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1 LCD-Monitor Model : B1930N ODM Vendor : INNOLUX [ Important ! ] SVC P/G was separated per ODM Vendor for downloading the MCU code and EDID file. So SVC P/G should be used according to ODM vendor. The 10 th digit is ODM vendor code. Example LS19HANKBUTRU U ”: INNOLUX, “ H”: QISTA, “ G”: TPV SERVICE Manual TFT-LCD Monitor Contents Refer to the service manual in the GSPN (see the rear cover) for the more information. 1. Precautions 2. Product specifications 3. Disassembly and reassembly 4. Troubleshooting 5. Exploded View & Parts List 6. Wiring Diagram 7. Schematic Diagram B1930N

Samsung b1930n Monitor

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Page 1: Samsung b1930n Monitor

1

LCD-Monitor Model : B1930N ODM Vendor : INNOLUX [ Important ! ]

SVC P/G was separated per ODM Vendor for

downloading the MCU code and EDID file.

So SVC P/G should be used according to ODM vendor.

The 10th digit is ODM vendor code.

Example LS19HANKBUTRU

“U”: INNOLUX, “H”: QISTA, “G”: TPV

SERVICE Manual

TFT-LCD Monitor Contents

Refer to the service manual in the GSPN (see the rear cover) for the more information.

1. Precautions

2. Product specifications

3. Disassembly and reassembly

4. Troubleshooting

5. Exploded View & Parts List

6. Wiring Diagram

7. Schematic Diagram

B1930N

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GSPN (Global Service Partner Network)

© 2009 Samsung Electronics Co.,Ltd. All rights reserved. Printed in Korea P/N: TBD

Area Web SiteNorth America http://service.samsungportal.comLatin America http://latin.samsungportal.comCIS http://cis.samsungportal.comEurope http://europe.samsungportal.comChina http://china.samsungportal.comAsia http://asia.samsungportal.comMideast &Africa http://mea.samsungportal.com

This Service Manual is a property of Samsung Electronics Co.,Ltd.Any unauthorized use of Manual can be punished under applicable International and/or domestic law.

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3 Disassembly and Assembly

3 Disassembly and Assembly This section describes the disassembly and reassembly sequences for this monitor.

Warning: As this monitor has parts that are sensitive to static electricity, be careful when handling them. 3-1 Disassembly

Caution: 1. Turn the monitor of before beginning the disassembly process. 2. When disassembling the monitor, do not use any metal tools except for the provided jig. 3. Disassemble the monitor carefully as directed in the following procedures.

Description Photo Screws 1. Place a soft cloth on the table and place the monitor onto it with the back part facing

forwards. Unscrew the base from the monitor

2. remove the screws for base

3. Pull out the stand

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4. 1) remove the screws on the right side for front cover & back cover

2) remove the screws on the left side for front cover &back cover

5. Turn the monitor over and insert your hands into the top of the monitor at the center and separate the front cover in the direction of the arrow as shown in the figure.

6. Turn the monitor over again to remove the back

cover .

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7. Remove the SHIELD-LAMP.

Firstly hold chassis with one hand and bend the shielding in the direction of the arrow as shown in figure to unhook the shielding from the chassis.

Caution: The SHIELD-LAMP is sharp.

Description Photo Screws 8. Remove the LVDS, lamp wire and function

cable then remove the chassis away

9. Remove the LCD panel.

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10. Remove the LENS from the front cover

11. Remove the key pad from the front cover

12. 1)remove the screws on the right side for front cover & decoration

2)remove the screws on the left side for front

cover & decoration

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13. Remove the 4 screws shown in the figure.

14. Remove the 6 screws shown in the figure.

15. Remove the main PCB and IP board from theChassis.

*The assembly is in the reverse order of disassembly.

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3 Disassembly and Assembly Memo

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4 Troubleshooting

4. Troubleshooting 4-1 Troubleshooting 1. Check the power state and the cable connections. Check the connections of the power and signal cables. Check whether the function button operates normally. 2. Check “TEST GOOD” OSD - The Purpose and Function of the self-test A self-test has been added to easily recognized whether the monitor has fault or not and consequently to minimize customer claims for non-malfunctions of the product. - How to perform a self-test Press the menu button in the DPMS state, and determine whether the monitor is normal or not.

Other simple diagnostics

No power (No video and Function LED does not work) Check connection lamp wire, LVDS cable, function cable.

Disconnect inverter connector and check 5V and 25V of IP board connector. If it does not operate, IP board is inferior goods.

Or BL_EN pin connect to 5V. If panel is not on, IP board inferior goods. IP board operate normally: Check + 5V_panel signal. If it operates normally, panel is inferior goods.

Panel & IP board operates normally: check main board and function board.

Notes: 1. Set custom mode as follows before beginning a repair. Resolution: 1360 x 768 H-frequency: 47.7 KHz V-frequency: 60 Hz 2. If the screen is blank, check whether the power cord is connected correctly. 3. The circuits to check: When the raster does not appear: The Function PCB, Main PCB, I/P PBA When 5V is generated but a blank screen is displayed: Main PCB When 5V is not generated: I/P PBA 4. *Press the MENU button and hold down the” (Enter)”button for more than five (5) seconds to

return the monitor to default mode.

No screen Determine according to the output message. - Check Panel 5V of main board and IP board

Focus fault Determine according to dimming level of the "TEXT GOOD" message. - Check panel and LVDS output

Screen trembling Determine according to trembling level of the message window. - Check panel and LVDS output

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4 Troubleshooting

4-2 When the Power Does Not Turn On

Check the connection status for thefunction assy.

NG

Replace the IP board.

ok NGIs DC 3.3V measured at pin 3 of

U101when pin 2 is DC 5V?

Check the circuits related toU101.

okNG

Is DC 1.8V measured at pin 3 ofU102

when pin 2 is DC 3 3V?

Check the circuits related toU102.

ok

Check and replace the Main board.

Caution Make sure to disconnect the power before working on the IP board.

Diagnostics

Is DC 5V measured at pins 1, 2 of theCN101 connector when pins 3, 4 are

0K?

Symptom - When turning on the Power button after connecting the power cable, the LEDat the front of the monitor does not operate.

Major checkpoints

- When turning on the Power button after connecting the power cable, the LEDat the front of the monitor does not operate. - Check the IP board power fuse and the IP board output power. - Check the connections for the IP board and the Main board inside the monitor. - Check the Main board power part and also check whether there is anyabnormal output at any of the other output terminals.

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4 Troubleshooting

4-2-1 Circuit Diagram when the power does not turn on

Attached PDF

DC-DC

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4 Troubleshooting

4-3 When the Screen is Blank

Check the signal cables andtheir connections.

OK NG

① Is X1 oscillating correctly? Check and replace the circuitsrelated to X1.

OK NG② Do the RGB inputs appear at

R114,R115 and R116?

Check the R114, R115, andR116 input term inals.

OK NGCheck the circuits related to

U105.

OK NGDo output signals appear at pins 8 to

30 of CN103?Check the circuits related to

CN103.

OK NGIs DC 5V m easured at pins 1, 2, and

3of the CN103?

Check the +5V_Panel signaland the BL_EN signal.

OK

Check and replace the panel.

Sym ptom - LEven though the LED power turns on, the screen is blank whenconnecting the VGA cable.

Major checkpoints

- Even though the LED power turns on, the screen is blank when connectingthe VGA cable. - Check the D-sub cable connections. - Check whether the LVDS cable is connected correctly to the panel. - Check whether the lam p connector of the panel is connected correctly tothe IP board.

Caution Make sure to disconnect the power before working on the IP board.

DiagnosticsDo the ③ Hsync and ④ Vsync

waveform s appear at pins 16, 17 ofU105, respectively?

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4 Troubleshooting

4-3-1 Circuit Diagram When a Blank Screen is Displayed

Attached PDF.

Interface and VGA

Input

③HSYNC ④VSCIN U105 Pin 16 17

① Is X101 oscillating correctly?

LVDS Connector CN103

② Do the RGB inputs appear at R114,R115,R116

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4 Troubleshooting

4-3-2 Waveforms When No Screen is Displaying

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4 Troubleshooting 4-4 Error Examples and Actions

Error Appearance Symptoms and Actions Remarks

Symptom: A full white screen is displayed regardless of the signals when turning on the monitor. Cause: This error occurs when only lamp power is

supplied and the video signals are not input to the panel due to an LVDS cable connection error.

Action: Replace the LVDS cable or connect the cable correctly so that the video signals can be

supplied to the panel.

* A full white pattern is a feature of a TN panel when no

video signals are supplied.

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4 Troubleshooting

4-5 Adjustment 4-5-1 Service Adjustment Conditions 1. Precautions before a Service Adjustment 1) Check whether the devices for the service adjustment are operating normally. 2) Secure a space that is sufficiently wide for disassembling the monitor. 3) Prepare a soft mat on which the monitor will be disassembled. 2. Entering Service Mode

Entering:

Exiting: 3. Basic Service items to Perform after replacing a board 1) Check the PC color adjustment status. 2) Input DDC (input Analog). 3) Check whether the appropriate MCU code for the model is input. 4) Hard power the monitor off after entering service mode and performing a reset. 4. DDC EDID Data Input 1) Use when updating the AD board code. 2) Download the Foxconn EDID tool program, DDC Input program, and Bin and DDC files appropriate to the

model through the quality control department of Samsung Electronics. Install the jig and input the data, as shown in the figure.

Menu Brightness 0

Power OFF

Contrast 0 Hold down the Enter button for five (5) seconds

Parallel

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4 Troubleshooting

4-5-2 Service Function Specifications

Checking the Code Version 1. Checking the MCU code version and checksum after entering SVC Mode. 2. Entering SVC Mode - Adjust the Brightness and Contrast values to 0. - Hold down the Enter button for five (5) seconds. - The SVC Function OSD is displayed. - To exit the SVC Function, turn the power off. 3. Safe Mode - When the input signal is higher than the supported frequency of the product, safe mode gives users some

time (one minute) to change the video card settings to the Recommended Mode settings.

Service Mode (Moving around) 1. Press the + button to move to other items.

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4 Troubleshooting

2. Press the – button to change the setting to On or Off.

When replacing the panel After replacing the panel, move the panel item and hold down the Menu button for five (5) seconds. The Ch. No is incremented by 1 and then both the on time and cycle are set to 0.

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4 Troubleshooting Inputting the DDC Data

1) Equipment set-up: Equipment (VGA Cable, Parallel Cable, Samsung’s DDC Manager) Hardware setup: Connect LCD to PC Print Port as below:

VGA (D-Sub)

Print Port

VGA Cable

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4 Troubleshooting

2) Write EDID: Click “Model” button to show the “Change Model” Window. Then Select a Model which you want to write EDID (Detailed Model as Table 1)

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4 Troubleshooting 2) Write EDID: Select “File"- “Auto Write" to enable EDID Writing.

Select ‘File’ – ‘Auto write’ to enable EDID writing.

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4 Troubleshooting 2) Write EDID: It will auto write when you enter a S/N which is 15 chars, Pic as below:

Enter a S/N, which is

15 chars

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4 Troubleshooting 3) Finished: Successful EDID written when it shows “PASS” logo as below:

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4 Troubleshooting

Inputting the MCU Data

1) Equipment set-up: Equipment (VGA Cable, Samsung’s DDC Manager, Parallel Cable) Hardware setup: Connect monitor to PC Print Port by ISP Card. Setup As below

Pa rallel Cable VGA Cable

VGA (D-Sub)

Print Port

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4 Troubleshooting

2) Program process: Open the Attached Mstar ISP Tool for Samsung’s DDC Manager (Version 4.3.9.5 E) . Run it. Click ‘Connect ' button, It will select flash memory type automatically

2) Program process: Click “Device” button, then enable WP#

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4 Troubleshooting

2) Program process: Click `Read ' button, then select the MCU Code

2) Program process: Click “Auto” button, then press “run “ to program

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4 Troubleshooting

2) Program process: Sometimes, if you program error, please try again with no worry

3) Finished

Page 28: Samsung b1930n Monitor

5-1

5. Exploded View & Part List

5. Exploded View & Part List

5-1. Exploded View

F001A M0215 M0014

P001A FB01A

R001A

SB03A

SB04A

5-1-1. Parts List

Location No. Code No. Description & Specification Q’ty SA/SNA Remark

F001A BN81-04556A A/S-ASSY COVER P-FRONT;LE18CG,71403E18CG 1 SA

FB01A BN81-04582A A/S-BOARD P-FUNCTION;LE23CK-612,79451150 1 SA

M0014 BN81-04824A A/S-ASSY PCB MAIN;L02-903,LE18CG-510,794 1 SA

M0215 BN07-00610A LCD-PANEL;M185B1-L02,CM18B12,6bit Hi-FRC 1 SA

P001A BN81-04567A A/S-IP BOARD;V0,W/O SPK,LE18CG-612,79449 1 SA

R001A BN81-04550A A/S-ASSY COVER P-REAR;LE18CG,71405E18CG0 1 SA

SB03A BN81-04589A A/S-ASSY STAND P-BAR;LE20CN,71401E20CN00 1 SA

SB04A BN81-04553A A/S-ASSY STAND P-BASE;LE18CG,71402E18CG0 1 SA

Page 29: Samsung b1930n Monitor

5-2

5. Exploded View & Part List

5-2. Parts List

Service Bom (SA: SERVICE AVAILABLE, SNA: SERVICE NOT AVAILABLE)

Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark

0.1 M0215 BN07-00610A LCD-PANEL;M185B1-L02,CM18B12,6bit Hi-FRC 1 SA

0.1 R001A BN81-04550A A/S-ASSY COVER P-REAR;LE18CG,71405E18CG0 1 SA

0.1 SB04A BN81-04553A A/S-ASSY STAND P-BASE;LE18CG,71402E18CG0 1 SA

0.1 F001A BN81-04556A A/S-ASSY COVER P-FRONT;LE18CG,71403E18CG 1 SA

0.1 M9892 BN81-04560A A/S-CUSHION BOTTOM;LE18CG,50610E18CG01R 1 SNA

0.1 M9892 BN81-04561A A/S-CUSHION TOP;LE18CG,50610E18CG00R 1 SNA

0.1 P001A BN81-04567A A/S-IP BOARD;V0,W/O SPK,LE18CG-612,79449 1 SA

0.1 FL06 BN81-04573A A/S-CABLE P-FFC;30P, 192MM,W/CORE,430303 1 SA

0.1 M9891 BN81-04581A A/S-CARTON;LE18CG,B1930N,50602E18CG00R 1 SNA

0.1 FB01A BN81-04582A A/S-BOARD P-FUNCTION;LE23CK-612,79451150 1 SA

0.1 SB03A BN81-04589A A/S-ASSY STAND P-BAR;LE20CN,71401E20CN00 1 SA

0.1 EC18 BN81-04591A A/S-ASSY HRN;2X4P,TO 6P 115mm,4303008040 1 SA

0.1 EC13 BN81-04688A A/S-CABLE;D-SUB 15P,MALE 1.5M BLKBLUE,45 1 SA

0.1 EC11 BN81-04704A A/S-POWER CORD;16A250V,BLK 1.5M,45307080 1 SA

0.1 ACCE1 BN81-04820A A/S-ACCESSORY;FOR EU,B1930N,703061000302 1 SA

0.1 M0014 BN81-04824A A/S-ASSY PCB MAIN;L02-903,LE18CG-510,794 1 SA

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6 Wiring Diagram

6 Wiring Diagram 6-1 Wiring Diagram –Main Board .

Lamp wire for Panel LVDS for Panel CN103

CN501 1 VCC5V 1 VCC5V 1 5V_Panel 16

3 VCC5V 2 VCC5V 2 5V_Panel 174 GND 5 GND 3 5V_Panel 18

5 GND 6 GND 4 5V_Panel 19

6 ON/OFF 7 ON/OFF 5 5V_Panel 207 BRIGHTNESS 8 BRIGHTNESS 6 GND 21

10 PWR_Ctrl 9 PWR_Ctrl 7 GND 228 GND 239 24

10 2511 2612 GND 2713 RX3+ 28

CN502 14 RX3- 2915 GND 30

1 RED+

2 GREEN+&SOG

3 BLUE+45 GND6 RED-7 GREEN-

1 Key-Power 8 BLUE-2 Touch-SDA 93 Touch-SCL # CHK-DSUB4 Key-ATTN #5 PWR_Ctrl # DDC-SDA-VGA6 GND # H-sync7 NC # V-sync8 NC # DDC-SCL-VGA

CN104 CN102

VGA Input

Panel

Power ASS'Y

RXCLK+

RXCLK-GND

RX2+

RX2-GND

AC Power

Keypad Control

Main ASS'Y

CN801

CN101

RX0-GND

RX1+RX1-GNDRX0+

Powerconn

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6 Wiring Diagram

6-2 Wiring Diagram – Main Board

LVDS Connector (Connector to Panel

IP Board

Keypad Connector (Connector to Keypad)

RGB Connector (Connector to PC)

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6 Wiring Diagram

6-3 Connector Functions

Connector Functions

CN101 CN801

Supplies 5V from the power board to the main board and transmits the PWM output from the power board to the inverter. *When a problem occurs: The No Power and Blank Screen errors may occur.

CN501 ~ CN502 Transmits the lamp current (6mA ~ 7mA) generated in the inverter to the lamp of the panel. *When a problem occurs: The Blank Screen error may occur.

CN104 Connects the function board. *When a problem occurs: The No LED screen and Function failure error may occur.

CN105 Transmits the LVDS signals from the main board to the panel. *When a problem occurs: The Blank screen and No Power errors may occur.

6-4 Cables

Use LVDS 30P FFC cable Code

Photo

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6 Wiring Diagram Memo