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The Amiga Forum · Hardware

#Amiga 2000 Keyboard Fix

11 messages in this thread

#104826From: Frank AbdooJan 23, 1988 12:56 PM

I have rev 1.2 of the 2000 motherboard with the new keyboard, the one with the missing first key after a boot. I have called CBM and every repair shop I know of and no one has the fix yet. I was told by CBM that the information could be found in Tech. Topic #19 which refered to page 14 of the schemetics. The fix is rumored to be removal of 1 or 2 capasitors near the keyboard connector on the motherboard. If anyone knows which capasitors and other details relating to this fix, please let me know. I KNOW, I will void my waranty if I do it myself, but I can't afford to have my machine tied up in the repair shop for two weeks. If this is a simple fix, I can do it just before my waranty expires anyway.

#104840From: Andy LevyJan 23, 1988 3:15 PM

The keyboard fix is to remove C910 and C911 on the A2000 motherboard. –apl

#105021From: RON TROYJan 24, 1988 11:21 AM

Now how do we 1. get the new keyboard, and 2. get the fix applied? Are dealers being notified? Is it safe to just open the box and clip a lead on each? Ron

#105068From: John Sobernheim(TCR)Jan 24, 1988 1:42 PM

Ron, Regarding "Are dealers being notified?", yes. The technician at our store got a notice in the mail from CBM only a few days after the problem arose. -John

#105098From: RON TROYJan 24, 1988 4:42 PM

No one around here seems to have heard it. Ron

#105111From: BILL LEACHJan 24, 1988 5:26 PM

Ron: If you are having the problem with the dropped first character then it sounds as though you have the newer keyboard (do the function keys extend over to about the backspace key?). The notification is supposed to have been sent to all of the dealers (some at the Expo indicated that they had not received any information yet though). Personnally, I would suggest that if you do the mod your self that you remove the caps entirely, that way they won't be able to make inadvertant contact with any other circuits. If I needed to do it, I would first cut one end of each cap (so that it could be resoldered if necessary), fire up the Ami to check to see that the removal works ok (not a guarentee since the capacitance and other things will change a little when the rest of the capacitors are removed but still a good check). Then I would shut down the Ami and finish removing the caps completely. If you are not comfortable with working with printed circuit boards have a repair shop do the modification. In any event you must be very careful not to put any mechanical stress on the circuit board. That is just clip the leads cleanly. If your wire cutters are too big to do that then get another pair. Also, be careful not to allow any small pieces of wire remain in the Ami. Again personnally, I would unsolder the wire stubs but that is definately something for one that has lots of circuit board experiance (and I don't mean building Heathkits either since their circuit boards are much tougher than most). 73, bill

#105143From: RON TROYJan 24, 1988 8:27 PM

That was only 1 part of the question – I've been advised to get the new keyboard, but haven't, nor do I know how I would. If I did, I would want it to work correctly. Ron

#105102From: Frank AbdooJan 24, 1988 5:08 PM

Thank. Frank

#104875From: Steve AhlstromJan 23, 1988 6:56 PM

See msg 100310 — it details the procedure.

#104939From: Don Curtis/SYSOPJan 23, 1988 11:58 PM

Frank, Lift off the power/supply..drive bracket, look at the keyboard connector underneath it and clip out capacitors c910 and c911. You WILL void your warranty doing this yourself. Don

#105104From: Frank AbdooJan 24, 1988 5:11 PM

Thanks Don. Unless the dealers recieve the fix and can do this this modification without keeping my machine a week, I'll wait until the waranty has almost expired and do it myself. Thanks everyone for all the fast replies. Frank.