LG 55LW5700 Service Manual page 102

Standard Repair Process Detail Technical Manual
LCD TV
For '10 models, there is no voltage out for st-by purpose.
When st-by, only 3.5V is normally on.
ALEF LED
Edge LED
Copyright ⓒ 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error
B. Power error _No power
symptom
Content Check power input voltage and ST-BY 5V
Established
date
Revised
date
Check the DC 20V/24V, 12V, 3.5V.
(Power Board ↔ Main Board) -
24 Pin
SMAW200-H24S (YEONHO)
1 Power on
3 20V (24V)
5 GND
7 GND
9 3.5V
11 3.5V
13 GND
15 GND
17 12V
19 12V
21 12V
23 N.C
• Lamp SCANNING Model
: PWM Dim #2
A18
2010. 12 .14
A18
공통
2 20V (24V)
4 20V (24V)
6 GND
8 GND
10 3.5V
12 3.5V
14 GND
16 GND
18 Inverter On/off
20 Lamp : A-Dim
LED : N.C
22 PWM Dim #1
24 Error-out
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LGE Internal Use Only