Apple LaserWriter Printers Volume I

The Apple Service Guide for LaserWriter Printers, Volume I is Apple's pocket on-site service guide for its first two generations of laser printers: the LaserWriter and LaserWriter Plus, the LaserWriter II SC/NT/NTX/IIf/IIg, and the Personal LaserWriter SC/NT/LS. Apple's part number is 072-0631-B and the running footer throughout is ASG-LaserWriter Printers Jan 92.

Unlike the Service Source volumes it condenses, the Apple Service Guide was written to be carried to a customer site, and each printer gets a short self-contained booklet with the same headings.

Contents of each printer's booklet

• Exploded View (p. 2)
• Parts List (pp. 3-4)
• Major Assemblies (p. 5)
• I/O Board Identification (p. 6)
• Specifications (p. 7)
• Status Lights (p. 8)
• Test Prints (p. 9)
• Troubleshooting (pp. 10-51)
• LaserWriter Plus ROM Upgrade (pp. 52-53)
• Laser Power Adjustment (p. 54)
• Image Skew Adjustment (pp. 55-56)
• Preventive Maintenance (pp. 57-60)
• Wiring Diagram (p. 61)

Page numbering restarts within each booklet, so cite the printer and the booklet page rather than a PDF page number.

The guide also carries Apple's on-site information-gathering checklist, its safety pages (high-voltage warning, invisible laser radiation warning, toner safety, ESD rules) and instructions for connecting to a Macintosh and to an MS-DOS computer.

What this guide does not contain

Apple says so itself, in the guide: "The following parts list is not comprehensive. Only selected service modules and replacement parts are listed. When ordering a replacement module or spare part, be sure to check the part number in the guide against the current price pages in the Apple Service Programs manual." So the part numbers here are a selection, and possibly superseded. There is no schematic and no component-value list; the wiring diagram shows interconnection only. It is a condensation, and Apple states it does not replace the Apple Service Technical Procedures or Service Source.

Three pages, one document

This wiki holds three separate pages for this one guide, each with its own scan:

• this page (217 pages);
• Apple Service Guide For Laserwriter Printers Volume I 072-0631-b 1992 - text-identical to this file, a second scan of the same copy; and
• Apple Service Guide Laserwriter Printers January 1992 - a third scan, whose cover reads LaserWriter Printers Service Guide January 1992 without the "Volume I" wording, but whose running footers and contents are the same January 1992 guide.

Treat all three as one source. A figure appearing on all three is not corroborated; it is the same page scanned three times.

Pages that cite this document

• Apple Personal LaserWriter 300
• Apple LaserWriter, Apple LaserWriter Plus, Apple LaserWriter II NT, Apple LaserWriter II SC
• LaserWriter II Service Source - the full service manual this guide condenses.

Download: Apple LaserWriter Printers Volume I.pdf