LG OLED77CS LA Series Service Manual page 61

Standard Repair Process Detail Technical Manual
Error symptom
Content
77CS
① IR & EYE Sensor
LED
IR
Checking order to check remote control
1. Check IR cable condition between IR & Main board.(Check picture number① and ②.)
2. Check the Pin 22, Standby Power 3.5V. (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.
D. Function error
Remote control operation checking method
Eye
②
A13
Established
date
Revised
date
Pin
1
2
3
4
5 WOL/WIFI_POWER_ON
6
7 WIFI_SUSPEND/RESUME
8
9
10
11
12
13
14
15
16
17
18
19
20
③
21
22
23
24
25
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Only for training and service purposes.
A13
Pin name
3.5V_WIFI
WIFI_DM
WIFI_DP
GND
3.5V_WIFI
GND
COMBO_RESET
BT_WAKEUP_HOST
GND
3.5V_WIFI
N/C
N/C
N/C
EYE_SDA
EYE_SCL
GND
IR
LED_R
GND
+3.5V_ST
KEY2
WOV_PDM0_DATAIN
WOV_PDM_CLKOUT