RE: Space Invaders Monitor Question

Ok, a bit of lateral thinking here . Is the mirrored glass clean?

-----Original Message-----
From: owner-rasterlist@vectorlist.org
[mailto:owner-rasterlist@vectorlist.org] On Behalf Of Matthew Rossiter
Sent: 03 May 2006 03:09
To: rasterlist@vectorlist.org
Subject: RASTER: Space Invaders Monitor Question

A couple years ago, a friend of mine brought over a Space Invaders to see if
I could get it working before he sold it on ebay.

His Cabinet was in pretty bad shape, but one thing I did notice is his
picture was alot shaper than mine. Meaning, I have to keep the brightness
down kinda low otherwise it loses focus, not by very much, but enough to
slightly bother me. On his, it looked like a brand new monitor. Very
bright and all the edges on the characters were very crisp like legos. Just
how I remembered the game way back when.

So he said I could swap the monitor if I wanted. I swapped the monitor and
had the same problem. He then said I could swap anything I wanted. So I
pretty much swapped everything except the cabinet, the wiring harness and
transformer. Still nothing changed. With everything from my game now in
his cabinet, it still looked great - picture tube and all.

So, this has become sort of an obsession. Swapping the transformer and
wiring harness was a little too much work for me and it doesn't really
answer the question as to how to actually fix the problem in the future.

Keep in mind, this is me being *very* picky. It's not a *real* problem,
more of a curiosity.

So, here is what I've done so far:

1) Verified that the monitor has good ground.

2) Measured the AC voltage going to the monitor, my reading is 115v (I
didn't check with an Oscope though, hmm)

3) Checked to make sure the Video signals going in are good.

4) With reference to the schematics, I have made sure all of the voltages
are correct on the monitor and the CPU board.

5) and of course, the good ol' cap kit.

My game is missing the ground plug, I might try that, but I don't think that
would help.

Still, when I turn up the brightness on Space Invaders to a certain level
they begin to blurr a little.

When I say a "certain level" I'm not talking about an excessive level, The
missile base, for example is still pretty faint when the screen begins to
blurr.

I think this would make a good FAQ if I can find the solution. Again,
everything I'm working on now, was perfect when it was hooked up in the
other cabinet.

Any suggestions?

Matt

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Received on Wed May 3 03:49:05 2006