User`s manual

Dolby
®
CP650 Digital Cinema Processor User’s Manual Troubleshooting
4-4
Symptom Possible Cause Recommended Action
NO SOUND IN SOME
FORMATS
No Dolby Digital sound
(format 10). Front panel looks
normal, analog film format (05)
plays OK.
No Dolby Digital data available.
Not a Dolby Digital print.
Projector not running.
Digital data on the film badly damaged.
Digital film reader not working.
Film not threaded correctly in digital reader.
Verify that the LED (or exciter lamp) in the digital film reader is on
and that the print you are playing includes Dolby Digital information
and is correctly threaded through the digital reader.
Bypass power button is illuminated,
but the front panel is dark. There is
sound.
System is in Bypass mode. Switch the CP650 out of Bypass mode by pressing the front-panel
bypass power button. Call your service engineer if the system is still
not operating correctly.
FADER PROBLEMS
Front-panel fader knob has no effect. External analog remote fader selected.
Select the front-panel (local) fader by pressing the left menu button to
show the Fader Setting menu, then turning the front-panel knob to
display Local. Press
OK. This will restore volume control to the
main front-panel fader and any digital remotes that are connected.
Fader level display changes when no
change is made to the CP650 front-
panel fader.
A remote digital fader is being operated.
A format with a different fader setting was
selected.
Analog remote fader is selected and being
changed.