Xerox Phaser 7300B, Phaser 7300DX, Phaser 7300N, Phaser 7300 Service Manual

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Page 1

Phaser

Color Printer

Service

Manual

7300

Page 2

Page 3

PHASER® 7300 COLOR PRINTER SERVICE MANUAL

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: September 2002 071-0862-00

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Copyright © 2002, Xerox Corporation. All Rights Reserved. Unpublished rights reserved under the copyright laws of the United States. Contents of this publication may not be reproduced in any form without permission of Xerox Corporation.

Copyright protection claimed includes all forms of matters of copyrighted materials and information now allowed by statutory or judicial law or hereinafter granted, including without limitation, material generated from the software programs which are displayed on the screen such as styles, templates, icons, screen displays, looks, etc.

XEROX®, The Document Company®, the stylized X®, CentreWare®, DocuPrint®, Made For Each

Other

, Phaser®, PhaserShare®, and the TekColor® icon are registered trademarks of Xerox Corporation. infoSMART™, PhaserPort™, PhaserPrint™, PhaserSMART™, PhaserSym™, PhaserTools™, and the TekColor™ name are trademarks of Xerox Corporation. Total Satisfaction Services

is a service mark of

Xerox Corporation.

Adobe®, Acrobat® Reader®, and PostScript® are registered trademarks of Adobe Systems Incorporated.

Apple®, LaserWriter®, LocalTalk®, Macintosh®, Mac® OS, and AppleTalk®are registered trademarks of Apple Computer Incorporated.

PCL® and HP-GL® are registered trademarks of Hewlett-Packard Corporation.

MS-DOS® and Windows® are registered trademarks of Microsoft Corporation.

Novell® and NetWare® are registered trademarks of Novell, Incorporated.

Sun® and Sun Microsystems® are registered trademarks of Sun Microsystems, Incorporated. SPARC® is a registered trademark of SPARC International, Incorporated. SPARCstation™ is a trademark of SPARC International, Incorporated, licensed exclusively to Sun Microsystems, Incorporated.

UNIX® is a registered trademark in the US and other countries, licensed exclusively through X/Open Company Limited.

This product includes an implementation of LZW licensed under U.S. Patent 4,558,302.

This product uses code for SHA-1 written by John Halleck, which is being used by his permission.

Other marks are trademarks or registered trademarks of the companies with which they are associated.

PANTONE® Colors generated by the Phaser 7300 Color Printer may not match PANTONE-identified solid color standards. Use current PANTONE Color Reference Manuals for accurate colors. PANTONE Color simulations are only obtainable on this product when driven by qualified Pantone-licensed software packages. Contact Pantone, Inc. for a current list of qualified licensees.

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Safety Terms

Manual Terms

Various terms are used throughout this manual to either provide additional information on a specific topic or to warn of possible danger that might be present during a procedure or action. Be aware of all symbols and terms when they are used, and always read NOTE, CAUTION and WA RN I NG messages.

NOTE:

CAUTION:

WARNI NG:

Product Terms:

CAUTION:

DANGER:

A NOTE may indicate an operating or maintenance procedure, practice or condition that is necessary to efficiently accomplish a task. A

NOTE may also provide additional information related to a specific

subject or add a comment on the results achieved through a previous action.

A CAUTION indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in damage to, or destruction of, equipment.

A WARNING indicates an operating, or maintenance procedure, practice or condition that, if not strictly observed, could result in injury or loss of life.

A personal injury hazard exists that may not be apparent. For example, a panel may cover the hazardous area.

A personal injury hazard exists in the area where you see the sign.

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Power Safety Precautions

Power Source

For 110 VAC printers, do not apply more than 127 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 240 volts RMS between the supply conductors or between either supply conductor and ground. Use only the specified power cord. This manual assumes that the reader is a qualified service technician.

Warning: Plug the three-wire power cord (with grounding prong)

into a grounded AC outlet only. If necessary, contact a licensed electrician to install a properly grounded outlet. If the product loses it’s ground connection, contact with conductive parts may cause an electrical shock.

Disconnecting Power

Warning: Turning the power off using the On/Off switch does not

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,

■ Or if any liquid or foreign material is spilled into the case,

■ Or if the printer is exposed to moisture,

■ Or if the printer is dropped or damaged,

■ Or if you suspect that the product needs servicing or repair,

■ Or whenever you clean the product.

completely de-energize the printer. You must also disconnect the printer power cord from the AC outlet. Position the power cord so that it is easily accessible during servicing so that you may power down the printer during an emergency.

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Electrostatic Discharge (ESD) Precautions

Some semiconductor components, and the respective sub-assemblies that contain them, are vulnerable to damage by electrostatic discharge (ESD). These components include integrated circuits (ICs), Large-Scale Integrated circuits (LSIs), field-effect transistors and other semiconductor chip components. The following techniques will reduce the occurrence of component damage caused by static electricity:

Caution: Be sure the power is off and observe all other safety

precautions.

■ Immediately before handling any semiconductor component assemblies,

drain the electrostatic charge from your body. This can be accomplished by touching an earth ground source or by wearing a wrist strap device connected to an earth ground source. Wearing a wrist strap will also prevent accumulation of additional bodily static charges. (Be sure to remove the wrist strap before applying power to the unit under test to avoid potential shock.)

■ After removing a static sensitive assembly from it’s anti-static bag, place it

on a grounded conductive surface such as aluminum foil. If the anti-static bag is conductive, you may ground the bag and use it as a conductive surface.

■ Do not use freon-propelled chemicals. These can generate electrical charges

sufficient to damage some devices.

■ Do not remove a replacement component or electrical sub-assembly from its

protective package until you are ready to install it.

■ Immediately before removing the protective material from the leads of a

replacement device, touch the protective material to the chassis or circuit assembly into which the device will be installed.

■ Minimize body motions when handling unpackaged replacement devices.

Motion such as your clothes brushing together, or lifting a foot from a carpeted floor can generate enough static electricity to damage an electro-statically sensitive device

■ Handle IC’s and EEPROM’s carefully to avoid bending pins.

■ Pay attention to the direction of parts when mounting or inserting them on

Printer Circuit Boards (PCB’s).

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Service Safety Summary

General Guidelines

For qualified service personnel only: Refer also to the preceding Users Safety Summary.

Avoid servicing 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: 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 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 then 250 volts rms for a 220 volt AC outlet or 130 volts rms for a 110 volt AC outlet 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.

Warning Labels

Read and obey all posted warning labels. Throughout the printer, warning labels are displayed on potentially dangerous components. As you service the printer, check to make certain that all warning labels remain in place.

Safety Interlocks

Make sure covers and panel are in place and that all interlock switches are all functioning correctly after you have completed a printer service call. If you bypass an interlock switch during a service call, use extreme caution when working on or around the printer.

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Servicing Electrical Components

Before starting any service procedure, switch off the printer power and unplug the power cord from the wall outlet. If you must service the printer with power applied,

be aware of the potential for electrical shock.

Warning: Turning the power off using the On/Off switch does not

Warning: Do not touch any electrical component unless you are

instructed to do so by a service procedure.

S7300-02

Servicing Mechanical components

Manually rotate drive assemblies to inspect sprockets and gears.

Warning: Do not try to manually rotate or manually stop the drive

assemblies while any printer motor is running

S7300-03

Servicing Fuser Components

Warning: This printer uses heat to fuse the toner image to a sheet of

paper. The Fuser Assembly is very hot. Switch off printer power and wait at least 30 minutes for the Fuser to cool before you attempt to service the Fuser Assembly or adjacent components.

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Regulatory Information

The equipment described in this manual generates and uses radio frequency energy. If it is not installed properly in strict accordance with Xerox's instructions, it may cause interference with radio and television reception or may not function properly due to interference from another device. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

■ Reorient or relocate the receiver (device being interfered with).

■ Increase the separation between the printer and the receiver.

■ Connect the printer into an outlet on a circuit different from that which the

receiver is connected.

■ Route the interface cables on the printer away from the receiver

■ Consult the dealer, Xerox service, or an experienced radio/television

technician for help.

Changes or modifications not expressly approved by Xerox can affect the emission and immunity compliance and could void the user's authority to operate this product. To ensure compliance, use shielded interface cables. A shielded parallel cable can be purchased directly from Xerox at www.xerox.com/officeprinting/7300supplies

Xerox has tested this product to internationally accepted electromagnetic emission and immunity standards. These standards are designed to mitigate interference caused or received by this product in a normal office environment. This product is also suitable for use in a residential environment based on the levels tested.

In the United States this product complies with the requirements of an unintentional radiator in part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference; (2) this device must accept any interference received, including interference that may cause undesired operation.

This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications, ICES-003.

Le présent appareil numérique n'émet pas de bruits radioélectrique dépassant les limits applicables aux appareils numériques de la classe B prescrites dans le Réglement sur le brouillage radioélectrique édicté par le ministere des Communications du Canada, ICES-003.

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Declaration of Conformity

Xerox Corporation, declares, under our sole responsibility that the printer to which this declaration relates, is in conformity with the following standards and other normative documents:

In the European Union

following the provisions of the Low Voltage Directive 73/23/EEC and its amendments:

EN 60950 (IEC 950)

"Safety of Information Technology Equipment including Electrical Business Equipment"

following the provisions of the Electromagnetic Compatibility Directive 89/336/EEC and its amendments:

EN55022:1998

(CISPR 22)

EN61000-3-2:1 995

+A1:1998+A2:1

998.

(IEC61000-3-2)

EN61000-3-3:1 995

(IEC61000-3-3)

EN55024:1998

(CISPR 24)

CISPR 24 Immunity Phenomena

Electrostatic Discharge IEC61000-4-2:1995 6kV Contact, 10kV Air

Radio-Frequency Electromagnetic Field (radiated)

"Limits and Methods of measurement of radio interference characteristics of Information Technology Equipment." Class B.

"Part 3: Limits - Section 2: Limits for harmonic current emissions (equipment input current less than or equal to 16A per phase)."

"Part 3: Limits - Section 3: Limitation of voltage fluctuations and flicker in low-voltage supply systems for equipment with rated current less than or equal to 16A."

"Information technology equipment - Immunity characteristics - Limits and methods of measurement. "

Basic Standard Test Specification

IEC61000-4-3:1995 80-1000 MHz, 3V/m, 80% AM @ 1 KHz

Fast Burst Transients IEC61000-4-4:1995 5/50 Tr/Th ns, 5kHz Rep. Freq

0.5kV on Signal Lines

1kV on AC Mains

Line Surge IEC61000-4-5:1995 Combination wave

2.0kV Common mode

2.0kV Differential mode

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CISPR 24 Immunity Phenomena

Radio-Frequency Electromagnetic Field (Conducted)

Line voltage dips IEC61000-4-11:1994>95% dip for ½ cycle @ 50 Hz

Line voltage drop-out IEC61000-4-11:1994>95% dropout for 250 cycles @ 50 Hz

Basic Standard Test Specification

IEC61000-4-6:1996 0.15 - 80 MHz, 3V, 80% AM @ 1kHz

30% dip for 25 cycles @ 50 Hz

This product, if used properly in accordance with the user's instructions is neither dangerous for the consumer nor for the environment.

A signed copy of the Declaration of Conformity for this product can be obtained from Xerox.

Canadian Notice

This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus as described in the radio interference regulations of the Canadian Department of Communications.

Avis Canadien

Cet appareil numerique est conforme aux limites émission de bruits radioélectriques pour les appareils de classe B stipulés das le réglement sur le brouillage radioéletrique du Ministére des Communcations du Canada.

European Notice

This equipment was tested and is determined to be compliant with VDE requirements for a Class B device.

Hinweis

Hiermit wird bescheinigt, dass der Babe Laserdrucker, in bereinstimmung mit den Betimmunngen der Vfg 104ß 984 funkenstört ist. Der Deutschen Bundespost wurde das Inverkehrbringen dieses Gertëes angqeigt und die Berechtigung zur berprufung der Serie auf Einhaltung der Bestimmungen eingeräumt.

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General Information 1 - 1

The Phaser 7300 Color Printer Overview...............................................................1 - 2

Phaser 7300 Printer Configurations................................................................1 - 3

Printer Memory and RAM Capabilities..........................................................1 - 5

Parts of the Printer ..................................................................................................1 - 6

Print Engine Base Configuration ....................................................................1 - 6

Printer Options - Lower Tray Deck (LTD) and

Lower Tray Assembly (LTA) ......................................................................1 - 7

Printer Options (cont’d) - Duplex Unit...........................................................1 - 8

Front Panel Configuration ......................................................................................1 - 9

Front Panel LED indicators: ...........................................................................1 - 9

Image Processor (IP) Board Components ....................................................1 - 10

Rear Panel Configuration of the IP Board ....................................................1 - 11

DIP Switches ................................................................................................1 - 12

Printer Specifications............................................................................................1 - 13

Physical Dimensions - Print Engine .............................................................1 - 13

Physical Dimensions - Options.....................................................................1 - 13

Printer Clearances .........................................................................................1 - 13

Functional Specifications..............................................................................1 - 14

Print Speeds ..................................................................................................1 - 14

Electrical Specifications ...............................................................................1 - 15

Environmental Specifications .......................................................................1 - 15

Media and Tray Specifications .....................................................................1 - 16

Error Messages and Codes 2 - 19

Accessing Error Codes and Fault History ....................................................2 - 19

Error Messages and Codes Index .........................................................................2 - 20

Service Flowchart .................................................................................................2 - 24

Using the Troubleshooting Procedures.........................................................2 - 25

General Notes on Troubleshooting...............................................................2 - 25

Service Diagnostics ..............................................................................................2 - 26

Enter without rebooting the printer (Hidden Service Menu):.......................2 - 26

Enter by rebooting the printer:......................................................................2 - 26

Service Diagnostics Key Press and Function Table .....................................2 - 26

Service Diagnostics Tests and Functions Table............................................2 - 27

Error Messages and Codes Procedures.................................................................2 - 37

Contents xi

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Troubleshooting 3 - 67

System Boot Sequence......................................................................................... 3 - 68

Power On Self Test (POST)......................................................................... 3 - 68

Printer Malefactions or Inoperable Printer Problems .................................. 3 - 71

Verifying Power Supply Operation ..................................................................... 3 - 72

Measuring Power Supply Voltages.............................................................. 3 - 72

POWER Connector Pinout .......................................................................... 3 - 72

Safety interlocks .......................................................................................... 3 - 73

The +5 VDC Loop ....................................................................................... 3 - 74

To verify the +5 volt loop is complete:........................................................ 3 - 74

Fuser Roller Resistances .............................................................................. 3 - 75

Multi-Sheet Pick .......................................................................................... 3 - 76

Media Skewing ............................................................................................ 3 - 76

Operating System and Application Problems ...................................................... 3 - 77

Network Problems ............................................................................................... 3 - 78

Print-Quality Problems ........................................................................................ 3 - 79

Test Prints, Adjustments, and NVRAM Resets 4 - 111

Test Print Samples ............................................................................................. 4 - 112

Automatic Density Control (ADC) Calibration Procedure................................ 4 - 116

Automatic Thickness Sensor (ATS) Calibration Procedure .............................. 4 - 118

Color Calibration ....................................................................................... 4 - 121

Margin Calibration..................................................................................... 4 - 121

Resetting NVRAM ............................................................................................ 4 - 122

Cleaning and Maintenance 5 - 125

Recommended tools................................................................................... 5 - 125

Periodically Replaced Parts ............................................................................... 5 - 125

Service Preventive Maintenance Procedures..................................................... 5 - 126

Cleaning the LED Lens.............................................................................. 5 - 126

Cleaning the Pick and Feed Rollers ........................................................... 5 - 127

Cleaning the ADC Sensor.......................................................................... 5 - 127

Cleaning the Registration Sensor............................................................... 5 - 127

Cleaning the Contacts ................................................................................ 5 - 127

FRU Disassembly 6 - 129

Orientation of the Printer ................................................................................... 6 - 131

General Notes on Disassembly .................................................................. 6 - 131

Preparation ................................................................................................. 6 - 131

Work Notes ................................................................................................ 6 - 132

Notations in the Disassembly Text ............................................................ 6 - 132

About Screw Colors................................................................................... 6 - 132

Disassembly Procedures .................................................................................... 6 - 133

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Field Replaceable Units (FRU) Parts List 7 - 193

Using the parts list ..............................................................................................7 - 193

PL 1.0 - Covers ..........................................................................................7 - 194

PL 2.0 - MPT Pick Assembly .....................................................................7 - 196

PL 3.0 - Printer Control Components Boards.............................................7 - 198

PL 4.0 - Top Cover Inner Frame ................................................................7 - 200

PL 5.1 - Printer Unit Chassis (1 of 2) .........................................................7 - 202

PL 5.2 - Printer Unit Chassis (2 of 2) and Power Supplies ........................7 - 204

PL 6.1 - Paper Tray 1..................................................................................7 - 206

PL 6.2 - Lower Tray Deck & Lower Tray Assembly (Trays 2, 3, 4, 5) .....7 - 208

Kits......................................................................................................................7 - 210

Supplies and Accessories....................................................................................7 - 213

Manuals and CD’s ..............................................................................................7 - 213

Customer Replaceable Consumables..................................................................7 - 214

Paper and Media .........................................................................................7 - 215

Theory of Operation 8 - 219

Mechanical Process of the Printer ......................................................................8 - 220

Summary of the Printing Process .......................................................................8 - 221

Summary of the Paper Path ................................................................................8 - 226

Paper Fed from Tray 1 ................................................................................8 - 227

Paper Fed from Optional Trays ..................................................................8 - 228

Paper Fed from the Multi-Purpose Tray .....................................................8 - 229

Transfer Unit...............................................................................................8 - 230

Imaging Unit Up/Down Movement............................................................8 - 231

Transfer Unit Arm and Gear Up/Down Movement of the Imaging Units .8 - 232

Fuser and Paper Exit ...................................................................................8 - 233

Duplex Unit ................................................................................................8 - 234

Paper Jam Detection ...........................................................................................8 - 235

Paper Size Sensing......................................................................................8 - 236

Fuser Temperature Settings ................................................................................8 - 237

Cover Open Detection ........................................................................................8 - 238

Toner Detection ..................................................................................................8 - 239

Color Registration Detection ......................................................................8 - 241

Customer Replaceable Consumable Detection...........................................8 - 242

Customer Replaceable Consumable (CRC) Life Counter Behavior ..........8 - 242

Printer Components ............................................................................................8 - 244

Engine Controller Board Connectors..........................................................8 - 246

Sensors........................................................................................................8 - 248

Clutches, Motors and Solenoids .................................................................8 - 250

Wiring Diagrams 10 - 251

Contents xiii

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xiv Phaser 7300 Color Printer Service Manual

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General Information

The Xerox Phaser® 7300 Color Printer Service Manual is the primary document used for repairing, maintaining, and troubleshooting the printer.

To ensure a complete understanding of the product, Xerox recommends participation in Phaser 7300 printer service training.

The Phaser 7300 Color Printer Overview...............................................................................1 - 2

Phaser 7300 Printer Configurations........................................................................................1 - 3

Secure Prints, Proof Prints, Saved Prints and PDF Direct Printing........................................1 - 4

Power Saver Mode..................................................................................................................1 - 4

Printer Memory and RAM Capabilities..................................................................................1 - 5

Parts of the Printer ..................................................................................................................1 - 6

Print Engine Base Configuration ............................................................................................1 - 6

Printer Options - Lower Tray Deck (LTD) and Lower Tray Assembly (LTA) ....................1 - 7

Printer Options (cont’d) - Duplex Unit...................................................................................1 - 8

Front Panel Configuration ......................................................................................................1 - 9

Front Panel LED indicators: ...................................................................................................1 - 9

Image Processor (IP) Board Components ............................................................................1 - 10

Rear Panel Configuration of the IP Board ............................................................................1 - 11

DIP Switches ........................................................................................................................1 - 12

Printer Specifications ............................................................................................................1 - 13

Physical Dimensions - Print Engine .....................................................................................1 - 13

Physical Dimensions - Options.............................................................................................1 - 13

Printer Clearances .................................................................................................................1 - 13

Functional Specifications......................................................................................................1 - 14

Print Speeds ..........................................................................................................................1 - 14

Electrical Specifications .......................................................................................................1 - 15

Environmental Specifications ...............................................................................................1 - 15

Media and Tray Specifications .............................................................................................1 - 16

General Information 1 - 1

Page 18

The Phaser 7300 Color Printer Overview

S7300-05

Phaser 7300 Printer with Lower Tray Assembly (LTA) and Lower Tray Deck (LTD)

The Phaser 7300 Printer combines a 4-color, LED-based, tandem-design tabloid print engine, with an Xerox OPB Image Processor Board (IP) that supports Adobe’s PostScript Level 3 page description language. The IP Board features a bi-directional parallel interface. An optional Ethernet port for host communication is also available. The Ethernet port supports EtherTalk 10/100baseT, Novell and TCP/IP. All printer versions support the color PCL5c printer language.

A replaceable “Configuration Upgrade Chip” contains configuration information that enables or disables built-in features as described below to allow customer upgrades from7300B to 7300N models.

1 - 2 Phaser 7300 Color Printer Service Manual

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Phaser 7300 Printer Configurations

The printer is available in five configurations:

Features Printer Model

7300B 7300N 7300DN 7300DT 7300DX

Max print speed (see page 1-14) 30/37 30/37 30/37 30/37 30/37

Memory 128* 192* 192* 256* 384*

PostScript Fonts 136 Type 1 115 Central European Type 1

PCL5c 46 PCL fonts (more fonts are available with the optional internal hard drive)

Job Pipelining Std Std Std Std Std

Proof print, Secure print, Saved jobs Opt** Opt** Opt** Std Std

PDF Direct print Opt** Opt** Opt** Std Std

2400 dpi resolutions No Std Std Std Std

A3 Bleeds No Std Std Std Std

Job Collation Opt** Opt** Opt** St d Std

Auto-Duplex Opt Opt St d Std Std

Printer Cart Opt Opt Opt Opt N/A

550-Sheet Feeder (LTA) Opt Opt Opt Std Opt

1650-High-Capacity Feeder (LTD) Opt Opt Opt Opt Std

10/100 Ethernet Network Capable No Std Std Std Std

USB, Parallel Std Std Std Std Std

Optional Hard Drive Opt Opt Opt Std Std

* All configurations support 2 memory slots; the maximum memory is 512 Mbytes.

** Requires the optional internal hard drive.

136 136 136 136 136

Std Std Std Std Std

General Information 1 - 3

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Secure Prints, Proof Prints, Saved Prints and PDF Direct Printing

These features are available only if the printer has a hard drive installed.

Note: These jobs are stored on the printer’s optional hard drive and

remain in the printer even when it is powered off. There is a limit of 100 jobs on the hard drive, per type. When the printer reaches the limit, it deletes the oldest job per type automatically before adding the new one.

■ Secure Print: Print confidential documents. A 4-digit numeric

password-protected job is stored on the printer’s hard drive. The job prints only after entering the 4-digit number on the printer’s front panel.

■ Proof Print: Prints only one copy of a multiple copy job so the user can

proof the copy. The user assigns a job name to the print job and the first set is printed immediately for proofing. To print the remaining copies, select the job name on the printer’s front panel. If the user does not want the remaining copies the job can be cancelled from the printer’s front panel.

■ Saved Print: Stores jobs on the printer’s hard drive for print on demand.

■ PDF Direct Printing: The printer supports a native PDF image processor.

PDF Direct printing uses the printer’s currently defined imaging settings. Auto sensing of PDF files are included in the emulation sensing and switching logic when the PDF option is installed.

Power Saver Mode

To conserve power, the printer switches into Power Saver Mode after being idle for user-selected amount of time. The printer consumes less than 70 watts of power in Power Saver Mode. The printer leaves Power Saver Mode or “awakens” upon receiving data or user interaction at the front panel.

Resolutions: The printer supports the following resolutions:

■ 600 x 600 dpi (Draft/Standard Mode)

■ 600 x 2400 dpi (Enhanced Mode)

The printer also accepts 300 x 300 dpi files from PCL legacy drivers, PCL bit map fonts, and PCL bit map images, although these are imaged at 600 x 600 dpi.

The printer supports these optional lower tray combinations:

■ One 550-Sheet Feeder (LTA)

■ Two 550-Sheet Feeder

■ One 1650-Sheet High-Capacity Feeder (LTD)

■ One 550-Sheet Feeder and one 1650-Sheet High-Capacity Feeder

1 - 4 Phaser 7300 Color Printer Service Manual

Page 21

Printer Memory and RAM Capabilities

The printer features two memory slots each of which can contain a 64-, 128-, or 256-Mbyte, 144 pin, SODIMM modules. Any slot may be used for any memory size SODIMM. Therefore, slot combinations are allowed providing configurations of 128, 192, 256, 320, 384, and up to 512 Mbytes.

The image processor board also contains 16-kilobytes of non-volatile memory (NVRAM). NVRAM is used to store configuration values that can be set on the printer.

RAM modules have the following characteristics:

■ 144 pin SODIMM

■ Serial presence detect

■ 3.3 Volt

■ 100 MHz PC100 or 133 MHz PC133

The Startup Page and the Configuration Page list the amount of RAM installed in the printer.

If a SODIMM does not meet the image processor board’s specifications one of the following will occur:

■ POST fails and displays “RAM Error” on the front panel.

■ POST will continue, but the printer will display a soft fault “RAM DIMM

presence”.

■ The image processor board will not boot at all.

General Information 1 - 5

Page 22

Parts of the Printer

Print Engine Base Configuration

Base Configuration, right-front view

Item Description Table

No. Description No. Description

Top Output Tray

Top Cover

Front Panel

Power Switch

Duplex Unit (optional - shown closed)

Duplex Unit Release

Tray 1

Paper Level Gauge

Top Cover Release

Multi-Purpose Tray

Multi-Purpose Tray Release

Right Cover Door A

1 - 6 Phaser 7300 Color Printer Service Manual

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Printer Options - Lower Tray Deck (LTD) and Lower Tray Assembly (LTA)



7300-32

Item Description Table

No. Description No. Description

Tray 2

Tray 3

Tray 4

Tray 5

Lower Tray Assembly

550-sheet feeder (LTA)

Right Door B

Right Door C

Right Door D

Right Door E

Lower Tray Deck

1650 High-Capacity Feeder (LTD)



General Information 1 - 7

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Printer Options (cont’d) - Duplex Unit

Duplex Unit shown with Tray 1

1. Duplex Unit

■ The Duplex Unit attaches to the top of Tray 1.

7300-33

■ When opening the Duplex Unit, Tray 1 opens also to support the Duplex

Unit.

1 - 8 Phaser 7300 Color Printer Service Manual

Page 25

Front Panel Configuration

The Front Panel consists of one tricolor LED, a display window and six functional keys. These keys navigate the menu system, perform functions and select modes of operation for the printer.

Front Panel LED indicators:

■ Green = Ready to Print or Printing

■ Flashing Green = Receiving, Processing Data, Printing or Power Saver

Mode

■ Flashing Yellow = Warning

■ Flashing Red = Error

Phaser 7300

12345678

7300-27

Phaser 7300 Printer Front Panel Configuration

Front Panel Key Descriptions

LED (Power/Status)

Graphic front panel display

Cancel Key - cancels printing

Back Key - moves back to the

previous menu.

Up Arrow Key - scrolls up the menu

system

Down Arrow Key - scrolls down the

menu system

OK (select) Key

Information Key - for additional

explanation or help

Front Panel Shortcuts

Mode Press this selection at Power On

Skip execution of POST diagnostics OK

Print Service Diagnostics Map INFO

Reset PostScript NVRAM BACK+OK

Password Bypass UP+DOWN

Enter Service Diagnostics BACK+INFO

General Information 1 - 9

Page 26

Image Processor (IP) Board Components

21 3 4 5 6

S7300-152

No. Description

1 LED GI02 “health” : Flashes to indicate proper CPU

operation.

2 Hard Drive (optional)

3 Memory (RAM) SODIMM 1 and SODIMM 2

4 Configuration Upgrade Chip (“i” Button)

5 NVRAM

6 LED GI03: On indicates 10baseT connection and Off

indicates a 100baseT connection.

1 - 10 Phaser 7300 Color Printer Service Manual

Page 27

Rear Panel Configuration of the IP Board

S7300-173

No. Description

Image Processor Board Fan

DIP switches

USB Port

The ethernet port LED TD light is Off when the printer is connected to an ethernet

network. It blinks yellow while data is transmitted to the host

Ethernet Port (Not supported on the 7300B)

The ethernet port LED RD light is off when the printer is not connected to an

ethernet network. It blinks green when data is received from the host.

Parallel Port

General Information 1 - 11

Page 28

DIP Switches

Open Closed

4 3 2 1

Back

The DIP switches are defined as follows:

Mode Switch 1 Switch 2 Switch 3* Switch 4**

Customer Mode Open Open

Service Mode Open Closed

Developer Mode (no POST)

Disaster Recovery (Vx Works only) Closed Open

* Switch 3 selects whether PostScript (CLOSED) or Vx Works (OPEN) is available on the rear panel serial port.

** Switch 4 is an Image Processor CPU Reset switch, normally (OPEN). Do not leave in the (CLOSED) position.

Closed Closed

Front

S7300-173a

1 - 12 Phaser 7300 Color Printer Service Manual

Page 29

Printer Specifications

Physical Dimensions - Print Engine

Dimensions Specification

Height: 460 mm (18.1 in.)

Width: 666 mm (26.2 in.)

Depth: 626 cm (24.6 in.)

Weight: 68 kgs (149 lbs.)

Physical Dimensions - Options

Dimensions Specification

Optional 550-Sheet Feeder (Tray 2)

Width: 666 mm (26.2 in.)

Depth: 626 cm (24.6 in.)

Weight: 23 kgs (50 lbs.)

Optional 1650 Sheet High-Capacity Feeder (Trays 3 - 5)

Width: 666 mm (26.2 in.)

Depth: 626 cm (24.6 in.)

Weight: 74 kgs (163 lbs.)

Printer Clearances

70 cm

(28 in.)

42 cm

(16.5 in.)

42 cm

(16.5 in.)

42 cm

(16.5 in.)

General Information 1 - 13

20 cm (8 in.)

Page 30

Functional Specifications

Characteristic Specification

Printing process Electro-photographic, four color (CMYK) tandem transfer printing

Color medium Four toner cartridges, each contain one of four colors: cyan, magenta,

Resolution / Addressability

Operating Modes Running Mode: Print Engine capable of making prints immediately.

Warm-up time 30 seconds from cold start (power off condition)

Print Speeds

yellow or black. The toner is a nonmagnetic, monocomponent contact medium.

Standard and Draft 600 x 600 dpi (Factory Default)

Enhanced 600 x 2400 dpi*

* Not available on the Phaser 7300B. ** Not Available on the Phaser 7300B or Phaser 7300N.

Ready Mode: 15 seconds from completion of a print.

Power Saver Mode: Entered after a specified period of Print Engine inactivity since completion of the last print.

Print Mode (Color) Ltr / A4 Ltr/A4

Duplex

600 x 600 30/37 28/32 16/20 15/18

2400 x 600 16/16 16/16 9/9 9/9

Transparencies 10/15 N/A N/A N/A

Thick Card Stock Thin Card Stock

Envelopes

Glossy

Business Card

Greeting Card

CD/DVD Labels and Inserts

10/10 N/A 6/6 N/A

10/10 N/A N/A N/A

A3/Tabloid A3/Tabloid

Duplex

1 - 14 Phaser 7300 Color Printer Service Manual

Page 31

Electrical Specifications

Characteristic Specification

Primary line voltages 110 - 127 VAC (115 VAC nominal)

Primary voltage frequency range

Power consumption Peak: 1600 W

Primary voltage fusing 115 VAC configuration – 20 Amp

Frequency 50Hz or 60Hz +2%

Power Supplies Low-Voltage Power Supply

220 to 240 VAC (230 VAC nominal)

50 (48 to 52) or 60 (58 to 62) Hz

Normal Operation: 800 W Idle: 250 W Power Saver: 70 W

230 VAC configuration – 15 Amp

+5V Logic circuit power supply, LED

+34V Motor and drive voltage,

+12V High-voltage power supply, Paper

High-Voltage Power Supply

(CH) -1000 to -1400+50V Voltage to charge roller

(DB) -50 to -300V/+300V Voltage to developing roller

(SB) -300 to -450/0V Voltage to toner supply roller

(TR) C: 0 to 7KV

K,Y,M: 0 TO 6KV

Head

high-voltage power supply

thickness sensor power supply

Voltage to transfer unit (variable)

Environmental Specifications

Characteristic Specification

Temperature Operating Storage Transport

Humidity

Operating Storage Transport

Altitude Operating Non-operating

General Information 1 - 15

10 to 32 oC (50 to 89.6 oF)

0 to 43

-10 to 43

Relative Humidity (50 - 70% to assure the best print-quality)

20 - 80% 10 - 90% 10 - 90%

0 to 2500 m (8,000 ft.) at 25 oC 0 to 6000 m (20,000 ft.)

C (32 to 109.4 oF)

C (-14 to 109.4 oF)

Page 32

Environmental Specifications (cont'd.)

Characteristic Specification

Vibration/shock Operating

Non-Operating (vibration)

Non-operating (shock)

Acoustic Noise (operating) Standby: 45 dBa, Running: 54 dBa, Impulse: 57 dBa

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.

Media and Tray Specifications

Specification Supported

Printable Area

Supported Paper Sizes

Supported Paper Types And Weights

Minimum margins = 5 mm (0.2 in.) on all sides Maximum paper size = 304.8 mm x 914.40 mm (12 in. x 36 in.) Minimum paper size = 105 mm x 148 mm (4.13 in. x 5.83 in.)

Paper Type Size

Letter 8.5 x 11 in. Legal 8.5 x 14 in. Executive 7.25 x 10.5 in. Tabloid 11 x 17 in. Tabloid Extra 12 x 18 in. Statement 5.5 x 8.5 in. US Folio 8.5 x 13 in. A4 210 x 297 mm A3 297 x 420 mm SRA3 320 x 450 mm A5 148 x 210 mm A6 105 x 148 mm ISO B5 176 x 250 mm B5 JIS 182 x 257 mm B4 JIS 257 x 364 mm Custom Sizes Banner 12.9 x 36 in.

Typ e We igh t

Plain Paper 64 - 120 g/m2 (17 - 32 lb. Bond) Light Paper 64 - 75 g/m Medium Paper 75 - 90 g/m Medium Heavy Paper 90 - 105 g/m Heavy Paper 105 - 120 g/m Transparency Phaser® 35-Series ONLY Thin Card Stock 120 - 163 g/m Thick Card Stock 163 - 203 g/m Labels N/A Letterhead 64 - 120 g/m Glossy Coated Paper 120 - 163 g/m Business and Greeting Card N/A CD/DVD Labels and Inserts N/A

(17 - 20 lb. Bond)

(20 - 24 lb. Bond)

(24 - 28 lb. Bond)

(28 - 32 lb. Bond)

(44 - 60 lb. Cover)

(60 - 75 lb. Cover)

(17 - 32 lb. Bond)

(81 - 110 lb. Book

Tray(s)

Trays

All Trays All Trays All Trays All Trays All Trays MPT Only All Trays All Trays All Trays All Trays All Trays MPT / Tray 1 MPT Only All Trays All Trays MPT / Tray 1 MPT Only

All Trays MPT / Tray 1 MPT / Tray1 MPT / Tray 1 MPT / Tray 1 MPT / Tray 1 All Trays MPT Only MPT Only All Trays MPT / Tray 1 MPT Only MPT Only

1 - 16 Phaser 7300 Color Printer Service Manual

Page 33

Media and Tray Specifications (cont'd.)

Specification Supported

Supported Envelopes

Supported Weight:

20 - 24 lb. Bond

Tray Capacity

Commercial #10 4.12 x 9.5 in Monarch Envelope 3.87 x 7.5 in A7 Envelope 5.25 x 7.25 in Custom DL Envelope 110 x 220 mm C4 Envelope 229 x 324 mm C5 Envelope 162 x 229 mm C6 Envelope 114 x 162 mm B5 Envelope 176 x 250 mm

Use only paper envelopes. Do not use envelopes with windows or metal clasps.

Trays 1 - 5 MPT

Standard Paper 550 Sheets 100 Sheets

Transparency* 100 Sheets* 50 Sheets

Envelopes N/A 10 each

Tray(s )

All Envelopes print from the MPT Only

*Tray 1 / MPT only

General Information 1 - 17

Page 34

1 - 18 Phaser 7300 Color Printer Service Manual

Page 35

Error Messages and Codes

This section covers troubleshooting procedures for the Phaser 7300 printer’s front panel error messages and codes. Only jams and fatal errors will produce an associated alphanumeric code.

When an error first occurs, record the error message and code, then cycle power to the printer to see if the error reoccurs. Error messages and codes are generally specific, making it important that service personnel and users record errors exactly when reporting problems with the printer.

Some procedures require running service diagnostic test functions to verify a specific printer part is operating correctly. For information on Service Diagnostics and all internal printer test functions, see the table "Service Diagnostics" on page 2-26.

To troubleshoot problems and electrical failures not associated with a front panel message or code, refer to the section"Troubleshooting" on page 3-67.

If an error message or code is not visible on the front panel, the usage profile report and fault history list errors reported by the printer.

The lists can be accessed one of three ways:

Accessing Error Codes and Fault History

1. Print (if possible) the Usage Profile Report Log from the printer’s front panel

Support Menu. The fault history is detailed in this report log.

2. View the printer’s fault history on the front panel. a. Go to Support Menu --> Service Tools --> Fault History.

b. Any alphanumeric code associated with an error message or jam can

be viewed by pressing the Information key and scrolling to the bottom of the help text displayed on the front panel.

3. If the printer is connected to a network and has a TCP/IP address, view the

printer’s web page using a web browser.

a. Open a web browser.

b. Enter the printer’s IP address as the URL. c. Select the Troubleshoot link and the fault history is displayed.

Error Messages and Codes 2-19

Page 36

Error Messages and Codes Index

Error Code

Front Panel Message Usage

Profile

Page

Code

A6 Jam at Top Cover 6 2 - 37

A7 Jam at Top Cover 9 2 - 37

A10 Jam at Top Cover 11 2 - 37

A11 Jam at Door A 13 2 - 39

A22 Jam at Top Cover 12 or 13 2 - 37

B8 Jam at Duplex 10 2 - 41

B13 Jam at Duplex 8 2 - 41

B21 Jam at Door A 7 or 10 2 - 39

C1 Insert Tray 1 64 2 - 43

C2 Insert Tray 2 63 2 - 43

C3 Insert Tray 3 62 2 - 43

C4 Insert Tray 4 61 2 - 43

C5 Insert Tray 5 60 2 - 43

E1 Misfeed at Tray 1 1 2 - 42

E2 Misfeed at Tray 2 2 2 - 42

E3 Misfeed at Tray 3 3 2 - 42

E4 Misfeed at Tray 4 4 2 - 42

E5 Misfeed at Tray 5 5 2 - 42

E12 Top Output Tray is Full, Unload Paper 11 3 2 - 43

T1 Fuser Upper Failure 126 2 - 56

T2 Fuser Lower Failure 127 2 - 56

T29 Temp Sensor Failure 128 2 - 56

T30 RH Sensor Failure 129 2 - 57

T32 LED Over Temperature Failure 130 2 - 57

T34 IU Motor Overheating Failure 164 2 - 57

U0 Engine ROM Failure 131 2 - 58

U1 Engine RAM Failure 132 2 - 58

U2 Engine EEPROM Failure 133 2 - 58

U3 Engine EEPROM Missing Failure 134 2 - 58

U4 Engine SRAM Failure 135 2 - 58

2-20 Phaser 7300 Color Printer Service Manual

Page 37

Error Code

Front Panel Message Usage

Profile

Page

Code

U5 Engine Control Failure 136 2 - 58

U6 Power Supply Failure 137 2 - 58

U7 Feeder Home Failure 138 2 - 59

U8 Controller Fan Failure (Electrical Card Cage Fan) 139 2 - 59

U9 Power Supply Fan Failure 140 2 - 60

U12 Duplex Interface Failure 141 2 - 60

U13 Tray 3 Interface Failure 143 2 - 61

U14 Tray 2 Interface Failure 142 2 - 61

U16 Tray 4 Interface Failure 144 2 - 61

U17 Tray 5 Interface Failure 145 2 - 61

U18 Yellow LED Failure 146 2 - 61

U19 Magenta LED Failure 147 2 - 61

U20 Cyan LED Failure 148 2 - 61

U21 Black LED Failure 149 2 - 61

U26 Yellow Imaging Unit Failure 150 2 - 62

U27 Magenta Imaging Unit Failure 151 2 - 62

U28 Cyan Imaging Unit Failure 152 2 - 62

U29 Black Imaging Unit Failure 153 2 - 62

U30 Flash Hardware Failure 161 2 - 63

U31 Flash Software Failure 162 2 - 63

U32 Fuser Fan Failure 163 2 - 63

U33 Fuser 110v/220v Mismatch Failure 154 2 - 64

U34 Unsupported Duplex Unit ROM 169 2 - 64

U35 Unsupported Tray 2 ROM 165 2 - 64

U36 Unsupported Tray 3 ROM 166 2 - 64

U37 Unsupported Tray 4 ROM 167 2 - 64

U38 Unsupported Tray 5 ROM 168 2 - 64

W16 Fuse Cut Error in Fuser 155 2 - 65

W17 Fuse Cut Error in Transfer Unit 156 2 - 65

W18 Fuse Cut Error in Cyan Imaging Unit 159 2 - 65

W19 Fuse Cut Error in Magenta Imaging Unit 158 2 - 65

Error Messages and Codes 2-21

Page 38

Error Code

Front Panel Message Usage

Profile

Page

Code

W20 Fuse Cut Error in Yellow Imaging Unit 157 2 - 65

W21 Fuse Cut Error in Black Imaging Unit 160 2 - 65

Error Messages not associated with an alphanumeric code

Adjust Tray [1] Size 55 2 - 47

Adjust Tray [2] Size 56 2 - 47

Adjust Tray [3] Size 57 2 - 47

Adjust Tray [4] Size 58 2 - 47

Adjust Tray [5] Size 59 2 - 47

Replace Cyan Toner Cartridge 65 2 - 53

Replace Magenta Toner Cartridge 66 2 - 53

Replace Yellow Toner Cartridge 67 2 - 53

Replace Black Toner Cartridge 68 2 - 53

Replace Cyan Imaging Unit 69 2 - 52

Replace Magenta Imaging Unit 70 2 - 52

Replace Yellow Imaging Unit 71 2 - 52

Replace Black Imaging Unit 72 2 - 52

Replace Transfer Unit 73 2 - 55

Close Right Door A 74 2 - 49

Close Right Door B 75 2 - 49

Close Right Door C 76 2 - 49

Close Right Door D 77 2 - 49

Close Right Door E 78 2 - 49

Close Duplex Unit 79 2 - 49

Close Top Cover 80 2 - 48

Open Left Side Output Tray 81 2 - 50

Tray [1] Empty, Load Paper 95 2 - 44

Tray [2] Empty, Load Paper 96 2 - 44

Tray [3] Empty, Load Paper 97 2 - 44

Tray [4] Empty, Load Paper 98 2 - 44

Tray [5] Empty, Load Paper 99 2 - 44

2-22 Phaser 7300 Color Printer Service Manual

Page 39

Error Code

Front Panel Message Usage

Page

Profile

Code

MPT Empty, Load Paper 100 2 - 44

Load Tray [1] with [size*] [type*] 101 2 - 46

Load Tray [2] with [size*] [type*] 102 2 - 46

Load Tray [3] with [size*] [type*] 103 2 - 46

Load Tray [4] with [size*] [type*] 104 2 - 46

Load Tray [5] with [size*] [type*] 105 2 - 46

Load MPT with [size*] [type*] 106 2 - 45

Install or Reseat Toner Cartridge Cyan 114 2 - 53

Install or Reseat Toner Cartridge Magenta 115 2 - 53

Install or Reseat Toner Cartridge Yellow 116 2 - 53

Install or Reseat Toner Cartridge Black 117 2 - 53

Install or Reseat Cyan Imaging Unit 118 2 - 52

Install or Reseat Magenta Imaging Unit 119 2 - 52

Install or Reseat Yellow Imaging Unit 120 2 - 52

Install or Reseat Black Imaging Unit 121 2 - 52

Install or Reseat Fuser 122 2 - 54

Replace Fuser 123 2 - 54

Install or Reseat Transfer Unit 124 2 - 55

Humidity Too High to Print 125 2 - 51

Error Messages and Codes 2-23

Page 40

Service Flowchart

The Service Flowchart outlines one possible approach to troubleshooting and repair of the printer. The Service Flowchart is an overview of the path a service technician could

take, using this technical manual, to service the print engine and options. If you choose not to use the Service Flowchart, it is recommended that you start at the appropriate troubleshooting table and proceed from there.

Always follow the safety measures detailed in the front of the manual when servicing the printer. See “Service Safety Summary” on page vi of this manual.

Step 1: Identify the Problem:

1 Verify the reported problem does exist. 2 Check for any error codes and write them down. 3 Print normal customer prints and service test prints. 4 Make note of any print quality problems in the test prints. 5 Make note of any mechanical or electrical abnormalities present. 6 Make note of any unusual noise or smell coming from the printer. 7 Print a Usage Profile Report, if the printer is able to print. 8 View the fault history under the Service Tools Menu 9 Verify the AC input power supply is within proper specifications by measuring the

voltage at the electric outlet while the printer is running.

Step 2: Inspect and Clean the Printer:

1 Switch OFF printer power. 2 Disconnect the AC power cord from the wall outlet. 3 Verify the power cord is free from damage or short circuit and is connected properly. 4 Remove the Imaging Unit and protect it from light. 5 Inspect the printer interior and remove any foreign matter such as paper clips,

staples, pieces of paper, dust or loose toner.

■ Do not use solvents or chemical cleaners to clean the printer interior.

■ Do not use any type of oil or lubricant on printer parts.

■ Use only a type II approved toner vacuum.

6 Clean all rubber rollers with a lint-free cloth, dampened slightly with cold water and

mild detergent.

7 Inspect the interior of the printer for damaged wires, loose connections, toner

leakage, and damaged or obviously worn parts.

8 If a toner cartridge appears obviously damaged, replace with a new one.

Step 3: Find the Cause of the Problem:

1 Use the Error Messages and Codes and troubleshooting procedures to find the

cause of the problem. 2 Use Diagnostics to check printer and optional components. 3 Use the Wiring Diagrams to locate test points. 4 Take voltage readings at various test points as instructed in the appropriate

troubleshooting procedure. 5 Use the Service Test Prints to isolate problems with the Image Processor Board.

Step 4: Correct the Problem

1 Use the Parts List to locate a part number 2 Use the Removal and Replacement Procedures to replace the part.

Step 5: Final Checkout

1 Test the printer to be sure you have corrected the initial problem and there are no

additional problems present.

2-24 Phaser 7300 Color Printer Service Manual

Page 41

Using the Troubleshooting Procedures

1. Each Step in a Troubleshooting Procedure instructs you to perform a certain action

or procedure. The steps are to be followed sequentially in the order given until the problem is fixed or resolved.

2. The Actions and Questions box contains additional information and/or additional

procedures you must follow to isolate the problem.

3. When a procedure instructs you to test a component using service diagnostics, See

“Service Diagnostics” on page 2-26 for the detailed steps and functions for testing parts of the printer.

4. The action is followed by a question. If your response to the question is “Ye s ” ,

then follow the instructions for a “Ye s ” reply. If your response to the question is “No”, then follow the instructions for a “No” reply.

5. Troubleshooting Procedures may ask you to take voltage readings or test for

continuity at certain test points within the printer. For detailed diagrams, refer to the section "Wiring Diagrams" on page 10-251 for complete information on test point locations and signal names.

6. Troubleshooting Procedures often ask you to replace a printer component. The

section "FRU Disassembly" on page 6-129 provides detailed steps for removing and replacing all major parts of the printer. The section "Field Replaceable Units (FRU) Parts List" on page 7-193 details the location, quantity and part number for all spared parts of the printer.

General Notes on Troubleshooting

1. Unless indicated otherwise, the instruction “cycle power to the printer” means for

you to switch OFF and then back ON the printer power and let the printer proceed through POST to a ‘Ready’ condition.

2. When instructed to take voltage, continuity or resistance readings on wiring

harnesses, refer to the wiring diagrams for specific locations not called out in a procedure.

3. All voltage values given in the troubleshooting procedures are approximate values.

The main purpose of voltage readings is to determine whether or not a component is receiving the correct voltage value from the power supply and if gating (a voltage drop) occurs during component actuation. Gating signals may be nothing more than a pulse, resulting in a momentary drop in voltage that may be difficult or impossible to read on the average multi-meter.

4. When a troubleshooting procedure instructs you to replace a non-spared

component and that component is part of a parent assembly, you should replace the entire parent assembly.

Error Messages and Codes 2-25

Page 42

Service Diagnostics

The Phaser 7300 Color Printer has built-in diagnostics to aid in troubleshooting problems with the printer. The Service Diagnostics Menu provides a means to test sensors, motors, switches, clutches, fans and solenoids. Diagnostics also contain built-in test prints, adjustments and calibrations, printer status and some NVRAM access and resets.

Service diagnostics are to be executed by a service technician only, through the front panel. Service Diagnostics can be entered one of two ways:

Enter without rebooting the printer (Hidden Service Menu):

1. From the printer’s main menu, scroll to the Support Menu, press OK and then

scroll to the

2. Hold down the Up Arrow key and press the Down Arrow key.

3. Scroll to Run Diagnostics and press OK.

Enter by rebooting the printer:

1. Turn the printer power OFF.

2. Hold down the Back and Information keys simultaneously and turn the printer

back ON.

3. Continue to hold the keys until the following message is displayed on the front

panel: the keys.

4. The front panel displays the Service Diagnostics Menu.

Service Tools Menu and press OK.

Service Diagnostics V#.##, Initializing..., and then release

You can print a Service Diagnostics Menu Map by highlighting Print Service

Diagnostics Menu Ready. You will then need to re-enter service diagnostics.

, and press OK. The printer will run through POST and return to

Service Diagnostics Key Press and Function Table

Key Function

BACK Returns to the prior higher level menu structure, if available.

If help text is displayed on the front panel, pressing BACK will restore the current menu item and remove the help text.

CANCEL Terminates the current test. Cancels current INFO display.

INFO Provides help information, if available.

Pressing INFO again restores the current menu item and removes the help text.

UP Scrolls up one menu item within a menu list. This control does not ‘wrap’.

Used to increment data in tests requiring user input.

DOWN Srolls down one menu item within a menu list.

This control does not ‘wrap’, the end of a menu list is designated by three asterisks.

Used to decrement data in tests requiring user input.

OK Enters the highlighted menu. Executes the current test item.

2-26 Phaser 7300 Color Printer Service Manual

Used to accept a data value entered by the user.

Page 43

Service Diagnostics Tests and Functions Table

Menu Item Front Panel Display Results Functional Definition

Print Service Menu Map - Prints the service diagnostics menu map, exits

diagnostics, runs POST and returns printer to Ready.

General Status - Displays user-selected engine information.

Engine Status

Jam Status

Engine Board ROM Version

Printer Configuration

Ambient Temperature/ Humidity

Fuser Temperature

Consumable Status

Front Panel Control

Engine Version is n.n.n Duplex Version is n.n.n Tray 2 Version is n.n.n Tray 3 Version is n.n.n Tray 4 Version is n.n.n Tray 5 Version is n.n.n

Memory: nnnMB

Hard Drive is Present/Absent

Duplex is Present/Absent

Tray 1-n Installed

Amb. Temp. is nnn deg.C (Celsius)

Amb. Hum. is nnn % (relative percent)

Fuser Temp Upper is nnn deg.C Fuser Temp Lower is nnn deg.C Fuser (UpperSide) is nnn deg.C

■ Total Pages

■ Fuser Unit Life (total sheets)

■ transfer unit Life (total images)

■ Black IU Life (total images)

■ Yellow IU Life (total images)

■ Cyan IU Life (total images)

■ Magenta IU Life (total images)

■ Black Toner Life (% used)

■ Yellow Toner Life (% used)

■ Magenta Toner Life (% used)

■ Cyan Toner Life (% used)

Contras:t

Current Contrast: n

Intensity:

Current Intensity: n

No Status to Report = the printer is online and ready to print.

Error Message = Displays an error message that will prevent printing. Status is displayed sequentially, one line at a time.

Jam @ indicates the original reason for the jam, only 1 should be listed. Jam2 @ Engineering use only.

Displays the engine firmware version, duplex version and trays 2, 3, 4, and 5 versions, if installed.

Displays current memory installed. Detects presence of Hard Drive option. Detects presence of Duplex option. Detects presence of Tray 1,2,3,4,5.

Displays the current Temperature and Humidity for the printer.

Displays engine reported upper, lower and upper-side fuser temperature in degrees Celsius <press Back or Cancel to abort>

Displays current consumable life counts.

Contrast range n is 1 - 10 Intensity range n is 0 - 10

Error Messages and Codes 2-27

Page 44

Service Diagnostics Tests and Functions Table (cont'd.)

Menu Item Front Panel Display Results Functional Definition

Test Prints - Prints test prints stored on the Engine Controller Board. The prints are used by

service personnel to identify, repair and validate the operability of the printer. Used to isolate print problems to the engine or Image Processor by eliminating the normal image data transfer process from the Image Processor Board to the Engine Controller Board.

Execute Print

Select page Count

Select Test Patterns

Select Media Source

Select Color /Monochrome

<Engine Temperature> P=nnn T=nnn U=nnn[nnn] H=nn% L=nnn[nnn]

<Engine Transfer Voltages> KTR=n.nn KV MTR=n.nn KV YTR=n.nn KV CTR=n.nn KV

<Engine Transfer Resistances KR=n.nn uA MR=n.nn uA YR=n.nn uA CR=n.nn uA

<Engine Media Thickness> Thick=nn um Temp=nn degC Regist=nnnh Exit=nnnh

Test print Cancelled <if cancelled> Please wait...

Engine Delivering Pages Please wait...

Engine Page Count: nnn

Please wait...

Page Count set to n

Blank Pattern Color Registration Adjust Pattern Gray Pattern Thin Lines Pattern Color Stripes Pattern

Please wait...

Source Tray: n -or- MPT

Please wait...

Set to Tray n -or- MPT

Select: Color / Monochrome

Please wait...

Color Mode set to Color/Monochrome

Not used here

P=Sheets T=Ambient Temp. U=Upper Fuser Temp[Setpoint] H=Ambient Hum. % L=Lower Fuser Temp[Setpoint]

Transfer voltage set values (KV) for each color.

Transfer roller resistance values (micro Amps) for each color.

Thick=Media thickness (microns) Temp=Fuser Temp(deg.C) Regist=Regist Motor speed Exit=Exit Motor Speed

0000 means continuous printing. <press Cancel to terminate printing>

Note: If Duplex mode is on and the user enters an odd number of pages, the next higher even number of pages will be set.

These are print engine generated test prints that bypass the Image Processor Board.

2-28 Phaser 7300 Color Printer Service Manual

Page 45

Service Diagnostics Tests and Functions Table (cont'd.)

Menu Item Front Panel Display Results Functional Definition

Select Duplex /Simplex

Select Job Offset

Select Output Path

Select Duplexing: On/Off

Please wait...

Duplex is set to On/Off

Select Offset: On/Off

Please wait...

Offset set to On/Off

Select: Face Down/Face Up

Please wait...

Output set to Face Down/Face Up

Controls how print jobs are staggered in the top tray.

Controls how print jobs are delivered, face-up or face-down

Motors/Fans Tests - Tests the functionality of motors and fans by giving service

personnel the ability to energize/de-energize the motors and fans one at a time.

Tray Feed Motors

Registration Motor A

Registration Motor B

Imaging Unit Motors (CMYK)

Imaging Unit Up/Down

Tray 1 Feed Motor

<if installed> Tray 2 Feed Motor Tray 3 Feed Motor Tray 4 Feed Motor Tray 5 Feed Motor

Tray Feed Motor On/Off

Motor is On/Off <Press OK to start motor>

Remove MPT Media!

Motor is On/Off

If MPT media present, will jam

[Black] [Yellow] [Magenta] [Cyan] IU Motor is On/Off

Motor is On/Off <Press OK to start motor>

The tray must be removed to run this test.

Remove the appropriate Imaging Unit before proceeding with the test.

After removing the IU, defeat the interlock switch, then resume the test.

Error Messages and Codes 2-29

Page 46

Service Diagnostics Tests and Functions Table (cont'd.)

Menu Item Front Panel Display Results Functional Definition

transfer unit Motor

Fuser Unit Motor

Duplex Unit Motor

Job Offset

Transfer Motor is On/Off Remove all the Imaging Units

Fuser Motor Forward

Fuser Motor is On/Off

Fuser Motor Reverse

Fuser Motor is On/Off

Fuser Motor Release

Fuser Motor is On/Off

Motor is On/Off

before proceeding with the test.

Defeat the top cover interlock switch, then resume the test.

Motor

Chassis Fan

Rear Fuser

Fan is On/Off

Fan

Top Fuser Fan

Fan is On/Off

Sensor/Switch Tests - Tests the functionality of the sensors and switches by giving

service personnel the ability to input state changes and observe proper function.

Interlock Switches

Tray 1 Switches

Tray 2, 3, 4 Switches (Optional)

MPT Tray Switches

Top Cover Interlock

Top Cover is Open/Closed

Right Door Interlocks

Door A is Open/Closed Door B is Open/Closed Door C is Open/Closed Door D is Open/Closed Door E is Open/Closed

Tray is Empty / Not Empty,

Low / Not Low

Lift is H/L, Hop is H/L, Feed H/L

Size: SW 1=H/L 2=H/L 3=H/L 4=H/L

5=H/L <media name>

MPT Roller Home is Home/Not Home

MPT Empty switch is Paper/No Paper

MPT OHP is Paper/Transparency

Note: Media name is one of: Letter-SEF, A6-SEF, 11x17-SEF, A3nobi-SEF, Executive-SEF, Legal14-SEF, A3-SEF, B4-SEF, A4-SEF, A5-SEF, Letter-LEF, A4-LEF, B5-SEF, Legal13-SEF, B5-LEF, Tray Missing

See “Paper Size Sensing” on page 8-236 for more information.

Actuate and Deactuate the switch.

2-30 Phaser 7300 Color Printer Service Manual

Page 47

Service Diagnostics Tests and Functions Table (cont'd.)

Menu Item Front Panel Display Results Functional Definition

Registration Entrance Sensor

MPT Entrance Sensor

transfer unit Entrance Sensor

Fuser Exit Sensor

Face-Up Door Switch

Stack Full Sensor

Duplex Unit Sensors

Color Registration Sensor

Density Sensor

Media Weight Sensor

Fuser Temp Sensors

Ambient Tem p/Hum Sensor

CMYK LED Temp Sensor

CMYK IU Sensor

Registration is Media Present / Not Present

MPT Entrance Paper is Present / Not Present

transfer unit Paper is Present / Not Present

Fuser Exit Paper is Present / Not Present

Face Up door is Open / Closed

Stack Full is Full / Not Full

Entrance Paper is Present / Not Present

Middle Paper is Present / Not Present

Exit Paper is Present / Not Present

Color Reg. Front is nnnh

Color Reg. Rear is nnnh

Density is nnnh ENGINEERING USE ONLY

Media Weight is nnnh ENGINEERING USE ONLY

Fuser Temp Upper is nnn deg.C

Fuser Temp Lower is nnn deg.C

Fuser Temp (UpperSide) is nnn deg.C

Amb. Temp. is nnn deg.C

Amb. Hum. is nnn %

Black Temp is nnn (adc)

Yellow Temp is nnn (adc)

Magenta Temp is nnn (adc)

Cyan Temp is nnn (adc)

Cyan is Present / Missing

Magenta is Present / Missing

Yellow is Present / Missing

Black is Present / Missing

Toggle the actuator to change sensor state.

ENGINEERING USE ONLY

See “Fuser and Paper Exit” on page 8-233 for information regarding Fuser temperature ranges.

See “Environmental Specifications” on page 1-15 for the optimal printer operating range.

ENGINEERING USE ONLY

Remove the Imaging Unit and defeat the top cover interlock switch and depress the 3-pins to change state.

Error Messages and Codes 2-31

Page 48

Service Diagnostics Tests and Functions Table (cont'd.)

Menu Item Front Panel Display Results Functional Definition

CMYK Toner Cart Sensor

Read Fuses

Black Missing / Installed

Yellow Missing / Installed

Magenta Missing / Installed

Cyan Missing / Installed

Fuser is Cut / Not Cut

TBelt is Cut / Not Cut

CIU is Cut / Not Cut

MIU is Cut / Not Cut

YIU is Cut / Not Cut

KIU is Cut / Not Cut

Toggle the actuator to change sensor state.

Clutch Tests - Tests the functionality of the clutches by activating one component at a time.

Test runs for 10 seconds or until the test is aborted.

Tray 1 Feed Clutch

(Optional) Tray 2, 3, 4 Feed Clutch

Feed Roller 1 Clutch

Feed Roller 2, 3, 4, 5 Clutch

Reg Roller A Clutch

Right Duplex Clutch

Left Duplex Clutch

Clutch is On/Off

Listen carefully to hear the clutch engage.

Solenoid Tests - Tests the functionality of the solenoids by activating one component at a

time. Test runs for 10 seconds or until the test is aborted.

Registration

Shutter is Open/Closed

Shutter Solenoid

Exit Gate Solenoid (Duplex)

Face-Up Gate

Solenoid is On/Off

Solenoid (Top/Side Output Tray)

2-32 Phaser 7300 Color Printer Service Manual

Page 49

Service Diagnostics Tests and Functions Table (cont'd.)

Menu Item Front Panel Display Results Functional Definition

Adjustments/Calibrations - Performs adjustments, calibrations or operations essential

to the performance of the printer. For complete walk-through procedures, refer to the section "Test Prints, Adjustments, and NVRAM Resets" on page 4-111.

(ADC) Auto Density Control - Density Calibration: Verifies ADC operation, replacement ADC tag number is entered, then the operation is tested. The following functions are all part of the Auto Density Control.

Edit Density Data - Enter the last two digits from the tag number that is attached to the underside of the Color Registration Shutter.

Current Tag Number: nnnnnnnnhh

Change Tag Number?

Yes No

Enter Tag Number: nnnnnnnnhh <Press Up/Down to change>

Tag Number set to nnhh <Press Back or Cancel to abort>

Execute Density Calibration - Density Calibration: Engine is prepared for calibration run, and the ADC operation is verified.

Density Adj. Test Passed / Failed <Press Back or Cancel to abort>

Density Calibration Results - Results from Calibration run during this power on session.

Passed / Calibration Error / Density Sensor Error / Density Shutter Error / Density ID Error / Unknown Error

YMC: V=nnn DAC=nnH KP: V=nnn DAC=nnH RD: V=nnn DAC=nnH

(ATS) Auto Thickness Sensor ATS 4-Sheet Calibration - Verifies ATS operation. Test requires 4 sheets of premeasured

media. Media is picked from the MPT. See “Automatic Thickness Sensor (ATS) Calibration Procedure” on page 4-118 for the detailed procedure. The following tests are all part of the ATS Thickness Sensor.

Edit Thickness Data - Thickness Calibration: Premeasured media thickness can be entered here in units of mils or microns, the calibration procedures use Microns.

Select Thickness Units

Mils Microns

Enter Thickness: xxx Microns Default thickness is 140 microns.

Find the tag number on the bottom of the Registration Shutter.

Enter the last two digits (hh)

Example: YMC: V=120 D: V=130 RD: V=119

Microns are used in test examples.

Error Messages and Codes 2-33

Page 50

Service Diagnostics Tests and Functions Table (cont'd.)

Menu Item Front Panel Display Results Functional Definition

Execute Thickness Calibration - Thickness Calibration: Engine is prepared for calibration

run, then media is picked from the MPT. Cycle power to the printer if repeated failures are encountered.

Test Fault <if unexpected results occur>

Media Feed Sheet n

Thickness Calibration Passed / Failed

Thickness Calibration Results - Thickness Calibration: Results from calibration run during this power on session.

Curr MPT/Tray1 Thick = nnn um

No extended data to display

- or -

Cal. Result: Passed / Non-Paper ADC Error / Thickness Error / Slant Error / Sensor ADC Error / Sensor Failure / Unknown

The next data screens are information screens. While viewing the data, press Info... press Info again to see data. <Press Back or Cancel to exit>

Paper Thickness: 1=nnn um 2=nnn um 3=nnn um CHK=nnn um

Measured Paper Thickness in microns. <Press Info for help> <Press Back or Cancel to exit>

Calc. Values: (mV/um) 1=n.n 2=n.n 3=n.n AVE=n.n

No Paper Samples: 1=nnV, 2=nnV, 3=nnV, CHK=nnV

Paper Samples: 1=nnV, 2=nnV, 3=nnV, CHK=nnV,

No Paper Average: 1=nnV, 2=nnV, 3=nnV, CHK=nnV

Paper Average: 1=nnV, 2=nnV, 3=nnH, CHK=nnV

Corr. Sens. = n.n mV/um <Press Back or Cancel to exit>

Where 1.40mV/micron is the standard sensivity value.

Measured samples without and with media present in sensor. No-Paper Samples = 3.33V.

Measured averages without and with media present in sensor. No-Paper Average = 3.33V

The corrected sensitivity after calibration (in mVolts/microns).

2-34 Phaser 7300 Color Printer Service Manual

Page 51

Service Diagnostics Tests and Functions Table (cont'd.)

Menu Item Front Panel Display Results Functional Definition

ATS Gauge Calibration - Verifies ATS Calibration. FOR ENGINEERING USE ONLY.

Edit Gauge Data

Execute Gauge Measurement

Gauge Measurement Results

ATS Anvil Adjustment- Adjust anvil and read media voltage. See “Automatic Thickness

Sensor (ATS) Calibration Procedure” on page 4-118 for procedures on adjusting the ATS Anvil.

Enter Thickness: nn Microns <Press Down for more data>

Insert thickness gauge, then press OK

Test Fault - try again!

Gauge Calibration Passed / Failed You may need to cycle power

Cal. Result: Passed / Non-Paper ADC Error / Thickness Error / Slant Error / Sensor ADC Error / Sensor Failure / Unknown

Calc. Values: (mV/um) 1=n.n 2=n.n 3=n.n AVE=n.n

No Paper Samples: 1=nnV, 2=nnV, 3=nnV, CHK=nnV

Paper Samples: 1=nnV, 2=nnV, 3=nnV, CHK=nnV,

No Paper Average: 1=nnV, 2=nnV, 3=nnV, CHK=nnV

Paper Average: 1=nnV, 2=nnV, 3=nnH, CHK=nnV

Anvil Measure: V=n.nn

FOR ENGINEERING USE ONLY

Where 1.40mV/micron is the standard sensivity value.

Measured samples without and with media present in sensor. No-Paper Samples = 3.33V.

Measured averages without and with media present in sensor. No-Paper Average = 3.33V

NVRAM Access - This menu lets you read, set or reset selected NVRAM address

locations.

PostScript NVRAM Reset

CRU Counter Read

PostScript will now reset NVRAM

Are you sure? Yes No

Exiting Service Diagnostics

Total Pages = nnn Fuser pages = nnn Trans.Belt Images = nnn

Restores the printers setup values to their factory defaults. For more information on resetting NVRAM, See “PostScript NVRAM Resets” on page 4-122.

Error Messages and Codes 2-35

Page 52

Service Diagnostics Tests and Functions Table (cont'd.)

Menu Item Front Panel Display Results Functional Definition

IUs: Y = nnn images M = nnn images C = nnn images K = nnn images

Toner: Y = nnn % used M = nnn % used C = nnn % used K = nnn % used

CRU Counter Resets: Resets the selected Customer Replaceable Consumable count on the engine. This resets the image count only, not the pixel count.

Reset Toner Counts

Reset IU Counts

Reset Fuser Count

Reset transfer unit Count

Reset Black Toner Count

Resetting Toner Count

Reset Yellow Toner Count

Resetting Toner Count

Reset Magenta Toner Count

Resetting Toner Count

Reset Cyan Toner Count

Resetting Toner Count

No Reset

Reset Black IU Count

Resetting IU Count

Reset Yellow IU Count

Resetting IU Count

Reset Magenta IU Count

Resetting IU Count

Reset Cyan IU Count

Resetting IU Count

No Reset

Reset Fuser Count? Y / N

Resetting Fuser Count

Reset transfer unit Count? Y / N

Resetting transfer unit Count

ENGINEERING USE ONLY

IP Controller Diagnostics - Tests the basic functionality of the Image Processor Board.

RAM Read/Write Test

Executing..... <approx. 6 seconds per

256MB>

Passed / Failed

Performs an extended memory test on the Image Processor Board.

Note: Cycle power to the printer after executing this test.

Exit - Exits service diagnostics to PostScript without running power on self test.

2-36 Phaser 7300 Color Printer Service Manual

Page 53

Error Messages and Codes Procedures

Jam at Top Cover

A6: Jam at the MPT or under Imaging Units. A7: Jam at Fuser Exit. A10: Jam at output area. A22: Jam in the paper feed path, including under the Imaging Units.

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Ensure the correct weight and type of

paper is loaded in the tray.

See “Media and Tray Specifications” on page 1-16 for approved media types and weights.

2 Check the Registration Rollers and

Transfer Unit for any spilled toner or obstructions.

3 Check the fuser for fuser wrap, debris or

contamination.

Remove the Fuser covers and ensure the thermistors are not broken or dislodged.

4 Check the following rollers for excessive

wear, and clean to free from dirt or debris:

MPT Pick Rollers Eject Guide Assembly Rollers Fuser Rollers Exit Rollers Feeder Assembly Rollers Registration Rollers and grounding strap

Did this fix the problem?

5 Inspect the following actuators for

damage and use service diagnostics to test the sensor operation:

MPT Entrance Sensor Registration Entrance Sensor Fuser Exit Sensor Transfer Unit Entrance Sensor

Do the actuators and sensors operate correctly?

Go to step [2]. Load approved

Clean and remove any obstruction in the paper path.

Complete

Replace the Fuser. Go to step [4].

Go to step [5]. Replace the

Go to step [8]. Replace the

media and run a set of test prints through the printer.

If a jam still occurs, go to step [2].

Go to step [3].

appropriate roller assembly.

problem actuator

For a problem sensor, go to step [6]

Error Messages and Codes 2-37

Page 54

Troubleshooting Procedure Table (cont'd.)

Steps Actions and Questions Yes No

6 Check the sensor for debris that could

interfere with normal operation.

Is there debris present?

7 Verify the wiring harness for the problem

sensor is free from damage or defects.

8 Use service diagnostics to test the

following:

Exit Gate Solenoid (Duplex) Face-up Solenoid (Top-Side Output)

Do the solenoids operate correctly?

9 Visually inspect the Registration Rollers

for gaps between rollers and ensure the grounding strap is in place properly.

Is there a gap between the Registration Rollers?

10 Use service diagnostics to test the

following motors/clutches.

Main Feed Motor Transfer Unit Motor Registration Motor Registration Clutch Fuser Motor

Does the motor/clutch function correctly?

11 Inspect the wiring harness for each motor

and clutch.

Are the wiring harnesses properly connected and free from defects?

Clean the sensor or remove debris.

Replace the sensor.

Go to step [9]. Replace the

Replace the Registration Roller Assembly.

Replace the Engine Controller Board.

Go to step [7].

Replace the wiring harness.

solenoid.

Go to step [10].

Go to step [11].

Replace the wiring harness and/or the problem motor/clutch.

2-38 Phaser 7300 Color Printer Service Manual

Page 55

Jam at Door [A] [B] [C] [D] [E]

A11: Jam at Door A B21: Jam at Duplex Unit

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Ensure the correct weight and type of

paper is loaded in the tray.

See “Media and Tray Specifications” on page 1-16 for approved media types and weights.

2 Check in and around the Registration

Rollers, Imaging Units, Duplex Unit and Transfer Unit for any dirt, spilled toner, or debris.

3 Verify the door reporting the error

condition closes fully.

Is the door damaged or warped?

4 Clean the pick and feed rollers for the

problem tray:

Did this fix the problem?

5 Inspect the paper tray and pick area to

see if the paper is picked and feeds correctly from the tray.

6 Use service diagnostics to test the Hop

and Feed sensors for the problem tray.

Do the sensors function correctly?

7 Inspect the following actuators for

damage and use service diagnostics to test the sensors operation:

Registration Entrance Sensor Transfer Unit Entrance Sensor

Do the actuators and sensors operate correctly?

8 Check the sensor for debris that could

interfere with normal operation.

Is there debris present?

9 Verify the wiring harness for the problem

sensor is free from damage or defects.

Go to step [2]. Load approved

Remove any obstruction in the paper path.

Complete

Replace the damaged door.

Go to step [5]. Replace the

Go to step [6]. Replace the paper

Go to step [7]. Replace the Feed

Go to step [10]. Replace the

Clean the sensor or remove debris.

Replace the sensor.

media and run a set of test prints through the printer.

If a jam still occurs go to step [2].

Go to step [3].

Go to step [4].

problem roller.

Tray or Feed Assembly.

Assembly.

problem actuator

For a problem sensor: Go to step [8]

Go to step [9].

Replace the wiring harness.

Error Messages and Codes 2-39

Page 56

Troubleshooting Procedure Table (cont'd.)

Steps Actions and Questions Yes No

10 Use service diagnostics to test the tray

feed motor and clutch.

Note: Feed rollers located behind each right door are driven by the feed motor in the tray below.

Example: The feed rollers behind Right Door A are driven by the tray 2 feed motor.

Does the motor/clutch operate correctly?

11 Verify the wiring harness for the problem

motor is free from damage or defects.

Check the wiring to the LTA Controller Board for lower trays.

Is the wiring free from damage or defects?

12 Use service diagnostics to test the Duplex

Unit motor and clutches.

Does the motor/clutch function correctly?

13 Inspect the wiring harness for the Duplex

Unit.

Is the wiring harness properly connected and free from defects?

14 Use service diagnostics to test the

Registration Motor and Registration Clutch.

Does the motor/clutch function correctly?

15 Inspect the wiring harness for each motor

and clutch.

Are the wiring harnesses properly connected and free from defects?

16 Visually inspect the Registration Rollers

for gaps between the rollers and ensure the grounding strap is in place properly.

Is there a gap between the Registration Rollers?

17 Check the connections from the Tray to

the Engine Controller Board and/or LTA Controller Board.

Go to step [12]. Replace the Feed

Go to step [14]. Go to step [13].

Replace the Duplex Unit.

Go to step [16]. Go to step [15].

Replace the Engine Controller Board.

Replace the Registration Roller Assembly.

Replace the Engine Controller Board.

Replace the LTA Controller Board.

Assembly for a bad clutch.

For a bad motor go to step [11].

Assembly for the problem Tray.

Replace the LTA Controller Board.

Replace the Engine Controller Board.

Replace the problem wiring harness, clutch or motor.

Go to step [17].

Replace the wiring harnesses.

2-40 Phaser 7300 Color Printer Service Manual

Page 57

Jam at Duplex Unit

B8: Jam inside Duplex Unit. B13: Jam inside Duplex Unit.

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Ensure the correct weight and type of

paper is loaded in the tray.

See “Media and Tray Specifications” on page 1-16 for approved media types and weights.

2 Check for and remove any dirt, debris or

obstructions in the paper path around the Duplex Unit.

Did this correct the problem?

3 Clean and check the Duplex Unit’s rollers.

Do the rollers move freely and are free of dirt or debris?

4 Use Service Diagnostics to ensure the

Duplex Unit Entrance, Middle and Exit actuators and sensors are functioning correctly.

5 Use service diagnostics to test the duplex

motor and right and left duplex clutches.

Do the motors and clutches function correctly?

6 Inspect the duplex unit’s wiring harness. If

defective, replace the wiring harness.

Is the harness properly seated and free from defects?

Go to step [2]. Load approved

Complete Go to step [3].

Go to step [4]. Replace the

Go to step [5]. Replace the

Go to step [6]. Replace the

Replace the Engine Controller Board.

media and run a set of test prints through the printer.

If a jam still occurs go to step [2].

Duplex Unit.

Replace the Duplex Unit.

Error Messages and Codes 2-41

Page 58

Misfeed at Tray [1] [2] [3] [4] [5]

E1: Tray 1 E2: Tray 2 E3: Tray 3 E4: Tray 4 E5: Tray 5

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Ensure the correct weight and type of

paper is loaded in the tray.

See “Media and Tray Specifications” on page 1-16 for approved media types and weights.

2 Inspect the tray for damage or defects

and ensure the tray is inserted and properly connected.

3 Inspect the pick and feed rollers for dirt,

debris, defects or excessive wear.

4 Use service diagnostics to test the Tray

Feed Motor and feed clutch.

Do the motor and clutch operate correctly?

5 Check the wiring from the Feed Motor

and feed clutch to the Engine Controller Board (Tray 1) or to the LTA Controller Board (Tray 2, 3, 4, 5).

Is the wiring free from damage or defects?

6 Visually inspect and use service

diagnostics to check the tray hop sensor is operating correctly.

Go to step [2]. Load approved

Go to step [3]. Install or replace

Clean or replace the pick rollers.

Go to step [6]. Go to step [5].

Replace the Tray Feed Assembly or Feed Motor.

Tray 1 - Replace the Engine Controller Board.

Tray 2, 3, 4, 5 Replace the LTA Controller Board.

media and run a set of test prints through the printer.

If a jam still occurs go to step [2].

tray.

Go to step [4].

Replace the wiring harness.

Replace the Feed Assembly.

2-42 Phaser 7300 Color Printer Service Manual

Page 59

Insert Tray [1] [2] [3] [4] [5]

C1: Tray 1 C2: Tray 2 C3: Tray 3 C4: Tray 4 C5: Tray 5

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Ensure the tray is properly installed and

seated correctly.

2 Inspect the tray for damage or defects. Replace the Tray. Go to step [3].

3 Use service diagnostics to test the paper

size sensors.

Do the sensors function correctly?

4 Check the wiring from the paper size

sensing board to the Engine Controller Board or the LTA Controller Board.

Is the wiring free from damage or defects?

Go to step [2]. Reseat the Paper

Replace the Tray. Go to step [4].

Tray 1 - Replace the Engine Controller Board.

Tray 2, 3, 4, 5 Replace the LTA Controller Board.

Tray.

Replace the wiring harness.

E12: Top Output Tray is Full, Unload Paper

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Visually inspect the Stack Full Actuator

and use service diagnostics to test the Stack Full Sensor.

Does the sensor and actuator operate correctly?

2 Check Pin 6 OPTN cable at the Engine

Controller Board for +5 volts.

3 Check the Stack Full Sensor wiring

harness to the Toner Sensor Board Pin 3 for +5 volts.

4 Check for +5 volts at Pin 6 OPTN cable to

the Toner Sensor Board.

Go to step [3]. Replace the

Replace the Engine Controller Board.

Go to step [4]. Replace the Stack

Replace the ribbon cable (OPTN)

actuator if broken.

If the sensor is not working, go to step [2}.

Go to step [3].

Full Sensor and wiring.

Replace the Toner Sensor Board.

Error Messages and Codes 2-43

Page 60

MPT Empty, Load Paper

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Visually inspect the MPT Actuator.

Is the actuator damaged?

2 Use service diagnostics to check the MPT

Empty sensors.

Does the sensor operate correctly?

3 Is the MPT Empty Sensor wiring harness

free from defects?

4 Load media into the MPT.

Check the wiring harness from the MPT to the Engine Controller Board MPT LOADED Pin 2 for 0 volts.

Replace the MPT Pick Assembly.

Go to step [4]. Go to step [3].

Go to step [4]. Replace the MPT

Replace the Engine Controller Board.

Tray [1] [2] [3] [4] [5] Empty, Load Paper

Troubleshooting Procedure Table

Go to step [2].

Empty Sensor and wiring harness.

Replace the MPT Pick Assembly.

Steps Actions and Questions Yes No

1 Ensure the paper is loaded correctly in

the tray and that the guides are snug against the paper.

2 Use service diagnostics to test the Tray

Empty Sensor.

Does the sensor operate correctly?

3 Verify the tray lift motor is functioning by

loading approved media in the tray and closing.

Visually inspect the paper level indicator on the side of the tray for movement.

Is the lift functioning correctly?

4 Verify +34 volts are supplied to the tray lift

motor.

Go to step [2]. Reload the paper

Go to step [3]. Replace the

Replace the Engine Controller Board.

Replace the Feeder Assembly.

and reset the guides.

Feeder Assembly.

Go to step [4].

Replace the Engine Controller Board.

2-44 Phaser 7300 Color Printer Service Manual

Page 61

Load MPT with [size] [type]

Note: This is a media mis-match error.

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Ensure the correct weight and type of

paper is loaded in the tray.

See “Media and Tray Specifications” on page 1-16 for approved media types and weights.

2 Verify the orientation of the paper loaded

in the MPT is correct and matches the front panel and driver settings.

3 Use service diagnostics to test the MPT

Entrance Sensor and Actuator.

Does the sensor operate correctly and does the actuator move freely?

4 Check the wiring harness for damage or

defects.

Is the wiring harness free from defects?

5 Use service diagnostics to test the MPT

OHP sensor.

Does the sensor function correctly?

6 Check the MPT OHP sensor wiring

harness at the Engine Controller Board pin 5 REG connector for +5 volts

Go to step [2]. Load approved

Go to step [3]. Change the

Go to step [5]. For a broken

Replace the MPT Pick Assembly

Replace the Engine Controller Board.

Replace the MPT Pick Assembly.

media and run a set of test prints through the printer.

If an error still occurs, go to step [2].

orientation of the paper.

actuator, replace the MPT Pick Assembly.

For a sensor, go to step [4].

Replace the wiring harness.

Go to step [6].

Replace the Engine Controller Board.

Error Messages and Codes 2-45

Page 62

Load Tray [1] [2] [3] [4] [5] with [size] [type]

Note: This is a media mis-match error.

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Verify the paper loaded in the tray is the

correct size and the orientation matches the front panel and driver settings.

2 Verify the guides in the tray are set snug

against the paper loaded in the tray.

3 Swap trays (2, 3, 4 or 5) and try printing

again.

Note: If the error is for tray 1 you cannot swap this tray, go on.

Does the problem move with the tray?

4 Inspect the paper size plate on the back

of the tray.

Does the plate move while adjusting the tray guides?

5 Use service diagnostics to test the paper

size sensors.

Do the sensors function correctly?

6 Check the wiring from the paper size

sensing board to the Engine Controller Board or the LTA Controller Board.

Is the wiring free from damage or defects?

7 Use service diagnostics to test the MPT

OHP sensor.

Does the sensor function correctly?

8 Check the MPT OHP sensor wiring

harness at the Engine Controller Board pin 5 REG connector for +5 volts

Go to step [2]. Match the

Go to step [3]. Set the guides

Replace the tray. Go to step [4].

Go to step [5]. Replace the tray.

Go to step [7]. Go to step [6].

Replace the Paper Size Sensing Board.

Replace the Engine Controller Board.

Replace the MPT Pick Assembly.

orientation of the paper and settings.

properly.

Replace the wiring harness.

Go to step [8].

Replace the Engine Controller Board.

2-46 Phaser 7300 Color Printer Service Manual

Page 63

Adjust Tray [1] [2] [3] [4] [5] Size

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Verify the paper loaded in the tray is the

correct size and the orientation matches the front panel and driver settings.

2 Verify the guides in the tray are set snug

against the paper loaded in the tray.

3 Swap trays (2, 3, 4 or 5) and try printing

again.

Note: If the error is for tray 1 you cannot swap this tray, go on.

Does the problem move with the tray?

4 Inspect the paper size plate on the back

of the tray.

Does the plate move while adjusting the tray guides?

5 Use service diagnostics to test the paper

size sensors.

Do the sensors function correctly?

6 Check the wiring from the paper size

sensing board to the Engine Controller Board or the LTA Controller Board.

Is the wiring free from damage or defects?

Go to step [2]. Match the

Go to step [3]. Set the guides

Replace the tray. Go to step [4].

Go to step [5]. Replace the tray.

Replace the Engine Controller Board.

Replace the Paper Size Sensing Board.

orientation of the paper and settings.

properly.

Go to step [6].

Replace the wiring harness.

Error Messages and Codes 2-47

Page 64

Close Top Cover

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Cycle power to the printer and open and

close the top cover.

Does the error still appear?

2 Use service diagnostics to test the top

cover interlock switch.

Does the switch operate correctly?

3 Visually inspect the switch for defects,

damage or possible debris which could prevent the printer for recognizing the top cover is closed.

Is the switch free from defects?

4 Check to see if the Top Cover actuator,

located on the Top Cover Inner frame, is broken or damaged.

Is the actuator damaged or broken?

5 Close the top cover and verify +34 volts

on the Engine Controller Board at the COVOPEN Pin 1.

6 Check for +34 volts on the Engine

Controller Board at the COVOPEN Pin 3.

7 Verify the Low Voltage Power Supply to

the Power connector on the Engine Controller Board is supplying +34 volts to pins 12, 13, and 14.

Go to step [2]. Complete

Go to step [3]. Go to step [5].

Go to step [4]. Clean or replace

Replace the Top Cover Inner Frame.

Go to step [6]. Go to step [7].

Replace the Engine Controller Board.

the Top Cover Interlock Switch.

Replace the Engine Controller Board.

Replace the Top Cover Interlock Switch.

Replace the Low Voltage Power Supply and/or wiring harness.

2-48 Phaser 7300 Color Printer Service Manual

Page 65

Close Duplex Unit

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Is the Duplex Unit installed correctly and

properly seated?

2 Remove the Duplex Unit and cycle power

to the printer.

Does the error message still appear?

3 Visually inspect the connector on the

back of the Duplex Unit for damage.

4 Visually inspect the mating connector on

the Printer Unit Chassis for damage.

5 Inspect the Duplex Unit’s wiring harness.

If defective, replace the wiring harness.

Is the harness properly seated and free from defects?

Go to step [2]. Reseat the

Replace the Engine Controller Board.

Replace the Duplex Unit.

Replace the connector.

Replace the Engine Controller Board.

Close Right Door A

Troubleshooting Procedure Table

Duplex Unit.

Go to step [3].

Go to step [4].

Go to step [5].

Replace the Duplex Unit.

Steps Actions and Questions Yes No

1 Inspect the Door A actuator for damage

or defects.

2 Inspect the Right Door A Switch for

damage, defects or obstructions.

3 Use service diagnostics to test the Right

Cover Door A Interlock Switch.

Does the switch function correctly?

4 Close Door A and check for +5 volts at

pin 3 of the STDUCOV on the Engine Controller Board.

Replace the Right Cover Door A.

Replace the Door A Interlock Switch.

Replace the Engine Controller Board.

Replace the wiring harness and/or Door A Interlock Switch.

Go to step [2].

Go to step [3].

Go to step [4].

Replace the Engine Controller Board.

Error Messages and Codes 2-49

Page 66

Close Right Door [B] [C] [D] [E]

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Inspect the door actuator for damage or

defects.

2 Inspect the door switch for damage,

defects or obstructions.

3 Use service diagnostics to test the switch.

Note: Switch tests for all the doors are located under the Interlock Switches Menu.

Does the switch function correctly?

4 Close the door and check for +5 volts at

pin 3 of the STDUCOV on the LTA Controller Board.

Replace the Tray Go to step [2].

Replace the Switch.

Replace the Engine Controller Board.

Replace the wiring harness and/or Switch.

Open Left Side Output Tray

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Inspect the switch for damage, defects or

obstructions.

2 Use service diagnostics to test the switch.

Does the switch function correctly?

3 Close the door and check for +5 volts at

pin 1 of the STDUCOV on the Engine Controller Board.

Replace the Switch.

Replace the Engine Controller Board.

Go to step [3].

Go to step [4].

Replace the LTA Controller Board.

Go to step [2].

Go to step [3].

Replace the wiring harness and/or Switch.

2-50 Phaser 7300 Color Printer Service Manual

Page 67

Humidity Too High to Print

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Use service diagnostics to verify the

printers current operating humidity.

Is the printer operating within the humidity specifications?

See “Environmental Specifications” on page 1-15

2 Use service diagnostics to verify the

printers current operating humidity.

For example: If the printer is reporting 100% humidity, the sensor is not functioning correctly.

Is the sensor operating correctly?

Go to step [2]. Advise the

Replace the Engine Controller Board.

customer on humidity specifications.

Replace the Temp/Humidity Sensor Board.

Error Messages and Codes 2-51

Page 68

Install or Reseat [CMYK] Imaging Unit

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Is the Imaging Unit installed and seated

properly?

2 If the keys are not set properly on the

Imaging Units they may not seat properly.

Are the keys on the side of the Imaging Units correctly set?

3 Visually inspect the Imaging Unit Contact

Assembly and springs.

Are the contacts free from damage and debris?

4 Use service diagnostics to test the CMYK

IU Sensor.

Does the sensor function correctly?

5 Verify continuity between the IU Sensor

Board and the Engine Controller Board at the JODEN connector.

Y pin 9 to pin 12 M pin 1 to pin 3 C pin 5 to pin 6 K pin 10 to pin 13

6 Check the wiring for defects and proper

connection.

Go to step [2]. Reseat the

Go to step [3]. Reset the keys

Go to step [4]. Clean or replace

Replace the Engine Controller Board.

Replace the wiring harness

Imaging Unit.

properly.

the Imaging Drum Contact Assembly.

Go to step [5].

Go to step [6].

Replace the Back Plate Assembly.

Replace [CMYK] Imaging Unit

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Cycle power to the printer and ensure all

error messages are cleared.

Did the error reappear?

2 Use service diagnostics, or print a

Supplies Page, to verify if the Imaging Unit is at or near end-of-life?

Note: If the Imaging Unit count is reset using service diagnostics, the gas gauge will not return to 100% because pixel counts are not reset.

3 Install a new Imaging Unit and check to

see if the fuse blew after installation.

2-52 Phaser 7300 Color Printer Service Manual

Go to step [2]. Complete.

Have the customer replace the Imaging Unit.

Replace the EEPROM on the Engine Controller Board.

Go to step [3].

Replace the Engine Controller Board.

Page 69

Install or Reseat [CMYK] Toner Cartridge

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Has all the tape and packaging material

been removed from the Toner Cartridge?

2 Is the Toner Cartridge installed and

seated properly?

3 Remove the toner cartridge and tap on a

hard surface to break up any compacted toner in the toner cartridge.

Reinstall the toner cartridge.

Does the error still appear?

4 Verify the toner sensor magnets are

properly seated in the toner sensor actuators.

Are the magnets seated properly?

5 Use service diagnostics to check the

CMYK Toner Cartridge Sensor.

Does the sensor function correctly?

6 Is the toner sensor board wiring harness

free from defects and securely connected?

Go to step [2]. Remove the

Go to step [2]. Reseat the Toner

Go to step [4]. Complete.

Go to step [5]. Replace the Toner

Replace the Engine Controller Board.

material.

Cartridge.

Sensor Actuator.

Go to step [6].

Replace the wiring harness or Toner Sensor Board.

Replace [CMYK] Toner Cartridge

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Is the toner cartridge installed and seated

properly and all packaging material has been removed?

2 Use service diagnostics to verify if the

Toner Cartridge is at or near end-of-life?

3 Remove the toner cartridge and tap on a

hard surface to break up any compacted toner in the toner cartridge.

Reinstall the toner cartridge.

Does the error still appear?

4 Remove the toner cartridge and visually

check to see if there is toner in the cartridge.

Is the toner cartridge empty?

Error Messages and Codes 2-53

Go to step [2]. Reseat the toner

Replace the toner cartridge)

Go to step [4]. Complete.

Have the customer replace the Toner Cartridge.

cartridge or remove packing material.

Go to step [3].

Replace the Engine Controller Board.

Page 70

Install or Reseat Fuser

Steps Actions and Questions Yes No

1 Is the Fuser Unit installed and seated

properly?

2 Visually inspect the Fuser latches.

Are the latches damaged or defective?

Go to step [2]. Reseat the Fuser.

Replace the Fuser latches.

Replace Fuser

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Use service diagnostics to check the

Fuser life.

Is the fuser at or near end-of-life?

2 Verify that all other errors have been

cleared on the printer and install a new fuser.

Did the fuse on the new Fuser blow?

Have the customer replace the Fuser.

Replace the Engine Controller Board EEPROM.

Replace in the following order:

Fuser

Engine Controller Board

Low Voltage Power Supply and wiring harness.

Go to step [2].

Replace in the following order:

Fuser

Engine Controller Board

Low Voltage Power Supply and wiring harness.

2-54 Phaser 7300 Color Printer Service Manual

Page 71

Install or Reseat Transfer Unit

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Is the transfer unit installed and seated

properly?

2 Check the Transfer Unit voltage contacts

for corrosion, dirt or debris.

Go to step [2]. Reseat the

Clean with a pencil eraser.

Replace Transfer Unit

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Use service diagnostics to check the life

of the Transfer Unit.

Is the Transfer Unit at or near end-of-life?

2 Verify that all other errors have been

cleared on the printer and install a new Transfer Unit.

Did the fuse blow?

3 Check the wiring harness from the

Imaging Unit Sensing Board to the Engine Controller Board.

Is the wiring defective?

Have the customer replace the Transfer Unit.

Replace the Engine Controller Board EEPROM.

Replace the wiring harness.

transfer unit.

Replace in the following order:

Engine Controller Board.

High Voltage Power Supply and wiring harness.

Go to step [2].

Go to step [3].

Replace the Engine Controller Board.

Error Messages and Codes 2-55

Page 72

T1: Fuser Upper Failure T2: Fuser Lower Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Reseat the Fuser Unit.

Did the error reappear?

2 Check the resistance of the lamps.

See “Fuser Roller Resistances” on page 3-75

3 Check the Fuser thermistors.

Are the thermistors damaged or misaligned, not in contact with the rollers?

4 Is there AC voltage to the low voltage

power supply CN1 connector?

Go to step [2]. Complete

Go to step [3]. Replace the

Replace the Fuser. Go to step [4].

Replace the Engine Controller Board.

T29: Temp Sensor Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Use Service Diagnostics to check the

current ambient humidity inside the printer.

Verify proper operation of the sensor by blowing on it.

Is the sensor operating correctly? See “Environmental Specifications” on page 1-15.

Is the printer operating temperature within its optimal range?

Replace the Te mp / Hu mi d it y Sensor Board

Replace the Engine Controller Board.

Fuser.

Replace Low Voltage Power Supply.

Notify customer of the environmental specifications.

2-56 Phaser 7300 Color Printer Service Manual

Page 73

T30: RH Sensor Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Use Service Diagnostics to check the

current ambient humidity inside the printer.

Is the sensor operating correctly? See “Environmental Specifications” on page 1-15.

Is the printer operating humidity within its optimal range?

Replace the Temp/Humidity Sensor Board.

Replace the Engine Controller Board.

T32: LED Over Temperature Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Check for proper clearances around the

printer and ensure proper fan operation.

1 Verify the ribbon cables and wiring

harness to the LED are properly seated and not crimped or damaged down to the Engine Controller Board.

Go to step [2]. Advise customer

Reseat or replace damaged wiring harness.

Notify customer of the environmental specifications.

on clearance for the printer.

Replace an inoperable fan.

Replace in the following order: LED

Engine Controller Board.

T34: IU Motor Overheating Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Cycle power to the printer.

Does the error still appear?

2 Inspect the Electrical Card Cage Fan for

proper operation and adequate airflow.

Is the fan operating and installed correctly?

Error Messages and Codes 2-57

Go to step [2]. Complete.

Replace the Engine Controller Board.

Replace the Electrical Card Cage Fan.

Page 74

U0: Engine ROM Failure U1: Engine RAM Failure U2: Engine EEPROM Failure U3: Engine EEPROM Missing Failure U4: Engine SRAM Failure U5: Engine Control Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Cycle power to the printer.

Does the error still appear?

2 Perform an NVRAM Reset.

Does the error still appear?

Go to step [2]. Complete

Replace the EEPROM for U2 or U3 errors.

Replace the Engine Controller Board.

U6: Power Supply Failure

Complete

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Visually inspect the LVPS fans for proper

operation and airflow.

Are the fans operating correctly?

2 Verify +34 volts is being supplied to fuse

F7 on the Engine Controller Board.

Is there +34 volts?

3 Verify the Low Voltage Power Supply to

the POWER connector on the Engine Controller Board is supplying +34 volts to pins 12, 13, and 14.

4 Turn the printer off, remove the Duplex

Unit, then turn the printer back on.

Does the error still appear?

Go to step [4]. Go to step [2].

Replace the fan. Go to step [3].

Replace the Engine Controller Board.

Replace in the following order:

Transfer Unit LVPS HVPS Engine Controller Board.

Replace the Low Voltage Power Supply and/or wiring harness.

Replace the Duplex Unit.

2-58 Phaser 7300 Color Printer Service Manual

Page 75

U7: Feeder Home Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Visually inspect the MPT Liftplate by

printing a job to the MPT.

Does the liftplate operate correctly?

2 Use service diagnostics to check the

registration motor.

Is the motor operating correctly?

3 Use service diagnostics to test the MPT

Roller Home sensor.

Does the sensor function correctly?

4 Inspect the wiring harness to the MPT.

Is the wiring harness defective?

Go to step [3]. Go to step [2].

Replace the MPT Pick Assembly.

Replace the Engine Controller Board.

Replace the wiring harness.

Replace the Registration Motor.

Go to step [4].

Replace the Engine Controller Board.

U8: Controller Fan Failure (Electrical Card Cage)

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Visually inspect the Electrical Cage Fan

operation and airflow.

Does the fan operate correctly?

2 Inspect the wiring harness to the fan.

Is the wiring harness defective?

3 Verify +34 volts is being supplied to fuse

F7 on the Engine Controller Board.

Is there +34 volts?

Replace the Engine Controller Board.

Replace the Electrical Cage Fan.

Replace the Engine Controller Board.

Go to step [2].

Go to step [3].

Replace the Low Voltage Power Supply.

Error Messages and Codes 2-59

Page 76

U9: Power Supply Fan Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Visually inspect the front and rear LVPS

fans for proper operation and airflow.

Run service diagnostics to test the Rear Fuser Fan.

Do the fans operate correctly.

2 Verify +34 volts is being supplied to fuse

F7 on the Engine Controller Board.

Is there +34 volts?

3 Verify the Low Voltage Power Supply to

the POWER connector on the Engine Controller Board is supplying +34 volts to pins 12, 13, and 14.

Replace the Engine Controller Board.

Replace the defective fan and wiring harness.

Replace the Engine Controller Board.

U12: Duplex Interface Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Remove the Duplex Unit and cycle power

to the printer.

Does the error still appear?

2 Inspect the Duplex Unit and connector.

Is the connector damaged or defective?

3 Inspect the wiring harness from the

Duplex Unit to the Engine Controller Board for defects.

Replace the Engine Controller Board.

Replace the Duplex Unit.

Replace Engine Controller Board

Go to step [2].

Go to step [3].

Replace the Low Voltage Power Supply and/or wiring harness.

Go to step [2].

Go to step [3].

Replace wiring harness or connector.

2-60 Phaser 7300 Color Printer Service Manual

Page 77

Tray [2] [3] [4] [5] Interface Failure

U14: Tray 2 U13: Tray 3 U16: Tray 4 U17: Tray 5

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Cycle power to the printer.

Does the error still appear?

2 Check each of the lower tray connectors

between the LTA Controller Board(s) and the Engine Controller Board.

Is there continuity between the wiring harness?

Go to step [2]. Complete

Replace in the following order:

LTA Controller Board

Engine Controller Board

Replace the problem wiring harness or connector.

[Yellow] [Magenta] [Cyan] [Black] LED Failure

U18: Yellow U19: Magenta U20: Cyan U21: Black

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Cycle power to the printer.

Does the error still appear?

2 Try to isolate the problem LED Head by

swapping with another LED Head.

Does the error move with the LED Head?

3 Ensure the wiring harness to the LED

Head is properly connected and not damaged, misaligned or crimped.

Is the wiring harness defective?

4 Check continuity between the Toner

Sensor Board and the Engine Controller Board.

Is there continuity?

Go to step [2]. Complete

Replace the LED Head.

Reconnect or replace wiring harness.

Replace the Engine Controller Board.

Go to step [3].

Go to step [4].

Replace the Toner Sensor Board and/or Wiring Harness.

Error Messages and Codes 2-61

Page 78

[Yellow] [Magenta] [Cyan] [Black] Imaging Unit Failure

U26: Yellow U27: Magenta U28: Cyan U29: Black

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Is the Imaging Unit installed and seated

properly?

Go to step [2]. Reseat the

imaging unit.

2 Visually inspect the Imaging Unit Drum

Contact Assembly and springs.

Are the contacts damaged or dirty?

3 Use service diagnostics to test the CMYK

IU Sensor.

Does the sensor function correctly?

4 Verify continuity between the IU Sensor

Board and the Engine Controller Board at the JODEN connector.

Y pin 9 to pin 12 M pin 1 to pin 3 C pin 5 to pin 6 K pin 10 to pin 13

5 Check the wiring harness.

Is the wiring harness defective?

6 Use service diagnostics to check the IU

Up/Down motor.

Is the Transfer Unit functioning properly by lifting the Imaging Unit?

7 Visually inspect the Transfer Unit gears

and lifting arm.

See “Transfer Unit Arm and Gear Up/Down Movement of the Imaging Units” on page 8-232.

The gears should lift the arm when rotated in one direction and stop rotating.

Does the gear stop rotating when the arm is in the raised position?

8 Check the appropriate fuse on the Engine

Controller Board to see if it is blown.

Cyan = F5 Magenta = F2 Yellow = F 3 Black = F4

Replace the IU Drum Contact Assembly.

Go to step [6} Go to step [4].

Replace the Engine Controller Board.

Replace the wiring harness

Go to step [11]. Go to step [7].

Go to step [8]. Replace the

Go to step [10]. Go to step [9].

Go to step [3].

Go to step [5].

Replace the Back Plate Assembly.

Transfer Unit.

2-62 Phaser 7300 Color Printer Service Manual

Page 79

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

9 Verify the Low Voltage Power Supply to

the POWER connector on the Engine Controller Board is supplying +34 volts to pins 12, 13, and 14.

10 Check the Imaging Unit wiring harness.

Is the wiring harness defective?

11 Inspect the Printer Unit Chassis for

warping or damage.

Replace the Imaging Unit Motor.

Replace the wiring harness.

Replace the Printer Unit Chassis.

U30: Flash Hardware Failure U31: Flash Software Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Cycle power to the printer.

Does the error reappear?

Replace the Engine Controller Board.

Replace the Low Voltage Power Supply and/or wiring harness.

Replace the Engine Controller Board.

Complete

U32: Fuser Fan Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

2 Verify +34 volts is being supplied to fuse

F7 on the Engine Controller Board.

Is there +34 volts?

3 Verify +34 volts is being supplied to fuse

F7 on the Engine Controller Board.

Is there +34 volts?

4 Verify the Low Voltage Power Supply to

the POWER connector on the Engine Controller Board is supplying +34 volts to pins 12, 13, and 14.

Error Messages and Codes 2-63

Replace the defective fan and wiring harness.

Replace the Engine Controller Board.

Go to step [2].

Go to step [3].

Replace the Low Voltage Power Supply and/or wiring harness.

Page 80

U33: Fuser 110v/220v Mismatch Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Ensure the proper Fuser (110v vs. 220v)

is installed in the printer.

Is the correct Fuser installed?

Replace the Engine Controller Board.

Have the customer replace the Fuser Unit.

U34: Unsupported Duplex Unit ROM Failure

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Verify the correct Phaser 7300 Duplex

Unit is installed.

2 Check that the Duplex Unit is correctly

installed and fully seated.

Go to step [2]. Replace the

Replace in the following order: Duplex Unit.

Engine Controller Board.

Duplex Unit.

Reseat the Duplex Unit

Unsupported Tray [2] [3] [4] [5] ROM Failure

U35: Tray 2 U36: Tray 3 U37: Tray 4 U38: Tray 5

Note: The printer has detected an incompatible LTA or LTD

assembly.

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Verify the correct Phaser 7300 LTA or

LTD is installed.

Replace in the following order:

LTA Controller Board

Engine Controller Board

Replace the tray.

2-64 Phaser 7300 Color Printer Service Manual

Page 81

W16: Fuse Cut Error in Fuser

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Install a new Fuser and verify the fuse

blows.

Does the error still appear?

2 Check the wiring harness between the

LVPS to the POWER connector on the Engine Controller Board.

Is there a short in the wiring harness?

Go to step [2]. Complete

Replace the wiring harness.

W17: Fuse Cut Error in Transfer Unit

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Install a new Transfer Unit and verify the

fuse blows.

Does the error still appear?

2 Check the JODEN wiring harness

between Imaging Unit Sensor Board and Engine Controller Board.

Is there a short in the wiring harness?

Go to step [2]. Complete

Replace the wiring harness.

Replace in the following order: Engine Controller Board

LVPS

Replace in the following order: Engine Controller Board

Replace the Back Plate w/Drive Gear.

Fuse Cut Error in [CMYK] Imaging Unit

W18: Cyan W19: Magenta W20: Yellow W21: Black

Troubleshooting Procedure Table

Steps Actions and Questions Yes No

1 Install a new Imaging Unit and verify the

fuse blows.

Does the error still appear?

2 Check the Imaging Unit Contacts (3-pin)

for shorts, damage or defects.

Are the contacts defective?

3 Check the wiring from the Imaging Unit

Sensor Board to the Engine Controller Board.

Is the wiring shorted or damaged?

Error Messages and Codes 2-65

Go to step [2]. Complete

Replace the Imaging Unit Contacts.

Replace the wiring harness and Back Plate w/Drive Gears

Go to step [3].

Replace the Engine Controller Board.

Page 82

2-66 Phaser 7300 Color Printer Service Manual

Page 83

Troubleshooting

This section is for troubleshooting electrical, print-quality, media jams and paper path problems not associated with an error message or code. For information on troubleshooting error codes and messages, see “Error Messages and Codes” on page 2-19.

System Boot Sequence .........................................................................................................3 - 68

Power On Self Test (POST) .................................................................................................3 - 68

Printer Malfunctions or Inoperable Printer Problems...........................................................3 - 71

Verifying Power Supply Operation ......................................................................................3 - 72

Measuring Power Supply Voltages ......................................................................................3 - 72

POWER Connector Pinout ...................................................................................................3 - 72

Safety interlocks ...................................................................................................................3 - 73

The +5 VDC Loop ................................................................................................................3 - 74

Fuser Roller Resistances .......................................................................................................3 - 75

Multi-Sheet Pick ...................................................................................................................3 - 76

Media Skewing .....................................................................................................................3 - 76

Operating System and Application Problems .......................................................................3 - 77

Network Problems ................................................................................................................3 - 78

Print-Quality Problems .........................................................................................................3 - 79

Repeating Defects Identification Chart ................................................................................3 - 80

Light Prints in All Colors .....................................................................................................3 - 81

Light Prints in Only One Color ............................................................................................3 - 83

Blank Prints ..........................................................................................................................3 - 85

Mottled or Splotchy Prints....................................................................................................3 - 87

Unexpected Colors................................................................................................................3 - 89

Background Contamination ..................................................................................................3 - 91

Toner on Back of Print .........................................................................................................3 - 93

Repeating (Defects) Bands, Lines, Marks or Spots ..............................................................3 - 95

Repeating Defects Identification Chart ................................................................................3 - 95

Example of Scan Direction Banding ....................................................................................3 - 95

Random Bands, Lines, Marks or Spots ................................................................................3 - 96

Random “missing” spots.......................................................................................................3 - 96

Random Spotting..................................................................................................................3 - 97

Residual Imaging or Ghosting .............................................................................................3 - 98

Cold Offset - Unfused Image or Image Easily Rubs off the Paper....................................3 - 100

Color Mis-Registration ......................................................................................................3 - 101

Image is Not Centered or Positioned Correctly on the Paper ............................................3 - 103

Missing Bands, Voids or Streaks in a Single Color or All Colors

Parallel to the Leading Edge of the Paper (Scan Direction)...............................................3 - 105

Missing Bands, Voids or Streaks in a Single Color or All Colors

in the Direction of Paper Travel (Process Direction) .........................................................3 - 106

Dark Streaks in a Single Color or All colors Parallel to the Leading Edge of the Paper...3 - 108

Dark Streaks in a Single Color or All Colors in the Direction of Paper Travel.................3 - 109

Troubleshooting 3-67

Page 84

System Boot Sequence

1. When the main power switch is turned on, the health LED on the Image Processor

Board turns on immediately.

2. The boot loader checks for RAM presence and functionality. If not present or

functioning, it posts a very large “RAM ERROR” on the front panel and blinks the LED 1/2 second on/off continuously.

3. The boot loader then runs POST diagnostics.

4. POST turns off the health LED.

5. POST checks the front panel.

6. If keys have been pushed, the front panel displays “Processing Input”.

7. The front panel LED cycles: Green, Yellow, Red, and then off.

8. The front panel turns on, the LED turns Green and the POST tests are finished.

Power On Self Test (POST)

The following tests are performed when the printer is powered on, after the boot loader runs, and before the operating system is loaded and initialized.

POST diagnostics are intended to provide a quick means of isolating a defective subsystem associated with the Image Processor Board and SDRAM. POST returns control to the boot loader and the operating system is loaded. The operating system then loads the imaging processing software. If POST detected any soft errors, a message is printed in a red box on the start page. If POST detects any hard errors, both the front panel and health LED blink the error code pattern, see “LED Blink Patterns” on page 3-69.

POST Startup indications

■ At power-on the hardware default is to turn on the IP board ‘health’ LED.

■ The front panel display is reset (addressable area becomes “gray”).

■ The front panel LED cycles: Green, Yellow, Red, and then off.

■ The backlight is turned on (high intensity), with nominal contrast display.

■ The front panel display area is turned on, dark black for 1 second.

■ The front panel display is cleared.

■ The backlight is turned on with nominal intensity.

■ The POST Vn.nn message appears, and tests are quickly executed.

■ After the POST tests have finished running, the Xerox ‘splash screen’ is

posted to the front panel and PostScript begins initialization.

3-68 Phaser 7300 Color Printer Service Manual

Page 85

POST Faults

There are two kinds of faults: soft and hard.

A soft fault is any fault that is discovered by POST, but does not prevent the operating system from initializing and becoming available as a tool for troubleshooting. These POST faults do not stop execution and are reported on the StartPage in a red box after the system is running.

A hard fault is any fault discovered by POST that prevents the operating system from initializing successfully. A hard fault prevents the system from further execution and is halted with blinking LEDs (front panel and health LED). The failed test name of and “Call Customer Service” is displayed on the front panel.

Fault Reporting Devices

There is one soft fault presentation method:

■ All soft faults are printed on the StartPage.

and three hard fault presentation methods:

■ The Image Processor Board health LED flashes according to the fault code.

■ The front panel LED flashes in unison with the Image Processor Board health

LED.

■ The most recent fault is posted to the front panel.

LED Blink Patterns

For faults identified as hard faults, the POST firmware causes the Image Processor Board health LED to blink in a repetitive pattern to identify the fault. There are short and long blinks. A long blink is worth 5 and a short blink is worth 1. If a fault blink pattern is flashed as long, long, short, short, this is fault code 5+5+1+1=12, which indicates a failure in the CPU interrupt test, see “POST Diagnostics Test Descriptions Table” on page 3-70.

Note: The exception to the above pattern is a RAM test error.

The RAM tests have a special blink pattern and the front panel displays “RAM Error”.

Troubleshooting 3-69

Page 86

POST Diagnostics Test Descriptions

POST Diagnostics Test Descriptions Table

Test Fault

Code

SDRAM

I/O ASIC

Local Bus/ Front Panel

“i” Button (Configuration Chip)

Extended Memory

EEPROM

Ethernet

CPU Interrupts

USB

Real Time Clock

RAM DIMM Presence

RAM Limits

L2 Cache

PCI Bridge

IDE Disk

Parallel Port

Engine Command

Video DMA

Description

(Hard Special) This test fails if the boot loader finds no RAM present or faulty RAM.

Boot loader posts the message “RAM error” to the front panel and blinks the front panel LED.

(Hard) This test determines if the I/O chip is functioning properly.

(Hard) Performed during the POST firmware initialization phase.

If the front panel is not functioning, a hard fault is indicated by the heath LED.

(Hard) This test checks to see if the “i” button (configuration chip) is present. If no chip is present the test will fail and the front panel message “Please Install “i” Button” will display.

(Soft) (POST_TEST_DIMM1,2)

(Hard) This test checks addressing of the EEPROM.

(Hard) This test checks the ethernet core.

(Hard) This test checks that each interrupt source to the CPU is functioning.

(Hard) This test checks that the USB core is functioning properly.

(Soft) The real time clock is tested.

(Soft) This test checks for bad or incompatible RAM DIMMs.

(Soft) Checks that there is at least 128 Mbytes installed and ignores more than 512 Mbytes.

(Hard)

(Soft) Checks the disk controller core, and runs a DIAGNOSE command on the hard drive.

(Soft)

(Hard)

3-70 Phaser 7300 Color Printer Service Manual

Page 87

Printer Malefactions or Inoperable Printer Problems

No Front Panel Display After Power Switch is Turned ON.

1. Verify the AC power source, see “Measuring Power Supply Voltages” on

page 3-72.

2. Verify the +5 volt loop is complete, see “The +5 VDC Loop” on page 3-74.

3. If the front panel has no display, backlighting or LED, replace the Front Panel and

Wiring Harness.

4. Check the Image Processor Board health LED for a front panel fault, see “POST

Diagnostics Test Descriptions” on page 3-70 for more information on fault blink patterns.

5. Verify the Image Processor Board has not failed by performing Step 3 from the

troubleshooting procedure below.

6. Systematically remove all printer options to isolate a possible problem component.

The Printer Continuously Displays “Booting”, “Initializing” “Warming Up”, or will not come to a “Ready” state.

The most likely cause is that the Image Processor Board has not successfully loaded its NVRAM contents (instructions) into RAM. All print engine operation halts, and will only become ready when the Image Processor Board successfully boots.

1. Check for unreported jams within the printer and clear the jam area.

2. Power cycle the printer.

3. Verifying Image Processor Board failure: a. Power-off the printer, and remove the Image Processor Board.

b. Power-on the printer. Wait at least 5 minutes while the print engine

initializes. If there was a problem with the Image Processor Board, it will now not affect the Engine Controller Board.

c. If a traveling “

board is functional and the problem is most likely with the Image Processor Board.

d. Turn off the printer and reseat the image processor board and turn on

the printer to determine if seating was the problem.

e. Perform a PostScript NVRAM reset, see "Service Diagnostics

PostScript NVRAM Resets" on page 4-124

f. Turn off the printer and systematically remove, in the order listed

below, an individual components from the Image Processor Board to isolate a possible problem component.

■ RAM DIMM (one at a time, as at least one RAM DIMM must be

present)

■ Hard Drive

” appears across the Front Panel display, the engine

g. Download the current PostScript code to the Image Processor Board. h. Replace the Image Processor Board.

Troubleshooting 3-71

Page 88

Verifying Power Supply Operation

Verifying the power supply involves four steps:

■ Measuring the input and output voltages.

■ Checking the safety interlocks.

■ Ensuring the +5 VDC loop is complete.

■ Testing for a shorted motor or defective wiring which would shut down the

power supply or damage the Engine Controller Board.

Measuring Power Supply Voltages

1. AC Input: With the DMM set to measure AC voltages, measure for power being

supplied to the printer. It should measure between 110 to 127 VAC (110 VAC nominal) or 220 to 240 VAC (220 VAC nominal).

2. DC Output: With the DMM set to measure DC voltages, measure the voltages at

the POWER connector on the bottom of the Engine Controller Board for +5 VDC, +12 VDC and +34 VDC, see the POWER Connector Pinout below.

26 2

25 1

To p

S7300-014

POWER Connector Pinout

Pin Voltage/Signal Level Pin Voltage/Signal Level

1 Ground (0V) 14 +34 V

2 Ground (0V) 15 +12 V

3 Ground (0V) 16 Upper Thermistor

4 Ground (0V) 17 Side Thermistor

5 +5 V 18 Lower Thermistor

6 +5 V 19 Fuser Fuse

7 +5 V 20 Duplex Gate Solenoid

8 +5 V 21 Front Fan Signal

9 COM (0V) 22 Face Up Solenoid

10 COM (0V) 23 Power Signal

11 COM (0V) 24 Power Signal

12 +34 V 25 Power Signal

13 +34 V 26 Power Signal

3-72 Phaser 7300 Color Printer Service Manual

Page 89

Safety interlocks

The printer features two safety interlock switches:

S7300-016

Door safety interlock switches 1: Top Cover Interlock Switch 2: Right Cover (Door A) Interlock Switch

When the Top Cover or Right Door A are open, the +34 VDC supply and the high-voltage power supply are shut down. Generally a “Close Right Door A” or “Close Top Cover”error message will display on the front panel.

Troubleshooting 3-73

Page 90

The +5 VDC Loop

Refer to the wiring diagram, "The +5 Volt Loop" on page 10-258 for all procedures listed under this topic.

Upon power-up the low-voltage power supply (LVPS) generates a +5 volt signal which is routed out of the LVPS through the engine control board to the toner sensor board and then back out the toner sensor board to the low-voltage power supply. Once the +5 volt signal is returned to the LVPS, the LVPS will then turn on all other supply voltages.

If the low-voltage power supply does not detect the return of +5 volts, the LVPS will immediately shut-down. You may see the Engine Controller Board LED flash immediately after power-on.

To verify the +5 volt loop is complete:

1. Test fuse F6 on the Engine Controller Board for continuity. If the fuse is blown

(open circuit), check the circuit for a short to ground.

Note: Disconnect the POWER harness from the Engine

Controller Board prior to checking for a short.

a. If a short to ground is found, systematically disconnect wiring

harnesses on the Engine Controller Board to isolate the short. Replace the defective wiring harness or component and the Engine Controller Board.

2. Verify all wiring harnesses are connected, seated correctly and not damaged.

Replace any damaged wiring harnesses.

3. Check for continuity between the Engine Controller Board OPTN and the

interconnect wiring harness between the toner sensor board and LVPS. If continuity is not found, the problem is the OPTN wiring, the toner sensor board or the interconnect wiring harness.

4. Verify proper operation of the LVPS by bypassing the Engine Controller Board

and the toner sensor board.

a. Disconnect the power connector from the Engine Controller Board

and disconnect the interconnect between the LVPS and the toner sensor board.

b. Run a jumper wire between pin 5 on the POWER harness and pin 14

on the wiring harness interconnect, as shown on the +5 Volt Loop wiring diagram.

c. Turn the printer on. If the jumper connection is correct, the

low-voltage power supply will start and the power supply fans will run. This indicates the problem lies with the Engine Controller Board or the toner sensor board or their wiring. If the low-voltage power supply does not turn on, it is probably bad.

5. Replace the Low Voltage Power Supply if all other components are operating

correctly.

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Page 91

Fuser Roller Resistances

Remove the Fuser from the printer and turn the Fuser upside down to locate the connectors on the bottom.

Fuser Measure between... Resistance (ohms)

Fuser unit

New fuser: The fuse between pins C and D of the lower roller should be blown within seconds of the printer being powered on.

Used fuser: The fuse between pins C and D of the lower roller will be open. The fuse indicates a new fuser and is blown within seconds of being installed to indicate a fuser now in use.

Upper: Pins C - D and E - F are thermistor resistances.

Lower: Pins E - F are thermistor resistances.

Note: Resistance depends highly on temperature.

Upper Roller Between Pins A and B Between Pins C and D Between Pins E and F Lower Roller Between Pins A and B Between Pins C and D Between Pins E and F

Upper

B A

Between 200k - 250k ohms when hot.

0 ohms or open (fuse) Between 200k - 250k ohms when hot.

Lower

C D E F

S7300-017

Troubleshooting 3-75

Page 92

Multi-Sheet Pick

1. Ensure the correct weight and type of media is loaded in the tray. See "Media and

Tray Specifications" on page 1-16 for approved media types and weights.

2. Verify that the media settings at the front panel and the driver settings match the

media loaded in the tray.

3. Fan the media and reload into the tray.

4. Use service diagnostics to verify the printer is printing within its environmental

specifications.

5. Ensure the media is correctly loaded in the tray and that the guides fit snug against

the media.

Note: Guides can move away from the media loaded in the tray if

the tray is shut too firmly or closed too rapidly.

6. Clean the pick and feed rollers with a clean, dry, lint-free wipe if debris is visible.

Check the rollers for excessive wear or damaged.

Media Skewing

1. Ensure the correct weight and type of media is loaded in the tray. See "Media and

Tray Specifications" on page 1-16 for approved media types and weights.

2. Make sure that the media is properly installed in the tray and that the guides fit

snug against the media. For larger size media, use the additional guides located on the left side of the tray.

Note: Guides can move away from the media loaded in the tray if

the tray is shut too firmly or closed too rapidly.

3. Load a fresh ream of paper, or ensure that the media loaded is not torn, wrinkled,

bent or otherwise damaged.

4. Check for and remove any debris or obstructions in the paper path.

5. Verify that the registration rollers are in contact with one another along the entire

length of the roller and that no gaps exist between them.

6. If the problem occurs in only one tray or the MPT: a. Clean the pick and feed rollers with a clean, dry, lint-free wipe if

debris is visible. Check for excessive wear or damaged.

b. Check the tray for dirt, debris or obstructions. c. Check the tray for damage. d. Replace the tray.

3-76 Phaser 7300 Color Printer Service Manual

Page 93

Operating System and Application Problems

Print an internal test print from the printer’s front panel to ensure the problem is not printer related. Troubleshooting tips and more information are also available on the Xerox web site at: www.xerox.com/officeprinting/support

Macintosh Printing Problems

Image Never Prints

The printer acts as if it is receiving data, but nothing comes out of the printer or it goes back to “Ready” mode without printing. The most likely cause is a PostScript error occurred in the printer.

1. Power cycle to the printer and try printing again.

2. Make sure that the correct Phaser 7300 printer icon was selected in the Chooser.

Try printing the job again.

3. In the Chooser or the print dialog, switch background printing to off. Try printing

the job again.

4. If the error returns, turn ON the PostScript error handler through the front panel

PostScript Error Info under the Support menu, or CentreWare IS and print the document again. Take note of the information on the error page that was printed.

5. Select the appropriate Phaser 7300 PPD with the LaserWriter Driver or

application. Not selecting the appropriate PPD can cause PostScript errors.

6. Select a different document from the application and try to print. If the PostScript

error does not occur, then the original document may be causing the problem.

Image Prints in Black-and-white

1. Ensure the driver setting for the TekColor tab is not set to “Black & White”.

Image is Rotated 90 Degrees

1. In the application's Page Setup, make sure that the image is selected to print in

portrait or landscape orientation to match the document. Also, ensure the selected paper size is correct.

Troubleshooting 3-77

Page 94

Windows printing problems

Image Never Prints

1. Power cycle to the printer and try printing again.

2. Try printing a test page from the printer driver’s properties dialog box.

3. Try printing from another application.

4. Try printing to another printer.

5. Try printing from another computer.

6. If the error returns, turn ON the PostScript error handler through the front panel

PostScript Error Info in the Support menu, or CentreWare IS and print the document again. Take note of the information on the error page that just printed.

Image Prints in Black-and-white

1. Ensure the driver setting for the TekColor tab is not set to “Black & White”.

Image is Rotated 90 Degrees

1. In the application's Page Setup, make sure that the image is selected to print in

portrait or landscape orientation to match the document. Also, ensure the selected paper size is correct.

Network Problems

The Phaser 7300 printer maintains 4 logs in memory detailing network functions. The logs contain TCP/IP, NetWare and AppleTalk initialization events. The logs can be viewed from the front panel or accessed remotely via CentreWare IS.

The logs list events chronologically. The log is limited in length; when the log is full the printer deletes the oldest record off the list as a new error occurs.

There is a Connection Setup Page, Configuration Page and a Network Reset Menu available for troubleshooting Network problems.

To print an Event Log, Runtime Log or Configuration Page:

1. Enter normal ‘Customer Mode’.

2. From the main menu, highlight Support Menu and press OK.

3. Scroll and highlight Network Questions? and press OK.

4. Highlight the appropriate menu item from the list and select OK.

5. The page should now print.

3-78 Phaser 7300 Color Printer Service Manual

Page 95

Print-Quality Problems

Print-quality defects can be attributed to printer components, consumables, media, internal software, external software applications or environmental conditions. To successfully troubleshoot print quality problems, as many variables as possible must be eliminated before replacing printer parts.

When analyzing a print-quality defect, first determine if the defect occurs in all colors or only one color and if it is repeating or random. Defects occurring in only one color are usually attributable to the Imaging Units or Toner Cartridges.

BEFORE USING ANY TROUBLESHOOTING PROCEDURE FOR PRINT-QUALITY PROBLEMS, PERFORM THE FOLLOWING STEPS:

■ See "Media and Tray Specifications" on page 1-16 for media that has been

tested and approved for use in the Phaser 7300 printer. If the print-quality defect is still present when printing on approved media from an unopened ream of paper, software applications, environmental conditions, and printer hardware need to be researched.

■ Ensure the front panel and driver settings match the media loaded in the tray.

■ Use service diagnostics to determine if the temperature and humidity meet the

environmental specifications, see "Environmental Specifications" on page 1-15. Temperature and humidity extremes can adversely effect the Xerographic and fusing characteristics of the printer.

■ Cycle power to the printer. This will initiate the Color Registration and

Automatic Density Control (ADC) Calibrations.

■ Use the printer’s internal test prints to verify the problem is with the printer

and not with the user settings or application.

■ Color Reference Page

■ Graphics Demonstration Page

■ Office Demonstration Page

■ To isolate repeating defect problems to a specific part, print the Repeating

Defects Page.

■ Clean and remove any debris or obstructions from the printers paper path.

■ Vacuum any obvious toner spills within the printer.

Troubleshooting 3-79

Page 96

Some print-quality problems can be associated with specific assemblies. The most common problems and the associated assemblies are listed below. Refer to the specific print-quality troubleshooting procedure for more information.

■ Imaging Units - generally seen in only one color.

■ Streaks in Process Direction (in the direction of paper feed, parallel with

paper travel)

■ Banding in Scan Direction (across the page, perpendicular to paper travel)

■ Uneven Density

■ Vo i d s

■ Repeating Defects

■ Mis-registration

■ Transfer Unit

■ Toner on the back side of the printed page (simplex mode)

■ Light Prints

■ Repeating Defects

■ Mis-registration - only when there is obvious damage to the belt.

■ Fuser Unit

■ Hot or Cold Offsetting

■ Repeating Defects

■ Dark Streaks in Process Direction

■ LED Head

■ Streaks in the Process Direction

■ Uneven Density in the Scan Direction

Repeating Defects Identification Chart

FRU or CRC Distance between Defects

Imaging Unit 94 mm (3.70 in.)

50 mm (1.97 in.)

44 mm (1.73 in.)

Transfer Unit 58 mm (2.29 in.)

Fuser Assembly 143 mm (5.62 in.)

3-80 Phaser 7300 Color Printer Service Manual

Page 97

Light Prints in All Colors

The overall image density is too light in all colors. If the image is light in only one color, see “Light Prints in Only One Color” on page 3-83.

S7300-019

Troubleshooting Procedure

Step Question or Action Yes No

1 Verify all packaging material has been removed

2 Verify the correct color correction setting is

3 Perform the Light and Darkness Color Balance

4 Remove the Imaging Units and the Transfer

5 Are the LED heads dirty?

6 Are the wiring harnesses on the LED heads

7 Is +5V supplied to Pin 1 of each LED Head

form the toner cartridges.

selected in the printer driver?

Note: The TekColor correction set to Automatic provides the best results for most documents

Procedure.

Did this correct the problem?

Unit and check for toner contamination on the high voltage contacts.

Clean each head with a clean, lint-free cloth.

Did this correct the problem?

undamaged, properly routed and seated?

assembly?

KPOW2 YPOW2 MPOW2 CPOW2

Go to step [2]. Remove the

Go to step [3]. Set the color

Complete Go to step [4].

Clean the contacts.

Complete Go to step [6].

Go to step [7]. Replace or

Go to step [9]. Go to step [8].

packing material.

correction to automatic and reprint the job.

Go to step [5]

reseat the wiring harness.

Troubleshooting 3-81

Page 98

Troubleshooting Procedure (cont'd.)

Step Question or Action Yes No

8 Is +5V supplied to the POWER connector pins

1, 2, 3, 4, 5, 6, 7 and 8 on the Toner Sensor Board?

9 Is +34V supplied to the POWER connector pins

12, 13, and 14 on the Engine Controller Board?

10 Is +34V supplied to the HVOLT connector Pin 2

on the Engine Controller Board.

11 Inspect the high-voltage wiring harness. Replace

Replace the Toner Sensor Board.

Go to step [10]. Replace the

Go to step [11]. Replace the

defective wiring harness.

Replace the LVPS.

LVPS or wiring harness.

Engine Control Board.

Replace the Transfer Unit.

Replace the HVPS.

3-82 Phaser 7300 Color Printer Service Manual

Page 99

Light Prints in Only One Color

Only one color, yellow, magenta, cyan, or black is too light on the printed image.

In the example to the left, cyan is printing too light causing the blue flower to look too light and effecting the true green of the leaves.

Print the 100% Solid Fill Test Pattern.

S7300-020

Troubleshooting Procedure

Step Question or Action Yes No

1 Verify all packaging material has been removed

2 Verify the correct color correction setting is

3 Print the 100% Solid Fill test print.

4 Remove the toner cartridge and check for toner

5 Remove the Imaging Units and the Transfer

6 Is the LED Head dirty?

7 Swap the LED Head of the problem color with

form the toner cartridges.

selected in the printer driver?

Note: The TekColor correction set to Automatic provides the best results for most documents

Can the problem be isolated to only one primary color?

starvation inside the Imaging Unit.

Is there evidence of toner starvation?

Unit and check for toner contamination on the high voltage contacts.

Are the contacts contaminated?

Clean the head with a clean, lint-free cloth.

Did this correct the problem?

any other LED Head.

Print a Solid Fill Test Pattern.

Has the problem moved with the LED Head?

Go to step [2]. Remove the

Go to step [3]. Set the color

Go to step [4]. see “Light Prints

Replace the toner cartridge.

Clean the contacts.

Complete Go to step [7].

Replace the LED Head.

packing material.

correction to automatic and reprint the job.

in All Colors” on page 3-81

Go to step [5]

Go to step [6]

Go to step [8].

Troubleshooting 3-83

Page 100

Troubleshooting Procedure (cont'd.)

Step Question or Action Yes No

8 Are the wiring harnesses on the LED heads

undamaged, properly routed and seated?

9 Is +5V supplied to Pin 1 of the problem LED

Head assembly?

KPOW2 YPOW2 MPOW2 CPOW2

10 Is +5V supplied to the POWER connector pins

1, 2, 3, 4, 5, 6, 7 and 8 on the Toner Sensor Board.

Go to step [9]. Replace or

Replace the Imaging Unit.

Replace the Toner Sensor Board.

reseat the wiring harness.

Go to step [10].

Replace in the following order:

Transfer Unit

LVPS

3-84 Phaser 7300 Color Printer Service Manual

Xerox Phaser 7300B, Phaser 7300DX, Phaser 7300N, Phaser 7300 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Terms

Manual Terms

Product Terms:

Power Safety Precautions

Power Source

Disconnecting Power

Electrostatic Discharge (ESD) Precautions

Service Safety Summary

General Guidelines

Warning Labels

Safety Interlocks

Servicing Electrical Components

Servicing Mechanical components

Servicing Fuser Components

Declaration of Conformity

In the European Union

Canadian Notice

Avis Canadien

European Notice

Hinweis

Table of Contents

General Information

Contents

The Phaser 7300 Color Printer Overview

Phaser 7300 Printer Configurations

Secure Prints, Proof Prints, Saved Prints and PDF Direct Printing

Power Saver Mode

Printer Memory and RAM Capabilities

Parts of the Printer

Print Engine Base Configuration

Printer Options - Lower Tray Deck (LTD) and Lower Tray Assembly (LTA)

Printer Options (cont’d) - Duplex Unit

1. Duplex Unit

Front Panel Configuration

Front Panel LED indicators:

Image Processor (IP) Board Components

Rear Panel Configuration of the IP Board

DIP Switches

Printer Specifications

Physical Dimensions - Print Engine

Physical Dimensions - Options

Printer Clearances

Functional Specifications

Print Speeds

Electrical Specifications

Error Messages and Codes

Accessing Error Codes and Fault History

2. View the printer’s fault history on the front panel. a. Go to Support Menu --> Service Tools --> Fault History.

Error Messages and Codes Index

Service Flowchart

8 If a toner cartridge appears obviously damaged, replace with a new one.

1 Use the Parts List to locate a part number 2 Use the Removal and Replacement Procedures to replace the part.

Using the Troubleshooting Procedures

General Notes on Troubleshooting

Service Diagnostics

Enter without rebooting the printer (Hidden Service Menu):

2. Hold down the Up Arrow key and press the Down Arrow key.

3. Scroll to Run Diagnostics and press OK.

Enter by rebooting the printer:

1. Turn the printer power OFF.

4. The front panel displays the Service Diagnostics Menu.

Service Diagnostics Key Press and Function Table

Error Messages and Codes Procedures

Jam at Top Cover

Jam at Door [A] [B] [C] [D] [E]

Jam at Duplex Unit

Misfeed at Tray [1] [2] [3] [4] [5]

Insert Tray [1] [2] [3] [4] [5]

E12: Top Output Tray is Full, Unload Paper

MPT Empty, Load Paper

Tray [1] [2] [3] [4] [5] Empty, Load Paper

Load MPT with [size*] [type*]

Load Tray [1] [2] [3] [4] [5] with [size*] [type*]

Adjust Tray [1] [2] [3] [4] [5] Size

Close Top Cover

Close Duplex Unit

Load MPT with [size] [type]

Load Tray [1] [2] [3] [4] [5] with [size] [type]