NTR ROM Upgrade
The NTR ROM Upgrade Kit consists of six ROMs. The following numbers are imprinted on the six Rev. 4.0 ROMs Rev. 4.0 ROMs, you must remove the ROMs and install them on the replacement board. Replacement NTR boards do not have Rev. 4.0 ROMs. Caution Old ROMs must be returned to Apple. Refer to August 1993 Service Notices for complete information on the Personal LaserWriter NTR ROM U63 H2 Repair Extension Program.
Power Supply LS
This topic applies only to the LS model. Before you begin, remove the following 1 Disconnect the power supply cable from power switch connector SW11 not shown . Remove the power cable from the cable retainer. 2 Disconnect the power supply cable from DC controller board connector J212 and remove the cable from the cable retainer. 3 Disconnect connector J101 by squeezing it and then lifting up. 4 Remove the three mounting screws and lift out the power supply.
Cleaning Page
Use the cleaning page if frequent paper jams occur in the fuser area or after replacement of the toner cartridge. The cleaning page removes excess toner from the fuser rollers and other rollers inside the printer. 1 Place several sheets of paper on the multipurpose tray. 2 Open the Cleaning page file located on the Personal LaserWriter Installation Disk. 3 Select Print from the File menu and Manual Feed in the subsequent dialog box and click OK. The printer will print a cleaning page. Place the...
Service Test Page
Successful printing of a service test page confirms print engine operation. There are three variations in how you run a service test page, depending on the model you are servicing. Each involves using a pencil or similar dowel-shaped tool to depress the service test button on the DC controller board or serial controller on the LS L . First remove the I O board. You can then access the test button through the 1 4-inch diameter opening in the I O shield. First remove the I O board bracket. You...
FaceUp Cover Assembly
This topic applies to all models of the printer. Before you begin, detach the face-up tray and remove the fuser assembly. 1 Using needlenose pliers, unhook the tension spring that connects the face-up cover to the front access door. 2 Open the face-up tray by pulling up on the green latch on the outside of the front access door. 3 Grip the bottom edge of the face-up cover with your fingertips and bend it slightly to release the holding pins at each end. The face-up cover should fall into your...
Fuser PCB Assembly
This topic applies to all models of the printer. Before you begin, remove the following Face-down delivery assembly Remove the screw that fastens the rod assembly to the front access door. Remove the black screw that secures connector J501 to the front access door. Remove the black screw that secures the cable retainer to the front access door. Lift out the cable retainer.
Transfer Guide Assembly
This topic applies to all models of the printer. No preliminary steps are required before you begin this procedure. Note This procedure also covers the removal of the left and right transfer roller mount assemblies and the transfer roller. 2 Note On the LS L the grip on the right side A has been closed into a ring. In the following step, you must first lift the left end of the assembly, then slide it out and to the left. Grasp each end of the transfer guide assembly and lift it out of the...
Serial Controller
This topic applies only to the LS L model. Before you begin, remove the following Awarning Never disconnect optical fiber cable J204 when the printer is powered on. Its invisible laser beam can damage your eyes. 1 Disconnect the following cables from the serial controller board Laser assembly board cable from J202 Scanner motor board cable from J203 Optical fiber cable from J204 Cassette feeder board cable from J205 High-voltage power supply cable from J206 Paper pickup sensor cable from J208...
Fuser Assembly
This topic applies to all models of the printer. No preliminary steps are required before you begin this procedure. 2 Lift up the face-down delivery assembly and remove the five gold-colored screws that secure the fuser assembly to the front access door. screwdriver, carefully pry between the fuser assembly and the front cover at the right edge A while you pull out the fuser assembly. Replacement Note Make sure that the connector pins at each end of the front access door make proper contact...
DC Controller Mount Plate
This topic applies only to the SC, NT, NTR, and LS models. Before you begin, remove the following Note Perform this procedure only when you're replacing the controller board itself. If you're replacing a deeper module, perform the DC Controller Awarning Never disconnect optical fiber cable J204 when the printer is powered on. Its invisible laser beam can damage your eyes. Note The following step does not apply to the Personal LaserWriter LS. 1 Carefully disconnect the cables from interconnect...