Read LG 42LN5700 (CHASSIS:LJ33B) Service Manual online
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18 or 24 Pin
(Power Board ↔ Main Board) -
공
통
SMAW200-H24S (YEONHO)
1
PWR ON/OFF
2
DVR ON/OFF
3
3.5V
4
PDIM #1
5
3.5V
6
PDIM #2
7
GND
8
GND
9
24V
10
24V
11
GND
12
GND
13
12V
14
12V
15
12V
16
24V or N.C
17
GND
18
GND
19
GND
20
GND
21
GND
22
V-SYNC
23
SPI-SIN
24
SPI-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
Standard Repair Process Detail Technical Manual
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.
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
LCD TV
①
②
③
②
2012. 12 .21
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