Apple LaserWriter300 Spécifications Page 1

Service Source K PLW 300 & LW 4/600 PS Personal LaserWriter 300, Personal LaserWriter 320,LaserWriter 4/600 PS

Basics Image Formation System - 8 residual toner on the photosensitive drum surface. Then, as a final step, the primary charging roller lays a unif

Take Apart Fixing Film Assembly - 19 3 Disconnect the two connectors on the left side of the fuser.Connectors

Take Apart Fixing Film Assembly - 20 4 Disconnect the connector on the right side of the fuser.5 Open the the top of the fuser.Connector

Take Apart Fixing Film Assembly - 21 6 Hold both ends of the fixing film assembly and carefully lift it out of the fuser.

Take Apart Delivery Roller Assembly - 22 Delivery Roller Assembly Before you begin, remove the cover.Delivery RollerAssembly

Take Apart Delivery Roller Assembly - 23 1 Using a flat-blade screwdriver, release the white plastic tab that holds one side of the delivery roller

Take Apart Passive Delivery Rollers - 24 Passive Delivery Rollers Before you begin, remove the following:• Cover• Delivery roller assemblyPassive De

Take Apart Passive Delivery Rollers - 25 1 Push in the tabs on each side of the passive delivery roller from the underneath side.2 Pull up the rolle

Take Apart Laser/Scanner Assembly - 26 Laser/Scanner Assembly Before you begin, remove the cover.Laser/ScannerAssembly

Take Apart Laser/Scanner Assembly - 27 1 Disconnect the fan cable from the laser/scanner assembly.Fan Cable

Take Apart Laser/Scanner Assembly - 28 2 Note: Do not remove the fourth black screw that secures the plastic cover to the body of the laser/scanne

Basics Status LEDs - 9 Status LEDs The printer has three status LEDs: Ready/In Use, Paper-Out, and Paper-Jam.While on standby, the printer's R

Take Apart Fan - 29 Fan Before you begin, remove the cover.Fan

Take Apart Fan - 30 1 Disconnect the fan cable.2 Using a flat-blade screwdriver, push down and release the bottom tab that secures the fan to the ch

Take Apart Mirror Assembly - 31 Mirror Assembly Before you begin, remove the cover.MirrorAssembly

Take Apart Mirror Assembly - 32 1 Remove the two screws that hold the mirror assembly to the chassis.2 Lift the mirror out of the printer. Note: Y

Take Apart Intake Guide - 33 Intake Guide Before you begin, remove the cover.IntakeGuide

Take Apart Intake Guide - 34 1 Remove the self-tapping screw that secures the intake guide to the chassis.2 Release the two tabs that secure the fro

Take Apart Lock Guide - 35 Lock Guide Before you begin, remove the cover.Lock Guide

Take Apart Lock Guide - 36 1 Push in the center tab and release the lock guide.2 LIft the guide out of the printer.

Take Apart Transfer Roller Assembly - 37 Transfer Roller Assembly No preliminary steps are required before you begin this procedure. Note: You may

Take Apart Transfer Roller Assembly - 38 1 Using a flat-blade screwdriver, pry up the left end of the transfer roller assembly (the end with the gea

Basics Status LEDs - 10 The four possible LED conditions for this printer are listed below:Warmup orProcessingReady Paper-Out Paper-JamNormalStartup

Take Apart Transfer Roller Assembly - 39 3 Note: When removing the transfer roller assembly, be careful not to lift out the bushing. Hold the tra

Take Apart Transfer Mount Assemblies - 40 Transfer Mount Assemblies Before you begin, remove the transfer roller assembly.Left MountAssemblyRight Mo

Take Apart Transfer Mount Assemblies - 41 1 Remove the screws that secure the transfer mount assemblies to the chassis.2 Lift the mount assemblies o

Take Apart I/O Board - 42 I/O Board Before you begin, remove the cover. Note: Before returning an I/O board to Apple, remove the metal cover. Kee

Take Apart I/O Board - 43 1 Remove the five screws that secure the I/O board to the chassis.2 Pull the I/O board straight out and remove it from the

Take Apart Motor Assembly - 44 Motor Assembly Before you begin, remove the following:• Cover• I/O boardMotorAssembly

Take Apart Motor Assembly - 45 1 Remove the three screws that secure the motor assembly to the chassis.2 LIft out the motor assembly.

Take Apart Controller Assembly - 46 Controller Assembly Before you begin, remove the following:• Cover• I/O board• Fuser assemblyController Assembly

Take Apart Controller Assembly - 47 Note: Because the mirror assembly protrudes above the printer chassis, you must protect the mirror when you tu

Take Apart Controller Assembly - 48 3 Note: Be careful not to remove the center screw that secures the solenoid to the controller board. Remove th

Basics Toner Cartridge - 11 Toner Cartridge Caution: Avoid placing the toner cartridge near a CRT, disk drive unit, or floppy disk. Do not place

Take Apart Controller Assembly - 49 4 Hold the controller assembly by the cassette guides and lift the controller assembly out of the printer.Contro

Take Apart HVT Connector Assembly - 50 HVT Connector Assembly Before you begin, remove the following:• Cover• I/O board• Fuser assembly• Controller

Take Apart HVT Connector Assembly - 51 1 Push in the tabs on each side of the HVT connector assembly and release the assembly.2 Lift the HVT connect

Take Apart Pickup Solenoid - 52Pickup SolenoidBefore you begin, remove the following:• Cover• I/O board• Fuser assembly• Controller assemblyPickupSol

Take Apart Pickup Solenoid - 531 Remove the screw that secures the solenoid to the controller assembly.2 Disconnect the solenoid cable from connector

Take Apart Drive Assembly - 54Drive AssemblyBefore you begin, remove the following:• Cover• I/O boardDriveAssembly

Take Apart Drive Assembly - 551 Loosen the two self-tapping screws on the top of the motor assembly. 2 Remove the six self-tapping screws that secu

Take Apart Pickup Motor Assembly - 56Pickup Motor AssemblyBefore you begin, remove the following:• Cover• I/O board• Drive assembly• Fuser assembly•

Take Apart Pickup Motor Assembly - 57Note: You must support the top of the printer while it is upside down to protect the mirror assembly. Place a

Take Apart Pickup Motor Assembly - 583 Remove the two screws that secure the pickup motor assembly to the chassis.4 Lift the pickup motor assenbly ou

Basics Toner Cartridge - 12 avoid such exposure:– Don't leave the rear access door open on the printer when the toner cartridge is installed.–

Take Apart Pickup Motor Assembly - 595 Push up the white plastic tab that secures the pickup roller to the pickup motor assembly. 6 Pull out on the

Take Apart Roller Assembly - 60Roller Assembly Before you begin, remove the cover.Roller Assembly

Take Apart Roller Assembly - 611 Remove the screw that secures the roller assembly to the chassis.2 Lift the roller assembly from the printer.RollerA

Take Apart Feeder Guide Assembly - 62Feeder Guide AssemblyBefore you begin, remove the following:• Cover• I/O board• Fuser assembly• Controller assem

Take Apart Feeder Guide Assembly - 631 Remove the three screws that secure the feeder guide assembly to the chassis.2 Lift the feeder guide assembly

Take Apart Arm Registration Assembly - 64Arm Registration AssemblyBefore you begin, remove the following:• Cover• I/O board• Fuser assembly• Controll

Take Apart Arm Registration Assembly - 651 Remove the HVT shield and lift the arm registration assembly out of the printer.HVT Shield

Take Apart Cover Interlock Actuator - 66Cover Interlock ActuatorBefore you begin, remove the following:• Cover• I/O board• Fuser assembly• Controller

Take Apart Cover Interlock Actuator - 671 Push in the top tab and slide up the cover interlock actuator.2 Remove the cover interlock actuator from th

Take Apart Scanner Interconnect Assembly - 68Scanner Interconnect AssemblyBefore you begin, remove the following:• Cover• Laser/Scanner assembly• I/O

Basics LaserWriter Safety - 13 LaserWriter Safety Unplug PrinterLaserWriter printers operate at high voltages. To prevent serious injury, always sw

Take Apart Scanner Interconnect Assembly - 691 Release the two tabs that secure the scanner interconnect assembly to the chassis.

Take Apart Scanner Interconnect Assembly - 702 Lift the assembly out of the chassis.Replacement Note: You should hear a distinctive click when you r

Take Apart Chassis - 71ChassisThe chassis is what remains after removing the following:• Cover• All assembliesChassis

Service Source K Upgrades PLW 300 & LW4/600 PS

Upgrades LW 4/600 Memory Upgrade - 1 LW 4/600 Memory Upgrade To increase this printer’s ability to image highly complex pages you may install the 4M

Service Source K Additional Procedures PLW 300 & LW 4/600 PS

Additional Procedures Mirror Assembly Maintenance - 1 Mirror Assembly Maintenance Using a blower brush, clean the mirror assembly while it is still

Additional Procedures Mirror Assembly Maintenance - 2 Refer to the Adjustments chapter for information on how to adjust the mirror after reinstallin

Additional Procedures Transfer Roller Maintenance - 3 Transfer Roller Maintenance Before you begin, remove the following:• Cover• Transfer roller as

Additional Procedures Transfer Roller Maintenance - 4 If the transfer roller becomes dirty, clean it using dry, lint-free paper, which should produ

Basics LaserWriter Safety - 14 Fuser HeatThe fuser assembly becomes very hot during printer operation. Before servicing the fuser assembly, switch

Service Source K Adjustments PLW 300 & LW 4/600 PS

Adjustments Mirror Assembly - 1 Mirror Assembly No preliminary steps are required before you begin this procedure.The reflecting mirror is factory-a

Adjustments Mirror Assembly - 2 2 Place letter-size paper in the cassette tray and initiate a service test page. Note: Always use letter-size or A

Adjustments Mirror Assembly - 3 3 Using a straight edge, draw a line across the top of the test page pattern (line 1). Note: The skew in the grap

Adjustments Mirror Assembly - 4 5 Measure the error between the first and second horizontal lines as shown. MeasureHere

Adjustments Mirror Assembly - 5 If the error is more than 1.5 mm, shift the scale in 1 mm increments to correct the error. Shift the mirror towards

Adjustments Mirror Assembly - 6 incorrect, repeat the adjustment procedure until the error is less than 1.5 mm.

Adjustments Registration Adjustment - 7 Registration Adjustment You must perform the registration adjustment procedure whenever you replace the cont

Adjustments Registration Adjustment - 8 1 Using a jeweler's screwdriver, reset VR301 on the controller assembly to "0."2 Switch on th

Adjustments Registration Adjustment - 9 4 Measure the distance from the top of each page to the edge of the printed test page pattern.5 Calculate th

Service Source K Specifications PLW 300 & LW 4/600 PS

Adjustments Registration Adjustment - 10 6 Adjust VR301 so that the average value becomes 2.0 mm (see the table to the left). Note: For example, i

Service Source K Exploded View PLW 300 & LW 4/600 PS

Exploded View 1922-0464Rear DoorAssembly922-0460PowerConnectorCover922-0463 (LW 320)922-1385 (4/600)Top Door076-0683Button Lock922-1506 (LW 4/600 P

Specifications General - 1 General Engine Canon P90 engine Printing Method Electrophotography using single-component, dry-jumping development Optic

Specifications General - 2 System Requirements Macintosh computer with system 6.0.7 or later

Service Source K Basics PLW 300 & LW 4/600 PS

Specifications Intro Date - 3 Intro Date Personal LaserWriter 300 June 1993 Personal LaserWriter 320 January 1994 LaserWriter 4/600 PS June 1995

Specifications Logic Board - 4 Logic Board CPU PLW 300: N/APLW 320: AMD 29205 processorLW 4/600 PS: AMD 29200 RISC processor RAM PLW 300: 512 KPL

Specifications Logic Board - 5 I/O PLW 300: Serial, externally clockedPLW 320: LocalTalkLW 4/600PS: LocalTalk (EtherTalk and TokenTalk connectivity

Specifications Performance - 6 Performance Printing Speed Approximately 4 pages/min. (A4). Actual performance depends on the images printed and the

Specifications Paper - 7 Paper Paper Weights Cassette feed:17-20 lb., single-sheet, photocopy bondManual feed:17-28 lb., letterhead and colored stoc

Specifications Paper - 8 Transparency material, labels, and postcard paper are delivered face-up only and must be removed by hand.

Specifications Fonts - 9 Fonts Serif Fonts ITC Bookman, Courier, New Century Schoolbook, Palatino, Times, Chicago, and New York Sans Serif Fonts ITC

Specifications Electrical - 10 Electrical Line Voltage US/Japan: 100-120 V; 50-60 HzEurope/Austrailia: 220-240 V; 50 Hz Power Consumption Operatin

Specifications Physical - 11 Physical Dimensions Width: 15.2 in. (38.5 cm)Depth: 14.9 in. (37.9 cm)Height: 6.3 in. (16.1 cm) Weight 15.4 lb. (7 k

Specifications Environmental - 12 Environmental Temperature Operating: 50-90.5° F (10-32.5° C)Storage: 32-95° F (0-35° C) Humidity Operating: 20-

Basics Paper Paths - 1 Paper Paths There are two paper paths in this family of printers. Paper is fed from the paper cassette or manual-feed slot a

Service Source K Troubleshooting PLW 300 & LW 4/600 PS

Troubleshooting General - 1 General The first part of this chapter contains quick-reference troubleshooting information for the Personal LaserWriter

Troubleshooting 320 Power-On Self Test - 2 320 Power-On Self Test The Personal LaserWriter 320 goes through a self diagnostic each time that you plu

Troubleshooting 320 Power-On Self Test - 3 • Finally the Jam LED extinguishes when no errors are found in the engine. Note: In a functional printe

Troubleshooting Engine Diagnostic - 4 Engine Diagnostic The Personal LaserWriter 320 and LaserWriter 4/600 PS have self-diagnostic capability built

Troubleshooting Engine Diagnostic - 5 1. All LEDs on for 1 second2. All LEDs off for 1 second3. <Error configuration> for 1 second4. All L

Troubleshooting Engine Diagnostic - 6Controller Assembly Fuser Assembly Fan MotorRAM Card Laser Assembly Misc. EngineLED Error Configurations

Troubleshooting Troubleshooting Tips - 7 Troubleshooting Tips Isolating Controller Board Problems If you are unable to print a service test page (se

Troubleshooting Troubleshooting Tips - 8 Guard against light exposure when printing service test pages and other printouts by covering the toner car

Troubleshooting Troubleshooting Tips - 9 You should interrupt the printing process after the image has been transferred to the paper, but BEFORE the

Basics Paper Paths - 2Delivery RollerPaper Delivery SelectorTonerCartridgeTransfer RollerPickup RollerFuserFace-Down PathFace-Up PathTonerCartridgeT

Troubleshooting Circuit Board Diagrams - 10 Circuit Board Diagrams On the following pages are diagrams of the circuit boards and high-voltage contac

Troubleshooting Circuit Board Diagrams - 11LEDs123Personal LaserWriter 300I/O BoardJ1InterfaceConnectorJ2ControllerBoardConnector(opposite side)

Troubleshooting Circuit Board Diagrams - 12LEDs123Personal LaserWriter 320I/O BoardJ1InterfaceConnectorJ2ControllerBoardConnector(opposite side)J104

Troubleshooting Circuit Board Diagrams - 132 MB RAMExpansion CardThe 2 MB RAM Expansion Card mates into J104 onthe Personal LaserWriter 320 I/O boar

Troubleshooting Circuit Board Diagrams - 146 MB RAMExpansion CardThe 6 MB RAM Expansion Card mates into J104 onthe Personal LaserWriter 320 I/O boar

Troubleshooting Circuit Board Diagrams - 15J204SW301J601J202SW201J201Pickup SolenoidVR301J206J103FusesHVT AssemblyController BoardAssemblyThe contro

Troubleshooting Wiring Diagram - 16 Wiring Diagram The wiring diagram for this printer can be found on the next page. The detail in this document i

32FUSER ASSEMBLYJ901FAN1J804FANTAC+12VGNDMAINMOTOR1 2 3 4 5 6 7 8 9 10 11 12J20213 14 1516 17 18GND(+5V)+5V/VDOUT/SCNONAPCSHSCNCLKGNDFANON+12VBSGND+

Troubleshooting Service Test Page - 18 Service Test Page The service test page is generated by the controller assembly. It serves to confirm print

Troubleshooting Service Test Page - 19 LaserWriter 4/600 PS To generate a service test page on the LaserWriter 4/600 PS, raise the edge of the print

Basics Sensing System Theory - 3 Sensing System Theory There are four paper sensors in this family of printers: PS304, PS303, PS302, and PS301. PS

Troubleshooting Service Test Page - 20 Personal LaserWriter 300/320 To generate a service test page on the Personal LaserWriter 300 or 320, perform

Troubleshooting Service Test Page - 21 Remove the printer cover (refer to "Cover" in Take-Apart) and plug in the printer. Defeat the pape

Troubleshooting Service Test Page - 22 Cover the toner cartridge with a piece of paper to prevent exposure of the drum.Press down on the toner cartr

Troubleshooting Power Failure - 23 Power Failure AC power failure 1 Verify correct voltage at power outlet.2 Check power cord connections at printer

Troubleshooting No Paper Pickup - 24 No Paper Pickup No pickup (manual feed)1 Check arm registration assembly and replace if broken.2 Replace pickup

Troubleshooting Printer Jams - 25 Printer Jams Paper jam LED lights when there's no paper jam

Troubleshooting Motor Failure - 26 Motor Failure Motor doesn't rotate 1 Verify motor is making good contact with controller assembly at connect

Troubleshooting Fan Failure - 27 Fan Failure Fan doesn't come on 1 Verify fan is making good contact with laser/scanner assembly at connector J

Troubleshooting Fuser Assembly Failure - 28 Fuser Assembly Failure No power to fuser assembly1 Verify fuser assembly is properly seated and making g

Troubleshooting Printer Drops After 3 Pages - 29 Printer Drops After 3 Pages The printer drops connections to the Macintosh after printing three pag

Basics Sensing System Theory - 4 Each consists of an actuator and a U-shaped photo interrupter that is soldered to the controller assembly. If the

Troubleshooting Environmental Problems - 30 Environmental Problems Room lights flicker when printer cycles to print.There have been reports of the P

Flowcharts and TablesTroubleshooting YesSTARTNo1. Connect the printer to the Macintosh computer that is using the LaserWriter 300 driver.2. Op

Flowcharts and TablesTroubleshooting YesNo1. Remove the printer cover and I/O board.2. Remove any paper jams.3. Install the toner cartridge and fi

Flowcharts and TablesTroubleshooting YesSTARTNo1. Connect the printer to the Macintosh computer that is using the LaserWriter 8 driver.2. Open the

Flowcharts and TablesTroubleshooting YesNo1. Remove the printer cover and I/O board.2. Remove any paper jams.3. Install the toner cartridge and fi

4 Flowcharts and TablesTroubleshooting Important As you proceed through the steps in a table, remember to retry the printer eachtime you change its p

Flowcharts and TablesTroubleshooting Table 1. No Power to Fan (Continued) Step Check Result Action 6 Is the fan cable pinched under the top tab tha

4 Flowcharts and TablesTroubleshooting Table 3. No Paper Pickup from Cassette Tray (Continued) Step Check Result Action 2 Was the toner cartridge ins

Flowcharts and TablesTroubleshooting Table 4. No Paper Pickup From Manual-Feed Slot Step Check Result Action 1 Is the printer set up for manual feed

4 Flowcharts and TablesTroubleshooting Table 5. Paper Jams in Pickup/Transfer Area (Continued) Step Check Result Action 4 Inspect the arm registrat

Basics Sensing System Theory - 5 cassette-fed and manual-fed paper. If the paper does not reach the top position of this sensor in the required tim

Flowcharts and TablesTroubleshooting Table 6. Paper Jams in Fuser/Delivery Area (Continued) Step Check Result Action 5 Remove the rear door assembly

Flowcharts and TablesTroubleshooting All-Blank PageSee Table 7Light/Faded ImageSee Table 9Black VerticalLine(s)See Table 11HorizontalBandingSee Tabl

Flowcharts and TablesTroubleshooting Table 7. All-Blank Page Step Check Result Action 1 Has the sealing tape been removed from the toner cartridge,

4 Flowcharts and TablesTroubleshooting Table 9. Uniformly Light/Faded Image Over Entire Page Step Check Result Action 1 Remove the toner cartridge a

Flowcharts and TablesTroubleshooting Table 10. Uniformly Dark Image Over Entire Page Step Check Result Action 1 Adjust the print density, using the

4 Flowcharts and TablesTroubleshooting Table 12. White Vertical Lines, Sharp and Well-Defined Step Check Result Action 1 Is there any type of physica

Flowcharts and TablesTroubleshooting Table 14. Stairstepping/Vertical Lines Jagged or Shaky Step Check Result Action 1 Is the laser/scanner assembly

4 Flowcharts and TablesTroubleshooting Table 16. Black Horizontal Lines, Sharp and Well-Defined Step Check Result Action 1 Does the problem appear on

Flowcharts and TablesTroubleshooting Table 18. Skewed Print Step Check Result Action 1 Adjust the mirror assembly (see “Mirror Adjustment”). Does th

4 Flowcharts and TablesTroubleshooting Table 20. Toner on Back of Page Step Check Result Action 1 Clean the transfer roller using a dry, lint-free c

Basics Image Formation System - 6 Image Formation System The nucleus of the printer is the image formation system, which includes the photosensitive

Flowcharts and TablesTroubleshooting Table 22. No PhotoGrade on Personal LaserWriter 320 Step Check Result Action 1 Have you installed the 6 MB RAM

Service Source K Take Apart PLW 300 & LW 4/600 PS

Take Apart Connector Covers - 1 Connector Covers No preliminary steps are required before you begin this procedure.PowerConnectorCoverInterfaceConne

Take Apart Connector Covers - 2 1 Open the connector covers.2 Release the tabs at the top and bottom of each connector cover, and remove the connect

Take Apart Rear Door Assembly - 3 Rear Door Assembly No preliminary steps are required before you begin this procedure.Rear Door Assembly

Take Apart Rear Door Assembly - 4 1 Open the rear door assembly.2 Push the assembly to the right to free the left hinge and to the left to free the

Take Apart Cover - 5 Cover No preliminary steps are required before you begin this procedure.Cover

Take Apart Cover - 6 1 Open the rear door assembly and side connector doors. ConnectorCoverRear DoorAssemblyConnectorCover

Take Apart Cover - 7 2 Push the button on the right side of the printer and open the top door of the cover.3 Remove the four screws that secure the

Take Apart Cover - 8 4 Grip the two back corners of the cover and pull out to release the back tabs. 5 Grip the two front corners of the cover and

Basics Image Formation System - 7 The Printing Process Upon receiving a print signal from the I/O board, the printer's controller assembly send

Take Apart Light Pipe - 9 Light Pipe Before you begin, remove the cover.Light Pipe

Take Apart Light Pipe - 10 1 Turn the cover upside down. 2 Using a flat-blade screwdriver, pry up the small lockwashers that secure the light pipe t

Take Apart Top Door Assembly - 11 Top Door Assembly Before you begin, remove the cover.Top DoorAssembly

Take Apart Top Door Assembly - 12 1 Turn the cover upside down.2 Using needlenose pliers, lift up the end of each spring and release the spring.3 Gr

Take Apart Button Lock Assembly - 13 Button Lock Assembly Before you begin, remove the cover.ButtonLockAssembly

Take Apart Button Lock Assembly - 14 1 Turn the cover upside down.2 Using a flat-blade screwdriver, release the tabs on either side of the button lo

Take Apart Fuser Assembly - 15 Fuser Assembly Before you begin, remove the cover.Fuser Assembly

Take Apart Fuser Assembly - 16 1 Remove the three screws that secure the fuser assembly to the chassis.2 Grip the metal edges of the fuser assembly

Take Apart Fixing Film Assembly - 17 Fixing Film Assembly Before you begin, remove the following:• Cover• Fuser assembly

Take Apart Fixing Film Assembly - 18 1 Using needlenose pliers, release the springs on the left and right sides of the fuser (left side shown).2 Ope