TECH: Gun Game Photocells

Archived from groups: rec.games.video.arcade.collecting (More info?)

Hi all,

I've been searching all over for info on the guns for a Mechanized Attack
and have come up empty. This game has Photocells in the guns, not pots.

The guns will not score "hits" on the screen. I have done everything I have
been able to find googling the old group archives. Everything has been
cleaned and the monitor recapped. There is some burn on the monitor, but
it's not too bad.

In diagnostics, the blue and violet dots show up on the screen, but do not
track with the guns.

My multimeter died while I was testing voltages over the weekend so I
haven't confirmed everything I need to look at.

The opto's or photocells on this game only have 2 legs, not like the ones in
the Happ type guns. Does anyone have a part number for a replacement from
Mauser, etc...? I'd like to do some testing.

I still plan to pull all the boards, clean them and re-seat all the ROMS,
but I think the problem is deeper.

I would appreciate any advice or leads on finishing up trouble shooting this
game.

I'd also be open to any conversion suggestions. This isn't a jamma game, but
I love the gun theme and the mirrored effect.

Thanks in advance,

Mark