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LG 86NANO91TNA Service Manual page 71

Chassis ubx2a

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Standard Repair Process Detail Technical Manual
symptom
Content
IR & EYE Sensor
IR
Eye
LED
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 (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
Established
date
Revised
date
Pin
1
2
3
4
5
WOL/WIFI_PWR_ON
6
7
8
9
COMBO_RESET_JACK
10
BT_WAKE_UP_HOST
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Copyright © 2020 LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
A14
Pin name
+3.5V_WIFI
WIFI_DM
WIFI_DP
GND
+3.5V_WIFI
RESET
GND
GND
+3.5V_WIFI
No Connection
No Connection
No Connection
EYE_SDA
EYE_SCL
GND
IR
LED_R
GND
+3.5V_ST
KEY2
MIC_DATA
MIC_CLK

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