LG 42LN52XX / 42LN5200 / 42LN5204 (CHASSIS:LD36M) Service Manual ▷ View online
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Entry method
1. Press the IN-START button of the remote controller
for adjustment
2. Check the entry into adjustment item 3
Standard Repair Process Detail Technical Manual
POWER OFF MODE checking method
B. Power error
_Off when on, off whiling viewing
<ALL MODELS>
A14
Established
date
Revised
date
Error
symptom
Content
LCD TV
2013. 01 .09
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Standard Repair Process Detail Technical Manual
Voltage and speaker checking method when there is no audio
C. Audio error_No audio/Normal video
<ALL MODELS>
A15
Established
date
Revised
date
Error
symptom
Content
LCD TV
2013. 01 .09
Check the DC 24V (L3401)
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Checking order
1. Check IR cable condition between IR & Main board.
2. Check the st-by 3.5V on the terminal 4.
3. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog
Tester needle moves slowly, and defective when it does not move at all.
Standard Repair Process Detail Technical Manual
Remote controller operation checking method
D. Function error_ No response in remote controller,
key error
key error
<ALL MODELS>
A16
Established
date
Revised
date
Error
symptom
Content
LCD TV
P600
1
GND
2
KEY1
3
KEY2
4
3.5V_ST
5
GND
6
LED_R
7
IR
8
GND
①
③
2013. 01 .09
②
①
36 / 36
Checking order
1. Check IR cable condition between IR & Main board.
2. Check the st-by 3.5V on the terminal 4.
3. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog
Tester needle moves slowly, and defective when it does not move at all.
Standard Repair Process Detail Technical Manual
Remote controller operation checking method
D. Function error_ No response in remote controller,
key error
key error
<ALL MODELS>
A16
Established
date
Revised
date
Error
symptom
Content
LCD TV
P600
1
GND
2
KEY1
3
KEY2
4
3.5V_ST
5
GND
6
LED_R
7
IR
8
GND
①
③
2013. 01 .09
②
①