4. Troubleshooting
■ No Sound
Symptom
•
Video is normal but there is no sound.
Major Checklist
•
When the speaker connectors are disconnected or damaged.
•
When the sound processing part of the Main Board is not functioning.
•
Speaker defect.
•
SMPS not supplying voltage to the main board.
Diagnostics
Speaker Connector
Ye s
Ye s
Ye s
Re pla ce the S pe a ke r.
Re pla ce the S MP S .
Is th e output volta ge of S MP S norma l?
(CN801 P IN 7 : 15V)
Re pla ce the Ma in boa rd.
(1)
Is the s pe a ke r output te rmina l of
the Ma in boa rd norma l?
Conne ct the ca ble prope rly or
re pla ce the ca ble , if ne ce s s a ry.
Is the ca ble conne ction be twe e n
Ma in boa rd a nd the s pe a ke r
prope rly conne cte d?
No
No
No
S ound Output S ha pe
(
1)
CAUTION
Make sure to disconnect the power before working on the IP board.
4-5
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