Teac FD-55B Floppy Oddity

From: Russ Blakeman <rhb57_at_vol.com>
Date: Wed Feb 27 00:37:32 2002

If you need another I'm sure I can dig one out of storage for shipping, drop
me a direct email. If memory serves me I probably have half a dozen.

=> -----Original Message-----
=> From: owner-classiccmp_at_classiccmp.org
=> [mailto:owner-classiccmp_at_classiccmp.org]On Behalf Of John Chris Wren
=> Sent: Tuesday, February 26, 2002 7:50 PM
=> To: classiccmp_at_classiccmp.org
=> Subject: Teac FD-55B Floppy Oddity
=>
=>
=>
=> My Otronas have FD-55B-01-U drives in them. I thought the
=> drives were
=> fried, since they wouldn't work on the Otrona nor on the PC, but
=> in dinking
=> around, I determined that on at least one drive (and probably the other),
=> the head load solenoid is not pulling in. I see power being
=> applied, but it
=> only looks like +5V.
=>
=> I don't have schematics, and I'm not ready to risk wrecking
=> the drives
=> determining the following question: Should the solenoids pull
=> in on +5 or
=> +12? If I'm seeing +5, I suspect the solenoid driver transistor could be
=> cooked. The solenoid coil is intact, as I'm seeing 44 ohms
=> across it, out
=> of circuit. In either case, I don't feel even the lightest
=> twitch when it's
=> supposed to pull in (and the jumper is in place, for load on
=> motor select).
=>
=> Does anyone have any FD-55B (these are the 360K DS-DD 48
=> TPI) drives they'd
=> like to part with, either to see an Otrona running, or in exchange for ye
=> olde green stuffe?
=>
=> --John
=>
=>
Received on Wed Feb 27 2002 - 00:37:32 GMT