Re[2]: g05 v2000 spot killer problems

-----Original Message-----
From: Rodger Boots <rlboots@cedar-rapids.net>
To: vectorlist@synthcom.com
Date: Wed, 21 Aug 2002 13:43:13 -0500
Subject: Re: VECTOR: g05 v2000 spot killer problems

>
> James G Watt wrote:
>
> >I've got 2 monitors both with malfunctioning spot killers. It was
> >sugested to me that I replace all the transistors in the spotkiller
> >circuit to get rid of the problem. Having some trouble finding the
> >transistors though.
> >
> >G05 Spot Killer. This spot killer activates continually. When I disable
> >the circuit the monitor works perfectly:
> >
> >Q500 (NPN) TPS 98 NTE194 is this right? (2SC2240) RS: 197-9828
> >
>
> I would tend to say MPSA42 is the best Radio Shack replacement.
>
> >Q501 (NPN) TPS 98 NTE194 --
> >Q502 (PNP) 2n3906 NTE159 RS: 294-328
> >Q503 (NPN) MPSU03 2SA1306B ??
> >Q504 (NPN) MPSU03 2SC3298B ??
> >
> >
> >V2000 Spot Killer. This spot killer appears to work correctly except it
> >is to sensitive. When playing asteroids everything's fine until you get
> >to the last asteroid. When the screen is empty like that the spotkiller
> >starts to activate intermittently.
> >
> >
>
> You might try adjusting centering IF there are centering pots on the
> game board. The object here is to have the spot killer work off the
> small amounts of signal present to the spot killer when items are only
> being drawn in one quadrant. The score display alone should keep the
> horizontal axis alive, so you would need to LOWER the picture slightly
> to satisfy the vertical spot killer. The display can then be moved back
> up using the centering rings, if desired.
>
>
sensitivity can also be effected by small capacitors changing value in the
spotkiller circuit!

re-cap the spotkiller first!!!

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Received on Wed Aug 21 22:46:10 2002