18 Pin
(Power Board ↔ Main Board)
SMAW200-H12S5K
1
Power on
2
PDIM #2
3
GND
4
D13V
5
D13V
6
D13V
7
A13V
8
A13V
9
GND
10
GND
11
DRV_ON
12
PDIM #1
13
GND
14
GND
15
GND
16
L/DIM0_SCLK
17
L/DIM0_VS
18
L/DIM0_MOSI
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.
Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
C. Audio error_No audio/Normal video
<ALL MODELS>
A25
Established
date
Revised
date
Error
symptom
Content
①
③
②
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Only for training and service purposes
LGE Internal Use Only
Summary of Contents for 49LF640 Series
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