Tempest Problems...

Greetings,

I've been having a problem getting my Tempest machine working properly. I
have installed a new picture tube (from Richardson), a LV2000, and a "get well
kit" on the monitor. It looked pretty good after I first fired it up...just
needed to re-converge and set the purity on it. So I went to make the
adjustments and blew some stuff up. I missed the ground wire to the HV cage
(that should have been screwed to the chasis) and it apparently brushed up
against something. I know because it took C901 & 902... I replaced them and
have gone over the HV cage, and the deflection board checking all the
transistors (the chasis mount ones too) and diodes. So, I think the monitor
is not my problem now...although I haven't COMPLETELY ruled it out. Oh yeah,
I also noticed that R106 had opened up on the deflection board so I replaced
it as well.

What I'm seeing is that all the text is now slanted and the bottom and top of
the screen is somewhat bowed. I've got screenshots of all the test screens,
as well as the playfield, and some scope readings I took on the game board
outputs (on the test screen with the plain white border). The screenshots are
at:

http://www.smart.net/~downin/tempest/

I retouched all the solder joints on both the interboard connectors and on all
the caps in the AVG section. Unfortunantly I don't own a spare monitor or
boardset for the machine, so I can't swap anything out. Any ideas or
suggestions would be greatly appreciated!

-- 
Dave Downin (dave@arlo.net)
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