[time-nuts] SR620: Cal Error 07 in Self Calibrate routine

[James Robbins]

My SR620 fails to complete its Self Calibration Routine by showing "Cal
Error 07".  It won't proceed beyond that point, although at times it will
jump to Cal 13-16 programs.  Cal Error 07 is listed as flagging "hardware
problems" in the "Start TAC" (Time to Amplitude Converters) which are "the
cirsuits which perform the analog interpolation between the 90 MHz clock
tics."  Anyone have any ideas on how to track this problem down?  Also, I
have the "Manual" for this unit but can't find the "Service Manual" online.
Any help would be appreciated.  Jim Robbins