4-1-8. No Sound
Symptom Video is normal but there is no sound.. -
Major
checkpoints
When the speaker connectors are disconnected or damaged.
-
When the sound processing part of the Main Board is not functioning.
-
Speaker defect.. -
Diagnostics
Change the CN407 or
the main PCB assy.
No
Yes
No sound
Yes
Check the sound source and
check the connection of
sound cable?
No
Input a sound signal.
Check the connected cable.
Yes
Replace the speaker.
Please, contact Tech support.
No
Does the digital data
appear at R319, R320, R321?
No
Change CN302 or
the main PCB assembly.
!
Does the signal appear at R463,R464?
Yes
Does the signal appear at
pin1~4 of cn302?
No
Change IC303 or
the main PCB assembly.
@
Yes
0
Caution Make sure to disconnect the power before working on the PD board.
Notice Refer to the next page for detailed locations.
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