Re: WG 6100 HV help please

Joe,

As detailed in the Wells-Gardner 6100 FAQ that I updated on my site:

--------------
On the HV circuit board there are two diodes D901 and D902, which the Atari
TM-183 manual does not identify. They are just referred to as "silicon diodes".
Apparently the replacement for these is NTE558 – a 1500V general-purpose silicon
rectifier in a DO41 package.
--------------

http://www.ionpool.net/arcade/tech/6100_faq.pdf

tm

"Bachmann, Joe" wrote:

> What is a suitable replacement for D901 and D902?
> Also, is there any other replacement for the 2N6557 other than the NTE part?
>
> Thanks,
> JB
>
> -----Original Message-----
> From: steve@coule.freeserve.co.uk [mailto:steve@coule.freeserve.co.uk]
> Sent: Monday, October 28, 2002 9:36 AM
> To: vectorlist@synthcom.com
> Subject: Re: VECTOR: WG 6100 HV help please
>
> Joe,
>
> I had a real struggle with a 6100 HV unit .. wouldn't go below 24kv, then
> not above 12, then not above 16 ... finally fixed it!
>
> In fixing all of those I changed the zener diodes, both the two 13v and the
> single 150v (low and high problems respectively I think) and also the BU409
> .. and obviously all of the electrolytic caps ... I may also have changed
> some of the MPSA06/56 small transistors .. it felt like virtually every bit
> of silicon on the HV board!
>
> I think it's unlikely that the non-adjustable 16kv is a deflection board
> issue, check all the HV zeners, transistors and electrolytics first.
>
> Steve
>
> >
> > From: "Bachmann, Joe" <Joe.Bachmann@citadelgroup.com>
> > Date: Mon 28/Oct/2002 15:12 GMT
> > To: vectorlist@synthcom.com
> > Subject: VECTOR: WG 6100 HV help please
> >
> >
> > I am having trouble with 3 HV units. I can only get 16kv out of them and
> can
> > not adjust the HV higher or lower. I believe the issue was caused by a bad
> > deflection board. I have checked Q900-905 and the resistors mentioned in
> the
> > flowchart as well as the 160v 33uf cap. All are good. What am I missing?
> >
> > One of the units was working until I removed it from a working game and
> > tested it with the deflection board I was working on. Is it possible that
> > the deflection board damaged the HV unit somehow, or just a coincidence?
> >
> > Thanks,
> > JB
> >
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Received on Mon Oct 28 09:18:21 2002