Tandon TM 502

[Ade]

Hi fellow classiccmpers...

I recently picked up an old Act Sirius 1 machine (I've been looking for one for
years), which has a Tandon TM 502 harddisk in it. Unfortunately, the HDD
doesn't seem to work :(

It spins up, by the sounds of it, but is not talking to the computer. There's
no head noises of any description.

Where would I start in trying to diagnose & fix this drive? I have an elderly
oscilloscope, but little else in the way of diagnostic tools (no logic
analyser, for example). Or am I better off considering it scrap & trying to
find a working replacement? Personally, I'd prefer to resurrect this one if I
can.

Cheers,
Ade.



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