LG 75UQ9000PSD Service Manual page 73

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Standard Repair Process Detail Technical Manual
symptom
Content
IR & EYE Sensor
Checking order to check remote control
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 22 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
A22
Established
date
Revised
date
Pin
1
2
3
4
5
6
7
WIFI_SUSPEND/RESUEM
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Copyright © 2022 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
A22
Pin name
VCC
WIFI_DM
WIFI_DP
GND
WOL/WIFI_ON
VCC
GND
COMBO_RESET
BT_WAKEUP_HOST
GND
VCC
EYE_SDA
EYE_SCL
GND
IR
LED_R
GND
VCC
KEY2
MIC_DATA
MIC_CLK

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