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Standard Repair Process Detail Technical Manual
symptom
LCD TV
Content
[LD42B models]
Checking order
1.
Check IR cable condition between IR & Main board
2.
Check the st-by 3.5V on the terminal 16.
4. 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.
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Only for training and service purposes
Error
D. Function error_ No response in remote controller,
key error
Remote controller operation checking method
①
Established
date
Revised
date
[LD42A models]
A27
2014. 01 .20
A27
P4000
1
GND
2
+3.5V_WOL
3
BT_RESET
4
WIFI_DM
5
NC
6
WIFI_DP
7
WIFI_POWER_ON
8
GND
9
EYE_SDA
10
GND
11
EYE_SCL
12
KEY1
13
GND
14
KEY2
③
15
IR
②
16
+3.5V_ST
17
LED_R
18
GND
LGE Internal Use Only
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