LG 32SE3B-BE Service Manual page 70

Standard Repair Process Detail Technical Manual
symptom
Signage Monitor
Content
[SE3B]
1 PWR On
3
5 D 13.2 V
7 A 13.2 V
9
DRV On
11
(Inverter –On)
Checking order when there is no audio
① Check the contact condition of or 13V connector of Main Board
② Measure the 13V input voltage supplied from Power Board
(If there is no input voltage, remove and check the connector)
③ Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND
and output terminal, the speaker is normal.
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error
C. Audio error_No audio/Normal video
Voltage and speaker checking method
when there is no audio
12 Pin (Power Board ↔ Main Board)
SMAW200-H12S5K(BK)
2
GND 4
6
8
GND 10
12
(32/43) N.C
(49/55) PWM #2
D 13.2 V
D 13.2 V
A 13.2 V
GND
PWM #1
A25
Established
2014. 06 .10
date
Revised
date
①
< Main Ass'y>
A25
LGE Internal Use Only