LG 70LA8600-SA (CHASSIS:LJ34D) Service Manual ▷ View online
Standard Repair Process Detail Technical Manual
POWER OFF MODE checking method
B. Power error
_Off when on, off whiling viewing
A14
Established
date
Revised
date
Error
symptom
Content
LCD TV
2012. 11 .17
g
< Low models >
date
Entry method
1. Press the IN-START button of the remote
controller for adjustment
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controller for adjustment
2. Check the entry into adjustment item 3
Standard Repair Process Detail Technical Manual
Checking method in menu when there is no audio
C. Audio error_No audio/Normal video
A15
Established
date
Revised
date
Error
symptom
Content
LCD TV
2012. 01 .14
g
<LA613x>
date
Checking method
1. Press the MENU button on the remote controller
2. Select the AUDIO function of the Menu
3. Select TV Speaker from Off to On
2. Select the AUDIO function of the Menu
3. Select TV Speaker from Off to On
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Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
C. Audio error_No audio/Normal video
A16
Established
date
Revised
date
Error
symptom
Content
LCD TV
2012. 11 .17
when there is no audio
<Low models>
date
①
②
②
①
②
②
③
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)
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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
Remote controller operation checking method
D. Function error_ No response in remote controller,
key error
A17
Established
date
Revised
date
Error
symptom
Content
LCD TV
2012. 01 .14
Remote controller operation checking method
< Low models >
date
②
P600
1
GND
2
KEY1
3
KEY2
②
③
4
St 3.5V
5
GND
6
RED_LED
7
IR
8
GND
③
④
8
GND
Checking order
1, 2. Check IR cable condition between IR & Main board.
3. Check the st-by 3.3V on the terminal 6.
4. When checking the Pre-Amp when the power is in ON condition, it is normal when the
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Analog Tester needle moves slowly, and defective when it does not move at all.