LG 42LB67 Series Service Manual page 89

Standard Repair Process Detail Technical Manual
symptom
LCD TV
Content
Copyright © 2014 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Error
B. Power error _No power
Checking method when power is ON
Check "power on" pin is high
24 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
19 GND
21 GND
23 L/DIM0_MOSI
A19
Established
2014. 01 .20
date
Revised
date
SMAW200-H24S5
2 Inverter On
4
6
8
10
12
14
16
18
20
22
L/DIM0_VS
24 L/DIM0_SCLK
A19
PWM#1
3.5V
PWM#2
24V
GND
12V
24V
GND
GND
LGE Internal Use Only