Dolby Laboratories CP650 User Manual download pdf (Page 24)

CP650 User’s Manual Troubleshooting

4-4

Symptom Possible Cause Recommended Action

NO SOUND IN SOME

FORMATS

No Dolby Digital sound (Format

10). Front panel normal, analog film

formats (05) play 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.

Power button illuminated. Front

panel dark. There is sound.

System is in Bypass operation. Turn on the CP650 by pressing the front-panel power button. Call

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 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 the OK button. 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.

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Dolby Laboratories CP650 User Manual Page 24