AW: [DSP-10] DSP-10 Completion

[dsp-10@mailman.qth.net]

Hi Dave,

Thanks for the information.  I haven't yet determined what happened to my 
unit.  It was working OK, I shut off the power to do something and when I 
turned it back on the was not working.  I did find a "whisker" from a coax 
shield laying over near pin 1 of the CPU but upon examination of the 
schematic Paul, HB9OMQ sent me I don't see a connection.  So far I have only 
checked continuity from pin 43 of the CPU to pin 33 of P3.  It's there but 
seems intermittent.  I may just have had bad connections with my probes.  I'm 
going to get a set of needle point probes before I try again.  I've already 
blown up one PLL chip trying to measure voltages with my current test leads.

I changed a 100 pin chip in the front panel of a SONY receiver a few months 
ago but it was a struggle for me.  If the problem turns out to be the CPU I 
guess I will give it a try.

Thanks again for the info.

73 de Jess - W4MVB


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