One more screwup with the Ace...

From: Philip Pemberton <philpem_at_dsl.pipex.com>
Date: Tue Dec 10 16:33:00 2002

pete_at_dunnington.u-net.com wrote:
> On things like that, I often don't even try to rescue any suspect ICs
> or even passives, just cut them off close to the PCB with a very fine
> pair of sidecutters, and then desolder the stub of pin.
That's what I've been doing. I've been desoldering using "Soder-Wick" - I
got a small reel of it for 90p.

> First thing is to make sure anything you remove is replaced with a
> good quality socket
I didn't have any decent sockets - I had to cut two Maplin "economy DIL
sockets" down to size, fitted two RAMs, then ran out of sockets. In order to
limit damage to the ICs due to heat, I gave them a quick blast of freeze
spray and then soldered them.

> and if necessary that you can repair any damaged
> tracks with stripped wirewrap wire or similar.
None of the tracks are stuffed, the pads seem to have come up because the
solder wick stuck to them and pulled them up, even though the wick was still
heated.

> How adept are you
> with a soldering iron?
Six years of experience, three with a Maplin elcheapo, three with my Antex
XS25 (25 watt).

> Did you get the 2114s and Z80 I sent you? They should have arrived
> this morning.
Yup, they arrived this morning. Fitted them and the random, static garbage
has been replaced with scrolling garbage. Grr...
I replaced four out of the five 74LS367s too - no dice. The bloody thing is
still being stubborn.

As for your offer to have a look at it, I might just take you up on it. I've
got a schematic for it (drawn by Bodo Wenzel) for a clone of the Ace, some
bits are different, 90% of it is the same though.

Thanks.
--
Phil.
philpem_at_dsl.pipex.com
http://www.philpem.dsl.pipex.com/
Received on Tue Dec 10 2002 - 16:33:00 GMT

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