Samsung PS51D6900DS Service Manual page 24

■ No Sound
•
Symptom
•
•
Major Checklist
•
•
Diagnostics
CAUTION
Make sure to disconnect the power before working on the IP board.
Copyright© 1995-2011 SAMSUNG. All rights reserved.
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.
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 7pin : 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.
No
Conne ct the ca ble prope rly or
re place the ca ble, if ne ce s s a ry.
No
Re place the S MP S .
No
Re place the Main Boa rd.
4. Troubleshooting
Sound Output Shape
(1)
4-5