LG 55LF5950 Service Manual page 72

Standard Repair Process Detail Technical Manual
symptom
LCD TV
Content
<ALL MODELS>
Checking order when there is no audio
① Check the contact condition or A13V connector of Main Board
② Measure the A13V input voltage supplied from Power Board
(If there is no input voltage, remove the cable 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 rights 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
(Power Board ↔ Main Board) -
12 Pin
1 Power on
3
5
②
7
9
11 DRV_ON
SMAW200-H12S5K
2 PDIM #2
GND 4 D13V
D13V 6 D13V
A13V 8 A13V
GND 10 GND
12 PDIM #1
Established
2015. 04. 23
date
Revised
2015. 04. 23
date
①
공통
③
A25
LGE Internal Use Only