Apple Laserwriter Ii Service Manual

Service Source

LaserWriter II

LaserWriter II SC, LaserWriter II NT,

LaserWriter II NTX, LaserWriter IIf, LaserWriter IIg

Service Source

Basics

LaserWriter II

Basics Product Information - 1

Product Information

The printers covered in this manual are

• LaserWriter II SC

• LaserWriter II NT

• LaserWriter II NTX

• LaserWriter IIf

• LaserWriter IIg

Compatibility:

Except for I/O boards components, all parts are compatible among the five models. Refer to Illustrated Parts and Take Apart chapters for more information. Refer to “Print Engine Check” in Flowcharts for Troubleshooting information.

Basics Startup Test Page - 2

Startup Test Page

LaserWriter II printers generate a startup test page approximately 2 – 3 minutes after you switch on the printer.

Except for the IISC, the startup test page also shows unit-specific configuration information. The following pages describe each element of the startup test page.

Basics Startup Test Page - 3

I/O Board

Type

II NT/NTX Startup Test Page

Printer Name

Number of pages the I/O board has produced

Configuration PostScript, Diablo 630, or Hewlett Packard LaserJet Plus™ emulation (NTX only)

Communication Protocol RS-232 serial or AppleTalk

Fonts in ROM

Installed RAM

Size of hard drive, if connected, and number of fonts it contains (NTX only)

Version of ROM installed

Basics Startup Test Page - 4

IIf Startup Test Page

Printer Name

Communication parameters and printer control

I/O Board

Type

Number of pages the I/O board has produced

language selected for an individual printer port

Version of ROM installed

Fonts in ROM

Installed RAM

FinePrint feature enabled

Basics Startup Test Page - 5

IIg Startup Test Page

Printer Name

Communication parameters and printer control

I/O Board

Type

Number of pages the I/O board has produced

language selected for an individual printer port

Version of ROM installed

Fonts in ROM

Installed RAM

FinePrint feature enabled

Basics Startup Test Page - 6

IISC Startup Test Page

The LaserWriter IISC test page consists only of vertical lines. The printer will generate a test page only if its SCSI address has been set to 7 prior to powering up.

Note:

Be sure to set the SCSI address back before you resume printing.

Basics Service Test Page - 7

Service Test Page

The service test page is generated by the DC controller board and serves to confirm print engine operation. To generate this test page, remove the bottom panel cap located at the rear of the printer. Insert a screwdriver or similar dowel-shaped tool through the quarter inch diameter opening and press the service test page button.

Basics Preventive Maintenance - 8

Preventive Maintenance

Before performing any preventive maintenance, be sure to do the following:

1 Check the page count on the startup test. If the I/O board

has been replaced or upgraded, check the repair log label affixed to the bottom of the printer or consult with the customer to determine page count.

2 Power off and unplug the printer.

3 Allow the fuser assembly rollers to cool.

4 Prepare your work area for electrostatic discharge

prevention.

5 Spread a drop cloth under the work area to protect the

floor from grease and spilled toner.

Caution:

Never use an ammonia-based cleaner on the

Basics Preventive Maintenance - 9

LaserWriter II. These cleaners can discolor the plastic.

Caution:

the printer has been off at least 5 minutes to allow the fuser assembly to cool.

The service provider should clean the following items every 12 months or during each service call.

Service Point Tool/Solvent

Primary corona wire Cleaning brush supplied with

Transfer corona wire Cotton swab and isopropyl

Transfer guide Cloth dampened with water

Fuser rollers Fuser cleaning pad

Before servicing the fuser rollers, make sure that

printer

alcohol

Basics Preventive Maintenance - 10

Service Point Tool/Solvent

Exterior case Cloth dampened with water

Separation claws Cloth dampened with alcohol

Paper guide Cloth dampened with alcohol

Lower delivery guide Cloth dampened with alcohol

Feeder guide Cloth dampened with water

Registration rollers Cloth dampened with water

Basics Parts Replacement Schedule - 11

Parts Replacement Schedule

Perform the following tasks every 50,000 prints:

• Replace the ozone filter

• Check upper and lower fan operation.

Replace the following parts every 100,000 prints:

• Fuser assembly

• Transfer guide assembly

• Preconditioning exposure assembly

• Paper feed roller assembly

• Transfer corona assembly

The LaserWriter II refurbishment kit (P/N 652-0597) contains one each of the parts listed above.

Service Source

Speciﬁcations

LaserWriter II

Specifications General - 2

General

Engine

Printing Method

Optical System

Resolution

Imaging Languages Supported

Canon SX engine

Electrophotography using single-component, dry toner

Semiconductor laser and a rotating six-faced prism scanning

mirror

300 dpi

SC: QuickDraw NT: PostScript and a subset of the Diablo 630 printer NTX/NTX-J: PostScript, a subset of the Diablo 630 printer, and a

subset of the Hewlett-Packard LaserJet Plus

Specifications General - 3

f/g: PostScript Level 1 and 2 and HP LaserJet IIP (HP PCL4)

Note:

NTX-J does not support emulation mode.

Specifications Intro Dates - 4

Intro Dates

SC, NT, and NTX

IIf and IIg

July 1990

October 1991

Specifications Logic Board - 5

Logic Board

CPU

DRAM

SC: Motorola 68000 microprocessor (7.45 MHz) NT: Motorola 68000 microprocessor (11.16 MHz) NTX/NTX-J: Motorola 68020 microprocessor (16.67 MHz) f: Motorola 68030 microprocessor (20.0 MHz) g: Motorola 68030 microprocessor (25.0 MHz)

SC: 1 MB NT: 2 MB NTX: 2 MB, expandable to 12 MB NTX-J: 4 MB, expandable to 12 MB f: 2 MB/5MB, expandable to 32 MB g: 5 MB/8MB, expandable to 32 MB Ê

Specifications Logic Board - 6

ROM

I/O

SC: 16 KB NT: 1 MB NTX/NTX-J: 1 MB, expandable to 8 MB on expansion board f: 2 MB standard; ROM expansion slot provided g: 2 MB standard; ROM expansion slot provided

SC: SCSI, Apple Desktop Bus (ADB) NT: RS-232/422, LocalTalk, ADB NTX/NTX-J: RS-232/422, LocalTalk, SCSI, ADB f: RS-232/422; LocalTalk; SCSI g: RS-232/422; LocalTalk; SCSI; Ethernet

Specifications Performance - 7

Performance

Printing Speed

Duty Cycle

Minimum Life Expectancy

Major Service Interval

8 pages per minute (all paper sizes except legal) 7 pages per minute (legal size)

Note:

Actual performance depends on the application.

No limit in pages per month

300,000 pages

100,000 copies

Specifications Performance - 8

Printable Area

All measurements are in inches:

SC US Letter : 8.00 by 10.60 Legal: 6.72 by 12.50 A4: 8.00 by 11.27 B5: 6.67 by 9.43 #10 Envelopes: 3.84 by 9.10

NT, NTX, and NTX-J US Letter : 8.00 by 10.78 Legal: 8.00 by 13.78 A4: 7.79 by 11.08 B5: 6.45 by 9.76 #10 Envelopes: 3.84 by 9.10

Specifications Performance - 9

IIf Ê US Letter : 8.11 by 10.79 Legal: 8.00 by 10.78 (Maximum printable area with 2 MB of

RAM. Prints up to 8.00 x 13.78 with 5 MB of RAM. Prints up

to 8.00 x 13.78 using PhotoGrade with 8 MB of RAM.) A4: 7.89 by 11.44 B5: 6.72 by 9.81 #10 Envelopes: 3.84 by 9.10

IIg US Letter : 8.11 by 10.79 Legal: 8.11 by 13.79 (Legal-size documents require 8 MB of

RAM to print with PhotoGrade.) A4: 7.89 by 11.44 B5: 6.72 by 9.81 #10 Envelopes: 3.84 by 9.10

Specifications Paper - 10

Paper

Paper W eights

Cassette Sizes

Capacity In

Cassette feed:16-24 lb., single-sheet, photocopy bond Manual feed:16-36 lb., letterhead and colored stock, standard-

weight transparency material, envelopes, and labels

US letter standard; legal, A4, B5, and envelope cassettes optional

Cassette:200 sheets Manual: single sheets Envelope cassette:15 envelopes

Face-down tray:100 sheets Face-up tray:20 sheets

Use manual feed for letterhead, colored stock, standard-weight transparency material, and labels.

Specifications Built-In Fonts - 11

Built-In Fonts

NT, NTX, NTX-J

IIf, IIg

Times, Helvetica, Courier, and Symbol

Times, Helvetica, Helvetica Narrow, Courier, Symbol, Palatino,

ITC Avant Garde, ITC Bookman, New Century Schoolbook, ITC

Zapf Chancery, and ITC Zapf Dingbats

Times, Helvetica, Helvetica Narrow, Courier, Symbol, Palatino,

ITC Avant Garde, ITC Bookman, New Century Schoolbook, ITC

Zapf Chancery, ITC Zapf Dingbats, and Emulator.

Note:

Built-in fonts can be expanded using an optional font expansion board. All LaserWriter II printers support TrueType when using LaserWriter driver 6.1 or greater.

Specifications Environmental - 12

Environmental

Temperature

Humidity

Operating: 50–90.5°F (10–33°C) Storage:38–95° F (3–35°C)

Operating: 20-80% relative humidity Storage: 10-80% relative humidity

Printing: Under 60 dB(A) Standby: Under 50 dB(A)

Specifications Electrical - 13

Electrical

Line V oltage

Power Consumption

US/Japan:100-115 V, 50-60 Hz Europe/Australia:220-240 V, 50 Hz

Standby: 170 W (average) Operating: 900 W maximum (115 V) 780 W maximum (220 V) 880 W maximum (240 V)

Specifications Physical - 14

Physical

Dimensions

Weight

Width: 20 in. (51 cm) Depth: 18.9 in. (48 cm) Height: 8.5 in. (21.6 cm)

46 lb. (21 kg)

Service Source

Troubleshooting

LaserWriter II

Troubleshooting IIf/IIg Diagnostic/ - 1

IIf/IIg Diagnostic

Set the rotary switch on the back of the printer to 4 and connect the LaserWriter II Test Connector to the DB-25 serial port (or simply jumper pins 4 and 22). Switch on the printer. Under normal conditions, LEDs should flash during startup, and then fix on the “diagnostic executing” configuration for about 2 minutes. If no error is found, all LEDs flash and a page prints. If the LEDs indicate an error, go to the appropriate topic in Flowcharts.

(Diagnostic Executing)

Fuser Assembly Error

Laser/Scanner Error

I/O Controller Board Error

Replace ROM #1

Replace ROM #2

Replace ROM #3

(No Error Found)

Replace SIMM #2

Replace SIMM #3

Replace SIMM #4

Replace SIMM #5

Replace SIMM #6

Replace SIMM #7

Replace ROM #4

Replace SIMM #1

After running this diagnostic, switch off the printer, remove the Test Connector, and reset the rotary switch to its original setting.

Replace SIMM #8

Troubleshooting Capacitor Discharge - 2

Capacitor Discharge

When there is a failure of the fusing system, the DC controller board shuts off current to the fuser roller heater and charges capacitor C211 to prevent overheating. If there is a failure of the fusing system, you must turn the power off for about 30 minutes or manually discharge the capacitor before switching power back on.

C211

DC Controller Board

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