Re: Tech Star Wars Help

I don't have a SW schematic in front of me so I'm not sure if this will apply, but on Space Duel and several other Atari vector games, the video section has two 3-pin regulators (probably 7815 and 7915 that can be replaced with 7812 and 7912). When one or both of these regulators fail, the unregulated DC supply going into the DAC circuit manifests itself as severe jitter in the picture.

Also, is your monitor an Amplifone or a WG6100? If it is WG6100, dunno what version your deflection board is, but if it has the so-called "input protection circuitry" (not to be confused with a LV2000), then one of the clamping diodes is probably pooched. Just replace all of the 1N914 diodes and the two germanium diodes (they look the same as 1N914 except they also have a small yellow or red band on them maybe) in the protection circuit or just shotgun the entire board by replacing them all since they are so cheap. Replace 1N914 with 1N4148 generic parts.

I have a detailed parts list with sources here:
http://www.biltronix.com/arcade_electcomp_01.html#wg6100_rebuild_parts

William Boucher
  ----- Original Message -----
  From: Frank Zapotoczny
  To: vectorlist@vectorlist.org
  Sent: Friday, September 18, 2009 8:40 AM
  Subject: RE: VECTOR: Tech Star Wars Help

  Kind of both directions up and down and left and right. I recapped the boards a long time ago and I was going to try that to start along with resoldering the connectors. I will try to get a video today. But it did't look like the vector lines were moving but that the whole picture was jumping.

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  From: owner-vectorlist@vectorlist.org [mailto:owner-vectorlist@vectorlist.org] On Behalf Of Andre Huijts
  Sent: Friday, September 18, 2009 1:36 AM
  To: vectorlist@vectorlist.org
  Subject: Re: VECTOR: Tech Star Wars Help

  A video would sure help. Could you describe how it jumps (left-right/up-down or other way)?

  Op 18 sep 2009, om 03:50 heeft Frank Zapotoczny het volgende geschreven:

  I have a Star Wars upright with a Amplifone monitor. It has a wintron HV installed and had worked great for many years. It has been sitting for a about a year without being played.

   I turned it on to play a few games and the picture came up and looked great but after a few seconds the picture began jumping around and getting shaky. After about 5-10 minutes it stopped moving around and looked great again. Then after a few more minutes it started jumping around again.

   Can you guys give me a suggestion on where to start looking.

  Thanks in advance for any help/

  Frank

  André Huijts

  andre.huijts@upcmail.nl

  =

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Received on Fri Sep 18 20:00:19 2009