Thanks for the tip on this, I checked all the related traces from D00-D07, and they check out fine. The CPU visually appears to be ok, and I have checked all traces from the CPU (directly with it plugged into the socket) to any component.
Also, I'm replying to paul's post with more details on my problem.
--- In PolySix@yahoogroups.com, "Andrew Jury" <andy@...> wrote:
>
> Hi,
>
>
>
> Might I suggest, before you do anything else, check the continuity of the
> tracks that form data bus D00-D07. Pay particular attention to the area
> around IC30/31, especially if you have had a battery leak. In my experience,
> if you think you might have a problem with the CPU, first remove it and
> replace the 40 pin socket making sure that the underside is free from
> battery electrolyte. Solder in a new socket and monitor the i/o bus P20-P27
> for data activity with either a logic probe or scope. I would be surprised
> if the CPU has failed, however, would not be surprised if you still have a
> track disconnection!
>
>
>
> Let us know how you get on....
>
>
>
> Cheers,
>
> Andy
>
>
>
> From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
> mack_sass
> Sent: 14 November 2009 01:03
> To: PolySix@yahoogroups.com
> Subject: [PolySix] Battery problems
>
>
>
>
>
> I have been working off and on at fixing my battery issue for the past few
> months...replacing parts etc.
>
> I have not been able to get ANY sound from the poly six at all. In addition
> to this, the controls are unresponsive and the lights are erratically on or
> off. I suspect possible problems with the 8048 CPU. I have heard conflicting
> reports on this, but with batter leak damage, shouldn't I expect to heard
> SOMETHING when pressing keys?
>
>
>
>
>
> [Non-text portions of this message have been removed]
>