Tech: Gottlieb

David

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Apr 1, 2004
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Archived from groups: rec.games.pinball (More info?)

Hi all,

Well I fixed the constant beeping problem on the Monte Carlo I picked
up. It turned out to be the U4 chip (Riot 6532) on the cpu board. I
tracked it down to a bad IRQ signal on pin 4 of U4. Thank god for
those "marvin" manuals ... what a great help.

Ok so now that the pin is booting I am having a couple of switch
problems. There are two holes that are not kicking out when the ball
sits in them. They are marked as being switches 25 & 35. They don't
come up in test mode as being closed ... actually switches 05 and 65
do?? I really haven't had a lot of time to locate the problem yet but
thought I would ask opinions as I am at work and really bored. You can
see the switch matrix at http://www.uoguelph.ca/~djwoods/

I know the coils are good at 25 and 35 because I tried grounding them
out and they both fire so it must be a switch issue. On a quick glance
I didn't notice any cut wires but really haven't had a close look yet.
If anyone has any quick suggestions for me to try in the morning it
would be appreciated.

Have a great night all!

Thanks
David
 
G

Guest

Guest
Archived from groups: rec.games.pinball (More info?)

Check all the switches in the column.
I suspect a wheel switch to be closed or have a bad diode.

Peter


"David" <djwoods@uoguelph.ca> schreef in bericht
news:1120013259.622988.16640@z14g2000cwz.googlegroups.com...
> Hi all,
>
> Well I fixed the constant beeping problem on the Monte Carlo I picked
> up. It turned out to be the U4 chip (Riot 6532) on the cpu board. I
> tracked it down to a bad IRQ signal on pin 4 of U4. Thank god for
> those "marvin" manuals ... what a great help.
>
> Ok so now that the pin is booting I am having a couple of switch
> problems. There are two holes that are not kicking out when the ball
> sits in them. They are marked as being switches 25 & 35. They don't
> come up in test mode as being closed ... actually switches 05 and 65
> do?? I really haven't had a lot of time to locate the problem yet but
> thought I would ask opinions as I am at work and really bored. You can
> see the switch matrix at http://www.uoguelph.ca/~djwoods/
>
> I know the coils are good at 25 and 35 because I tried grounding them
> out and they both fire so it must be a switch issue. On a quick glance
> I didn't notice any cut wires but really haven't had a close look yet.
> If anyone has any quick suggestions for me to try in the morning it
> would be appreciated.
>
> Have a great night all!
>
> Thanks
> David
>
 

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