LG 55LA7400 - Check Power Input Voltage and ST-BY 5 V

- 68/83 -
Standard Repair Process Detail Technical Manual
Check power input voltage and ST-BY 5V
B. Power error _No power
A18
Established
date
Revised
date
Error
symptom
Content
LCD TV
For ’10 models, there is no voltage out for st-by purpose.
When st-by, only 3.5V is normally on.
2012. 11 .30
Check the DC 24V, 12V, 3.5V.
24 Pin (Power Board ↔ Main Board) - 공통
SMAW200-H18S1 (YEONHO)
1
Power on
2
INV_ON
3
3.5V
4
PDIM #1(PWM Dim #1)
5
3.5V
6
PDIM #2(PWM Dim #2)
7
GND
8
GND
9
24V
10
24V
11
GND
12
GND
13 12V 14
12V
15 12V 16
12V
17 GND 18
GND
19 GND 20
GND
21 GND 22
L/DIM0_VS
23 L/DIM0_MOSI 24 L/DIM0_SCLK
Edge LED
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only