Standard Repair Process Detail Technical Manual
D. Function error
A22
Established
date
Revised
Error
symptom
Content
LCD TV
2014.02.07
Remote controller operation checking method
A22
date
Content
1 GND
Front
<XXUB83/820X-XX>
2 +3.5V
WOL
3 BT_RESET
4 USB_DM
5 NC
Front
6
USB_DP
7 WOL
8
GND
9 SDA
Back
10 GND
11 SCL
12 KEY1
13 GND
②
③
14 KEY2
15 IR
16
+3.5V_ST
17
LED_R
Checking order
18
GND
Checking order to check remote controller
①
Wifi/ BT Combo
g
1.Check IR cable condition between IR & Main board.( Check picture number
①
and
②
)
2.Check the standby 3.5V on the terminal 16 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
needle should move slowly, otherwise, it s defective.
A22
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Summary of Contents for 49UB8200
Page 54: ......
