LG TY-LCD20W / L202WA-BJB (CHASSIS:LM62C) Service Manual ▷ View online
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ⓒ
2008 LG Electronics. Inc. All right reserved.
ADJUSTMENT
1. Application
This document is applied to 20/23” LCD TV which is manufactured in Monitor Factory or is produced on the basis of this data
2. Designation
(1) The adjustment is according to the order which is designated and which must be followed, according to the plan which can be
changed only on agreeing.
(2) Power Adjustment: Free Voltage
(3) Magnetic Field Condition: Nil.
(4) Input signal Unit: Product Specification Standard
(5) Reserve after operation: Above 30 Minutes
(3) Magnetic Field Condition: Nil.
(4) Input signal Unit: Product Specification Standard
(5) Reserve after operation: Above 30 Minutes
3. Adjustment
3-1. Outgoing Condition
Shipped condition: NTSC(Japan)
º Æ¢
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ⓒ
2008 LG Electronics. Inc. All right reserved.
3-2. SERVICE MAIN MENU Setting
< Enclosure 1> Timing Chart
3-3. Preset CH Information
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ⓒ
2008 LG Electronics. Inc. All right reserved.
220
IBM
Compatible PC
Compatible PC
PARALLEL PORT
Power inlet (required)
Power LED
ST Switch
Power Select Switch
(110V/220V)
(110V/220V)
Control Line
Not used
RS232C
PARALLEL
V-SYNC
POWER
ST
VGS
MONITOR
E
E
V-Sync On/Off Switch
(Switch must be ON.)
(Switch must be ON.)
F
F
A
A
B
B
C
C
15
10
5
5
6
9
1
1
1
14
13
25
6
5V
5V
5V
4.7K
4.7K
4.7K
74LS06
74LS06
OFF
ON
OFF
ON
11
Video Signal
Generator
Generator
Figure 1. Cable Connection
SERVICE OSD
1) Turn off the power switch at the right side of the display.
2) Wait for about 5 seconds and press MENU, POWER switch for 1 second interval.
3) The SVC OSD menu contains additional menus that the User OSD menu as described below.
a) CLEAR ETI : To initialize using time.
c) Auto Color : W/B balance and Automatically sets the gain and offset value.
c) Auto Color : W/B balance and Automatically sets the gain and offset value.
(press key for over 3 sec)
d) AGING : Select Aging mode(on/off).
b) Module : To select applied module.
d) NVRAM INIT : EEPROM initialize.(24C16, press key for over 3 sec)
e) R/G/B-9300K : Allows you to set the R/G/B-9300K value manually.
f) R/G/B-6500K : Allows you to set the R/G/B-6500K value manually.
g) R/G/B-Offset : Allows you to set the R/G/B-Offset value manually.(Analog Only)
h) R/G/B-Gain : Allows you to set the R/G/B-Gain value manually.(Analog Only)
b) Module : To select applied module.
d) NVRAM INIT : EEPROM initialize.(24C16, press key for over 3 sec)
e) R/G/B-9300K : Allows you to set the R/G/B-9300K value manually.
f) R/G/B-6500K : Allows you to set the R/G/B-6500K value manually.
g) R/G/B-Offset : Allows you to set the R/G/B-Offset value manually.(Analog Only)
h) R/G/B-Gain : Allows you to set the R/G/B-Gain value manually.(Analog Only)
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ⓒ
2008 LG Electronics. Inc. All right reserved.
TROUBLESHOOTING GUIDE
1. NO POWER
NO POWER
(POWER INDICATOR OFF)
CHECK IC501
NO
NO
CHECK POWER BOARD,
AND FIND OUT A SHORT
POINT AS OPENING
EACH POWER LINE
AND FIND OUT A SHORT
POINT AS OPENING
EACH POWER LINE
CHECK IC702(1.8V)
IC703(3.3V) LINE
IC703(3.3V) LINE
NO
CHECK CRYSTAL(X501)
YES
YES
YES
CHECK P605 VOLTAGE
PIN5,6 (5V)?
IS IC702 PIN2(1.8V)
IC703 PIN2(3.3V)
CHECK X501 PIN201
PULSE
1
2
1
3
1
4
Waveforms
1
P605-#5,6
2
IC702-#2
3
IC703-#2
4
IC501-#201
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