LG 32LV3700-SA (CHASSIS:LJ12B) Service Manual ▷ View online
ⓒ LG Electronics. Inc.2009
Contents of LCD TV Standard Repair Process Detail Technical Manual
No.
Error symptom
Content
Page
Remarks
21
B. Power error_No power
Check front display LED
A17
22
Check power input Voltage & ST-BY 5V
A18
23
Checking method when power is ON
A19
24
POWER BOARD voltage measuring method
A4
25
26
B. Power error_Off when on, off while
viewing
viewing
POWER OFF MODE checking method
A22
27
B. Power error_Off when on, off while
viewing
viewing
POWER BOARD PIN voltage checking
method
method
A19
28
C. Audio error_No audio/Normal video
Checking method in menu when there is no
audio
audio
A24
29
Voltage and speaker checking method when
there is no audio
there is no audio
A25
30
C. Audio error_Wrecked
audio/discontinuation
audio/discontinuation
Voltage and speaker checking method in
case of audio error
case of audio error
A25
31
D. Function error_ No response in
remote controller, key error
remote controller, key error
Remote controller operation checking
method
method
A27
32
D. VCOM Adjustment
Sequence of the Vcom adjustment
A28
Continued from previous page
ⓒ LG Electronics. Inc.2009
Established
date
Standard Repair Process Detail Technical Manual
Revised
date
A1
Error
symptom
Content
Check LCD back light with naked eye
A. Video
error_No
video/Normal audio
After turning on the power and disassembling the case, check with the naked eye,
whether you can see light from 4 locations.
whether you can see light from 4 locations.
<ALL MODELS>
LCD TV
A1
2010. 12 .14
ⓒ LG Electronics. Inc.2009
Standard Repair Process Detail Technical Manual
LED driver B+ 24V measuring method
A. Video error_No video/Normal audio
A2
Established
date
Revised
date
Error
symptom
Content
LCD TV
A2
Check the DC 24V, 12V, 3.5V and Inverter on
ALEF LED
Edge LED
P-dim
A-dim
Inverter ON
Error
GND
24V
P203
14
13
12
11
6~10
1~5
P-dim
A-dim
Inverter ON
Error
GND
24V
P202
14
13
12
11
6~10
1~5
2010. 12 .14
ⓒ LG Electronics. Inc.2009
Entry method
1. Press the ADJ button on the remote controller for adjustment.
2. Enter into White Balance of item 6.
3. After recording the R, G, B (GAIN, Cut) value of Color Temp
(Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD.
Standard Repair Process Detail Technical Manual
Check White Balance value
A. Video error_No video/Normal audio
<ALL MODELS>
A4
Established
date
Revised
date
Error
symptom
Content
LCD TV
A3
Entry method
1. Press the ADJ button on the remote controller for adjustment.
2. Enter into White Balance of item 7.
3. After recording the R, G, B (GAIN, Cut) value of Color Temp
(Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD.
2010. 12 .14
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