Re: WTB: Magnet Processor board for Sega Twister

In my experience with that (terrible) board, it's ALWAYS been the PAL
chip that was dead/blown out. Unfortunately, it's $40-ish to find
out, and you can't program one yourself because the chip is protected
from being read.

Stern has the tech bulletin on their website here:

http://www.sternpinball.com/downloads/sb91.pdf

You don't have to buy their kit, just get the parts they call out in
the bulletin.

On Sun, 22 Mar 2009 17:06:45 -0700 (PDT), cpiel <cpiel@xxxxxxxxxxx>
wrote:

On Mar 22, 3:59?pm, "vicirel...@xxxxxxxxxxxxxx"
<vicirel...@xxxxxxxxxxxxxx> wrote:
The PAL chip. ?It's custom, can't be read, and hasn't had the code
released, so you have to pay through the nose for it from Stern. ?I'ts
like a $2 part that's like 20x more than (or more, I don't remember)
that from Stern.

There's also a service bulletin for this board that adds a couple
diodes to stop noise feedback that makes the wheel register false
hits. ?You might want to look for that to make sure the board you have
(or get) has this done already.

On Sun, 22 Mar 2009 13:51:56 -0700 (PDT), cpiel <cp...@xxxxxxxxxxx>
wrote:



On Mar 22, 3:47?pm, "vicirel...@xxxxxxxxxxxxxx"
<vicirel...@xxxxxxxxxxxxxx> wrote:
Mountain Coin had these in stock a year or so ago. ?Have them check
all locations.

I *may* have a broken one that I think just needs a new chip if you
just need a physical board and can get (or program) the PAL chip.

On Sun, 22 Mar 2009 13:42:00 -0700 (PDT), cpiel <cp...@xxxxxxxxxxx>
wrote:

cpiel AT verizon DOT net

Thanks- Hide quoted text -

- Show quoted text -

Thanks. ?Any idea what part normally fails on these boards?- Hide quoted text -

- Show quoted text -

Thanks Vic - Do you have (or know where I can get) this service
bulletin? Also, what is the symptom of the PAL going bad? In my
case, the spinning disc spins fine but it no longer becomes magnetic
at the proper times.
.

Relevant Pages

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