Here's the reply of Sony's Regional Service Manager for (West Coast) Pro Audio to my email requesting clarification of how my 'clock issue' problem would be handled. You will recall I had sent him a complete description of the failure modes, as well as the comments of other users here with the same problem, in multiple units, including those who had previously contacted Sony with the same issue, and the comments of Sony Product Operation Support regarding possible EPROM or clock oscillator problem source. His initial response to me had been 'we have never heard of this before, seems like an internal battery problem, send it to us' and I had again asked what it would cost for warranty service.
"[...] I have presented your situation to the sustaining engineer for the product and he has not heard of this problem either. He did ask to verify that you were following the precise steps for setting the clock. His comments:
"I have never heard of this as a problem but I have ran into this in the past and the problem was in not following the clock settings correctly. After setting the clock the user must press the ENTER (Play) key else if they press any other key prior to pressing the ENTER key the clock setting will be aborted. A proper clock setting must be executed in order for the unit to retain proper clock data."
Since the unit was purchased over 90 days ago, it is still within the parts warranty, but out of the labor warranty. The labor charge would be $90.
Regards,
Steve
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Words fail me.
TG