Audio Problems - InFocus ScreenPlay 7205 Service Manual

Audio Problems

No audio or sound is scratchy or distorted .
SP7205 Service Manual
Is there sound? No
Yes
Is there sound No,
from both only
speakers? one
Yes
Problem solved.
Make sure the speaker cable is
connected to the controller ECA.
Replace the controller ECA.
(page 21)
Replace the top case. (page 47)
But note:
A shorted speaker can damage the stereo
audio amp on the controller ECA .
Run the projector with audio for 30 minutes.
If the problem returns, replace both the
controller ECA and the top case if the
resistance across either speaker coil no
longer measures approximately 16 ohms.
61