Re: Asteroids Blues

-----Original Message-----
From: "Robert Gonyer" <arcade-dawg@mchsi.com>
To: <vectorlist@vectorlist.org>
Date: Fri, 25 May 2007 12:09:04 -0500
Subject: VECTOR: Asteroids Blues

>
> Good thing it's a long weekend so I can forget about my troubles, lol.
>
>
>
> Board #1 is the one that was buzzing really loudly. I am 100% sure it's the
> board, because another board (that used to work 99%) didn't buzz at all in
> this cabinet. I replaced all the caps on the board, plugged her in in
> anticipation that I was gonna get a game in.. and BUZZZZZZZZZ.. I couldn't
> believe it. Any other ideas?
>
>
>
> Board #2 is the one that you all helped me find a bad chip using freeze
> spray. It turned out to be the one directly above the CPU. (74LS245N)
> Sound like the right part? I know it didn't match the #'s on the original,
> but I figured Bob knew what he was sending me, and it was the right pinout.
> Symptoms before was that the game would play fine for a couple hours, then
> it was start flaking out as it got warm. Freeze spray to this chip brought
> it back to life. I replaced this chip, now it flakes out constantly, won't
> even come up. Clicking from the coin door, random noises, etc. I have
> replaced lots of chips before, so I don't THINK I did it wrong, but it is
> certainly possible. Any other ideas?
>
did you damage any tracks when you pulled the 245?
did you use a good socket?

and check the 2 main problems i find - re-seat the cpu and check the soldering on the crystal.

i have about 7 asteroids & similar style (millipede etc) pcb's - none of them had an intact crystal when i got them.
they stick up with a great big invisible neon sign on them "break me!"
LOL

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Received on Fri May 25 15:50:53 2007