LG 42LN5700 (CHASSIS:LJ33B) Service Manual ▷ View online
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Check power input voltage and ST-BY 3.5V
B. Power error _No power
A18
Established
date
Revised
date
Error
symptom
Content
LCD TV
For 13’ models, there is no voltage out for st-by purpose.
When st-by, only 3.5V is normally on.
Edge LED
2012. 12 .21
Edge LED
Standard Repair Process Detail Technical Manual
18 or 24 Pin
(Power Board ↔ Main Board) -
공통
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
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Checking method when power is ON
B. Power error _No power
A19
Established
date
Revised
date
Error
symptom
Content
LCD TV
Check “power on” pin is high
2012. 12 .21
Edge LED
Edge LED
Standard Repair Process Detail Technical Manual
18 or 24 Pin
(Power Board ↔ Main Board) -
공통
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
27 / 97
Entry method
1. Press the IN-START button of the remote controller
for adjustment
2. Check the entry into adjustment item 3
POWER OFF MODE checking method
B. Power error
_Off when on, off whiling viewing
<ALL MODELS>
A22
Established
date
Revised
date
Error
symptom
Content
LCD TV
2012. 12 .21
Standard Repair Process Detail Technical Manual
28 / 97
Checking method
1. Press the MENU button on the remote controller
2. Select the SOUND function of the Menu
3. Select TV Speaker from Others
2. Select the SOUND function of the Menu
3. Select TV Speaker from Others
Checking method in menu when there is no audio
C. Audio error_No audio/Normal video
<ALL MODELS>
A24
Established
date
Revised
date
Error
symptom
Content
LCD TV
2012. 12 .21
Standard Repair Process Detail Technical Manual
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