Lamp Scanning Model : Pwm Dim #2; Gnd; Lamp : A-Dim Led : N.c; Pwm Dim #1 - LG 47LM6400 Service Manual

Standard Repair Process Detail Technical Manual
symptom
LCD TV
Edge LED
Edge LED
Copyright ⓒ 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error
B. Power error _No power
Content
Checking method when power is ON
Established
Revised
Check "power on" pin is high
24 Pin (Power Board ↔ Main Board) -
SMAW200-H24S (YEONHO)
Power on
1
24V
3

GND

5
GND
7
3.5V
9
3.5V
11
13 GND
15 GND
17 12V
19 12V
21 12V
23 GND/P_DIM2
• Lamp SCANNING Model
: PWM Dim #2
74 / 79
2010. 12 .14
date
date
공통
24V
2
24V
4
GND
6
GND
8
3.5V
10
3.5V
12
GND
14
16 GND
Inverter On/off
18
Lamp : A-Dim
20
LED : N.C
22

PWM Dim #1

24 Error-out
A19
LGE Internal Use Only