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Funky IBM keyboard...

post #1 of 5
Thread Starter 
A few months ago, I found an old '93 IBM Model M2 keyboard using the French Canadian layout. Since mechanical keyboards that either match the quality of IBM ones or simply use this layout are pretty much inexistent, finding one, for free, that had both of these "features" was a true blessing! Of course though, it had the infamous faulty capacitors. I replaced these following the guide on Geekhack but I still had issues. Because of that, I gave up on the keyboard until tomorrow. I troubleshooted it and determined that the issues I was facing were caused by the keyboard's membrane (if you are not familiar with buckling springs keyboards, the keys bend a spring which collapses and then hits a membrane.). After cleaning the membrane's contacts, the keyboard started working "properly".

Now, I'm facing two issues, a minor one and an important one:

Minor one: The enter key doesn't really provide any tactile feedback (Maybe a bit more than a regular membrane keyboard but not like the other mechanical keys.). Also, it won't register a keystroke unless I hit pretty much exactly where the spring is located and I also need to completely bottom it out. I believe both issues are caused by the metal pin that's supposed to make it balanced.

Major one: The left Ctrl key and the right Alt key are apparently too sensible. If I simply put the keycap on the spring without even pressing it, these keys will be permanently actuated until I remove the keycap. Even resting the Alt key on the spring without properly installing and then simply moving it a little bit with actuate it. The left Ctrl key can work normally but only if I install it in the "improper" way (It will then feel mushy and a bit like a regular membrane keyboard and provide absolutely no tactile feedback.). If I install it properly, it is permanently actuated...

Any ideas on how to fix these two isses?

Thank you very much! smile.gif

Edit: I managed to make the Alt key work "properly" by installing it in the key the improper, mushy way and now it works properly like the Ctrl key but I lost all tactile feedback on these two keys... I'd still like a "better" solution... Thank you smile.gif
Edited by Snowmen - 12/8/12 at 3:22pm
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post #2 of 5
Are any of the other keys exhibiting issues with feedback? Possibly commonly used keys? Might be possible that the spring has just worn out. Just a shot in the dark; maybe I'm way off.
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post #3 of 5
Thread Starter 
Some of them do have problems with the feedback but only if they're not inserted properly. If you remove it and then put it back, it's usually fixed. I tried to put the Enter key back at least 20 times but that didn't work. Maybe there's a special technique since it uses a different stabilizer. Also, the keys do not start to lose their feedback with time.

+rep thank you for trying smile.gif
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Corsair Hydro Series H60 Windows 8.1 Professional x64 BenQ G2420HD 24" 1920x1080 IBM Model M2 French Canadian Layout '93 
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post #4 of 5
Are you SURE that the shell is tightly put back together?

You get these same symptoms when people get a Model M with broken rivets or don't do a nut/bolt mod correctly.
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post #5 of 5
Thread Starter 
Quote:
Originally Posted by ripster View Post

Are you SURE that the shell is tightly put back together?
You get these same symptoms when people get a Model M with broken rivets or don't do a nut/bolt mod correctly.

All the little retaining clips are properly clipped and the two screws on the back are screwed in as tight as they can be screwed.

+rep thanks smile.gif
My Gaming Rig
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Seagate Barracuda 7200.12 1TB Seagate Barracuda 7200.12 500GB Toshiba HDKPC08 3TB Samsung 840 Evo 120GB 
CoolingOSMonitorKeyboard
Corsair Hydro Series H60 Windows 8.1 Professional x64 BenQ G2420HD 24" 1920x1080 IBM Model M2 French Canadian Layout '93 
PowerCaseMouseMouse Pad
Mushkin Enhanced Joule 1000W Modular Antec DF-35 (Modded) Razer Deathadder 3500 DPI Mionix Sargas 900 
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My Gaming Rig
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 2500K @ 4,5GHz - 1.296 volts MSI P67A-GD55 Asus Strix Geforce GTX 970 4GB Mushkin Enhanced Silverline Stiletto 2x4GB 1333... 
Hard DriveHard DriveHard DriveHard Drive
Seagate Barracuda 7200.12 1TB Seagate Barracuda 7200.12 500GB Toshiba HDKPC08 3TB Samsung 840 Evo 120GB 
CoolingOSMonitorKeyboard
Corsair Hydro Series H60 Windows 8.1 Professional x64 BenQ G2420HD 24" 1920x1080 IBM Model M2 French Canadian Layout '93 
PowerCaseMouseMouse Pad
Mushkin Enhanced Joule 1000W Modular Antec DF-35 (Modded) Razer Deathadder 3500 DPI Mionix Sargas 900 
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