LG OLED55B9PTA Service Manual page 69

Standard Repair Process Detail Technical Manual
symptom
Content
① IR & EYE Sensor
C8 Series
Eye
LED
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
Eye
IR
E8 Series
LED
②
A13
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
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Only for training and service purposes
A13
Pin name
LED_R
GND
IR
3.5V_ST
GND
GND
EYE_SCL
KEY2
EYE_SDA
KEY1
n.c
GND
3.5V_WIFI
GND
COMBO_RESET_JA
CK
BT_WAKEUP_HOST
WOL/WIFI_POWER_
ON
GND
3.5V_WIFI
WIFI_DP
WIFI_SUSPEND/RE
SUME_JACK
WIFI_DM
GND
3.5V_WiIFI
GND