LG 55UH615 - Function Error Troubleshooting

Checking order
1.Check IR cable condition between IR & Main board.( Check picture number① and ②)
2.Check the standby 3.5V on the terminal 18 pin (③)
3.AS checking the Pre-Amp(IR LED light) , the power is in ON condition, an Analog Tester
needle should move slowly, otherwise, it’s defective.
Standard Repair Process Detail Technical Manual
Remote control operation checking method
D. Function error
A22
Established
date
Revised
date
Error
symptom
Content
A22
②
③
<49UH6100-UH>
1
+3.5V_WIFI
2
WIFI_DM_JACK
3
WIFI_DP_JACK
4
GND
5
WOL/WIFI_POWER_ON_JACK
6
GND
7
M-Moudle_RESET
8
GND
12
EYE_SDA
13
EYE_SCL
14
GND
15
IR
16
LED_R_JACK
17
GND
18
+3.5V_ST
19
KEY2_JACK
20
GND
21
GND
Checking order to check Remote control
①
IR & Control Key front
IR & Control Key Rear
IR
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