Tektronix Phaser 740 User 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: Febuary 2000

063-3102-01

PHASER® 740 and 750

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.

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. Aprotective 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

vii

Contents

General Information 1

The Phaser 740 Color Printer 2

The Phaser 750 Color Printer 4

Phaser 740 printer RAM and printer capabilities 6

Phaser 750 printer RAM and printer capabilities 8

Print engine assemblies 10

The image processor board 13

Phaser 740 13

Phaser 750 14

Front panel 15

Rear panel 17

Test print button 17

Network card LEDs 18

Health LED (Phaser 740 only) 20

Media tray type sensing 20

Difference between Phaser 740 and 750 22

Specifications 23

Regulatory specifications 26

Error Codes and Messages 27

Error messages 27

Print engine error codes 27

Normal power-up self-tests 35

Troubleshooting 37

System power-up sequence 37

Print engine troubleshooting 38

Testing the print engine 38

Verifying printer operation by using its self-test print 39

Verifying power supply operation 39

Measuring power supply voltages 39

Inspecting the power supply fuses 41

Safety interlocks 41

Testing for a shorted motor 42

Media jams and the paper path 43

Media-based problems 43

Media problems 43

Multiple-sheet pick 44

The media skews passing through the paper path 44

Paper tray indicates empty when it is not 44

No paper feeder installed 45

No imaging unit installed 45

viii

Phaser 740 and 750 Color Printers

Jams 46

Wrong media 46

Paper mis-picks at the paper tray 46

Paper jams midway in the paper feeder 46

Paper jams at the second bias transfer roller 47

Fuser jams 48

Eject jams 48

Multi-purpose tray feed jams 49

Jams in the duplex unit 49

Other problems 50

The printer continuously displays “Initializing” 50

No toner cartridge installed message when it is 50

No fuser installed message when it is 50

No fuser roll installed message when it is 51

Front door open when it is closed 51

Left-side door open message when it is not 51

High temperature error 52

Low temperature error 52

High voltage error 52

Thermistor open error 52

Front panel cycling between READY and WARMING UP 53

Erratic printer behavior 53

Installed RAM not recognized 53

Printing and print quality problems 54

Blank print 56

All-black print 56

Single color mottled or with non-uniform density streaks 57

Dark vertical line in print, single color 57

Vertical line in print, all colors 57

Vertical line or scratch in print, single color 58

Vertical line or scratch in print, all colors 58

Small, repeating light dot in one color in-line with each other 59

Single light, horizontal line in all the prints 60

Large, random light smudges 60

One or more dark vertical line in all colors 61

Dark, irregular, vertical streaks and smears on the entire page 62

One primary color faded or pale OR a single color has a dark vertical streak

Light, faded, pale prints 63

Single white spot appear in the same place on the print 64

Contamination of one color by another 64

Missing primary color 65

Mis-transfer, missing portions of toner 65

Dirty background 66

Stains on the back of the print 66

Ghosting 66

Unfused or partially fused printing 66

Image is skewed on the paper 67

No printing on edge of print 67

Image is not centered on the print when it should be 67

Service Guide

The print is wrinkled 68

Macintosh printing problems 69

Image never prints 69

Image is rotated 90 degrees 69

Image prints in black-and-white 69

Printer isn’t in the Chooser 70

Windows printing problems 70

Image never prints 70

Interpreting the Supplies Page 71

Life remaining gauges 71

Date installed 71

Toner coverage 71

Print counts 71

Print count conversions 72

Service Tests and Adjustments 73

Required tools 73

Printing test prints on the Phaser 740 printer 74

Print service test prints 74

Printing the Configuration Page 74

Printing the demonstration pages 74

Printing the print engine’s test print 74

Printing test prints on the Phaser 750 printer 75

Printing the Diagnostic Test Pages and Solid Fill Test Page 75

Printing the Configuration Page 75

Printing the demonstration pages 75

Printing the print engine’s test print 75

Embedded pages (Phaser 750 printer only) 76

Printer self-diagnostics 77

Phaser 740 service tests 77

Phaser 750 service tests 80

Print engine calibration 84

Printer color correction 84

Manually setting color corrections 84

Phaser 740 84

Phaser 750 84

Calibrate for paper (Phaser 750 only) 86

Cleaning and Maintenance 87

Service preventive maintenance procedure 87

Recommended tools 88

Cleaning 88

Lubrication 89

Phaser 740 and 750 Color Printers

Resetting NVRAM 91

Phaser 740 printer 91

Phaser 750 printer 91

Key FRU Disassembly 93

Printer cabinet 93

EMI shields 95

Cartridge selector/eject unit (right door) 96

Paper feeder and tray sensor board 98

Multi-purpose tray pick roller 99

Cork separator pad 100

Laser scanner 101

Power supply 102

Main motor 103

Paper feed motor 103

Toner cartridge drive motor 103

Cleaning board 103

Toner cartridge drive unit 104

Accumulator belt home position sensor 104

Left door open interlock switch 104

Temperature/humidity sensor board 105

Pre-exposure lamp 105

Pre-transfer lamp 105

Paper feed/fuser gear train 106

Tray guides 107

Engine control board 108

High-voltage board 109

Image processor board 110

Phaser 740 110

Phaser 750 111

FRU List 113

Supplies and accessories 125

Test Prints 131

Phaser 740 printer test prints 131

Phaser 750 printer test prints 132

Wiring Diagram 135

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