On 12/02/2012 02:08 PM, firstname.lastname@example.org wrote: > > On 2012-12-02, at 13:56, Gerrit Heitsch wrote: > >> I replied directly since I didn't want to post a 500K picture to the list. > > As far as I know Uz, I'd expect the list not to let you anyway ;-) > >> If someone else would like a picture of the KU board, send me an email. > > If you agree I can put it online and post a link here. The board isn't mine, I only had it for repairs. I also have a hires JPEG (5MB) of it in case someone would like it. There is also a detail about the KU board that everyone who owns one should address as quickly as possible: Next to the 74LS629 (inside the VIC 'can') are 2 capacitors, C107 and C108 (10”F/25V). The original capacitors on the board I photographed were small and black. And they leaked... the stuff from C107 had eaten through a trace and resulted in pin 15 of the 74LS629 no longer getting about +4V. Result: No 17.734 MHz clock signal since the oscillator didn't start. They don't leak much since they are so small, the damage was not visible until I removed the caps from the board. Since then other people on the forum64 have reported the same leaking problem on their KU boards. So if you have a KU board, replace C107 and C108 (also clean away any leakage). They are also present on the 250407, but are a different kind, haven't seen any leaks there yet. Good idea to check anyway. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2012-12-02 14:00:41
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