LG 42LN5700 Service Manual page 78

Standard Repair Process Detail Technical Manual
symptom
LCD TV
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error
A. Video error_No video/ Audio
Content
Power Board voltage measuring method
The Wafer,18Pin and 24Pin, is used by operating LocalDimming or not LocalDimming
- 24Pin wafer is applied operating L/D at power and main B/D
- 18Pin wafer is applied not operating L/D at power and main B/D
Established
date
Revised
date
Check the DC 24V, 12V, 3.5V.
18 or 24 Pin (Power Board ↔ Main Board) -
SMAW200-H24S (YEONHO)
1
PWR ON/OFF
3
3.5V
5
3.5V
7
GND
9
24V
11
GND
13
12V
15
12V
17
GND
19
GND
21
GND
23
SPI-SIN
18 / 97
2012. 12 .21
공통
2
DVR ON/OFF
4
PDIM #1
6
PDIM #2
8
GND
10
24V
12
GND
14
12V
16
24V or N.C
18
GND
20
GND
22
V-SYNC
24
SPI-SCLK
LGE Internal Use Only
A5