Apple Laserwriter Ii Service Manual

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LaserWriter II

LaserWriter II SC, LaserWriter II NT, LaserWriter II NTX, LaserWriter IIf, LaserWriter IIg

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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

 

 

 

 

 

II NT/NTX Startup Test Page

 

Printer

 

 

Name

Configuration

 

 

 

 

PostScript, Diablo 630, or Hewlett Packard

 

 

LaserJet Plus™ emulation (NTX only)

I/O Board

 

Communication Protocol

Type

 

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

Number of pages the I/O board has produced

Basics

Startup Test Page - 4

 

 

Printer

IIf Startup Test Page

Name

I/O Board

Type

Communication parameters and printer control language selected for an individual printer port

Version of ROM installed

Fonts in ROM

Installed RAM

FinePrint feature enabled

Number of pages the I/O board has produced

Apple Laserwriter Ii Service Manual

Basics

Startup Test Page - 5

 

 

Printer

IIg Startup Test Page

Name

I/O Board

Type

Communication parameters and printer control language selected for an individual printer port

Version of ROM installed

Fonts in ROM

Installed RAM

FinePrint feature enabled

Number of pages the I/O board has produced

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:

1Check 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.

2Power off and unplug the printer.

3Allow the fuser assembly rollers to cool.

4Prepare your work area for electrostatic discharge prevention.

5Spread 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: Before servicing the fuser rollers, make sure that 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

 

printer

 

 

Transfer corona wire

Cotton swab and isopropyl

 

alcohol

 

 

Transfer guide

Cloth dampened with water

 

 

Fuser rollers

Fuser cleaning pad

 

 

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.

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Specifications

LaserWriter II

Specifications

General - 2

 

 

 

Engine

Printing Method

Optical System

Resolution

Imaging Languages

Supported

General

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

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)

DRAM

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

 

Specifications

Logic Board - 6

 

 

 

 

ROM

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

I/O

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

8 pages per minute (all paper sizes except legal)

7 pages per minute (legal size)

Note: Actual performance depends on the application.

Duty Cycle

Minimum Life

Expectancy

Major Service

Interval

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

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 Weights

Cassette feed:16-24 lb., single-sheet, photocopy bond

Manual feed:16-36 lb., letterhead and colored stock, standardweight transparency material, envelopes, and labels

Cassette Sizes

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

Capacity In

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

Specifications

Built-In Fonts - 11

 

 

 

SC

NT, NTX, NTX-J

IIf, IIg

Built-In Fonts

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

 

 

 

Line Voltage

Power Consumption

Electrical

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

Width: 20 in. (51 cm)

 

 

Depth: 18.9 in. (48 cm)

 

 

Height: 8.5 in. (21.6 cm)

Weight

46 lb. (21 kg)

 

 

 

 

 

 

 

 

 

 

 

 

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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)

(No Error Found)

Fuser Assembly Error

Replace SIMM #2

Laser/Scanner Error

Replace SIMM #3

I/O Controller Board Error

Replace SIMM #4

Replace ROM #1

Replace SIMM #5

Replace ROM #2

Replace SIMM #6

Replace ROM #3

Replace SIMM #7

Replace ROM #4

Replace SIMM #8

Replace SIMM #1

 

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

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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