Hey Paul,
With regard to the serial 12,000 number change, I found this note on play-back:
When the serial number of this unit is lower than 12001
Double-speed playback requires the HKSR-5803HQ
(option).
• When the serial number of this unit is 12001 or higher
Double-speed playback is standard and does not require
the HKSR-5803HQ (option).
• The DIGITAL I/O (AES/EBU) INPUT/OUTPUT
connectors cannot be used for double-speed playback/
recording.
• Only a limited number of devices can support signals
processed for double-speed playback.
And:
HKSR-5802 Digital Betacam/HDCAM Processor
Board
This allows you to play back Digital Betacam or HDCAM
tapes and output SD and HD signals.
When the system is operated in 4:4:4 mode, up conversion
of the output to HD signals are possible as follows,
depending on the system setting.
1080: Up conversion to 1080.
720: Up conversion to 720P.
When the system is operated in 4:4:4 mode, no upconverted
HD output can be obtained.
Based on this I’m wondering whether you are doing a up-convert and/or cross-convert?
Like a NTSC Digital Betacam 30 fps to HD 23.97fps?
You might already have looked at this menu, but repeating just in case:
The audio signal output status is specified by the following
settings of the VTR SETUP menu item 017 “PB/EE
SELECT MENU”.
EE: The input audio is always output.
MU: The audio output is always turned off.
PB: The playback signal is always output.
If brave, you could consider a “Factory Reset”, but is likely to come with a “Point of NO Return” attched…
If all of that fails, it may be a faulty switch or a sticky button that needs a good clean.
Although, if you “can hear through the AES/EBU out and the SDI embedded audio the tapes’ audio.” then it might just be easier not to fix something that is not broke, although you can’t use the Phones out. At least you’ll be able to continue to do the work…
Hope that this helps?
atb
Mads