LG 55UJ630V Service Manual page 68

Chassis : ud74p
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Standard Repair Process Detail Technical Manual
symptom
Content
<ALL MODELS>
IR & Control Key front
IR & Control Key Rear
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 25 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
A14
Established
date
Revised
date
1
+3.5V_WIFI
2
WIFI_DM_JACK
3
WIFI_DP_JACK
4
GND
5
WOL/WIFI_POWER_ON_JACK
6
+3.5V_WIFI
7
COMBO_RESET_JACK
8
GND
9
BT_WAKEUP_DEVICE_JACK
10
BT_WAKEUP_HOST_JACK
11
GND
12
GND
16
EYE_SDA
17
EYE_SCL
18
GND
19
IR_JACK
20
LED_R_JACK
21
GND
22
+3.5V_ST
23
KEY2_JACK
24
KEY1_JACK
25
GND
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Only for training and service purposes
A14

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