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PHASER® 740 and 750 LASER PRINTERS
Service Quick Reference Guide
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: Febuary 2000 063-3102-01
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. TekColorTM, PhaserShareTM, PhaserMatchTM, PhaserLinkTM, FinepointTM and PhaserPrintTM are trademarks of Tektronix, Inc. RealSUPPORTSM and TekColor CareSM are service marks of Tektronix, Inc. Other marks are trademarks or registered trademarks of the companies with which they are associated.
TE/mq/mm
Users safety summary
Terms in manual:
CAUTION WARNING Conditions that can result in damage to the product. 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. Use only the specified power cord and connector. For 220 VAC printers, Do not apply more than 250 volts RMS between the supply conductors or between either supply conductor and ground. Use only the specified power cord and connector.Refer to a qualified service technician for changes to the cord or connector.
Operation of product: Avoid electric shock by contacting a qualified service technician to replace fuses inside the product. Do not operate without the covers and panels properly installed. Do not operate in an atmosphere of explosive gases.
WARNING Turning the power off using the On/Off switch does not de-energize the printer. You must remove the power cord to disconnect the printer from the mains. Keep the power cord accessible for removal in case of an emergency.
Safety instructions: Read all installation instructions carefully before you plug the product into a power source. Terms on product:
CAUTION A personal injury hazard exists that may not be apparent. For example, a panel may cover the hazardous area. Also applies to a hazard to property including the product itself. DANGER A personal injury hazard exists in the area where you see the sign.
Care of product: Disconnect the power plug by pulling the plug, not the cord. Disconnect the power plug if the power cord or plug is frayed or otherwise damaged, if you spill anything into the case, if product is exposed to any excess moisture, if product is dropped or damaged, if you suspect that the product needs servicing or repair, and whenever you clean the product. Ground the product: Plug the three-wire power cord (with grounding prong) into
grounded AC outlets only. If necessary, contact a licensed electrician to install a properly grounded outlet.
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. Electrical product may be hazardous if misused.
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. To avoid personal injury, do not touch exposed connections and components while power is on.
Disconnect power before removing the power supply shield, soldering, or replacing components.
Do not wear jewelry: Remove jewelry prior to servicing. Rings, necklaces, and other
metallic objects could come into contact with dangerous voltages and currents.
Power source: This product is intended to operate from a power source that will not
apply more than 250 volts rms between the supply conductors or between either supply conductor and ground. A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation. This product is certified under IEC 825 as a Class 1 Laser Product.
DANGER:
Invisible laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM.
CAUTION:
Invisible laser radiation when open and interlocks defeated. AVOID DIRECT EXPOSURE TO BEAM.
VORSICHT:
Unsichtbare Laserstrahlung, wenn Abdeckung geöffnet und Sicherheitsverriegelung überbrückt. NICH DEM STRAHL AUSSETZEN.
ATTENTION:
Rayonnement laser invisible dangereux en cas d'ouverture et lorsque la sécurité est neutralisée. EXPOSITION DANGEREUSE AU FAISCEAU.
Class 3B
PELIGRO:
Cuando se abre y se invalida el bloqueo, se producen radiaciones invisibles de láser. EVITESE LA ´ EXPOSICION DIRECTA A TALES RAYOS.
VARNING:
Osynlig laserstrálning när denna del är öppnad och spärrar är urkopplade. STRÅLEN ÄR FARLIG.
VAROI:
Näkymätön avattaessa ja suojalukitus ohitettaessa olet alttiina lasersäteilylle. ÄLÄ KATSO SÄTEESEN.
VARNING:
Osynlig laserstrálning när denna del är öppnad och spärrar är urkopplade. BETRAKTA EJ STRÅLEN.
ADVARSEL:
Usynlig laserstràling ved abning når sikkerhedsafbrydere er ude af funktion. UNDGÅ UD ÆTTELSE FOR STRÅLING.
ADVARSEL:
Usynlig laserstraling nar deksel åpnes og sikkerhedslas brytes. UNNGÅ EKSPONERING FOR STRÅLEN.
PJQT4521ZA
9008-78
Contents
General Information 1
The Phaser 740 Color Printer 2 The Phaser 750 Color Printer 4 Phaser 740 printer RAM and printer capabilities Phaser 750 printer RAM and printer capabilities Print engine assemblies 10 The image processor board 13 Phaser 740 13 Phaser 750 14 Front panel 15 Rear panel 17 Test print button 17 Network card LEDs 18 Health LED (Phaser 740 only) 20 Media tray type sensing 20 Difference between Phaser 740 and 750 22 Specifications 23 Regulatory specifications 26 6 8
Error Codes and Messages
27
Error messages 27 Print engine error codes 27 Normal power-up self-tests
35
Troubleshooting
37
System power-up sequence 37 Print engine troubleshooting 38 Testing the print engine 38 Verifying printer operation by using its self-test print 39 Verifying power supply operation 39 Measuring power supply voltages 39 Inspecting the power supply fuses 41 Safety interlocks 41 Testing for a shorted motor 42 Media jams and the paper path 43 Media-based problems 43 Media problems 43 Multiple-sheet pick 44 The media skews passing through the paper path 44 Paper tray indicates empty when it is not 44 No paper feeder installed 45 No imaging unit installed 45
Service Guide
vii
Jams 46 Wrong media 46 Paper mis-picks at the paper tray 46 Paper jams midway in the paper feeder 46 Paper jams at the second bias transfer roller 47 Fuser jams 48 Eject jams 48 Multi-purpose tray feed jams 49 Jams in the duplex unit 49 Other problems 50 The printer continuously displays "Initializing" 50 No toner cartridge installed message when it is 50 No fuser installed message when it is 50 No fuser roll installed message when it is 51 Front door open when it is closed 51 Left-side door open message when it is not 51 High temperature error 52 Low temperature error 52 High voltage error 52 Thermistor open error 52 Front panel cycling between READY and WARMING UP 53 Erratic printer behavior 53 Installed RAM not recognized 53 Printing and print quality problems 54 Blank print 56 All-black print 56 Single color mottled or with non-uniform density streaks 57 Dark vertical line in print, single color 57 Vertical line in print, all colors 57 Vertical line or scratch in print, single color 58 Vertical line or scratch in print, all colors 58 Small, repeating light dot in one color in-line with each other 59 Single light, horizontal line in all the prints 60 Large, random light smudges 60 One or more dark vertical line in all colors 61 Dark, irregular, vertical streaks and smears on the entire page 62 One primary color faded or pale OR a single color has a dark vertical streak 62 Light, faded, pale prints 63 Single white spot appear in the same place on the print 64 Contamination of one color by another 64 Missing primary color 65 Mis-transfer, missing portions of toner 65 Dirty background 66 Stains on the back of the print 66 Ghosting 66 Unfused or partially fused printing 66 Image is skewed on the paper 67 No printing on edge of print 67 Image is not centered on the print when it should be 67
viii
Phaser 740 and 750 Color Printers
The print is wrinkled 68 Macintosh printing problems 69 Image never prints 69 Image is rotated 90 degrees 69 Image prints in black-and-white Printer isn't in the Chooser 70 Windows printing problems 70 Image never prints 70 Interpreting the Supplies Page 71 Life remaining gauges 71 Date installed 71 Toner coverage 71 Print counts 71 Print count conversions 72
69
Service Tests and Adjustments
73
Required tools 73 Printing test prints on the Phaser 740 printer 74 Print service test prints 74 Printing the Configuration Page 74 Printing the demonstration pages 74 Printing the print engine's test print 74 Printing test prints on the Phaser 750 printer 75 Printing the Diagnostic Test Pages and Solid Fill Test Page Printing the Configuration Page 75 Printing the demonstration pages 75 Printing the print engine's test print 75 Embedded pages (Phaser 750 printer only) 76 Printer self-diagnostics 77 Phaser 740 service tests 77 Phaser 750 service tests 80 Print engine calibration 84 Printer color correction 84 Manually setting color corrections 84 Phaser 740 84 Phaser 750 84 Calibrate for paper (Phaser 750 only) 86
75
Cleaning and Maintenance
87
87
Service preventive maintenance procedure Recommended tools 88 Cleaning 88 Lubrication 89
Service Guide
ix
Resetting NVRAM
91
91 91
Phaser 740 printer Phaser 750 printer
Key FRU Disassembly
93
Printer cabinet 93 EMI shields 95 Cartridge selector/eject unit (right door) 96 Paper feeder and tray sensor board 98 Multi-purpose tray pick roller 99 Cork separator pad 100 Laser scanner 101 Power supply 102 Main motor 103 Paper feed motor 103 Toner cartridge drive motor 103 Cleaning board 103 Toner cartridge drive unit 104 Accumulator belt home position sensor 104 Left door open interlock switch 104 Temperature/humidity sensor board 105 Pre-exposure lamp 105 Pre-transfer lamp 105 Paper feed/fuser gear train 106 Tray guides 107 Engine control board 108 High-voltage board 109 Image processor board 110 Phaser 740 110 Phaser 750 111
FRU List
113
125
Supplies and accessories
Test Prints
131
131 132
Phaser 740 printer test prints Phaser 750 printer test prints
Wiring Diagram
135
x
Phaser 740 and 750 Color Printers
Figures
The Phaser 740/750 Color Printer 1 Print engine major components 10 Print engine components (continued) 11 Print engine sensor, switch and solenoid locations 12 Features of the image processor board 13 Features of the image processor board 14 The front panel 16 The Phaser 740 rear panel 19 The Phaser 750 rear panel 19 Tray switch sensors and actuators 21 Measuring the DC voltages (test points) 40 Door safety interlock switches 42 Troubleshooting print quality problems 54 Manual color correction reference print 85 The Calibrate for Paper test page 86 Removing cabinet covers 93 Removing cabinet covers 94 Removing the EMI shields 95 Removing the cartridge selector/eject unit 97 Removing the paper feeder 98 Removing the multi-purpose tray pick roller 99 Removing the cork separator pad 100 Removing the laser scanner and driver board 101 Removing the power supply 102 Removing the main motor, paper-feed motor, toner cartridge drive motor and cleaning board 103 Removing the toner cartridge drive unit, home position sensor and the left door interlock switch 104 Removing the temperature/humidity sensor board 105 Removing the pre-exposure lamp and pre-transfer lamp 105 Removing the gear train 106 Removing the tray guides 107 Removing the engine control board 108 Removing the high-voltage board 109 Removing the image processor board 110 Removing the image processor board 111 Cabinet FRUs 114 Cabinet FRUs 115 Motor and fan FRUs 117 Sensor, switch and flag FRUs 119
Service Guide
xi
Circuit board and electronic FRUs 121 Imaging and paper feed component FRUs 123 Wiring diagram 135
Tables
Installed RAM and printer capabilities 6 Installed RAM and printer capabilities 8 Tray switch sensor combinations 20 Summary of differences between Phaser 740 and Phaser 750 22 Physical dimensions 23 Printer clearances 23 Functional specifications 24 Electrical specifications 25 Environmental specifications 25 Print engine service error codes 27 Normal power up error codes 35 Phaser 740 print engine service test descriptions 77 Phaser 750 print engine service test descriptions 80 FRU parts list of the printer cabinet 114 FRU part list of the printer cabinet 115 Motors, drive units and fans 116 Sensors, switches and flags 118 Circuit board and electronics 120 Imaging and paper feed components 122 Kits and other hardware 124 Common supplies and accessories 125 Phaser 740 Supplies and accessories 125 Phaser 750 Supplies and accessories 128
xii
Phaser 740 and 750 Color Printers
General Information
This service guide contains information useful for troubleshooting, repairing, adjusting, and maintaining Tektronix Phaser® 740, 740L, and 750 Color Printers. 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 & Support Resources CD-ROM. To ensure a complete understanding of the product, we recommend participation in Phaser 740 and 750 printer service training.
A4
R PE PA
3102-01
The Phaser 740/750 Color Printer
Service Guide
1
The Phaser 740 Color Printer
The Phaser 740 Color Printer combines a color laser 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. The Ethernet network card supports EtherTalk 100baseT, Novell and TCP/IP. With the Token Ring network card, the printer supports Token Ring protocols. With 32 Mbytes of RAM installed, the printer supports the color PCL5C printer language too. The printer is available in four configurations:
s
The Phaser 740L is a monochrome version of the printer which can easily be customer-upgraded to be a color printer. It prints at a resolution of 600 x 600. It is equipped with 16 Mbytes of RAM which can be supplemented with an additional RAM DIMM. The printer contains 136 standard, built-in fonts. The Phaser 740L is identical to the Phaser 740 except is set to only use a black toner cartridge. It features a removable plate which blocks out the locations of the color cartridges. The Phaser 740 Base comes standard with 32 Mbytes of RAM which can be supplemented with one or two additional 16-, 32-, 64- and 128-Mbyte RAM DIMMs; maximum usable capacity is 80 Mbytes. The printer contains 136 standard, built-in fonts. The printer contains 136 standard, built-in fonts. The Phaser 740 Base prints at a resolution of 600 x 600 dots-per-inch. The Phaser 740 Plus includes 32 Mbytes of additional memory (64 Mbytes total) and a SCSI interface board. The presence of the SCSI board (and the extra memory) enables the printer to print at higher resolutions 1200 x 1200 (Premium mode) dots-per-inch and also support image pipelining for greater throughput, a print collation mode, and a "check print before proceeding with job" mode. The printer contains 136 standard, built-in fonts. The Phaser 740 Extended (a factory-only option) features a different ROM SIMM than the other printers. It includes 128 Mbytes total memory, SCSI port, 1200 x 1200 color printing, check print mode, print job collation (requires hard drive), copystation support and print pipelining.
s
s
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The color printers support a 5.3 page-per-minute, composite-black printing "Fast Color" mode which prints at 600 x 600 dpi using three passes, cyan, magenta and yellow, to produce an image instead of the usual four passes, cyan, magenta, yellow and black. Each printer also features "Presentation" mode printing in which a paper print is printed with the color settings of a transparency print. Presentation mode produces the smoothest and brightest large-area fills. The printer prints in monochrome at 16 prints-per-minute.
2
Phaser 740 and 750 Color Printers
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. For 1200 x 1200 (premium) dpi color printing, the printer color prints at 2 ppm. Monochrome printing is at 8 ppm. The printer prints 600 x 600 dpi, composite black (CMY) draft prints at a rate of 5.3 pages-per-minute. The plus and extended features option includes a SCSI-compatible interface to connect to an external hard disk drive for additional font storage. The hard disk drive is also required for print collation of multiple copy multi-page prints. A copy unit can also be connected to the printer's SCSI port to give the printer the ability to optically copy color images. An factory-only, internal IDE hard drive can be installed in the printer in place of the network card. The printers support printing on A-, A4- and Legal-sized paper and transparency film from separate A or A4- or Legal-size trays. An optional two-tray second feeder (called the Lower Tray Assembly) is available. The printer features a built-in multi-purpose tray from which specialty media, cardstock and envelopes can be fed. The printer also supports manual feeding using the multi-purpose tray. An optional auto-duplex unit allows the printer to automatically create two-sided prints. The duplex unit takes the place of the main (top) tray. The duplex unit requires using the optional two-tray second feeder as a paper source. The duplex unit upgrade kit includes the optional two-tray feeder. When printing double-sided, print times are generally doubled. Two-sided monochrome printing is at 4 ppm, two-sided color at 2 ppm. After being idle for the selected amount of time the printer switches into its Energy Star mode where it consumes less than 45 watts of power. It "awakens" upon receiving data at any of its ports.
Service Guide
3
The Phaser 750 Color Printer
The Phaser 750 Color Printer combines a color laser 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 an Ethernet port for host communication. The Ethernet port supports EtherTalk 10/100baseT, Novell and TCP/IP. An optional network adapter card allow the printer to communicate with Token Ring networks. A USB port is available on the rear panel to directly connect with a USB-compatible host. The printer supports the color PCL5C printer language too. The printer is available in four configurations:
s
The Phaser 750N comes standard with 64 Mbytes of RAM which can be supplemented with an additional 32-, 64- and 128-Mbyte RAM DIMM; maximum usable capacity is 256 Mbytes. The printer contains 136 standard, built-in fonts. The printer contains 136 standard, built-in fonts. The Phaser 750N prints at a color resolution of 1200 x 600 dots-per-inch. The Phaser 750P is the same as the Phaser 750N except it includes 96 Mbytes of memory and can print at a higher resolution of 1200 x 1200 dots-per-inch (Premium mode). The Phaser 750P also support image pipelining for greater throughput, a print collation mode (which requires the hard drive option), and a "First Page Preview" mode. The Phaser 750DP has all the features and capabilities of the Phaser 750P printer but includes 128 Mbytes of RAM and a Lower Tray Assembly and Duplex Unit. The Phaser 750DX has all the features, RAM, and capabilities of the Phaser 750DP printers but includes an internal hard drive which enables Print Collation mode. The hard drive also is pre-loaded with manuals, videos and printer drivers.
s
s
s
The color printers support a 5.3 page-per-minute, composite-black printing "Fast Color" mode which prints at 600 x 600 dpi using three passes, cyan, magenta and yellow, to produce an image instead of the usual four passes, cyan, magenta, yellow and black. Print speeds depend on the chosen resolution and selected media. For resolutions of 1200 x 600 (Enhanced), 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. For 1200 x 1200 (Premium) dpi color printing, the printer color prints at 2 ppm. Monochrome printing is at 8 ppm. The printer prints 600 x 600 dpi, composite black (CMY) draft prints at a rate of 5.3 pagesper-minute. The printers support printing on A-, A4- and Legal-sized paper and transparency film from separate A or A4- or Legal-size trays. An optional two-tray second feeder (called the Lower Tray Assembly) is available. The printer features a built-in multi-purpose tray from which specialty media, cardstock and envelopes can be fed. The printer also supports manual feeding using the multi-purpose tray.
4
Phaser 740 and 750 Color Printers
An optional duplex unit allows the printer to automatically create two-sided prints. The duplex unit takes the place of the main (top) tray. The duplex unit requires using the optional two-tray second feeder as a paper source. The duplex unit upgrade kit includes the optional two-tray feeder. When printing double-sided, print times are generally doubled since both sides of a print are printed. Two-sided monochrome printing is at 4 ppm, two-sided color at 2 ppm. After being idle for the selected amount of time the printer switches into its Energy Star mode where it consumes less than 45 watts of power. It "awakens" upon receiving data at any of its ports. The printer features Intelligent Ready software which monitors when and how the printer is used. Tracking these patterns over a rolling 3-week period, the printer automatically places itself in standby power-saving modes during periods of non-use. The printer automatically returns to Ready mode, just prior to a a use period, to avoid having users wait for the printer to warm up.
Service Guide
5
Phaser 740 printer RAM and printer capabilities
The Phaser 740 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:
s s s s s
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; such as type, parity, size, and manufacturer, about the DIMM installed in each slot. Upon power-up, the image processor interrogates the 256 byte Serial Presence Detect ROM which describes the DIMM with details such as data width, clock delay, number of address columns and row, refresh rate and more. If the DIMM does not meets the required specifications it will be ignored; no error message will be reported. With more memory the printer gains the capabilities of printing at higher resolutions, printing without having to use image compression (which trades off less installed RAM for longer image processing time) and dual frame buffers for printing one image while processing a second image (which gives greater printing throughput). With additional RAM memory the printer's capabilities increase as detailed in the following table:
Installed RAM and printer capabilities
Feature 600 x 600 dpi 1200 x 1200 dpi Pipelining Frame buffer 1 Letter size image with compression 1 Letter size image with no compression 16 Mbytes Color/mono Black and white only 32 Mbytes Color/mono Black and white only 64 MBytes Color/mono Color and black and white Yes, if SCSI board installed 2 Letter-size images with compression Yes, if SCSI board installed Yes, if SCSI board installed 80 Mbyte Color/mono Color and black and white Yes, if SCSI board installed 2 Letter-sized frame buffers with no image compression Yes, if SCSI board installed Yes, if SCSI board installed
Check print Collation (requires hard drive)
6
Phaser 740 and 750 Color Printers
Print the Configuration Page and check the item "installed RAM" to see what type of RAM is installed. For example: Installed RAM: 64 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 16 Mbyte 32 Mbyte 32 Mbyte 64 Mbyte 64 Mbyte 128 Mbyte 32 Mbyte 64 Mbyte 32 Mbyte 64 Mbyte 128 Mbyte 16 Mbyte 32 Mbyte 32 Mbyte 32 Mbyte 64 Mbyte 64 Mbyte 64 Mbyte 128 Mbyte Maker Samsung Samsung Samsung Samsung Samsung Samsung Smart Module Smart Module NEC NEC NEC Micron Tech. Micron Tech. Micron Tech. Micron Tech. Micron Tech. Micron Tech. Micron/Crucial Micron Tech. Part Number KMM366S203BT KMM366S403BT KMM3665403CTL-G0 KMM366S824AT KMM3665823BTL-G0 KMM366S1623AT SM564043574N6AA SM564088574N6AA MC-454AD645F-A10B MC-454CB645FA-A10B MC-4516CD645FZ-A10B MT8LSDT264AG-66CL2 MT16LSDT264AG-10BC4 MT16LSDT264AG-662C1 MT16LSDT464A6-662xx MT8LSDT864AG-662D3 MT8LSDT864AG-10BD2 CT8M6454D10-MBT66LP MT16LSDT1664AG-662DT
Service Guide
7
Phaser 750 printer RAM and printer capabilities
The Phaser 750 printer features two DIMM connectors which accept 32-, 64-, and 128Mbytes RAM modules. The printer can use off-the-shelf SODIMM meeting these specifications:
s s s s s
144-pin SODIMM Synchronous DRAM PC-100 compliant 3.3 volt Valid on-board Serial Presence Detect ROM.
The Configuration Page lists the amount of installed RAM and the details; such as type, parity, size, and manufacturer, about the module installed in each slot. With more memory the printer gains the capabilities of printing at higher resolutions, printing without having to use image compression (which trades off less installed RAM for longer image processing time) and dual frame buffers for printing one image while processing a second image (which gives greater printing throughput). With additional RAM memory the printer's capabilities increase as detailed in the following table:
Installed RAM and printer capabilities
Feature 1200 x 600 dpi 1200 x 1200 dpi Pipelining Frame buffer 1 Letter size image with no compression No No 750N 64 Mbytes Color/mono No 750P 96 MBytes Color/mono Color Yes 2 Letter-size images with compression Yes Yes 750DP/DX 128 Mbyte Color/mono Color Yes 2 Letter-sized frame buffers with no image compression Yes Yes
Check print Collation (requires hard drive)
8
Phaser 740 and 750 Color Printers
Print the Configuration Page and check the item "installed RAM" to see what type of RAM is installed. For example: Installed RAM: 64 Mbytes Memory Slot 1: SDRAM/parity/64 MB/8LSDT864HG-10EB5 Memory 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 32MB 64MB 128MB Maker Micron Micron Micron Part Number MT4LSDT464HG-10E MT8LSDT864HG-10E MT8LSDT1664HG-10E
Service Guide
9
Print engine assemblies
Main charger corona unit Pre-exposure lamp Ozone filter Toner level sensor board Laser scanner
Imaging unit Paper feeder
Black toner cartridge Cyan toner cartridge Magenta toner cartridge Yellow toner cartridge Pre-transfer lamp
A4
Paper tray Fuser
Toner cartridge selector/paper exit unit (right door)
3102-02
Print engine major components
10
Phaser 740 and 750 Color Printers
Toner cartridge motor Power supply unit
Toner cartridge Laser driver Ozone fan board drive unit (Phaser 740)
High voltage board Image processor board
Engine control board
Fuser fan Cleaning board Paper feed motor Main motor Temperature/humidity sensor board Interconnect board Lower door open sensor
3102-03
Print engine components (continued)
Service Guide
11
Accumulator belt Toner level home position sensor sensors (transmitters) Aligning sensor
Main charge grid (Scorotron charger) sensor Toner level sensors (receivers) are mounted inside the toner cartridge driver unit
Multi-purpose tray feed sensor
Front right door opened switch Transfer roller position sensor Transparency sensor (Phaser 750) Left door opened switch Fuser-exit sensor
Output tray full sensor Power switch Paper-exit sensor ADU jam sensor Paper tray type sensors Paper-empty sensor ADU gate sensor (inside reverser)
3102-04
Print engine sensor, switch and solenoid locations
The photoconductive belt position sensor is not illustrated. This optical sensor marks the home position of the photoconductive belt. It is mounted inside the customerreplaceable imaging unit.
12
Phaser 740 and 750 Color Printers
The image processor board
Phaser 740
Font ROM DIMM RAM DIMM 2 RAM DIMM 1 PostScript code ROM DIMM CPU Network Card NV RAM Boot ROM
Image processor board
SCSI riser board Features of the image processor board
Real Time clock
3102-41
Service Guide
13
Phaser 750
RAM module 2 RAM module 1
NVRAM Network card or hard disk drive CPU
PostScript ROM DIMM (updates standard PostScript ROM soldered to board) Battery (not replaceable) Features of the image processor board
3102-43
14
Phaser 740 and 750 Color Printers
Front panel
These front panel features are found on the printer:
s s
A two-line, 24-character LCD and two LEDs Four push buttons
LCD 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. Print engine status includes messages such as Out of paper, Paper Jam, and Out of Toner. The interactive menu can only be entered while the print engine and image processor are idle. The interactive menu allows the user to review and change certain NVRAM, I/O ports and peripheral parameters. Buttons Button 1, the left-most button labeled the Exit key, cancels an operation while in the interactive menu. The functions of Buttons 2, 3 and 4 are defined by the particular menu or function being displayed on the LCD display. The bottom row of the LCD labels the current function of each button.
In addition, pressing the buttons as you turn on the printer enables certain diagnostic modes:
s
Pressing and holding Button 1, as you turn on the printer, skips power-up diagnostics (except for a brief kernel test) and proceeds to PostScript startup. Pressing and holding Button 3, as you turn on the printer, executes interactive service tests. Refer to "Phaser 740 service tests" on page 77.
s
The topic, "Resetting NVRAM" on page 91 explains how to use the front panel buttons to reset the printer's NVRAM to its factory default values.
Service Guide
15
LEDs The Power LED indicates the printer has +5 VDC available for its logic control boards.
The Error LED has three meanings:
s s
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. Blinking indicates an error has been detected. An error message, such as, Paper Jam at Output, is displayed on the LCD.
s
Power Error Exit
Button 1 Button 2 Button 3 Button 4
3102-30
The front panel
16
Phaser 740 and 750 Color Printers
Rear panel
The rear panel of the printer features the host interface connectors:
s
Bi-directional parallel (high-density connector). For the Phaser 750, the parallel port can be used to connect to a qualified optical scanner. Phaser 740 printer: Twisted Pair10baseT Ethernet connector. Phaser 750 printer: Twisted Pair10/100baseT Ethernet connector. RX indicator (green); blinks while the network card is receiving data. The LED is off steady while no data is being received. If the LED is on steady, then a problem (probably hardware) has occurred at the network hub. Phaser 740 printer only: SCSI high-density connector for connecting an external hard disk drive or optical scanner only). The Phaser 750 printer has no SCSI support. Phaser 750 printer only: USB Type A connector for connecting to a USBcompatible host.
s
s
s
With the addition of the appropriate network card, the printer can feature either of these groups of connectors:
s
Phaser 740 printer only: ThinNet (100base2) and Twisted Pair (100baseT) Ethernet connectors. RX indicator (green); blinks while the network card is receiving data. The LED is off steady while no data is being received. If the LED is on steady, a problem (probably hardware) has occurred at the network hub. Phaser 740 printer only: LocalTalk connector. Unshielded Twisted Pair (10baseT) and shielded Twisted Pair (DB-9) Token Ring connectors. The Token Ring card installed disables the built-in Ethernet port.
s s
Test print button
In the center of the rear cabinet panel is the test print button. Pressing this button while the printer is idle causes the print engine to print a built-in test print. The print consists of a field of thin horizontal lines. The print is made independently of the image processor board. Hold in the test button for at least 4 seconds before releasing, or until you hear the print process begin. The print demonstrates that the print engine can print (independently of the image processor); it has no use for determining print quality.
Note
Phaser 740 printer: The Test Print button will not make a test print if the auto-duplex unit is installed since the Test Print function defaults to the upper tray.
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Network card LEDs
The Ethernet port has two LED indicators. The LEDs are also found on the Ethernet network card used by the Phaser 740 printer:
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TX indicator (yellow); blinks while data is transmitted to the host. The LED is off while no data is being sent. Twisted Pair (100baseT). RX indicator (green); blinks while the network card is receiving data. The LED is on steady while no data is being received. If the LED is off steady, then a problem (probably hardware) has occurred at the network hub. ThinNet (100base2). RX indicator (green); blinks while the network card is receiving data. The LED is off steady while no data is being received. If the LED is on steady, then a problem (probably hardware) has occurred at the network hub.
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TP Link. On steady indicates good circuit to nearest port; off indicates no circuit. 100 MBS. Ethernet speed is 100 MBS when lit. Do not use both Ethernet connectors at the same time. With a Ethernet network card or Token Ring network card installed, the builtin Ethernet port is disabled.
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Note
The Token Ring network card has two LED indicators:
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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); off when the card is set for 4 megabits-per-second (MBPS), on when the card is set for 16 MBPS. When both LEDs blink, a network card failure has occurred.
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Phaser 740 and 750 Color Printers
The printer also support an internal IDE hard drive in place a network card as a part of a factory installed option.
Slot for network card or IDE hard drive 10baseT Ethernet
PhaserShareTM Series B Token Ring Card PhaserShareTM Series B Ethernet Card
RX TX
PhaserShareTM Series B LocalTalk Card
RX TX
100 Mbs
10/100baseT Ethernet card SCSI Parallel
The Phaser 740 rear panel
TP LINK 10/100Base-TX 10Base2
STP UTP
LocalTalk card
LocalTalk®
16 Mbs TX
Token Ring card
INS RX
IDE Internal Hard Drive
3102-05
PhaserShareTM Series B Token Ring Card
STP
Slot for network card or IDE drive USB 10/100baseT Ethernet Parallel
Token Ring card
UTP 16 Mbs TX INS RX
IDE Internal Hard Drive
3102-42
The Phaser 750 rear panel
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Health LED (Phaser 740 only)
A health LED indicates the status of the image processor board. The health LED is mounted on the image processor board. 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.
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Blinking (at a steady rate): The printer is operating normally. The LED blinks irregularly during power-up self-diagnostics. If a soft error occurs, the image processor board operates, but at a reduced capacity. Soft failures include failure of expansion memory DIMMs or any of the interface ports. When a soft error occurs, the printer automatically prints a startup page listing the error.
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On or Off: A hard error condition has occurred that would keep the image processor board from operating.
Media tray type sensing
The combinations of the three tray sensors "tell" the print engine what type of tray is installed. The tray sensors are located on the left-side interior of the paper tray slot. Sensor actuators are attached to the bottom end of the tray to close the appropriate sensor. There are six tray types:
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Letter (A-size) paper Letter (A-size) transparency film Metric Letter (A4-size) paper Metric Letter (A4-size) transparency film Legal-size paper Auto-duplex unit
Tray switch sensor combinations
Left switch Closed Closed Open Open Open Closed Middle switch Open Closed Open Closed Closed Open Right switch Open Open Closed Closed Open Closed Tray type Letter (A-size) paper Letter (A-size) transparency film Metric Letter (A4-size) paper Metric Letter (A4-size) transparency film Legal size paper Auto-duplex unit
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Phaser 740 and 750 Color Printers
Sensor actuators Middle Left Right
Tray sensors
3102-31
Tray switch sensors and actuators
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Difference between Phaser 740 and 750
Summary of differences between Phaser 740 and Phaser 750
Phaser 750 unique part Main board Details The main board is based on a faster 603E processor running at 200 MHz. It features a new rear panel with built-in10/100BaseT and no SCSI port. The large Dallas NVRAM chip is no longer used. Also, the Phaser 750 IP board has no removable Boot ROM chip. A battery on the main board will support the real-time clock (10 year life). The printer supports up to 256 Mbytes of RAM. Only a Token Ring Card and an IDE Internal Hard Drive are available. The Phaser 750 printer uses100 Mhz, laptop computer-style RAM modules in SODIMM connectors Built-in, autoswitching 10/100baseT Ethernet port available on all Phaser 750 printer models The Phaser 750 features a 4 page-per-minute, 1200 x 600 dpi Enhanced print mode as its default mode. Built-in Intelligent Ready software tracks usage patterns and places the printer in Standby mode during periods of non-use and wakes-up the printer prior to a use period. Euro currency symbol added to the internal PostScript fonts. Numerous built-in printable Help pages Support for approved scanners as a optical copier through the parallel port. All fonts are available in the PostScript ROMs soldered on the main board or in the snap-in PostScript ROM module which override the built-in ROMs. The Kanji font is available on a PostScript DIMM. Other Asian fonts are only available on an optional internal hard drive. The Phaser 750 printer's paper feeder, which is customer replaceable, features quick-release tabs to facilitate removing the paper feeder. It also features a transparency sensor. The paper feeder is not reverse compatible to the Phaser 740 printer. The Phaser 750 printer support Executive-size paper (7.25 x 10.5 in.) from the Multi-Purpose Tray. The Phaser 750 printer features, new, easier-to-navigate menus.
RAM modules 10/100baseT Ethernet New Enhanced print quality Intelligent Ready mode
Euro currency symbol Embedded Pages Scanner support No font DIMM
Paper feeder
New supported media Front panel
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Phaser 740 and 750 Color Printers
Specifications
Physical dimensions
Dimensions Height: Width: Depth: Weight: Specification 46.3 cm (18.2 in.) With Lower Tray Assembly: 68.6 cm (27 in.) 50.73 cm (20 in.) With output tray: 78.2 cm (30.8 in.) 49.2 cm (19.4 in.) Approximately 47.5 kgs (104.6 lbs.) with consumables installed. Approximately 31.9 kgs (70.2 lbs.) without Lower Tray Assembly.
Printer clearances
Clearances Top: Left: Right: Front: Rear: Bottom: Mounting surface flatness: Specification 7.6 cm (3 in.) 7.6 cm (3 in.) 10.2 cm (4 in.) for handling the paper tray Unlimited for removal of consumables 15.3 cm (6 in.) for connecting computer cable and power cord No obstruction under printer that could block its cooling vents. Within 2 degrees of horizontal with all four feet in contact with the table surface.
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Functional specifications
Characteristic Printing process Color medium Specification Electro-photographic, four color (CMYK) transfer printing Four toner cartridges each contain one of four colors: cyan, magenta, yellow or black. The toner is a nonmagnetic, monocomponent contact medium. Standard, Fast Color and Presentation mode: 600 x 600 dots-per-inch text and graphics Enhanced mode: 1200 x 600 dpi test and graphics Premium mode: 1200 x 1200 dpi text and graphics Time from paper-load to paper-eject for continuous A, A4 printing: Four-color 4 ppm at 600 x 600 dpi (Phaser 740) paper: 4 ppm at 1200 x 600 (Phaser 750) 2 ppm at 1200 x 1200 dpi Monochrome: 16 ppm at 600 dpi 8 ppm at 1200 dpi Time from paper-load to paper-eject for continuous Legal printing: Four-color 2 ppm at 600 dpi paper: 1 ppm at 1200 dpi Monochrome: 8 ppm at 600 dpi 4 ppm at 1200 dpi Four-color transparency: 2 ppm Fast color, three-color (CMY): 5.3 ppm at 600 dpi Print times do not include image processing time, which can vary depending on image complexity. A-size: Left and right 4 mm (0.15 in.), Top 5 mm (0.2 in.), Bottom 5 mm (0.2 in) A4-size: All sides, 5 mm (0.2 in.) Legal-size: Left and right 4 mm (0.15 in.), Top 5 mm (0.2 in.), Bottom 5 mm (0.2 in) Tray: A-size (letter), A4-size (Metric letter), Legal premium Bond laser printer or copier paper Tray feed paper weight: 60 to 90 g/m2 (16 to 24 lb.) Multi-purpose tray: 89 x 254 to 216 x 356 mm (3.6 x 10 to 8.5 x 14 in.) Executive-size paper (7.25 x 10.5 in.) #10 Envelope of a good quality. Tektronix-brand Glossy Coated paper Tektronix-brand Label media Tektronix-brand Cover Stock paper Tektronix-brand transparency film Only Tektronix-brand A- and A4-size transparency film is supported. Multi-purpose tray paper weight: Cover Stock up to 163 g/m 2 (60 lb) Index Stock up to 163 g/m2 (90 lb) Two-sided printing: 75 to 90 g/m2 (20 to 24 lb) Paper tray capacity 250 sheets using 20-lb. paper. 100 sheets of transparency film from transparency tray. The optional Lower Tray Assembly also uses trays with the same capacity.
Addressability
Printing speed (A, A4, Legal paper)
Minimum printing margins
Usable paper
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Phaser 740 and 750 Color Printers
Electrical specifications
Characteristic Primary line voltages Primary voltage frequency range Power consumption Specification 90 to 132 VAC (115 VAC or 100 VAC nominal); 198 to 264 VAC (220 VAC nominal) 50 to 60 Hz 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 110 VAC configuration 8 and 10 amp 220 VAC configuration 4 and 5 amp Image processor: + 5 VDC ± 0.25 (1A minimum, 6 A maximum) Print engine: + 5V ± 0.25 (2.2 A max) + 24V ± 0.25 (3.0 A max) Both 110 and 220 VAC-configured instruments pass these standards: FCC Part 15 Class B VDE Class B EN60555-2 Class A VCCI (CISPR 22) Class B
Primary voltage fusing Secondary DC voltages
RF emissions
Environmental specifications
Characteristic Best print quality obtained Temperature Operating Non-operating Storage Humidity Operating Non-operating Altitude Operating Non-operating Vibration/shock Operating Non-Operating (vibration) Non-operating (shock) Acoustic Noise (operating) Specification With in 15.5 to 25.5 C (60 to 78 F) and 30 to 65% RH
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15.5 too 32.5 C (60 too F) 91 o o 0 oto 40 oC (32 to 104o F) -0 to 40 C (32 to 104 F) Media should be acclimated 24 hours before using in the printer. 10 to 80% relative humidity, non-condensing 10 to 90% relative humidity, non-condensing Media should be acclimated 24 hours before using in the printer. 0 to 2500 m (8,000 ft.) at 25 C 0 to 15000 m (50,000 ft.) May drop any side or corner 50 mm (2 in.) without impairment of subsequent operation. On five mutually perpendicular axes: 0.5 g, 25-minute sweep, 5 to 200 to 5 Hz, 100 to 200 sec./sweep cycle. No resonant frequencies below 50 Hz. 15 g, trapezoidal flared pulse, 20 msec each axis. Average sound level (LEQ) is less than 53 dbA. Peak noise in standby mode is 47 dbA.
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o
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o
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Regulatory specifications
The printer is a recognized component in conformance with the following regulatory standards:
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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. GS licensed IEC 950 (1991) Second Edition; EN60950 Information Processing and Business Equipment. EN50022 (CISPR 22) Class B EN61000-3-2 EN61000-3-3 VCCI (CISPR 22) Class B FCC Class B (for 115 VAC equipment) pursuant to Sub-part J of Part 15. ICES 03 Class B
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Phaser 740 and 750 Color Printers
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. These error codes are discussed in the next topic. When an error code first occurs, cycle power on the printer to see if the error re-occurs.
Print engine error codes
The following table list the engine failure codes that may be displayed on the printer's front panel during normal printer operation.
Print engine service error codes
Error code 1, 2, 3, 4 Meaning of error code and what to do about it Black, Cyan, Magenta, Yellow (respectively) toner cartridge movement error. 1. Push the indicated toner cartridge toward the imaging unit. Does it require more force to push that cartridge than the other toner cartridges? 2. Inspect the wiring harness leading from the toner cartridge selector/eject unit to CN6 of the engine control board. 3. Check the cam motors for proper operation toner cartridge selector/eject. 4. Inspect the cam motor drive gears in the toner cartridge selector/eject. 5. Check the cam motor flags and sensors toner cartridge selector/eject. 6. Replace the toner cartridge selector unit. 7. Replace the indicated toner cartridge. 05 Toner cartridge/fuser fan error. 1. Is +24 VDC being supplied to the fan from the engine control board's CN24 pins 1 and 2? If it is, replace the fan. If not, replace the engine control board. 10 Laser scanner motor unlocked. 1. 2. 3. 4. 5. Inspect the wiring harnesses leading to the laser scanner. Replace the laser motor drive board. Replace the laser scanner. Replace the engine control board. Replace the power supply.
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Print engine service error codes
Error code 12 Meaning of error code and what to do about it L-sync over time. 1. Inspect the wiring harnesses leading from the laser driver board to CN4. CN7, CN8 and CN 29 of the engine control board. 2. Replace the laser motor drive board. 3. Replace the laser scanner. 4. Replace the engine control board. 13 L-sync under time. 1. 2. 3. 4. Cycle printer power and try printing again. Replace the laser motor drive board. Replace the laser scanner. Replace the engine control board.t
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Phaser 740 and 750 Color Printers
Print engine service error codes
Error code 20 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. Also ensure the wire and grid plate are in good condition. 3. Inspect the wiring leading from the high voltage board to the main charge grid. 4. Replace the main charge grid if necessary. 5. Replace the imaging unit. 6. Replace the high-voltage board. First bias transfer roller 1. Ensure that the imaging unit is properly installed and locked in place. 2. Inspect the wiring leading from the high voltage board to the imaging unit. 3. Replace the imaging unit. 4. Replace the high-voltage board. Second bias transfer roller 1. Ensure that the paper feeder is properly installed and locked in place. 2. Ensure the transfer roller is properly installed. Ensure the bias roller makes good contact with its electrical contacts. 3. Inspect the wiring leading from the paper feeder to CN20 of the engine control board. 4. Inspect the wiring leading from the high voltage board to the second bias transfer roller. 5. Replace the high-voltage board. Toner cartridge bias 1. Ensure that each toner cartridge makes good electrical contact with its high voltage bias terminals. 2. Inspect the wiring leading from the high voltage board to the toner cartridge bias terminals. 3. Replace the toner cartridge if a single cartridge is exhibiting trouble. 4. Replace the high-voltage board. 5. Too much conductive grease on the high-voltage contacts of a toner cartridge developer roller has migrated down and shorted to the chassis. Conductive grease should be used very sparingly.
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Print engine service error codes
Error code 21 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. 3. Inspect the wiring harness leading from the accumulator belt position sensor to CN13 of the engine control board. 4. Replace the imaging unit. 5. Replace the accumulator belt position sensor. 6. Replace the engine control board. 22 Positioning error of the photoconductive belt. 1. Ensure that the imaging unit is properly installed and locked in place. 2. Ensure the tension lever of the imaging unit is set in the locked position. 3. Inspect the wiring harnesses leading in and out of the charger sensor board. 4. Replace the imaging unit. 5. Replace the engine control board. 30 Accumulator belt out of position. 1. Is the imaging unit at the end of its life? 2. Is there toner on the accumulator belt cleaning blade holder? (The holder is located on the imaging unit, along the bottom of the green OPC belt.) 3. Check to see if any toner cartridges are leaking toner. 4. Ensure that the imaging unit is properly installed and locked in place. 5. Inspect and clean the transparent plastic cover over the accumulator belt position sensor. This sensor is located on the interior of the back wall of the chassis. 6. Inspect the wiring harnesses leading in and out of the charger sensor board. 7. Replace the imaging unit. 8. Replace the engine control board. 32 Accumulator belt cleaning blade movement error. If the Error 32 is constant: 1. Replace the imaging unit 2. Replace the accumulator cleaner clutch shaft and the cleaning board 3. Replace the engine control board. If the Error 32 is intermittent: 1. Replace the accumulator cleaner clutch shaft and the cleaning board 2. Replace the imaging unit. 3. Replace the engine control board.
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Phaser 740 and 750 Color Printers
Print engine service error codes
Error code 33 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. Ensure the second bias transfer roller is in its lower position. 3. Check that the transfer roller sensor flag properly interrupts its sensor. 4. Does the transfer roller clutch and stop plate operate correctly? 5. Inspect the wiring harness leading from the paper feeder to CN20 of the engine control board. 6. Replace the paper feeder. 7. Replace the engine control board. 34 Fuser roll exhausted error. Oil web has gone or is about to go off end of the roll. 1. Replace the fuser roll with new assembly and cycle power on printer (at least 3 seconds off) 2. Replace the fuser. 41 Fuser high temperature error. 1. Replace the fuser. 2. Inspect the wiring harness leading from the fuser to CN25 of the engine control board. 3. Replace the engine control board. 4. Replace the power supply. 42 Fuser thermistor open. 1. Ensure the fuser is properly installed and firmly seated in place. 2. Replace the fuser. 3. Inspect the wiring harness leading from the fuser to CN25 of the engine control board. 4. Replace the engine control board. 43 Fuser temperature rising too slow error. 1. Remove and reinstall the fuser. Insert it smoothly and solidly, with force, into place. Secure it with its thumbscrew. 2. Ensure the fuser is the correct type for the printer a 220 volt fuser installed in a 110 volt printer produces an Error 43. 3. Inspect the wiring harness leading from the fuser to CN25 of the engine control board. 4. Replace the engine control board. 5. Replace the fuser. 6. Replace the power supply and the fuser (Phaser 740 only). 50 Power supply fan error. 1. Is +24 VDC being supplied to the fan from the control board connector CN30 pins 1 and 2? If it is, replace the fan. If not, replace the power supply.
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Print engine service error codes
Error code 51 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. 52 Auto-duplex unit fan error. 1. Replace the tray sensor board. 2. Is +24 VDC being supplied to the fan from the engine control board thru the duplex unit's interconnect connector and wiring harness during duplex printing? If it is, replace the auto-duplex unit. If not, replace the engine control board. 53 Transparency sensor error 1. Clear media jam 2. Replace paper feed unit. 60 Multi-purpose tray pick-up roller motor error 1. Is the tray over-filled. Too much media will overload the motor. 2. Is the multi-purpose tray motor properly connected to the paper feeder connector CN608. Inspect its wiring harness. 3. Inspect the wiring harness leading from the paper feed motor to connector CN20 of the engine control board. 4. Replace the paper feeder. 5. Replace the engine control board. 61 Toner cartridge (sleeve) drive motor lost sync. 1. Are the toner cartridges properly installed in position? 2. Does each toner cartridges developer roller rotate when driven by the motor? If not replace the toner cartridge. 3. Does the toner cartridge motor rotate? Check the toner cartridge motor's wiring harness to the engine control board at CN26. If the wiring checks out, replace the toner cartridge motor. 4. Check the toner cartridge drive gears. 5. Replace the engine control board. 62 Paper feed motor lost sync. 1. Does the paper feed motor run and generate torque? 2. Does the gear train of the paper feeder rotate properly? 3. Inspect the fuser. Did the fuser roll wrap itself around the fuser's hot roller? 4. Does the gear train of the fuser rotate properly? 5. Does the gear train of the paper eject rollers rotate properly? 6. Inspect the wiring harness leading from the paper feed motor to connector CN20 of the engine control board. 7. Replace the paper feed motor. 8. Replace the engine control board.
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Phaser 740 and 750 Color Printers
Print engine service error codes
Error code 63 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. If the gear is difficult to turn, replace the imaging unit. 3. Inspect the drive gear for missing teeth. 4. Does the main motor rotate? Check the main motors wiring harness to the engine control board at CN15. If the wiring checks out, replace the main motor. 5. Replace the engine control board. 64 Lower Tray Assembly error. 1. Is the printer correctly installed on top of the lower tray assembly? 2. Ensure that the Lower Tray Assembly is the correct model for the printer. Lower Tray Assemblies for earlier model printers, such as the Phaser 560, will not work with the Phaser 740. 70 Program ROM Checksum error. 1. Replace the engine control board. 2. Replace the engine board NVRAM. 71 Program SRAM Checksum error. 1. Replace the engine control board. 2. Replace the engine board NVRAM. 72 EEPROM Checksum error (ECU). 1. Replace the engine control board. 2. Replace the engine board NVRAM. 73 EEPROM Checksum error (imaging Unit). 1. Replace the imaging unit. 2. Replace the engine control board. 3. Replace the engine board NVRAM. 74 EEPROM Checksum error (fuser). 1. Replace the fuser. 2. Replace the engine control board. 3. Replace the engine board NVRAM. 80 VSYNC time-out. 1. Check connection between the image processor board and the engine control board. 2. Replace the engine control board. 3. Replace the image process board. 81 Power missing error. Engine control board not powered. 1. Check wiring harness CN25 to the engine control board.
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Print engine service error codes
Error code 82 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. Replace the engine control board. 83 Command error. The image processor sent bad data to the engine control board. 1. Make sure the toner cartridges are installed, then cycle printer power. 2. Reset the image processor NVRAM. 3. Check the connection between the image processor board and the engine control board. 4. Replace the image process board. 5. Replace the engine control board. 84 Parity error. 1. Reset the image processor NVRAM. 2. Check the connection between the image processor board and the engine control board. 3. Replace the image process board. 4. Replace the engine control board.
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Phaser 740 and 750 Color Printers
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. Any failure not allowing the printer to print the start page are displayed on the printer's front panel with a two-digit hex code indicating what the error is. A two digit hex code with the suffix "p" indicates the failure occurred during normal powerup self test.
Normal power up error codes
Code 10p 11p 13p 1bp 1cp 21p 25p 26p 28p 29p 2bp 2cp 2ap 2fp 1dp 31p 32p 36p 37p 3ap 3bp 47p Power-up test Image Processor CPU Interrupt Instruction ROM Checksum NVRAM Acknowledge PROM Data Font ROM Checksum Write/Read Centronics SCSI Interrupt W/R SCSI Register W/R LCA Registers W/R CDU Register CDU Data Compression CDU Data Decompression DMA Address Test Network Card DRAM DIMM Configuration Base DRAM Address Paths Expansion DRAM Data Paths DIMM1 Data Paths DIMM1 Address Paths DIMM2 Data Paths DIMM2 Address Paths Engine Control Board Status 7. Replace the image processor to engine board cable 8. Replace the engine control board Corrective action 1. Ensure that correct RAM DIMMs, Code ROM SIMM, SCSI card and network card are installed 2. Reset the NVRAM 3. Replace the Code ROM SIMM 4. Replace the RAM DIMMs 5. Replace the image processor board 6. Replace the font SIMM (if installed on Phaser 740)
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Phaser 740 and 750 Color Printers
Troubleshooting
This topic discusses troubleshooting the printer. Troubleshooting is discussed with two approaches:
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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.
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System power-up sequence
The following lists the chain of events that occur when you turn on the printer. Follow this list as one means of determining if the printer is operating correctly. When the power switch is turned on, these events occur:
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The engine control board checks its RAM. All the engine fans are turned on to ensure they work properly. The fuser heater (a halogen lamp) is activated to heat up the heated roller. The position of each toner cartridge is checked to ensure they are in their parked positions. The print engine checks to see that the imaging unit and the paper feeder are installed. The engine motors are rotated to ensure that their rotation sensors are detected. A check is made to determine if any paper is jammed in the printer. The print engine checks the level of toner in each toner cartridge. After the fuser reaches its idle temperature the printer is placed on line in its READY state.
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The print engine is initialized. If the startup page feature has not been disabled and no error occurred with the printer, the printer prints a startup page.
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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
1. 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" on page 39.
2. Observe that the Ready message is displayed on the front panel. If it is not, go
to the later topic "Verifying power supply operation" on page 39.
3. Phaser 740 printer only: Verify that the image processor's health LED is flashing.
The health LED is viewable through the grill behind the manual feed tray (when the tray is lowered).
4. Press and hold the test button for 4 seconds (on the rear of the printer in the
center of the rear cabinet panel). The print engine responds by making a parallel line test print. If the printer prints a test print, then the printer's print engine is working correctly. Proceed with the next topic, "Verifying printer operation by using its self-test print" on page 39. If the printer does not make the test print, then a problem exists with the printer. Proceed with the topic, "Verifying power supply operation" on page 39.
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Phaser 740 and 750 Color Printers
Verifying printer operation by using its self-test print
1. 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."
2. When the Ready message is displayed, press the Menu button to enter the menu. 3. Press the scroll buttons to navigate to the Test Prints menu item. Select any test
print.
4. Press Print to print a test prints. The printer should print a test page from the
image processor memory. If the printer prints a test pattern, then the print engine and image processor are working correctly and the printer's problem resides with the network or host interface.
Verifying power supply operation
Required tools s #1 Phillips screwdriver s Volt-ohm-meter (VOM)
Verifying the power supply involves four steps:
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Measuring the input and output voltages. Checking the power supply fuse(s). Checking its safety interlocks. Testing for a shorted motor which would shut down the power supply or damage the engine control board.
Measuring power supply voltages
1. Turn off the printer and unplug it from its power outlet. 2. AC Input: With the VOM set to measure AC voltages, measure for power being
supplied to the printer. It should measure between 87 to 128 VAC (115 VAC nominal) or 174 to 250 VAC (220 VAC nominal).
3. Power supply fan: With the power switch on, is the main fan running? If not,
check the fan's wiring harness (CN9) to the engine control board; it should measure 24 VDC. If the voltage is not correct, replace the engine control board. Otherwise, replace the power supply fan.
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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 ill