4 Jan
2002
4 Jan
'02
7:19 p.m.
On Fri, 4 Jan 2002 tothwolf(a)concentric.net wrote:
I've never seen a lithium battery leak from old
age. I have some sitting
around that were made in the mid '80s. I'll make a note to avoid this
particular brand if I can help it. Does the motor still turn? It may just
need to be cleaned up.
It think the battery must have gassed as well. There is evidence of bad
corrosion to zinc plated parts two to three inches from the battery.
Aluminium and copper parts seem to be OK.
The head stepper motor still works but is badly corroded on the outside.
I will have to remove it to clean it properly and then re-align with a known
good floppy.
> Before I get around to cleaning the boards I will
need to figure out how to
> disconnect the display. The connecting cables are hardwired to the main
> board :-(
Are they soldered? Do they use flat plastic or standard
ribbon cable?
Standard twisted pair ribbon cable terminated with a 26 way 0.1in pitch
IDC transition connector which is soldered to the board. I will probably
cut the cable and remove the connector (one pin at a time) and replace
with a standard IDC plug and socket.
I can't understand why they didn't do this in the first place, there is enough
room to fit both a plug and socket. Also, the display power cable has no
connector fitted.
BTW, I worked with a guy who accidentally recharged an AA sized Lithium
battery. It left shrapnel in the wall and he is still slighty deaf in one ear.
Chris
It lef
4 Jan
4 Jan
7:40 p.m.
On Sat, 5 Jan 2002 CLeyson(a)aol.com wrote:
Standard twisted pair ribbon cable terminated with a
26 way 0.1in
pitch IDC transition connector which is soldered to the board. I will
probably cut the cable and remove the connector (one pin at a time)
and replace with a standard IDC plug and socket.
Why not just desolder the connector? Braid works well for some of those
plated through boards, just watch the heat or it can lift the pads.
I can't understand why they didn't do this in
the first place, there
is enough room to fit both a plug and socket. Also, the display power
cable has no connector fitted.
Simple, it would have cost them more. If it saved them $0.20-30 for each
computer made, it would add up quickly. They might have also had
reliability problems with a connector, since a laptop is subject to lots
of shock and vibration. It's possible the original design had such a
connector, and they eliminated it due to cost or reliability issues.
BTW, I worked with a guy who accidentally recharged an
AA sized
Lithium battery. It left shrapnel in the wall and he is still slighty
deaf in one ear.
Do I dare ask *how* one accidentally recharges a lithium battery?
-Toth
8229
days inactive
8229
days old
1 comments
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CLeyson＠aol.com -
tothwolf＠concentric.net