Page 1 Maintenance Manual Volume 1 L5020 Multifunction Printer...
Page 3 L5020 Multifunction Printer Maintenance Manual Volume 1 P/N 706344–001, Rev. B...
Page 4: Operation
Properly shielded and grounded cables and connectors must be used in order to meet FCC emission limits. Printronix is not responsible for any radio or television interference caused by using other than recommended cables and connectors or by unauthorized changes or modifications to this equipment.
Page 5 Printronix, Inc. shall not be held responsible for errors contained herein or any omissions from this material or for any damages, whether direct, indirect, incidental or consequential, in connection with the furnishing, distribution, performance or use of this material.
Page 6 Ethernet is a trademark of Xerox Corporation. DuraFusion, IGP, LaserLine, LinePrinter Plus, PGL, and Printronix are registered trademarks, and PSA is a trademark of Printronix, Inc. Magnum and QMS are registered trademarks, and Code V is a trademark of Quality Micro Systems, Inc.
Page 7 Agfa Corporation. CG Times, based on Times New Roman under license from The Monotype Corporation Plc is a product of Agfa. Univers is a registered trademark of Linotype AG and/or its subsidiaries. Letraset is a registered trademark, and Aachen, Revue and University Roman are trademarks of Esselte Pendaflex Corporation.
Page 9: Table Of Contents
Volume 1 Table of Contents Introduction Printer Features ............1–2 General Safety Precautions .
Page 10 Tractor Drive ............2–32 Perforation Cutter Drive .
Page 11 Loading Flash Memory (If Equipped) ......... 3–64 The lasr2fls Utility Program .
Page 12 Motors ..............4–111 Fans .
Page 13 Volume 2 Table of Contents Scheduled Maintenance Introduction ............. . . 6–3 Maintaining Print Quality .
Page 14 Replacing the Developer ........... . 6–67 Developing Unit Removal .
Page 15 Error Code 28 – Waste Toner Full ........7–52 Error Code 29 –...
Page 16 Print Quality Problems, including Sample Printouts ......7–105 Continuous Stain (Main Charger Section) .
Page 17 Basic Operation Menu ............8–25 Fanfold Paper .
Page 18 Bracket Assembly, FU (Fuser Unit) Connector ....... . . B–42 Flash Duct Assembly .
Page 19: Introduction
Introduction Chapter Contents Printer Features ............1–2 General Safety Precautions .
Page 20: Printer Features
Printer Features The printer provides the following standard features: Non-impact/electrophotographic page printer This printer is a non-impact page printer which employs the same electrophotographic system as conventional copiers. It meets the needs of users who wish to produce high-quality prints rapidly and quietly. High performance-to-cost ratio Print speed is 20 pages per minute on continuous letter size and A4 size forms (long edge fed).
Page 21 Small size and low acoustic noise Although a flash fixing system is employed, a thorough noise reduction feature is incorporated which reduces the acoustic noise emission to a level of 60 dB (A) or less during operation, which is comparable to that of a conventional thermal roller fixing type laser printer.
Page 22: General Safety Precautions
General Safety Precautions When handling the printer, be sure to observe the following precautions to avoid accidents and ensure safe operation of the printer: Be sure to observe the warnings and instructions indicated on the printer. Do not bring combustibles near the printer. Install the printer in a well-ventilated room.
Page 23 During printer operation, the fuser section reaches high temperature. If the fuser section needs to be removed after printer operation, do not touch its metal portions until the fuser section cools sufficiently. Do not touch the xenon lamp or the cover glass of the fuser section. Be sure to close all covers during printing.
Page 24: Developing Unit
Printer Components Main Components Photoreceptor drum Exposure section Discharge (erase) LEDs Main charger LED print head (LED array) Developing section Developing unit Transfer/separation section Transfer charger Separation charger Fixing section Flash (fixing) lamp (xenon lamp) Cleaning section Precharger Cleaning unit Waste toner bottle Paper feed/paper transport section Paper tractor...
Page 25: Consumables
Consumables Fanfold Paper Toner cartridge Waste toner bottle Developer Introduction 1–7...
Page 26: Names Of Components
Names of Components External Views Top cover 3 Upper rear cover Lower rear cover Top cover 2 Top cover 1 Power paper stacker Right side cover (if equipped) Power switch Upper front cover 1 Left side cover Upper front cover 2 Lower front cover Figure 1–1 1–8...
Page 27: Fuser Unit
Controller Floppy Flash module disk power drives supply equipped) Smoke filter box NOTE: Some versions of the L5020 printer have flash memory (located on the controller PCBA). These printers have no floppy disk drives. Figure 1–2 Introduction 1–9...
Page 28: Rear View With Rear Covers Open
Rear View with Rear Covers Open Fuser unit cooling fan Drum shaft assembly Surface potential measurement board Feed motor Developer motor Drum motor Transfer elevator motor board (behind cover plate) Blower DC power supply AC power terminal box Circuit breaker lever Figure 1–3 1–10 Introduction...
Page 29: Led Print Head (Led Array)
Component Locations Top cover (1) Top cover (2) LED print head (LED array) Developing unit Transfer/ Transport unit Main charger Discharge cover (not shown) Photoreceptor drum Cleaning unit Transfer/Separator charger Precharger Fuser unit Figure 1–4 Introduction 1–11...
Page 30: Print Engine Operations And Adjustments
Setting the toner density monitoring period Setting the drum surface potential target value Setting the developing bias DC component Communication test Related Documents For additional information about printer configuration and operation, refer to the L5020 Multifunction Printer User’s Manual ( P/N 706592–001 ). 1–12 Introduction...
Page 31: Principles Of Operation
Principles of Operation Chapter Contents Principles of Operation ............2–2 Photoconduction Section .
Page 32 Principles of Operation This printer employs an electrophotographic printing process. This process consists of the following five overall steps: 1. Exposing the precharged photoconductive, photoreceptor drum surface to the print image light 2. Causing toner to adhere to the electrostatic latent image formed on the drum surface 3.
Page 33 –100 V –200 V AC 1500 Vp–p, 10.5 KHz +4.0 KV AC 11 KVp–p 1 KHz Transfer Separation Figure 2–1. The Electrophotographic Process...
Page 34: Photoconduction Section
Photoconduction Section This section eliminates residual charge from the drum surface, uniformly charges the drum surface, and executes print image exposure. Discharge In the electrophotographic system, the portions of the photoconductive, photoreceptor drum surface where exposed to light become electroconductive, and toner adheres to these portions, where the charge is neutralized (latent image formation) so that visible images are formed (developed).
Page 35 Main Charging After being electrically neutralized in the discharge step, the drum surface undergoes corona discharge so that it has a uniform positive charge. The potential generated on the drum surface is determined by the grid potential of the charger, which is grounded via a varistor, and this potential is maintained at a set point.
Page 36 Exposure The photoreceptor drum is seamless and is made of an aluminum sleeve that is coated with an Se/Te alloy photoconductive semiconductor. When this drum, which has been positively and uniformly charged in the main charging step, is exposed to light, the photosensitive film in an exposed area conducts, neutralizing the charge in the exposed area.
Page 37 electrostatic latent print image on the positively-charged drum surface (main scanning direction). NOTE: The LED array consists of individual light-emitting diodes (LEDs) that are arranged across the width of the paper path. Each individual LED corresponds to one printing pixel. The LED array converts one raster line (horizontal scanning line) of image data into a row of on-and-off light spots, which will become dots on the paper.
Page 38 In the photoconduction section, the drum potential changes as indicated in Figure 2–6. The dark area potential indicated in Figure 2–6 is monitored by the drum surface potential sensor. The current flowing to the main charger is varied in accordance with the difference between the detected potential and the desired target potential.
Page 39: Developing Section
Developing Section In the developing section, toner is attracted to the electrostatic latent image formed in the exposure step, so that a visible mirror image is formed on the drum surface. Developing Unit The developing mechanisms of this print engine are integrated into a single unit which is constructed as shown in Figure 2–7.
Page 40 Toner cartridge Toner hopper Agitator Toner supply roller Ä Ä Ä Ä Ä Agitation roller Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä Doctor blade Toner empty sensor Developing roller Toner density sensor Figure 2–7.
Page 41 Principles of Developing The developing roller consists of a rotary inner-pole magnet and a sleeve, as shown in Figure 2–8. Inner-pole magnet Sleeve Figure 2–8. Developing Roller Note that a developing bias is applied to the developing roller. The developing bias is obtained by superimposing a 1.5 kVp–p, 10.5 kHz AC bias upon a +300 V DC bias as shown in Figure 2–9.
Page 42 Therefore, when the AC bias makes the surface of the developing roller positive , the strength of the electric field resulting from the difference between that potential and the drum surface potential is greater than the magnetic force exerted between the toner and inner-pole magnet.
Page 43 On the other hand, when the AC bias makes the surface of the developing roller negative , part of the toner attracted to the drum surface is returned to the developing roller by the magnetic force exerted between the toner and inner-pole magnet and the strength of the electric field generated between the drum and developing roller (see Figure 2–11).
Page 44: Transfer/Separation Section
Transfer/Separation Section In this section, the toner image, which has been formed on the drum surface in the developing section, is transferred onto the paper supplied from the paper feed section, and then the paper is separated from the drum. Transfer The toner attracted to the photoreceptor drum surface is positively charged due to the friction with the carrier in the developing unit.
Page 45 Separation The drum surface areas to which no toner is attracted are positively charged. Therefore, the paper that is negatively charged in the transfer section has adhered to the drum and would not leave the drum if this situation is allowed to continue. Therefore, to separate the paper from the drum, corona discharge is invoked again to eliminate the charge from the paper immediately after completion of toner image transfer, using AC voltage to which positive DC bias is added.
Page 46 As shown in Figure 2–14, the transfer charger and the separation charger are integrated into a single unit together with the paper supply guide and paper transport section. They are raised and lowered by the transfer elevator motor. Paper transport section Photoreceptor drum Transport belt Paper supply guide...
Page 47: Fixing Section
Fixing Section In this section, the toner, which has been transferred onto the paper from the drum in the transfer section, is fused to the paper. Xenon lamp Paper Melted and fixed toner Unfixed toner Figure 2–15. Fixing Flash Fixing This print engine uses a xenon lamp to provide flash light (light-emitting frequency: 3.8 Hz) on the paper to fix the toner.
Page 48: Cleaning Section
Cleaning Section In this section, the photoreceptor drum surface, which still contains excess toner from the previous printing operation, is cleaned for the next printing cycle. Precharging (Precleaning Charging) After the paper is separated from the photoreceptor drum, unwanted material, such as toner, carrier, and paper dust, remains on the drum surface without being transferred onto the paper.
Page 49 Photoreceptor drum Precharger – Figure 2–16. Precharging Principles of Operation 2–19...
Page 50 Drum Cleaning The remaining material particles, which have been positively charged in the precharging step, are scraped away by a semiconductive brush, to which a negative DC bias is applied. The toner attracted to the brush then adheres to a recovery roller, to which a greater negative DC bias is applied.
Page 51: Paper Feed, Transport, And Output Sections
Paper Feed, Transport, and Output Sections The printed paper is fed, transported, and output via the mechanisms shown in Figure 2–18. Paper back-feed sensor (PBFS) Main unit feed roller Transport belt Figure 2–18. Paper Feed, Transport, and Output Sections Principles of Operation 2–21...
Page 52 Paper Detection The paper near-end sensor is used to determine whether or not paper is present. Paper Paper near-end sensor Figure 2–19. Paper Near-End Sensor 2–22 Principles of Operation...
Page 53 Paper Loading When the printing instruction (*PRNT signal) is issued from the controller, the paper on the tractor is automatically advanced upon completion of drum cleaning, and the image on the photoreceptor drum is transferred onto the paper while advancing. Photoreceptor drum Paper back-feed sensor (PBFS) Paper...
Page 54 Paper Transport When the print engine receives the printing instruction (*PRNT signal) from the controller and completes paper loading, it sends the image data request signal (*VSYNC signal) to the controller and, at the same time, begins to expose the drum to the LED array light.
Page 55 Paper Output The paper moves straight through the output roller and is output horizontally. Figure 2–22. Paper Output Paper parking When printing has been completed, the paper is transported with printed and unprinted pages joined together. Therefore, the paper transport operation is continued until the perforation at the end of the last-printed page arrives at the cutter position.
Page 56 Photoreceptor drum Paper back-feed sensor (PBFS) Cutter Paper Paper Paper output sensor 0 (EPS0) Transport belt Scuff roller assembly Tractor Transfer point Parking position Figure 2–23. Paper Parking 2–26 Principles of Operation...
Page 57: Drive System Descriptions
Drive System Descriptions Figure 2–24 shows a diagram of the printer drive system. Main unit feed motor (FMT) Figure 2–24. Printer Drive System Principles of Operation 2–27...
Page 58: Drum Drive
Drum Drive The photoreceptor drum is driven by the drum motor, which also drives the drum cleaner conductive brush and the recovery roller assembly. Figure 2–25. Drum Drive 2–28 Principles of Operation...
Page 59: Developing Roller Drive
Developing Roller Drive The developing roller consists of the inner-pole magnet roller and the sleeve roller. Two shafts are driven by the gear box at the output shaft of the developing unit driving motor. One of these two shafts drives the inner-pole magnet roller and, at the same time, the other shaft drives the sleeve roller.
Page 60: Main Unit Feed Roller Drive
Main Unit Feed Roller Drive The main unit feed motor drives the following rollers: 1. Main unit feed roller (also called the transport roller) 2. Scuff roller 3. Paper output roller (also called the output roller) Direction of paper motion Nip roller Nip roller Transport belt...
Page 61: Transfer/Separation Unit Drive
Transfer/Separation Unit Drive The transfer/separation unit moves up and down when the cam installed on the transfer elevator motor shaft rotates. Transfer elevator motor Transfer/separation unit Figure 2–28. Transfer/Separation Unit Drive Principles of Operation 2–31...
Page 62: Tractor Drive
Tractor Drive The tractor is driven by the tractor motor. The tractor motor, tractor, and gears are arranged as shown in Figure 2–29. Direction of paper motion Tractor support shaft Tractor splined shaft Figure 2–29. Tractor Drive 2–32 Principles of Operation...
Page 63: Perforation Cutter Drive
Perforation Cutter Drive The perforation cutter is a disc that is driven across the paper path by the cutter motor. While the perforation cutter is operating, the printer also energizes the cutter solenoid. When the cutter solenoid energizes, it moves the paper retainer, which presses the paper.
Page 64: Operational Sequences
Operational Sequences Upon power on, the printer performs the operations diagrammed in Figure 2–31. NOTE: The MPU is the Micro Processing Unit, the microprocessor that controls the printer mechanisms. 2–34 Principles of Operation...
Page 65 Power on MPU initialization Controller initialization Reset command sent Error found Mechanical initialization Fault state (offline) Self–diagnostic check No error found Idling state (online) Engine operation request Page received Command operation Printing state state Operation Print complete complete Error Error occurs Figure 2–31.
Page 66: Mpu Initialization
MPU Initialization Starting conditions MPU initialization starts when the printer is turned on. Description of operations 1. EPRDY (Engine Power Ready) signal assertion The print engine asserts the EPRDY signal to inform the controller that the engine is ready for communication. When this signal goes true, the controller may poll the engine status by sending the “Read Basic Status”...
Page 67 7. Transition to online If no errors occur, the printer will go online. If any errors are reported by the engine, the error message will be displayed on the control panel and the printer will go into a fault state. Principles of Operation 2–37...
Page 68: Printing Operations
Printing Operations Start conditions Printing starts when the controller asserts the *PRNT (print) signal while the print engine is in the online idling state. Description of operations The following pages describe the printing operations along with their timing diagrams. If the controller detects the occurrence of an error by receiving the basic status information returned from the print engine during printing, it stops the printing operation, identifies the error condition by reading the error status information, and causes the descriptive error information to be displayed by the operation panel...
Page 69 the main-charged drum surface area arrives at the proximity of the developing roller. e. Cleaning terminates when the drum makes another revolution. The main unit feed motor, vacuum fan motor, and power paper stacker (if equipped) also start operations when the *PRNT signal is received from the controller.
Page 70 8. *LSCA (page last raster) signal assertion When the last raster of each page begins to be scanned, the *LSCA signal is asserted to inform the controller of the scanning of the last raster. At this time a check is performed to see whether the *PRNT signal is asserted by the controller. If such *PRNT signal assertion is done, the *VSYNC signal for the next page is asserted.
Page 71 15. Tractor reversal When the paper is cut, the tractor reverses to return the leading end of unprinted pages to the parking position which is immediately in front of the paper back-feed sensor (see Figure 2–32). 16. Drum cleaning (post-printing) In this step, the following routine is executed (see Figure 2–32 and Figure 2–35): a.
Page 72 Main unit feed motor Figure 2–32. Printing Timing Diagram...
Page 73 Figure 2–33. Drum Cleaning Timing Diagram (During Mechanism Initialization)
Page 74 Figure 2–34. Preprinting Drum Cleaning Timing Diagram...
Page 75 Figure 2–35. Postprinting Drum Cleaning Timing Diagram...
Page 76 Paper back-feed sensor Figure 2–36. Paper Loading Timing Diagram...
Page 77 Eject paper NOTE: The print engine ignores the commands for this operation unless the paper back-feed sensor detects paper. 1. Checks whether any paper remains. Activates the tractor motor, monitors the sensor output, and checks whether any paper remains in the transport paper path. If paper remains, proceeds to the next step.
Page 78 10. Terminates the main unit feed motor (see Figure 2–37). 11. Makes the transition to the online idling state (not illustrated in Figure 2–37). 12. Vacuum fan is stopped along with the fuser cooling blower 300 seconds after step 8. 2–48 Principles of Operation...
Page 79 Main unit feed motor Figure 2–37. Eject Paper Timing Diagram...
Page 80 Main unit feed motor Howeverr, no waiting will be performed if the power folder unit is not used. Figure 2–38. Eject All Paper Timing Diagram...
Page 81 Park paper NOTE: The print engine ignores the commands for this operation unless the paper back-feed sensor detects paper. 1. Checks whether any paper remains. Activates the tractor motor, monitors the sensor output, and checks whether any paper remains in the transport paper path. If paper remains, executes steps 2 through 8 of the preceding section, “Eject paper.”...
Page 82 Main unit feed motor Figure 2–39. Park Paper Timing Diagram...
Page 83 Feed paper 1/2 inch (12.7 mm) NOTE: The print engine ignores the commands for this operation unless the paper back-feed sensor detects paper. 1. Turns on the transfer/transport unit. Activates the main unit feed motor (high-speed side) and vacuum fan (see Figure 2–40).
Page 84 Main unit feed motor Figure 2–40. Feed Paper 1/2 Inch (12.7 mm) Timing Diagram...
Page 85 Feed one page NOTE: The print engine ignores the commands for this operation unless the paper back-feed sensor detects paper. 1. Turns on the transfer/transport unit. Activates the main unit feed motor (high-speed side) and vacuum fan (see Figure 2–41). 2.
Page 86 Main unit feed motor Figure 2–41. Feed One Page Timing Diagram...
Page 87 Supply toner 1. Activates the developing motor. 2. Turns on the toner supply clutch. This causes the toner supply roller and the intermediate gear (driven by the developing motor) to engage, thereby rotating the toner supply roller and supplying toner to the agitation chamber. 3.
Page 88 2–58 Principles of Operation...
Page 89: Electrical System And Adjustments
Electrical System and Adjustments Chapter Contents Printer Block Diagram ............3–3 Sensors and Actuators .
Page 90 Setting the MPU Board Rotary Switches ........3–61 Adjusting the Flash Power Supply .
Page 91: Printer Block Diagram
Printer Block Diagram A block diagram of the printer is shown in Figure 3–1. Power Paper Stacker (optional) Print Head 9600 BPS Serial 3.072 MHz Serial Motors, Chargers, High-voltage Clutches, Developing Unit, (Corona) Solenoids, Cleaning Unit, Power Supply etc. and Transfer Unit Sensors MPU–PCBA Actuators...
Page 92: Sensors And Actuators
Sensors and Actuators Figure 3–2, on pages 3–4 and 3–5, shows the sensors and actuators connected to the MPU board. (Items marked with * are optional.) *Power paper stacker 1. Limit switch that detects whether the scuff roller is holding paper. Figure 3–2.
Page 93 1. Limit switch that detects whether the cleaning unit and waste toner bottle are seated. 2. Reed switch that detects whether the front cover is closed. Figure 3–2. Sensors and Actuators (Continued) Electrical System and Adjustments 3–5...
Page 94: Input / Output Signals
Input / Output Signals A block diagram of the input/output signals is shown in Figure 3–3. 3–6 Electrical System and Adjustments...
Page 95 PS–PCBA MPU–PCBA Electrical System and Adjustments 3–7...
Page 96: Unit Interface
Unit Interface The interface between the main areas of the printer and the MPU board is described in the following sections. LED Array Connection The LED array (LED print head) is connected to the MPU board head driver and LED drive power supply (main power supply) as shown in Figure 3–4.
Page 97 Interface signals The following signals are sent and received between the head driver and LED array: Table 3–1. LED Array Interface Signals Signal Abbreviation Head driver LED array Clock CLOCK Data 1 DATA 1 Data 2 DATA 2 Data 3 DATA 3 Data 4 DATA 4...
Page 98 Data shift direction LED array LED array LED array LED array block block block block IC13 IC25 IC37 Data 1 Data 2 Data 3 Data 4 Figure 3–5. LED Array Data Block Diagram The number of dots used for illumination data transmission are as follows: For 400 dots per 25.4 mm (400 dpi) (Total number of emitters 5888): Table 3–2.
Page 99 For 240 dots per 25.4 mm (240 dpi) (Total number of emitters 3520): Table 3–4. Number of Dots, 240 dpi Signal Number of dots Data 1 896 dots Data 2 896 dots Data 3 896 dots Data 4 832 dots Load The load signal stores the shift register data inside the LED array into a latch register.
Page 100 LED drive power supply + This is the positive side of the LED drive power supply. It is not connected to the logic power supply positive side. LED drive power supply - This is the negative side of the LED drive power supply. It is not connected to the logic power supply negative side.
Page 101 Signal pin assignments Interface signals are assigned to the pins of the MPU board connector (CN2) and the LED array connector (CN1), as follows: Table 3–6. LED Array Pin Assignments (CN1) Pin No. Signal Pin No. Signal DATA1 (–) DATA1 (+) DATA2 (–) DATA2 (+) DATA3 (–)
Page 102 Table 3–8. LED Array Pin Assignments (CN3) Pin No. Signal V DD V DD V DD 3–14 Electrical System and Adjustments...
Page 103: Flash Power Supply
Flash Power Supply Connection The flash power supply is connected to the MPU board as shown in Figure 3–7 below: AC in from power mains Circuit breaker Noise filter Noise filter Power supply input terminals DC power supply MPU board Flash power supply Figure 3–7.
Page 104 Interface signals The following signals are sent and received between the MPU board and the flash power supply: Table 3–9. Flash Power Supply Interface Signals Signal Abbreviation MPU board Flash power supply Charge *CHON Flash Reset *RESET Alarm ALARM Charge status *CHOK Logic power supply + Logic power supply -...
Page 105 The relationship between the Charge signal, Flash signal, and the flash capacitor charge voltage is as follows: Charge signal (*CHON) Flash signal (TRG) Charge voltage Where: Flash period (or flash duration) = 263 ms) (Flash frequency f = 1/T = 1/263 ms = 3.8 Hz) Charge duration (253 ms min.) Charge inhibited duration (10 ms min.) Flash warning duration (0 ms min.
Page 106 When an abnormality occurs within the flash power supply, the supply asserts the Alarm signal. (The voltage goes high between the collector and the emitter of the interface circuit driver transistor for the Alarm signal.) Any of the following abnormalities will cause the alarm signal to be asserted: Abnormality in charge voltage Abnormality in temperature/temperature of resistor for discharge Flash error...
Page 107 Interface circuits The following circuits are used for transmitting and receiving control signals (*CHON, TRG, *RESET) and alarm signals (ALARM, *CHOK). SN75451B MPU board side Flash power supply side Figure 3–9. Flash Power Supply Interface Circuit (Control Signals) MPU board side Flash power supply side Figure 3–10.
Page 108 Signal pin assignments Interface signals are assigned to the pins of the MPU board connector (CN3) and the flash power supply interface connector as follows: Table 3–10. Flash Power Supply Pin Assignments (CN3) Pin No. Signal (+5V) (+5V) *CHON *RESET ALARM (GND) *CHOK...
Page 109 The following signals from the trigger output terminals on the flash power supply drive the trigger coil: Table 3–12. Flash Power Supply Pin Assignments (Trigger Output) Terminal No. Signal Electrical System and Adjustments 3–21...
Page 110: Developing Unit
Developing Unit Connection The developing unit is connected to the MPU board and to the high-voltage power supply as shown in Figure 3–11 below: High-voltage MPU board power supply Signal and power supply connector Developing unit Figure 3–11. Developing Unit Connections 3–22 Electrical System and Adjustments...
Page 111 Interface signals The following signals are sent and received between the MPU board or high-voltage power supply and developing unit: Table 3–13. Developing Unit Interface Signals Signal Abbreviation MPU board Developing unit Toner supply roller drive TSMO Toner density insufficient TDSD Density analog output TDSI...
Page 112 No toner detected (TESI) This signal indicates that the toner level in the toner hopper has dropped below the level of the piezoelectric vibrator element of the toner empty sensor. Developing bias voltage (DB) This is the developing bias voltage applied to the developing roller. Drive power supply + (VDD) This is the positive side of the actuator drive power supply.
Page 113 Interface circuits The developing unit has two sensors, the toner density sensor and the toner empty sensor. The developing unit also includes the toner supply clutch. In addition, the developing unit applies an AC bias voltage (from the high-voltage power supply) to the developing roller.
Page 114 The threshold level of toner density detection of this sensor is set at 11% in the following circuit: +24V +24V 5.1K TDSC 5.1K 0.01 F MPU board side Developing unit side Figure 3–13. Toner Density Threshold Circuit Toner empty sensor circuit This sensor directly outputs the oscillation output (TESI) of the piezoelectric vibrator element, and determines whether or not toner exists by its peak-to-peak (P–P) output voltage.
Page 115 Because this output voltage cannot directly drive later logic circuits, it is first converted into logic levels by a circuit consisting of a rectifier followed by a comparator: 4.7K 0.1 F 5.1K 0.01 F 1S6126 4.7K TESI PC339 0.1 F 2SC1815 1S5196 100K...
Page 116 Toner supply clutch circuit The toner supply clutch is driven by the TSM signal generated from the gate array, through the following circuit, on the basis of the output signal of the toner density sensor (TDSD). TSMO TSMO 2SC2120 LS540 MPU board side Developing unit side Figure 3–16.
Page 117 Signal pin assignments Interface signals are assigned to the pins of the developing unit connector and to the MPU board connector (CN6) as follows: Table 3–14. Developing Unit Pin Assignments (Developing Unit Connector) Pin No. Signal TDSI TDSC TSMO (S24V) TDSD TESI (S24V)
Page 118: High-Voltage (Corona) Power Supply
High-voltage (Corona) Power Supply Connection The high-voltage power supply is connected to the MPU board, the main power supply, and the various areas of the printer that require high voltage, as shown in Figure 3–17. 3–30 Electrical System and Adjustments...
Page 119 –V2 Drum cleaner (semiconducting brush) –V1 Drum cleaner (recovery roller) Developing unit High-voltage (corona) Separation charger power supply –HV Transfer charger +HV2 Precharger +HV1 Main charger MPU board Figure 3–17. High-voltage (Corona) Power Supply Connections Electrical System and Adjustments 3–31...
Page 120 Interface signals The following signals are sent and received between the MPU board and the high-voltage power supply: Table 3–16. High-voltage (Corona) Power Supply Interface Signals High-voltage Signal Abbreviation power supply Main charger remote ON/OFF +HV1 REM Main charge current control +HV1 CONT Precharger remote ON/OFF +HV2 REM...
Page 121 Transfer charger remote ON/OFF This signal turns on or off the constant current sent to the transfer charger. The magnitude of this current can be varied between 100 µA and 300 µA, by a variable resistor (B type). (The factory setting is 300 µA.) Separator charger remote ON/OFF This signal turns on or off the voltage supplied to the separator charger.
Page 122 Signal system ground This is the reference for the remote control signals mentioned above. Drive power supply This is the +24 V drive power supply. Drive system ground This is the reference for the drive power supply signals mentioned above. Interface circuits The above-mentioned remote ON/OFF signals, control signals, and alarm signal are sent and received via the following circuits.
Page 123 Control Circuit (+HVCONT, DRLCONT interface circuit) 8-bit control data is converted to analog signal, amplified to a range of 0 to +12 V by an operational amplifier, and output. Then the DC component of the main charger current and developing bias voltage are controlled within the respective output value ranges according to this voltage.
Page 124 Alarm circuit Because the alarm signal from the high-voltage power supply is an open collector output, it is pulled up to +5 V by a 4.7 KΩ resistor. 4.7K HVARM HV–UN ALM MPU board side High-voltage power supply side Figure 3–20. Alarm Interface Circuit 3–36 Electrical System and Adjustments...
Page 125 Signal pin assignments The interface signals are assigned as follows to the pins of the MPU board connector (CN5) and the interface connector of the high-voltage power supply: Table 3–17. High-voltage Power Supply Pin Assignments (MPU Board Connector CN5) Pin No. Signal +24V +HV1 REM...
Page 126: Explanation Of Circuits According To Function
Explanation of Circuits According to Function The following pages provide an introduction to the main electrical circuits of the printer. Drum Surface Potential Control Circuit The drum surface potential is converted to 8-bit data by the analog-to-digital converter (ADC) and the drum surface potential sensor. Meanwhile, the target surface potential is set as 8-bit data by the surface potential setting command from the controller, and stored in the data memory of the MPU board.
Page 127 Main charger +HV1 (+100 to +1000 A) High-voltage power supply Drum surface potential sensor +HV1 CONT +HV1 (0 to +12 V) Surface potential measurement circuit Current control circuit Absolute Operational value Operational amplifier circuit amplifier DSPS board Control data (1 byte) Gate array Measurement data (1 byte)
Page 128: Developing Bias Control Circuit
Developing Bias Control Circuit The bias voltage that is applied to the developing roller is controlled according to the potential (8-bit data) set point by the developing bias potential setting command from the controller. When drum cleaning begins during the mechanism initialization process or when printing begins, the 8-bit data that indicates the target potential is read into the CPU from the data memory of the MPU board and sent to the developing bias control circuit.
Page 129 DC bias (+200 to +600 VDC) plus AC bias (1000 to 2000 V at 10.5 KHz) High-voltage power supply Developing roller DRL CONT DRL REM (0 to +12 V) Developing bias control circuit Operational Gate array amplifier Control data (1 byte) Data memory MPU board Command to set the developing bias potential...
Page 130: Toner Density Control Circuit
Toner Density Control Circuit The toner density is controlled by the output voltage of the toner density sensor. When the toner density in the vicinity of the toner density sensor drops below 11%, the output signal (TDSO) from the toner density sensor goes low, the toner supply roller drive signal (TSMO) is output from the gate array, and the toner supply clutch is engaged for 1 second.
Page 131 Toner empty sensor Toner supply clutch and roller Toner density sensor TDSD TSMO TESI Toner density Toner supply Rectifying sensor circuit clutch drive circuit circuit Signal Gate array conversion (digital) MPU board Data memory Command to supply toner Command to set the toner density monitoring cycle (includes full dot count number) Controller Figure 3–23.
Page 132: Drum Motor Control Circuit
Drum Motor Control Circuit The drum motor drives the cleaning unit and the photoreceptor drum. Since the drum is central to the printing cycle, stable rotation is required of the motor. A brushless DC motor with a built-in phase-locked loop (PLL) circuit is employed to maintain the rotation speed at high accuracy (motor rotation speed: 1000 rpm).
Page 133 Drum motor Drum motor encoder (80 pulses) DRMP DRMN Drum motor control circuit PLL circuit Control output (0 to +8 V) Sensor Driver Frequency interface circuit detector (Lock center = +4 V) Frequency Crystal dividing oscillator circuit DMON1 DMARM0 Gate array MPU board DRMP: Positive side of drum motor drive power supply (+24 V)
Page 134: Drum Counter Circuit
Drum Counter Circuit A drum count encoder is located at the end of the drum axis (inside the printer rear panel). The counter circuit is shown in Figure 3–25. This circuit is arranged such that the drum counter is increased by input pulses from the encoder (1 pulse per 1 drum rotation) whenever the count enable (Count–EN) signal is valid.
Page 135: Tractor Motor Control Circuit
Tractor Motor Control Circuit The tractor motor controls the transport of fanfold paper and determines print accuracy. Since the CPU must therefore constantly control the operation of this motor along with the printing process, a stepping motor for driving the tractor is driven by clock pulses generated by the CPU (driving frequency: 3333.333 Hz).
Page 136: Main Unit Feed Motor Control Circuit
Main Unit Feed Motor Control Circuit The main unit feed motor drives the transmission shaft that rotates the transfer belt. It pulls the paper, which is sent at the speed controlled by the tractor motor or drum motor. Since paper tends to go slack near the perforation, the rotation is set about 5% faster than that of the tractor motor or drum motor.
Page 137: Transfer Elevator Motor Control Circuit
Transfer Elevator Motor Control Circuit The transfer elevator motor is controlled by the circuit shown in Figure 3–28. When the transfer guide is to be raised After being set (in direction) to Up, the motor is driven by the START signal. When the upper limit is detected, the TUPOS signal changes and the driving transistor is turned off, simultaneously causing the motor to be grounded at both ends and to be braked by short-circuiting.
Page 138 TUUL (ON: At upper limit position) +24V TULL (ON: Not at upper limit position) TUPOS (L: UP H: STOP) Driving transistor UP/DOWN (L: UP H: DOWN) START/STOP Motor (L: START H: STOP) Upper/Lower limit sensor TUPOS Figure 3–28. Transfer Elevator Motor Control Circuit...
Page 139: Cutter Motor Control Circuit
Cutter Motor Control Circuit As shown in Figure 3–29, the cutter motor control circuit has an H-bridge configuration. Each vertical leg of the H-bridge is composed of one PNP and one NPN transistor, as shown in Figure 3–29. If CPS0 = 1 when ON/OFF = 1, and F/R (forward/reverse) = 1, Q and Q turn on, and the motor rotates forward.
Page 140 Cutter position sensor 0 CPS0 +24V Fuse 4.7K 4.7K ON/OFF Forward 4.7K Reverse 4.7K Cutter position sensor 1 CPS1 Gate array Figure 3–29. Cutter Motor Control Circuit 3–52 Electrical System and Adjustments...
Page 141: Adjustments
Adjustments The figures on the following pages show the locations of the switches, test points, variable resistors, fuses, and connectors on the MPU board. Following the MPU board figures are procedures for adjusting the eraser lamp input voltage, adjusting the toner density sensor, setting the MPU board rotary switches, and adjusting the flash power supply.
Page 142: Mpu Board Switches
MPU Board Switches NOTE: Switch SW3 is reserved for future use. Figure 3–30. MPU Board Switch Locations 3–54 Electrical System and Adjustments...
Page 143: Mpu Board Test Points
MPU Board Test Points TP13 Figure 3–31. MPU Board Test Point Locations Electrical System and Adjustments 3–55...
Page 144: Mpu Board Variable Resistors
MPU Board Variable Resistors NOTE: Variable resistors VR1 and VR3 are unused. Figure 3–32. MPU Board Variable Resistor Locations 3–56 Electrical System and Adjustments...
Page 145: Mpu Board Fuses
MPU Board Fuses Table 3–18 below lists each fuse on the MPU board, its current rating, and the circuit that it protects. The illustration following the table, on page 3–58, shows the locations of the fuses on the MPU board. Table 3–18.
Page 146 Figure 3–33. MPU Board Fuse Locations 3–58 Electrical System and Adjustments...
Page 147: Mpu Board Connectors
MPU Board Connectors CN11 CN10 Figure 3–34. MPU Board Connector Locations Electrical System and Adjustments 3–59...
Page 148: Adjusting The Eraser Lamp Input Voltage
Adjusting the Eraser Lamp Input Voltage 1. On the MPU board, connect the negative lead of a digital multimeter to the GND of TP5 and the positive lead to TP13. 2. On the engine checker menus, select “Volume Adjust” “Eraser Lamp” “Light”.
Page 149: Setting The Mpu Board Rotary Switches
Setting the MPU Board Rotary Switches NOTE: Switch SW3 on the MPU board is reserved for future use. Mode setting The operating mode of the printer can be changed by changing the setting of rotary switch SW1. 0: Normal Operating Position E: Engine Self-Test Position 1: Engine Checker (“Test Print”...
Page 150 Print density setting (LED print head setting) The print density setting can be changed by changing the setting of rotary switch SW2. 0: 240 DPI 1: 300 DPI 3: 400 DPI Figure 3–36. MPU Board Rotary Switch SW2 3–62 Electrical System and Adjustments...
Page 151: Adjusting The Flash Power Supply
Adjusting the Flash Power Supply Turn V.ADJ of the flash power supply and set to the desired voltage (normally set to 1700 V). NOTE: This adjustment does not require the engine checker. Flash Power Supply 1800 1880 V. ADJ 1700 1620 Figure 3–37.
Page 152: Loading Flash Memory (If Equipped)
Loading Flash Memory (If Equipped) Printers not equipped with diskette drives have flash memory. The flash memory is contained on a flash memory card located on the controller PCBA. Figure 3–38 shows how the 8 MB of flash memory is partitioned into two 4 MB partitions. Each partition can store the emulation and other software for one virtual printer.
Page 153: The Lasr2Fls Utility Program
The customer needs different emulation software You have replaced the controller board You have added or replaced the flash memory card The customer needs to load logos, forms, TIFF files, setup files, and/or font files to the printer Emulation software and fonts are supplied on 3.5 inch, double-density diskettes. Each emulation file is “executable”—you will expand it and copy it into the printer’s flash memory with a single command.
Page 154 4. To display a brief help message, at the DOS prompt, enter the command name lasr2fls with no parameters: lasr2fls <Return> You will then see a help message similar to the following: L50XX Laser Printer Flash File Conversion Utility, Vx.xx, mm/dd/yy USAGE: lasr2fls file_name1 file_name2 file_name3 A <return>...
Page 155 downloadable file that can be copied and downloaded to the printer, as detailed later in this section. The utility takes the filename you specify for file_name3 and stores this information within the downloadable output file (file_name2). The file_name3 file name is used only to determine the file name to display on the printer front panel menus.
Page 156 9. To convert other kinds of files (a logo or form file, for example), enter the following at the DOS prompt, for example: lasr2fls my_logo.xxx my_logo.dwn my_logo.xxx A <Return> where my_logo.xxx is the name of one of the form or logo files you want to convert.
Page 157: Downloading Into Flash Memory
Downloading into Flash Memory CAUTION When downloading an emulation to a virtual printer, all other optional font files, customer-supplied logos, and setup files will be erased. You will then need to reload these files. Before starting a download procedure, be sure that you have all of the necessary installation files on hand.
Page 158 8. If the printer’s parallel data cable is connected to the parallel port of an IBM or IBM-compatible computer using the PC-DOS or MS-DOS operating system, skip to step 14. If not, continue with step 9. 9. Unplug the printer AC power plug from its electrical outlet. 10.
Page 159 22. Make the diskette drive the active drive by typing the following at the DOS prompt: A: <Return> (If the diskette is in drive B, type B: <Return>) 23. Get the name of the emulation file on the diskette by listing the contents of the diskette;...
Page 160 27. Wait until the new program has successfully loaded into printer memory. 28. If you have another emulation to install, go back to step 17. 29. If you have any additional software to install (logo, form, TIFF, setup, or font files), continue with step 30.
Page 161 38. Download the files to the printer by using the DOS copy command. You can download the files one at a time by entering one file name per DOS copy command. Alternatively, you can copy multiple files in one copy command. To download one file at a time, enter the following at the DOS prompt, for example: copy /b file_name.dwn LPT1 <Return>...
Page 162 49. Plug the printer AC power plug into its electrical outlet. 50. Using the configuration printouts you made in step 3 and step 6, restore the printer configuration(s). (Refer to the User’s Manual .) 3–74 Electrical System and Adjustments...
Page 163: Replacement Procedures
Replacement Procedures Chapter Contents Covers ..............4–4 Front and Rear Covers .
Page 164 Cooling Fan (in Controller Module) ........4–102 Floppy Disk Drives (not used on printers with flash memory) .
Page 165 This chapter describes the mechanical structure of the printer and the methods and procedures for removing its various parts. WARNING For safety, before removing parts from the printer, be sure to turn off the printer and disconnect it from the AC mains. Do not operate the printer with parts removed except when performing inspection, adjustment, or other work that is specifically designated in this manual.
Page 166: Covers
Covers The mechanical and electrical systems of the printer are protected by ten covers, as shown in Figure 4–1. Top cover 3 Upper rear cover Lower rear cover Top cover 2 Top cover 1 Right side cover Upper front cover 1 Left side cover Upper front cover 2 Lower front cover...
Page 167: Front And Rear Covers
Front and Rear Covers The front and rear covers do not need to be removed for most maintenance work. Thus, only the methods of opening the covers are described. Upper Front Covers Each upper front cover can be opened easily by grasping the handle below the cover and pulling the handle toward you.
Page 168: Lower Front Cover
Lower Front Cover 1. Insert the key into the lower front cover keyhole and turn the key to the right. 2. Press the upper side of the rectangular plate below the lower front cover keyhole and pull out the lever. Pull the lever toward you to open the cover. Figure 4–3.
Page 169: Upper Rear Cover
Upper Rear Cover 1. Remove the screws (5) that secure the upper rear cover. 2. Put your hand in the handle below the upper rear cover and pull the handle toward you to open the cover. Screws (5) Screws (2) Upper rear cover Lower rear cover Figure 4–4.
Page 170: Behind The Front Covers
Smoke filter box NOTE: Some versions of the L5020 printer have flash memory (located on the controller board). These printers have no floppy disk drives. Figure 4–5. Behind the Front Covers 4–8 Replacement Procedures...
Page 171: Waste Toner Recovery Unit
Waste Toner Recovery Unit The waste toner recovery unit contains a bottle that collects waste toner carried from the cleaning unit via a screw conveyer. The waste toner bottle full sensor (WTBF) detects whether the bottle is full. The WTBF sensor consists of a light receptor and a light emitter that are attached to the left and right sides of the neck of the bottle.
Page 172 Waste toner bottle The waste toner recovery unit (containing the waste toner bottle) is located behind the upper front covers, as shown in the previous figure. When the “WASTE TONER FULL” message appears on the control panel, replace the waste toner bottle by performing the following steps, and discard the empty bottle.
Page 173 2. Press down on the opening latch and swing open the waste toner recovery unit door. Opening latch Waste toner recovery unit door Figure 4–8 3. Remove the cap from the outside of the waste toner bottle, and cap the bottle. Waste Toner Bottle...
Page 174 4. Remove the waste toner bottle from the waste toner recovery unit. 5. Discard the old waste toner bottle. 6. Install a new waste toner bottle. 7. Close the printer upper front covers. 4–12 Replacement Procedures...
Page 175 Waste toner bottle full sensor (WTBF) 1. Remove the waste toner bottle from the waste toner recovery unit (see page 4–10). 2. Refer to the following figure and remove the screw (1) securing the metal cover over the light emitter board, then remove the cover. Screw (1) (step 2) Light...
Page 176 3. Refer to the previous figure and disconnect the harness connector from the light emitter board. 4. Remove the screws (2) and spacers (4) securing the light emitter board, then remove the board. 5. Remove the screw (1) securing the metal cover over the light receptor board, then remove the cover.
Page 177 Waste toner bottle set sensor (WTBS) 1. Remove the waste toner bottle from the waste toner recovery unit (see page 4–10). 2. Refer to the following figure and remove the screws (2) securing the metal microswitch cover to the waste toner recovery unit. Waste toner recovery unit Screws (2) (step 2)
Page 178 3. Refer to the previous figure and remove the screws (2), washers (2), and nuts (2) securing the microswitch to the microswitch cover. 4. Disconnect the harness connector from the microswitch, then remove the microswitch. 4–16 Replacement Procedures...
Page 179 Waste toner recovery unit 1. Remove the waste toner bottle from the waste toner recovery unit (see page 4–10). 2. Refer to the following figure and disconnect the harness connectors (3) from their mating connectors on the printer. Waste toner recovery unit Hinge Spring Harness...
Page 180 3. Refer to the previous figure and detach the end of the spring that is attached to the waste toner recovery unit. 4. Remove the waste toner recovery unit by lifting it off of the hinge. 4–18 Replacement Procedures...
Page 181: Developing Unit
Developing Unit CAUTION The developing unit should be removed only by an individual who has received the appropriate training. Be careful not to damage the sensors while cleaning the developing unit. Developing unit removal 1. Turn the printer power switch OFF. 2.
Page 182 3. Press down on the opening latch and swing open the waste toner recovery unit door. Opening latch Waste toner recovery unit door Figure 4–14 4–20 Replacement Procedures...
Page 183 CAUTION Failure to perform step 4 damages the photoreceptor drum. 4. Rotate the developing unit lever fully clockwise so that it is pointing straight up (to separate the developing unit from the photoreceptor drum). Lever Figure 4–15 Replacement Procedures 4–21...
Page 184 5. Hold the lever in one hand and pull the developing unit partially out of the printer. Hanger Developing Unit Lever Figure 4–16 6. With your other hand, grasp the hanger, rotate the hanger to the left until it is upright, then remove the developing unit from the printer.
Page 185 10. Remove the screws (3) securing the developing unit cover, and remove the cover. Developing unit Screws (3) Cover Figure 4–17 11. Locate a new developer bottle. 12. Shake the developer bottle several times, remove the bottle cap, and screw the nozzle tightly onto the bottle.
Page 186 13. While rotating the developing roller knob counterclockwise, evenly pour the entire bottle of developer powder into the developing unit. Developer bottle Developing roller knob Figure 4–18 14. Replace the developing unit cover and tighten the three screws. IMPORTANT If toner or developer spills on clothing, use cold water to remove it. 4–24 Replacement Procedures...
Page 187 Developing unit installation CAUTION Failure to perform step 15 damages the photoreceptor drum. 15. On the developing unit, rotate the lever fully clockwise so that it is pointing straight up. Guide Rail Hanger Lever Figure 4–19 16. Holding the lever in one hand and the hanger in the other hand, insert the developing unit on the guide rail.
Page 188 17. Rotate the hanger to the right so that it rests against the developing unit, and push the developing unit in. Hanger (rotated down) Figure 4–20 4–26 Replacement Procedures...
Page 189 18. Rotate the developing roller knob counterclockwise until the unit drops into its final resting position. The positioning pin should protrude through the main body of the developing unit. Positioning pin Developing roller knob Figure 4–21 Replacement Procedures 4–27...
Page 190 19. Rotate the developing unit lever fully counterclockwise to lock the developing unit in place. Lever Figure 4–22 20. Close the waste toner recovery unit and ensure that it latches. Opening latch Waste toner recovery unit door Figure 4–23 21. Close the printer upper front covers. 4–28 Replacement Procedures...
Page 191: Toner Cartridge
Toner Cartridge When the toner empty sensor TES detects the “toner empty” condition, follow the procedure below to replace the toner cartridge. (You need not remove the developing unit from the printer to replace the toner cartridge.) NOTE: When replacing the toner cartridge, it is recommended that the old cartridge be placed on a disposable wrapper (e.g., a plastic bag, paper towels, newspaper) to minimize toner spillage.
Page 192: Toner Cartridge
2. Rotate the old toner cartridge counterclockwise until the notch is aligned with the positioning pin in the toner hopper, and remove the cartridge. Place the cartridge on the disposable wrapper. Toner cartridge Notch Positioning pin Figure 4–25 3. Put the old cartridge into a plastic bag and discard it. 4–30 Replacement Procedures...
Page 193 4. Keep the new toner cartridge in its package. Holding it level, shake it back and forth three or four times as shown by the arrows in the following figure. This loosens the toner in the cartridge. Toner Cartridge Figure 4–26 5.
Page 194 6. With the cover tape facing up, begin inserting the cartridge into the toner hopper, and slowly pull off the cover tape in the direction of the arrow. Remove the last of the tape just as the cartridge is completely inside the hopper. Positioning pin Toner Hopper Cover Tape...
Page 195 8. Rotate the cartridge clockwise until it stops. Toner Cartridge Figure 4–28 9. If any toner has spilled, remove it with wet tissue paper or a toner vacuum. 10. Close the printer upper front covers. Replacement Procedures 4–33...
Page 196: Photoreceptor Drum
Photoreceptor Drum Drum life is dependent upon media used and proper maintenance and operation of the printer. Print media other than bond paper (e.g., labels, card stock, plastic, or vinyl) may reduce drum life as much as 50%. To replace the drum, you will need a drum auxiliary rod (listed on page B–82). Please read all steps before beginning the replacement procedure.
Page 197 Follow the procedure below to replace the photoreceptor drum: 1. Turn the printer power switch OFF. 2. Open the printer upper front covers. Upper front covers Figure 4–29 Replacement Procedures 4–35...
Page 198 3. Press down on the opening latch and swing open the waste toner recovery unit door. Opening latch Waste toner recovery unit door Figure 4–30 4–36 Replacement Procedures...
Page 199 CAUTION Failure to perform Step 4 damages the photoreceptor drum. 4. Rotate the developing unit lever fully clockwise so that it is pointing straight up (to separate the developing unit from the photoreceptor drum). Lever Figure 4–31 Replacement Procedures 4–37...
Page 200 5. Hold the lever in one hand and pull the developing unit partially out of the printer. Hanger Developing Unit Lever Figure 4–32 6. With your other hand, grasp the hanger, rotate the hanger to the left until it is upright, then remove the developing unit from the printer.
Page 201 CAUTION The transfer charger must be in the down position to avoid scratching the drum. Failure to perform steps 8 and 9 damages the drum. 8. Check that the transfer charger (TCH) is in its down position. If it is not, move it to the down position by rotating the transfer elevator drive shaft counterclockwise with a screwdriver, as shown in the following figure.
Page 202 Transfer charger Transfer elevator drive shaft Figure 4–33 4–40 Replacement Procedures...
Page 203 9. Lower the transport unit by turning the green lever on the transport unit to the left. Green Lever Figure 4–34 Replacement Procedures 4–41...
Page 204 10. Loosen the thumbscrews (3) securing the drum plate and remove the drum plate. Drum plate Thumbscrews (3) Figure 4–35 4–42 Replacement Procedures...
Page 205 11. Remove the nut from the end of the drum shaft. Figure 4–36 Replacement Procedures 4–43...
Page 206 12. Screw the drum auxiliary rod onto the drum shaft. Drum shaft Drum auxiliary rod Figure 4–37 4–44 Replacement Procedures...
Page 207 13. Carefully pull the old drum outward along the drum auxiliary rod. Hold the front and back ends when the drum is nearly out of the printer, and remove it with both hands. CAUTION Avoid touching the surface of the drum with your hands, which reduces the life of the drum.
Page 208 14. Pack the old drum for shipment using its original packaging material, and close the cover of the box. 15. Wipe the drum shaft clean with a cloth. 16. Remove the new photoreceptor drum from its package. Do not discard the packaging material, as it will be needed for future drum disposal.
Page 209 20. Reinstall the nut on the end of the drum shaft and tighten the nut securely by hand. 21. Reinstall the drum plate and tighten the thumbscrews. While installing the drum plate, place your thumb over the copper grounding clip and hold the grounding clip in place.
Page 210: Proper Disposal Of A Drum Unit
Proper Disposal of a Drum Unit Due to the nature of the material used in drum manufacturing, federal regulations prohibit inappropriate disposal of laser print drums. Dispose of used drums by shipping them to one of the following: Within U.S.A. U.S.
Page 211: Drum Peripheral Equipment
Drum Peripheral Equipment The items listed below are located around the photoreceptor drum. Items followed by an asterisk (*) are removed from under the top cover. Note that the main charger, precharger, and the transfer/separator charger can be removed without removing the drum plate. Main charger (MCH) Precharger (PCH) Transfer/separator charger (TCH/SCH)
Page 212 Main charger thumbscrew Transfer/separator charger thumbscrew Precharger thumbscrew Figure 4–39 4–50 Replacement Procedures...
Page 213 Discharge LED (Erase LEDs) (PEL) 1. Remove the photoreceptor drum (see page 4–34). 2. Remove the screw (1) and pull the discharge LED toward you along the guide rail, as shown in the following figure. Screw Discharge LED Figure 4–40 Replacement Procedures 4–51...
Page 214 Cleaning unit 1. Loosen the three thumbscrews securing the drum plate and remove the drum plate. Drum plate Thumbscrews (3) Figure 4–41 4–52 Replacement Procedures...
Page 215 2. Grasp the handle of the cleaning unit. Pull the cleaning unit toward you and remove it. CAUTION Do not turn the cleaning unit upside down, or toner might spill. Cleaning unit handle Figure 4–42 Replacement Procedures 4–53...
Page 216 Drum support rollers There are three small rollers located in the opening where the drum passes when it is removed or installed. These rollers prevent the drum surface from contacting nearby metal parts. To remove either the lower left roller or the lower right roller, remove the screw securing the bracket then remove the roller.
Page 217: Fuser Unit
Fuser Unit WARNING Take care in handling the fuser unit, as the unit reaches high temperatures (over 139 C when the temperature fuse melts) immediately after operation. Be sure to wait to handle it until it is completely cooled down. Also, never scratch or touch the cover glass with your hands.
Page 218: Fuser Unit
1. Lower the transport surface by pressing the green lever on the transport unit to the left. Thumbscrew (not visible in figure) Fuser handle Holding plate Thumbscrew Fuser unit Green lever Figure 4–44 2. Loosen the captive thumbscrews (2) on the right and left fuser unit holding plates. 3.
Page 219 4. With your other hand, grasp the second fuser handle and remove the fuser from the printer. 5. Place the fuser on a clean, flat surface with the cover glass facing up. The fuser unit has the following replaceable parts: Xenon (flash) lamp Cover glass Temperature fuse (LTF)
Page 220 Xenon (flash) lamp and cover glass 1. Remove the fuser unit from the printer (page 4–55). 2. Position the fuser unit with its cover glass facing up. 3. Refer to the following figure and remove the screws (2) securing the paper guide on the paper entrance side of the fuser unit and remove the paper guide.
Page 221 Screws (6) (step 4) Fuser unit cover glass Glass frame Fuser enclosure Screws (2) (step 3) Paper guide Figure 4–45 Replacement Procedures 4–59...
Page 222 5. Refer to the following figure and remove the screws (3) securing the lamp terminals. Xenon (flash) lamp Screws (3) Rear End of Fuser Unit Lamp terminals Front End of Fuser Unit Figure 4–46 4–60 Replacement Procedures...
Page 223 6. Refer to the following figure. Working at the rear end of the fuser unit, observe the lamp bracket at that end of the fuser unit. This bracket is secured with two screws, one near the lamp, and the other farther from the lamp. Remove only the screw farther from the lamp.
Page 224 8. Carefully flex the bracket slightly, and remove the flash lamp. There is a bushing on each end of the flash lamp. When you remove the lamp, be careful not to lose the bushings. CAUTION The lamp is fragile. Take care when handling. Never touch the lamp with your hands.
Page 225 Temperature fuse (LTF) 1. Remove the fuser unit from the printer (page 4–55). 2. Remove the screw (1) securing the fuse holder to the fuser enclosure. Screw Fuser enclosure Fuse holder Figure 4–48 Replacement Procedures 4–63...
Page 226 3. Remove the screw (1) securing the fuse holder cover, then remove the cover. Fuse holder Screw (1) (step 3) Temperature fuse Screws (2) (step 4) Fuse holder cover Figure 4–49 4. Remove the screws (2) securing the temperature fuse, then remove the fuse. 4–64 Replacement Procedures...
Page 227 Lamp housing filter (Fuser unit air filter) 1. Remove the fuser unit from the printer (page 4–55). 2. Remove the screws (2) securing the filter housing to the filter plate. Screws (2) (step 2) Filter Fuser unit Filter housing Filter plate Lamp housing filter assembly Figure 4–50...
Page 228: Transfer Assembly
Transfer Assembly 1. Remove the waste toner recovery unit (page 4–17). 2. Turn the green lever to the left to lower the transport surface. Figure 4–51 3. Pull the transfer assembly out until it stops. 4. Refer to the following figure and remove the screws (6) securing the right and left slide rails to the transfer assembly.
Page 229 Slide rail Screws (6) Screw Slide rail Figure 4–52 Replacement Procedures 4–67...
Page 230 The transfer assembly has the following replaceable parts: Transport belts Vacuum fan (VAF) Connector block for the transfer/separator charger EPS4 assembly The removal procedures for these parts are described in the following sections. 4–68 Replacement Procedures...
Page 231 Transport belts and vacuum fan (VAF) 1. Remove the transfer assembly from the printer (page 4–66). 2. Turn the transfer assembly upside-down. IMPORTANT When turning the transfer assembly upside-down, put a rest underneath it to protect the protruding tips (2 locations) of the sensor levers. Also, be careful when handling the green lever.
Page 232: Transfer Assembly
5. Restore the transfer assembly to its original, rightside-up position. 6. Refer to the following figure and remove the screws (2 on the front, 2 on the rear) securing the output guide, then remove the output guide. Screws (4) Output Guide Transfer assembly Figure 4–54...
Page 233 7. Refer to the following figure and remove the screw (1) and nut (1) securing the stainless plate, then remove the stainless plate. Outer bearing Outer E–ring Conveyer base Stainless Drive shaft Outer E–ring plate Outer bearing high-voltage wire Unit frame Figure 4–55 8.
Page 234 11. Refer to the previous figure and remove the conveyer base from the unit frame. 12. Refer to the following figure and remove the inner E-rings (2) securing the drive shaft to the conveyer base. Inner bearing Inner E–ring Inner bearing Inner E–ring Drive shaft Conveyer base...
Page 235 14. Remove the drive shaft from the conveyer base, then remove the three (3) transport belts, as shown in the following figure. Transport belt (3) Figure 4–57 NOTE: When replacing a transport belt, be careful to distinguish the outer surface of the new belt from its inner surface, as shown in the following figure.
Page 236 15. To adjust the belt tension, refer to the following figure and loosen the screws (2 right, 2 left) securing the belt shaft to the conveyer base, then adjust the tension of the belts by turning the setscrews with a hex wrench. Conveyer base Screws Setscrew...
Page 237 16. Refer to the following figure and adjust the distance between the belt and the conveyer base to approximately 1 cm when the belt center is pulled up with a force of 2 N (200 grams). Firmly tighten the screws (2 right, 2 left) to secure the belt shaft to the conveyer base.
Page 238: Behind The Lower Front Cover
Behind the Lower Front Cover Smoke Filter 1. Move the green knobs (2) at the upper part of the smoke filter box away from each other (to the left and right), then open the smoke filter box cover. Smoke filter box Smoke filter box cover Figure 4–61...
Page 239 2. Remove the smoke filter by pulling it out toward you. Smoke filter Figure 4–62 Replacement Procedures 4–77...
Page 240: Flash Power Supply
Flash Power Supply The following steps describe replacement of the flash power supply. (For additional information, refer to page 3–15 in Chapter 3, “Electrical System and Adjustments.”) WARNING When replacing the flash power supply, take care of the following: After you turn off the main power, wait at least 5 minutes for the high-voltage DC charge in some components to be completely discharged before proceeding to the next step.
Page 241 Flash power supply Screws (2) Figure 4–63 Replacement Procedures 4–79...
Page 242 6. Refer to the following figure and disconnect connectors J11 and TRG from the flash power supply. 7. Refer to the following figure and remove the cover from the AC line terminal strip on the flash power supply, then disconnect AC lines “L” (black) and “N” (white). Flash power supply High-voltage cables (2) (to fuser unit)
Page 243 8. Refer to the previous figure and remove the screw securing the frame ground (FG) wire to the base of the printer frame. 9. Refer to the previous figure and remove the high-voltage terminal cover from the flash power supply. 10.
Page 244: Capacitor
Capacitor Follow the steps below to replace the capacitor inside the flash power supply. WARNING When replacing the flash power supply capacitor, take care of the following: After you turn off the main power, wait at least 5 minutes for the high-voltage DC charge in some components to be completely discharged before proceeding to the next step.
Page 245 Flash power supply Front cover Screws (8) Figure 4–65 Replacement Procedures 4–83...
Page 246 3. Refer to the following figure and remove the screws (8) securing the left cover of the flash power supply, then remove the cover. Left cover Screws (8) Figure 4–66 4–84 Replacement Procedures...
Page 247 4. Refer to the following figure, and mark or tag the wires connected to the capacitor, so that you can reconnect them properly later. 5. Refer to the following figure and remove the nuts (2) and lockwashers (2) securing the wires to the capacitor terminals. 6.
Page 248 Capacitor Screws (4) Frame ground Screw (1) (FG) wire Nuts (2) Lockwashers (2) Capacitor Figure 4–67 4–86 Replacement Procedures...
Page 249: Dc Power Supply
DC Power Supply 1. Turn the printer power switch OFF. 2. Unplug the printer AC power plug from its electrical outlet. 3. Open the printer lower front cover and lower rear cover. 4. Turn off the circuit breaker (NFB) in the printer. 5.
Page 250 DC power supply Screws (4) Screws (2) (step 7) (step 6) Figure 4–68 4–88 Replacement Procedures...
Page 251: Dc Power Supply Board
DC Power Supply Board 1. Remove the DC power supply from the printer (page 4–87). 2. Refer to the following figure and remove the screws (10) securing the power supply cover to the DC power supply: 3 screws from each of the end panels, and 4 screws from the rear panel of the cover.
Page 252 DC power supply Connectors (11 places) (step 5) Screws (10) (step 2) connector (step 3) DC power supply board Screws (6) (step 6) Power supply cover Figure 4–69 4–90 Replacement Procedures...
Page 253 3. Refer to the previous figure and remove the power supply cover far enough to gain access to the fan connector, then disconnect the fan connector from the DC power supply board. 4. Refer to the previous figure and remove the cover from the power supply. 5.
Page 254: Controller Module
Controller Module The controller module consists of the following subassemblies: Controller board Power supply Cooling fan Floppy disk drives (not used on printers with flash memory) In addition, the controller board contains socketed terminating resistors for the parallel interface. The values of these resistors might need to be changed for some parallel interface applications.
Page 255: Controller Board
Controller Board Removal CAUTION To prevent electrostatic damage to electronic components, always wear a properly grounded static wrist strap when you handle circuit boards and integrated circuits (ICs). 1. Make a configuration printout of all saved configurations. (Refer to the User’s Manual .) 2.
Page 256 10. Referring to Figure 4–71 on page 4–97, find the NVRAM IC on your controller board (board location U6) and determine if the IC is socketed or soldered. (Some controller boards have the NVRAM IC socketed as shown in the figure; other controller boards have this IC soldered to the board.) 11.
Page 257 3. Press inward on the controller board to seat it in its card cage connector. 4. Reinstall the controller board retaining brackets (2) and secure them with the screws (2) you removed earlier. 5. Replace the host interface panel and secure it with the screws and washers (4 each) you removed earlier.
Page 258: Controller Module
Controller module Floppy disk drives (Ref.) (Not used on flash memory equipped printers) Controller board (Flash memory equipped printers) Flash memory (Ref.) Host interface panel Screws (4) Controller board Washers (4) (Floppy drive equipped printers) Figure 4–70. Controller Board Removal/Installation 4–96 Replacement Procedures...
Page 259 Controller board Flash memory (Ref.) NVRAM IC Figure 4–71. NVRAM Removal/Installation Replacement Procedures 4–97...
Page 260 Terminating Resistors For parallel interface configurations, the printer is equipped with 470 ohm pullup terminating resistors and 1K ohm pulldown terminating resistors on the controller board. These are suitable for most applications. (See the figure on page 4–99.) If the standard terminating resistor packs are not compatible with the particular interface driver requirements of the host computer, other values of pullup and pulldown resistors might be required.
Page 261: Controller Board
Controller Board RP28 Default: 470 ohm / 1K ohm Alt: 220 ohm / 330 ohm RP29 Default: 470 ohm / 1K ohm Alt: 220 ohm / 330 ohm Figure 4–72. Terminating Resistors, Removal/Installation Replacement Procedures 4–99...
Page 262: Power Supply (In Controller Module)
Power Supply (in Controller Module) 1. Turn off the printer. 2. Unplug the printer AC power plug from its electrical outlet. 3. Open the lower front cover (page 4–6). 4. Remove the controller module side cover (page 4–101). 5. Remove the screw and washer (1 each) that secure the AC line cover to the controller module side cover.
Page 263 AC connector Floppy disk drives (Ref.) Controller module (Not used on flash memory equipped printers) Power supply Side cover Rotated for clarity Figure 4–73. Power Supply (in Controller Module) Removal/Installation Replacement Procedures 4–101...
Page 264: Cooling Fan (In Controller Module)
Cooling Fan (in Controller Module) 1. Turn off the printer. 2. Unplug the printer AC power plug from its electrical outlet. 3. Open the lower front cover (page 4–6). 4. Remove the controller module side cover (page 4–103). 5. Disconnect the fan power cable connector and remove the cable tie wrap (not shown).
Page 265 Floppy disk drives (Ref.) (Not used on flash Controller module memory equipped printers) Side cover Figure 4–74. Cooling Fan (in Controller Module) Removal/Installation Replacement Procedures 4–103...
Page 266: Floppy Disk Drives (Not Used On Printers With Flash Memory)
Floppy Disk Drives (not used on printers with flash memory) 1. Turn off the printer. 2. Unplug the printer AC power plug from its electrical outlet. 3. Open the lower front cover (page 4–6). 4. Remove the controller module side cover (page 4–105). 5.
Page 267 Controller module Floppy disk drives (2) Bracket Side cover Figure 4–75. Floppy Disk Drives Removal/Installation Replacement Procedures 4–105...
Page 268: Smoke Filter Blower Fan
Behind the Rear Covers The items shown in Figure 4–76 are located behind the rear covers. Fuser unit cooling fan Drum shaft assembly Surface potential measurement board Feed motor Developer motor Drum motor Smoke filter blower fan Transfer elevator motor board (behind cover...
Page 269: Mpu Board
MPU Board IMPORTANT Whenever you replace the MPU board, you must perform the necessary adjustments. See the section titled “Adjustments” on page 3–53 in Chapter 3, “Electrical System and Adjustments.” 1. Turn the printer power switch OFF. 2. Unplug the printer AC power plug from its electrical outlet. 3.
Page 270 5. Refer to the following figure and disconnect the connectors (11) from the MPU board. CN11 CN10 Figure 4–78. MPU Board Connector Locations 4–108 Replacement Procedures...
Page 271 6. Refer to the following figure and remove the screws (8) securing the MPU board, then remove the board. Screws (8) Figure 4–79. MPU Board Mounting Screw Locations Replacement Procedures 4–109...
Page 272: Mpu Board Roms
MPU Board ROMs 1. Remove the MPU board from the printer (page 4–107). 2. Using a chip puller, remove ROM(0) and ROM(1) from the MPU board, at the locations indicated in the following figure. ROM (0) ROM (1) Figure 4–80. MPU Board ROM Locations 4–110 Replacement Procedures...
Page 273: Motors
Motors Cutter motor To replace the cutter motor, you must first remove the exit unit from the printer, then remove the cutter unit from the exit unit, then finally remove the cutter motor from the cutter unit. The following sections detail these procedures. Exit unit removal (with cutter unit attached) 1.
Page 274 Screw (1) (step 7) Cover open switch harness connector (1) (Not visible in figure; located behind exit unit) (step 4) Front End of Exit Unit Exit unit Nut (1) Harness (step 7) connectors (4) (step 5) Screw (1) (step 8) Nut (1) (step 8) Rear End of...
Page 275 Cutter unit removal 1. Remove the exit unit from the printer. (See “Exit unit removal” on page 4–111.) 2. Remove the screws (2) from the front end of the exit unit, as shown in the following figure. 3. Remove the screws (2) from the rear end of the exit unit, as shown in the following figure.
Page 276 Front End of Exit Unit Screws (2) (step 2) Exit unit Cutter unit Screws (2) (step 3) Rear End of Exit Unit Figure 4–82 4–114 Replacement Procedures...
Page 277 Cutter motor removal 1. Remove the cutter unit from the printer. (See “Cutter unit removal” on page 4–113.) 2. Refer to the following figure and pull the cutter motor connector out through the hole in the cutter unit frame. 3. Slip the drive belt off of the motor pulley. 4.
Page 278 Motor pulley Setscrew Screws (3) Cutter unit Drive belt Rear End of Cutter Unit Cutter motor connector Cutter motor Hole in the frame Figure 4–83 4–116 Replacement Procedures...
Page 279 Drum motor 1. Disconnect the connector from the drum motor. 2. Remove the screws (4) securing the drum motor, then remove the motor. Drum motor Connector Screws (4) Figure 4–84 Replacement Procedures 4–117...
Page 280 Developer motor 1. Disconnect the developer motor connector. 2. Remove the screws (4) securing the developer motor assembly, then remove the developer motor assembly with the developer motor attached. 3. Remove the screws (4) securing the developer motor to the developer motor assembly, then remove the motor.
Page 281 Feed motor 1. Disconnect the feed motor connector. 2. Remove the screws (2) securing the feed motor, then remove the motor. Figure 4–86 Replacement Procedures 4–119...
Page 282 Tractor motor 1. Refer to the following figure and remove the screws (3) securing the right side cover. Disconnect the power switch connector from its mating harness connector, then remove the right side cover. Front Side of Printer Screws (3) Harness Rear Side connector...
Page 283 Screws (3) Motor cover Tractor motor Screws (4) Tractor motor connector Figure 4–88 Replacement Procedures 4–121...
Page 284 Transfer elevator motor 1. Refer to the following figure and disconnect the transfer elevator motor connector from its mating harness connector. Transfer elevator Harness motor connector connector Transfer elevator motor assembly Screws (3) Figure 4–89 2. Remove the screws (3) securing the transfer elevator motor assembly to the printer, then pull the assembly part of the way out of the printer, as shown in the previous figure.
Page 285 3. Turn the transfer elevator motor assembly around so that the shaft is facing you, as shown in the following figure. Then, using a hex wrench, loosen the setscrew securing the coupling to the motor shaft, and remove the coupling from the shaft. Transfer elevator motor assembly Coupling...
Page 286 4. Turn the transfer elevator motor assembly around so that the shaft is away from you, as shown in the following figure. Then, remove the screws (2) securing the transfer elevator motor to the transfer elevator motor assembly, and remove the transfer elevator motor.
Page 287: Fans
Fans Fuser unit cooling fan (FCF) 1. Disconnect the fan connector from its mating harness connector. 2. Remove the screws (4) securing the fan and fan plate to the duct. Duct Fuser unit cooling fan Fan plate Screws (4) Fan connector Figure 4–92 Replacement Procedures 4–125...
Page 288: Solenoids
Solenoids Cutter solenoid (CSL) 1. Disconnect the cutter solenoid connector from its mating harness connector. 2. Remove the screws (2) securing the solenoid mounting bracket to the printer. Screws (2) Cutter solenoid Cutter solenoid connector Figure 4–93 4–126 Replacement Procedures...
Page 289: Miscellaneous
Miscellaneous Tension arm To remove the tension arm at the exit unit, remove the E-ring from the tension arm shaft, then remove the tension arm. Tension arm shaft Tension arm E-ring Figure 4–94 Replacement Procedures 4–127...
Page 290 Main Charger Varistor (MCH) 1. One end of the main charger varistor is connected to the main charger connector via a high-voltage cable. Remove the screw (1) securing this varistor terminal to the high-voltage connector. Main charger varistor Screws (2) (step 2) Screw (1) (step 1)
Page 291 Paper Output Belt To remove the paper output belt, lift the tension roller, then remove the belt. Tension roller Paper output belt Figure 4–96 Replacement Procedures 4–129...
Page 292: Under The Top Cover
Under the Top Cover The items shown in Figure 4–97, on pages 4–130 and 4–131, are located under the top cover. High-voltage power supply Drum surface potential sensor Front Side of Printer Paper exit sensor 1 (Paper output sensor) (EPS1) Figure 4–97.
Page 293 LED print head (LED array) Nip switch Rear Side of Printer Cleaning unit set sensor (Drum cleaner set sensor) Figure 4–97. Under the Top Cover (Continued) Replacement Procedures 4–131...
Page 294: Led Print Head (Led Array)
LED Print Head (LED Array) NOTE: To install the LED print head, you will need two alignment pins (LED positioning pins) (see Figure B–31 on page B–82 for the part number). The pins are used to align the print head when installing it. 1.
Page 295 5. Refer to the following figure and remove the screws (3) securing the heat pipe clamps, then remove the heat pipe by moving it toward the rear of the printer. Screws (3) Clamps (3) Heat pipe Figure 4–99 Replacement Procedures 4–133...
Page 296 6. Refer to the following figure and remove the screws (4) securing the LED print head, then lift the print head to remove it. CAUTION Do not touch the surface of the print head during removal or installation, as you will leave fingerprints. Screws (4) LED print head Figure 4–100...
Page 297 7. When installing the LED print head, insert the alignment pins (LED positioning pins) (2 pins: 1 right, 1 left) into the center hole at each end of the print head, as shown in the following figure. 8. Refer to the following figure and place the LED print head in its original position (on the print head mounting brackets in the printer).
Page 298 Alignment pins (2) Screws (4) LED print head Print head mounting brackets (2) Figure 4–101 4–136 Replacement Procedures...
Page 299 11. Rub thermal compound over the heat pipe and print head. Install the heat pipe. 12. Using the screws that you removed previously, reinstall the heat pipe clamps and refasten the head thermistor terminal. 13. Reconnect the print head connectors (3) to their original connectors on the LED print head.
Page 300: High-Voltage (Corona) Power Supply
High-Voltage (Corona) Power Supply 1. Refer to the following figure and remove the screw (1) securing the power supply frame ground wire to the printer frame. 2. Disconnect the multiwire connector (1) from the high-voltage power suppy. 3. Disconnect the high-voltage wires (7) from the output terminals (7) of the power supply.
Page 301: Sensors And Switches
Sensors and Switches Drum surface potential sensor and surface potential measurement board 1. Remove the printer top cover (see page 4–4). 2. Remove the developing unit (see page 4–19). 3. Remove the photoreceptor drum (see page 4–34). 4. At the rear side of the printer, disconnect the harness connector (1) from the surface potential measurement board, as shown in the following figure.
Page 302 Surface potential measurement board Screws (4) Connector Figure 4–104 4–140 Replacement Procedures...
Page 303 6. At the rear side of the printer, remove the screw (1) securing the sensor bracket, as shown in the following figure. Screw Figure 4–105 Replacement Procedures 4–141...
Page 304 7. At the front side of the printer, remove the screws (2) securing the sensor bracket, as shown in the following figure. Screws (2) Figure 4–106 8. At the rear side of the printer, pull the sensor bracket (with the sensor attached) out of the printer.
Page 305 Cleaning unit set sensor (Drum cleaner set sensor) The cleaning unit set sensor is a limit switch that detects whether or not the cleaning unit is set (that is, it detects that the cleaning unit is present and properly seated). The sensor is a microswitch;...
Page 306 Sensor cable Sensor harness connector Bracket Printer frame Microswitch Screws (2) connector (step 2) Microswitch Screws (2) (step 5) Figure 4–108 2. Remove the screws (2) securing the bracket to the printer frame, as shown above. 3. Insert your hand from the top of the rear panel, then remove the microswitch with the sensor cable and bracket attached.
Page 307 Paper exit sensor 1 (Paper output sensor) (EPS1) 1. Disconnect the harness connector. 2. Press inward on the sensor claws (4) and remove paper exit sensor 1. Replacement Procedures 4–145...
Page 308 Paper exit sensor 1 (Paper output sensor) (EPS1) Sensor claws (4) Harness connector Figure 4–109 4–146 Replacement Procedures...
Page 309: Other Items
Other Items Removing the Tractor Unit from the Printer WARNING Do not touch the tractor area during printing. Also, never stare at the tractor section during printing, since a strong light is emitted from the printer during printing. 1. Refer to the following figure and remove the screws (3 at the left, 3 at the right) securing the left and right side covers.
Page 310 Front Side of Printer Side covers Rear Side of Printer Harness Screws (6) connector Power switch connector Figure 4–110 4–148 Replacement Procedures...
Page 311 2. Refer to the following figure and disconnect the tractor motor harness connector and the tractor sensor harness connector from their mating connectors on the frame of the tractor unit. Front Side of Printer Screws (2) (remove) (step 3) Tractor motor harness connector Tractor unit Rear Side...
Page 312 4. Refer to the following figure and loosen, but do not remove, the indicated screws (2) at the rear side of the printer. Front Side of Printer Tractor unit Screws (2) (loosen) (step 4) Rear Side of Printer Figure 4–112 4–150 Replacement Procedures...
Page 313 5. Refer to the following figure and remove the indicated screws (2) and the nut (1) at the front side of the printer. 6. Refer to the following figure and loosen, but do not remove, the indicated screws (2) at the front side of the printer, then remove the tractor unit from the printer.
Page 314 Removing the Tractors from the Tractor Unit 1. Remove the tractor unit from the printer (see page 4–147). 2. Refer to the following figure and remove the E-ring (1) securing the left tractor on the tractor support shaft. Tractor support shaft Rear End of Tractor Unit Tractor bottom plate...
Page 315 3. Refer to the previous figure and remove the E-ring (1) securing the front end of the tractor splined shaft. Remove the bearing (not shown). 4. Remove the screw (1) securing the front end of the tractor support shaft. 5. Refer to the previous figure and remove the screws (2) securing the tractor bottom plate to the front tractor end plate.
Page 316 6. Refer to the following figure and slide the tractor splined shaft toward the rear end of the tractor unit, and remove the tractor splined shaft from the tractor unit. Front End of Tractor Unit Tractors Paper guides Tractor support shaft E-ring Tractor unit...
Page 317 7. Refer to the previous figure and remove the E-ring (1) securing the rear end of the tractor support shaft. 8. Refer to the previous figure and remove the tractors, the paper guides, and the tractor support shaft together from the tractor unit. 9.
Page 318: Paper Back-Feed Sensor (Pbfs)
Paper Back-Feed Sensor (PBFS) 1. Remove the screws (2). Paper back-feed sensor Sensor connector Screw (1) (step 3) Screws (2) (step 1) Sensor bracket Figure 4–116 2. Pull the sensor bracket out toward you, then disconnect the sensor connector at the inner side.
Page 319: Paper Near-End Sensor (Pnes)
Paper Near-End Sensor (PNES) Photoemitting board 1. Remove the screws (4) securing the photoemitting board cover, then remove the cover. 2. Remove the screw (1) securing the photoemitting board bracket to the paper near-end sensor assembly. 3. Remove the screw (1) securing the photoemitting board to the photoemitting board bracket.
Page 320 Photoreceptor board 1. Remove the screws (4) securing the photoreceptor board cover, then remove the cover. 2. Remove the screw (1) securing the photoreceptor board bracket to the paper near-end sensor assembly. 3. Remove the screw (1) securing the photoreceptor board to the photoreceptor board bracket.
Page 321: Replacement Parts
Replacement Parts There are parts that need to be replaced periodically during the use of this print engine in order to maintain the functions of the print engine. Since the parts differ in life, use the number of sheets (A4 paper conversion) printed as a guideline. Refer to Chapter 7 for details.
Page 322 4–160 Replacement Procedures...
Page 323: Setup
Setup Chapter Contents Power Requirements ............5–2 Site Selection .
Page 324: Power Requirements
Power Requirements WARNING Do not connect the printer to the power source until instructed to do so and until all shipping restraints have been removed. The operator–accessible power switch does not shut off all power to the printer. Unplug the printer power cord from its AC line receptacle to shut off all power to the printer.
Page 325 Instructions for connecting the power cord to the printer are provided on page 5–9. The choice of cable plugs is determined by the requirements of the country in which the printer is installed. NOTE: For additional information on printer power requirements, see Appendix A, “Specifications.”...
Page 326: Site Selection
Site Selection Select a location for the printer that conforms to the following requirements: The location has a power source that conforms to the requirements specified on page 5–2. The location is within the maximum cable length specifications for the host computer interface.
Page 327 36 in. (91.4 cm.) 61 in. (155 cm.) 58 in. (147.3 cm.) Figure 5–1. Printer Dimensions (In Crate) Setup 5–5...
Page 328 30 in. 47 in. (76 cm.) (119 cm.) 34 in. (86 cm.) 13 in. (33 cm.) 49 in. (124 cm.) 36 in. (91 cm.)* *Leave at least 36 in. (91 cm.) around the entire printer. Figure 5–2. Printer Dimensions (Unpacked) 5–6 Setup...
Page 329: Unpacking And Leveling
Unpacking and Leveling After a site has been selected for the printer, set up the printer according to the following procedures. 1. Open the packaging and refer to the Unpacking Instructions for a list of parts supplied in the package. Unpack the printer and consumables as described in these instructions.
Page 330 Level in the two orthogonal directions Height adjusting legs (4 places) Figure 5–3. Leveling the Printer 5–8 Setup...
Page 331: Cable Connections
Cable Connections Power Cord The procedure to install the power cord is identical for both domestic and international power cords, using the following power cord part numbers: P/N 703904–001: for installation in the United States and Canada. The mating connector for the printer power cord should be a NEMA L6–30P female connector, rated at 250 VAC and 30 Amps.
Page 332 2. Pull the right side of the lower rear cover toward you to open it. Lower rear cover AC power terminal box Figure 5–5 5–10 Setup...
Page 333 3. Remove the screws (4) securing the AC power terminal box cover, then remove the cover, as shown below. 4. Remove the screws (2) on the terminal cover inside the terminal box, then remove the cover, as shown below. Terminal block Screws (4) Screws (2) Terminal cover...
Page 334 5. Refer to the following figure and connect the power cord to the terminal block as follows: a. Connect the protective ground wire (green or striped green/yellow) from the power cord to terminal “G” on the terminal block. b. Connect the neutral wire (white or blue) from the power cord to terminal “N” on the terminal block.
Page 335: Power Cord
AC power terminal box Terminal block Terminal “L” Line wire (black or brown) Terminal “N” Terminal “G” Neutral wire (white or blue) Ground wire (green or striped green/yellow) Power cord Figure 5–7 Setup 5–13...
Page 336: Interface Cable
Interface Cable Now the printer can be connected to your system. To connect the cables, refer to the illustration on the following page and perform the steps listed below. 1. Connect the interface cable to the appropriate printer interface connector and to the host computer.
Page 337 232/422 switch Parallel port interface connector Diagnostic port Serial port connector interface connector The RS–232/422 select switch must be set properly for your application. The factory default setting is RS–232. Figure 5–8 Setup 5–15...
Page 338: Installing The Developing Unit
Installing the Developing Unit To install the developing unit for the first time, perform the following steps. 1. Remove the developing unit from its package and place it on a protected surface. CAUTION The toner sensor is sensitive to both electrostatic discharge (ESD) and positional adjustment.
Page 339 3. Locate the developer bottle. Nozzle Developer bottle Figure 5–10 4. Shake the developer bottle several times, remove the bottle cap, and screw the nozzle tightly onto the bottle. Setup 5–17...
Page 340 5. While rotating the developing roller knob counterclockwise, evenly pour the entire bottle of developer powder into the developing unit. Developer bottle Developing roller knob Figure 5–11 6. Replace the developing unit cover and tighten the three screws. IMPORTANT If toner or developer spills on clothing, use cold water to remove it. 7.
Page 341 8. Press down on the opening latch and swing open the waste toner recovery unit door. Opening latch Waste toner recovery unit door Figure 5–12 Setup 5–19...
Page 342 CAUTION Failure to perform Step 9 damages the photoreceptor drum. 9. Verify that the developing unit lever is pointing straight up. If it is not, rotate it fully clockwise so that it is pointing straight up. Lever Figure 5–13 5–20 Setup...
Page 343 10. Holding the lever in one hand and the hanger in the other hand, insert the developing unit on the guide rail. Guide Rail Hanger Lever Figure 5–14 Setup 5–21...
Page 344 11. Rotate the hanger to the right so that it rests against the developing unit, and push the developing unit in. Hanger (rotated down) Figure 5–15 5–22 Setup...
Page 345 12. Rotate the developing roller knob counterclockwise until the unit drops into its final resting position. The positioning pin should protrude through the main body of the developing unit. Positioning pin Developing roller knob Figure 5–16 Setup 5–23...
Page 346: Installing The Photoreceptor Drum
Installing the Photoreceptor Drum These instructions describe the initial installation of the photoreceptor drum. To install the drum, you will need a drum auxiliary rod (listed on page B–82). Please read all steps before beginning the installation process. CAUTION Installation of the photoreceptor drum should be performed only by an individual who has received the appropriate training.
Page 347 CAUTION The transfer charger must be in the down position to avoid scratching the drum. Failure to perform steps 1 and 2 damages the drum. 1. Check that the transfer charger (TCH) is in its down position. If it is not, move it to the down position by rotating the transfer elevator drive shaft counterclockwise with a screwdriver.
Page 348 Transfer charger Transfer elevator drive shaft Figure 5–17 5–26 Setup...
Page 349 2. Lower the transport unit by turning the green lever on the transport unit to the left. Green lever Figure 5–18 Setup 5–27...
Page 350 3. Loosen the thumbscrews (3) securing the drum plate and remove the drum plate. Drum plate Thumbscrews (3) Figure 5–19 5–28 Setup...
Page 351 4. Remove the nut from the end of the drum shaft. Figure 5–20 Setup 5–29...
Page 352 5. Screw the drum auxiliary rod onto the drum shaft. Drum shaft Drum auxiliary rod Figure 5–21 6. Wipe the drum shaft clean with a cloth. 5–30 Setup...
Page 353 7. Remove the photoreceptor drum from its package. Do not discard the packaging material, as it will be needed for future drum disposal. Note that the ends of the drum are identical; there are no front or back ends. Wipe inside the endcaps of the drum with a cloth to ensure that they are clean. CAUTION Exposing the drum to light shortens its life.
Page 354 Drum Drum auxiliary rod Figure 5–22 5–32 Setup...
Page 355 9. When the drum is fully inserted into the printer, the end of the drum will be slightly recessed relative to the front of the printer. At this point, the rubber guide rollers should be visible. Slightly lift the drum up off of the rubber rollers and rotate the drum by hand while applying inward pressure, until the drum moves slightly farther into the printer and locks in place.
Page 356 15. Rotate the developing unit lever fully counterclockwise to lock the developing unit in place. Lever Figure 5–23 5–34 Setup...
Page 357: Installing The Toner Cartridge And Waste Toner Bottle
Installing the Toner Cartridge and Waste Toner Bottle To install the toner cartridge and waste toner bottle for the first time, perform the following steps. NOTE: Vinyl gloves may be worn to prevent toner from contacting the skin. If necessary, use only cold water to remove toner from skin or clothing. 1.
Page 358 3. Refer to the following figure. With the cover tape facing up, begin inserting the cartridge into the toner hopper, and slowly pull off the cover tape in the direction of the arrow. Remove the last of the tape just as the cartridge is completely inside the hopper.
Page 359 4. Refer to the following figure and align the notch on the cartridge with the positioning pin on the developing unit. Push the new toner cartridge as far as possible into the toner hopper. Toner cartridge Notch Positioning pin Figure 5–26 5.
Page 360 7. Install a new waste toner bottle, as shown below. Waste toner bottle Cap storage location Figure 5–27 8. Remove the cap from the waste toner bottle, and store it in the cap storage location, as shown above. 9. Close the waste toner recovery unit and ensure that it latches. 10.
Page 361: Loading Paper
Loading Paper NOTE: Refer to Appendix A, “Specifications,” for allowable paper types and sizes. 1. Position the blank paper below the paper entrance of the printer. Paper near-end sensor guides First paper fold is toward printer Figure 5–28 Setup 5–39...
Page 362 2. Pass the paper between the paper near-end sensor guides, as shown in the previous figure. IMPORTANT The first fold of the paper should be facing toward the printer. Otherwise, a paper jam could occur during printing (see previous figure). Tractor lock lever Tractor gate Tractor...
Page 363 4. Close the tractor gates and lock their position with the tractor lock levers, as shown in the previous figure. IMPORTANT Be careful of the following two points when loading paper: If the paper is too taut or too slack, the paper may become jammed during printing.
Page 364: Installing The Diskettes (If Applicable)
Installing the Diskettes (If Applicable) Some versions of the printer use flash memory to store emulation code and fonts. If your printer uses flash memory, the emulation code and fonts will have been stored in the flash memory at the factory. In this case, skip to the next section, “Verifying Printer Operation.”...
Page 365 Power Switch Diskette Drives Figure 5–30. Power Switch and Diskette Drives Setup 5–43...
Page 366: Verifying Printer Operation
Verifying Printer Operation WARNING To prevent injury to yourself or damage to the printer, make sure the printer is connected to a proper power source. VORSICHT Um Verletzungen oder Schäden am Drucker zu verhindern, achten Sie darauf, daß der Drucker an eine ordnungsgemäß installierte Steckdose angeschlossen wird.
Page 367 Lower rear cover AC power terminal box Circuit breaker lever Figure 5–31 Setup 5–45...
Page 368 6. Turn the ON/OFF switch on the printer to the 1 (ON) position. Note that when you power on a diskette-equipped printer, the following events occur: The printer reads the emulation boot diskette and displays the message “LOADING PROGRAM FROM DISK.” The printer retrieves font information from the diskette and displays “LOADING FONTS FROM DISK.”...
Page 369 Index Numbers 1A Surface Voltage too Low: Vol. 2 7–22, 7–44 01 Front Cover Open: Vol. 2 7–21, 7–29 1D Surface Voltage Fail: Vol. 2 7–22 02 Paper Empty 1E Fuser Supply Fail: Vol. 2 7–23, 7–45, upon power–on: Vol. 2 7–21, 7–30, 7–60, 7–87, 7–89 7–72 1F Fuser Failure: Vol.
Page 370 41 Engine CPU Fail: Vol. 2 7–24, 7–56 8 MB EDO DRAM SIMM, in illustrated parts list: Vol. 2 B–79 42 Engine CPU Fail: Vol. 2 7–24, 7–56 9–inch Phillips screwdriver, tools, in illustrated 43 Engine CPU Fail: Vol. 2 7–24, 7–56 parts list: Vol.
Page 371 Belt serial 232/422, in illustrated parts list: Vol. 2 B–79 exit feed roller, in illustrated parts list: Vol. 2 B–51 varistor/high–voltage cable, in illustrated parts list: Vol. 2 B–41 in illustrated parts list: Vol. 2 B–51 transport, in illustrated parts list: Vol. 2 Cable assembly B–23 diagnostic, in illustrated parts list: Vol.
Page 372 SELFOC lens: Vol. 2 6–57 Control menus, hidden: Vol. 2 7–4 transfer/separator charger: Vol. 2 6–32 Control panel, engine checker: Vol. 2 8–8 transport unit: Vol. 2 6–22 Control panel commands, power paper Cleaning intervals stacker: Vol. 2 C–3 service provider responsibility: Vol. 2 6–10 Controller board, controller module, replacing: user responsibility: Vol.
Page 373 Corona power supply DC power supply in illustrated parts list: Vol. 2 B–29, B–81 in illustrated parts list: Vol. 2 B–29 replacing: Vol. 1 4–87 interface: Vol. 1 3–30 replacing: Vol. 1 4–138 DC power supply board, replacing: Vol. 1 4–89 Cover behind lower front: Vol.
Page 374 installation (initial printer setup): Vol. 1 Drive assembly 5–16 developing unit, in illustrated parts list: Vol. interface: Vol. 1 3–22 2 B–27, B–65 recharging. See Developer, replacing floppy disk, in illustrated parts list: Vol. 2 B–79 removing foreign matter: Vol. 2 7–80 replacing: Vol.
Page 375: Volume Adjustment Menu
Drum motor unit AU, in illustrated parts list: Electromagnetic interference specifications: Vol. 2 B–53 Vol. 2 A–7 Electronics initialization, theory: Vol. 1 2–36 Drum plate, in illustrated parts list: Vol. 2 B–7 Elevator motor, transfer, replacing: Vol. 1 Drum setting rod (drum auxiliary rod), tools, in 4–122 illustrated parts list: Vol.
Page 376: Eraser Lamp
Engine CPU Fail (Error 3F): Vol. 2 7–24, Error codes 7–56 01 Front Cover Open: Vol. 2 7–21, 7–29 02 Paper Empty Engine CPU Fail (Error 40): Vol. 2 7–24, upon power–on: Vol. 2 7–21, 7–30, 7–56 7–60, 7–72 Engine CPU Fail (Error 41): Vol. 2 7–24, when loading/beginning print: Vol.
Page 377 21 Fuser Fan Fail: Vol. 2 7–23 58 Stacker Jam at Paper Sensor: Vol. 2 7–26 26 No Cleaning Unit: Vol. 2 7–23, 7–51 28 Waste Toner Full: Vol. 2 7–23, 7–52 59 Stacker Jam at Roller Sensor: Vol. 2 7–26 29 No Waste Toner Box: Vol.
Page 378: Fanfold Paper
K9 PROGRAM NEEDS MORE DRAM: Feed motor, replacing: Vol. 1 4–119 Vol. 2 7–28 Feed motor unit, in illustrated parts list: Vol. 2 L0 INVALID DRAM CONFIGURATION: B–57 Vol. 2 7–28 Felt tip wire cleaner, tools, in illustrated parts Error messages table: Vol. 2 7–20 list: Vol.
Page 379 H5 WRITE FILE: filename.ext: Vol. 2 Formula, conversion, drum count to number 7–27 of sheets: Vol. 1 4–159 H6 OPTIMIZING FILE SYSTEM xx%: Front cover, lower: Vol. 1 4–6 Vol. 2 7–27 behind: Vol. 1 4–76 H7 DELETE FILE: filename.ext: Vol. 2 Front Cover Open (Error 01): Vol.
Page 380: Hidden Control Menus
in illustrated parts list: Vol. 2 B–19 replacing: Vol. 1 4–58 H0 TEST HARDWARE PLEASE WAIT ..: fuser fuse assembly, in illustrated parts list: Vol. 2 7–26 Vol. 2 B–19 H1 DIAGNOSTIC PASSED: Vol. 2 7–26 glass frame assembly, in illustrated parts list: Vol.
Page 381 Holder, bearing, transport unit, in illustrated parts list: Vol. 2 B–23 Jam ratio, power paper stacker: Vol. 2 C–4 Host interface specifications: Vol. 2 A–5 Jam sensor lever (EPS3), in illustrated parts list: Vol. 2 B–23 Jam sensor lever (EPS4), in illustrated parts list: Vol.
Page 382: Maintenance Schedules
Lamp housing filter, fuser unit, replacing: Vol. Log sheets, maintenance: Vol. 2 6–4 1 4–65 Low toner: Vol. 2 7–75 Lamp housing filter assembly, in illustrated Low toner density: Vol. 2 7–76 parts list: Vol. 2 B–19 Lower front cover: Vol. 1 4–6 Language, setting: Vol.
Page 383 Menu 1E Fuser Supply Fail: Vol. 2 7–23, 7–45, 7–87, 7–89 engine checker. See Engine checker. 1F Fuser Failure: Vol. 2 7–23, 7–47, global memory adjust: Vol. 2 7–5 7–87, 7–89 printer control: Vol. 2 7–7 20 Fuser Lamp Overheat: Vol. 2 7–23, Menus, hidden control: Vol.
Page 384: Tractor Motor Unit
53 Stacker Fail: Vol. 2 7–25 K5 DRAM FAIL AT ADDRESS xxxxxxxx: Vol. 2 7–28 54 Stacker Fail: Vol. 2 7–25 K6 FLASH MEMORY FAIL: Vol. 2 7–28 55 Stacker Busy: Vol. 2 7–25 K7 PROGRAM FLASH FAIL AT xxxxxxxx: 56 Stacker Fail: Vol.
Page 385 Motor unit feed, in illustrated parts list: Vol. 2 B–57 O–ring transfer elevator, in illustrated parts list: drum support assembly, in illustrated parts Vol. 2 B–27, B–59 list: Vol. 2 B–33 Motors, replacing: Vol. 1 4–111 drum surface potential sensor assembly, in illustrated parts list: Vol.
Page 386: Paper Specifications
Paper Jam at Exit (Error 04): Vol. 2 7–21, 7–57, 7–69, 7–73, 7–90 Pad, drum freshener, tools, in illustrated parts Paper Jam at Exit (Error 05): Vol. 2 7–21, list: Vol. 2 B–83 7–57, 7–70, 7–74 Page counter, messages: Vol. 2 6–7 Paper Jam at Exit (Error 13): Vol.
Page 387: Physical Description
PCBA Photoconduction section, theory: Vol. 1 2–4 DC power supply, in illustrated parts list: Photoreceptor drum Vol. 2 B–81 cleaning: Vol. 2 6–46 DCPS disposal: Vol. 1 4–48 24V, in illustrated parts list: Vol. 2 in illustrated parts list: Vol. 2 B–7, B–9 B–81 installation (initial printer setup): Vol.
Page 388: Host Interfaces
Power supply Print head connector for power supply, in illustrated parts list: Vol. 2 B–41 cleaning: Vol. 2 6–57 in illustrated parts list: Vol. 2 B–27, controller module B–35 in illustrated parts list: Vol. 2 B–79 setting density: Vol. 1 3–62 replacing: Vol.
Page 389 periodic toner stains: Vol. 2 7–124 Replacement intervals consumables: Vol. 2 6–9 scattered toner on printout: Vol. 2 7–110 service provider responsibility: Vol. 2 6–10 stains appear across entire printout: Vol. 2 user responsibility: Vol. 2 6–9 7–114 stains in white background: Vol. 2 7–122 Replacement parts: Vol.
Page 390: Smoke Filter
fuser unit: Vol. 1 4–55 tractor motor: Vol. 1 4–120 fuser unit air filter: Vol. 1 4–65 transfer assembly: Vol. 1 4–66 transfer elevator motor: Vol. 1 4–122 fuser unit cooling fan (FCF): Vol. 1 4–125 transfer/separator charger: Vol. 1 4–49 fuser unit cover glass: Vol.
Page 391: Main Charger
continuous stain (main charger section): Sensor A PCBA Vol. 2 7–106 PNE (paper near–end) sensor assembly, in illustrated parts list: Vol. 2 B–67 flaws on drum are developed: Vol. 2 7–108 waste toner assembly, in illustrated parts periodic toner stains: Vol. 2 7–124 list: Vol.
Page 392: Memory Requirements
Setting up the printer: Vol. 1 5–1 host interfaces: Vol. 2 A–5 memory requirements: Vol. 2 A–6 Setup, debugging port: Vol. 2 7–134 paper: Vol. 2 A–2 Shaft, fulcrum F shaft, in illustrated parts list: performance: Vol. 2 A–4 Vol. 2 B–51 physical: Vol.
Page 393: Controller Module
Surface Voltage Fail (Error 1D): Vol. 2 7–22 continuous ”skipped” area across narrow width of printout: Vol. 2 Surface Voltage too High (Error 19): Vol. 2 7–130 7–22, 7–43 continuous stain (main charger Surface Voltage too Low (Error 1A): Vol. 2 section): Vol.
Page 394: Developing Unit
Timing diagrams Toner low: Vol. 2 7–75 drum cleaning Toner Low (Error 2A): Vol. 2 7–23, 7–75, during mechanism initialization: Vol. 1 7–77 2–43 Toner vacuum cleaner, standard, tools, in postprinting: Vol. 1 2–45 illustrated parts list: Vol. 2 B–83 preprinting: Vol.
Page 395: Troubleshooting Developing Unit Problems
Top of form (TOF) sensor, replacing. See Transport belt, in illustrated parts list: Vol. 2 Paper back–feed sensor (PBFS) B–23 Transport failures Toraysee cloth, tools, in illustrated parts list: Vol. 2 B–83 other failures, troubleshooting: Vol. 2 7–72 troubleshooting: Vol. 2 7–57 Tractor fuser section: Vol.
Page 396 transfer section: Vol. 2 7–63 Verifying printer operation (initial printer setup): Vol. 1 5–44 transport section: Vol. 2 7–69 Troubleshooting procedures: Vol. 2 7–29 Volume Adjustment menu, engine checker: Vol. 2 8–23 Unit interface: Vol. 1 3–8 Unpacking the printer: Vol. 1 5–7 WAITING FOR FILE DOWNLOAD (Error H2): Vol.
Page 398 NL-6600 A IJCHEN ETHERLANDS (31) 24 6489489 HONE: (31) 24 6489499 RINTRONIX A.G. HANGI OUTH TREET 1 HANGI OUTH NDUSTRIAL STATE 486763 INGAPORE (65) 542-0110 HONE: (65) 543-0220 ISIT OUR WEBSITE AT: 706344–001B http://www printronix com VOLUME 1 OF 2...

Printronix L5020 Maintenance Manual

1 Introduction

Introduction

2 Principles of Operation

3 Electrical System and Adjustments

4 Replacement Procedures

5 Setup

100 C Optional Power Paper Stacker

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Summary of Contents for Printronix L5020

Table of Contents