LG 50LN54 Series Service Manual page 71

Standard Repair Process Detail Technical Manual
symptom
LCD TV
Content
Edge LED
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Error
B. Power error _No power
Check power input voltage and ST-BY 3.5V
Established
Revised
Check the DC 24V, 12V, 3.5V.
18 Pin (Power Board ↔ Main Board) -
1 Power on
3
3.5V
5
3.5V
7
GND
9
24V
11
GND
13 12V
15 12V
17 GND
2013. 01 .09
date
date
Common
2 DRV ON
4
PDIM#1
6
PDIM#2
8
GND
10
24V
12
GND
14 12V
16
N.C
18 GND
A12
LGE Internal Use Only