Vintage Synth Repair

It's brilliant for troubleshooting down to component level on old
processor based digital circuits. You need a 9010a and the relevant
CPU specific Pod. $850 is a lot of money. I have spare 9010 for sale
for £120. Pods are extra.

--- In vintagesynthrepair@yahoogroups.com, "Frank Simon"
<fsimon001@...> wrote:
>
> does the 9010a troubleshoot to the component or just tell you there
is trouble on the Data Bus. I saw one for sale $850. That's a lot of
money.
>   ----- Original Message ----- 
>   From: Philip 
>   To: vintagesynthrepair@yahoogroups.com 
>   Sent: Sunday, June 01, 2008 2:24 PM
>   Subject: Re: [vintagesynthrepair] Prophet 10 dead
> 
> 
>   A quick google of spec sheet reveals that it is
>   basically a cmos 2114 so you'd be looking at a 5114 or
>   a 5514 and variations of that. See this is where the
>   fluke 9010a comes in handy..It can check and resolve
>   this kind of problem in minuites :)
> 
>   Thanks, Phil.
> 
>   --- Frank Simon <fsimon001@...> wrote:
> 
>   > I did find a chip pulling down DB4 on U311 it is a
>   > 6514 4K CMOS RAM. Thank god for IC sockets. The only
>   > problem I'm a little confused on a cross for it. It
>   > appears obsolete. It is called D444C on the chip and
>   > 6514 on schematic. Can anyone offer advice on a
>   > cross.
>   > ----- Original Message ----- 
>   > From: fsimon100 
>   > To: vintagesynthrepair@yahoogroups.com 
>   > Sent: Friday, May 30, 2008 8:58 AM
>   > Subject: [vintagesynthrepair] Prophet 10 dead
>   > 
>   > 
>   > Was curiouse if anyone can offer help. I bought a
>   > dead P10 no lights 
>   > or anything. The processor is good. I put logic
>   > analyzer on decoder 
>   > output and see ROM1 (Y0) and RAM (Y5)(which I
>   > believe is the scratch 
>   > pad memory)active at start up. All address buses
>   > and Data buses are 
>   > active. I am not certain the algorithm. A flow
>   > chart would be nice or 
>   > some help with what I should see at some critical
>   > points. I am 
>   > wondering if there is a chance the ROMs lost
>   > programming and how would 
>   > I know. Even if they did shouldn't lights and/or
>   > display come on. And 
>   > yes the power supplies are good.
>   > 
>   > 
>   > 
>   > 
> 
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