Keyboard models - Revision history

FrankRahman at 20:55, 4 October 2025

2025-10-04T20:55:07Z

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	Note about Serial Numbers near #4000 - #5000: I have found that a white thread locker was applied. If you have one of these machines only use an Anex 3980 +1 X 75 Phillips Screwdriver. If any screw appears to "Cam Out" stop immediately and hammer the Anex into the screw head before trying to remove the screw further. Other wise you will likely need to use a 1/8 inch Left Hand drill bit to remove the screw head. Carefully remove top of case. From the inside of the case us a ENGINEER PZ-58 Screw Removal Pliers to back the screw out as far as it will go then use the PZ-58 from the outside to remove the screw.		Note about Serial Numbers near #4000 - #5000: I have found that a white thread locker was applied. If you have one of these machines only use an Anex 3980 +1 X 75 Phillips Screwdriver. If any screw appears to "Cam Out" stop immediately and hammer the Anex into the screw head before trying to remove the screw further. Other wise you will likely need to use a 1/8 inch Left Hand drill bit to remove the screw head. Carefully remove top of case. From the inside of the case us a ENGINEER PZ-58 Screw Removal Pliers to back the screw out as far as it will go then use the PZ-58 from the outside to remove the screw.

			For information about the international keyboards click [[International kits\|here]].

	== Non destructive exam of Keyboard ==		== Non destructive exam of Keyboard ==

2025-09-16T18:16:40Z

Maxiswitch Schematic

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	====Maxiswitch ~~Schematic~~====		====Maxiswitch Schematics====

	[[Media:Maxi-switch Schematic.pdf\|Schematic]]		[[Media:Maxi-switch Schematic.pdf\|Schematic]]

2025-09-16T18:16:04Z

Maxiswitch Schematic

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	====Maxiswitch Schematic====		====Maxiswitch Schematic====

	~~The schematic -~~ [[~~File~~:~~Maxiswitch drawing~~.pdf]]		[[Media:Maxi-switch Schematic.pdf\|Schematic]]

	Design Dates:<br>		[[Media:Maxi-switch Keyboard Spec.pdf\|Keyboard Specification]]
	The "Plate" blue print is dated August 5, 1982.<br>
	The ~~“schematic”~~ is dated October 8, 1982.<br>		[[Media:Maxi-switch PC BD Drill DWG.pdf\|Circuit Board]]
	The ~~“PC BD Drill Dwg”~~ is dated November 11, 1982.<br>
	The “Keyboard ~~Specification-Layout” isn’t until~~ April 4, 1983.		[[Media:Maxi-switch Panel.pdf\|Support Panel]]

			Design Dates:(In order of date)<br>
			* The "Support Plate" blue print is dated August 5, 1982.<br>
			* The “Schematic” is dated October 8, 1982.<br>
			* The “Circuit Board” is dated November 11, 1982.<br>
			* The “Keyboard Specification” is dated April 4, 1983.

	==Type A vs Type B Keyboard ==		==Type A vs Type B Keyboard ==

2025-08-29T15:52:42Z

Keyboard Close Out

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	[[File:Keyboard Close Out.png]]		[[File:Keyboard Close Out.png]]
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	In the June 1988 edition of Profiles this ad ran on page 41. There must have been a surplus of the keyboards in inventory and Kaypro ~~was ready to move~~ on to the DOS based systems.		In the June 1988 edition of Profiles this ad ran on page 41. There must have been a surplus of the keyboards in inventory and Kaypro had already moved on to the DOS based systems at this point.

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2025-08-29T15:51:25Z

Maxiswitch Schematic

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	Design Dates:<br>		Design Dates:<br>
	The "Plate" blue print is dated 8/5~~/82~~.<br>		The "Plate" blue print is dated August 5, 1982.<br>
	The “schematic” is dated ~~10/~~8~~/82~~.<br>		The “schematic” is dated October 8, 1982.<br>
	The “PC BD Drill Dwg” is dated 11~~/11/82~~.<br>		The “PC BD Drill Dwg” is dated November 11, 1982.<br>
	The “Keyboard Specification-Layout” isn’t until 4~~/4/83~~.		The “Keyboard Specification-Layout” isn’t until April 4, 1983.

	==Type A vs Type B Keyboard ==		==Type A vs Type B Keyboard ==

2025-08-29T15:47:58Z

Maxiswitch Schematics

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	====Maxiswitch ~~Schematics~~====		====Maxiswitch Schematic====

	The schematic - [[File:Maxiswitch drawing.pdf]]		The schematic - [[File:Maxiswitch drawing.pdf]]

			Design Dates:<br>
	The "Plate" blue print is dated 8/5/82.<br>		The "Plate" blue print is dated 8/5/82.<br>
	The “schematic” is dated 10/8/82.<br>		The “schematic” is dated 10/8/82.<br>

2025-08-29T15:46:45Z

Maxiswitch Schematics

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	====Maxiswitch Schematics====		====Maxiswitch Schematics====
	[[File:Maxiswitch drawing.pdf]]
			The schematic - [[File:Maxiswitch drawing.pdf]]

			The "Plate" blue print is dated 8/5/82.<br>
			The “schematic” is dated 10/8/82.<br>
			The “PC BD Drill Dwg” is dated 11/11/82.<br>
			The “Keyboard Specification-Layout” isn’t until 4/4/83.

	==Type A vs Type B Keyboard ==		==Type A vs Type B Keyboard ==

2025-08-29T15:40:44Z

Keyboard Mechanisms

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	== Keyboard Mechanisms ==		== Keyboard Mechanisms ==

			=== An note about swapping keycaps ===

			The keycaps are not transferable between manufacturers except the MaxiSwitch Keycaps can be used on an SMK keyboard as best as I can tell, but not the other way around since they are too tight.

	=== SMK ===		=== SMK ===
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	=== Keytronic ===		=== Keytronic ===

			The Keytronic keyboard is the only one that has the LED holes and circuitry. (This only applies to possibly using it to replace other keyboards.)

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2025-08-01T18:40:36Z

Type A vs Type B Keyboard

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	On early machines (around #8,000) There exists two types of Keyboards. In an early article they are defined as Type A and B. It turns out that this is a key indicator of who manufactured the keyboard and if it is a tactile switch or foam and foil keyboard. SMK appears to have only made the type A keyboards with tactile switches in the early days. Keytronics made the Type B keyboards with a foam and foil keyboard that degrades over time.<br>		On early machines (around #8,000) There exists two types of Keyboards. In an early article they are defined as Type A and B. It turns out that this is a key indicator of who manufactured the keyboard and if it is a tactile switch or foam and foil keyboard. SMK appears to have only made the type A keyboards with tactile switches in the early days. Keytronics made the Type B keyboards with a foam and foil keyboard that degrades over time.<br>
	<br>		<br>
	[[File:Keyboards - Radio Electronics, Nov. 1983, page 21.png]]From the November 1983 Issue of Radio Electronics		[[File:Keyboards - Radio Electronics, Nov. 1983, page 21.png\| 300px]]From the November 1983 Issue of Radio Electronics

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2025-08-01T18:38:17Z

Maxi Switch