x y adjustment pots on a major havoc (tempest conversion) where are they?

tron guy

Super Moderator
Staff member

Donor 12 years: 2011, 2015-2025
Joined
Jun 26, 2007
Messages
23,144
Reaction score
2,592
Location
Eureka, California
x y adjustment pots on a major havoc (tempest conversion) where are they?

This could have fallen in general repair or monitors, since it affects how my game is displayed on the monitor I put it here.

Anyway, I don't have a proper adjustment to my monitor(6100).

I can't find the adjustment pots to fix my 'grid' in test mode.

anyone help?
 
anybody? on tempest I seem to remember it being fairly obvious which pots were the proper ones to adjust. On this board, I see a b unch of those little blue square pots.
 
do you have the display corrector board? I am pretty sure there are adjustment pots are on that one too. Here is a pic of the board:

http://forums.arcade-museum.com/showthread.php?t=80161

You don't need the board, but with the 6100, you will have hourglass on the screen.


is that the conversion board? Ihave that present. And I do have a small hourglass effect as we speak. It has never bothered me before, and during game play you can't tell. It's just in the pong screen you can see it .
 
ok I bought some replacement pots from bob roberts but I can't get the screen adjusted as nicely as I'd like.

The Xcenter and Xsize pots seem to do nothing when adjusted. Possibly relevant is the fact that my screen was smashed to one side, but when pushing on teh board (flexing it basically) I got the screen to come back, so maybe a bad trace/connection causing this?

anyway here are the pics of the best I can adjust it.

on a side note, where do you measure b+ on a 6100? what should it be? and how do you adjust it (if possible)?


I didn't pull the board out and test the pots to see if they are bad, but it seems very unlikely.
 

Attachments

  • 007.jpg
    007.jpg
    91.6 KB · Views: 19
  • 008.jpg
    008.jpg
    95.5 KB · Views: 16
  • 009.jpg
    009.jpg
    93.4 KB · Views: 18
  • 010.jpg
    010.jpg
    93.3 KB · Views: 17
ok check that, I found the 3 x adjustment pots on the adapter board.


i definitely have an issue with the screen collapsing and folding, pics to follow, when I lightly flex the board (or push on it) right where the board is sitting in teh wood rack shown in the picture I get the picture to come back to full, but it can be very intermittent, back and forth.


sounds like something isn't connecting right, need some help on that one.


oh and in the last pic one left side of the screen (red line) still has a curve to it, how do I adjust that out?
 

Attachments

  • 015.jpg
    015.jpg
    94.2 KB · Views: 17
  • 020.jpg
    020.jpg
    97.1 KB · Views: 15
  • 017.jpg
    017.jpg
    95 KB · Views: 16
do you have three jumper wires? hard to tell in the pic, i assume it was a repair of some sort, beyond the factory added two to the edge connector.
 
do you have three jumper wires? hard to tell in the pic, i assume it was a repair of some sort, beyond the factory added two to the edge connector.

yeah I am pretty sure they are on there.


I got the adjustments almost all figured out aside from the left side looking round(ish) still
 
Back
Top Bottom