Tektronix Z740/N - Phaser 740 Color Laser Printer Service Manual
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Tektronix Z740/N - Phaser 740 Color Laser Printer Service Manual

Tektronix Z740/N - Phaser 740 Color Laser Printer Service Manual

Service manual
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Download this manual See also: Instruction Manual, User Manual
P H A S E R ® 7 4 0 a n d 7 4 0 L
L A S E R P R I N T E R S
Warning
The following servicing instructions are for
use by qualified service personnel only. To
avoid personal injury, do not perform any
servicing other than that contained in
operating instructions unless you are qualified
to do so.
This printing: May 1999
063-3102-00

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Summary of Contents for Tektronix Z740/N - Phaser 740 Color Laser Printer

  • Page 1 P H A S E R ® 7 4 0 a n d 7 4 0 L L A S E R P R I N T E R S Warning The following servicing instructions are for use by qualified service personnel only. To avoid personal injury, do not perform any servicing other than that contained in operating instructions unless you are qualified...
  • Page 2 © Copyright 1998 by Tektronix, Inc., Wilsonville, Oregon. Printed in the United States of America. All rights reserved. Contents of this publication may not be reproduced in any form without permission of Tektronix, Inc. ® ® ® Tektronix , Phaser , and Made for Each Other are registered trademarks of Tektronix, Inc.

  • Page 3: Users Safety Summary

    Users safety summary Terms in CAUTION Conditions that can result in damage to the product. manual: WARNING Conditions that can result in personal injury or loss of life. Power source: For 110 VAC printers, Do not apply more than 130 volts RMS between the supply conductors or between either supply conductor and ground.
  • Page 4 Symbols as marked on product: DANGER high voltage: Protective ground (earth) terminal: Use caution. Refer to the manual(s) for information: Laser use caution. Refer to the manual(s) for information: WARNING: If the product loses the ground connection, usage of knobs and controls (and other conductive parts) can cause an electrical shock.
  • Page 5 Service safety summary For qualified service personnel only: Refer also to the preceding Users Safety Summary. Do not service alone: Do not perform internal service or adjustment of this product unless another person capable of rendering first aid or resuscitation is present. Use care when servicing with power on: Dangerous voltages may exist at several points in this product.

  • Page 6: Table Of Contents

    Contents General Information The Phaser 740 Color Printer RAM and printer capabilities Print engine assemblies The image processor board Front panel Rear panel Network card LEDs Test print button Health LED Media tray type sensing Specifications Regulatory specifications Error Codes and Messages Error messages Print engine error codes Normal power-up self-tests...
  • Page 7 Jams Paper mis-picks at the paper tray Paper jams midway in the paper feeder Paper jams at the second bias transfer roller Fuser jams Eject jams Multi-purpose tray feed jams Jams in the auto-duplex unit Other problems The printer continuously displays “Initializing” No toner cartridge installed message when it is No fuser installed message when it is No fuser roll installed message when it is...
  • Page 8 Required tools Printing test prints Print service test prints Printing the Configuration Page Printing the demonstration pages Printing the print engine’s test print Printer self-diagnostics Service tests Print engine calibration Printer color correction Manually setting color corrections Cleaning and Maintenance Service preventive maintenance procedure Recommended tools Cleaning...
  • Page 9 Test Prints Wiring Diagram Phaser 740 Color Printer...
  • Page 10 Figures The Phaser 740 Color Printer 1 Print engine major components 6 Print engine components (continued) 7 Print engine sensor, switch and solenoid locations 8 Features of the image processor board 9 The front panel 11 The Phaser 740 rear panel 13 Tray switch sensors and actuators 15 Measuring the DC voltages (test points) 34 Door safety interlock switches 36...
  • Page 11 Tables Installed RAM and printer capabilities 4 Tray switch sensor combinations 14 Physical dimensions 16 Printer clearances 16 Functional specifications 17 Electrical specifications 18 Environmental specifications 18 Print engine service error codes 21 Normal power up error codes 29 Print engine service test descriptions 57 FRU parts list of the printer cabinet 88 FRU part list of the printer cabinet 89 Motors, drive units and fans 90...

  • Page 12: General Information

    General Information This service guide contains information useful for troubleshooting, repairing, ® adjusting, and maintaining a Tektronix Phaser 740 and 740L Color Printer. This manual includes troubleshooting guides, adjustment procedures and a field replaceable units (FRU) list. Topics such as printer theory of operation, detailed removal/replacement procedures, configuration page details, and verifying printer operation are located on the companion Color Printer Service &...

  • Page 13: The Phaser 740 Color Printer

    The Phaser 740 Color Printer The Phaser 740 Color Printer combines a color laser, continuous-tone print engine with an image processor supporting Adobe’s PostScript Level 3 page description language. The image processor features a bi-directional parallel interface and a 10baseT Ethernet port for host communication. Optional network adapter cards to the image processor allow the printer to communicate on networks using LocalTalk, Ethernet 100baseT or Token Ring protocols.
  • Page 14 Print speeds depend on the chosen resolution and selected media. For resolutions of 600 x 600 (standard), in color, the printer prints at 4 pages per minute (ppm) on paper. Monochrome printing (Fast Monochrome) is at 16 ppm on paper. Transparency film printing is always 2 ppm.

  • Page 15: Ram And Printer Capabilities

    RAM and printer capabilities The printer features two DIMM connectors which accept both 16-, 32-, 64-, and 128- Mbytes RAM DIMMs. The printer can use off-the-shelf RAM meeting these specifications: 168-pin DIMM Synchronous DRAM 3.3 volt 9 nsec speed Valid on-board Serial Presence Detect ROM. The Configuration Page lists the amount of installed RAM and the details;...
  • Page 16 Print the Configuration Page and check the item “installed RAM” to see what type of RAM is installed. For example: Installed RAM: 96 Mbytes Mem slot 1: SDRAM/parity/64 MB/KMM366S824AT Mem slot 2: empty This is a list of DRAM SIMMs that are branded for use by Tektronix at the time this guide was published: Size Maker...

  • Page 17: Print Engine Assemblies

    Print engine assemblies Ozone filter Main charger corona unit Toner level sensor board Pre-exposure lamp Laser scanner Imaging unit Paper feeder Black toner cartridge Cyan toner Toner cartridge cartridge selector/paper Yellow toner exit unit Paper tray cartridge (right door) Magenta toner Fuser cartridge...

  • Page 18: Print Engine Components (Continued)

    Toner cartridge Toner Ozone fan drive unit cartridge High voltage Laser driver board motor board Image Power processor supply board unit Engine control board Fuser Cleaning board Interconnect Paper feed motor board Main motor Lower door Temperature/humidity open sensor sensor board 3102-03 Print engine components (continued) Service Guide...

  • Page 19: Print Engine Sensor, Switch And Solenoid Locations

    Accumulator belt Main charge grid Toner level home position sensor (Scorotron charger) sensors sensor (transmitters) Toner level Multi-purpose sensors tray feed (receivers) sensor are mounted inside the toner cartridge driver unit Front right door opened switch Transfer roller position sensor Left door opened switch Fuser-exit...

  • Page 20: The Image Processor Board

    The image processor board DIMM 2 Font ROM DIMM DIMM 1 Boot PostScript code ROM DIMM Network Card Image processor board Real Time clock SCSI riser board 3102-41 Features of the image processor board Service Guide...

  • Page 21: Front Panel

    Front panel These front panel features are found on the printer: A two-line, 24-character LCD and two LEDs Four push buttons The LCD serves two purposes: displaying current image processor and print engine status information and displaying an interactive menu. Status information includes image processor status such as Ready, Receiving data and Printing.

  • Page 22: The Front Panel

    LEDs The Power LED indicates the printer has +5 VDC available for its logic control boards. The Error LED has three meanings: Off indicates that no errors have been detected. On indicates a warning to the user. An explanatory message, such as Low Toner, is displayed on the LCD.

  • Page 23: Rear Panel

    Rear panel Connectors The rear panel of the printer features the host interface connectors: Bi-directional parallel (high-density connector). Twisted Pair10baseT Ethernet connector. RX indicator (green); blinks while the network card is receiving data. The LED is off steady while no data is being received.

  • Page 24: Test Print Button

    The Token Ring network card has two LED indicators: Connection (yellow); off when the printer is not inserted into the Token Ring, blinks while the printer is attempting to insert itself into the Token Ring, on when the printer is properly inserted in the ring. Ring Speed (green);...

  • Page 25: Health Led

    Health LED A health LED indicates the status of the image processor board. The health LED is mounted on the image processor board and is viewable through a small hole in the rear panel. Once the PostScript code is loaded into memory and the image processor is initialized and running, the image processor blinks the LED at a one-second rate.

  • Page 26: Tray Switch Sensors And Actuators

    Sensor actuators Middle Left Right Tray sensors 3102-31 Tray switch sensors and actuators Service Guide...

  • Page 27: Specifications

    Specifications Physical dimensions Dimensions Specification Height: 46.3 cm (18.2 in.) With Lower Tray Assembly: 68.6 cm (27 in.) Width: 50.73 cm (20 in.) With output tray: 78.2 cm (30.8 in.) Depth: 49.2 cm (19.4 in.) Weight: Approximately 47.5 kgs (104.6 lbs.) with consumables installed. Approximately 31.9 kgs (70.2 lbs.) without Lower Tray Assembly.
  • Page 28 Functional specifications Characteristic Specification Printing process Electro-photographic, four color (CMYK) transfer printing Color medium Four toner cartridges each contain one of four colors: cyan, magenta, yellow or black. The toner is a nonmagnetic, monocomponent contact medium. Addressability Standard, Fast Color and Presentation mode: 600 x 600 dots-per-inch text and graphics Premium mode: 1200 x 1200 dpi text and graphics Printing speed...
  • Page 29 Electrical specifications Characteristic Specification Primary line voltages 90 to 132 VAC (115 VAC or 100 VAC nominal); 198 to 264 VAC (220 VAC nominal) Primary voltage frequency 50 to 60 Hz range Power consumption 130 watts (fuser off), 850 watts (fuser on) during Ready state, 950 watts during warm-up, 208 watts during printing, 45 watts during Energy Star state Primary voltage fusing...

  • Page 30: Regulatory Specifications

    Regulatory specifications The printer is a recognized component in conformance with the following regulatory standards: The packaged product meets ASTM D4169-86 and ASTM D4728-87 Transportation Standards. Listed UL 1950 Information Processing and Business Equipment. Certified CSA C22.2 No. 950 Safety of Information Technology Equipment, Including Electrical Business Equipment.
  • Page 31 Phaser 740 Color Printer...

  • Page 32: Error Codes And Messages

    Error Codes and Messages Error messages Generally, the top line of the two-line front panel display indicates the printer’s status, such as Ready, Printing, Busy, or Stopped. The bottom line indicates the function of the three buttons located immediately below the LCD. The front panel also displays error codes when it encounters certain system failures.
  • Page 33 Print engine service error codes Error code Meaning of error code and what to do about it Laser down. 1. Replace the laser motor drive board. 2. Replace the laser scanner. 3. Replace the engine control board. L-sync over time. 1.
  • Page 34 Print engine service error codes Error code Meaning of error code and what to do about it High voltage error. Main charge grid charger 1. Ensure that the imaging unit is properly installed and locked in place. 2. Ensure the main charge grid is properly installed. Ensure the main charge grid is clean with no foreign matter in the area.
  • Page 35 Print engine service error codes Error code Meaning of error code and what to do about it Photoconductive belt out of sync with accumulator belt. 1. Ensure that the imaging unit is properly installed and lock in place. 2. Inspect and clean the transparent plastic cover over the accumulator belt position sensor.
  • Page 36 Print engine service error codes Error code Meaning of error code and what to do about it Paper transfer roller movement error. 1. Inspect the first drive gear (white joint gear) in the paper feeder. Are any of its teeth broke? 2.
  • Page 37 Print engine service error codes Error code Meaning of error code and what to do about it Filter fan error. 1. Is +24 VDC being supplied to the fan from the engine control board’s CN9 pins 1 and 2? If it is, replace the fan. If not, replace the engine control board.
  • Page 38 Print engine service error codes Error code Meaning of error code and what to do about it Main motor lost sync. 1. Is the imaging unit properly installed and locked in position? 2. Do the photoconductive and accumulator belts rotate when driven by the main motor? Manually turn the main drive gears to rotate the belts of the imaging unit.
  • Page 39 Print engine service error codes Error code Meaning of error code and what to do about it Serial time-out error. 1. Check the connection between the image processor board and the engine control board. 2. Replace the image process board. 3.

  • Page 40: Normal Power-Up Self-Tests

    Normal power-up self-tests This test requires no paper or customer interaction. If a problem is encountered with the image processor's expansion memory or other options, then the information is printed on the printer's startup page. Normal power-up tests take slightly longer than one minute to complete.
  • Page 41 Phaser 740 Color Printer...

  • Page 42: Troubleshooting

    Troubleshooting This topic discusses troubleshooting the printer. Troubleshooting is discussed with two approaches: A step-by-step verification procedure that systematically confirms that particular components of the printer are properly functioning until a problem is found. A symptom/cause scheme that lists particular printer failures and error codes and their possible causes.

  • Page 43: Print Engine Troubleshooting

    Print engine troubleshooting This topic is a step-by-step procedure for systematically verifying particular aspects of the printer's operation. Following this procedure should lead to the cause of a printer's failure. Testing the print engine If the printer does not power up, or does not initialize, or the printer initializes but the motors do not run properly, go to the later topic, “Verifying power supply operation”...

  • Page 44: Verifying Printer Operation By Using Its Self-Test Print

    Verifying printer operation by using its self-test print If not already on, turn on the printer. If the printer does not power up, or does not initialize, or the printer initializes but the motors do not run properly, go to the next topic “Verifying power supply operation.” When the Ready message is displayed, press the Menu button to enter the menu.

  • Page 45: Measuring The Dc Voltages (Test Points)

    DC Output: With the VOM set to measure DC voltages, measure voltages at CN301 for +5 VDC and +24 VDC. If the voltage is not correct, replace the power supply. The following illustration shows the test points. Power supply CN 301 Pin 9 - +24 V Pin 8 - GND Pin 7 - GND...

  • Page 46: Inspecting The Power Supply Fuses

    Inspecting the power supply fuses The 115 VAC power supply features a 8 A and a 10 A fuse. The 220 VAC power supply fuse uses a 4 A and a 5 amp fuse. Turn off the printer. Remove the power supply. Remove the power supply cover to access the fuses.

  • Page 47: Door Safety Interlock Switches

    If no motors appear to be at fault, replace the engine control board. Right side door interlock switch Front door interlock switch Left door switch Optional lower tray assembly door switch 3102-07 Door safety interlock switches Phaser 740 Color Printer...

  • Page 48: Testing For A Shorted Motor

    Testing for a shorted motor Remove the cabinet top and rear access panel. Refer to the topic “Wiring Diagram” on page 113 for a diagram that locates each connector. Disconnect the motor harnesses. Turn on the printer again to see if it overloads now that the motors are disconnected from the engine driver board.

  • Page 49: Multiple-Sheet Pick

    Multiple-sheet pick Is the paper in good condition and appropriate for a laser printer? Quality office laser printer paper works best. Is the printer printing within its environmental specifications? Ensure the corners or the paper are under the tabs in the corners of the tray. Clean the pick rollers.

  • Page 50: No Paper Feeder Installed

    Ensure that the wiring harness leading from the paper feeder to the engine control board is properly installed in connector CN20. Check the wiring harness for defects. Replace the engine control board. No imaging unit installed Ensure that the imaging unit is properly installed and locked in place. Check the main charge grid boss on the rear of the charger to ensure it is not broken.

  • Page 51: Paper Jams Midway In The Paper Feeder

    If the pick roller does rotate, is the pick roller correctly installed (flat side of the cam-shaped pick rollers face down prior to picking a sheet of paper)? Does the pick solenoid work properly? It must energize for the pick roller to be engaged and rotate.

  • Page 52: Fuser Jams

    Check the spring pressure at each end of the aligning rollers. Lifting each end of the roller with a tension gauge should reveal a measurement of about 1 kg (2.2 lbs). Check the left side door for burrs or foreign obstructions that could block the movement of a sheet of paper.

  • Page 53: Eject Jams

    Eject jams Is the paper in good condition and appropriate for a laser printer? Is the paper curling? Is the printer printing within its environmental specifications? Is the jam caused by a heavy, stiff paper being printed in face-down mode? In such cases, face-up mode or a lighter grade of paper should be used.

  • Page 54: Other Problems

    Clean the rollers inside the auto-duplex unit. Inspect the duplex unit for foreign objects such as a shard of paper. Does the auto-duplex unit’s clutch operate correctly? Refer to “Service tests” on page 57. Inspect the auto-duplex unit’s electrical connector for damage. Replace the auto-duplex unit.

  • Page 55: No Fuser Installed Message When It Is

    No fuser installed message when it is Ensure that the fuser is correctly installed. Check the fuser’s connection and wiring. Check the wiring harness leading to the fuser power connector. Replace the fuser. Replace the engine control board. No fuser roll installed message when it is Ensure that the fuser roll is correctly installed.

  • Page 56: Left-Side Door Open Message When It Is Not

    Left-side door open message when it is not The procedure for troubleshooting this problem applies to the Lower Tray Assembly as well. Is the left door open switch, located in the lower-left back corner of the printer, properly in place? Does closing the left door actuate the left door open switch? Is the left door properly in place? Replace the door if it does not operate correctly.

  • Page 57: High Voltage Error

    High voltage error Replace the high voltage board. Inspect the high-voltage wiring. Replace the imaging unit and check the printer for proper operation. Sequentially replace each toner cartridge and check the printer for proper operation. Ensure that excessive conductive grease has not migrated and shorted a high-voltage contact to ground on the second bias transfer roller.

  • Page 58: Printing And Print Quality Problems

    Printing and print quality problems Required tools #1 Phillips screwdriver Conductive grease Volt-ohm - meter (VOM) Ruler Note Refer to the later topic, “Test Prints” on page 103 for many examples of print defects. Blank print Press, and hold for 4 seconds, the rear panel Test Print button to determine if the print engine will image at all.

  • Page 59: Missing Primary Color

    Missing primary color Replace the toner cartridge of the missing color. Determine if the cartridge selector is pushing the toner cartridges into contact with the photoconductive drum. Check the wiring harness leading from the cartridge selector/eject unit to CN308 of the engine control board. Replace the toner cartridge drive unit.

  • Page 60: Repeated Spots Or Lines On Print In-Line With Each Other

    Repeated spots or lines on print in-line with each other Measure the spacing between the spots. The distance between the repeating spots indicates the source of the problem. Thin horizontal lines, depending on problem, the distance between lines may range from 1.5 mm (1/20th inch) between each line to 103 mm (4 in.) between each line.

  • Page 61: Vertical Lines In The Print

    Vertical lines in the print Inspect the path the laser beam travels for foreign matter that could block the beam from striking the photoconductive belt. Check the main charger wire and grid. White streaks are caused by a dirty grid. Black streaks are caused by a dirty wire. If the line is colored, one toner cartridge may not be outputting toner correctly.

  • Page 62: Ghosting

    Ghosting Ghosting with some images is unavoidable because of the color structure of the images. If a color is used at one part of the image area and the same color is used again at a later area, it is very possible to get ghosting of the first image into the second image area after one revolution of the toner cartridge developer roller.

  • Page 63: No Printing On Edge Of Print

    No printing on edge of print If one primary color is missing, replace that color’s toner cartridge. Check that each toner cartridge moves forward smoothly toward the imaging unit. Also inspect the two metal pads on the ends of the toner cartridge that the toner cartridge selector cams push against.

  • Page 64: Macintosh Printing Problems

    Macintosh printing problems Image never prints The printer indicates it is receiving data, but nothing comes out of printer or goes back to Ready mode without printing an image. Make sure that the correct Phaser 740 icon was selected in the Chooser. Try printing the job again.

  • Page 65: Printer Isn't In The Chooser

    Make sure that the tray width sensor is working correctly. Printer isn’t in the Chooser Ensure that the printer is turned on and the rear panel health light is flashing at a regular rate. Check the Network or AppleTalk control panel to ensure the proper network or zone is selected.

  • Page 66: Service Tests And Adjustments

    Service Tests and Adjustments This topic discusses using the front panel’s interactive mode to review and change the printer’s operation. It also contains the procedures to test and calibrate the printer after you replace key Field Replaceable Units and to evaluate the printer's functionality.

  • Page 67: Printing Test Prints

    Printing test prints The prints printed via the front panel are generated by the image processor. While the printer is idle you can use the front panel to print an image stored in the image processor such as the Configuration Page. Print service test prints The service prints allow you to evaluate the printer’s print quality.

  • Page 68: Printer Self-Diagnostics

    Printer self-diagnostics The printer’s image processor features four types of self-test modes. The type of self- tests run depend upon which front panel buttons are pressed while the printer is turned on. The button combinations are listed here. Turning on the printer or restarting the printer remotely executes normal image processor power-up self-tests and then, if the tests pass, proceed to launch its PostScript interpreter.
  • Page 69 Engine Set Margins Top Margin Front Margin Back Left Margin Paper Path Top Tray Middle Tray Multi-purpose Tray Bottom Tray Sensors Fr./Rt. Door Top Tray Paper Left Access Door Top Tray Sw1 Lower Feeder Door Top Tray Sw 2 Fuser Installed Top Tray Sw3 Fuser Roll Installed Middle Tray Paper...
  • Page 70 Engine (cont.) Solenoids Transfer Roller Solenoid Cleaning Blade Solenoid Face Up/down Solenoid Top Pick Solenoid Middle Pick Solenoid Bottom Pick Solenoid Fuser Roll Solenoid Auto Duplex Unit Bypass Solenoid Command Engine Main Motor On/off Yellow Roller On/off Paper Feed Motor On/off Cyan Roller On/off Cartridge Motor On/off Magent Roller On/off...

  • Page 71: Print Engine Calibration

    Print engine calibration Generally, no print engine calibration is required. Usually, if you note a print defect, replacing a toner cartridge, the imaging unit or the transfer roller (or perhaps the paper feeder) corrects the problem. Printer color correction Correcting printer colors is accomplished manually. You use front panel menus to make the corrections.

  • Page 72: Manual Color Correction Reference Print

    Color Reference Page Cyan Magenta Yellow Black 9698-18 Manual color correction reference print Overlay and compare the pre-printed primary Color Density Samples in the Phaser 740 Color Printer User Guide to the selected colors on the midline of the print. If any primary color does not match, overlay and compare to an alternate color.
  • Page 73 Phaser 740 Color Printer...

  • Page 74: Cleaning And Maintenance

    Cleaning and Maintenance Service preventive maintenance procedure Whenever you check, service, or repair a printer, you should perform the following procedures. Cleaning the printer, as outlined in the following steps, assures proper operation of the printer and reduces the probability of having to service the printer in the future.

  • Page 75: Recommended Tools

    Recommended tools Toner vacuum cleaner Suction bulb (air blower) Cleaning water Lint-free wipes Cotton swabs Imaging unit cover Isopropyl alcohol (greater than 90% pure) Cleaning Turn off the printer. Remove the imaging unit and immediately cover it to protect it from the light.

  • Page 76: Lubrication

    Carefully clean the area around the second bias transfer roller’s cleaning roller for impacted toner. Remove the second bias transfer roller Tap on the cleaning roll cover to knock the toner loose from that area. Vacuum the toner. Lubrication Molybdenum-based (brown) grease, part number 006-7436-00. For all metal-to-metal, metal-to-plastic, and plastic-to-plastic gears.
  • Page 77 Phaser 740 Color Printer...

  • Page 78: Resetting Nvram

    Resetting NVRAM Resetting NVRAM returns all the image processor's NVRAM-stored parameters to their factory defaults except the print counts and the Adobe firmware serial number. To reset the image processor to its factory default values, follow this procedure: Turn the printer off. Press and hold the front panel Buttons 1 (Exit) and 4.
  • Page 79 Phaser 740 Color Printer...

  • Page 80: Key Fru Disassembly

    Key FRU Disassembly This topic illustrates how to remove and replace key printer Field Replaceable Units (FRUs). Refer to the later topic “FRU List” on page 87 for a list of the printer’s FRUs. For more detailed removal/replacement procedures refer to the Phaser 740 Service CD- ROM.
  • Page 81 Toner level sensor board Right side covers Rear Front Upper front Bottom front cover Front door cover Lower (lift printer to (lift printer remove) to remove) 740-7-2 Removing cabinet covers Phaser 740 Color Printer...

  • Page 82: Emi Shields

    EMI shields EMI shield Interconnect wiring shield 740-7-3 Removing the EMI shields Note Unplug the engine-to-image processor cable from the engine control board. Service Guide...

  • Page 83: Cartridge Selector/Eject Unit (Right Door)

    Cartridge selector/eject unit (right door) Disconnect the cartridge selector/eject unit’s wiring harness. Counting from the rear of the shaft, remove the third E-ring from the cartridge selector/eject unit’s shaft. Remove the E-ring and keyed bushings from each end of the cartridge selector/eject unit’s shaft.

  • Page 84: Removing The Cartridge Selector/Eject Unit

    Cartridge selector/ eject unit (right door) Remove E-ring and bushing E-ring Keyed bushing Frame Spring Keyed Washer Washer Remove E-ring Disconnect wiring harness Washer Keyed Washer Spring Frame Remove E-ring Keyed bushing and bushing E-ring 740-7-7 Removing the cartridge selector/eject unit Service Guide...

  • Page 85: Paper Feeder And Tray Sensor Board

    Paper feeder and tray sensor board Paper tray sensor board Paper feeder Back-out stop screws 740-7-4 Removing the paper feeder Phaser 740 Color Printer...

  • Page 86: Multi-Purpose Tray Pick Roller

    Multi-purpose tray pick roller The multi-purpose pick roller should be replaced whenever the cork separator pad is replaced. The expected life of each is about 30k prints. With a small, narrow, flat-blade screwdriver, carefully release the snap-fit cover over the multi-purpose tray pick roller. Small access holes allow you to access the five retaining latches.

  • Page 87: Cork Separator Pad

    Cork separator pad The cork separator pad should be replaced whenever the multi-purpose pick roller is replaced. The life is about 30k prints. Grasp the paper guide and push in and down to the bottom of it travel, then tilt it forward. With a small, narrow, flat-blade screwdriver, reach behind the cork separator pad and free the two retaining hooks hold the separator pad in place.

  • Page 88: Laser Scanner

    Laser scanner Shield Remove three Laser motor screws driver board Laser Disconnect scanner wiring harnesses Separate these two wiring harnesses to minimize possible crosstalk 740-7-8 Removing the laser scanner and driver board Service Guide...

  • Page 89: Power Supply

    Power supply Power supply Disconnect wiring harnesses 740-7-9 Removing the power supply Phaser 740 Color Printer...

  • Page 90: Main Motor

    Main motor Paper feed motor Toner cartridge drive motor Cleaning board Toner cartridge drive motor Paper feed motor Main motor Removing the main motor, paper-feed motor, toner cartridge drive motor and cleaning board Service Guide...

  • Page 91: Toner Cartridge Drive Unit

    Toner cartridge drive unit Accumulator belt home position sensor Left door open interlock switch Toner cartridge drive unit Left door-opened Home position interlock switch sensor Interlock switch cover 740-7-13 Removing the toner cartridge drive unit, home position sensor and the left door interlock switch Phaser 740 Color Printer...

  • Page 92: Temperature/Humidity Sensor Board

    Temperature/humidity sensor board Housing Lower rear Temperature/humidity cover sensor board 740-7-14 Removing the temperature/humidity sensor board Pre-exposure lamp Pre-transfer lamp Pre-exposure lamp Pre-transfer lamp 740-7-15 Removing the pre-exposure lamp and pre-transfer lamp Service Guide...

  • Page 93: Gear Train

    Gear train Gear train Gear train retainer Frame cross member 740-7-18 Removing the gear train Phaser 740 Color Printer...

  • Page 94: Tray Guides

    Tray guides Tray guides 740-7-17 Removing the tray guides Service Guide...

  • Page 95: Engine Control Board

    Engine control board Engine control board bracket Engine control board IC 4 740-7-11 Removing the engine control board Note Swap NVRAM IC4. IC4 stores print engine parameters and all consumable life counts and the engine print count. Connector CN28, next to IC4 has no corresponding plug. Phaser 740 Color Printer...

  • Page 96: High-Voltage Board

    High-voltage board Warning The edges on the inside of the card cage are ragged and sharp and can cut you. Caution When installing the wiring harness retainer, be careful not to press the wiring harness against the tip of a near by screw which will short the harness.

  • Page 97: Image Processor Board

    Image processor board Boot Image Real processor Time board clock 740-7-20 Removing the image processor board Swap components. If you are replacing the image processor board, exchange: The Boot ROM (PLCC), requires using a PLCC extraction tool (003-1633-00) The NVRAM chip (DIP) The Real Time Clock module The components contains important customer-created parameters.

  • Page 98: Fru List

    FRU List This topic provides a list of field replaceable units for the printer. Changes to Tektronix instruments are made to accommodate improved components as they become available. It is important when ordering parts to include the following information: Component's part number. Instrument type or number.

  • Page 99: Cabinet Frus

    Table 1 FRU parts list of the printer cabinet Fig 1 Part Serial number Name and description parts number Effective Discont’d 118-9893-00 Front door with hinges 118-9892-00 Upper front cover (operation panel) w/display board 118-9537-00 Right side cover rear 118-9208-00 Right side cover front 118-9894-00 Right side cover lower...
  • Page 100 Table 2 FRU part list of the printer cabinet Fig 2 Part Serial number Name and description parts number Effective Discont’d 118-9891-00 Lower rear cover 118-9889-00 Upper rear cover (110 VAC) 118-9890-00 Upper rear cover (220 VAC) 118-9888-00 Top cover with logos 118-9979-00 Left side cover 118-9522-00...
  • Page 101 Table 3 Motors, drive units and fans Fig 3 Part Serial number Name and description parts number Effective Discont’d 118-9897-00 Toner cartridge selector/paper-eject unit 118-9551-00 Fan, power supply 118-9905-00 Toner cartridge drive motor 118-9514-00 Toner cartridge drive unit 118-9524-00 Fan, ozone filter 118-9553-00 Gear kit, Main motor drive Motor compound gear...
  • Page 102 3102-37 Figure 3 Motor and fan FRUs Service Guide...
  • Page 103 Table 4 Sensors, switches and flags Fig 4 Part Serial number Name and description parts number Effective Discont’d 118-9552-00 Switch, front/right door open sensor 118-9547-00 Toner level sensor board 118-9558-00 Paper feed flag kit Paper tray empty Multi-purpose tray entrance flag Jam at A flag Output tray full flag 118-9913-00...
  • Page 104 3102-40 Figure 4 Sensor, switch and flag FRUs Service Guide...

  • Page 105: Circuit Board And Electronics

    Table 5 Circuit board and electronics Fig 5 Part Serial number Name and description parts number Effective Discont’d 118-9978-00 Laser driver board 118-9898-00 High-voltage board 671-4380-80 Image processing board 156-4758-10 16-Mbyte RAM DIMM 156-4800-10 32-Mbyte RAM DIMM 156-4811-10 64-Mbyte RAM DIMM 156-4780-10 128-Mbyte RAM DIMM 671-4519-00...

  • Page 106: Circuit Board And Electronic Frus

    3102-38 Figure 5 Circuit board and electronic FRUs Service Guide...

  • Page 107: Imaging And Paper Feed Components

    Table 6 Imaging and paper feed components Fig 6 Part Serial number Name and description parts number Effective Discont’d 118-9901-00 Laser scanner unit 118-9546-00 Pre-transfer lamp 118-9549-00 Pre-exposure erase lamp 118-9895-00 Paper feeder 118-9896-00 Multi-purpose tray kit pick roller pad spring pick pad 118-9563-00 D-roller, paper feed...

  • Page 108: Imaging And Paper Feed Component Frus

    3102-39 Figure 6 Imaging and paper feed component FRUs Service Guide...

  • Page 109: Supplies And Accessories

    Table 7 Kits and other hardware Fig 1 Part Serial number Name and description parts number Effective Discont’d 118-9560-00 Spring, toner cartridge, front and rear 2 rear springs (thick-CMYK) 1 front spring (thin-black only) 2 front springs (thin-CMY 118-9520-00 Hardware kit Screws E-rings C-rings...

  • Page 110: Supplies And Accessories

    Supplies and accessories Part Serial number Name and description number Effective Discont’d Supply 436-0284-01 Transparency tray, Letter-size Supply 436-0285-01 Transparency tray, A4-size Supply 016-1654-00 Transparency, Letter-size, 50 sheets Supply 016-1655-00 Transparency, Metric-size, 50 sheets Supply 016-1368-00 Paper, A-size, 500 sheets Supply 016-1369-00 Paper, A4-size, 500 sheets Supply 016-1704-00...
  • Page 111 Supplies and accessories Part Serial number Name and description number Effective Discont’d 063-3116-20 PhaserShare Setup Guide (Italian) 063-3116-30 PhaserShare Setup Guide (German) 063-3116-40 PhaserShare Setup Guide (Spanish) 063-3102-00 Phaser 740 Service Quick Reference Guide 063-3079-00 CD-ROM, English 063-3079-10 CD-ROM, French 063-3079-20 CD-ROM, Italian 063-3079-30...
  • Page 112 Supplies and accessories Part Serial number Name and description number Effective Discont’d 003-0619-00 DIP IC removal tool 003-1633-00 PLCC IC removal tool 013-0297-00 SCSI cable adapter, 50-pin to SCSI II 103-0030-00 Adapter, T-Connector, BNC 011-0123-00 Coaxial Term. 50 ohms, BNC 161-0066-00 Power cord, domestic 016-1710-00...
  • Page 113 Phaser 740 Color Printer...

  • Page 114: Test Prints

    Test Prints This appendix illustrates the test prints produced by the print engine. It also illustrates a number of defective prints and the reason for the defects. The topic “Printing and print quality problems” on page 47 discusses solutions to the problems shown in this appendix.
  • Page 115 Single color mottled or with non-uniform density streaks. If a single color displays a mottled appearance or if a single color shows many vertical streaks of varying densities, then that color’s toner cartridge is running of toner. Replace the cartridge. Phaser 740 Color Printer...
  • Page 116 Vertical line or scratch in print, single color If the scratch is of one missing primary color, then the trouble can usually be traced to a scratch in the developer roller of the missing toner’s toner cartridge. No toner is transferred from the developer roller to the photoconductive belt at the defect point.
  • Page 117 Dark vertical line in print, single color If the line is of one primary color, then the trouble can usually be traced to a defect in the color’s toner cartridge. Too much toner is transferred from the developer roller to the photoconductive belt at the defect point.
  • Page 118 Single light, horizontal line in all the prints This is probably caused by a defective photoconductive belt onto which toner will not transfer. Replace the imaging unit. Large, random light smudges Spots such as those illustrated are caused by fingerprints on the photoconductive or accumulator belt.
  • Page 119 One or more dark vertical line in all colors This can often be traced to a dirty scorotron charger (main charger) corona wire. Contamination (dust or toner) interferes with the flow of electrons from the wire to the photoconductive drum. Toner is then transferred to the area of low electron charge and consequently to the accumulator belt and finally the print.
  • Page 120 Dark, vertical streaks and smears on the entire page This is usually due to the accumulator belt toner waste bin being filled and spilling out on the belt. The spilled toner is then being transferred to the print. Most prominent in the middle of the print and in the yellow band.
  • Page 121 Single white spot appear in the same place on the print This indicates a bad spot has developed on the imaging unit’s photoconductive belt which will not transfer toner. The imaging unit must be replaced. If the spot appears to migrate vertically from print to print then the defect is on the imaging unit’s accumulator belt.
  • Page 122 Interpreting Service Print 2 Service Print 2 is useful for evaluating the condition of the imaging unit. Three prints are made: a 600 dpi print, a solid red fill print, and a 1200 dpi print. With a properly functioning imaging unit and printer, you should see the following: Diagonal lines.
  • Page 123 Interpreting Service Print 2’s solid red fill print The second of the three prints made when Service Print 2 is selected is a solid red fill. Its purpose is to reveal repeating defects that can be traced back to defects on the printers belts or rollers.

  • Page 124: Wiring Diagram

    Wiring Diagram Laser driver CN 1 CN 2 Front panel CN 1 CN 501 CN 502 Laser Interconnect board scanner CN 4 CN 29 CN 8 CN 2 J490 Toner cartridge CN 7 CN 1 SCSI J711 sub bias board J712 Image CN 11...
  • Page 125 Phaser 740 Color Printer...
  • Page 126 Service Guide...
  • Page 127 Phaser 740 Color Printer...

This manual is also suitable for:

Phaser 740Phaser 740l

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