Re: Asteroids Deluxe / V2000 problem

You should take a picture of it in test mode, the crosshatch shows up whats going on a lot better for me.

Is the game pcb 100% ok? slim chance its an op-amp in the DAC section.

 It looks just like one of the monitor chassis transistors failing at the top end of its range/spec. You say you've changed the u57/u07 but don't mention anything about the 3716/3792? I'd guess you have a marginal chassis transistor that may well probably check good when metering out of circuit, but it will fail under stress in operating conditions, i have had this before.

--
Andrew Welburn
http://www.andys-arcade.com
  ----- Original Message ----- 
  From: Scott Zeiser 
  To: vectorlist@vectorlist.org 
  Sent: Saturday, November 27, 2010 2:10 PM
  Subject: VECTOR: Asteroids Deluxe / V2000 problem
  Anybody ever seen this before?
  http://www.youtube.com/watch?v=VH24sa23Er8 (Watch the left side of the screen)
  Monitor has been recapped, new HV diode, new deflection power transistors (U07/U57s), new big blue, AR-II board and game board have also been capped.  Problem has only gotten worse -- video is out of date, now the left 1/4 of the screen is crushed in.  Test pattern shows up normally for the most part, it's not as smashed in as the game is, but the left edge sort of pulsates back and forth...
  Recently picked up a cheap non-working AD board from ebay and repaired it.  Backup board exhibits the same behavior, which points back to the monitor.  But then recently I've had a friend swap in their deflection board and HV cage with no change.
  Any ideas?
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