Re: Tempest Boards

Thanks Rodger. Yes already done this.

Fred

----- Original Message -----
From: "Rodger Boots" <rlboots@cedar-rapids.net>
To: <vectorlist@synthcom.com>
Sent: Sunday, March 02, 2003 2:47 AM
Subject: Re: VECTOR: Tempest Boards

> Jilayne Stanclif wrote:
>
> > I don't know if its just me or everyone, but I have the hardest time
> >repairing Tempest's and SW.
> >
> > Maybe someone with a bit more logged time on Tempest repair can help
me
> >out.
> >
> > Here is what I have.
> >
> > I have one complete working Tempest board so I check out the
aux(smaller
> >pcb with Pokeys) pcb on the bad boardset and it works.
> >
> > Problem is definitely on the main big PCB.
> >
> > Roms are known good as I tested them on my working board.
> >
> > Watch dog does not reset. Using oscope for display so I know that
works.
> >Cpu is good tested that on the other boardset.
> >
> > Displays a bit of junk then the dot just floats around a bit.
> >
> > I think its in the Vector timing or that part of the circuit. Anyone
> >have a faq or known area that is problematic. I don't see any stuck high
or
> >low pins anywhere and I find it hard to believe that both the X and Y
dac's
> >and amps would be bad.
> >
> >Thanks,
> >
> >Fred
> >
> >
>
>
> You may have already done this, but the FIRST thing to do on a Tempest
> is to resolder the Molex connectors where the ribbon cable connects the
> main to the aux board. These almost always have cracked solder joints.
> Don't just reflow, wick them off and use fresh solder, preferably 63-37
> alloy.
>
>
>
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Received on Sun Mar 2 08:01:18 2003