EPSON ELP-3500 Service Manual
4-6
Figure 4-5.
Go to “Picture Quality.”
Audio Mode
START
(Video is OK.)
Is speaker output OK?
Reconnect CN400 on the
main board.
Is speaker output OK
now?
Replace the speaker.
Is speaker output OK
now?
Check fuse FU501 on the
main board. If blown,
replace main board.
NO
NO
NO
YES
YES
YES
NO
NONO
NO
Is audio out OK?
Reconnect CN501 on
the main board.
Is audio out OK now?
Replace the interface
unit.
YES
YES
YES
YES
Replace the main board.
Replace interface unit.
Is speaker output OK
now?
Is speaker output OK?
NO
NO
YES
YES
Does the volume
adjustment work
with the remote
control?
Replace the remote
control.
Does the volume
work now?
Replace the main
board.
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