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Standard Repair Process Detail Technical Manual
Error symptom
symptom
TV
Content
Content
Checking order when there is no audio
1. Check the contact condition of or 20V connector of Main Board.
2. Measure the 13.2V output voltage from Power Board.
(If there is no input voltage, remove and check the connector.)
3. Connect the speaker terminal and if you hear the 'Chik~ Chik~' sound when you
touch the GND and output terminal, the speaker is normal.
Error
C. Audio error_No audio/Normal video
C. Audio error_ No audio / Normal video
Voltage and speaker checking method
Voltage and speaker checking method
when there is no audio
when there is no audio
P201
P202
P251
P252
②
SK100
Established
Established
date
date
Revised
Revised
date
date
①
1
3
5
7
9
11
A12
SPK_R-_FT
2
SPK_R+_FT
SPK_L-_FT
4
SPK_L+_FT
SPK_R-_CT
6
SPK_R+_CT
SPK_L-_CT
8
SPK_L+_CT
SPK_R-_TW
10
SPK_R+_TW
SPK_L-_TW
12
SPK_L+_TW
Copyright © 2023 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
A12
A21
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