Floppy Drive Repair: Difference between revisions
P4 verification: link IBM's 3.5-inch diskette drive technical reference, hosted here but previously unlinked from any article |
P4 verification: cite the hosted Apple DuoDisk/UniDisk procedures, the HDI-20 volume and the Dead Mac Scrolls floppy chapter from the drive repair page |
||
| (One intermediate revision by the same user not shown) | |||
| Line 123: | Line 123: | ||
Store drives dry, dust-free and at stable temperature. There is no evidence that periodically powering a drive "keeps the lubricant distributed": lubricant hardens with time and oxidation, not with disuse, and running a drive with hardened lubricant on its rails wears the rails. | Store drives dry, dust-free and at stable temperature. There is no evidence that periodically powering a drive "keeps the lubricant distributed": lubricant hardens with time and oxidation, not with disuse, and running a drive with hardened lubricant on its rails wears the rails. | ||
== Manufacturer manuals on this wiki == | |||
* '''[[Service Support Tranning Programs Laserwriter Technical Procedures Jan 1985]]''' — despite its | |||
title, this Apple binder contains the '''DuoDisk''' and '''UniDisk Technical Procedures''', including | |||
the '''DuoDisk Analog Card Chip Swapping Chart''' (symptom → chip by grid position) and both drives' | |||
illustrated parts lists with Apple part numbers. It also carries Apple's warning that a DuoDisk | |||
analogue card connected to a computer '''with the power on''' will show "fuzz" and an exploded | |||
'''C21'''.<ref name="lwtp85">Apple Computer, ''Apple LaserWriter Printer Technical Procedures'', preliminary version for internal use only, sections stamped rev. Jan 85 and rev. Feb 85. Held on this wiki inside the Service Support Training Programs binder scan, described at [[Service Support Tranning Programs Laserwriter Technical Procedures Jan 1985]] ([[:File:Service_Support_Tranning_Programs_Laserwriter_Technical_Procedures_Jan_1985.pdf]]).</ref> | |||
* '''[[Macintosh HDI-20 1.4 MB Drive Service Source]]''' — Apple's 18-page volume for the HDI-20 | |||
external floppy drive. It is '''Troubleshooting and Take Apart only''': there is no Basics and no | |||
Specifications chapter, so it gives no capacity, data rate, current draw or mechanism part number. | |||
What it does give is the take-apart for the '''cable interface board''' and the HDI-20 external | |||
cable, which is the part that actually fails on these because the connector takes the strain. | |||
* '''[[The Dead Mac Scrolls]]''' — Larry Pina's chapter 4 covers floppy drives, including | |||
'''replacing drive heads without test instruments''' (p. 265), which is the only published | |||
procedure of its kind held here. | |||
For Apple's own external drives, the manufacturer's symptom chart is on this wiki: [[Apple SuperDrive/HDI-20 Service Source]] covers the external 1.4 MB SuperDrive and the HDI-20, and it is worth reading before condemning a mechanism because two of its entries are normal behaviour rather than faults.<ref name="sssuperfdr">''Apple SuperDrive'', Apple ''Service Source'', 21 pages - hosted on this wiki as [[Apple SuperDrive/HDI-20 Service Source]]. "MS-DOS drive does not recognize disk formatted on 1.4 MB SuperDrive" is answered by formatting all disks on the MS-DOS drive first, and "drive reads/writes to 800K disks but not to HD disks" begins with "verify that drive is 1.4 MB SuperDrive".</ref> The specifications for the 800K mechanism are in [[Apple 3.5 Drive Service Source]], and the 5.25-inch drive's 300 rpm and current figures in [[Apple PC 5.25 Drive Service Source]]. | |||
== Related pages == | == Related pages == | ||