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Standard Repair Process Detail Technical Manual
<ALL MODELS>
Checking order when there is no audio
① Check the contact condition of or 24V connector of Main Board
② Measure the 24V 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
symptom
Voltage and speaker checking method
Content
when there is no audio
18 or 24 Pin
②
1
PWR ON/OFF
3
5
7
②
9
11
13
15
17
19
21
23
L/DIMO_MOSI
(Power Board ↔ Main Board)
FREE LGP-14PL1-IT
2
INV ON
3.5V
4
PDIM #1
3.5V
6
GND
GND
8
PDIM #2
24V
10
24V
GND
12
GND
12V
14
12V
12V
16
24V or N.C
GND
18
GND
GND
20
GND
GND
22
L/DIMO_VS
24
L/DIMO_SCLK
The Wafer,18Pin and 24Pin, is used by operating LocalDimming or not
LocalDimming
- 24Pin wafer is applied operating L/D at power and main B/D
- 18Pin wafer is applied not operating L/D at power and main B/D
Established
date
Revised
date
①
③
A25
LGE Internal Use Only
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