Tektronix Z740/N - Phaser 740 Color Laser Printer Manuale utente

Warning

The following servicing instructions are for

use by qualified service personnel only. To

avoid personal injury, do not perform any

servicing other than that contained in

operating instructions unless you are qualified

to do so.

This printing: May 1999

063-3102-00

PHASER® 740 and 740L

LASER PRINTERS

1998 by Tektronix, Inc., Wilsonville, Oregon. Printed in the United States

in any form without permission of Tektronix, Inc.

Tektronix

, Phaser

, and Made for Each Other

are registered trademarks of

Tektronix, Inc. TekColor™, PhaserShare™, PhaserMatch™, PhaserLink™,

Finepoint™ and PhaserPrint™ are trademarks of Tektronix, Inc. RealSUPPORT

and TekColor Care

are service marks of Tektronix, Inc.

Other marks are trademarks or registered trademarks of the companies with which

they are associated.

September 1998. First printing

November 1998. Changed pages: 88, 94, 96, 106, 108

May 1999. Changed pages: 5, 94

TE/mq/mm

Users safety summary

Terms in

CAUTION Conditions that can result in damage to the product.

manual:

WARNING Conditions that can result in personal injury

or loss of life.

Power source:

For 110 VAC printers, Do not apply more than 130 volts RMS between

the supply conductors or between either supply conductor and ground. Use only the

speciﬁed power cord and connector. For 220 VAC printers, Do not apply more than

250 volts RMS between the supply conductors or between either supply conductor

and ground. Use only the speciﬁed power cord and connector.Refer to a qualiﬁed

service technician for changes to the cord or connector.

Operation of product:

Avoid electric shock by contacting a qualiﬁed service technician

to replace fuses inside the product. Do not operate without the covers and panels

properly installed. Do not operate in an atmosphere of explosive gases.

WARNING Turning the power off using the On/Off switch does

not de-energize the printer. You must remove the power cord to

disconnect the printer from the mains. Keep the power cord

accessible for removal in case of an emergency.

Safety instructions:

Read all installation instructions carefully before you plug the

product into a power source.

Terms on

CAUTION A personal injury hazard exists that may not be

product:

apparent. For example, a panel may cover the hazardous area.

Also applies to a hazard to property including the product itself.

DANGER A personal injury hazard exists in the area where

you see the sign.

Care of product:

Disconnect the power plug by pulling the plug, not the cord.

Disconnect the power plug if the power cord or plug is frayed or otherwise damaged,

if you spill anything into the case, if product is exposed to any excess moisture, if

product is dropped or damaged, if you suspect that the product needs servicing or

repair, and whenever you clean the product.

Ground the product:

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

grounded AC outlets only. If necessary, contact a licensed electrician to install a

properly grounded outlet.

Symbols as marked on product:

DANGER high voltage:

Protective ground (earth) terminal:

Use caution. Refer to the manual(s) for information:

Laser use caution. Refer to the manual(s) for information:

WARNING:

If the product loses the ground connection, usage of knobs and controls

(and other conductive parts) can cause an electrical shock. Electrical product may be

hazardous if misused.

Service safety summary

For qualiﬁed service personnel only:

Refer also to the preceding Users Safety Summary.

Do not service alone:

Do not perform internal service or adjustment of this product

unless another person capable of rendering ﬁrst aid or resuscitation is present.

Use care when servicing with power on:

Dangerous voltages may exist at several points

in this product. To avoid personal injury, do not touch exposed connections and

components while power is on.

Disconnect power before removing the power supply shield, soldering, or replacing

components.

Do not wear jewelry:

Remove jewelry prior to servicing. Rings, necklaces, and other

metallic objects could come into contact with dangerous voltages and currents.

Power source:

This product is intended to operate from a power source that will not

apply more than 250 volts rms between the supply conductors or between either

supply conductor and ground. A protective ground connection by way of the

grounding conductor in the power cord is essential for safe operation.

This product is certiﬁed under IEC 825 as a Class 1 Laser Product.

9008-78

DANGER:

Invisible laser radiation

when open and interlock

defeated.

AVOID DIRECT

EXPOSURE TO BEAM.

CAUTION:

Invisible laser radiation

when open and

interlocks defeated.

AVOID DIRECT

EXPOSURE TO BEAM.

VORSICHT:

Unsichtbare Laserstrahlung,

wenn Abdeckung geöffnet

und Sicherheitsverriegelung

überbrückt.

NICH DEM STRAHL

AUSSETZEN.

ATTENTION:

Rayonnement laser invisible

dangereux en cas

d'ouverture et lorsque

la sécurité est neutralisée.

EXPOSITION DANGEREUSE

AU FAISCEAU. Class 3B

PELIGRO:

Cuando se abre y se

invalida el bloqueo, se

producen radiaciones

invisibles de láser.

EVITESE LA

EXPOSICION

DIRECTA A TALES

RAYOS.

VARNING:

Osynlig laser-

strálning när denna

del är öppnad och

spärrar är

urkopplade.

STRÅLEN

ÄR FARLIG.

VARNING:

Osynlig laserstrálning

när denna del är

öppnad och spärrar är

urkopplade.

BETRAKTA EJ

STRÅLEN.

VAROI:

Näkymätön

avattaessa ja

suojalukitus

ohitettaessa olet

alttiina lasersäteilylle.

ÄLÄ KATSO

SÄTEESEN.

ADVARSEL:

Usynlig laserstràling

ved abning når

sikkerhedsafbrydere

er ude af funktion.

UNDGÅ UD

ÆTTELSE FOR

STRÅLING.

ADVARSEL:

Usynlig laserstraling

nar deksel åpnes og

sikkerhedslas brytes.

UNNGÅ

EKSPONERING

FOR STRÅLEN.

PJQT4521ZA

Service Guide

Contents

General Information 1

The Phaser 740 Color Printer 2

RAM and printer capabilities 4

Print engine assemblies 6

The image processor board 9

Front panel 10

Rear panel 12

Network card LEDs 12

Test print button 13

Health LED 14

Media tray type sensing 14

Specifications 16

Regulatory specifications 19

Error Codes and Messages 21

Error messages 21

Print engine error codes 21

Normal power-up self-tests 29

Troubleshooting 31

System power-up sequence 31

Print engine troubleshooting 32

Testing the print engine 32

Verifying printer operation by using its self-test print 33

Verifying power supply operation 33

Measuring power supply voltages 33

Inspecting the power supply fuses 35

Safety interlocks 35

Testing for a shorted motor 37

Media jams and the paper path 37

Media-based problems 37

Media problems 37

Multiple-sheet pick 38

The media skews passing through the paper path 38

Paper tray indicates empty when it is not 38

No paper feeder installed 39

No imaging unit installed 39

Phaser 740 Color Printer

Jams 39

Paper mis-picks at the paper tray 39

Paper jams midway in the paper feeder 40

Paper jams at the second bias transfer roller 40

Fuser jams 41

Eject jams 42

Multi-purpose tray feed jams 42

Jams in the auto-duplex unit 43

Other problems 43

The printer continuously displays “Initializing” 43

No toner cartridge installed message when it is 43

No fuser installed message when it is 44

No fuser roll installed message when it is 44

Front door open when it is closed 44

Left-side door open message when it is not 45

High temperature error 45

Low temperature error 45

High voltage error 46

Thermistor open error 46

Front panel cycling between READY and WARMING UP 46

Erratic printer behavior 46

Installed RAM not recognized 46

Printing and print quality problems 47

Blank print 47

All-black print 47

Missing primary color 48

Light print 48

Repeated spots or lines on print in-line with each other 49

Dark vertical line in print 49

White horizontal line or band in all the colors of a print 49

Vertical lines in the print 50

Dirty background 50

Mis-transfer, missing portions of toner 50

Dark, irregular steaks in all colors 50

Ghosting 51

Unfused or partially fused printing 51

Image is skewed on the paper 51

Stains on the back of the print 51

No printing on edge of print 52

Image is not centered on the print when it should be 52

The print is wrinkled 52

Macintosh printing problems 53

Image never prints 53

Image prints in black-and-white 53

Image is rotated 90 degrees 54

Printer isn’t in the Chooser 54

Windows printing problems 54

Image never prints 54

Service Tests and Adjustments 55

Service Guide

Required tools 55

Printing test prints 56

Print service test prints 56

Printing the Configuration Page 56

Printing the demonstration pages 56

Printing the print engine’s test print 56

Printer self-diagnostics 57

Service tests 57

Print engine calibration 60

Printer color correction 60

Manually setting color corrections 60

Cleaning and Maintenance 63

Service preventive maintenance procedure 63

Recommended tools 64

Cleaning 64

Lubrication 65

Resetting NVRAM 67

Key FRU Disassembly 69

Printer cabinet 69

EMI shields 71

Cartridge selector/eject unit (right door) 72

Paper feeder and tray sensor board 74

Multi-purpose tray pick roller 75

Cork separator pad 76

Laser scanner 77

Power supply 78

Main motor 79

Paper feed motor 79

Toner cartridge drive motor 79

Toner cartridge drive unit 80

Accumulator belt home position sensor 80

Left door open interlock switch 80

Temperature/humidity sensor board 81

Pre-exposure lamp 81

Pre-transfer lamp 81

Gear train 82

Tray guides 83

Engine control board 84

High-voltage board 85

Image processor board 86

FRU List 87

Supplies and accessories 98

Phaser 740 Color Printer

Test Prints 103

Wiring Diagram 113

Service Guide

Figures

The Phaser 740 Color Printer 1

Print engine major components 6

Print engine components (continued) 7

Print engine sensor, switch and solenoid locations 8

Features of the image processor board 9

The front panel 11

The Phaser 740 rear panel 13

Tray switch sensors and actuators 15

Measuring the DC voltages (test points) 34

Door safety interlock switches 36

Manual color correction reference print 61

Removing cabinet covers 69

Removing cabinet covers 70

Removing the EMI shields 71

Removing the cartridge selector/eject unit 73

Removing the paper feeder 74

Removing the multi-purpose tray pick roller 75

Removing the cork separator pad 76

Removing the laser scanner and driver board 77

Removing the power supply 78

Removing the main motor, paper-feed motor, toner cartridge drive motor and cleaning

board 79

Removing the toner cartridge drive unit, home position sensor and the left door interlock

switch 80

Removing the temperature/humidity sensor board 81

Removing the pre-exposure lamp and pre-transfer lamp 81

Removing the gear train 82

Removing the tray guides 83

Removing the engine control board 84

Removing the high-voltage board 85

Removing the image processor board 86

Cabinet FRUs 88

Cabinet FRUs 89

Motor and fan FRUs 91

Sensor, switch and flag FRUs 93

Circuit board and electronic FRUs 95

Imaging and paper feed component FRUs 97

Wiring diagram 113

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