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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
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.
1
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.
56
(C) 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
11
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 .
12
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 panel.
13
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
14
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.
15
3 Disassembly and Assembly
Memo
16
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 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
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"
return the monitor to default mode.
(Enter)"button for more than five (5) seconds to
17
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.
18
4 Troubleshooting
4-2-1 Circuit Diagram when the power does not turn on
Attached PDF
DC-DC
19
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 panel.
- C heck whether the lam p connector of the panel is connected correctly to
the IP board.
S ym ptom
Check the signal cables and
their connections.
OK
NG
(1) Is X1 oscillating correctly?
OK
(2) D o the R G B inputs appear at
R 114,
R115 and R 116?
OK
D iagnostics
Check and replace the circuits
related to X1.
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_Panel signal
and the BL_EN signal.
C heck and replace the panel.
C aution
M ake sure to disconnect the power before working on the IP board.
20
4 Troubleshooting
4-3-1 Circuit Diagram When a Blank Screen is Displayed
(3)HSYNC (4)VSCIN
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
21
4 Troubleshooting
4-3-2 Waveforms When No Screen is Displaying
22
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 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.
23
Remarks
* A full white pattern is a
feature of a TN panel 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) 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.
24
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.
25
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.
26
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)
27
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)
28
4 Troubleshooting
2) Write EDID: Select "File"- "Auto Write" to enable EDID Writing.
Select 'File' - 'Auto write' to enable
EDID writing.
29
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
30
4 Troubleshooting
3) Finished: Successful EDID written when it shows "PASS" logo as below:
31
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)
32
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#
33
4 Troubleshooting
2) Program process: Click `Read ' button, then select the MCU Code
2) Program process: Click "Auto" button, then press "run " to program
34
4 Troubleshooting
2) Program process: Sometimes, if you program error, please try again with no worry
3) Finished
35
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-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
Remark
SA
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-PANEL;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
.
Panel
Lamp wire for Panel
CN501
1 VCC5V
3 VCC5V
4 GND
5 GND
6 ON/OFF
C
N
8
0
1
C
N
1
0
1
1 VCC5V
1 5V_Panel
16 RXCLK+
2 VCC5V
2 5V_Panel
17 RXCLK-
5 GND
3 5V_Panel
18 GND
6 GND
4 5V_Panel
19 RX2+
20 RX221 GND
22 RX1+
Power
conn
7 ON/OFF
5 5V_Panel
8 BRIGHTNESS
7 BRIGHTNESS
10 PWR_Ctrl
CN103
LVDS for Panel
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
13 RX3+
28
14 RX3-
29
15 GND
CN502
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
39
CN102
VGA Input
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)
40
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
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
41
6 Wiring Diagram
Memo
42