Teac FD-55B Floppy Oddity

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(a)classiccmp.org => [mailto:owner-classiccmp@classiccmp.org]On Behalf Of John Chris Wren => Sent: Tuesday, February 26, 2002 7:50 PM => To: classiccmp(a)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 => =>