IBM P70/P75 keyboard
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More information is available in material written in Chinese; please translate this material and incorporate the translated text into this wiki page. |
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| Layouts | JIS, ISO, ANSI |
|---|---|
| Keyswitches | Alps plate spring |
| Keycaps |
Dye sublimated PBT except for ABS spacebar |
| Interface | Proprietary |
The P70/P75 keyboard was part of the IBM P70 (386) and P75 (486) portable computers, both also known as the IBM Model 8573. The keyboard would connect to the computer via the tiltable top part which also serves as a large keyboard "stand". To save weight of the unit as a whole, the P70/P75 keyboard was constructed accordingly.
The Alps SKCP series switches are PCB mounted in a snap-in case that is made of thin plastic compared to other IBM keyboards of that time, presumably also to save weight and space. The keyboard speaks the PS/2 protocol but uses a proprietary connector.[1][2] The keycaps are made of dye sublimated PBT.
Contents
Variants
With the exception of JIS, all of the following regional variants exist according to official IBM documentation. The same documentation lists the replacement cable as FRU 64F9998.[3][4]
| Part | EC | FRU | Layout | Confirmed dates |
|---|---|---|---|---|
| 65F0000 | Canadian French | |||
| 65F0045 | C27700 | 65F0063 | JIS | 90/07 |
| 23F3229 | C13310 | 65X1537 | US English | 89/07 |
| 65X1598 | Belgian | |||
| 23F3212 | C27695 | 65X1601 | Danish | 90/02 |
| 65X1602 | Dutch | |||
| 65X1603 | French | |||
| 23F3216 | C27215 | 65X1604 | German | 90/01 |
| 65X1605 | Italian | |||
| 65X1606 | Latin Spanish | |||
| 65X1607 | Norwegian | |||
| 65X1608 | Portuguese | |||
| 65X1609 | Spanish | |||
| 65X1610 | Swedish | |||
| 65X1611 | Swiss/French/German | |||
| 65X1612 | UK English | |||
| 65X1613 | Turkish | |||
| 65X1614 | Greek | |||
| 65X1615 | Hebrew | |||
| 65X1616 | Arabic |
Disassembly instructions
When attempting to open the P70/P75 keyboard one should follow the instructions on this link.
Proceed with caution to avoid breaking the case since it can be quite strenuous to open the plastic latches, particularly the ones under the function row that latch to a metal bar running all across the keyboard and are not easily accessible.
Gallery
The computer itself
The whole computer (Swedish layout)
Opened for repairs
Danish ISO version (P/N 23F3212)
Top
Top, with feet lowered
Side
Back
Bottom
Switches
Opened
Various details
Switch disassembled
German ISO version (P/N 23F3216)
Top
Assembly top case removed
PCB
Serial# and IBM badge
Case detail
Lower case, shielding
Top part snap-in case
References
- ↑ Sandy55 — Details about the connector used by the host computer Retrieved 2024-03-17.
- ↑ Imgur — Pictures of the male part of the custom connector Dated 2015-02-20. Retrieved 2024-03-17.
- ↑ IBM — Portable 8573 - P75 - Parts Listing, Document ID: PMYS-3X2TNA (ps-2.kev009.com) Dated 1996-10-09. Retrieved 2024-03-17.
- ↑ IBM — Hardware Maintenance Manual - Volume 1: Laptop, Notebook, Portable and ThinkPad Computers - May 1995 (document S82G-1501-01), p. 176 (PDF page 188), "Keyboard and Mouse (P70 386)". (Ardent Tool of Capitalism) Retrieved 2024-03-17.
External links
- KBtalKing — ■鍵盤史的遺跡IBM-Model 8573-P70(ALPS葉式彈簧)■ — forum thread mentioning the 23F3212 (Japanese, Wayback Machine). Posted 2011-06-06. Archived 2014-03-01.
