Hyperdrive 20

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Article #36139

#36139

From: Teriann Wakeman
Date: Tue, 03 Jan 1989 20:15

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The internal hard disc on my 512K died recently(Hyperdrive 20). I opened
up the Mac's case, & looked at things with my trusty DMM. The Hyperdrive's
power supply board is dead 120VAC was going in OK but nothing was coming out.
So, according to theory, the hard disc itself is OK. There are 2 voltage
levels that are suposed to be provided by this supply.

1) Anyone know what voltages (AC or DC ) the power supply is supposed to
produce (one is probably 5VDC for the logic & the other probably runs
the drive's motor & the Fan)

2) anyone know about availability / price of a replacement board. I'm
not sure I'm up to troubleshooting this with a DMM & no schematic ( looks
like a pulse power supply).

Any help appriciated.

TeriAnn
twakeman@hpcea.ce.hp.com
(415)857-5057

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From: twakeman@hpcea.CE.HP.COM (Teriann Wakeman)
Newsgroups: comp.sys.mac
Subject: Hyperdrive 20
Message-ID: <430071@hpcea.CE.HP.COM>
Date: 3 Jan 89 20:15:47 GMT
Organization: HP Corporate Engineering - Palo Alto, CA
Lines: 20