Check Power Input Voltage And St-By 5V - LG 42LB55 series Service Manual

Standard Repair Process Detail Technical Manual
Error
symptom
LCD TV
Content
Copyright © 2014 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
B. Power error _No power

Check power input voltage and ST-BY 5V

Established
2012. 01 .14
date
Revised
date
Check DC 3.5V, 12V, 24V
18 Pin (Power Board ↔ Main Board)
SMAW200-H18S5
1 Power on 2
3 3.5V 4
5 3.5V 6
7 GND 8
9 24V 10
11 GND 12
13 12V 14
15 12V 16
17 GND 18
A12
DRV ON
PDIM#1
3.5V
PDIM#2
24V
GND
12V
NC
GND
LGE Internal Use Only