LG OLED55C7P-U - Function Error Troubleshooting: Remote Control; IR Cable and Standby Voltage Check

Standard Repair Process Detail Technical Manual
Remote control operation checking method
D. Function error
A13
Established
date
Revised
date
Error
symptom
Content
A13
③
1. Check IR cable condition between IR & Main board.( Check picture number① and ②)
2. Check the standby 3.5V on the terminal 16 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.
Pin
Pin name
1
LED_R
2
GND
3
IR
4
3.5V_ST
5
GND
6
GND
7
EYE_SCL
8
KEY2
9
EYE_SDA
10
KEY1
11
12
GND
13
GND
14
GND
15
WAKEUP_DEVICE
16
BT_WAKEUP_HOST
17
WOL/WIFI_POWER_ON
18
GND
19
3.5V_WIFI
20
WIFI_DP
21
COMBO_RESET
22
WIFI_DM
23
GND
24
3.5V_FIFI
25
GND
②
① IR & EYE Sensor
Eye
LED IR
Checking order to check remote control
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