Replacement Note

Before replacing the contact cap, make sure that the heater bulb grounding lead wraps around the positioning posts on top of the terminal mount. screwdriver, remove the E-ring that secures the drive release cam to the fuser assembly. 1 2 Remove the drive release cam and the spring. Replacement Note Make sure that the gear arm assembly is in an upright position behind the toe of the drive release cam. 1 3 Remove the spring that connects the gear arm assembly with the right terminal mount. 1 4...

DC Power Supply

Note This procedure covers the take-apart of the DC power supply and the fuse. See next topic for removal of the distribution board. Remove the laser scanner cables from the cable clip behind the right support plate. 2 Remove the status panel cables from the four cable clips on the right support plate.

DC Controller Board

Cable Parallel J203

1 Remove the two screws that secure the I O board guide rail to the chassis and move the guide rail away from the DC controller board. Cover Interlock. Switch Actuator 3 Note Cabling is not shown for clarity. 2 Remove the two screws that secure the DC power supply and distribution board connectors. 3 Loosen the screw that secures the lower-cover interlock switch actuator to the chassis and lift off the metal actuator. Fuser assembly board cable from J206 Power supply block cable from J208...

IO Board Configuration

Note The I O board should not have to be configured. Switches are pre-set at the factory and generally should not have to be changed. The NT and NTX boards come from the factory configured to communicate via Apple Talk. If you want to communicate via the serial port, refer to the Owner's Guide for the proper DIP switch settings. The SC board ships from Apple with the SCSI priority set to 4. The IIf and IIg boards have a port arbitration feature that supports concurrent communication via all...

Mirror Assembly

Note Removal of the mirror assembly requires the first removal of the heater cover and shutter assembly. 1 Remove the screw that secures the contact cover to the preconditioning exposure assembly. Lift off the cover. 2 Remove the two screws that secure the preconditioning exposure assembly to the contact arm. Remove the five screws that secure the cartridge guide to the upper clamshell. Remove the cartridge guide.

Transfer Guide Assembly

Apple Roof Assembly

Before you begin, remove the cassette tray. Note This procedure also covers the take apart of the separation pad. 1 Depress the release button and open the top cover. 2 Remove the two screws that secure the upper transfer guide to the upper transfer assembly. 3 Remove the two screws that secure the transfer guide assembly to the cassette holder. Lift the transfer guide assembly from the printer. Collar (shown in correct position) Replacement Note Make sure that the copper collar at the end of...

Fuser Heater Bulb

Before you begin, remove the fuser assembly. Note The fuser heater bulb is an orderable subcomponent of the fuser assembly. It provides the heat necessary to fuse toner to paper. 1 Open the fuser delivery assembly. 2 Loosen the screw (1) that secures the fuser cover to the fuser assembly. 3 Lift the fuser cover and the fuser cleaning felt. 4 Remove the screw (2) that secures the left contact cap to the fuser assembly. Lift off the cap. Remove the two screws that secure the fuser board to the...

Installation Verification Nt Ntx Iif and IIg

Note The following materials are required to verify installation LocalTalk connector box for the Macintosh LocalTalk connector box with a Mini DIN-8 connector (for the printer) Printer Installation diskette. 1 Switch on the printer and wait about 3 minutes. Note If the printer delivers a startup test page, proceed to the next page. If not, refer to Print Engine Check in Flowcharts. 3 Connect a LocalTalk connector box to the 8-pin Mini- 4 Connect a LocalTalk connector box to the printer port at...

Connector Locators

On the following pages are diagrams of the connectors listed below Connector J103 connects the fuser to the fuser safety PCA inside the power supply block. If you measure continuity between the two pins of J103, the fuser bulb and thermoprotector are intact. Fuser Assembly (Removed from Printer) Connector J502 connects the DC power supply with the power supply block. This illustration shows the printer with the DC power supply removed. Connector J601 connects the high-voltage power supply to...

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. < < < < < < < < < < Switch off and unplug the printer, and remove the bottom panel and lower cover. Locate capacitor C211 on the DC controller board....

BuiltIn Fonts

SC Times, Helvetica, Courier, and Symbol NT, NTX, NTX-J Times, Helvetica, Helvetica Narrow, Courier, Symbol, Palatino, ITC Avant Garde, ITC Bookman, New Century Schoolbook, ITC Zapf Chancery, and ITC Zapf Dingbats IIf, IIg 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...

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 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 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...

Laser Power Output Check

Before you begin, remove the following Note The Laser Power Checker 076-01 21 has been discontinued. If you have the tool, follow the procedure to measure the power output of the laser diode. No adjustments can be made to laser power circuitry in LaserWriter II. Warning Do not open the laser access hatch or disconnect the optical fiber cable when the printer is switched on. The reflected laser beam, though invisible, can permanently damage your eyes. 1 Open the laser access hatch on the laser...

Ntx Rom Upgrade

Caution To prevent ESD damage to components, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. The LaserWriter II NTX ROM upgrade provides the following enhancements Software switching between PostScript and other emulation modes D630 and HPLJ on LocalTalk ports Support of multiple hard drives and hard drives larger than 40 MB Additional characters with HPLJ emulation mode 1 Switch off and unplug the printer. 2 Remove the I O board and place it on a grounded workbench...

Startup Test Page

Laserwriter Fineprint

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. --Printer WuiLsigJiSilmo- Name --Printer WuiLsigJiSilmo- Name PostScript, Diablo 630, or Hewlett Packard LaserJet Plus emulation NTX only Communication Protocol RS-232 serial or AppleTalk Size of hard drive, if connected,...

Corona Wire Restringing

Corona Wire Tension

1 Unsnap and remove both corona wire termination covers. 2 Remove the tension spring from the end of the corona wire. 3 Loosen the two screws that hold the nylon guide wire to the corona assembly. Remove the nylon guide wire. Fold back approximately 1 4 length of the new corona wire and twist six to eight times to form a loop at the end of the wire. Hook the looped end over the retaining pin at the right end of the assembly. Stretch the wire across the length of the corona assembly until it...

Main Motor Assembly

Before you begin, remove the following Note The drive gear assembly is a part of the main motor assembly. 1 Remove the five screws that secure the main motor assembly to the chassis. Lift out the main motor. To remove the drive gear assembly, remove the four screws that secure it to the main motor. Separate the main motor from the drive gear assembly.

Pressure Assembly

Before you begin, remove the following Note This assembly engages with the cassette tray to elevate and press the paper against the pickup roller. Caution In this procedure be careful not to crimp or loosen any of the connectors at the laser scanner assembly. 1 Remove the ten screws that secure the main body block to the chassis. Lift off the main body block. There are three screw lengths short S , medium M , and long L . Make sure to replace them correctly. Turn the main body block upside down...

IlfIIg 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. After running this diagnostic, switch off the...

Ozone Filter

Filter Access Door

No preliminary steps are required before you begin Iter Case this Procedure. Caution Be careful when handling the ozone filter. It is brittle and can break if handled roughly. Note There are two filter case designs. In the newer design, you access the ozone filter through a special access door. In the earlier design you must remove the cover set and filter case from the printer before removing the ozone filter. 1 Open the access door. Pull on the ozone filter tab and slide the filter out of the...

Power Supply Block

Upper Power Supply

Before you begin, remove the following Note The power supply block sits directly beneath the upper fan and is the point where line voltage enters the printer. Included in the power supply block are the power switch, the fuser safety board, and circuit breaker CB1. 1 Remove the four screws that secure the power supply block to the chassis. Lift the power supply block from the printer. Note If you are returning the power supply block to Apple, first remove the upper fan and fan duct.