Galaga chip needed!!! Help 5103? (Color rom?)
V8Stud
Two broken pins on a 5103 chip off the CPU board. Any help appreciated.
John Robertson
To: All
Parts? Needed?
V> From: v8s...@aol.com (V8Stud)
V> Date: 24 May 1996 23:25:59 -0400
V> Two broken pins on a 5103 chip off the CPU board. Any help appreciated.
IF you can find any of the 51XX family of chips they will work, you don't
need to have the same last two numbers (XX). I probably have a few around.
If the pins are still sticking out of the body of the chip and just the
bottom part of the pins is missing you can solder on a peice of a leg
from a dead IC to the remnants of the old pin. Touchy work, but well worth
it!
:-#)>
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Al McCormick
In article <576.31...@flippers.com> j...@flippers.com (John Robertson) writes:
>From: j...@flippers.com (John Robertson)
>Subject: Re: Galaga chip needed!!! Help 5103? (Color rom?)
>Date: Sat, 25 May 96 00:58:16 PDT
>To: All
>Parts? Needed?
> V> From: v8s...@aol.com (V8Stud)
> V> Date: 24 May 1996 23:25:59 -0400
> V> Two broken pins on a 5103 chip off the CPU board. Any help appreciated.
>IF you can find any of the 51XX family of chips they will work, you don't
>need to have the same last two numbers (XX). I probably have a few around.
>If the pins are still sticking out of the body of the chip and just the
>bottom part of the pins is missing you can solder on a peice of a leg
>from a dead IC to the remnants of the old pin. Touchy work, but well worth
>it!
No offense but this fix is temporary at best. If one pin decides to defect,
the others are usually not far behind (the domino theory as applied to
custom ICs as it were...) Just ask Doug Jeffries about his Space Zap saga...
What I do for EPROMs and customs is get a good quality socket (non-gold
machine pin but that's just what I had at work) and solder the chip in the
socket. Then use a piece of wire or a donor pin to restore the amputee
victim. If you're paranoid about one of the socket's pins breaking, put
another socket between the PCB socket and the IC carrier socket. For
troubleshooting Galagas, I plan to do an entire chipset like this.
The only problem with this method is the board starts to look like midtown
NYC with all those stacked sockets.
<standard disclaimer about if you toast your chips, that's your problem...>
Virtu-Al
D.Hughes
In article <4o5uk7$1...@newsbf02.news.aol.com> v8s...@aol.com (V8Stud) writes:
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>From: v8s...@aol.com (V8Stud)
>Newsgroups: rec.games.video.arcade.collecting
>Subject: Galaga chip needed!!! Help 5103? (Color rom?)
>Date: 24 May 1996 23:25:59 -0400
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>Reply-To: v8s...@aol.com (V8Stud)
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>Two broken pins on a 5103 chip off the CPU board. Any help appreciated.
If your REALLY carful, you may be able to solder a tiny jumper. That is, if
you still have some lead sticking out of the chip! I've done this many times,
using a 1/4" long inch piece of bare wire wrap wire, and hemostats to hold and
act as a heat sink (so you don't fry the chip).
I've even soldered legs back together, but that's pretty tough if it's still
on the board.
This is an especially useful technique for chips with a bajillion legs on
multilayer boards.
dewayne
Patrick Peters
v8s...@aol.com (V8Stud) wrote:
>Two broken pins on a 5103 chip off the CPU board. Any help appreciated.
You can find that same input chip on Dig Dug, Pole Position I/II,
Galaga, Gaplus, and (I think) Mappy. It's a custom Namco IC that you
won't find a substitute for.
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