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XF551 Issues Update

XF551s

It’s been a couple weeks now since the discovery that there is a problem with previously released XF551 boards.  I have heard from four people.  One said he wasn’t having any problems no fix needed.  Great!

One said he was having problems with both his modern and original power supply boards.  He robbed the correct part off one of his original XF551 and place it in his modern power supply remake and it seemed to solve the problem.   The board now will read/write/format disks.  Then he indicated that he was now getting intermittant garbling in his SIO2SD video display when my board was connected but not when he used an original XF551.  And no problem with normal computer video with either XF551 connected w/o the SIO2SD.  Not sure what’s going on there.  Trying to nail down exactly what’s connected and how it’s configured.  Even the slightest thing could be creating a problem there.   His original power supply remake board seems to be having more problems after the fix parts I sent.  Again trying to nail down what it is or is not doing.  The time difference between Europe and the USA slows down communication.

The third has two original power supply remake boards and while one has the fix and the other doesn’t he is saying both are supposedly having SIO errors that is slowing reading and writing down by a third.  I cannot duplicate his issue on my test board.  I may have made an error on the first board I sent him, but I tested the hell out of the second since that was when I discovered the write/format problem.

The fourth person is unwilling to troubleshoot and simply wants me to retrofit the fix.  I have advised him to send the board back and I would fix/verify that the drive board is functioning properly.

The fix works.  But….   Thirty plus years of wear and tear on moving parts and electronics, 3rd party devices never dreamt of when the Atari computers were first manufactured and simple human error are conspiring to create a confusing picture.

Arghhhhhh……

 

 

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