Checking Method When Power Is On - LG 42LB5800 Service Manual

Standard Repair Process Detail Technical Manual
symptom
LCD TV
Edge LED
Edge LED
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Only for training and service purposes
Error
B. Power error _No power B Power error No power
t
Content

Checking method when power is ON

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 "power on" pin is high
18 or 24 Pin (Power Board ↔ Main Board) -
FREE LGP-14PL1-IT
1 PWR ON/OFF
3 3.5V
5 3.5V
7 GND
9 9 24V 24V
11 GND
13 12V
15 12V
17 17 GND GND
19 GND
21 GND
23 L/DIMO_MOSI
26 / 97
2014.1.2 2014 1 2
A19
공통
2 INV ON
4 PDIM #1
6 3.5V
8 PDIM #2
10 10 24V 24V
12 GND
14 12V
16 24V or N.C
18 18 GND GND
20 GND
22 L/DIMO_VS
24 L/DIMO_SCLK
LGE Internal Use Only