14 Feb
2006
14 Feb
'06
6:46 p.m.
On Tuesday 14 February 2006 01:30 am, Tony Duell wrote:
That number doesn't ring any bells offhand. A quick search on the number
doesn't turn anything up.
And if anybody
is working on any Osborne, Kaypro, or C64 stuff feel free
to give a holler as I did quite a bit of that and have tech info
available if I
I don;'t suppose you know anything about the Sony CX065B chip, do you? It's a motor speed controller, and I'm doing
battle with it (and other
components) in the spindle motor of an Epson SD320 drive, used in a TF20.
I have the service information on the SD321 drive (same unit without a
head load solenoid) in the QX10 techical mnaul, but it doesn't really
explain this chip at all.
The reason I ask here is that I've discovered the same chip was used in
the Alps drive mechanism used in the Commodore 1504 and 1541. I have the
offical CBM serivce manual which contains a scheamtic and little else, I
also have the Sams book on repairing said units which contains rather
more information. I wondered if you had anything else?
Not offhand. The only time I ever really encountered any serious speed
problems with those motors was when the tach winding opened up, and they'd
run at full-speed with no regulation. I do have the manuals for the 1541 in
the other room, and can take a look...
I have had speed control chips fail on a small number of occasions, but don't
recall whether this was one of the numbers or not. Usually if you're
getting a good waveform off the tach winding and power to the chip, and no
control coming out, that's the problem -- it's been either the motor or the
chip in those cases, not much else in there.
What sort of a problem are you having?
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
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Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin