LG 32LW5700 Manual page 79

Standard Repair Process Detail Technical Manual
LCD TV
ALEF 47"/55"
Edge LED 42 PSU
Copyright ⓒ 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error
B. Power error _No power
symptom
Check power input voltage and ST-BY 5V
Content
Edge LED
32 PSU
Established
date
Revised
date
For '11 models, there is no voltage out for st-by purpose.
When TV is st-by status(DC OFF), only 3.5V output is normally on.
Check the 3.5V signal of 24pin power out when
TV is st-by status
1 Power on
3 20/24V
5 GND
7 GND
9 3.5V
11 3.5V
13 GND
15 GND
17 12V
19 12V
21 12V
NC
23
(Lamp Scanning Model
: PWM Dim #2)
A18 A19
2011. 1. 20
A18
Pin layout (24P)
24V
2
20V (Edge 32/37 Only)
4 20/24V
6 GND
8 GND
10 3.5V
12 3.5V
14 GND
16 PSU : GND, LPB : NC
18 Inverter ON
Lamp : A-dim
20
LED : NC
PWM Dim #1
22
Error-out
24
LGE Internal Use Only