Samsung PL43E400U1F Service Manual page 23

■ No Sound
•
Symptom
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•
Major Checklist
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•
Diagnostics
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Video is normal but there is no sound.
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.
Speaker
Is the ca ble conne ction be twe e n
Main boa rd a nd the s pe a ke r
prope rly conne cte d?
Ye s
Is th e output volta ge of S MP S norma l?
(CN801 P IN 7 : 15V)
Ye s
(1)
Is the s pe a ke r output te rmina l of
the Ma in boa rd norma l?
Ye s
Re place the S pe a ke r.
Speaker Cable
<Rear view of 43">
No Conne ct the ca ble prope rly or
re place the ca ble, if ne ce s s a ry.
No
No
So und Output Sh a pe
(1)
4. Troubleshooting
CN801
Re place the S MP S .
Re place the Main boa rd.
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