Hewlett-Packard 9121 FDD

Resources

HP Museum (plus documentation)

Please also see a page about Hewlett-Packard 85B which works with this floppy.
Service manual contains a great instruction how to perform various low level tests of the FDD which can self diagnose most of the problems with the unit.
Mass storage ROM manual contains instructions how to operate the FDD from the HP 85B interpreter.

Internals

Motherboard

Floppy Disk Drive

Sony OA-D31V-14

Reassembly and Some Dirt

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