Editing Apple LaserWriter 12/640 PS Documentation

Apple's service manual and user's manual for the [[Apple LaserWriter 12/640 PS]].

== Service Source ==
The '''LaserWriter 12/640 PS''' volume of Apple's ''Service Source'' is a 242-page service manual. The PDF was produced on 13 April 1996 (FrameMaker 5.0.1, Acrobat Distiller 2.1).<ref name="ss">Apple Computer, Inc., ''LaserWriter 12/640 PS'' (''Service Source''), 242 pp. Hosted as [[:File:LaserWriter 12-640 PS Service Source.pdf]].</ref> Its overview chapter was written for technicians who knew the earlier LaserWriters and lists what is new in this one.<ref name="ov">''LaserWriter 12/640 PS'' Service Source, Overview pp. 1-15 (PDF pp. 3-17).</ref>

=== Contents ===
* Overview (PDF pp. 3-17): options, paper path, duplexer, sheet feeder, face-up tray, duplex scan order, design changes
* Principles of Operation (PDF pp. 19-28 and 45-73): print process, paper transportation with a roller diameter table, image creation, mechanical drive, functions of the main components
* Specifications (PDF pp. 30-44): engine, I/O controller, environment, accessories with order numbers
* Troubleshooting (PDF pp. 75-113): status panel, POST, PostScript reporting, EPOST and its codes, mirror cleaning, duplexer jams, multipurpose tray faults, testing the engine without the I/O board, a false jam at start-up, and image-quality tables P-1 to P-18
* Upgrades (PDF pp. 115-116): RAM
* Take Apart (PDF pp. 118-188)
* Exploded View (PDF pp. 190-199)
* REA Program (PDF pp. 201-242): Apple's Repair Extension Authorization repairs (removal of capacitor C102 from the DC controller, exit actuator burnishing, cassette pinch roller check, multipurpose pressure plate reset) and the take-apart steps they need

=== What it settles ===
The engine is a Fuji Xerox P893 with a 780 nm, 5 mW laser; the controller an AMD Am29040 at 30 MHz with 4 MB of ROM and 4 MB of RAM expandable to 64 MB.<ref name="spec">''LaserWriter 12/640 PS'' Service Source, Specifications, Engine and I/O Controller pp. 2-9 (PDF pp. 31-38).</ref> The REA document names the capacitor Apple had removed (C102) and the replacement DC controller board without it (661-1441).<ref name="rea">''LaserWriter 12/640 PS'' Service Source, REA Program, Capacitor Removal pp. 4-7 (PDF pp. 204-207).</ref>

=== What it does not contain ===
There is no schematic and there are no component values. The exploded views give part numbers, but the text layer of those pages is jumbled, so read them from the images. The manual refers to animations and a separate "Multipurpose Tray Paper Jams" PDF on the Service Source CD, which are not included.<ref name="ts">''LaserWriter 12/640 PS'' Service Source, Troubleshooting, Multipurpose Tray Paper Jams p. 17 (PDF p. 91).</ref>

== User's manual ==
The user's manual (Apple part number 034-0211-A, from the PDF's title field) covers set-up, software for Mac OS, Windows and UNIX, paper, the options, maintenance, troubleshooting and technical information, in 354 pages. This copy starts at chapter 1 and has no cover, title page or contents.<ref name="um">Apple Computer, Inc., ''LaserWriter 12/640 PS'' user's manual, 034-0211-A, 354 pp., PDF created 19 July 2001. Hosted as [[:File:LaserWriter 12-640 PS User's Manual.pdf]].</ref> Its maintenance chapter gives the toner cartridge life (about 6,000 pages), the service interval (120,000 pages) and the fixing roller temperature (about 400 &deg;F, 204 &deg;C).<ref name="umm">''LaserWriter 12/640 PS'' user's manual, Chapter 10, Maintenance, pp. 217-218 (PDF pp. 216-217).</ref>

== Pages that cite these documents ==
* [[Apple LaserWriter 12/640 PS]]
* [[Apple LaserWriter 12/640 PS General Maintenance]]
* [[Apple LaserWriter 12/640 PS Troubleshooting Guide]]

<pdf> File:LaserWriter 12-640 PS Service Source.pdf </pdf>

Download: [[:File:LaserWriter 12-640 PS Service Source.pdf|LaserWriter 12-640 PS Service Source.pdf]]

<pdf> File:LaserWriter 12-640 PS User's Manual.pdf </pdf>

Download: [[:File:LaserWriter 12-640 PS User's Manual.pdf|LaserWriter 12-640 PS User's Manual.pdf]]

== References ==
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[[Category:Service Manuals]]
[[Category:Apple Service Source]]
[[Category:Apple Documentation]]