Apple 12/640PS Specifikace

Service Source K LaserWriter 12/640 PS

Overview Duplex Scan Anomalies - 8 Duplex Scan Anomalies After side one prints during a duplex job, the paper parks itself onto a horizontal shelf b

Troubleshooting Print Quality Problems - 8 P-6 Vertical Streaks Step Actions and QuestionsAction(When There Is Problem) Toner cartridgeIs the prob

Troubleshooting Print Quality Problems - 9 P-7 Horizontal Streaks Step Actions and QuestionsAction(When There Is Problem) Toner cartridgeIs the pr

Troubleshooting Print Quality Problems - 10 P-8 Spot Deletions Step Actions and QuestionsAction(When There Is Problem) Paper conditions (moisture,

Troubleshooting Print Quality Problems - 11P-9 SpotsStep Actions and QuestionsAction(When There Is Problem) Paper conditions (moisture, warp, etc.)Is

Troubleshooting Print Quality Problems - 12P-10 Residual ImageStep Actions and QuestionsAction(When There Is Problem) Paper conditions (moisture, war

Troubleshooting Print Quality Problems - 13P-11 BackgroundStep Actions and QuestionsAction(When There Is Problem) Charging and developmentIs the tone

Troubleshooting Print Quality Problems - 14P-12 Skewed ImageStep Actions and QuestionsAction(When There Is Problem) Paper feedIs the paper cassette i

Troubleshooting Print Quality Problems - 15P-13 Damaged PrintsStep Actions and QuestionsAction(When There Is Problem) Paper conditions (moisture, war

Troubleshooting Print Quality Problems - 16P-14 Unfused ImageStep Actions and QuestionsAction(When There Is Problem) Paper conditions (moisture, warp

Troubleshooting Print Quality Problems - 17P-15 No PhotoGradeStep Actions and QuestionsAction(When There Is Problem) RAM Upgrade12 MB of RAM is requi

Overview Duplex Scan Anomalies - 9 the software, the I/O controller flips the imaging data accordingly to counteract the reversal of the paper. The

Troubleshooting Print Quality Problems - 18P-16 No Duplex PrintingStep Actions and QuestionsAction(When There Is Problem) DriverAre you using the dri

Troubleshooting Print Quality Problems - 19P-17 Duplex Page Upside-DownStep Actions and QuestionsAction(When There Is Problem) DriverAre you choosing

Troubleshooting Print Quality Problems - 20P-18 No Multipurpose Tray PrintingStep Actions and QuestionsAction(When There Is Problem) Did you recently

Service Source K Upgrades LaserWriter 12/640 PS

Upgrades RAM Upgrade - 1 RAM Upgrade The LaserWriter 12/640 PS comes with 4 MB of RAM, an amount that you can increase up to 64 MB. In addition to

Upgrades RAM Upgrade - 2 Total Slot C/D Slot A/B4 MB 0 MB 4 MB8 MB 4 MB 4 MB8 MB 0 MB 8 MB12 MB 4 MB 8 MB12 MB 8 MB 4 MB16 MB 8 MB 8 MB16 MB 0 MB 16

Service Source K Take Apart LaserWriter 12/640 PS

Take Apart Left Cover - 1 Left Cover Before you begin, pull out the cassette and open the top cover. 1 Remove the two screws which fasten the rear e

Take Apart Multipurpose Cover - 2 Multipurpose Cover Before you begin, pull out the cassette. 1 Open the multipurpose cover. 2 Disengage the pins at

Take Apart Multipurpose Tray - 3 Multipurpose Tray Before you begin, remove the multipurpose cover.1 Using a small flat-blade screwdriver, release t

Overview Miscellaneous - 10 Miscellaneous Fuser Pressure Roller The fuser pressure roller provides an opposing surface to the fuser heater roller,

Take Apart Top Cover - 4 Top Cover No preliminary steps are required before you begin this procedure. Note : Peform this procedure only if you

Take Apart Top Cover - 5 trim is the 13 x 3.75 inch plastic piece above the delivery rollers.) 3 Release the tab that retains the right hinge pin an

Take Apart Main Cover - 6 Main Cover Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray Note : The mai

Take Apart Main Cover - 7 the rear side that secure the main cover to the chassis.2 Flex outward the edge of the cover just below the power switch a

Take Apart I/O Board - 8 I/O Board Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Main cover Note

Take Apart I/O Board - 9 (with bracket) from the printer. Note : The I/O board connects to the engine through a receptacle connector. Remove the I

Take Apart I/O Shield - 10 I/O Shield Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Main cover1 R

Take Apart I/O Shield - 11 connector. Remove the I/O shield carefully to avoid damaging this connector

Take Apart DC Controller Board - 12 DC Controller Board Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose t

Take Apart DC Controller Board - 13 is accessible through a rounded notch in the fuser assembly.3 Pull the DC controller board straight out of the p

Overview Miscellaneous - 11 Beam Detection Laser beam detection occurs outside of the laser/scanner assembly, in the start-of-scan (SOS) sensor loca

Take Apart Laser/Scanner Assembly - 14 Laser/Scanner Assembly Before you begin, remove the following:• Left cover• Multipurpose cover• Multipur

Take Apart Laser/Scanner Assembly - 15 Caution : Do not remove any of the three screws inside the square recesses.3 Lift the laser/scanner assembly

Take Apart Registration Guide Assembly - 16 Registration Guide Assembly Before you begin, remove the following:• Left cover• Multipurpose cover

Take Apart Registration Guide Assembly - 17 registration guide assembly.

Take Apart Fan Duct - 18 Fan Duct Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Main cover1 Remov

Take Apart Fan - 19 Fan Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Main cover• Fan duct1 Disconnect

Take Apart Power Supply Assembly - 20 Power Supply Assembly Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpo

Take Apart Power Supply Assembly - 21 power supply. 3 Disconnect the large white connector next to the power switch. 4 Remove the seven screws and s

Take Apart Power Supply Assembly - 22 5 Remove the six screws which secure the power supply board to the plate. (One of them secures the grounding w

Take Apart Cartridge Press Actuator - 23 Cartridge Press Actuator Before you begin, remove the following:• Left cover• Multipurpose cover• Mult

Overview Miscellaneous - 12 paper after it passes the deflection guide in route to face-down delivery on top of the printer. One Fan There is only

Take Apart Cartridge Press Actuator - 24 slide the guide plate down and outward to remove it from the printer.

Take Apart Cover Interlock Actuator - 25 Cover Interlock Actuator Before you begin, remove the following:• Left cover• Multipurpose cover• Mult

Take Apart Cover Interlock Actuator - 26 and remove the cover interlock actuator.

Take Apart Link Interlock Switch - 27 Link Interlock Switch Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tr

Take Apart Mirror Assembly - 28 Mirror Assembly Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Main co

Take Apart Drive Transfer Assembly - 29 Drive Transfer Assembly Before you begin, remove the following:• Left cover• Multipurpose cover• Multip

Take Apart Main Drive Assembly - 30 Main Drive Assembly Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray•

Take Apart Transfer Roller Assembly - 31 Transfer Roller Assembly Before you begin, remove the following:• Left cover• Multipurpose cover• Mult

Take Apart Transfer Roller Assembly - 32 sure to fully seat the three tabs in the metal guide into the chassis.

Take Apart Registration Roller Assembly - 33 Registration Roller Assembly Before you begin, remove the following:• Left cover• Multipurpose cover•

Overview Miscellaneous - 13 duplex printing nor does it enable PhotoGrade. Upgrades are required if you want either of these additional features. N

Take Apart Paper Deflector Solenoid - 34 Paper Deflector Solenoid Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurp

Take Apart Delivery Sensor - 35 Delivery Sensor Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Mai

Take Apart Delivery Sensor - 36 3 As necessary, remove the actuator(s) and springs(s) from the mounting plate.

Take Apart Paper Deflector Guide - 37 Paper Deflector Guide Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tr

Take Apart Cassette Feed Roller Bearing - 38 Cassette Feed Roller Bearing Before you begin, remove the following:• Left cover• Multipurpose cover• M

Take Apart Cassette Feed Roller - 39 Cassette Feed Roller Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray

Take Apart Pickup Motor and Solenoid - 40 Pickup Motor and Solenoid Before you begin, remove the following:• Left cover• Multipurpose cover• Mu

Take Apart Pickup Motor and Solenoid - 41 drive assembly, and lift off the cover plate.3 Remove the one gear which conceals the pickup solenoid, rem

Take Apart Registration Chute Assembly - 42 Registration Chute Assembly Before you begin, remove the following:• Left cover• Multipurpose cover

Take Apart Registration Chute Assembly - 43 tration chute assembly.2 Pull out the right side portion first and then take out the entire registratio

Overview Miscellaneous - 14 Service Test Page You may print a service test page by jumpering connector J101 on the I/O controller board. Conse

Take Apart Cassette Pickup Roller - 44 Cassette Pickup Roller Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose

Take Apart Multipurpose Frame Assembly - 45 Multipurpose Frame Assembly Before you begin, remove the following:• Left cover• Multipurpose cover

Take Apart Multipurpose Frame Assembly - 46 2 Remove the four screws and pull the multipur-pose frame assembly from the chassis.MultipurposeFrame As

Take Apart Manual Feed Solenoid - 47 Manual Feed Solenoid Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray

Take Apart Manual Feed Pickup Roller - 48 Manual Feed Pickup Roller Before you begin, remove the following:• Left cover• Multipurpose cover• Multipu

Take Apart Manual Feed Pickup Roller Holder - 49 Manual Feed Pickup Roller HolderBefore you begin, remove the following:• Left cover• Multipurpose c

Take Apart Manual Feed Clutch Gear - 50 Manual Feed Clutch GearBefore you begin, remove the following:• Left cover• Multipurpose cover• Multipurpo

Take Apart Manual Feed Clutch Gear - 512 Press the lever gear and pull the manual feed clutch gear from the multipurpose frame assembly.Note: Do not

Take Apart Pressure Plate - 52 Pressure PlateBefore you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Main cove

Take Apart Pressure Plate - 53assembly.Replacement Note: Place the spring over the positioning pin and hook the top of the spring in the small metal

Overview Miscellaneous - 15 Top Cover Closure The closing of the top cover initiates several more events than in previous printers. They are listed

Take Apart Manual Feed Paper-Present Sensor - 54 Manual Feed Paper-Present SensorBefore you begin, remove the following:• Left cover• Multipurpose

Take Apart Manual Feed Paper-Present Sensor - 551 Press the claw and remove the sensor.

Take Apart Separation Pad - 56 Separation PadBefore you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Main cove

Take Apart Separation Pad - 57the assembly about 90 degrees, slide it to align with the cuts in the support shaft, and remove it.

Take Apart Delivery Roller Shaft - 58 Delivery Roller ShaftBefore you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose t

Take Apart Delivery Roller Shaft - 59shaft to clear the holes and remove the shaft from the printer.

Take Apart Fuser Assembly - 60 Fuser Assembly Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Main

Take Apart Fuser Assembly - 61 3 Raise the gear-side of the fuser and remove the entire assembly. Replacement Note : There are two exit actuators a

Take Apart Fuser Pressure Roller - 62 Fuser Pressure RollerBefore you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose t

Take Apart Fuser Exit Sensor - 63 Fuser Exit SensorBefore you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Mai

Service Source K Principles of Operation LaserWriter 12/640 PS

Take Apart Top Cover Latches - 64 Top Cover LatchesBefore you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Mai

Take Apart Cover Latch Shaft - 65 Cover Latch ShaftBefore you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Mai

Take Apart Pickup Drive Assembly - 66 Pickup Drive AssemblyBefore you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose t

Take Apart Pickup Drive Assembly - 672 Disconnect the harness of the pickup solenoid from the connector of the relay harness from the cassette size s

Take Apart Preregistration Pinch Roller Assy - 68 Preregistration Pinch Roller AssyBefore you begin, remove the following:• Left cover• Multipurpo

Take Apart Preregistration Pinch Roller Assy - 692 Release the tabs and remove the pinch roller holder from the chassis.3 Remove the pinch roller ass

Service Source K Exploded View LaserWriter 12/640 PS

Exploded View 1 Overall Exploded ViewMultipurposeTray922-2183Multipurpose Cover922-2185Left Cover922-1944Universal 250Sheet Cassette922-1945Cassett

Service Source K REA Program LaserWriter 12/640 PS

REA Program Introduction - 1 Introduction A Repair Extension Authorization (REA) program has been initiated for the LaserWriter 12/640 PS printer. T

Principles of Operation Print Process - 1 Print Process Print Process Overview The print process consists of the stages shown below, during which a

REA Program Eligible Printers - 2 Eligible Printers Before performing this repair, you must first confirm that the printer is eligible for the progr

REA Program Take Apart - 3 Take Apart Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Main cover• I/O sh

REA Program Capacitor Removal - 4 Capacitor Removal Caution : While performing this procedure, use a grounded conductive workbench mat and grounding

REA Program Capacitor Removal - 5 Removal by Hand This is the preferred method of removing the capacitor and leads.1 Hold the board in one hand and

REA Program Capacitor Removal - 6 2 Using an appropriate cutting tool, remove the two leads (if they have remained on the board after you removed th

REA Program Capacitor Removal - 7 Removal by Desoldering This is an alternate method of removing capacitor C102.1 Locate the two points on the solde

REA Program Actuator Modification - 8 Actuator Modification Caution : The two upper exit actuators above the fuser are extremely susceptible to dama

REA Program Actuator Modification - 9 1 Locate the exit actuator near the left end of the fuser pressure roller.2 Pull the exit actuator, along

REA Program Actuator Modification - 10 3 Gently rub a small piece of paper against the tip of the actuator about 10-15 times. This burnishing a

REA Program Actuator Modification - 11 4 Reinstall the actuator spring onto the exit actuator. (See the illus-tration for correct posi-tioning

Service Source K Overview LaserWriter 12/640 PS

Principles of Operation Print Process - 2 Print Process Diagram and Paper Path Mirror AssemblyToner CartridgeCM BladeBCRFuser RollerFuserRollerPress

REA Program Actuator Modification - 12 6 Use your finger to rock the exit actuator back and forth to make sure it moves freely and has a slight spri

REA Program Pinch Roller Inspection - 13 Pinch Roller Inspection The pinch roller in the cassette provides a pressure surface against which the feed

REA Program Pinch Roller Inspection - 14 also serve to prevent the condition from developing in functioning units. Checking Alignment Remove the cas

REA Program Pinch Roller Inspection - 15 into the slit between the pinch roller and the plastic molded paper guide. With the cassette correctly ori

REA Program Pinch Roller Inspection - 16 Replacement Note : There are four claws on the bottom of the cassette cover. Seat the claws in place and

REA Program Pressure Plate Reset - 17 Pressure Plate Reset The pressure plate is the surface in the multipurpose tray that presses paper up against

REA Program Pressure Plate Reset - 18 Before you begin, remove the following from the multipurpose frame assembly:• Manual feed pickup roller• Manua

REA Program Pressure Plate Reset - 19 1 Carefully release the pivot pin at one end of the pressure plate and lift the plate from the multipurpose fr

REA Program Pressure Plate Reset - 20 2 Reinstall the pressure plate, making sure the leaf spring on the underside of the plate rests on top of the

REA Program Pressure Plate Reset - 21 3 After removing and reinstalling the pressure plate, test its movement. If it has the half-inch play referen

Principles of Operation Print Process - 3 Print Process Description 1 Charging During this stage, the drum surface receives a uniform negative char

REA Program Confirming Printer Operation - 22 Confirming Printer Operation After completing the two procedures and reassembling the printer, perform

REA Program Confirming Printer Operation - 23 After confirming printer operation, you must mark the printer to show that it has undergone the REA wo

REA Program First-Remove Procedures - 24 First-Remove Procedures The following topics are taken from the take apart chapter of the LaserWriter 12/64

REA Program Left Cover - 25 Left Cover Before you begin, pull out the cassette and open the top cover. 1 Remove the two screws which fasten the

REA Program Multipurpose Cover - 26 Multipurpose Cover Before you begin, pull out the cassette. 1 Open the multipurpose cover. 2 Disengage the pins

REA Program Multipurpose Tray - 27 Multipurpose Tray Before you begin, remove the multipurpose cover.1 Using a small flat-blade screwdriver, release

REA Program Main Cover - 28 Main Cover Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray Note : The ma

REA Program Main Cover - 29 the rear side that secure the main cover to the chassis.2 Flex outward the edge of the cover just below the power switch

REA Program I/O Shield - 30 I/O Shield Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Main cover1

REA Program I/O Shield - 31 connector. Remove the I/O shield carefully to avoid damaging this connector

Principles of Operation Print Process - 4 2 Exposure During this stage, the laser beam scans across the negatively charged drum surface.The laser b

REA Program DC Controller Board - 32 DC Controller Board Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose

REA Program DC Controller Board - 33 is accessible through a rounded notch in the fuser assembly.3 Pull the DC controller board straight out of the

REA Program Delivery Roller Shaft - 34 Delivery Roller Shaft Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose t

REA Program Fuser Assembly - 35 Fuser Assembly Before you begin, remove the following:• Left cover• Multipurpose cover• Multipurpose tray• Main

REA Program Fuser Assembly - 36 3 Raise the gear-side of the fuser and remove the entire assembly. Replacement Warning : The two exit actuators abov

REA Program Multipurpose Frame Assembly - 37 Multipurpose Frame Assembly Before you begin, remove the following:• Left cover• Multipurpose cove

REA Program Multipurpose Frame Assembly - 38 2 Remove the four screws and pull the multipur-pose frame assembly from the chassis.MultipurposeFr

REA Program Manual Feed Pickup Roller - 39 Manual Feed Pickup Roller Before you begin, remove the following:• Left cover• Multipurpose cover• M

REA Program Manual Feed Pickup Roller Holder - 40 Manual Feed Pickup Roller Holder Before you begin, remove the following:• Left cover• Multipu

REA Program Manual Feed Clutch Gear - 41 Manual Feed Clutch Gear Before you begin, remove the following:• Left cover• Multipurpose cover• Multi

Principles of Operation Print Process - 5 3 Development During this stage, the electrostatic latent image on the drum surface attracts toner and fo

REA Program Manual Feed Clutch Gear - 42 2 Press the lever gear and pull the manual feed clutch gear from the multipurpose frame assembly.

Principles of Operation Print Process - 6 3 Development (cont.) 0 VAbout -330 VAbout -250 VConductor Layerof the DrumDrum Surface Attraction Rolle

Principles of Operation Print Process - 7 3 Development (cont.) The diagram below illustrates the change of the potential as the drum surface passe

Principles of Operation Print Process - 8 4 Transfer During this stage, the toner transfers from the drum to the paper.The bias transfer roller (B

Principles of Operation Print Process - 9 5 Discharge During this stage, the paper comes off the drum surface.The detack saw applies a negative ch

Principles of Operation Print Process - 10 6 Fusing During this stage, heat and pressure fix toner to the paper. The toner image transferred from t

Service Source K Specifications LaserWriter 12/640 PS

Overview About This Overview - 1 About This Overview This overview briefly describes the servicing issues of the LaserWriter 12/640 PS, especia

Specifications Introduction - 1 Introduction Specifications information for this product can be found in this chapter and also in the Spec Database,

Specifications Engine - 2 Engine Marking Engine Fuji Xerox P893 laser-xerographic Laser Type: Semiconductor laser GaAlAsWavelength: 780 nmOutput pow

Specifications Engine - 3 Life Expectancy (Toner Cartridge) Life expectancy is 6,000 pages when printing text documents with average page coverage (

Specifications Engine - 4 Paper Sizes and Capacity Supports U.S. letter, A4, B5, executive, and legal in the standard paper cassette. The paper cass

Specifications Engine - 5 Dimensions Printer onlyHeight 9.5 in. 24.2 cm)Width 15.9 in. (40.5 cm)Depth 16.7 in. (42.4 cm)Printer with optional duplex

Specifications Engine - 6 Weight Approximately 30 lb. (14 kg) Voltage Requirements U.S.103.5 to 126.5 VAC, 58 to 62 HzEurope/Australia198 to 264 VAC

Specifications Engine - 7 Power Consumption Energy-saving mode26 WStandby average100/120 V, approximately 125 W220/240 V, approximately 120 WOperati

Specifications I/O Controller - 8 I/O Controller Microprocessor AMD Am29040 30-MHz RISC microprocessor ROM 4 MB (including 35 Type 1 fonts) RAM 4 MB

Specifications I/O Controller - 9 Ports LocalTalkParallelAAUI Ethernet port with three protocols:EtherTalkNovell NetWare IPX (PSERVER or RPRINTER)TC

Specifications I/O Controller - 10 Grayscale Imaging Standard85 lines/inch dithered halftone, 101 gray levels106 lines/inch dithered halftone, 129 g

Overview General - 2 General The LaserWriter 12/640 PS is a 600 dpi, 12 ppm monochrome laser printer that is positioned as the workgroup laser

Specifications I/O Controller - 11 Fonts on Disk Sixty-four fonts are provided with the LaserWriter 12/640 PS, including such fonts as ITC Avant Gar

Specifications I/O Controller - 12 Fonts in ROM PostScript The following fonts are resident in the printer ROM:AvantGarde Book, AvantGarde BookObliq

Specifications I/O Controller - 13 PCL The following PCL fonts are resident in the printer ROM:Times Roman, Time Bold, Time Italic, Times Bold Itali

Specifications Environmental Information - 14 Environmental Information Operating Temperature 50¡ to 90¡ F (10¡ to 32¡ C) Operating Humidity 15 to

Specifications Finished Goods Accessories - 15 Finished Goods Accessories Ethernet Apple Ethernet Thin Coax Transceiver M0329Z/BApple Ethernet Twist

Principles of Operation Print Process - 11 7 Cleaning During this stage, any residual toner on the drum is cleaned off to prepare for the next prin

Principles of Operation Paper Transportation - 12 Paper Transportation Paper Path Flowchart The chart below shows the parts that feed paper through

Principles of Operation Paper Transportation - 13 Paper Path Diagram The cross-sectional diagram below illustrates the elements indicated in the pr

Principles of Operation Print Image Creation - 14 Print Image Creation Print Image Generation The image data signal (VIDEO) is sent from the I/O con

Principles of Operation Print Image Creation - 15 Laser/Scanner Assembly Structure and Operation The laser light source used for the LaserWriter 12/

Overview Options - 3 Options There are three options that are available for the Laser-Writer 12/640 PS: • Duplexer unit• Face-up catch tray• 500-sh

Principles of Operation Print Image Creation - 16 Note : One horizontal line of an image is drawn by scanning the pulsating laser beam across the dr

Principles of Operation Mechanical Drive - 17 Mechanical Drive The generation and transmission of mechanical drive in the LaserWriter 12/640 PS is s

Principles of Operation Mechanical Drive - 18 1 Pickup Motor Mechanical Drive (Part 1 of 2) The drive force generated by the pickup motor is transm

Principles of Operation Mechanical Drive - 19 2 Pickup Motor Mechanical Drive (Part 2 of 2) The drive force generated by the pickup motor is also t

Principles of Operation Mechanical Drive - 20 3 Main Motor Mechanical Drive (Part 1 of 3) The drive force from the main motor is transmitted to the

Principles of Operation Mechanical Drive - 21 4 Main Motor Mechanical Drive (Part 2 of 3) The drive force from the main motor is also transmitted t

Principles of Operation Mechanical Drive - 22 5 Main Motor Mechanical Drive (Part 3 of 3) The drive force from the main motor is also transmitted t

Principles of Operation Function of Major Components - 23 Function of Major Components The function of the major components of the LaserWriter 12/64

Principles of Operation Function of Major Components - 24 Cassette (Deck 1)Paper CassetteLeaf Spring ActuatorMicroswitchesCassette Sizing Assembly

Principles of Operation Function of Major Components - 25 Paper Transport (1 of 2) Pickup Drive Assembly The pickup drive assembly is responsible fo

Overview Paper Path - 4 Paper Path The printer has a basic S-shaped paper path and multi-purpose tray arrangement generally similar to the Laser-Wri

Principles of Operation Function of Major Components - 26 Paper Transport (1 of 2)Registration Feed RollerPaper Deflector SolenoidPaper Deflector Gu

Principles of Operation Function of Major Components - 27 Paper Transport (2 of 2) Multipurpose Frame Assembly The multipurpose frame assembly incl

Principles of Operation Function of Major Components - 28 Paper Transport (2 of 2)Manual Feed SolenoidManual FeedClutch GearManual Feed Paper-Presen

Principles of Operation Function of Major Components - 29 Fusing and Paper Exit Fuser Assembly The major parts contained within the fuser assembly i

Principles of Operation Function of Major Components - 30 Fusing and Paper ExitFuser AssemblyDelivery RollersFuser Exit ActuatorFuser Exit SensorTem

Principles of Operation Function of Major Components - 31 Drive and Xerographic For full description of the components in this section, see the “Pr

Principles of Operation Function of Major Components - 32 Drive and Xerographic (1 of 2).Mirror AssemblyLaser/Scanner AssemblyToner CartridgeSpringL

Principles of Operation Function of Major Components - 33 Drive and Xerographic (2 of 2)Attraction RollerPhotosensitiveDrumShutterCM BladeBias Charg

Principles of Operation Function of Major Components - 34 Electrical Power Supply Assembly The power supply assembly is a large multifunctional ci

Principles of Operation Function of Major Components - 35ElectricalRegistrationSensorI/O Controller BoardDC Controller BoardPowerInletPower SupplyAss

Overview Duplexer - 5 Duplexer The most unique mechanical feature you will encounter is the optional duplexer unit. The term “duplex” denotes two-s

Principles of Operation Function of Major Components - 36FrameWhen the top cover closes, the seven events described below take place.Cover Interlock

Principles of Operation Function of Major Components - 37FrameJam Release Plate LaserShutterCoverLatchFuser IdlerGear ActuationCover InterlockActuato

Principles of Operation Function of Major Components - 38General Wiring DiagramFuser AssemblyCassette SizeSensing AssemblyDC ControllerBoardI/O Board

Principles of Operation Function of Major Components - 39 PortsCommunication SwitchParallel PortLocalTalkPortEthernet Port

Service Source K Troubleshooting LaserWriter 12/640 PS

Troubleshooting About the Status Panel - 1 About the Status Panel The LaserWriter 12/640 PS has a status panel that consists of three LEDs. The stat

Troubleshooting POST (Power-On Self Test) - 2 POST (Power-On Self Test) When you switch on power, all the status panel LEDs illuminate briefly. This

Troubleshooting POST (Power-On Self Test)/Stage Failure/POST - 3 Stage Failure/POST POST extinguishes the LEDs from top to bottom as each test stage

Troubleshooting PostScript Reporting - 4 PostScript Reporting PostScript reporting starts as soon as POST is completed. Most of the time, PostScript

Troubleshooting PostScript Reporting/End-User Error Codes - 5 End-User Error CodesReady LED onPaper-Out and Paper-Jam LEDsflashDescription Explanati

Overview Sheet Feeder - 6 Sheet Feeder An optional 500-sheet feeder is available. As with the LaserWriter 16/600 PS design, the sheet feeder fits s

Troubleshooting EPOST (Extended Power-On Self Test) - 6 EPOST (Extended Power-On Self Test) EPOST behaves exactly like POST in that it checks the sa

Troubleshooting EPOST (Extended Power-On Self Test) - 7 Initiating EPOST To initiate EPOST, you must have the printer rollback test plug (P/N 922-14

Troubleshooting EPOST (Extended Power-On Self Test) - 8 Stage Failure/EPOST An EPOST error code can either illuminate solidly (for I/O controller fa

Troubleshooting EPOST (Extended Power-On Self Test)/EPOST Error Codes - 9 EPOST Error CodesAll LEDs on for a second, then off for a second, followed

Troubleshooting Cleaning the Mirror - 10 Cleaning the Mirror There is a small peach-colored square cleaner built into the mirror assembly. Slide thi

Troubleshooting Duplexer Jams - 11 Duplexer Jams The paper guide provided with the duplexer must be installed during setup. (Refer users to page 1

Troubleshooting Duplexer Jams - 12 fail to install this guide properly, jamming will frequently occur as paper enters the duplexer from the printer.

Troubleshooting Duplexer Jams - 13 If accordion-style jamming still occurs in the duplexer after proper installation of the paper guide, replace the

Troubleshooting Printing with 8.3 Driver/EPOST Error Codes - 14 Printing with 8.3 Driver For purposes of troubleshooting paper feed, you can print w

Troubleshooting Out of Paper in Multipurpose Tray - 15 Out of Paper in Multipurpose Tray If you are trying to print from the standard cassette and g

Overview Face-Up Tray - 7 Face-Up Tray The face-up tray is an option that attaches to the rear of the printer (or to the rear of the duplexer, if pr

Troubleshooting Out of Paper in Multipurpose Tray/EPOST Error Codes - 16 .Length Guidein Letter Position

Troubleshooting Multipurpose Tray Paper Jams - 17 Multipurpose Tray Paper Jams There have been a number of reported problems with the multipurpose t

Troubleshooting False Paper Jam Error with Startup Page - 18 False Paper Jam Error with Startup Page Symptom: A false paper jam error occurs when

Troubleshooting Print Quality Problems - 1 Image Quality Problems It can be easily determined whether an image quality problem is being caused by th

Troubleshooting Print Quality Problems - 2 P-1 Light Prints Step Actions and QuestionsAction(When There Is Problem) Paper conditions (moisture, war

Troubleshooting Print Quality Problems - 3 P-2 Blank Prints Step Actions and QuestionsAction(When There Is Problem) Toner cartridgeIs the problem s

Troubleshooting Print Quality Problems - 4 P-3 Black Prints Step Actions and QuestionsAction(When There Is Problem) Toner cartridgeIs the problem s

Troubleshooting Print Quality Problems - 5 P-4 Vertical Band Deletions Step Actions and QuestionsAction(When There Is Problem) Dirty reflecting mir

Troubleshooting Print Quality Problems - 6 P-5 Horizontal Band Deletions Step Actions and QuestionsAction(When There Is Problem) Paper conditions

Troubleshooting Print Quality Problems - 7 TransferIs the toner image on the drum transferred normally on the paper? * Switch off the printer power