Sony DFP-R3000 Quick Start Manual page 20

7. Troubleshooting.
Experienced cinema engineers will have their own methods and styles of
troubleshooting. Here are some tips that relate to the SDDS format and the DFP-D2500
system.
Problems with playing SDDS. First, ensure that the film actually has SDDS tracks on
it. These tracks are the light blue or cyan areas at the outside of both rows of sprocket
holes. The white spots are very small, but you should be able to see a fine granularity in
this area.
The DFP-D2500 is furnished with an SDDS status indicator, which indicates the error
rate of the two tracks of SDDS ("P" for picture-side track, and "S" for sound-side track)
on the film print (given that the playback equipment is aligned and set-up properly). See
page 6 in the DFP-D2500 Operation Manual for further details.
During normal operation, only the green LED's should be illuminated while playing an
SDDS encoded film print. This indicates error free condition of the two SDDS tracks.
Occasionally, either P or S track indicators may flash yellow or red momentarily. This
indicates some error has been detected.
When one of the track indicators is in the red area for any duration (either momentarily,
or for an extended duration), the SDDS system will continue to playback the full eight
channel output in SDDS digital sound, by using it's robust digital concealment (DCM)
method of 100% data redundancy.
If however both indicators are in the red area simultaneously for a duration of a second
or more, it indicates that both SDDS tracks are either corrupted or missing completely.
In this event, the decoder will switch to the AUX input seamlessly to conceal the
corrupted track.
Report any print problems to your local film print dispatch to get a replacement print or
reel and/or to notify the film distributor of prints not complying to the standard.
If the indicators are never out of the red area regardless of the film print, it indicates a
potential problem with the DFP-D2500/DFP-R3000 playback hardware or its installation
or alignment. See the DFP-R3000 Installation Manual and DFP-R3000 Maintenance
Manual, or contact us for further information.