Re: Re: Star Wars Self-Test

A solder sucker does the trick or if You're a beginner use a dremel to cut
the chip out and then remove the pins one by one. Make sure the iron is hot
and don't keep it on the pin for long. Add a little solder first if using as
solder sucker. maplin sell a temperature controlled iron for 12 quid. piggy
can work but most times not.
----- Original Message -----
From: "Kenneth Sumrall" <ksumrall@pacbell.net>
To: <vectorlist@vectorlist.org>
Sent: Friday, September 08, 2006 7:26 PM
Subject: Re: VECTOR: Re: VECTOR: Star Wars Self-Test

> With all the time you've wasted piggybacking chips, and agonizing over the
> self
> test, it would have been _MUCH_ faster to just get the $10.49 Radio Shack
> desoldering iron, part # 64-2060, and you'd have an answer already. Yeah
> it's a radio shack tool, but this one is actually pretty good. :-) Just
> let it heat up a good 10 to 15 minutes before you use it. Squeeze the
> bulb, press the hollow tip over the pin and onto the pad, when you see
> the solder melt, wait 1 or 2 more seconds for the heat to go all the way
> through the board, then stop squeezing the bulb and pull the iron away.
> Squeeze the bulb hard over a trash can to eject the solder you just
> sucked,
> and repeat the process.
>
> Or get a good pair of diagonal cutters. The cheap bulky cutters suck at
> cutting out chips, but a good pair will have the chip cut out in about
> 1 minute, and then you can use a small needle nose pliers and a standard
> soldering iron to pull each pin 1 at a time, then either desoldering braid
> or a solder pullit (believe it or not, Radio Shack also has an excellent
> spring loaded desoldering tool, # 64-2098 for only $7.99).
>
> If they don't have Radio Shack in Britain, I'm sure you can find similar
> tools
> at any decent electronics shop.
>
> ___
> Ken
>
>
> Paul Maddern wrote:
>> Okay... With a new 74LS244 piggybacked in 1K a lifted leg looks
>> completely
>> different on the scope compared to the original chip... I don't get how
>> comes the self test still reports that everything is okay? Am I
>> overlooking
>> something here? If I had a desoldering station I'd have replaced it by
>> now,
>> but the messiness of clipping it out and the self test are stalling me!!!
>>
>> Paul
>>
>> -- ArcadeGeek.co.uk --
>>
>>
>> -----Original Message-----
>> From: owner-vectorlist@vectorlist.org
>> [mailto:owner-vectorlist@vectorlist.org] On Behalf Of peter jones
>> Sent: 07 September 2006 23:15
>> To: vectorlist@vectorlist.org
>> Subject: VECTOR: Re: VECTOR: Star Wars Self-Test
>>
>>
>> -----Original Message-----
>> From: "Paul Maddern" <paul@arcadegeek.co.uk>
>> To: <vectorlist@vectorlist.org>
>> Date: Thu, 7 Sep 2006 20:01:10 +0100
>> Subject: VECTOR: Star Wars Self-Test
>>
>>
>>>Hey All
>>>
>>>Just a quick question; my Star Wars PCB self-test reports all ROM and
>>>RAM
>>>okay, but how accurate is this?
>>
>>
>> it can test the program roms by reading them and generating a checksum,
>> it can test system ram by writing patterns to it and then reading back.
>> the sound board has it's own selftest.
>>
>> one thing it cant test is the proms, and they fail a lot.
>>
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>>
>>
>>
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Received on Fri Sep 8 14:50:06 2006