KB-6015KS KB-6015KK KB-6015KW SERVICE MANUAL

1

KB-6015KSKB-6015KKKB-6015KW

In the interest of user-safety the unit should be restored to its original condition and only parts identical to those specifiedshould be used.

WARNING TO SERVICE PERSONNEL:This service manual is intended for use by persons having electrical and mechanical training and a level ofknowledge of these subjects generally considered acceptable in the appliance repair trade. Sharp ElectronicsCorporation cannot be responsible, nor assume any liability, for injury or damage of any kind arising from theuse of this manual.

Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with thefollowing parts may result in a severe, possibly fatal, electrical shock. (High Voltage Capacitor, High VoltagePower Transformer, High Voltage Rectifier and Heat sink etc., and Magnetron, High Voltage Harness etc..)

S25M246KB6015


MICROWAVE DRAWER

MODELS

SERVICE MANUAL

TABLE OF CONTENTSPage

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TOAVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ................... INSIDE FRONT COVERBEFORE SERVICING ...................................................................................................... INSIDE FRONT COVERWARNING TO SERVICE PERSONNEL ............................................................................................................... 1MICROWAVE MEASUREMENT PROCEDURE .....................................................................................................2FOREWORD AND WARNING ................................................................................................................................3PRODUCT SPECIFICATIONS ...............................................................................................................................4SCHEMATICS .......................................................................................................................................................8TEST PROCEDURES............................................................................................................................................9TOUCH CONTROL PANEL ASSEMBLY ............................................................................................................. 17MICROWAVE DRAWER DISASSEMBLY............................................................................................................ 25WIRING DIAGRAMS ........................................................................................................................................... 31PRINTED WIRING BOARDS ............................................................................................................................... 32PARTS LIST ........................................................................................................................................................ 36PACKING AND ACCESSORIES ......................................................................................................................... 40

This document has been published to be used for after sales service only. The contents are subject to change without notice.SHARP ELECTRONICS CORPORATION

KB-6015KS pictured

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PRECAUTIONS TO BE OBSERVED BEFORE AND DUR-ING SERVICING TO AVOID POSSIBLE EXPOSURE TOEXCESSIVE MICROWAVE ENERGY(a) Do not operate or allow the oven to be operated with the door open.(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave

source, and make repairs as necessary: (1) interlock operation, (2) proper door closing, (3) seal and sealing surfaces(arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5) evidence of dropping orabuse.

(c) Before turning on microwave power for any service test or inspection within the microwave generatingcompartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity,and connections.

(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation andtransmission systems shall be repaired, replaced, or adjusted by procedures described in this manual beforethe oven is released to the owner.

(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be performedon each oven prior to release to the owner.

BEFORE SERVICINGBefore servicing an operative unit, perform a microwave emission check as per the Microwave Measure-ment Procedure outlined in this service manual.If microwave emissions level is in excess of the specified limit, contact SHARP ELECTRONICSCORPORATION immediately @1-800-237-4277.

If the unit operates with the door open, service person should 1) tell the user not to operate the oven and2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administration's Center forDevices and Radiological Health immediately.

Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit found withemissions in excess of 4mW/cm2. The owner of the unit should be instructed not to use the unit until theoven has been brought into compliance.

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WARNING TO SERVICE PERSONNEL

Range units contain circuitry capable of producing very high voltage and current, contactwith following parts may result in a severe, possibly fatal, electrical shock.

(Example)High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High VoltageRectifier Assembly, High Voltage Harness, Heating Elements, etc..Read the Service Manual carefully and follow all instructions.

Before Servicing

1. Disconnect the power supply cord , and thenremove cabinet.

2. Open the drawer and keep it open.3. Discharge high voltage capacitor.

WARNING: RISK OF ELECTRIC SHOCK. DISCHARGE THE HIGH-VOLTAGE CAPACITOR BEFORESERVICING.

The high-voltage capacitor remains charged about 60seconds after the oven has been switched off. Wait for 60seconds and then short-circuit the connection of the high-voltage capacitor (that is the connecting lead of the high-voltage rectifier) against the chassis with the use of aninsulated screwdriver.

Whenever troubleshooting is performed the power supplymust be disconnected. It may, in some cases, be necessaryto connect the power supply after the outer case has beenremoved, in this event:1. Disconnect the power supply cord, and then remove

neccessary covers.2. Open the drawer and keep it open.3. Discharge high voltage capacitor.4. Disconnect the leads to the primary of the power

transformer.5. Ensure that the leads remain isolated from other

components and oven chassis by using insulation tape.6. After that procedure, reconnect the power supply cord.

When the testing is completed,1. Disconnect the power supply cord, and then remove

covers.2. Open the drawer and keep it open.3. Discharge high voltage capacitor.4. Reconnect the leads to the primary of the power

transformer.5. Reinstall the covers.6. Reconnect the power supply cord.7. Run the unit and check all functions.

After repairing

1. Reconnect all leads removed from components duringtesting.

2. Reinstall the covers.3. Reconnect the power supply cord.4. Run the oven and check all functions.

Microwave ovens should not be operated empty. To test forthe presence of microwave energy within a cavity, place acup of cold water on the oven tray, close the drawer and setthe power to HIGH and set the microwave timer for two (2)minutes. When the two minutes has elapsed (timer at zero)carefully check that the water is now hot. If the water remainscold carry out Before Servicing procedure and re-examinethe connections to the component being tested.

When all service work is completed and the oven is fullyassembled, the microwave power output should be checkedand a microwave leakage test should be carried out.

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MICROWAVE MEASUREMENT PROCEDURE

A. Requirements:

1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave ovenshould not exceed 1mW/cm2 at any point 5cm or more from the external surface of the oven, measured prior to acquisitionby a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2 at any point 5cm or more from the externalsurface of the oven.

2) Safety interlock switches:Primary interlock relay switch shall prevent microwave radiation emission in excess of the requirement as abovementioned. Secondary interlock relay and door sensing switch shall prevent microwave radiation emission in excess of5 mW/cm2 at any point 5cm or more from the external surface of the oven.

B. Preparation for testing:Before beginning the actual measurement of leakage, proceed as follows:1) Make sure that the actual instrument is operating normally as specified in its instruction booklet.

Important:Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard formicrowave ovens, 21 CFR 1030.10(c)(3)(i), must be used for testing.

2) Place the load of 275±15 ml (9.8 oz) of tap water initially at 20±5O

C (68OF) in the center of the oven cavity.The water container shall be a low form of 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm (3-1/2 in.) andmade of an electrically nonconductive material such as glass or plastic.The placing of this standard load in the oven is important not only to protect the oven, but also to insure that any leakageis measured accurately.

3) Set the cooking control on Full Power Cooking Mode.4) Close the drawer and select a cook cycle of several minutes. If the water begins to boil before the survey is completed,

replace it with 275 ml of cool water.

C. Leakage test:

Closed-drawer leakage test (microwave measurement):1) Grasp the probe of the survey instrument and hold it perpendicular to the gap between the drawer and the body of the

oven.2) Move the probe slowly, not faster than 1 in./sec. (2.5 cm/sec.) along the gap, watching for the maximum indication on the

meter.3) Check for leakage at the drawer screen, sheet metal seams and other accessible positions where the continuity of the

metal has been breached (eg., around the switches, indicator, and vents).While testing for leakage around the drawer, pull the drawer away from the front of the oven as far as is permitted by theclosed latch assembly.

4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW/cm2,and that the primary interlock switch/secondary interlock relay does turn the oven OFF before any door movement.

NOTE: After servicing, record data on service invoice and microwave leakage report.

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SHARP ELECTRONICS CORPORATION

SHARP PLAZA, MAHWAH,NEW JERSEY 07430-2135

SERVICE MANUAL

MICROWAVE DRAWER

KB-6015KSKB-6015KK / KB-6015KW

FOREWORD

This Manual has been prepared to provide Sharp Electronics Corp.Service Personnel and Service Information for the MICROWAVEDRAWER, KB-6015KS, KB-6015KK, and KB-6015KW.

It is recommended that service personnel carefully study the entire textof this manual so that they will be qualified to render satisfactorycustomer service.

Check the interlock switches and the door seal carefully. Specialattention should be given to avoid electrical shock and microwaveradiation hazard.

WARNING

Never operate the oven until the following points are ensured.(A) The door is tightly closed.(B) The door brackets and hinges are not defective.(C) The door packing is not damaged.(D) The door is not deformed or warped.(E) There is not any other visible damage with the oven.

Servicing and repair work must be carried out only by trained servicepersonnel.

DANGERCertain initial parts are intentionally not grounded and presenta risk of electrical shock only during servicing. Servicepersonnel - Do not contact the following parts while theappliance is energized;High Voltage Capacitor, Power Transformer, Magnetron, HighVoltage Rectifier Assembly, High Voltage Harness;If provided, Vent Hood, Fan assembly, Cooling Fan Motor.

All the parts marked “*” on parts list are used at voltages more than250V.

Removal of the outer wrap gives access to voltage above 250V.

All the parts marked “ ” on parts list may cause undue microwaveexposure, by themselves, or when they are damaged, loosened orremoved.

PRODUCT DESCRIPTION

SCHEMATICS

TEST PROCEDURE

TOUCH CONTROL PANEL

MICROWAVE DRAWERDISSASSEMBLY ANDADJUSTMENT PROCEDURE

WIRING DIAGRAM

PARTS LIST

Δ

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ITEM DESCRIPTIONPower Requirments 120 Volts

14.5 Amperes, 1000 watts60 HzSingle phase, 3 wire grounded

Power Output 1000 watts (IEC TEST PROCEDURE)Operating frequency of 2450MHz

Cooking Cavity Dimensions Width 17-11/32Height 5-7/8"

1.0 Cubic Feet Depth 17-1/8"

Case Dimensions Width 30"Height 15-9/32"Depth 26-1/16"

Control Complement Touch Control SystemClock ( 1:00 - 12:59 )Timer (0 - 99 min. 99 seconds)

Microwave Power for Variable Cooking

Repetition Rate;P-HI ................................................. Full power throughout the cooking timeP-90 .................................................................... approx. 90% of Full PowerP-80 .................................................................... approx. 80% of Full PowerP-70 .................................................................... approx. 70% of Full PowerP-60 .................................................................... approx. 60% of Full PowerP-50 .................................................................... approx. 50% of Full PowerP-40 .................................................................... approx. 40% of Full PowerP-30 .................................................................... approx. 30% of Full PowerP-20 .................................................................... approx. 20% of Full PowerP-10 .................................................................... approx. 10% of Full PowerP-0 .....................................................No power throughout the cooking time

START/MINUTE PLUS pad, Defrost pad, Number selection pad, Micro-warmpad, Power Level pad, Timer/Clock pad,Stop/Clear pad, Sensor Reheat, SensorPopcorn, Sensor Cook, Open pad, Close pad, Setup/Custom Help, On/Off,Cotrol Lock, Reheat.

Oven Cavity Light Yes

Safety Standard UL Listed FCC Authorized

DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J

MICROWAVE DRAWER SPECIFICATION

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KB-6015KS

GENERAL INFORMATION

GROUNDING INSTRUCTIONS

This oven is equipped with a three prong grounding plug. It must be plugged into a wall receptacle that is properly installedand grounded in accordance with the National Electrical Code and local codes and ordinances.In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the electriccurrent.

WARNING: Improper use of the grounding plug can result in a risk of electric shock.

Electrical RequirementsThe electrical requirements are a 120 volt 60 Hz, AC only, 15 or 20 amp. fused electrical supply. It is recommended that aseparate circuit serving only this appliance be provided. When installing this appliance, observe all applicable codes andordinances.

Where a two-pronged wall-receptacle is encountered, it is the personal responsibility and obligation of the customer tocontacta qualified electrician and have it replaced with a properly grounded three-pronged wall receptacle or have a groundingadapter properly grounded and polarized. If the extension cord must be used, it should be a 3-wire, 15 amp. or higher ratedcord. Do not drape over a countertop or table where it can be pulled on by children or tripped over accidentally.

CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE ROUND GROUNDING PRONG FROMTHIS PLUG.

NOTE:The directed features are disabled after one minute when the oven is not in use. These features are automatically enabledwhen the door is opened and closed or the STOP/ CLEAR pad is pressed.

3-ProngedPlug

GroundedReceptacle Box

Grounding Pin

3-Pronged Receptacle

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OPERATION

DESCRIPTION OF OPERATING SEQUENCE

The following is a description of component functions duringoven operation.

OFF CONDITIONClosing the drawer activates the door sensing switch andsecondary interlock switch. (In this condition, the monitorswitch contacts are opened.)When oven is plugged in, 120 volts A.C. is supplied to thecontrol unit. (Page 8).1. The display will show flashing "Enjoy Your Drawer

Touch Clear and Touch Clock".To set any program or set the clock, you must first touchthe STOP/CLEAR pad. The display will clear, and " : "will appear.

COOKING CONDITIONProgram desired cooking time by touching the NUMBERpads. Program the power level by touching the POWERLEVEL pad and then a Number pad.When the START pad is touched, the following operationsoccur:

1. The contacts of relays are closed and componentsconnected to the relays are turned on as follows.(For details, refer to Page 8)

RELAY CONNECTED COMPONENTS

RY-1 oven lamp/stir fan motor/fan motor

RY-2 power transformer

2. 120 volts A.C. is supplied to the primary winding of thepower transformer and is converted to about 3.3 voltsA.C. output on the filament winding, and approximately2370 volts A.C. on the high voltage winding.

3. The filament winding voltage heats the magnetron filamentand the H.V. winding voltage is sent to a voltage doublercircuit.

4. The microwave energy produced by the magnetron ischannelled through the waveguide into the cavity feed-box, and then into the cavity where the food is placed tobe cooked.

5. Upon completion of the cooking time, the powertransformer, oven lamp, etc. are turned off, and thegeneration of microwave energy is stopped. The ovenwill revert to the OFF condition.

6. When the drawer is opened during a cook cycle, themonitor switch, door sensing switch, secondary interlockswitch, relay (RY1) and secondary interlock relay areactivated with the following results. The circuits to the stirfan motor, the cooling fan motor, and the high voltagecomponents are de-energized, the oven lamp remainson, and the digital read-out displays the time still remainingin the cook cycle when the door was opened.

7. The monitor switch electrically monitors the operation of

the secondary interlock switch and secondary interlockrelay and is mechanically associated with the drawer sothat it will function in the following sequence.

(1) When the drawer opens from the closed position, thesecondary interlock relay (RY2) and secondary interlockswitch open their contacts. And contacts of the relay(RY1) remains closed. Then the monitor switch contactsclose.

(2) When the drawer is closed from the open position, themonitor switch contacts open first. Then the contacts ofthe secondary interlock switch and door sensing switchclose. And contacts of the relay (RY1) open.

If the secondary interlock switch and secondary interlockrelay (RY2) fail with the contacts closed when the drawer isopened, the closing of the monitor switch contacts will forma short circuit through the fuse, secondary interlock switch,relay (RY1) and secondary interlock relay (RY2), causingthe fuse to blow.

POWER LEVEL P-0 TO P-90 COOKINGWhen Variable Cooking Power is programmed, the 120 voltsA.C. is supplied to the power transformer intermittentlythrough the contacts of relay (RY-2) which is operated by thecontrol unit within a 32 second time base. Microwave poweroperation is as follows:

VARI-MODE ON TIME OFF TIME

Power 10(P-HI) 32 sec. 0 sec.(100% power)Power 9(P-90) 30 sec. 2 sec.(approx. 90% power)Power 8(P-80) 26 sec. 6 sec.(approx. 80% power)Power 7(P-70) 24 sec. 8 sec.(approx. 70% power)Power 6(P-60) 22 sec. 10 sec.(approx. 60% power)Power 5(P-50) 18 sec. 14 sec.(approx. 50% power)Power 4(P-40) 16 sec. 16 sec.(approx. 40% power)Power 3(P-30) 12 sec. 20 sec.(approx. 30% power)Power 2(P-20) 8 sec. 24 sec.(approx. 20% power)Power 1(P-10) 6 sec. 26 sec.(approx. 10% power)Power 0(P-0) 0 sec. 32 sec.(0% power)

Note: The ON/OFF time ratio does not correspond with thepercentage of microwave power, because approx. 2seconds are needed for heating of the magnetronfilament.

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SENSOR COOKING CONDITIONUsing the SENSOR function, food is cooked without figuringtime, power level or quantity. When the oven senses enoughsteam from the food, it relays the information to itsmicroprocessor which will calculate the remaining cookingtime and power level needed for best results. When the foodis cooked, water vapor is developed. the sensor "senses"the vapor and its resistance increase gradually. When theresistance reaches the value set according to the menu,supplementary cooking is started.The time of supplementary cooking is determined by experi-ment with each food category and inputted into the LSI. Anexample of how sensor works: (Potatoes)

1. Potatoes at room temperature. Vapor is emitted veryslowly.

MICROWAVE

2.Heat Potatoes. Moisture and humidity is emitted veryrapidly. You can smell the aroma as it cooks.

MICROWAVEAH SENSOR

3.Sensor detects moisture and humidity and calculatescooking time and variable power.

Cooking Sequence.1. Touch one of the SENSOR pads.

NOTE: The oven should not be operated on sensor immediately after plugging in the unit. Wait two minutes before cooking on SENSOR.

2. The coil of shut-off relay (RY-1) is energized, but thepower transformer is not turned on.

3. After about 16 seconds, the cook relay (RY-2) isenergized. The power transformer is turned on,microwave energy is produced and first stage is started.The 16 seconds is the cooling time required to removeany vapor from the oven cavity and sensor.

NOTE: During this first stage, do not open the drawer ortouch STOP/CLEAR pad.

4. When the sensor detects the vapor emitted from thefood, the display switches over to the remaining cookingtime and the timer counts down to zero.At this time, the drawer may be opened to stir, turn orseason food.

5. When the timer reaches zero, an audible signal sounds.The shut-off relay and cook relay are de-energized andthe power transformer, oven lamp, etc. are turned off.

6. Opening the drawer or touching the STOP/CLEAR pad,the time of the day will reappear on the display and theoven will revert to an OFF condition. When the timerreaches zero, an audible signal sounds.

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RESISTOR 470 kΩ 1/2W

LINE CROSS CAPACITOR 1.0 μF 275V

LINE BYPASS CAPACITOR0.0033 μF 250V

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KB-6015KSKB-6015KKKB-6015KWTEST PROCEDURES

PROCEDURELETTER COMPONENT TEST

The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore,unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeterand ohmmeter.In this service manual, the touch control panel assembly is divided into three units, Control Unit andKeyboard Unit and Power Unit, and troubleshooting by unit replacement is described according to thesymptoms indicated.Before testing,

1) Disconnect the power supply cord, and then disassemble as per "MICROWAVE DRAWERDISASSEMBLY" page 25.

2) Open the drawer and block it open.3) Discharge high voltage capacitor.4) Disconnect the leads to the primary of the power transformer.5) Ensure that these leads remain isolated from other components and oven chassis by using

insulation tape.1. Keyboard Unit.

NOTE ;1) Check Keyboard unit connection before replacement.2) Reconnect all leads removed from components during testing.3) Re-install the covers.4) Reconnect the power supply cord after the covers are installed.5) Run the oven and check all functions.

The following symptoms indicate a defective keyboard unit.a) When touching the pads, a certain pad produces no signal at all.b) When touching a number pad, two figures or more are displayed.c) When touching the pads, sometimes a pad produces no signal.If the Keyboard unit is defective.1) Disconnect the power supply cord, and then remove covers.2) Open the drawer and block it open.3) Discharge high voltage capacitor.4) Replace the Keyboard unit.5) Reconnect all leads removed from components during testing.6) Re-install the covers.7) Reconnect the power supply cord after the covers are installed.8) Run the oven and check all functions.

2. Control UnitThe following symptoms indicate a defective control unit. Before replacing the control unit, performthe Keyboard unit test (Procedure B) to determine if control unit is faulty.

2-1 In connection with indicatorsa) At a certain digit, all or some segments do not light up.b) At a certain digit, brightness is low.c) Only one indicator does not light.d) The corresponding segments of all digits do not light up; or they continue to light up.e) Wrong figure appears.f) A certain group of indicators do not light up.g) The figure of all digits flicker.

2-2 Other possible problems caused by defective control unit.a) Buzzer does not sound or continues to sound.b) Clock does not operate properly.c) Cooking is not possible.

3. Power Unit or Touch Control Transformera) Fan motor, stirrer motor, oven lamp or electrical parts do not turn on or do not turn off.b) Digital display on the control unit does not show anything.

When testing is completed,1) Disconnect the power supply cord, and then disassemble as per "MICROWAVE DRAWER

DISASSEMBLY" page 25.2) Open the drawer and block it open.3) Discharge high voltage capacitor.

A TOUCH CONTROL PANEL ASSEMBLY TEST

10


C RELAY TEST

4) Reconnect all leads removed from components during testing.5) Re-install the covers.6) Reconnect the power supply cord after the covers are installed.7) Run the oven and check all functions.

TEST PROCEDURES


B KEY UNIT TEST

1. Disconnect the power supply cord, and then remove outer case.2. Open the drawer and block it open.3. Discharge high voltage capacitor.4. If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable

is making good contact, verify that the door sensing switch (stop switch) operates properly; that is thecontacts are closed when the drawer is closed and open when thedrawer is open. If the door sensing switch (stop switch) is good,disconnect the flat ribbon cable that connects the key unit to thecontrol unit and make sure the drawer sensing switch is closed(either close the drawer or short the door sensing switch connecter).Use the Key unit matrix indicated on the control panel schematicand place a jumper wire between the pins that correspond to theSTOP/CLEAR pad making momentary contact. If the control unitresponds by clearing with a beep the key unit is faulty and must bereplaced. If the control unit does not respond, it is faulty and mustbe replaced. If a specific pad does not respond, the above methodmay be used (after clearing the control unit) to determine if thecontrol unit or key pad is at fault.

5. Reconnect all leads removed from components during testing.6. Re-install the outer case (cabinet).7. Reconnect the power supply cord after the outer case is installed.8. Run the oven and check all functions.

STOP/CLEAR

REHEAT

6

START/MINUTEPLUS

1

2

7

SENSORCOOK

SENSORREHEAT

DEFROST

9

8

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OPEN

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KEEPWARM

TIMERCLOCK

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J-1J-2J-3J-4

J-5

J-6

J-7

J-8

J-9

J-12

J-11

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<KEY UNIT>CN-J

1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Discharge high voltage capacitor.4. Disconnect the leads to the primary of the power transformer.5. Ensure that these leads remain isolated from other components and oven chassis by using insulation tape.6. After that procedure, re-connect the power supply cord.7. Remove the outer case and check voltage between Pin Nos. 5 and 7 of the 4 pin connector (CN-A)

on the power unit with an A.C. voltmeter.The meter should indicate 120 volts, if not check oven circuit.

RY1, RY2, RY3 and RY4 Relay TestThese relays are operated by D.C. voltageCheck voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.DC. voltage indicated .................... Defective relay.DC. voltage not indicated ............... Check diode which is connected to the relay coil. If diode is good,

control unit is defective.

RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS

RY1 Approx. 26V D.C. Oven lamp / Common

RY2 Approx. 25V D.C. Power transformer

RY3 Approx. 26V D.C. Stirrer motor

RY4 Approx. 26V D.C. Fan motor

RY5 Approx. 26V D.C. Switching regurator for drawer motor

8.Disconnect the power supply cord, and then remove outer case. 9.Open the door and block it open.10.Discharge high voltage capacitor.11.Reconnect all leads removed from components during testing.

11


WARNING : The oven should be fully assembled before following procedure.(1) Place one cup of water in the center of the tray in the oven cavity.(2) Close the drawer, touch the Defrost pad. Then select Steaks/Chops by touching the number pad 2.

And touch the number pad 5. (Now, weight 0.5lb is set.) And then touch the start pad.(3) The oven is in Defrost cooking condition.(4) The oven will operate as follows

WEIGHT 1ST STAGE 2ND STAGE 3RD. STAGELEVEL TIME LEVEL TIME LEVEL TIME

0.5lb 60% 20sec. 40% 20sec. 30% 45sec.

(5) If improper operation is indicated, the control unit is probably defective and should be checked.

D DEFROST TEST

E PROCEDURES TO BE TAKEN WHEN THE FUSE ON THE PRINTED WIRING BOARD (PWB) ISOPEN.

12.Re-install the outer case (cabinet).13.Reconnect the power supply cord after the outer case is installed.14.Run the oven and check all function.

To protect the electronic circuits, this model is provided with a fuse added to the primary on the PWB.1. Fuse check and repairs.

1) Disconnect the power supply cord.2) Remove the outer case cabinet.3) Open the door and block it open.4) Discharge high voltage capacitor.5) If the Fuse is blown, replace power unit.6) Make a visual inspection of the varistor. Check for burned damage. If the varistor has been burned,

replace the power unit.7) Examine the touch control transformer with a tester for the presence of layer short-circuit (check

the primary coil resistance which is approximately 151.6Ω ± 10%). If any abnormal condition isdetected, replace the touch control transformer.

8) Reconnect all leads removed from components during testing.9) Re-install the outer case (cabinet).

10) Reconnect the power supply cord after the outer case is installed.11) Run the oven and check all functions.

2. Follow the troubleshooting guide given below, if indicator does not light up after above check andrepairs are finished.1) Disconnect the power supply cord.2) Remove the outer case cabinet.3) Open the door and block it open.4) Discharge high voltage capacitor.5) Disconnect the leads to the primary of the power transformer.6) Ensure that these leads remain isolated from other components and oven chassis by using

insulation tape.7) After that procedure, re-connect the power supply cord.8) Follow the troubleshooting guide given below for repair.

STEPS OCCURRENCE CAUSE OR CORRECTION

1 The rated AC voltage is not present between Check supply voltage and oven power cord.Pin Nos. 5 and 7 of the 4-pin connecter (CN-A).

2 The rated AC voltage is present at primary Touch control transformer or secondary circuit defective.side of touch control transformer. Check and replace touch control transformer or power unit .

9) Disconnect the power supply cord, and then remove outer case.10) Open the door and block it open.

TEST PROCEDURES


12


Checking the initial sensor cooking conditionWARNING : The oven should be fully assembled before following procedure.(1) The oven should be plugged in at least two minutes before sensor cooking.(2) Room temperature should not exceed 95οF (35οC).(3) The unit should not be installed in any area where heat and steam are generated. The unit should not be

installed, for example, next to a conventional surface unit. Refer to the “INSTALLATION INSTRUCTIONS”of the operation manual.

(4) Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity. To permitadequate ventilation, be sure to install so as not to block these vents. There should be some space forair circulation.

(5) Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any moisturewith a dry cloth or paper towel.

(6) The Sensor works with food at normal storage temperature. For example, chicken pieces would be atrefrigerator temperature and canned soup at room temperature.

(7) Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The sensorwill detect the vapor given of by the spray and turn off before food is properly cooked.

(8) If the sensor has not detected the vapor of the food, ERROR will appear and the oven will shut off.

Water load cooking testWARNING : The oven should be fully assembled before following procedure.Make sure the oven has been plugged in at least two minutes before checking sensor cook operation. Thecabinet should be installed and screws tightened.(1) Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.(2) Place the container on the center of tray in the oven cavity.(3) Close the drawer.(4) Touch the TIMER/CLOCK pad once, the POWER LEVEL pad twice and the START pad once. And touch

the number pads 1 once and the number pad 4 once. Now, the oven is in the sensor cooking condition,and "AH20" and "ON" will appear in the display.

(5) The oven will operate for the first 16 seconds, without generating microwave energy.NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage of sensor

cooking.(6) After approximately 16 seconds, microwave energy is produced.If ERROR is displayed or the oven does not turn off, replace the AH sensor or check the control unit, refer toexplanation below. If the oven stops after 5 minutes and no ERROR code is displayed, then the AH sensoris normal. Check other parts except the AH sensor.

TESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT

To determine if the sensor is defective, the simplest method is to replace it with a new replacement sensor.(1) Disconnect the power supply cord, and then disassemble as per "MICROWAVE DRAWER

DISASSEMBLY" page 25.(2) Open the drawer and block it open.(3) Discharge high voltage capacitor.(4) Remove the AH sensor.(5) Install the new AH sensor.(6) Reconnect all leads removed from components during testing.(7) Re-install the covers.(8) Reconnect the power supply cord after the covers are installed.(9) Reconnect the oven to the power supply and check the sensor cook operation as follows:

9-1. Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.

F AH SENSOR TEST

11) Discharge high voltage capacitor.12) Reconnect all leads removed from components during testing.13) Re-install the outer case (cabinet).14) Reconnect the power supply cord after the outer case is installed.15) Run the oven and check all functions.

TEST PROCEDURES

PROCEDURELETTER

COMPONENT TEST

13


TEST PROCEDURES


9-2. Place the container on the center of tray in the oven cavity.9-3. Close the drawer.9-4. Touch the TIMER/CLOCK pad once, the POWER LEVEL pad twice and the START pad once. And

touch the number pads 1 once and the number pad 4 once.9-5. The control panel is in automatic Sensor operation.9-6. The oven turns off automatically, and the time for detecting moisture will be displayed.

If new sensor does not operate properly, the problem is with the control unit, and refer to explanation below.

CHECKING CONTROL UNIT

(1) Disconnect the power supply cord, and then disassemble as per "MICROWAVE DRAWERDISASSEMBLY" page 25.

(2) Open the drawer and block it open.(3) Discharge high voltage capacitor.(4) Disconnect the sensor connector that is mounted to control panel.(5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.(6) Disconnect the leads to the primary of the power transformer.(7) Ensure that these leads remain isolated from other components and oven chassis by using insulation tape.(8) After that procedure, re-connect the power supply cord.(9) Check the sensor cook operation proceed as follows:

9-1. Close the door. Touch the TIMER/CLOCK pad once, the POWER LEVEL pad twice and the STARTpad once. And touch the number pads 1 once and the number pad 4 once.

9-2. The control panel is in the sensor cooking operation.9-3. After approximately 25 seconds, push plunger of select switch for more than 3 seconds. This

condition is same as judgement by AH sensor.9-4. After approximately 3 seconds, the display shows “ X X . X X “ which is the time for detecting moisture.

If the above is not the case, the control unit is probably defective.If the above is proper, the AH sensor is probably defective.

(10) Disconnect the power supply cord, and then remove covers.(11) Open the drawer and block it open.(12) Discharge high voltage capacitor.(13) Disconnect the dummy resistor circuit from the sensor connector of control panel.(14) Carry out necessary repair.(15) Reconnect all leads removed from components during testing and repairing.(16) Re-install the covers.(17) Reconnect the power supply cord after the outer case is installed. Run the oven and check all functions.(18) Carry out "Water load cooking test" again and ensure that the oven works properly.

R1, R2 : 22ΩΩΩΩΩ ± 1% 1/2WR3 : 4.3kΩΩΩΩΩ ± 5% 1/4WR4 : 1MΩΩΩΩΩ ± 5% 1/4W

Sensor Dummy Resistor Circuit

Plunger

NC

NO

COM

COM NO

NCR3 R4

R1

R2

1

2

3

F-1

F-2

F-3

To connector (F)on Control Unit.

CONNECTOR

14


1. Disconnect the power supply cord.2. Open the drawer and keep it open.3. To discharge high voltage capacitor, wait for 60 seconds.4. To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check across

the magnetron filament leads should indicate less than 1 ohm.5. To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads and

chassis ground. This test should indicate an infinite resistance. If there is little or no resistance themagnetron is grounded and must be replaced.

6. Reconnect all leads removed from components during testing.7. Reassemble the unit.8. Reconnect the power supply cord.9. Run the oven and check all functions.

MICROWAVE OUTPUT POWERThe following test procedure should be carried out with the microwave oven in a fully assembled condition.

HIGH VOLTAGES ARE PRESENT DURING THE COOK CYCLE, SO EXTREME CAUTION SHOULD BEOBSERVED.

Power output of the magnetron can be measured by performing a water temperature rise test. This test shouldonly be used if above tests do not indicate a faulty magnetron and there is no defect in the followingcomponents or wiring: inverter unit. This test will require a 16 ounce (453cc) measuring cup and an accuratemercury thermometer or thermocouple type temperature tester. For accurate results, the following proceduremust be followed carefully:

1. Fill the measuring cup with 16 oz. (453cc) of tap water and measure the temperature of the water with athermometer or thermocouple temperature tester. Stir the thermometer or thermocouple through the wateruntil the temperature stabilizes. Record the temperature of the water.

2. Place the cup of water in the oven. Operate oven at POWER 10(HIGH) selecting more than 60 secondscook time. Allow the water to heat for 60 seconds, measuring with a stop watch, second hand of a watchor the digital read-out countdown.

3. Remove the cup from the oven and again measure the temperature, making sure to stir the thermometeror thermocouple through the water until the maximum temperature is recorded.

4. Subtract the cold water temperature from the hot water temperature. The normal result should be 28ο to54οF (16ο to 30οC) rise in temperature. If the water temperatures are accurately measured and tested forthe required time period the test results will indicate if the magnetron tube has low power output (low risein water temperature) which would extend cooking time or high power output (high rise in watertemperature) which would reduce cooking time. Because cooking time can be adjusted to compensate forpower output, the magnetron tube assembly should be replaced only if the water temperature rise testindicates a power output well beyond the normal limits. The test is only accurate if the power supply linevoltage is 120 volts and the oven cavity is clean.

G MAGNETRON ASSEMBLY TEST

1. Disconnect the power supply cord.2. Open the drawer and keep it open.3. To discharge high voltage capacitor, wait for 60 seconds.4. A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the

temperature of the thermal cut-out reaches approximately 293οF(145οC).An open thermal cut-out indicates overheating of the oven, exchange the oven thermal cut-out andcheck inside of oven cavity and for improper setting of cooking time or operation of control unit. Checkfor restricted air flow through the vent holes of the oven cavity, especially the cooling fan and air guide.

5. Reconnect all leads removed from components during testing.6. Reassemble the unit.7. Reconnect the power supply cord.8. Run the unit and check all functions.

CAUTION: IF THE THERMAL CUT-OUT INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE,REPLACE THERMAL CUT-OUT.

H THERMAL CUT-OUT TEST

Refer to the disassembly instructions found on Page 16.

TEST PROCEDURES


15


MMOONNIITTOORRSSWWIITTCCHH

IINNTTEERRLLOOCCKKSSWWIITTCCHH

SSEECCOONNDDAARRYY

((BBLLKK))

((BBRRNN,,GGRRYY))

((BBRRNN,,BBLLKK))

((RREEDD))Screw Driver

Ohmmeter

1. Disconnect the power supply cord.2. Open the drawer and keep it open.3. To discharge high voltage capacitor, wait for 60 seconds.4. Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal

of the switch. The meter should indicate an open circuit with the drawer open and a closed circuit withthe drawer closed. If improper operation is indicated, replace the secondary interlock switch.


I SECONDARY INTERLOCK SWITCH TEST

STOP SWITCH1. Disconnect the power supply cord.2. Open the drawer and keep it open.3. To discharge high voltage capacitor, wait for 60 seconds.4. Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal

of the switch. The meter should indicate an open circuit with the drawer open and a closed circuit withthe drawer closed. If improper operation is indicated, replace the stop switch.


NOTE: If the stop switch contacts fail in the open position and the door is closed, the cooling fan motor,stirrer motor and oven light will be activated by RY1.

J STOP SWITCH TEST

K MONITOR SWITCH TEST

1. Disconnect the power supply cord.2. Open the drawer and keep it open.3. To discharge high voltage capacitor, wait for 60 seconds.4. Before performing this test, make sure that the secondary interlock switch, according to the above

Switch Test Procedure. Disconnect the wire lead from the monitor switch (COM) terminal. Check themonitor switch operation by using the ohmmeter as follows. When the drawer is open, the meter shouldindicate a closed circuit. When the monitor switch actuator is pushed by a screw driver through thelower latch hole on the front plate of the oven cavity with the drawer opened (in this condition theplunger of the monitor switch is pushed in), the meter should indicate an open circuit. If improperoperation is indicated, the switch may be defective and both the monitor switch, plus fuse will needto be replaced. After testing the monitor switch, reconnect the wire lead to the monitor switch (COM)terminal and check the continuity of the monitor circuit.


TEST PROCEDURES


16


TEST PROCEDURES


M POWER TRANSFORMER TEST

1. Disconnect the power supply cord.2. Open the drawer and block it open.3. Discharge high voltage capacitor.4. Disconnect the primary input terminals and measure the resistance of the transformer with an

ohmmeter. Check for continuity of the coils with an ohmmeter. On the R x 1 scale, the resistance ofthe primary coil should be less than 1 ohm and the resistance of the high voltage coil should beapproximately 90 ohms; the resistance of the filament coil should be less than 1 ohm.


(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TOMEASURE THE FILAMENT AND HIGH VOLTAGE.)

1. Disconnect the power supply cord.2. Open the drawer and block it open.3. To discharge high voltage capacitor, wait for 60 seconds.4. If the monitor fuse is blown when the drawer is opened, check the primary interlock switch, secondary

interlock switch and monitor switch according to the "TEST PROCEDURE" for those switches beforereplacing the blown monitor fuse.

CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE, TEST THE SECONDARY INTERLOCKSWITCH, STOP SWITCH AND MONITOR SWITCH FOR PROPER OPERATION.

If the monitor fuse is blown by improper switch operation, the monitor fuse and monitor switch mustbe replaced with "monitor fuse and monitor switch assembly" part number FFS-BA018/KIT, even if themonitor switch operates normally. The monitor fuse and monitor switch assembly is comprised of a20 ampere fuse and switch.


L BLOWN MONITOR FUSE TEST

17


TOUCH CONTROL PANEL ASSEMBLY

OUTLINE OF TOUCH CONTROL PANEL

The touch control section consists of the following units.

(1) Key unit(2) Control Unit(3) Power unit

The principal functions of these units and the signals com-municated among them are explained below.

Key unitThe key unit is composed of a matrix, signals generated inthe LSI are sent to the key unit from P10 - P17.When a key pad is touched, a signal is completed throughthe key unit and passed back to the LSI through P20 - P23to perform the function that was requested.

Control Unit and Power UnitControl unit consists of LSI, IC, reset circuit, indicator circuit,power source circuit, relay circuit, buzzer circuit, synchro-nizing signal circuit, keyboard unit circuit, humidity sensorcircuit and back light circuit.

1) IC1 (LSI)This is a microcomputer, responsible for controlling theentire control unit.

2) IC2This is the IC to drive the Liquid Crystal Display.

3) IC5This is the IC to amplify the signal from the humiditysensor.

4) Reset CircuitThis circuit generates a signal which resets the LSI (IC1)to the initial state when power is supplied.

5) Indicator CircuitA circuit to drive the Liquid Crystal Displays (LCD1).

6) Power Source CircuitThis circuit generates voltages necessary in the controlunit from the AC line voltage.In addition, the synchronizing signal is available in orderto compose a basic standard time in the clock circuit.

Symbol Voltage Application

VC +5V LSI(IC1)

7) Relay CircuitA circuit to drive the magnetron, fan motor, stirrer motorand light the oven lamp.

8) Buzzer CircuitThe buzzer is responsive to signals from the LSI to emitaudible sounds (key touch sound and completion sound).

9) Synchronizing Signal CircuitThe power source synchronizing signal is available inorder to compose a basic standard time in the clockcircuit.It accompanies a very small error because it works oncommercial frequency.

10) Door Sensing Switch (Microwave drawer)A switch to “tell” the LSI if the drawer is open or closed.

11) Door Position Switch Front / RearThe switch to “tell” the position of the Microwave drawerdoor.

12) Back Light CircuitA circuit to drive the back light (Light emitting diodesLD1- LD3).

13) Humidity Sensor CircuitThis circuit detects moisture of the cooking food to allowits automatic cooking.

14) Microwave drawer door open-close CircuitA circuit to drive the microwave drawer door open-closemotor.

18


1 - 3 AN5- AN3 IN Terminal to change cooking input according to the Model.By using A/D converter contained in the LSI, DC voltage in accordance with the Modelin operation is applied to set up its cooking constant.

4 AN2 IN Input signal which inform the drawer door is in the middle position between the openedposition and the closed position, to LSI from the door position switch rear.

5 AN1 IN Turminal not used.

6 AN0 IN Turminal not used.

7 CNVSS IN Power source voltage: 0V (GND).VC voltage of power source circuit input. Connected GND.

8 RESET IN Auto clear terminal.Signal is input to reset the LSI to the initial state when power is applied. Temporarily setto “L” level the moment power is applied, at this time the LSI is reset. Thereafter set at “H”level.

9 P62 OUT Turminal not used.

10 P61 IN/OUT Turminal not used.

11 VSS IN Power source voltage: 0V (GND).VS voltage of power source circuit input. Connected GND.

12 XIN IN Internal clock oscillation frequency setting input.The internal clock frequency is set by inserting the ceramic filter oscillation circuit withrespect to Xout terminal.

13 XOUT OUT Internal clock oscillation frequency control output.Output to control oscillation input of Xin.

14 VCC IN Power source voltage: +5V.VC voltage of power source circuit input.

15 P60 IN Plus signal coming from the Microwave drawer door open-close motor is input into P60as revolution number.

16 P37 IN Input signal which communicates the drawer door open information to LSI fromthe door position switch front.

Door opened; “L” level signal(0V).Door closed; “H” level signal(+5V).

17 P36 OUT Signal to change the rotational direction is output to the Microwave drawer dooropen-close motor.

18 TXOUT OUT Signal to change the rotational speed is output to the Microwave drawer door open-closemotor.

19 P34 OUT Power source to drive the Microwave drawer door open-close motor is output.

20 RXD2 IN Input terminal to check the data of display.Data signal from IC-2 is input to RXD2 to check the flow of the data.

21 TXD2 IN Output terminal to send IC-2 the data.The data of display is output to IC-2.

22 SCLK2 OUT Clock timing signaI output terminal.Clock timing signal is sent to IC-2.

23 P30 OUT Signal to reset LSI.Signal is output to reset IC-2.

24 - 25 COM3 - COM2 OUT Turminal not used.

26 COM1 OUT Common data signal.Connected to LCD signal C5.

DESCRIPTION OF LSI (IC-1)

The I/O signal of the LSIis detailed in the following table.

Pin No. Signal I/O Description

19


27 COM0 OUT Common data signal.Connected to LCD signal C4.

28 VL3 IN Connected VC (+5V).

29 - 31 P27- P25 OUT Turminal not used.

32 SEG20 OUT Segment data signal.Connected to LCD segment S24.

33 P23 IN Signal coming from touch key.When any one of J-4 line keys on key matrix is touched, a corresponding signal from P10-P17 will be input into P23. When no key is touched, the signal is held at "L" level.

34 P22 IN Signal similar to P23.When any one of J-3 line keys on key matrix is touched, a corresponding signal will beinput into P22.



37 P17 OUT Key strobe signal.Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while oneof J-12 line key on matrix is touched.








45 P07 OUT Fan motor (Drawer) driving signal.To turn on and off relay(RY4).“H” level: During fan motor ON.“L” level: During fan motor OFF.

46 P06 OUT Stirrer motor driving signal.To turn on and off relay(RY3).“H” level: During fan motor ON.

“L” level: During fan motor OFF.


ON

OFF L: GND

H: +5V

ON

OFF L: GND

H: +5V

20



47 P05 OUT Magnetron high-voltage circuit driving signal.To turn on and off the cook relay(RY2). In 100%power operation, the signals holds “H” level duringmicrowave cooking and “L” level while not cook-ing. In other cooking modes (90%, 80%, 70%,60%, 50%, 40%, 30%, 20%, 10%, 0%) the signalturns to “H” level and “L” level in repetition accord-ing to the power level.

48-52 P04-P00 OUT Used for initial balancing of the bridge circuit (absolute humidity sensor).

53 P57 OUT Common relay driving signal. (Square Waveform : 60Hz)

To turn on and off the shut-off relays (RY1). Thesquare waveform voltage is delivered to the relay(RY1) driving circuit.

54 P56 IN Turminal not used.

55 TXD1 IN Turminal not used.

56 RXD1 IN Turminal not used.

57 P53 IN Turminal not used.

58 P52 OUT Signal to sound buzzer.

A: Key touch sound.

B: Completion sound.

C: When the oven stops so that the food can bechecked in Automatic cooking mode.

59 P51 IN Input signal which communicates the drawer door close information to LSI.

Door opened; “H” level signal(+5V).Door closed; “L” level signal(0V).

60 INT0 IN Signal to synchronize LSI with commercial power source frequency.This is the basic timing for all real time processing of LSI.

61 AVSS IN A/D converter power source voltage.The power source voltage to drive the A/D converter in the LSI.

62 VREF IN Reference voltage input terminal.A reference voltage applied to the A/D converter in the LSI. Connected to +5V.

63 AN7 IN AH sensor input.This input is an analog input terminal from the AH sensor circuit, and connected to the A/D converter built into the LSI.

64 AN6 IN Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is ananalog input terminal from the AH sensor circuit, and connected to the A/D converter builtinto the LSI.

Microwave cooking mode Other cooking mode

VARI MODE ON TIME OFF TIME ON TIME OFF TIME

100% power 32 sec. 0 sec. 60sec. 0ec.

90% power 30 sec. 2 sec. 54sec. 6sec.










During cooking

L: GND

H: +5V

16.7 msec.

A

B

CH: +5V

L: GND

0.1 sec

2.0 sec

1.0 sec 1.0 sec

16.7 msec.

H : +5V

L : GND

21


(1) Structure of Humidity SensorThe humidity sensor includes two thermistors as shownin the illustration. One thermistor is housed in the closedvessel filled with dry air while another in the open vessel.Each sensor is provided with the protective cover madeof metal mesh to be protected from the external airflow.

(2) Operational Principle of Humidity SensorThe figure below shows the basic structure of an absolutehumidity sensor. A bridge circuit is formed by twothermistors and two resistors (R1 and R2).The output of the bridge circuit is to be amplified by theoperational amplifier.Each thermistor is supplied with a current to keep itheated at about 150οC (302οF), the resultant heat isdissipated in the air and if the two thermistors are placedin different humidity conditions they show different degreesof heat conductivity leading to a potential differencebetween them causing an output voltage from the bridgecircuit, the intensity of which is increased as the absolutehumidity of the air increases. Since the output is variedevery minute, it is amplified by the operational amplifier.

(3) Detector Circuit of Humidity Sensor CircuitThis detector circuit is used to detect the output voltageof the absolute humidity circuit to allow the LSI to controlsensor cooking of the unit. When the unit is set in thesensor cooking mode, 16 seconds clearing cycle occursthan the detector circuit starts to function and the LSIobserves the initial voltage available at its AN6 terminal.With this voltage given, the switches SW1 to SW5 in theLSI are turned on in such a way as to change theresistance values in parallel with R45 ~ R49. Changingthe resistance values results in that there is the same

HUMIDITY SENSOR CIRCUIT

potential at both F-3 terminal of the absolute humiditysensor and AN6 terminal of the LSI. The voltage of AN7terminal will indicate about +2.5V. This initial balancing isset up about 16 seconds after the unit is put in the SensorCooking mode. As the sensor cooking proceeds, thefood is heated to generate moisture by which theresistance balance of the bridge circuit is deviated toincrease the voltage available at AN6 terminal of the LSI.Then the LSI observes that voltage at AN7 terminal andcompares it with its initial value, and when the comparisonrate reaches the preset value (fixed for each menu to becooked), the LSI causes the unit to stop sensor cooking;thereafter, the unit goes in the next operation automatically.When the LSI starts to detect the initial voltage at AN7terminal 16 seconds after the unit has been put in theSensor Cooking mode, if it is not possible to balance thebridge circuit due to disconnection of the absolute humiditysensor, ERROR will appear on the display and thecooking is stopped.

1) Humidity sensor circuit

ventilation opening for sensing

Sensing part(Open vessel)

Sensing part(Closed vessel)

Thermistors

S

C

R3

R1

R2

+

Operationalamplifier

Outputvoltage

S : Thermistor open vesselC : Thermistor closed vessel

2Absolute humidity (g/m )

Out

put v

olta

ge

Absolute humidity vs,output voltage characteristic

R43 1.8K

VA : +15V VC : +5V

R42 3.

57K

R41 3.

32K

S

C

R51 47K

R45 620K

R46 300K

R47 150K

R48 75K

R49 37.4K

R44 360K

R50 10K

3

F2

8

4

1

2

IC5+

-

R4

0

43

0

C4

2 0

.1μ

F

D40 D41

R52 47K

86

63

P04

P03

P02

P01

P00

AN6

SW1

SW2

SW3

SW4

SW5

AN7

LSI(IC1)

64

52

51

50

49

48

C. Thermistor in closed vessel

S. Thermistor in open vessel

F3

F1

22


1. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of thecircuits. When handling these parts, the followingprecautions should be strictly followed. CMOS LSI haveextremely high impedance at its input and output terminals.For this reason, it is easily influenced by the surroundinghigh voltage power source, static electricity charge inclothes, etc. and sometimes it is not fully protected by thebuilt-in protection circuit.In order to protect CMOS LSI.

1) When storing and transporting, thoroughly wrap them inaluminium foil. Also wrap all PW boards containing themin aluminium foil.

2) When soldering, ground the technician as shown in thefigure and use grounded soldering iron and work table.

2. Servicing of Touch Control PanelWe describe the procedures to permit servicing of thetouch control panel of the microwave oven and theprecautions you must take when doing so. To performthe servicing, power to the touch control panel is availableeither from the power line of the oven itself or from anexternal power source.

(1) Servicing the touch control panel with power supplyof the oven:CAUTION:THE HIGH VOLTAGE TRANSFORMER OF THEMICROWAVE OVEN IS STILL LIVE DURINGSERVICING AND PRESENTS A HAZARD.Therefore, before checking the performance of the touchcontrol panel,1) Disconnect the power supply cord, and then remove

outer case.2) Open the door and block it open.3) Discharge high voltage capacitor.4) Disconnect the leads to the primary of the power

transformer.5) Ensure that these leads remain isolated from other

components and oven chassis by using insulationtape.

6) After that procedure, re-connect the power supplycord.

After checking the performance of the touch controlpanel,1) Disconnect the power supply cord.2) Open the door and block it open.3) Re-connect the leads to the primary of the power

transformer.4) Re-install the outer case (cabinet).5) Re-connect the power supply cord after the outer

case is installed.6) Run the oven and check all functions.

TOUCH CONTROL PANEL SERVICING

A. On some models, the power supply cord between thetouch control panel and the oven itself is so short that thetwo can’t be separated. For those models, check andrepair all the controls (sensor-related ones included) ofthe touch control panel while keeping it connected to theoven.

B. On some models, the power supply cord between thetouch control panel and the oven proper is long enoughthat they may be separated from each other. For thosemodels, it is possible to check and repair the controls ofthe touch control panel while keeping it apart from theoven proper; in this case you must short both ends of thedoor sensing switch (on PWB) of the touch control panelwith a jumper, which activates an operational state thatis equivalent to the oven door being closed. As for thesensor-related controls of the touch control panel,checking them is possible if dummy resistor(s) withresistance equal to that of the controls are used.

(2) Servicing the touch control panel with power supplyfrom an external power source:Disconnect the touch control panel completely from theoven proper, and short both ends of the door sensingswitch (on PWB) of the touch control panel, whichactivates an operational state that is equivalent to theoven door being closed. Connect an external powersource to the power input terminal of the touch controlpanel, then it is possible to check and repair the controlsof the touch control panel it is also possible to check thesensor-related controls of the touch control panel byusing the dummy resistor(s).

3. Servicing ToolsTools required to service the touch control panelassembly.1) Soldering iron: 30W

(It is recommended to use a soldering iron with agrounding terminal.)

2) Oscilloscope: Single beam, frequency range: DC-10MHz type or more advanced model.

3) Others: Hand tools

4. Other Precautions1) Before turning on the power source of the control unit,

remove the aluminium foil applied for preventingstatic electricity.

2) Connect the connectors of the key unit to the controlunit being sure that the lead wires are not twisted.

3) After aluminium foil is removed, be careful thatabnormal voltage due to static electricity etc. is notapplied to the input or output terminals.

4) Attach connectors, electrolytic capacitors, etc. toPWB, making sure that all connections are tight.

5) Be sure to use specified components where highprecision is required.

approx. 1M ohm

23


PRECAUTIONS FOR USING LEAD-FREE SOLDER

1. Employing lead-free solderThe "Main PWB" of this model employs lead-free solder. This is indicated by the "LF" symbol printed on the PWB andin the service manual. The suffix letter indicates the alloy type of the solder.Example:

Indicates lead-free solder of tin, silver and copper.

2. Using lead-free wire solderWhen repairing a PWB with the "LF" symbol, only lead-free solder should be used. (Using normal tin/lead alloy soldermay result in cold soldered joints and damage to printed patterns.)As the melting point of lead-free solder is approximately 40oC higher than tin/lead alloy solder, it is recommend that adedicated bit is used, and that the iron temperature is adjusted accordingly.

3. SolderingAs the melting point of lead-free solder (Sn-Ag-Cu) is higher and has poorer wettability, (flow), to prevent damage to theland of the PWB, extreme care should be taken not to leave the bit in contact with the PWB for an extended period oftime. Remove the bit as soon as a good flow is achieved. The high content of tin in lead free solder will cause prematurecorrosion of the bit. To reduce wear on the bit, reduce the temperature or turn off the iron when it is not required.Leaving different types of solder on the bit will cause contamination of the different alloys, which will alter theircharacteristics, making good soldering more difficult. It will be necessary to clean and replace bits more often when usinglead-free solder. To reduce bit wear, care should be taken to clean the bit thoroughly after each use.

24


Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with the following partsmay result in severe, possibly fatal, electric shock.(Example)High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..

WARNING: To Avoid possible exposure to microwave energy, please follow the instructions below

before operating the oven.

WARNING AGAINST HIGH VOLTAGE:

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

To prevent an electric shock, take the following pre-cautions:1. Before wiring:

1) Disconnect the power supply cord.2) Open the drawer.3) Wait 60 seconds, then discharge the high voltage

capacitor.2. Don’t let the wire leads touch to the following parts:

1) High voltage parts:Magnetron, High voltage transformer, High voltagecapacitor and High voltage rectifier assembly.

2) Hot parts:Oven lamp, Magnetron, High voltage transformer andOven cavity.

WARNING FOR WIRING

1. Disconnect the power supply cord.2. Make sure that a definite” click” can be heard when the

microwave oven drawer is unlatched. (Hold the drawerin a closed position with one hand, then pull the draweropen, this causes the latch leads to rise, it is thenpossible to hear a “click’ as the drawer switches operate.)

3. Visually check the drawer and cavity face plate fordamage (dents, cracks, signs of arcing etc.).

Carry out any remedial work that is necessary beforeoperating the oven.Do not operate the oven if any of the following conditionsexist:

1. Drawer does not close firmly.

2. Drawer latch hook is damaged.3. The drawer gasket or seal is damaged.4. The drawer is bent or warped.5. There are defective parts in the drawer interlock system.6. There are de fective parts in the microwave generating

and transmission assembly.7. There is visible damage to the oven.

Do not operate the oven:1. Without the RF gasket (Magnetron).2. If the wave guide or oven cavity are not intact.3. If the drawer is not closed.

25


Back cover

Exhaust duct

screws

Top plate

Right side panel

Left side panel

Air cover

Cavity

MICROWAVE DRAWER DISASSEMBLY

Fig. 1

1. Before removing Microwave Drawer, take measures to protect the Drawer louver by either removing the louver or by letting the louver over hang off flat protected surface (Fig 1).

2. Open the Drawer to access the 4 mounting screws holding the unit on to the wall or cabinet opening. (Fig 1).

3. Close Drawer and carefully pull the unit out from opening and unplug the power supply cord.

4. Remove top cover. (Fig 2).

5. Remove air cover from back of unit, then both side cabinets. (Fig 2).

6. Remove exhaust duct and back plate. (Fig 2).

NOTE: You now have access to various components for the Drawer.

WARNING: Follow all safety precautions as stated at the beginning of this Service Manual before proceeding!

Fig. 2

Louver

26


At this point, you will have access to all parts of the Microwave Drawer.

7. To remove the Control Panel Frame Assembly, remove the 6 screws holding the CP frame to the C/P angle in the back (Fig 3).

8. Unsnap the top C/P frame assembly away from the C/P frame and unplug all wires. The C/P frame assembly is now free.

Fig. 3

27


1. Follow the Microwave Drawer disassembly as previouslystated

2. Open the drawer and keep it open.3. To discharge the high voltage capacitor, wait for 60

seconds.4. Remove the screw holding the latch hook to the oven

flange.5. Remove the latch hook from the oven flange.6. Disconnect the wire leads of each switch.7. Remove each switch from the latch hook by pushing the

one (1) stopper tab holding each switch.8. Now, each switch is free.

STOP SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL

Re-install1. Re-install each switch in its place. The secondary interlock

switch is in the lower position and the monitor switch is inthe top position, located on the left side of the unit. Thedoor sensing switch by itself on the right side of the unit.

2. Re-connect wire leads to each switch. Refer to pictorialdiagram.

3. Secure the latch hooks with mounting screws to ovenflange.

4. Make sure that the monitor switch is operating properlyand check continuity of the monitor circuit. Refer tochapter "Test Procedure" and "Adjustment procedure".

1. Follow the Microwave Drawer disassembly as previouslystated

2. Open the drawer and keep it open.3. To discharge the high voltage capacitor, wait for 60

seconds.4. If the door sensing switch, secondary interlock switch

and monitor switch do not operate properly due to amisadjustment, the following adjustment should be made.

6. Loosen the screw holding latch hook to the oven cavityflange.

7. With drawer closed, adjust latch hook by moving it backand forth, and up and down. In and out play of the doorallowed by the upper and lower position of the latch hookshould be less than 0.5mm. The vertical position of thelatch hook should be adjusted so that the secondaryinterlock switch is activated with the drawer closed. Thehorizontal position of the latch hook should be adjustedso that the monitor switch and drawer sensing switch areactivated with the drawer closed.

8. Secure the screws with washers firmly.9. Check all of the switches operation. If any switch has not

activated fully, you will need to adjust the slide railattached to the Microwave cavity.

10.This is done by following the steps to remove the"DRAWER/SLIDE RAIL REMOVAL" on page 28. Afteryou have removed the slide rails, loosen the "2" screwsholding the slide rail to the Microwave cavity and tilt thefront end up and the rear end down, then tighten thescrews (Fig. S-1).

STOP SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT

11.Check and assure that the cap nuts on the DrawerSupport Angles are centered when passing through thecavity face plate.

After adjustment, check the following.1. In and out play of door remains less than 0.5mm when in

the latched position. First check upper position of latchhook, pushing and pulling upper portion of drawer towardthe oven face. Then check lower portion of the latch hook,pushing and pulling lower portion of the door toward theoven face. Both results (play in the door) should be lessthan 0.5mm.

2. The secondary interlock switch switch interrupt the circuitbefore the door can be opened.

3. Monitor switch contacts close when door is opened.4. Door sensing switch contacts open when door is opened.5. Reassemble the unit and check for microwave leakage

around door with an approved microwave survey meter.(Refer to Microwave Measurement Procedure.

Latch Hook Left Latch Hook Right

Fig. S-1

28


DRAWER ASSEMBLY AND CHOKE REMOVAL1. Follow the Microwave Drawer disassembly as previously

stated2. Open the drawer and keep it open.3. To discharge the high voltage capacitor, wait for 60 seconds.4. Remove the both right and left side panels.5. Remove (2) Drawer Support Covers from Choke Cover as

shown in (Fig. D-1).6. Insert a putty knife (thickness of about 0.5mm) into the gap

between the choke cover and the door frame.7. Carefully slide choke cover away from drawer as far as

possible.8. Remove (6) screws from all (3) drawer Support Angles as

shown in (Fig. D-2).9. Unhook Drawer Support Angles from drawer, then remove.10.Now, the door assembly is free and the Choke Cover can

now be removed.

DRAWER SUPPORT ANGLE REMOVAL1. Remove Drawer Assembly and Choke Cover as stated in

"DRAWER ASSEMBLY AND CHOKE REMOVAL".2. Remove (2) screws from right or left Latch Angle Assembly,

then remove Angle assembly (Fig. D-4).3. Separate Slide Rails by moving inside lever of Slide Rails.

The Slide Rail will now separate by pulling straight forwardand out (Fig. D-3).

4. At this point, you can replace either Latch Angle Assy orLatch Angles.

To reassemble, just reverse the above order.

After reassembly, do the following.

(A) Make sure that drawer sensing switch, secondaryinterlock switch and monitor switch are operatingproperly. (Refer to chapter "Test Procedures".)

(B) An approved microwave survey meter should be usedto assure compliance with proper microwave radiationemission limitation standards.

After any servicing, make sure of the following :1. Drawer latch heads smoothly catch latch hook through latch

holes and that latch head goes through center of latch hole.2. Deviation of door alignment from horizontal line of cavity face

plate is to be less than 1.0mm.3. Drawer is positioned with its face pressed toward cavity face

plate.4. Reassemble the unit and check for microwave leakage

around drawer with an approved microwave survey meter.(Refer to Microwave Measurement Procedure.)

Note: The drawer on a microwave oven is designed to actas an electronic seal preventing the leakage ofmicrowave energy from oven cavity during cookcycle. This function does not require that door beair-tight, moisture (condensation)-tight or light-tight.Therefore, occasional appearance of moisture, lightor sensing of gentle warm air movement aroundoven drawer is not abnormal and do not ofthemselves indicate a leakage of microwave energyfrom oven cavity.

DRAWER/SLIDE RAIL REMOVAL

Fig. D-1

Fig. D-2

Fig. D-3

Fig. D-4

NOTE:To remove only the

Microwave Drawer, follow steps1, 2, 5, 8, 9 & 10

as instructed under"DRAWER ASSEMBLY AND

CHOKE REMOVAL".

29


SWITCH ANGLE REMOVAL(Locate either the right or left switch angle)

1. Follow the Microwave Drawer disassembly as previously stated2. Open the drawer and keep it open.3. To discharge the high voltage capacitor, wait for 60 seconds.4. To remove switch, remove screw (1) holding switch to switch angle (Fig. S-1).

5. To replace switch angle, remove bottom cover and remove the 2 screwsholding the switch lever (Fig. S-2).

6. Proceed in reverse to reinstall.7. Adjust switch.

SWITCH ANGLE REMOVAL/ADJUSTMENTFig. S-1

Fig. S-2

ACTUATOR REMOVAL/ADJUSTMENT

1. Follow the Microwave Drawer disassembly as previously stated2. Open the drawer and keep it open.3. To discharge the high voltage capacitor, wait for 60 seconds.4. Locate either the right or left actuator and remove the 2 screws holding the actuator to the door support

angles.5. Relpace with the new actuator (Fig. A-3).

Actuator adjustment6. It is very critical that proper adjustment is made to actuator.7. Adjust each actuator to fully depress ("0" gap) switch lever switches on left and right side (Fig. A-4).

NOTE: If this adjustment is not adjusted correctly, it will effect the performance of the Auto Drawer.

Fig. A-3Fig. A-4

30


AUTO DRAWER GEAR REMOVAL1. Follow the Microwave Drawer disassembly as previously stated2. Open the drawer and keep it open.3. To discharge the high voltage capacitor, wait for 60 seconds.4. Unhook wiring Auto Drawer Gear.5. Remove the (4) screws holding the auto drawer gear to the bottom cavity angle (Fig. G-1).5. Pull drawer gear from cavity angle.6. The drawer gear is now free.7. Proceed in reverse to reinstall the Auto Drawer Gear taking care that the gear teeth are set into the

cavity angle correctly.

Fig. G-1

RACK GEAR REMOVAL1. Follow the Microwave Drawer disassembly as previously stated2. Open the drawer and keep it open.3. To discharge the high voltage capacitor, wait for 60 seconds.4. Remove the Microwave Drawer by following steps 1, 2, 5, 8, 9 & 10 as instructed under

"DRAWER ASSEMBLY AND CHOKE REMOVAL".5. Remove the (3) screws holding the Rack Gear to the bottom slide rail (Fig. G-2).7. Proceed in reverse to reinstall the new Rack Gear.

Fig. G-2

31

KB-6015KSKB-6015KKKB-6015KWMICROWAVE DRAWER WIRING DIAGRAM

32


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R2

1

(C22)

R2

2

R23

C23

R2

4

4.7K

4.7K

: C

HE

CK

PO

INT

S

31

1

M-4

E-1

GN

D

CN

-E

4.7

K

4.7

K

4.7

K

34


64 51 2 3

64 51 2 3

A

B

C

D

E

F

G

H

A

B

C

D

E

F

G

H

Figure S-4. Printed Wiring Board of Power Unit

2.5A3

1 2

FUSE

T1

48

D3

ZD

1 J10

RY

1

D12

RY

5

DIP

CN

H

Q1

R1

D2

D1

111

D4

1

1

R10

C10

RY

21

3

P

3D

11D

10

7C

NA

CN

B

C11

R11

RY4

RY3

COM.

COM.

N.O.

N.O.

C1

C2

R3

J11

D7

D5

VR

S1

35


64 51 2 3

64 51 2 3

A

B

C

D

E

F

G

H

A

B

C

D

E

F

G

H

Fig

ure

S-5

. P

rin

ted

Wir

ing

Bo

ard

of

Co

ntr

ol U

nit

7

8 7 86

5

6

Q7

LCD

CN

EC

NN

R40

CF1

11

53

BC

E

5

1

34

3

42

1 2

R6

R5

D2

KQ

3O

CI

C

Q2

B K

C3

C21 C4R22C20

C2

C7

C11

C12R13

C9R17

C8

K ZD4

R11

R34

R14

R18

R46R101

R100

R115

R107R103R102

R21R106R105R104

C103R114C102

R112C100

R113C101

C44D41C54D40R42

C10

C13

C41C30

R68

R69

R15D21

D22

R16

K

SP

C0

S0

S0

S24C4C5

R29

CF2

S24C4C5

C3S0

C0

SP

C90

C8

C6

C5

C3

C21

R27R26

R28

C90

C90

R98 R96R99 R95

D96 KD95 KD97 KQ97R97

R41

J2J1

J4J6

K J3

C5C6

D19 K

D20 K

+

++

+

+

ZD2

R7

1

18

6

Q26

WHA

Q23

Q21

Q25

Q22

1

7

Q20

R8

Q4

C51

R56

R55

C22 C

23 C52

R21 R

24 R58

R20 R

23 R57

R47

R48

R49 Q

664R

45

49

4833

1732

R51

R52

R50

122

111

CN

J

R40

R36

R38

R37

R35

IC5

IC6

C43

R44R

43C

42

Q96

Q95

LCD

51

13

Q24

C40

CN

N

CN

E

Q7

E33

3217

16

R31

R30R

33R32

C15

CF2

1

IC2

48

4964

BC

CN

F

1

113

5

5

R110

R109

R108

R111

CF1

IC1

116

Q5

OC

1

8 91

2

CNXCNM

CN

K

+

CN

FC

NJ

CN

M

IC

O

IB

CE

CO

Q4

Q3

Q2

R6

R5

R8

CN

K

WH

A

CN

X

11

11

1

16

1 289

85

122

3

36


CONTROL PANEL

CONTROL PANEL PARTS LISTNote: The parts marked “ΔΔΔΔΔ” may cause undue microwave exposure.

The parts marked “*” are used in voltage more than 250V. "§" MARK: PARTS DELIVERY SECTION

REF. NO. PART NO. § DESCRIPTION Q'TY CODE

1-1 DPWBFB136MRU0 M Control unit 1 BY1-2 FUNTKB444MRK0 M Key unit [KB6015KS] [KB6015KK] 1 AS1-2 FUNTKB446MRK0 M Key unit [KB6015KW] 1 AS1-3 FPNLCB502MRK0 M C/P frame assy [KB6015KS] 1 AX1-3 FPNLCB504MRK0 M C/P frame assy [KB6015KK] 1 AX1-3 FPNLCB505MRK0 M C/P frame assy [KB6015KW] 1 AX1-4 PCOVPB140MRP0 M C/P cover 1 AM1-5 PCUSGB059MRP0 M C/P cushion 1 AB1-6 LANGTB111MRP0 M C/P angle 1 AM1-7 XEPSD30P10XS0 M Screw 4 AA

1-3

1-2

1-1

1-7

1-7

1-7

1-7

1-5

1-4

1-6

37

KB-6015KSKB-6015KKKB-6015KWMICROWAVE DRAWER PARTS LIST

Note: The parts marked “ΔΔΔΔΔ” may cause undue microwave exposure.The parts marked “*” are used in voltage more than 250V. "§" MARK: PARTS DELIVERY SECTION


3- 1 RTRN-B084MRE0 M Transformer 1 BE3- 2 RV-MZA288WRE0 M Magnetron 1 BK3- 3 FDTCTA234WRKZ M Sensor assy 1 AP3- 4 FFS-BA018/KIT M Monitor switch (V-16G-2C25) with fuse (20A) assembly 1 AF3- 5 XOTSE40P08000 M Screw 1 AA3- 6 TCAUAB050MRR0 M Monitor caution label 2 AD3- 7 LHLD-B028MRF0A M Power supply unit holder 1 AH3- 8 DPWBFB137MRU0 M Power supply 2 BD3- 9 LANGTB073MRP0 M Oven lamp angle 1 AF3-10 LX-CZ0052WRE0 M Screw/washer 6 AA3-11 GCABDB006MRP0 M Back plate 1 BB3-12 PDUC-B141MRP0 M Mag duct 1 AE3-13 PDUC-B142MRP0 M Sensor duct 1 AK3-14 PDUC-B004MRP0 M Exhaust duct A 1 AK3-15 PDUC-B148MRP0 M Exhaust duct B 1 AF3-16 FCOVPB002MRY0 M Stir cover assy 1 AM3-17 PCLICB003MRE0 M Canoe clip 3 AB3-18 MSLIFB001/KIT M Slide rail 3 AU3-19 LANGTB120MRP0 M Door support angle A 2 AK3-20 LANGTB113MRP0 M Door support angle B 1 AK3-21 GCOVHB051MRF0 M Door support cover 2 AB3-22 PSKR-B018MRP0 M Magnetron air guide 1 AC3-23 PFILWB005MRP0 M Lamp filter 1 AB3-24 LANGTB076MRP0 M Partition angle 1 AK3-25 FC-QZB048MRK0 M HVC assy 1 AP3-26 LBNDKB007MRP0 M HVC band 1 AB3-27 XCBSD30P08000 M Screw 3 AA3-28 XOTSE40P12000 M Screw 79 AA3-29 LANGTB114MRP0 M Partition angle L 1 AK3-30 LANGQA581WRPZ M Noise unit angle 1 AD3-31 XJTSD40P16000 M Screw 4 AA3-32 XEPSD30P10XS0 M Power unit assy screw 2 AA3-33 DDORFB098MRK0 M Door assy [KB6015KS] 1 BD3-33 DDORFB102MRK0 M Door assy [KB6015KK] 1 BD3-33 DDORFB103MRK0 M Door assy [KB6015KW] 1 BD3-34 PSHEPB184MRE0 M Sealer film 1 AQ3-35 FFAN-B008MRK0 M Stirrer fan assy 1 AK3-36 FANGTB010MRK0 M Latch angle assy R 1 AH3-37 FANGTB011MRK0 M Latch angle assy L 1 AH3-38 GCABUB146MRP0 M Side cabinet L 1 AY3-39 GCABUB145MRP0 M Side cabinet R 1 AY3-40 PCOVPB143MRP0 M Air cover 1 AE3-41 LX-NZB006MRE0 M Cap nut 6 AA3-42 XHTSD40P08RV0 M Screw 4 AA3-43 TCAUKB001MRR0 M Stirrer cover cleaning label 1 AA3-44 FMOTEA499WRKZ M Fan motor 1 AZ3-45 LANGTB077MRP0 M Fan motor angle 1 AG3-46 RTHM-A135WRZZ M Thermal cut-out 2 AD3-47 FW-VZB267MRE0 M Harness assy 1 BE3-48 PHOK-A079WRF0 M Latch hook R 1 AH3-49 PCUSGB066MRP0 M Cushion 1 AB3-50 PHOK-A080WRF0 M Latch hook L 1 AF3-51 MLEVPA214WRF0 M Switch lever L 1 AK3-52 QSW-MA---WRE0 M Monitor switch - must replace by assy. (3-4) 1 AE3-53 QSW-MA085WRE0 M Switch 4 AE3-54 QSOCLB010MRE0 M Lamp socket 1 AG3-55 XEPSD30P10XS0 M Screw 4 AA3-56 FPWBFA380WRKZ M Noise filter unit 1 AM3-57 RLMPTA071WRE0 M Oven lamp 1 AF3-58 JHNDPB058MRT0 M Door handle [KB6015KS] 1 BC3-58 JHNDPB059MRT0 M Door handle [KB6015KK] 1 BC3-58 JHNDPB060MRT0 M Door handle [KB6015KW] 1 BC

ΔΔΔΔΔ

*

38



3-59 FGLSPB002MRY0 M Oven tray assy 1 BK3-60 GCOVHB052MRF0 M Choke cover 1 AM3-61 PDIF-B053MRT0 M Louver [KB6015KS] 1 AX3-61 PDIF-B054MRT0 M Louver [KB6015KK] 1 AX3-61 PDIF-B055MRT0 M Louver [KB6015KW] 1 AX3-62 RMOTDA261WRZZ M Stirrer motor 4 AH3-63 TCAUHB009MRR0 M User caution label 1 AA3-64 FANGTB012MRK0 M Auto drawer gear assy 1 BH3-65 LANGTB105MRP0 M Switch angle 2 AE3-66 MACT-B001MRF0 M Actuator R 1 AD3-67 MACT-B002MRF0 M Actuator L 1 AD3-68 DPWBFC441WRKZ M SW power supply 1 CM3-69 NGERRB002MRF0 M Rack gear 2 BS3-70 FROLPB029MRK0 M Door support roller assy 1 AG3-71 LHLD-B031MRF0 M Switch PSU holder 1 AC3-72 LANGTB108MRP0 M Louver angle 1 AK3-73 PCOVPB130MRP0 M Cover 1 AG3-74 LANGTB109MRP0 M Side angle 2 AG3-75 TLAB-B056MRR0 M Menu label 1 AA3-76 PCOVPB142MRP0 M Top cover 1 AW

39


64 51 2 3

64 51 2 3

A

B

C

D

E

F

G

H

A

B

C

D

E

F

G

HActual wire harness may be different from illustration.

3-47

3-39

3-3

3-12

3-18

3-36

3-573-54

3-9

3-2

3-19

3-37

3-19

3-16

3-35

3-43

3-63

3-23

3-20

3-173-18

3-10

3-8

3-7

3-29

3-53

3-52

3-503-51

3-53

3-48

3-76

3-22

3-1

3-15

3-24

3-25

3-26

3-62

3-44

3-45

3-30

3-56

3-46

3-11

3-14

3-13

3-18

3-32

3-42

3-32

3-41

3-41

3-42

3-42

3-41

3-28

3-28

3-28

3-28

3-28

3-28

3-27

3-283-283-27

3-42

3-28

3-28

3-283-32

3-28

3-28

3-28

3-28

3-28

3-28

3-28

3-28

3-28

3-10

3-10

3-10

3-28

3-6

3-6

3-38

3-4

3-66

3-67

3-65

3-65

3-28

3-28

3-703-5

3-69

3-27

3-27

3-64

3-28

3-68

3-71

3-55

3-463-28

3-40

3-49

3-28

3-28

3-28

3-28

3-53

3-53

3-28

3-59

3-61

3-21

3-21

3-60

3-34

3-33

3-58

3-31

3-31

3-28

3-28

3-28

3-283-72

3-28

3-73

3-74

3-74

3-75

MICROWAVE DRAWER HARNESSES

MICROWAVE DRAWER

40


PACKING PARTS LISTNote: The parts marked “ΔΔΔΔΔ” may cause undue microwave exposure.

The parts marked “*” are used in voltage more than 250V. "§" MARK: PARTS DELIVERY SECTION


2- 1 TINSEB416MRK0 M Operation manual 1 AM2- 2 TINSEB417MRR0 M Installation sheet 1 AD2- 3 XTPUW50P35000 M Wood screws 4 BC

41


INSTALLION SHEET

OPERATION MANUAL

WOOD SCREWS2-3

2-1

2-2

SUPPORT CORNERS

PACKING CASE

SUPPORT CORNERS

SUPPORT CORNERS

SUPPORT CORNERS

BOTTOM COVER

TOP COVER

Non-replaceable items

PACKING

42


2005 SHARP CORP. (5R2.00E) Printed in U.S.A

COPYRIGHT © 2005 BY SHARP CORPORATION

ALL RIGHTS RESERVED.

No part of this publication may be repro-duced, stored in retrieval systems, or trans-mitted in any form or by any means, elec-tronic, mechanical, photocopying, recording,or otherwise, without prior written permissionof the publisher.

Documents

KB-6015KS KB-6015KK KB-6015KW SERVICE MANUAL