Re: TECH: what the hell is going on with my sys80 CPU!???

I agree with Dan here. Except my nemesis is the Sys11 CPU board. I had one with that came up with a U10 failure message on occasion. I checked the U10 PIA, all the associated chips in the circuit, the incoming 5V, the 12v, changed the 5v filter cap, changed a resistor out of spec. on the 5v circuit, and still never resolved the problem.

The odd thing is that I just looked a Cyclone last week, and it came up with a U10 failure message once out of approx. 40 - 50 power cycles. The odd thing is that the original problem child was an 11B too. Is there some kind of bad design that this happens on 11B's, or was I just lucky? :-|

The main problem with Sys80's is they just don't like to tell you what's up when they're sick.

Jim
CARGPB35


Dan Beck wrote:
Hi Vince,

maddening yes, but that's the fun! "Hurts so good", to paraphrase a mediocre John Mellencamp song...

Please check the message I posted before about the traces on your board.

I also forgot to say...I heard band saws prefer to eat WPC-95 boards, so please avoid feeding it System 80 boards... :-)

Best,
Dan

.

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