LG C3400 Service Manual page 75
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Also See for C3400:
- User manual (297 pages) ,
- Specifications (4 pages) ,
- User manual (135 pages)
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4. Troubleshooting
Checking Flow
The level of
pin 3 of U703
YES
Is there voltage level at
Pin 2 or 6 of U703 ?
YES
Is there problem at
YES
Replace CN601
START
NO
is LOW ?
NO
NO
CN601 ?
Replace U101
Is there problem at
C706, C707, C709, C710
R703, R707 ?
YES
Replace U702
Is there problem at
soldering
of speaker?
NO
Is there problem at
speaker?
NO
Speaker will work properly
- 74 -
YES
Replace component
YES
Resoldering speaker
YES
Replace speaker
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