Hallo, here is Pane!

http://www.finetune.co.jp/~lyuka/interests/calc/pioneer/

HP Pioneer series calculator internals
Takayuki HOSODA
Nov. 17. 2009
 Japanese edition is here.

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PCB of the HP pioneer series calculators

Left: HP-17BII, Center: HP-27S, Right: HP-42S(modified)

Membrane switches

 

Key pad and back plate (with LCD)

Partial schematic of the HP 17BII/27S/42S

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SEE ALSO

HP 42S memory upgrade and overclock
Pioneer “Observational Internals”, Paul J. Brogger

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   Copyright (c) HOSODA Takayuki. All rights reserved.
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