LG 47GA6400-UD / 47GA6450-UD (CHASSIS:LA37G) Service Manual ▷ View online
GA6400 : 18P
GA7900 : 24P
Standard Repair Process Detail Technical Manual
Checking method when power is ON
B. Power error _No power
A19
Established
date
Revised
date
Error
symptom
Content
LCD TV
A19
Check “power on” pin is high
2011. 12 .14
<GA64/7900>
Entry method
1. Press the IN-START button of the remote controller
for adjustment
for adjustment
2. Check the entry into adjustment item 3
Standard Repair Process Detail Technical Manual
POWER OFF MODE checking method
B. Power error
_Off when on, off whiling viewing
A22
Established
date
Revised
date
Error
symptom
Content
LCD TV
A22
2011. 12 .14
<GA64/7900>
Checking method
1. Press the menu button on the remote controller
2. Select the Settings -> Picture & Sound -> Sound adjustment -> Sound setting
3. Select TV Speaker from Off to On
Standard Repair Process Detail Technical Manual
Checking method in menu when there is no audio
C. Audio error_No audio/Normal video
A24
Established
date
Revised
date
Error
symptom
Content
LCD TV
A24
2011. 12 .14
<GA64/7900>
GA6400 : 18P
GA7900 : 24P
Checking order when there
is no audio
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.
and output terminal, the speaker is normal.
Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
when there is no audio
C. Audio error_No audio/Normal video
A25
Established
date
Revised
date
Error
symptom
Content
LCD TV
A25
①
②
③
2011. 12 .14
<GA64/7900>
Click on the first or last page to see other 47GA6400-UD / 47GA6450-UD (CHASSIS:LA37G) service manuals if exist.