RE: WG 6100 HV help please

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 08:57:47 2002