HP Pioneer series calculator internals
Takayuki HOSODA
Nov. 17. 2009

Japanese Japanese edition is here.
→ Please use the mirror site as well.

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

SEE ALSO
HP 42S memory upgrade and overclock
Pioneer "Observational Internals", Paul J. Brogger

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