Samsung B1930n Monitor 724657

LCD-Monitor Model : B1930N ODM Vendor : INNOLUX [ Important ! ] SVC P/G was separated per ODM Vendor for ing 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 TFT-LCD Monitor

Manual Contents 1. Precautions 2. Product specifications 3. Disassembly and reassembly 4. Troubleshooting 5. Exploded View & Parts List 6. Wiring Diagram 7. Schematic Diagram

B1930N

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

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GSPN (Global Service Partner Network) Area North America Latin America

Web Site http://service.samsungportal.com http://latin.samsungportal.com

CIS Europe

http://cis.samsungportal.com http://europe.samsungportal.com

China Asia

http://china.samsungportal.com http://asia.samsungportal.com

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

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

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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Screws

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

8. Remove the LVDS, lamp wire and function cable then remove the chassis away

9. Remove the LCD .

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Screws

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 the Chassis.

*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.

No screen

Determine according to the output message. - Check 5V of main board and IP board

Focus fault

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

Screen trembling

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

Other simple diagnostics ÆNo 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. ÆIf it does not operate, IP board is inferior goods. Or BL_EN pin connect to 5V. If is not on, IP board inferior goods. IP board operate normally: Check + 5V_ signal. ÆIf it operates normally, is inferior goods. & 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” return the monitor to default mode.

(Enter)”button for more than five (5) seconds to

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4 Troubleshooting

4-2 When the Power Does Not Turn On

Symptom

Major checkpoints

- W hen turning on the Power button after connecting the power cable, the LED at the front of the monitor does not operate. - W hen turning on the Power button after connecting the power cable, the LED at 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 any abnormal output at any of the other output terminals.

Check the connection status for the function assy. Is DC 5V measured at pins 1, 2 of the CN101 connector when pins 3, 4 are 0K? ok

Diagnostics

NG Replace the IP board. NG

Is DC 3.3V measured at pin 3 of U101 when pin 2 is DC 5V? ok Is DC 1.8V measured at pin 3 of U102 when pin 2 is DC 3 3V?

Check the circuits related to U101. NG Check the circuits related to U102.

ok Check and replace the Main board.

Caution

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

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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 - LE v en though the LE D power turns on, the screen is blank when connecting the V G A cable. - E v en though the LE D power turns on, the screen is blank when connecting the V G A cable. - C heck the D -sub cable connections. M ajor checkpoints - C heck whether the LV D S cable is connected correctly to the . - C heck whether the lam p connector of the is connected correctly to the IP board. S ym ptom

Check the signal cables and their connections. OK

D iagnostics

NG

① Is X1 oscillating correctly?

Check and replace the circuits related to X1.

OK ② D o the R G B inputs appear at R 114, R115 and R 116? OK

NG

Do the ③ H sync and ④ Vsync w aveform s appear at pins 16, 17 of U 105, respectively? OK

C heck the R 114, R115, and R116 input term inals. NG Check the circuits related to U 105.

NG

D o output signals appear at pins 8 to 30 of C N103?

Check the circuits related to C N103.

OK Is D C 5V m easured at pins 1, 2, and 3 of the C N103? OK

NG Check the +5V_ signal and the BL_EN signal.

C heck and replace the .

C aution

M ake sure to disconnect the power before working on the IP board.

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4 Troubleshooting

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

③HSYNC ④VSCIN U105 Pin 16 17 LVDS Connector CN103

① Is X101 oscillating correctly?

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

Attached PDF.

Interface and VGA Input

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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

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 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 .

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Remarks

* A full white pattern is a feature of a TN when no video signals are supplied.

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:

Menu

Exiting:

Power OFF

Brightness 0

Contrast 0

Hold down the Enter button for five (5) seconds

Parallel

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) 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.

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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 ed frequency of the product, safe mode gives s 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

After replacing the , move the 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 Cable

Print Port VGA (D-Sub)

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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 “” 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

VGA Cable

rallel Cable

Print Port VGA (D-Sub)

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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

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5. Exploded View & Part List

5. Exploded View & Part List 5-1. Exploded View

F001A

M0215

M0014

R001A

SB03A

FB01A

P001A

SB04A

5-1-1. Parts List Location No.

Code No.

Description & Specification

Q’ty

SA/SNA

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-;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

Remark

5-1

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-;M185B1-L02,CM18B12,6bit Hi-FRC

1

SA

1

SA

0.1

R001A

BN81-04550A

A/S-ASSY COVER P-REAR;LE18CG,71405E18CG0

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

1

SA

0.1

SB03A

BN81-04589A

A/S-ASSY STAND P-BAR;LE20CN,71401E20CN00

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

1

SA

0.1

EC11

BN81-04704A

A/S-POWER CORD;16A250V,BLK 1.5M,45307080

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

5-2

6 Wiring Diagram

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

Lamp wire for CN501

1 VCC5V 3 VCC5V 4 GND 5 GND 6 ON/OFF

C N 8 0 1

C N 1 0 1

7 BRIGHTNESS 10 PWR_Ctrl

CN103

LVDS for

Power conn

1 VCC5V

1 5V_

16 RXCLK+

2 VCC5V

2 5V_

17 RXCLK-

5 GND

3 5V_

18 GND

6 GND

4 5V_

19 RX2+ 20 RX221 GND 22 RX1+

7 ON/OFF

5 5V_

8 BRIGHTNESS

6 GND

9 PWR_Ctrl

7 GND 9

23 RX124 GND

10

25 RX0+

11

26 RX027 GND

8 GND

Power ASS'Y

12 GND CN502

13 RX3+

28

14 RX3-

29

15 GND

30

AC Power 1 RED+

Main ASS'Y

2 GREEN+&SOG 3 BLUE+ 4 5 GND 6 RED7 GREEN-

1 Key-Power

8 BLUE-

2 Touch-SDA

9

3 Touch-SCL

# CHK-DSUB

4 Key-ATTN

#

5 PWR_Ctrl

# DDC-SDA-VGA

6 GND

# H-sync

7 NC

# V-sync

8 NC

# DDC-SCL-VGA

CN104 Keypad Control

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CN102 VGA Input

6 Wiring Diagram

6-2 Wiring Diagram – Main Board LVDS Connector (Connector to

IP Board

Keypad Connector (Connector to Keypad)

RGB Connector (Connector to PC)

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6 Wiring Diagram

6-3 Connector Functions Connector

CN101

Functions

Supplies 5V from the power board to the main board and transmits the PWM output from the power board to the inverter. CN801 *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 . *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 . *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

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