Re: Help with Fried IIE Keyboard!

[misc176@csc.canterbury.ac.nz (Philip Lamb, UoC-Chch-NZ)]

In article <2p39iq$3ai@lastactionhero.rs.itd.umich.edu>, teke@livy.ccs.itd.umich.edu (Jeff W. Schroeder) writes:
> Hi all!
> 
> Got myself a real nice problem this time...   I was cleaning my
> monitor last night and apparently picked up a wonderful static charge.
> Touched the keyboard on my enhanced IIe and <<<ZAP>>>.
> Needless to say only half the keys work now when you press them.  I
> am not sure if I blew the Keyboard ROM or if I zapped the Keyboard
> encoder chip.    Does anyone have any suggestions as to where I
> could find these parts or if I am barking up the wrong tree???  I really
> can't afford a motherboard replacement, so I would like to replace the
> toasted chips myself.  Please post any suggestions as to were I can
> get these items.  I suspect that the problem lies in the keyboard
> encoder...  Somewhere, once I read that it is the only component in
> the IIe that is highly succeptable to static discharges.
> Thanx,
> Teke
-- 
As someone who ha sbuilt a IIe from parts, I think I can help a bit. The
keyboard encoder, or the keyboard ROM are most likely your problems. They're
both on the main board. The encoder is an AY-3600-PRO or a KB3600-PRO. The pro
stands for PROM. AY-3600 chips without the PRO have their own ROM, and do not
require the extra ROM like the IIe does. THESE CHIPS ARE VERY HARD TO GET HOLD
OF. In fact if anyone knows where I could get one I'd be glad to know, as
currently I'm using a homebuilt keyboard encoder with my IIe. The other chip is
an Apple specific part, the KB ROM. I couldn't get hold of one of these in NZ,
so was forced to use an EPROM instead, which I had burned from a friends. the
EPROM is 2 pins longer, but these can be hotwired direct to the motherboard.
Hope this helps you some.

| From Philip Lamb,                |"So I open the door to my enemies,      | 
| Canterbury University,           |and I ask could we wipe the slate clean,|
| Christchurch, New Zealand.       |but they tell me to go f**k myself,     |
| P.LAMB@CSC.CANTERBURY.AC.NZ      |you know you just can't win"            |
| MISC176@CSC.CANTERBURY.AC.NZ     |Pink Floyd: TDB-'Lost for Words'        |