Samsung UN46C7000WF Service Manual page 96

4-1-8. No Sound
Symptom
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-
Major
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checkpoints
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Diagnostics
0
!
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Caution Make sure to disconnect the power before working on the PD board.
Notice Refer to the next page for detailed locations.
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..
No sound
Yes
Check the sound source and
check the connection of
sound cable?
Yes
Does the signal appear at R463,R464?
Yes
Does the digital data
appear at R319, R320, R321?
Yes
Does the signal appear at
pin1~4 of cn302?
Yes
Replace the speaker.
Input a sound signal.
No
Check the connected cable.
No
Change the CN407 or
the main PCB assy.
Change CN302 or
No
the main PCB assembly.
Change IC303 or
No
the main PCB assembly.
No
Please, contact Tech support.
4. Troubleshooting
4-31