55EA9800-SA (CHASSIS:EJ34D) - LG TV Service Manual (repair manual). Page 97

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Standard Repair Process Detail Technical Manual
A24
Established 
date 
Revised 
Error 
symptom
Content
LCD  TV
D. Function error
2013.01.31
Wifi operation checking method
A24
date 
Content
P4003
1
3 5V WOL
1
+3.5V_WOL
2
+3.3V
3
USB_DM
4
RTS
5
USB DP
5
USB_DP
6
RX
7
GND
8
TX
9
WOL
9
WOL
10
RESET
11
GND
12
CTS
13
NC
14
+3.5V_ST(OLED)
15
IR(OLED)
16
GND
Checking order
16
GND
17
EYE_SCL
18
EYE_SDA
Checking order
1, 2.  Check Wifi cable condition between Wifi assy & Main board.
3.      Check the 3.3V on the terminal 2.
A24
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