hp41c key 1 not very clicky
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05-24-2014, 10:02 AM
Post: #1
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hp41c key 1 not very clicky
Hi,
I have taken apart my 41c (1943A) because the key "1" doesn't click properly and I have discovered that without the cpu board it clicks properly again so it has to do with a deformation of the structure/keyboard pcb that happens when the cpu board is put in place. Is this a common problem? How can I fix that? Any ideas please? This is my first time here @hpmuseum, so I'll take this opportunity to say hello to everyone! Hello! |
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05-24-2014, 11:30 AM
Post: #2
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RE: hp41c key 1 not very clicky
Hello George - let's hope your screw posts withstand the experience... they\re known to be the weakest link in the chain for the 41 assy.
Good luck! |
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05-24-2014, 12:47 PM
Post: #3
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RE: hp41c key 1 not very clicky | |||
05-26-2014, 04:51 PM
Post: #4
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RE: hp41c key 1 not very clicky
The keys 1 and 2 working but not clicking: it seems to be a common problem... but how to fix that?
Anyone? Please? |
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05-27-2014, 12:34 AM
Post: #5
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RE: hp41c key 1 not very clicky | |||
05-27-2014, 05:58 AM
(This post was last modified: 05-27-2014 05:58 AM by Ángel Martin.)
Post: #6
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RE: hp41c key 1 not very clicky
Afraid it's related to the internal key design - of which I don't know enough but have heard repeated times the domes can collapse and when that happens it's the end of the key - at least of the clicking part.
I 'sppose a really handy person could exchange a single key but the keyboard assy. may share a common domes layer, in which case we're back to square one? Probably the best approach would be to cannibalize one from a defunct unit on eBay... Just saying, not sure if that's accurate. Better ask some of the hardware gurus, like Tony Duell or Geoff Q. |
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05-27-2014, 06:57 AM
Post: #7
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RE: hp41c key 1 not very clicky
I have disassembled and reassembled at least four 41c keyboards, and replaced keys that are not clicky anymore. It's not an easy job, but it is possible.
You will need a donor calculator to supply a replacement metal clicky disc. I use a hot glue gun to reassemble the keyboard. Let me know if you want guidance. Cheers, John |
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05-28-2014, 07:30 AM
Post: #8
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RE: hp41c key 1 not very clicky
(05-27-2014 06:57 AM)Johnboy Wrote: I have disassembled and reassembled at least four 41c keyboards, and replaced keys that are not clicky anymore. It's not an easy job, but it is possible. Yes indeed, I need guidance. The part where one cuts the plastic rivets, plus the hot glue to hold it back together part of it really really makes me feel nervous. Is that a good fix? Or will I botch my 41c forever...? Cheers |
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05-29-2014, 09:18 AM
Post: #9
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RE: hp41c key 1 not very clicky | |||
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