Lamp Scanning Model : Pwm Dim #2; (Power Board ↔ Main Board) - 공통; Lamp : A-Dim Led : N.c; Pwm Dim #1 - LG 42LV770S Service Manual

Standard Repair Process Detail Technical Manual
Error
symptom
LCD TV
Content
ALEF LED
Edge LED
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Only for training and service purposes
B. Power error _No power
Checking method when power is ON
1
3
5
7
9
11
13
15
17
19
21
23
A19
Established
date
Revised
date
Check "power on" pin is high
(Power Board ↔ Main Board) -
24 Pin
SMAW200-H24S (YEONHO)
Power on
20V (24V)
GND
GND
3.5V 10
3.5V 12
GND 14
GND 16
12V 18
12V 20
12V 22
N.C 24
• Lamp SCANNING Model
: PWM Dim #2
2010. 12 .14
A19
공통
2 20V (24V)
4 20V (24V)
6 GND
8 GND
3.5V
3.5V
GND
GND
Inverter On/off
Lamp : A-Dim
LED : N.C

PWM Dim #1

Error-out

LGE Internal Use Only