Vertical Deflection Signal Vi Test Point



Horizontal Deflection Signal Hi Test Point

CRT Unblanking Signal (Z) Z Test Point - Part of signal blinks with alarm indication.

To verify operation of the High Voltage Power Supply board, check the dc voltages as indicated in the Voltage Measurements section (High Voltage Power Supply). Also check the following dc filament voltages at the crt socket harness. 5 V brown Normal: 4.9 to 5.1 V -7 V black Normal: -6.8 to -7.1 V



Adjustment Procedure The following adjustments are not meant as field procedures. However, if these procedures are attempted, they must be done correctly and according to the procedures listed here. See the Disassembly procedure in this manual for removing the top cover. Equipment Required Digital Voltmeter Sine Wave Generator Oscilloscope ECG Simulator ECG Signal 1. Press and hold the TEST button on the monitor's front panel. 2. With an oscilloscope, look at the signal at the X1000 output on the rear panel. 3. Adjust RV17 (ECG BAL) until the signal's baseline is at 0 V. 4. Adjust RV18 (ECG GAIN) until the peak signal is 1 V. 5. Repeat adjustments as necessary. 50/60 Hz Notch Filter 1. With the monitor's front panel controls, set the filter to ON and the lead selection to Lead I. 2. Insert a 10 mV p-p 50 or 60 Hz sinusoidal signal into the monitor's front panel ECG input. See the

diagram below for a suggested input circuit.

3. With an oscilloscope, look at the signal at the NOTCH test point on the Mother Board. 4. Adjust RV13 for 60 Hz and RV14 for 50 Hz for minimum amplitude signal at the NOTCH test point. This

signal should be ≤600 mV p-p. To turn on the correct filter set TP21 high (+5) for 60 Hz and ground for 50 Hz. A clip lead tied to +5 or ground will accomplish this.

5. From the front panel, set the filter to OFF. The signal at the NOTCH test point should be approximately 10

V p-p. 6. To test the auto notch function, plug unit into a variable freq. power generator and slowly change the line

freq. from 50 to 60 Hz. Peak Detector 1. With the oscilloscope, look at the signal at U23 Pin 7.



2. Connect the ECG simulator and adjust the ECG level so that only one pulse is present at U23 Pin 7. 3. Put the oscilloscope on the T1 test point. 4. Put the oscilloscope on the T2 test point. 5. Set the simulator for an ECG input signal of 300 µV. Put the oscilloscope probe at U23 Pin 7. 6. Adj RV12 (T'HLD) until the signal at U23 Pin 7 changes to two pulses. CRT Display • Beam Centering 1. Reduce the intensity using the intensity pot at the top of the High Voltage Power Supply board. 2. Remove connector J202 from the Mother Board. 3. Adjust the rings at the rear of the crt to place the beam in the center of the screen. 4. Replace J202 and readjust the intensity. • Yoke Straightening 1. With no ECG input signal, loosen the screw holding the yoke clamp at the rear of the crt. 2. Rotate the yoke so that the trend line on the display is horizontal. 3. Tighten the yoke clamp screw. • Horizontal Adjustments 1. Put the oscilloscope on U16 Pin 1. There should be two large ramps and two small ramps. 2. Adjust RV15 so that the peak of the large ramp is 3.4 V. 3. Adjust RV5 so that the trend line (ECG waveform line) is 132 mm long. 4. Adjust RV16 (SS ADJ) so that the ALARMS OFF display area is 33 mm across. 5. Press the TEST button on the monitor's front panel. When pulses appear across the entire screen, press

FREEZE to stop the motion. 6. Adjust RV4 (S) and RV6 (SYM) to make the pulses evenly spread across the screen. The S adjustment

controls the linearity between the middle and ends, and the SYM adjustment controls the linearity from end to end.

7. Press FREEZE and release TEST so that there are no pulses. Press the MENU button. 8. Adjust RV9 (RSTP) so that the right end of the trend line just touches the left of side the menu box. 9. Repeat the above steps as necessary. • Vertical Adjustments



1. Put the oscilloscope on U8 Pin 7. 2. Adjust RV1 (RASTER) so that the negative peak of the signal at U8 Pin 7 is at -2.5 V. 3. Press the MENU button on the monitor's front panel. 4. Adjust RV2 (V GAIN) so that the menu box is 86 mm high. 5. Adjust RV3 (V BAL) to center the menu box between the top and bottom of the screen. 6. Press the MENU key again to display the second menu. 7. Adjust RV8 (DA0) so that the trend line is at the same level as the center horizontal line in the second

menu. 8. Repeat the above adjustments as necessary. • High Voltage Power Supply Board 1. Adjust the Focus and Intensity adjustments near the top of the High Voltage Power Supply board for the

desired display. 2. Adjust the Trend Intensity adjustment on the HVPS board to set the trend line intensity separately. • Isolation and Leakage Tests Use a leakage tester or use the ac voltage range on a digital voltmeter to measure across a 1 kΩ resistor in parallel with a 0.15 µF capacitor and 10 Ω resistor.

1. Measure between a known ground and the monitor's ground post on the rear panel. Wth the line cord

properly grounded, with the ground removed, and with the line cord reversed, the readings should be less than 20 µA.

2. With the line cord grounded, measure between shorted patient leads and the hot side of the ac line. The

reading should be less than 10 µA.


ASSEMBLY AND DISASSEMBLY

ASSEMBLY AND DISASSEMBLY This section describes procedures for disassembly of the monitor for replacement of major components. For reassembly, use the same procedures but work in reverse. Always remember to save all hardware and to re-install any connectors removed during disassembly. Removing the Cover WARNING: Potentially dangerous voltages are present inside the monitor. Always disconnect the power cord from the ac outlet before removing the cover. Failure to comply could result in personal injury. 1. Disconnect the power cord from the ac outlet. 2. Remove the two screws in the rear that attach the top cover to the rear panel. 3. Slide the cover back and lift it off. 4. To remove the bottom cover, turn the monitor upside-down and use the same procedure. Removing the High Voltage Power Supply 1. Remove the top cover as described above. The High Voltage Power Supply board is mounted vertically near the front of the monitor near the crt. 2. Remove J301 from the High Voltage Power Supply board. 3. Remove the connector from the back of the crt. 4. Remove the crt anode cap from the front of the crt by pulling up on the rubber from the edges. 5. Pull the High Voltage Power Supply board up and out of the card guides.



Removing the Yoke The yoke is the electronic assembly located at the rear of the crt. 1. Remove the top cover as described above. 2. Remove the High Voltage Power Supply board as described above. 3. Remove J202 from the Mother Board. 4. Loosen the screw holding the yoke clamp on the crt and slide the yoke assembly off. Removing the CRT 1. Remove the High Voltage Power Supply board as described above. 2. Remove the spring across the front of the crt. 3. Remove the two screws holding the crt bracket on the center side of the crt. 4. Tilt the crt toward the side of the monitor and guide it out of the unit. 5. After replacing the crt, do the CRT Display adjustments described in the Testing and Troubleshooting

section of this manual. Replacing the Main Power LED 1. Remove the top cover, the High Voltage Power Supply board, and the crt as described above. 2. Remove the LED retainer and pull out the LED. 3. Push in a new LED and replace the retainer. Removing the Recorder Assembly 1. Open the recorder door and remove the paper from the recorder. 2. Loosen the two captive Philips-head screws inside the recorder housing. 3. Pull the Recorder Assembly straight out from the monitor.



Removing the Mother Board The Mother Board is the main board in the monitor and is located across the bottom of the monitor. 1. Remove top and bottom covers as described above. 2. Remove the following connectors: J201 Main Harness J202 Yoke J203 Front Panel J204 ECG Input J205 LED 3. Turn the monitor over and remove the screw at the front of the Mother Board that attaches the board to the

front panel. 4. Remove the four screws across the bottom of the rear panel. 5. Squeeze the tabs on each of the plastic standoffs and gently pull on the board to remove it. Removing the Touch Panel The Touch Panel is glued to the front bezel. 1. Remove the top cover as described above. 2. Disconnect J203 (ribbon cable) from the Mother Board. 3. Use a knife to work a corner of the Touch Panel loose and pull the panel away from the front bezel. 4. Feed the ribbon cable through the slot in the front plate. 5. Make sure the clear plexiglas window is in place in the bezel. Then feed the ribbon cable on the new

Touch Panel through the slot in the bezel. 6. Peel the protective backing from the Touch Panel and carefully press the panel onto the front bezel. 7. Connect J203 (ribbon cable) to the Mother Board.


PURCHASING INFORMATION

PURCHASING INFORMATION Parts List The following are the part numbers for the major components in the monitor. Component Part Number High Voltage Power Supply & Video Assy 1117-00-01 Mother Board 5119-00-01 CRT 570000 LED 1062-00-01 Front Touch Panel (101R) 1010-03-10 Front Touch Panel (101NR) 1010-04-10 Terms and Conditions • All prices are F.O.B. Branford, Connecticut. Payment: Net 30 days. • Minimum order is $100 on all orders requiring an invoice prior to payment. When payment accompanies

purchase order, no minimum applies. • A 15% restocking charge will be made on an instrument returned for credit or exchange, unless a waiver is

issued, in writing, by an employee of Ivy Biomedical Systems, Inc. • One instruction manual and service instructions are supplied with each instrument. Additional copies may be

ordered at $25 each.


BOARD LAYOUT DIAGRAMS


This page is intentionally left blank.


Model 101R/NR Service Manual A


SCHEMATICS

Model 101R/NR Service Manual B

SCHEMATICS

SCHEMATICS


This page is intentionally left blank.

8

8

7

7

6

6

5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

J201-6

J201-15

TO SHT. 4

TO SHT. 4

J201-10

J201-14

J201-18

G

D

S

TO SHT. 4

D

S

G

J201-16

J201-32

J201-25

J201-21

J201-22

J201-33

J201-34

J201-3

J201-29

J201-11

J201-12

J201-13

J201-17

J201-35

J201-36

J201-23

J201-4

J201-5

J201-9

OUTPUT

J201-27

J201-31

TO SHT. 4

|LINK

TO SHT. 4

TO SHT. 4TO SHT. 4

B

CE

BC

E

BE

C

B

E C

**

*

TO SHT. 4

TO SHT. 4

TO SHT. 4INSTALL WITH

RECORDER OPTION

OPTION 1

OPTION 2

OPTION 3

RV10

C56

1ms

60.4K

100K

.01UF

200ms

806K

200K

.22UF

* TRIGGER PULSE OUTPUT

1UF

60.4K

100K

DATEBYDESCRIPTIONREVREVISIONS

R111

01 REVISED FOR REV-01 ARTWORK FAB PER ECN 741. GP 11-26-97

4. ONLY 1 OF THE 3 OPTIONS ARE TO BE POPULATED WITH COMPONENTS AT A TIME.

TO SHT. 4

GP 7-27-98REVISED PER ECN 804.02GP 7-27-9803 REFERENCE REJECTED ECR 803.GP 7-27-9804 REVISED PER ECN 805.

05 REVISED PER ECN 817. GP 8-5-9806 REVISED PER ECN 868. GP 1-25-9907 REVISED PER ECN 934. GP 4-12-9908 REVISED PER ECN 970. GP 8-6-9909 GP 11-20-00REVISED PER ECN 1052.

NOTES:1. ALL RESISTORS ARE 1/4W 1% U.O.S.

L1,LD3,Q48,R274,RN2,RV19,T1,TP43,U54,Y1.

2. LAST USED: C144,D73,F4,FB4,J207,JP5,

3. NOT USED: JP2,JP3,U19,U37,U50.

7-17-017-17-01

GPGP

REVISED PER ECN 1104.REVISED PER ECN 1105.

1011121314

REVISED PER ECN 1216.REVISED PER ECN 1217.REVISED PER ECN 1218.

GPGPGP

12-12-0212-12-0212-12-02

100ms/150ms

15 REVISED PER ECN 1251. GP 2-4-03

|C:\ORCAD\SHEET\SH5119\5119-002.SCH|C:\ORCAD\SHEET\SH5119\5119-003.SCH|C:\ORCAD\SHEET\SH5119\5119-004.SCH|C:\ORCAD\SHEET\SH5119\5119-005.SCH

5119-00-01 (-03 SCHEMATIC) 15

MOTHER BOARD 1 ASSY, WITH RECORDER OPTION

IVY BIOMEDICAL SYSTEMS INC.11 BUSINESS PARK DRIVEBRANFORD, CT. 06405(203) 481-4183

C1 4Tuesday, March 08, 2005

Title

Size Document Number Rev

Date: Sheet of

+12V

+10/13.5VDC

13.4_VAC

FILTER_GND

FILTER_GND

A_GND

A_GND

A_GND

13.4VAC

-12V

A_GNDAUDIO_HI

AUDIO_OFF

6.9_VAC SPEAKERAUDIO_LO6.9VAC SPEAKER_GND

+5VFILTER_GND FILTER_GNDAUDIO_SHIELD13.4_VACECG_VOLUME13.4VACECG_AUDIO +10/13.5VDCA_GND A_GNDFIL_GND FIL_GND

6.9_VAC

6.9VAC

FIL_GND

FIL_GND

D_GND

D_GND

D_GNDAUDIO_HI

ECG_AUDIO

ECG_VOLUME

AUDIO_LOAUDIO_OFF

AUDIO_SHIELDSPEAKER_GND

SPEAKER

T500

ALERT_AUDIO

DELTRG

ALERT_OUT

V_SYNC-

ZZ_GND

T150-

ECG_AUDIO

TREND_INT

ECG_X1000

REC_GND

LNFREQ

+12VREC

TRGOUT

D

D

D

D

DD

D

DD

D

D

D

A

D

D

DD

A

D

D

D

D

A

A

A

A

A

AA

A

A

A

DD

D

D

D

D

D

D

D

A

+12V

+12V

+12X

+12V

+5V

+5V

+5V

+5V

+12V -12V

+5V

+12V+5V

-12V-12V

-12V

-12V

-12V

+5V

+8V

-8V

+12V

+5V-7V

-7V

+12V

U13LF3513

2

1 5

6

74

R9249.9K

TP17TRIGGER

J207POWER ON

LED

12

R91

30.1KC5210000PFNPO

R81470 OHM1/2W 10%

C51

.1UFCER

C49.0047UF MP

TP9+12V

R97100 OHM

2W 5%

R77

301K

R271402OHM

R76

499 OHM

U4LM78L12ACZVI

GN

D

VO

R272

1K

TIME ADJ.RV10

TOP ADJUST

C4.1UF CER

R87

3.01KC48.022UF MP

R7547.5 OHM

U10AMC34002P

1

84

3

2

Q202N3903

13

2

TP5+12X

+

-U10B

MC34002P

756

+ C1210000UF35V

Q192N3906

13

2

+ C1310000UF35V

R8247.5 OHM

F3

3ASB 2AG

R8630.1K

F4

3ASB 2AG

TP14SPEAKER

D10

1N5624

D91N5624

TP24A GND

C50

.1UFCER

TP15D GND

D8

1N5624

R894.99K

D111N5624

FC FC

+ C231000UF 16V

FC

+ C341000UF 16V

FC TP18+8V

TP11-8V

R5010K .1%

10PPM

C56

R4810K .1%10PPM

D281N4148

D21

1N4148

R449.09K

R83100K

R8410K

R4549.9K

+ C306.8UF TANT

D5

1N5624

C31

.1UFCER

C47

.01UFMP

D15ICL8069CCZR

D6

1N5624

D231N5338B

C32

.1UFCER

1.5ASB2AG

F2

TP20-7V

U3LT1085CT-12

H.S.

VI

GN

D

VO

FC

1.5ASB2AG

F1

+ C1415000UF16V SH

R47

1K

FC

H.S.U1

LT1085CT-12

VI

GN

D

VO

R4620K

U2LM2940T-5.0H.S.LM2940T-5.0

VI

GND

VO

FC

R41

10K

Q132N39061 3

2

FC

R3910 OHM

R43

499 OHM

Q112N3903

13

2

R3110 OHM

Q12

2N3903

13

2

R491K

R421K

R51499 OHM

R38475 OHM

Q182N3903

1 3

2

R4022.1 OHM

R52

10 OHM

J206174000

1234

TP19+5V

D121N5624

+ C52200UF35V

C1.1UF CER

TP10-12V

D71N5624

R793.01K

+ C32200UF35V

R785.11K

+ C66.8UFTANT

R951K

C59

1000PFNPO

+C45

100UF 25V

+C46

100UF 25V

U12MC1488P

14 1

2

4

3

659

10

7

1312

8

11

+V -V

1A

2A

1Y

2Y2B

3A3B

GN

D

4B4A

3Y

4Y

Q17

2N5460 3

21

R111

J201194000

REAR PANEL

1 23 45 67 89 1011 1213 1415 1617 1819 2021 2223 2425 2627 2829 3031 3233 3435 36

D221N4148

R801.47M

C54.033UF MP

R9610K

+ C21000UF16V

R902K

R11310K

RV1120K TOP

AUD. VOL.

R11210K

R1144.75K

U18AICM7556

6

3

51

2

4 14

7

TR

CV

Q

DIS

THR

R V+

V-

C58

.22UFMP

R851.47M

D291N4148

U18BICM7556

8

11

9

1312

10

TR

CV

Q

DIS

THR

R

Q212N5460

3

21

U5LT1033

H.S.LT1033

VI

AD

J

VO

C53

.1UF MP

C55

10000PFNPO

R11K

R8847.5 OHM

R2121 OHM

8

8

7

7

6

6

5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

G

S

D

G

D STO SHT. 4

TO SHT. 4

TO SHT. 4

G

S D

G

DS

TO SHT. 4

G

S

D

TO SHT. 4

VERT. YOKE 2

VERT. YOKE 1

HO

R. YO

KE 2H

OR

. YOKE 1

J201-7

TO SHT. 4

TO SHT. 1

BE

C

BE

C

BE

C

BC

E

B

E

B

E

B

C

E

B

C

E

BC

E

C

C


01 REVISED FOR REV-01 ARTWORK FAB PER ECN 741. GP 11-26-97GP 7-27-98REVISED PER ECN 804.02GP 7-27-9803 REFERENCE REJECTED ECR 803.GP 7-27-9804 REVISED PER ECN 805.


NOTES:1. ALL RESISTORS ARE 1/4W 1% U.O.S.

L1,LD3,Q48,R274,RN2,RV19,T1,TP43,U54,Y1.



7-17-017-17-01

GPGP


1011121314


GPGPGP

12-12-0212-12-0212-12-02


5119-00-01 (-03 SCHEMATIC) 15


IVY BIOMEDICAL SYSTEMS INC.11 BUSINESS PARK DRIVEBRANFORD, CT. 06405(203) 481-4183

C2 4Tuesday, March 08, 2005

Title


Date: Sheet of

D/A

V_SYNC-

H_SYNC-

MOVE-

Z_INT

R_ENABLE-

A

A

A

A

A

AA

A

A

A

A

A

A

A

A

A

A

A

A

AA

A

A

A

A

A

A

A

A

A

AA

A

A

A

AA

A

A

A

AA

AA

A

A

A

A

+8V

+5V

+8V

+5V

-8V

-8V-8V

+5V

+12V

+12V

+12V

+12V

+12V

+12X

+8V

-12V

-12V

-12V

-12V

-12V

-12V

-12V

+8V

+8V

-8V

+8V

-12V

+5V

-8V

+5V-8V

-8V

+12V

-12V

+-U16C

MC34004P10

98

R61

10K

-+U17D

MC34004P

1213

14

R10410K

D241N4148

R60200K

R10510K

R10652.3K

R6310K

R7424.9K

R6210K

+-U16D

MC34004P

1213

14

U11DDG201ACJ

16

14 15

-

+U17A

MC34004P32

1

411

U11ADG201ACJ

1

32

13

5

4 12

+

-U6

LM318

32

65

18

74

U11BDG201ACJ86 7

C38

.1UF MP

R19

100 OHM

U11CDG201ACJ

91110

C17

.1UFCER

D25

1N6263

D19

1N6263

R5910K

R73150K

C44

.01UF MP

R26

80.6K

R108

10K

RV3

20K TOPV. BAL.

-

+U17B

MC34004P

56

7

C42

.1UFCER

C41

.1UFCER

C18

.1UFCER

C15100PF

NPO

R10910K

R110162K

RV4

5K TOP"S"

R2815K

D11N6263

D21N4148

J202YOKE

12345

RV5

20K TOPH. GAIN

R279.09K

R2930.1K

R5

100 OHM1/2W 5%

RV6

5K TOPSYM.

C8.47UF

MP

R7010K

R6849.9K

-+U17C

MC34004P

109

8

RV9

50K TOP"RT. SIDE" TEXT

Q62N3903

13

2

D201N4148

Q52N3906

13

2

R6910K

R34.99K

R74.99K

R5810K

R6

27 OHM1/2W 5%

U7

LM31832

65

18

74

Q22N6490H.S.

32

1

Q12N6487

23

1

R20100 OHM

R4499 OHM

R8499 OHM

+ C9100UF25V

Q14PN4393

3

12

C21

.1UFCER

+

C7

100UF25V

R361K

C22

.1UFCER

U9LF351

32

1 5

6

74

R234.99K

C28

.1UFCER

C16

470PF NPO

C29

.1UFCER

R22806 OHM

RV2

1K TOPV. GAIN

R171 OHM5W 5%

C19100PF

NPO

R9470 OHM1/2W 10%

D41N4148

TP1VERT.

TP3Vi

D31N6263

R144.99K

TP6V SYNC______

R104.99KC24

220PFNPO

Q82N3903

13

2

R331K

Q72N3906

13

2

R32

3.32KQ92N3906

13

2

R11499 OHM

D13

1N4148

R15499 OHM

R342.21K

R16470 OHM1/2W 10%

R13100 OHM1/2W 5%

Q10

PN4393

3

12

R2110K

Q42N6490H.S.

32

1

Q32N6487H.S.

23

1

C25

.01UF MPD14

1N4148

+ C11100UF25V

+

C10100UF25V

R351K

TP2HORIZ.

C26

.1UFCER

H.S.

R12470 OHM

1/2W 10%

C27

.1UFCER

TP4Hi

R3080.6K

RV7

20K TOPH.CTR.

R5410K

R2415K

R5312.7K

C20

.001UF MP

R182.4 OHM5W 5%

TP8D/A

R25

9.09K

TP7VRAMP

RV1

5K TOPRASTER

TP22HRAMP

Q25PN4393

3

12

TP12MOVE____

R72200K

R135110K

D311N4148

Q16

PN4393

3

1 2

RV1650K TOPSLOW SWEEP ADJ.

U8B

MC34002P

75

6

Q15PN4393

3

12

-+U16A

MC34004P3

21

411

U8A

MC34002P

1

84

3

2

-+U16B

MC34004P

5

67

R67200K

D261N4148

D181N4148

C39

.1UFCER

C40

.1UFCER

R666.04K

R6549.9K

C37.1UF

CER

RV8

20K TOPD/A 0

R107

80.6K

RV1550K TOP

RAMP

R641.5K

C36

.1UFCER

C43

.1UFMP

R3720K

R562M

+

C33

6.8UFTANT

D17

1N4148

D161N4148

D27

1N4148

R57

1M

+ C356.8UF TANT

TP23

RASTER______

ENABLE______

R553.01K

TP13H SYNC______

8

8

7

7

6

6

5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

TO SHT. 4

SHIELD_DRIVE

D S

G

J204-1

GUARD

D S

G

GUARD

D S

G

GUARD

J204-2

J204-3

SHIELD

G

S

D

G

S

D

D

S

G

ISOLATED

J201-24

TO SHT. 4

TO SHT. 4

TO SHT. 4

TO SHT. 4

TO SHT. 1

D S

G

D S

G

E

B

C

B

C

E

E

B

C

B

EC

E CB

B

C

E

E

B

C

EB

C

B

E

C

ECB

D

S

GNON-ISOLATED

S

S

D

D

G

G

TO SHT. 4

INSTALL R183FOR FILTER

OUT ONLY


FORNEONATAL

INSTALL

INSTALLFORNEONATAL

DO NOT INSTALLFOR NEONATAL


NOTES:

1. ALL RESISTORS ARE 1/4W 1% U.O.S.

L1,LD3,Q48,R274,RN2,RV19,T1,TP43,U54,Y1.


ADULT = /7MS NEONATAL = /4MS




7-17-017-17-01

GPGP


1011121314


GPGPGP

12-12-0212-12-0212-12-02


5119-00-01 (-03 SCHEMATIC) 15


IVY BIOMEDICAL SYSTEMS INC.

11 BUSINESS PARK DRIVEBRANFORD, CT. 06405(203) 481-4183

D

3 4Tuesday, March 08, 2005

Title


Date: Sheet of

RALALL

RA

LA

LL

LEADS_OFF

ECG

EVENT

L0

L1

NOTCH-

ECG_X1000

G1

G2

G4

16uSEC_SYNC

60/50

SAMPLE

70MS

T2

D

A

A

D

D

D

A

A

A

A

A

A

A

A

A

A

A

A

A

A

AA

A

A

AA

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

I

I

I

I

I I

I

I

I

I

II

I

I

I

I

II

I

II

II

II

I

I II

I

I

I

I

I

II

A

A

I

I

I

I

I

A

+6.5V+5V

+6.5V

+6.5V

+6.5V

+6.5V +5V

+5V

+12V

+5V

+5V

+12V

+6.5V

-8V

+5V

+5V

+5VI

+5VI

+5VI+5VI

+5VI+5VI +5VI

+5V

+5V

+6.5V

+8V

-6.5V

+6.5V

+5VI

+6.5V

+5VI

+12V+5V

-6.5V

-6.5V

-6.5V

-6.5V

-12V

-12V

-12V

-12V

-8V

-6.5V

-5VI

-5VI

-5VI

+5V

-6.5V

-6.5V

-6.5V

-12V

-6.5V

-6.5V

-12V

+8V

+8V

-8V

+5V

+5V

+5VI

-5VI

-8V

+6.5V

+12V

+6.5VI

-6.5VI

-6.5V

-8V

+5V

-8V

+5VI

+12V

-12V

+12V

+8V

+5VI

+5V

LD1NE2HC2A

C84.22UF MP

U42CNY17-3

21

45

C119

150PF NPO

R163100K

U43CNY17-3

21

45

R245

100K

C137220PF

NPO

R22410K

-

+U23A

TL034ACN3

21

411

R22510K

C78

.1UFCER

R22880.6K

U44AICM7556

6

3

5

1

2

4 14

7TR

CV

Q

DIS

THR

R V+

V-

+

-U47A

TL0621

84

3

2

Q43

PN4393

3

1 2

C77

.1UFCER

U44BICM7556

8

11

9

13

12

10

TR

CV

Q

DIS

THR

R

C132

.1UFCER

C116.1UF MP

C133

.1UFCER

D67FDH333

D66FDH333

R121

8.06K

R24650M 5%

R119

10K

R2261M

FB3150013

R23110K

R120

49.9K

FB2150013

R23010K

C139

.1UFCER

FB1150013

C140

.1UFCER

FB4150013

C123

.01UFMP

C144.01UF

CD

C1141UF MP

R118

49.9K

TP43

SHIELDDRIVE

R2594.75M

RV19200K TOP

RATE

+-U23C

TL034ACN

10

98

D72

1N4148

R27310K

REMOVE R273FOR FILTEROUT ONLY

R241

499K

D62

1N4148

R2661M

R27410K

D59

1N4148

C61

1UF MP

+-U46

LT1101CN86

381

27

54

TP37ISOL GND

J208X500

D56

1N4148

R155

100K

R232499K

J204

ECGINPUT

123456

-

+U26C

MC34004P

10

98

-

+U23D

TL034ACN

12

1314Q48

2N5116

D S

G2

13

R227

1M

+

-U47B

TL062

756

JP4

FILTEROUT

FILTERIN

R158

60.4K

D731N4148

D631N4148

R1542M

R24020K

R16616.9K

R23930.1K

R182

100K

R168

105K

R24810K 1W

10%

C92

.0047UF MP

RV12

20K TOPT'HOLD

C67

LD2NE2HC2A

R156200K

U30ACD4538B

2

145

3

6

7

16

8

RC

CX

+T-T

R

Q

Q

VD

VS

R235499K

R181

100 OHM

TP29X1000

U30BCD4538B

14

151211

13

10

9

RC

CX

+T-T

R

Q

Q

Q422N3903

13

2

R249100K

-+U23B

TL034ACN

5

67

C138220PF

NPO

D371N4148

R238

1K

C80.47UF MP

C91.033UF

MP

R177

221 OHM

+ C1316.8UF TANT

Q44

PN4393

3

1 2

R178

210K

C81

680PF NPO

R13730.1K

R18790.9K

RV13

200K TOP60 HZ ADJ.

R159

10K

R179

80.6K

D69FDH333

R160150K

C82.15UF MP

D68FDH333

R146100K

R180

33.2K

R25050M 5%

C71

.033UF 5% MP

R237100K

R138

12.7K

D55

1N4148

R148

178K

R161

3.24M

C98

.1UFCER

R1396.04K

C72

.033UF5% MP

+

-U54A

LT1058ACN32

1

411 D53

1N4148

D421N4148

C129

.1UFCER

R140

2.21K

R164

100K

C99.22UF MP

+

-U54C

LT1058ACN10

98

D54

1N4148

-+U26B

MC34004P

5

67

R141

1K

C130

.1UFCER

D44

1N4148

R220100K

+

-U54D

LT1058ACN12

1314

Q312N3903

1 3

2

R265

1M

R13630.1K

R19230.1K(ADULT)

(NEONATAL) 12.1K

R1624.99K

U41CNY17-3

21

45

RV14

200K TOP50 HZ ADJ.

R251

1M

C83.01UF MP

R247

1M

R197

10K

D431N4148

R145

100K

Q47

2N3903

13

2

Q30

PN4393 3

12

+C121100UF

25V

R26210K

D361N4148

+C120100UF

25V

R20910K

D481N5819

R215402K

R261

10K 1W10%

R21010K

D50

1N5819

+-U26A

MC34004P

3

21

411

C113.01UF

MP

LD3NE2HC2A

D51

1N5819

R214

90.9K

C94

.1UFCER

R260

100K

+

-U39D

MC34004P1213

14

C93

.1UFCER

C143220PF

NPO

R1981K

-

+U39C

MC34004P

109

8

C112

.01UF MP

R207121OHM

Q35

2N3903

13

2

Q45

PN4393

3

1 2

R213

20K

R208374 OHM

D70FDH333

D49

1N4148

R19510K

TP38-5VI

R196

3.32K

D71FDH333

R147

100K

R25850M 5%

TP36+5VI

+C10322UFTANT

R2061K

TP30NOTCH

R202100 OHM

R144

200K

R205

499 OHM

D60

1N4148

+C104100UF25V730MA

D351N4148

R201

499OHM

Q39

2N3906

13

2

D61

1N4148

R14310K

Q36

2N3903

13

2

+C115100UF

25V

Q412N39061

3

2

R21620K

R188330 OHM1/2W 10%

Q28

2N3906

13

2

R233150K

U45CD4052BE

1214151115246

109

13

3

1678

X0X1X2X3

Y0Y1Y2Y3INHAB

X

Y

VD

VE

VS

D52ICL8069CCZR

R134

10K

R23410K

R14233.2K

C122.1UF

CER

R16760.4K

R2111K

Q38

2N390313

2

C124.1UF CER

C65.1UF MP

C85

1UF MP

R212

499 OHM

R170301K

+C127470UF

25V

R264

100K

+C128470UF

25V

D571N4148

TP40+6.5V

-+U24D

MC34004P

12

1314

D581N4148

TP39-6.5V

-

+U24C

MC34004P

10

98

R2631M

R169100K

R267

10K

R171121K

D641N4148

T11029-00-10

1235

6

7 4

D401N6263

C86.022UF

MP

D651N4148

D451N4148

D411N6263

-

+U39B

MC34004P

5

67

Q37IRF522 1

32

C89

.01UFMP

R2032.21K

C126.01UF

MP

D46

1N4148

R243100K

U31ICM7555

2

5

3

7

6

41

8

TR

CV

Q

DIS

THR

RV

-

V+

R172

110KR17310K

C102.001UF

MP

R242100K

C90.022UF

MP

R1896.04K

Q32PN4393

3

21

R175

7.5K

U25DG508A 45671211109

15 16 1 82

1413

3

S1

S2

S3

S4

S5

S6

S7

S8

A2

A1

A0

AO

UT

EN

GNDV+

V-

R223

1K

R176

1M

R19910K

R2221K

Q27

PN4393 3

21

R20010K

Q26

PN4393 3

21

R126

649K (ADULT)130K (NEONATAL)

C66

.047UF MP

C101

150PFNPO

R127

100K

R185402K

R128

100K

R98

1M

Q23PN43933

1 2

D33

1N4148

R99

1M

C95.01UF

MP

D471N4148

L125UH

Q22PN4393

3

1 2

+

-U14A

TL0621

84

3

2

R16510K

RV17

20K TOPECG BAL

C125

1UFMP

+

-U14B

TL062

75

6

R256

402K

R129

1K

R18475K

R10110K

D321N4148

-

+U24A

MC34004P32

1

411

+-U54B

LT1058ACN5

67

R10210K

U38CNY17-3

21

45

R229

49.9K

+-U24B

MC34004P5

67

RV18100K TOP

ECGGAIN

R2361.5K

R257402K

C88

.1UFCER

TP2160/50

TP31T2

R1241.47M

R186162K

C87

.1UFCER

R100

10K

C142

470PFNPO

R20410K

C79

.001UFMP

Q46PN4393

3

12

-+U26D

MC34004P

12

1314

R183100K

R1311M

R157100K

U40IL300G

5

67

81

23

4

U20ICM7555

2

5

3

76

41

8

TR

CV

Q

DIS

THR

RV

-

V+

C691UF MP

R219

100OHM

C63.01UF

CD

TP35T1

R12349.9K

R21810K

Q402N39061

3

2

R130

10K

C64

.1UFCER

C141

1000PF NPO

R19410K

R255

100K

R217

499 OHM

C62.1UF MP

TP42X500

-

+U39A

MC34004P3

21

411

R133

10K

Q34

2N3903

13

2

R2541K

C118

.1UFCER

C70

.0047UF MP

R244

10K 1W10%

R122

301K

R19310K

R25321.5K

D341N4148

C117

.1UFCER

R13210K

R252

22.1OHM

+

C686.8UF

TANT

8

8

7

7

6

6

5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

TO SHT. 3

J201-30

TO SHT. 1

TO SHT. 2

TO SHT. 2

TO SHT. 3

TO SHT. 3

J201-20

TO SHT. 3

J201-2

TO SHT. 2

J201-7

TO SHT. 3

GRAPH

TO SHT. 2

PB1PB2PB3PB4ALARM_ON/OFF2_MIN_PRCDRTEST-MENU

CHASSIS_GND

TO SHT. 2

TO SHT. 1

TO SHT. 1

TO SHT. 2

TO SHT. 1

TO SHT. 3

TO SHT. 1

TO SHT. 1

INSTALL WITHRECORDER OPTION

TO SHT.1

TO SHT. 1

RECORDER OPTIONINSTALL WITH

TO SHT. 3


MOVE____

TRGPD0

TRGPD0


TO SHT. 1


05 REVISED PER ECN 817. GP 8-5-9806 REVISED PER ECN 868. GP 1-25-9907 REVISED PER ECN 934. GP 4-12-9908 REVISED PER ECN 970. GP 8-6-99

TO SHT. 1J201-1

09 GP 11-20-00REVISED PER ECN 1052.

NOTES:

1. ALL RESISTORS ARE 1/4W 1% U.O.S.

L1,LD3,Q48,R274,RN2,RV19,T1,TP43,U54,Y1.



7-17-017-17-01

GPGP


1011121314


GPGPGP

12-12-0212-12-0212-12-02


5119-00-01 (-03 SCHEMATIC) 15


IVY BIOMEDICAL SYSTEMS INC.

11 BUSINESS PARK DRIVEBRANFORD, CT. 06405(203) 481-4183

D

4 4Tuesday, March 08, 2005

Title


Date: Sheet of

A0 D7D0 A1 D6D1 A2 D5D2 A3 D4D3 A4 D3D4 A5 D2D5 A6 D1D6 A7 D0D7 A8

A9RD- A10WRT-A0A1

CS55

D0 A0D1 A1D2 A2D3 A3D4 A4 CST02D5 A5

BEEP D6 A6HONK D7 A7VRTD A8

A9A10A11A12A13A14

WRT-RD-CSRAM

RDBK0 HONKRECSYNC/RDRDY/WRTRDY BEEP

D0D1D2D3D4D5 D0 A6D6 D1 A7D7 D2 A8

D3 A9RECWR D4 A0

/WRTRDY D5 A1D6 A2

RECRES D7 A3RECRD A4/RDRDY BREQ- A5

RECSYNC BACK-RDBK0 A11 D0 A0A0 A12 D1 A1A1 A13 D2 A2A2 A14 D3 A3A3 MREQ- A15 D4 A4A4 RD- D5 A5

WRT- RDY D6 A6 A15D7 A7 A14

A8 A13A9 A12A10 A11A11 A2

CLK A12 A1A13 A0

D1CSROM D0

A10 RD-

A0A1A2A3 D0

WRT- A4 D1 F7RD- A5 D2 F6

A6 D3 F5A7 D4 F4A8 D5 F3A9 D6 F2A10 D7 F1A11 F0A12

INT- A13NMI- A14

A15

D0BREQ- D1BACK- D2

D3D4D5D6D7

D0D1D2D3D4D5D6D7

A0A1

CS54

A[0..15]

D[0..7]

CS

RO

MF7

CS

RA

MF6

D7

CS

T02F5

D6

CS

54F4

D5

CS

55F3

D4

RE

CR

DF2

RE

CW

RF1 F0

BE

EP

HO

NK

VR

TD

RD

BK

0

/WR

TRD

Y/R

DR

DY

RE

CS

YN

CD

3D

2D

1D

0

L0L1

G1G2

G4

LEADS_OFF

T500

NOTCH-

ALERT_AUDIO

ECG_AUDIO

MOVE-

ECG

EVENT

D/A

V_SYNC-

ALERT_OUT

Z

TREND_INT

Z_INT

16uSEC_SYNC

H_SYNC-

R_ENABLE-

T150-

DELTRG

LNFREQ

60/50

+12VREC

AGND

SAMPLE

70MS

T2

TRGOUT

Z_GND

DD

D

D

D

A

A D

A

A

A

A

A

D

D

D

D

D

D

D

D

D

D

D

D

A

D

D

D

D

D

D

D

+5V

+5V

+5V

+5V+5V

+12V

+5V

+5V

+5V

+5V

+12V+5V +8V

+5V

+12VREC

+5V

+5V

-12V

-12V

-12V

+5V

+5V

+5V

+5V

+5V

+8V

+5V

+5V

U29MC1408-8N

56789

101112

133 2

116

4

14

15

A1A2A3A4A5A6A7A8

VC

CV

EE

GN

DRCCMP

IO

VREF+

VREF-

R15315K

R2693.32K

J203

182001

FRONTPANEL

123456789

1011121314

+10000UF 16V

C100

U2774HCT40105

45673219

13121110141516

8

D0

D1

D2

D3

SIN

DIR

OE

RS

T

Q0

Q1

Q2

Q3

DO

RS

O

VC

C

GND

U2874HCT40105

45673219

13121110141516

8

D0

D1

D2

D3

SIN

DIR

OE

RS

T

Q0

Q1

Q2

Q3

DO

RS

O

VC

C

GND

R151

4.99K

R149

100 OHM

R1174.99K

C73.1UF CER

RN110K

21

3 4 5 6 7 8 9 10

C97

.01UFCD

U22AMC34002P

1

84

3

2

U22B

MC34002P

75

6

U32N82C54-2

98765432

26272223

24

101312

181716211920

28

14

D0D1D2D3D4D5D6D7

RDWRA0A1

CS

CLK0G0OUT0

CLK1G1OUT1

CLK2G2OUT2

VCC

GND

U52HM62256LP-12

109876543252421232

2722

1112131516171819

20

261

2814

A0A1A2A3A4A5A6A7A8A9

A10A11A12

WEOE

D0D1D2D3D4D5D6D7

CS1

A13A14

VC

CG

ND

U21ADC0803

1817161514131211

1235

6

7

19

4

9

8

2010

DB0DB1DB2DB3DB4DB5DB6DB7

CSRDWRINTR

VI+

VI-

CLKR

CLK

VREF

AGND

VC

CD

GN

D

C134.1UF CER

U53MK48T02-12

87654321

2322

212018

171615141311109

2412

19


W-G-E-

DQ7DQ6DQ5DQ4DQ3DQ2DQ1DQ0

VC

CG

ND

A10

SOCKET28 PIN

Y1MX045T2C8M7

14

8

GN

D+5V

DC FO OUTC74

.1UFCER

U49

2366-01-04FOR 101R2367-01-04FOR 101NR

(330043)

987654325242123226

2022271

1112131516171819

2814

10A1A2A3A4A5A6A7A8A9

A10A11A12A13

CEOE

PGMVPP

O0O1O2O3O4O5O6O7

VC

CG

ND

A0

R1163.01K

C60.001UF

MP

R103

4.99KQ242N3903

13

2

D30

1N4148

R714.99K JP1

TM

STD

U35Z84C1008

3938373635333231

171615

301114109

414240

8

754321444326252423222120192718

12

1334

D0D1D2D3D4D5D6D7

BUSREQBAIBAO

M1IORQMREQRDWR

INT/PULSEIEIIEO

CLK


A10A11A12A13A14A15

RDYCE/WAIT

/RES

VC

CG

ND

U5171055C-10

343332313029282753698356

4321

403938371819202122232425

1415161713121110

267

D0D1D2D3D4D5D6D7

RDWRA0A1

RESETCS

PA0PA1PA2PA3PA4PA5PA6PA7

PB0PB1PB2PB3PB4PB5PB6PB7

PC0PC1PC2PC3PC4PC5PC6PC7

VC

CG

ND

C136

.1UFCER C105

.1UFCER

RN21K

21

3 4 5 6 7 8 9 10

D381N6263

D391N6263

C106.1UF

CER

C135.1UF

CER

R125

1K

TP34RESET_____

C111.1UF

CER

C57.1UF

CER

C110.1UF

CER

U48Z84C008

303132333435363738394012345

1415128791013

27

19202221

28

1824

161726

25236

1129


A10A11A12A13A14A15

D0D1D2D3D4D5D6D7

M1

MREQIORQWRRD

REFSH

HALT

WAIT

INTNMI

RESET

BUSRQBUSAK

CLK

VC

CV

SS

C109.1UF

CER

C107

.1UFCER

C108.1UF

CER

GRG_GUUU36

2452-00-04(330093)

269797475

6735044

291

7010

5548

58 83 12 9 81 62 54 77 15 16 17 64 68 65 52 60 51 67

71

462018

40 41 39 37 36 33 30 23 14 24

4921

34

76 80 25 27 5

28

84 35

313263843536678

719324247597282

31

4

8

11

4556

57

61

63 22

A15A14A13A12A11

A1A0D1D0

/WRT/RD/MREQ/BACK

8MHZ22

FD7

FD6

FD5

FD4

FD3

FD2

FD1

FD0

DTA

D8

DTA

D7

/RD

FIF

/UN

LFIF

/ZO

UT

/VS

YN

CR

EIN

TEN

EV

NT

/MO

VE

25

/HSYNC

FLD21

BEEPOTHONKOT

CS

RO

MC

SR

AM

CS

T02

CS

54C

S55

RE

CR

DR

EC

WR

BE

EP

HO

NK

VR

TD

INTRPTNMI

ADCS

RD

BK

0R

DB

K1

/WR

TRD

Y/R

DR

DY

RE

CS

YN

C

EVENT

PIN

001

PIN

002

VCCVCCVCCVCCVCCVCCVCCVCC

GNDGNDGNDGNDGNDGNDGNDGND

/RD

Y

60HZ

LDOFF

/TM

OT

/4MS70MS

/10MS

/PRINT

A2 SAMPLE

C75680PFSM

R150475 OHM

RECORDER INTERFACEJ205

202002

123456789

10111213141516171819202122232425

26272829303132333435363738394041424344454647484950

1A2A3A4A5A6A7A8A9A10A11A12A13A14A15A16A17A18A19A20A21A22A23A24A25A

1B2B3B4B5B6B7B8B9B

10B11B12B13B14B15B16B17B18B19B20B21B22B23B24B50B

R1744.75K

R9410K

U33MAX690CPA

4 6

2

1 5 7

3

8

PFI

WD

I

VCC

VO

PFO R

S

GND

VB

R9310K

Q29

2N3903

13

2 R115

20K

TP28EVENT

TP25DELTRG

TP33TRGPD0

TP27CLK

TP41INTR____

SOCKET44 PIN

TP26SAMPLE

SOCKET84 PIN

TP16Z

SOCKET28 PIN

U34B74HCT74

12

11

9

8

1013

14D

CLK

Q

Q

PR

CL

PG

TP3216US

C96.1UF

CER

R221

10K

Q332N3903

13

2

R19110K

U34A74HCT74

2

3

5

6

41

7

D

CLK

Q

Q

PR

CL

PG

U15LM318

3

265

18

74

R1529.09K

R270

150 OHM

R19049.9K

+ C766.8UFTANT

R268150 OHM

Documents

101-ServiceManual.pdf