Re: Speed Freak

On 12/12/2013 6:54 AM, Marco Vernillo wrote:
> Hi all,
> it's a long time I don't write, that's because I had some raster cabs
> to repair...
> A couple of days ago my Speed Freak decided to die.
> The first symptom was no vectors at all. TV is fully working because I
> tested id with my star hawk PCB
> After I tested Star Hawk I plugged again SF but spot killer lighted on
> permanently.
> After some investigation with my scope I decided to replace RAMs and
> some other components somewhere and now the LED flickers.
> After that I changed a lot of components (all ICs with weak signal or
> I was onvinced were faulty) but nothing changed.
> Board is a revision "K"
> is there a sort of "to do list" to understand where the problem is?
> Are there some check points "suggested" or something similar?
> thank you!!
> regards,
> Marco
>
> ­
>
> Marco M. Vernillo
> R&D Director
> Prisma Engineering
> Via Guido Rossa, 12 - Anzola dell'Emilia (Bologna)
> Tel: +39.051.6502.511
> Fax: +39.051.6502.512
> Mob: +39.346.5027.658
> m.vernillo@prismaeng.it <mailto:m.vernillo@prismaeng.it>
>

You pretty much have to service these boards with the Cinematronics
Exorciser board OR the replacement one manufactured a few years ago by
William Boucher:

http://www.biltronix.com/cinexor.html

I hope that is still available, last update was in 2009...but Bill is
still active here and can chime in (and update his site page).

John :-#)#

-- 
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
                  www.flippers.com
"Old pinballers never die, they just flip out"
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