LG OLED77C9PTA Service Manual page 66

Standard Repair Process Detail Technical Manual
symptom
Content
① IR & EYE Sensor
C9 Series
LED
Eye
Checking order to check remote control
1. Check IR cable condition between IR & Main board.(Check picture number① and ②)
2. Check the standby 3.5V on the terminal 4 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.
Error
D. Function error
Remote control operation checking method
IR
②
A15
Established
date
Revised
date
Pin
1
2
3
③
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Copyright © 2019 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
A15
Pin name
LED_R
GND
IR
3.5V_ST
GND
GND
EYE_SCL
KEY2
EYE_SDA
KEY1
n.c
n.c
GND
GND
WAKEUP_DEVICE
BT_WAKEUP_HOS
T
WOL/WIFI_POWE
R_ON
GND
3.5V_WIFI
WIFI_DP
COMBO_RESET
WIFI_DM
GND
3.5V_WiIFI
GND