New subject: DisplayWrite, or DisplayWriter

10 Dec 2002

On Dec 10, 22:36, Philip Pemberton wrote:
...
  pete(a)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. 
You'd be much better off using a nice BIG solder sucker.  Wick is really
good for removing excess solder, say from a "generously" reworked SMT
device, but not ideal for common-or-garden ICs.

...
  In order to
 limit damage to the ICs due to heat, I gave them a quick blast of freeze
 spray and then soldered them. 
I hate to say it, but that's not a good idea.  IC's don't mind heat if
it's
evenly applied (think infra-red reflow oven) but thermal shock can break
seals etc.

...
   How adept are
you
 with a soldering iron?  Six years of experience, three with a Maplin elcheapo,
three with my Antex
...
  XS25 (25 watt). 
Well, at least it's not one of those nasty Antex 15W irons, but I prefer a
50W temperature-controlled iron.  The risk with a small iron is that the
tip cools down as you put it on the work, and the lower-wattage irons can't
heat it up very quickly again.  Result is that the joint isn't really hot
enough.

...
   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...

Well, it's *some* improvement :-)

...
  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.

OK.  I'll mail you my address and phone number off-list, and maybe we can
get together.

-- 
Pete						Peter Turnbull
						Network Manager
						University of York

One more screwup with the Ace...