Re: B&K adaptor for Asteroids monitor rejuvination?

That sounds like a MPU board problem. I don't think there are many failures
in a monitor that can be that specific to the end of a trace...the only
possible monitor problem would be the drive transistor for the cathode,
maybe it is slow to turn off.

John :-#)#

At 03:37 PM 10/5/00, Gregg Woodcock wrote:
>It is hard to explain, really. At all the joints of the vectors there are
>random bright flashes (think Galaga star background). It is not connectors
>nor the HV diode (I am certain it is NOT on the HV unit at all)...
>
>----- Original Message -----
>From: "John Robertson" <jrr@flippers.com>
>To: <vectorlist@synthcom.com>; <vectorlist@synthcom.com>
>Sent: Thursday, October 05, 2000 10:36 AM
>Subject: Re: VECTOR: B&K adaptor for Asteroids monitor rejuvination?
>
>
> > Do you mean the picture is jerking around-the vectors shift at random? If
> > that is the case then you probably have the standard Monitor MotherBoard
> > Curse-caked solder connections on the pins of the Molex connectors.
> > Resolder ALL the pins on the MMB!
> >
> > If the screen changes focus or expands and contracts at random, yet the
> > output screen voltage of the HV unit is stable then you have a bad HV
> > diode, and need to track one down. The archive here has the sources of
>those...
> >
> > John :-#)#
> >
> > At 11:52 PM 10/4/00, Gregg Woodcock wrote:
> > >----- Original Message -----
> > >From: "John Robertson" <jrr@flippers.com>
> > >To: <vectorlist@synthcom.com>; <vectorlist@synthcom.com>
> > >Sent: Wednesday, October 04, 2000 10:19 PM
> > >Subject: Re: VECTOR: B&K adaptor for Asteroids monitor rejuvination?
> > >
> > >
> > > > This is a standard B&W tube AFAIK. Where is the short? If it's between
>the
> > > > heater and the cathode you CAN'T fix it by rejuvenating, you will
>destroy
> > > > the heater. To repair that you need a 1:1 isolation transformer
>designed
> > > > for filaments.
> > >
> > >It is adapter #6 FYI. I don't know for sure it is a short but the screen
>is
> > >"sparkling" and
> > >"zapping" like crazy. It is possible it is a problem on the deflection
> > >board, though, since
> > >the 470 didn't find any shorts...
> > >

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

---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to neil@synthcom.com.
Received on Thu Oct 5 19:38:41 2000