Re: Tempest foldover on right side

Don't always assume that a recently replaced part is 100% good, i would still replace the transistor with another one as a way to eliminate that possibility.. you just never know :-)

Andrew Welburn
www.andys-arcade.com
  ----- Original Message -----
  From: Kevin Moore
  To: vectorlist@vectorlist.org
  Sent: Wednesday, December 16, 2009 1:18 PM
  Subject: Re: VECTOR: Tempest foldover on right side

  Well the rom set is V2, good point on the boundary limit. I don't recall off hand, but when I get home tonight, I'll tape off the bounding box on the screen, and see. Wouldn't think it would be the Deflection trans, as I replaced all the Transistors with new when I re-capped, and did the LV upgrades. Don't think I have any V3 roms handy, but I'll check and see if that makes a difference.

  Thanks for the input, gives me a few things to check.

  Kevin

   
  On Wed, Dec 16, 2009 at 2:43 AM, Andrew Welburn <andy@andysarcade.net> wrote:

    If its bothersome, you could try replacing the relevant chassis deflection transistor, i've seen that before. Tempest unfortunately will force the monitor to display vectors way, way outside the visibile screen area, later romsets IIRR have a fix for this. Even if your monitor can produce a full image, certain parts of the game will overdrive the deflection such that the transistors will partially break-down, causing other areas of the screen to show foldover like this.

    Its not clear if your boundary is inside or outside the real screen limit anyway without a photo. you should set the test mode pattern up to fill your screen then watch it in game, is the foldover inside this box?

    I'd replace the relevant chassis transistor first with a new one then observe... Changing the romset to a later revision might also help, but this is much more laborious, and is ignoring a weakness in your monitor anyway.

    Andrew Welburn
    www.andys-arcade.com
      ----- Original Message -----
      From: Kevin Moore
      To: vectorlist@vectorlist.org
      Sent: Tuesday, December 15, 2009 6:53 PM
      Subject: VECTOR: Tempest foldover on right side

      I've noticed that Tempest has a slight foldover when the player finishes a level, and the tube starts coming up. The left side the tube lines go infinity for lack of a better word, but the right side seems to fold over like hitting a wall, and it creates a straight line. Typically I just adjust the picture so that the monitor shroud covers this. Is this normal?

      Thanks,

      Kevin

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Received on Wed Dec 16 08:31:16 2009