Apple 400K Drive: Difference between revisions
Rebuild from Guide to the Macintosh Family Hardware ch.9 + the Apple 400K Drive Service Source already hosted here but unused. Connector is DB-19 not DE-19. Sourced the SE-FDHD incompatibility to Apples own statement that the SWIM does not support single-sided drives, and documented the PWM host-generated motor-speed line that is the real reason. Added drive current requirements and the Mac Plus power budget, the DB-19 pinout and Apples six-screw take-apart. Deleted unsourced May 1984 date, U... |
cite Apple's 400K Drive Service Source inline (P4 orphan fix) |
||
| Line 133: | Line 133: | ||
No Apple figures for this drive's release date, retail price, discontinuation date, dimensions, weight, rotation speed range or sector-per-zone layout could be traced to a source consulted here, and none are stated. In particular, the "5 zones of 16 tracks", "8–12 sectors per track" and "394–590 RPM" figures that circulate are not in Apple's own chapter, which says only that '''running the motor at slower speeds lets the computer store more sectors in the tracks nearer the edge of the disk'''.<ref name="gmfh9" /> The closely related [[Apple 3.5 Drive]] mechanism '''is''' specified by Apple, and those figures are on the [[Apple Floppy Disk Drive]] page.<ref name="ss35">''Apple 3.5 Drive Service Source'', Apple Computer, Inc. — hosted on this wiki as [[:File:Apple 3.5 drive.pdf]]. Specifications: disk diameter 3.5 in., 2 recording surfaces, 80 tracks per inch; seek time track-to-track 6 ms maximum, settle time 30 ms maximum, drive startup time 600 ms maximum; head position accuracy ±0.035 mm; formatted capacity 800K and unformatted 1,246K, with the note that disks should be certified double-sided media; the list of directly supported computers and the note that one additional drive can be daisy-chained on the Apple IIGS; operating temperature 40–122 °F (5–50 °C), storage ‒40 to 140 °F with no condensation, relative humidity 5–90%; electrical +12 V standby 10 µA, typical 120 mA, peak 600 mA during eject only for a 2-second maximum, and +5 V standby 10 mA, typical 360 mA; size 2.01 × 4.72 × 7.87 in. (51 × 120 × 200 mm) and weight 2.8 lb (1.3 kg). Troubleshooting symptom charts, including the yellow-versus-red logic-board-to-drive cable checks and the CXD1085A/CXD1085B daisy-chain gate-array revision.</ref> | No Apple figures for this drive's release date, retail price, discontinuation date, dimensions, weight, rotation speed range or sector-per-zone layout could be traced to a source consulted here, and none are stated. In particular, the "5 zones of 16 tracks", "8–12 sectors per track" and "394–590 RPM" figures that circulate are not in Apple's own chapter, which says only that '''running the motor at slower speeds lets the computer store more sectors in the tracks nearer the edge of the disk'''.<ref name="gmfh9" /> The closely related [[Apple 3.5 Drive]] mechanism '''is''' specified by Apple, and those figures are on the [[Apple Floppy Disk Drive]] page.<ref name="ss35">''Apple 3.5 Drive Service Source'', Apple Computer, Inc. — hosted on this wiki as [[:File:Apple 3.5 drive.pdf]]. Specifications: disk diameter 3.5 in., 2 recording surfaces, 80 tracks per inch; seek time track-to-track 6 ms maximum, settle time 30 ms maximum, drive startup time 600 ms maximum; head position accuracy ±0.035 mm; formatted capacity 800K and unformatted 1,246K, with the note that disks should be certified double-sided media; the list of directly supported computers and the note that one additional drive can be daisy-chained on the Apple IIGS; operating temperature 40–122 °F (5–50 °C), storage ‒40 to 140 °F with no condensation, relative humidity 5–90%; electrical +12 V standby 10 µA, typical 120 mA, peak 600 mA during eject only for a 2-second maximum, and +5 V standby 10 mA, typical 360 mA; size 2.01 × 4.72 × 7.87 in. (51 × 120 × 200 mm) and weight 2.8 lb (1.3 kg). Troubleshooting symptom charts, including the yellow-versus-red logic-board-to-drive cable checks and the CXD1085A/CXD1085B daisy-chain gate-array revision.</ref> | ||
== Apple's service documentation for this drive == | |||
Apple's own manual for the M0130 is the '''Apple 400K Drive''' volume of ''Service Source'', hosted here as [[Apple 400K Drive Service Source]]. It is seven pages long and contains a Take Apart chapter and an Exploded View and nothing else: no specifications, no symptom chart, no adjustments, no parts list and no component values.<ref name="ss400k">''Apple 400K Drive'', Apple ''Service Source'', 7 pages, PDF distilled 15 November 1995 - hosted on this wiki as [[Apple 400K Drive Service Source]], file [[:File:Apple 400k drive.pdf]]. Take Apart: six screws from the bottom cover; lift the back of the cover about an inch and pull it out from the front bezel; support the cable connector while lifting the metal drive housing; remove the cable connector, the grounding-tab screw and the screw on the outside of the housing, then slide the drive out. The manual has no Specifications, Troubleshooting or Adjustments chapter.</ref> Where a figure for this mechanism is needed, it has to come from the [[Apple 3.5 Drive Service Source]], which does have a Specifications chapter. | |||
== See Also == | == See Also == | ||
* [[Apple 400K Drive Service Source]] | |||
* [[Apple Floppy Disk Drive]] | * [[Apple Floppy Disk Drive]] | ||
* [[Apple SuperDrive]] | * [[Apple SuperDrive]] | ||