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Standard Repair Process Detail Technical Manual
symptom
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 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
18 Pin
1
Power on
3
5
②
7
9
11
DRV_ON
13
15
17
L/DIM0_VS
(Power Board ↔ Main Board)
SMAW200-H12S5K
2
PDIM #2
GND
4
D13V
D13V
6
D13V
A13V
8
A13V
GND
10
GND
12
PDIM #1
GND
14
GND
GND
16
L/DIM0_SCLK
18
L/DIM0_MOSI
Established
date
Revised
date
①
③
A25
LGE Internal Use Only
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