HP t610, t620, t1100, t1120 Service Manual

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Page 1

HP Designjet

T1100/T1100ps/T610/

T1120/T1120ps/T620

printer series

Version 9.1

August 22, 2009

Page 2

For HP internal use only

This document contains proprietary information that is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard Company.

Warranty

The information contained in this document is subject to change without notice.

Hewlett-Packard makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.

Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

Warning

The procedures described in this manual are to be performed by HP-qualified service personnel only.

Electrical shock hazard

Serious shock hazard leading to death or injury may result if you do not take the following precautions:

• Ensure that the AC power outlet (mains) has a protective earth (ground) terminal.

• Disconnect the Printer from the power source prior to performing any maintenance.

• Prevent water or any other liquids from running onto electrical components or circuits, or through openings in the enclosure.

Electrostatic discharge

Refer to the beginning of Chapter 4 of this manual, for precautions you should take to prevent damage to the Printer circuits from electrostatic discharge.

WARNI NG

The Warning symbol calls attention to a procedure, practice, or the like, which, if not correctly performed or adhered to, could result in personal injury. Do not proceed beyond a Warning symbol until the indicated conditions are fully understood and met.

CAUTION

The Caution symbol calls attention to an operating procedure, practice, or the like, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the product. Do not proceed beyond a Caution symbol until the indicated conditions are fully understood and met.

Content Management Department, Barcelona Division, Hewlett-Packard Espanola, S.A. Avda. Graells, 501 08190 Sant Cugat del Vallès Spain

Safety symbols

General definitions of safety symbols are given immediately after the table of contents.

Page 3

Table of Contents 1

1 Troubleshooting 2 System Error Codes 3 Service Tests and Utilities 4 Service Calibrations 5 Parts and Diagrams 6 Removal and Installation 7 Preventive Maintenance

For information about Using this Manual, please refer to the next page.

Page 4

Table of Contents

Using this manual

Purpose

This Service Manual contains information necessary to test, calibrate and service:

 HP Designjet T1100 Printer 24 inch (Model Q6683A)  HP Designjet T1100 Printer 44 inch (Model Q6687A)  HP Designjet T1100ps Printer 24 inch (Model Q6684A)  HP Designjet T1100ps Printer 44 inch (Model Q6688A)  HP Designjet T610 Printer 24 inch (Model Q6711A)  HP Designjet T610 Printer 44 inch (Model Q6712A)  HP Designjet T620 Printer 24 inch (Model CK835A)  HP Designjet T1120 Printer 24 inch (Model CK837A)  HP Designjet T1120 Printer 44 inch (Model CK839A)  HP Designjet T1120ps Printer 24 inch (Model CK838A)  HP Designjet T1120ps Printer 44 inch (Model CK840A)

For information about using these printers, refer to the corresponding User’s

ide.

Readership

The procedures described in this Service Manual are to be performed by HP Certified service personnel only.

Part numbers

Part numbers for printer options, accessories and service parts are located in

Chapter 5 Parts and Diagrams on page 5-1.

Conventions

Any text that uses the blue underlined format (except this one) is a link that directs you to the page number of the reference. If you are viewing the document as a PDF file, you can click on that link to be taken there directly.

2 HP Designjet T Series — Service Manual

Page 5

Troubleshooting 1

Using the Front Panel 1-3 General Troubleshooting 1-4

Introduction 1-4 Troubleshooting System Error Codes 1-4 Performing a Service Test on a failed Assembly 1-4 Performing the Necessary Service Calibrations 1-4 The Front Panel is blank 1-5 Solving Print Quality Problems 1-5 The Printer does not Power ON 1-5 The Printer Continuously Rejects Printheads 1-5 Cover Sensors are not Working 1-5 The Line Sensor has Problems Detecting Media 1-5 Banding at variable extreme environmental conditions 1-6 Worm marks on HP Coated media with light area fills 1-6 Solving Media-Handling Problems 1-7

Print quality troubleshooting 1-9

Print Quality Troubleshooting Actions 1-9 The Service Image Quality Diagnostic Print 1-9 Reading the Diagnostic Print Results 1-11

Diagnostic Part 1: Printhead Reliability 1-11 Diagnostic Part 2: Printhead Alignment 1-12

Diagnostic Part 3: Printheads & Paper Advance 1-13 The Advanced Diagnostic Prints 1-15 Reading the Advanced Diagnostic Print Results 1-16 Troubleshooting Print Quality Problems 1-24

Print Quality General Advice 1-24

Horizontal Lines Across the Image (Banding) 1-24

Lines are Missing, Too Thin, or Too Thick 1-25

Problems with Stepped Lines 1-26

Lines are Printed Double or in Wrong Colors 1-27

Lines are discontinuous 1-27

Lines are Blurred (Ink Bleeds from Lines) 1-28

Problems with Graininess 1-28

Paper is not Flat 1-29

Ink marks on the paper 1-30

Horizontal smears on the front of coated paper 1-30

Ink marks on the back of the paper 1-30

Problems with the Edges of objects 1-31

Stepped or not sharp 1-31

Darker than expected 1-31

Black and white prints do not look neutral 1-31

Horizontal lines at the end of a cut sheet print 1-31

Vertical lines of different colors 1-31

White spots on the print 1-32

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Problems with Color Accuracy 1-32

Output Only Contains a Partial Print 1-33

Problems with Image Clipping 1-33

Some objects are missing from the printed image 1-34

A PDF file is clipped or objects are missing 1-34 Print Quality Troubleshooting Wizard 1-34

Ink Supplies Troubleshooting 1-38

Introduction to ink supplies 1-38

What are Ink Supplies? 1-38

Ink Cartridges 1-38

Available Ink Cartridges 1-39

Printheads 1-39

Available Printheads 1-40

General Information About the Ink Supplies 1-40

General Precautions When Handl

When Should You Replace the Ink Supplies? 1-41 Ink Cartridge Levels, Information, and Replacement 1-41

Ink Cartridge Levels 1-41

“View Ink Levels” Direct Access Key 1-41

“View Ink Levels” from the ink menu 1-41

Obtaining Ink Cartridge Information 1-41

The printer consumes more gray ink ink than M, C, or Y 1-43

Changing an Ink Cartridge 1-43 Printhead Information, Replacement and Alignment 1-45

Obtaining Printhead Information 1-45

Changing a Printhead 1-46

Aligning Printheads 1-48

Reinsert Printheads Procedure 1-48

Image Quality Maintenance Procedure 1-48

Scanning errors during alignment 1-49 Ink Cartridge and Printhead Status Messages 1-49

Ink Cartridge Status Messages 1-49

Printhead status messages 1-50

Printhead Error Codes 1-50 Solving Ink Supplies Problems 1-52

You Cannot Insert the Ink Cartridge Into the Printer 1-52

You Cannot Insert the Printhead Into the Printer 1-52

The front panel says to reset or replace a printhead 1-52 Maintaining and Cleaning the Printheads 1-53

Clean the printheads 1-53

Flex Contacts Cleaning Tool 1-54

ing Ink Supplies 1-40

HP Designjet T Series — Service Manual 1-2

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Using the Front Panel

Below is a diagram of the front panel.

Using the Front Panel

View Loaded Paper

Unload Paper

Key Function

 Arrow Keys

Use the Arrow keys to scroll through a menu or toggle between YES or NO

 Cancel

Use the Cancel key to abort or stop a procedure or reject test results.

 OK

Use the OK key to select a menu option.

 Power

Use the Power key to turn the printer ON and OFF.

 Menu

Use the Menu key to enter the main menu.

 Back

Use the Back key to go back to the previous menu or reject test results.

View Ink Levels

Form Feed and Cut

when prompted.

Up and Down

Cancel

Power

Back

Service Key Combinations

 Diagnostic mode

With the printer OFF, press and hold the UP and OK keys. While holding the Up and OK k printer. Hold all three keys until the Power key stops flashing, usually about 5 seconds.

eys down, press and hold the Power key to turn on the

 Service Menu (Service Engineers Only)

From the main menu, press and hold the Up and Cancel keys.

 Service Menu (For users)

From the main menu, press and hold the Down and Cancel keys.

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Troubleshooting

General Troubleshooting

Introduction

This chapter will guide you through the relevant steps to take when troubleshooting the printer.

Troubleshooting System Error Codes

Chapter 2 Introduction on page 2-2 contains a list of system error codes and

their respective descriptions and recommended corrective actions. Only try

ecommended action at a time and check if the error code has

one r disappeared.

If you have an error code which is not documented in this Service Manual or yo

u have an error which you cannot resolve, then report the error to the HP Response Center or the nearest HP Support Office. When reporting the error, have the following information ready:

 Model and Serial Number of the printer.  Which firmware revision the printer is using (See Note below). Check

firmware in Utilities / Statistics / Code rev.

 The complete error number (See Note below).  The Service Configuration Print.

The Current configuration sheet.

  Which software application the customer is using (name, version, etc.).

When reporting the System Error Code, make sure that you supply the full Er

ror Code and the firmware version. Without this information, HP Support

Personnel cannot help you.

Performing a Service Test on a failed Assembly

If possible, always perform a Service Test on the component/assembly that you are about to replace, just to make sure that is the component/assembly that has failed.

If the test on that component/assembly passes, you should NOT replace it.

For information on the Service Tests and how to use them see

Service Tests and Utilities on page 3-1.

Performing the Necessary Service Calibrations

Is the printer calibrated correctly after replacing a component? For information on the Service Calibrations and how to use them see

Service Calibrations on page 4-1.

Remember that certain Calibrations are required even if an Assembly has been disas

sembled to gain access to another Assembly or Component.

Chapter 3

Chapter 4

1-4 HP Designjet T Series — Service Manual

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Solving Print Quality Problems

Whenever a Print Quality problem appears, it is advisable to print the Diagnostic Print to help diagnose the problem. The Diagnostic Print will help you differentiate between possible printhead errors and other problems such as incorrect front-panel selection, driver or RIP configuration or mechanical problems.

The Front Panel is blank

1 See What to do if the Front Panel is blank on page 2-5.

The Printer does not Power ON

1 Check that the power cord is connected correctly to the Printer and to the

Power Socket.

heck that the Power Switch on the BACK of the Printer is in the ON

2 C

position.

heck to see the LED on the Front Panel Power Switch are On.

3 C

heck that the Front-Panel Cable is correctly connected to the Electronics

4 C

Module. Also make sure that the Front-Panel cable is not damaged.

General Troubleshooting

eplace the Power Supply Unit. See Starwheel Assembly on page 6-214.

5 R

The Printer Continuously Rejects Printheads

1 Clean the flex contacts on the Printhead and in the Carriage Assembly using

the Carriage Interconnect Wiper and try again. See

Tool on page 1-54.

2 If A

LL the Printheads are rejected (the status message on the Front Panel does NOT show "OK" for ALL the Printheads) then perform the Electronic Module Test. See

3. Electronics Module on page 3-21.

Cover Sensors are not Working

1 Perform the Sensors Test. See 5. Sensors on page 3-31.

heck if the cable for the faulty sensor is not damaged and is connected

2 C

correctly.

eplace the faulty Sensor.

3 R

The Line Sensor has Problems Detecting Media

1 Check the type of media that is being used since the Line sensor may have

problems detecting transparent media or some types of Non-HP media. Try loading white HP media into the Printer and check if the Line sensor detects it.

he Line Sensor is not calibrated correctly. Perform the Line Sensor

2 T

Calibration. See

Line Sensor Calibration on page 4-14.

Flex Contacts Cleaning

he Line Sensor is damaged or faulty. Replace the Line Sensor. See Line

3 T

Sensor (T1120/T1120ps/T620) on page 6-161.

HP Designjet T Series — Service Manual 1-5

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Troubleshooting

Troubleshooting Media Jams/Printhead Crashes

The failure modes "media jam" and "head crash" are grouped together because in many cases a media jam causes the media to lift up into the Carriage path and cause a Printhead crash, thus causing many media jam failures to be reported as head crashes.

d the media jam occur when loading media?

4 Di

 If the client has had media jams, it is common for pieces of media to get

stuck in the media path. Clear the media path.

When clearing a media jam, sometimes media is stuck in the paper path. To c

lear this, you must lift the Media Lever and insert thicker media into the

paper path to push out the media that is still stuck there.

5 Is the c

ustomer using non-HP media?

 The use of non-HP media can easily be the cause of media jams and

head crashes (especially head crashes because HP media is specially formulated to avoid cockle, one of the primary causes of head crashes). If the media is not HP approved, advise the customer to use HP media and check to see if the problem is now solved.

Banding at variable extreme environmental conditions

Since the Accuracy Calibration has been done at normal environmental conditions, printing in extreme environmental conditions will cause banding because the advance of the Media Advance Roller does not correspond to the same conditions that the calibration was done in. To solve the problem, try the following:

Perform the Accuracy Calibration in the new environmental conditions (Refer

the User’s Guide).

Worm marks on HP Coated media with light area fills

Light bands (S-shaped) in Paper axis direction where light area fills are printed, causing unacceptable Image Quality defect.

 Print the Service Configuration Print and check if the level of Humidity is

very low (below 30%). Increasing humidity may help in reducing the severity of the problem.

The media is causing the problem and NOT the Printer. Do not attempt to try and r

eplace Printer parts to solve this problem.

1-6 HP Designjet T Series — Service Manual

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The Media Basket was damaged during printer setup

1 There are three plastic parts that could break during printer installation and

need replacing.

heck the parts table and graphics in Parts and Diagrams to identify what

2 C

service parts you must order. See

eplace the component. See Bin Assembly on page 6-10.

3 R

Solving Media-Handling Problems

The Front Panel indicates that media is misaligned or incorrectly positioned

Printer Support on page 5-2.

Roll media

Sheet media

 The roll may be loaded the wrong way. The paper should load over the

roll toward you.

 Check that the paper is correctly loaded onto the spindle.  The paper may be loaded at an angle. The right-hand edge must be

aligned with the blue line on the Print Platen.

With 24 inch printers, ensure that the paper is wrapped tightly on the roll. T

his is a very important step to remember because if this is not done, the

media may be loaded at an angle, causing the media to be rejected.

 Check that the Right Spindle Holder (rewinder included) is properly

attached and screwed to the printer.

For 44 inch printers, the Rewinder, located on the Right Spindle Holder

ewinder included), should maintain proper back tension. If the Right

(r Spindle Holder (rewinder included) is misaligned or not properly attached to the printer, the Rewinder will not function properly.

For a graphic of a properly installed Rewinder, see

and Rewinder (T1120/T1120ps/T620) on page 6-87. To further diagnose

problems with the Rewinder, see

6. Rewinder on page 3-34.

Right Spindle Holder

 Always load sheet media using the Rear Input Tray. Do NOT load the

media as you would load roll media.

 It must be loaded with the right-hand edge against the blue line on the

Print Platen.

 The media may be crumpled or warped or may have irregular edges.  If hand-cut media is used, the edges may not form a right-angle or they

may be rough. If possible, hand-cut media should not be used. Only purchased sheet media should be used in the Printer.

 If you have problems with paper jams, check that the Overdrive is not

obstructed by bits of paper or using the Turn Drive Roller Service Utility.

1. Turn Drive Roller on page 3-57.

See

Check that the Right Spindle Holder (rewinder included) is properly attached and screwed to the printer.

For 44 inch printers, the Rewinder, locate (rewinder included), should maintain proper back tension. If the Right Spindle Holder (rewinder included) is misaligned or not properly attached to

d on the Right Spindle Holder

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The Media Basket was damaged during printer setup

the printer, the Rewinder will not function properly.

To further diagnose problems with the Rewinder, See

3-34.

6. Rewinder on page

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Print quality troubleshooting

Print Quality Troubleshooting Actions

For some Print Quality problems, a Call Agent can try and troubleshoot the Printer by requesting the Customer to perform certain actions. Using this process, most problems can resolved without the need of an on-site visit.

Use the Print Quality Troubleshooting Wizard to help customers with their pr

int quality or color problems. For information about how to use the Print

Quality Troubleshooting Wizard, see

on page 1-34.

When faced with a Print Quality problem, perform the following actions in or

der to resolve the problem:

inter Configuration:

1 Pr

 Check that the paper type loaded corresponds to the paper type selected

in the front panel and in the software. You can verify the paper type selected through the Front Panel (Main Menu/Paper menu/View loaded paper).

 Make sure that the correct Print Quality settings are used for different

types of print content. See

1- 9 for further information.

 Dry time should be set to “Optimal”.

Print Quality Troubleshooting Actions on page

Print quality troubleshooting

Print Quality Troubleshooting Wizard

erform Printhead recovery (Main Menu/Image Quality Maintenance/

2 P

Clean Printheads).

3 Medi

 Select the correct media type through the front panel when loading it.  Make sure that HP or HP-approved media is being used.

erform the Printhead Alignment (Main Menu/Image Quality Maintenance/

4 P

Align Printheads), using the same paper type with which you were experiencing unacceptable image quality, if feasible (some paper types are not suitable for Printhead Alignment).

heck if the latest version of the firmware is installed. If not, install the latest

5 C

firmware revision.

The Service Image Quality Diagnostic Print

What is the Service Image Quality Diagnostic Print?

The Printer contains an internal Image Quality Test which helps you to di

agnose the possible source of any image quality defects. The Service IQ

Diagnostic Print is available in the following options:

1 Image Q

detail the possible source of any image quality defects. It is accessible through the Service Utility Menu.

The Image Q in to three parts as follows:

 Diagnostic Part 1: Printhead Reliability Test. The purpose of this test is to

uality Service Best Plot. This plot helps you to diagnose in more

uality Service Best Plot uses the Best Print Mode and is divided

identify which Printhead is faulty.

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Print quality troubleshooting

 Diagnostic Part 2: Printhead Alignment Test. This test is designed to check

any color-to-color and bi-directional misalignment the printer may have.

 Diagnostic Part 3: Printheads and Paper Advance test. This test is

designed to check whether the Printheads and the Media Advance Mechanism are working correctly.

2 Image Q

Quality Service Best Plot but uses the Normal Print Mode.

dvanced Diagnostic Plot. These tests provide more information of the IQ

3 A

defects that we could find in the Image Quality Service plot. For more information, see

Considerations for Printing the Diagnostic Print

he IQ Diagnostic Print prints in A3 and B sizes so you must have media

1 T

loaded (roll or sheet) that is this size or larger.

se the same type of media that the customer was using when they found

2 U

the image quality problem.

the customer is using non-HP media and after the Image Quality Test you

3 If

still have the same image quality problems, change to genuine HP media and repeat the Image Quality Test.

If you do see problems with the Image Quality Test, continue with the A

dvanced Diagnostic procedures which will help you diagnose the problem.

uality Service Normal Plot. This plot is the same as the Image

The Advanced Diagnostic Prints on page 1-15.

Printing the Diagnostic Print

1 In the

2 Y

3 If

Service Utilities submenu, scroll to “Diagnostic Print” and press OK.

ou will be given three options. Use the Arrow keys to make the selection

and press the OK key to start printing the required Diagnostic Print or to enter the Advanced Diagnostics menu.

you selected the Advanced Diagnostics Prints in the previous step, use the

Arrow keys to make the required selection Paper Advance, Printhead

HP Designjet T Series — Service Manual 1-10

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Print quality troubleshooting

Alignment Diagnostic, Nozzle Health, Force Drop Detection or Print Banding P

lot, and press the Enter key to start printing.

4 Mak

5 T

e sure media is loaded, the Media Lever is lowered and that the Ink

System is correctly installed. Press the OK key to print the Diagnostic Print or press Back/Cancel to exit without printing the Diagnostic Print.

he selected Diagnostic Print will now be printed.

Reading the Diagnostic Print Results

Diagnostic Part 1: Printhead Reliability

The Nozzle Print Test test is designed to check if the Printhead nozzles print cor

rectly.

The nozzles check (top of the plot) is printed in a one-pass full swath mode. T

he diagnostics test prints out every single nozzle of each Printhead without

applying an error hiding or alignment algorithm. For each Printhead, you can see both the adjacent and the consecutive

zzles.

If any nozzles are not printing correctly each Printhead Nozzle test. There is a series of numbered stepped diagonal lines. If one or more of the nozzles are clogged, malfunctioning or mispositioned, you will see that the stepped lines are broken or misdirected in one or more places.

HP Designjet T Series — Service Manual 1-11

they will be shown on the right of

Page 16

Print quality troubleshooting

Below, the stepped lines highlighted in yellow are broken. When the line is c

ompletely broken, this means the nozzle is out.

Below, the stepped lines highlighted in yellow are misdirected. When the

ne is misdirected, this means the nozzle is malfunctioning or out of

li position.

On the left of each Printhead Nozzle test, there is a series of horizontal

traight lines. If one or more nozzles are misdirected there will be unequal

s spaces between the corresponding lines.

Corrective Action

If the printer has nozzle defects, you can s The printer can automatically compensate for nozzle defects, so there is no need to replace the Printhead.

The method of improving Nozzle Defects is to:

ecover the Printheads, using the Front Panel Main Menu/Image Quality

1 R

Maintenance/Clean Printheads option.

eprint the Printhead Nozzles Test Plot to verify that the defective nozzles

2 R

have been corrected.

3 If the

problem continues, replace the defective Printhead.

Diagnostic Part 2: Printhead Alignment

This test is designed to check any color-to-color and bi-directional mi

salignment the printer may have.

till get perfect print quality results.

HP Designjet T Series — Service Manual 1-12

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Print quality troubleshooting

1 If

the Printer is experiencing horizontal misalignment problems, the

Alignment Test will show something like this:

f the Printer is experiencing vertical misalignment problems, the Alignment

2 I

Test will show something like this:

the Printer is experiencing bi-directional misalignment problems, the

3 If

Alignment Test will show something like this:

Corrective Action

Perform the Printhead Alignment (Main Menu/Image Quality Maintenance/

lign Printheads), using the same paper type with which you were

A experiencing unacceptable image quality, if feasible (some paper types are not suitable for Printhead Alignment).

Diagnostic Part 3: Printheads & Paper Advance

This test is designed to check whether the Printheads and the Paper Advance

hanism are working correctly. This part of the Image Quality Test should

Mec NOT be used to check for color consistency or accuracy.

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Print quality troubleshooting

Banding

If the Printer is experiencing a banding problem, you will see repetitive hor

izontal bands within the printed image.

 Darker horizontal bands or lines repeated along the vertical band (from

top to bottom at the same distance).

 Whiter horizontal bands or lines along the vertical band (from top to

bottom at the same distance).

The plot is printed in Best or Normal mode (according to the menu option s

elected) with Error Hiding ON. The top band has 100% ink density patches

while the bottom band has 50% ink density patches.

Troubleshooting Banding Problems

If banding doe Printhead problem. In this case, try the following:

heck that the appropriate print quality settings are being used (refer to the

1 C

User’s Guide for more information).

ecover the printheads using the option through the Front Panel (Main

2 R

Menu/Image Quality Maintenance/Clean Printheads). Reprint the Diagnostic Print or the print file and if the problem persists, replace the faulty Printhead.

If banding doe Advance problem:

s NOT occur in ALL the colors, then it is more than likely a

s occur in ALL the colors, then it is more than likely a Paper

 If the bands are light, it means that the paper has advanced too much.  If the bands are dark, it means that the paper hasn’t advanced enough.

HP Designjet T Series — Service Manual 1-14

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Print quality troubleshooting

 In high quality modes, graininess in ALL colors can indicate problems

either with alignment or Paper Advance.

Corrective Action

In order to solve problems that result in banding, try the following:

heck that the appropriate print quality settings are being used (refer to the

1 C

User’s Guide for more information).

heck that the loaded media is the same type as selected in the printer. You

2 C

can verify the media type selected through the Front Panel (Main Menu/ Paper menu/View loaded paper).

the customer is using low quality paper, try recommending better quality

3 If

paper (preferably HP paper). Printer performance can only be guaranteed by using recommended papers.

erform the Paper Advance Calibration using the same type of paper that

4 P

will be used for the final print (Main Menu/Image Quality Maintenance/ Paper Advance Calibration/Calibrate Paper Advance).

If there is white point banding in only one color band and the problem cannot be f a drop detection option can fix this issue. See

1-2 4.

ixed using the Printhead recoveries, in some cases using the force

Force Drop Detection on page

No Printing Defects Found in the Diagnostic Print

If all the test patterns from the Diagnostic Print are correct and you still e

xperience Image Quality problems, you can use the following procedures

to resolve the problem.

 Reading the Advanced Diagnostic Print Results  Printhead Alignment  Nozzle Health  Force Drop Detection

The Advanced Diagnostic Prints

What are the Advanced Diagnostic Prints?

Advanced Diagnostic Plot. defects found in the Image Quality Service plot.

The Adva

 Visual Media Advanced Diagnostic. Used to check advance reliability.  Printhead Alignment Diagnostic. Used to check pen alignment reliability.  Visual Nozzle health Diagnostic. Used to check nozzle health reliability.  Force Drop Detection. Used to reset the nozzle health historic data base

nced Diagnostic Plot is divided into the following parts:

and force new drop detection.

These tests provide more information of the IQ

HP Designjet T Series — Service Manual 1-15

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Print quality troubleshooting

Printing the Advanced Diagnostics Print

1 In the

2 Y

3 F

Service Utilities submenu, scroll to “Diagnostic Print” and press OK.

ou will be given three options. Use the Arrow keys to select the Advanced

Diagnostics menu.

rom the displayed options, use the Arrow keys to make the required

selection Paper Advance, Printhead Alignment Diagnostic, Nozzle Health, Force Drop Detection or Print Banding Plot, and press the OK key to start printing.

4 Mak

5 T

e sure media is loaded, the Media Lever is lowered and that the Ink

System is correctly installed. Press the OK key to print the Diagnostic Print or press Back/Cancel to exit without printing the Diagnostic Print.

he selected Advanced Diagnostic Print will now be printed and, if

necessary, automatically scanned.

Reading the Advanced Diagnostic Print Results

Paper Advance

This plot helps you to visually check any alignment problems of the printer. Y

ou use it to precisely measure the media advance error with a one dot row

accuracy, and to verify the stability of the media advance.

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Print quality troubleshooting

The whitest vertical line should be positioned in the 0 offset column with mino

r variations between +2 and -2 columns. If the offset is not positioned

on the 0 column or between +2 and -2 columns and the whitest vertical varies greatly, the printer requires Paper Advance Calibration Image Quality Maintenance/Paper Advance Calibration/Calibrate Paper

Adva

nce).

It is very important to verify that the loaded media is the same media type as sel

ected in the front panel. You can verify the media type selected through the Front Panel (Main Menu/Paper menu/View loaded paper). The wrong type of paper selected will produce an offset error in the Paper Advance.

(Main Menu/

HP Designjet T Series — Service Manual 1-17

Page 22

Print quality troubleshooting

The following plot shows correct media advance, there is a straight white line po

sitioned close to the 0 column for the majority of the points.

HP Designjet T Series — Service Manual 1-18

Page 23

Print quality troubleshooting

The following plot shows a bad media advance, there is a straight white line po

sitioned close to the -6 column, instead of the 0 column for the majority of

the points.

Corrective Action

To fix Paper Advance problems, try the following:

1 C

heck the Paper Advance Calibration Status. This can be done by going to Main Menu/Paper/View Loaded Paper. At the bottom, the Front Panel displays the Paper Advance Calibration status. There are three status messages:

 DEFAULT. The paper loaded is recognized as HP paper, which is

already optimized and calibrated for the printer. Do Not calibrate the Paper Advance for this paper.

 RECOMMENDED. The paper loaded is NOT recognized as HP paper,

and Paper Advance values have NOT been customized for this paper type. In this case, calibrate the Paper Advance from the user menu.

 OK. This indicates that the paper loaded has been calibrated before. If

the printer continues to have banding and graininess problems, calibrate the Paper Advance from the user menu.

Whenever the printer's firmware is upgraded, the paper advance calibr

ation values will be reset to factory default.

o calibrate the Paper Advance from the user menu, go to Main Menu/

2 T

Image Quality Maintenance/Paper Advance Calibration/Calibrate Paper Advance.

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Print quality troubleshooting

It is very important to verify that the loaded media is the same media type as sel

Some paper types are not suitable for Paper Advance Calibration. Do NOT use color film, matte film, tracing paper, or vellum.

aper Advance calibration from the user menu will only calibrate the Paper

3 P

Advance for the paper type loaded in the printer at that moment.

Calibrate Paper Advance has mostly solved the problem, try Adjust Paper

4 If

Advance to fine tune the Paper Advance (Main Menu/Image Quality Maintenance/Paper Advance Calibration/Adjust Paper Advance).

Select the percentage of change from -100% to 100%. To correct light banding percentage.

he Paper Advance calibration from the service menu will calibrate the

5 T

Paper Advance for ALL paper types. This action is recommended when:

ed papers or transparent materials such as translucent bond, clear

, decrease the percentage. To correct dark banding, increase the

 The Paper Advance calibration from the user menu does NOT solve the

problem.

 The Paper Advance problems affect ALL paper types.

The procedure for Paper Advance Calibration from the service menu is

umented in Chapter 5, Service Calibrations. See

doc

Calibration on page 4-6.

Paper Advance

Printhead Alignment

To ensure you obtain meaningful results, use the same type of media that t

he customer was using when they encountered the image quality problem.

This plot helps you to visually check any alignment problems of the printer. Y

ou use it to precisely measure the alignment error with a 3 dot row accuracy. For the printer to be considered correctly aligned, the results must be within ±3 dot row.

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Page 25

Print quality troubleshooting

The illustration shows the complete Printhead Alignment that identifies each

f the specific alignment test results covered.

The Printhead Alignment Diagnostic print sh results:

ine Sensor Calibration

a L

en to Pen Align

b P

rriage thetaZ

c Ca

directional align (high)

d Bi

directional align (Low)

e Bi For tests a, b, and c, the order of the color band is:

For tests e and

Once the printer has correctly printed and scanned the Printhead Alignment Di

agnostic print, the Front Panel displays the results. The top row displays the

printhead, and the left column displays the test.

f, the order of the color band is:

ows the following diagnostic test

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Print quality troubleshooting

The results are seperated onto two screens. Use the A the second results screen.

Any printhead with a test result containing dot row range is misaligned.

The mK printhead is used as a reference to test the other printheads. If all t

he printheads fail the Pen to Pen tests, it is the mK printhead that is

misaligned.

a number that is not within the ±3

rrow keys to display

Reading the Printhead Alignment Diagnostic Print

The following plot shows correct printhead alignment for all patterns. The

lear band is in the center of the pattern.

The following plot shows bad printhead alignment. The clear band is not in

center of the pattern.

the

Corrective Action

 If any of the printheads are misaligned beyond the ±3 dot row range,

perform a Printhead Alignment. See

Aligning Printheads on page 1-48.

 If a Printhead Alignment does not correct the problem, replace the bad

printhead.

If the customer is using non-HP media and af still have the same image quality problems, change to genuine HP media and repeat the Image Quality Test. The best alignment calibration is obtained using HP Photo Paper.

ter the Image Quality Test you

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Page 27

Print quality troubleshooting

Nozzle Health

The print contains three separate parts.

b c

a T

he Variable Frequency Nozzle health plot with odd/even nozzles separation. This is used to detect misdirected nozzles, weak nozzles, or nozzles not working correctly at all frequencies.

spector measuring tool test plot.

b In

Test b should NOT be used by Service Engineers.

c Nozzle Print Test

which is also part of the Image Quality Service Plot. This test is designed to check that the Printhead nozzles print correctly. The test prints out every single nozzle of each Printhead. No error hiding or Printhead Alignment algorithm is applied. For each Printhead, you can see both the adjacent and the consecutive nozzles.

This is what you would see in the N

ozzle Print Test part if there are

nozzles not printing correctly:

n the right of each Printhead Nozzle test, there is a series of numbered

1 O

stepped diagonal lines. If one or more of the nozzles are malfunctioning or mis-positioned, you will see that the stepped lines are broken or misdirected in one or more places.

2 On

the left of each Printhead Nozzle test, there is a series of horizontal straight lines. If one or more nozzles are misdirected there will be unequal spaces between the corresponding lines.

Corrective Action for Nozzle Defects

If the printer has nozzle defects, it

does not mean that you will not get perfect print quality results. The printer has automatic procedures to hide many nozzle defects.

ecover the Printheads using the option through the Front Panel (Main

1 R

menu/Image quality maintenance/clean printheads).

eprint the Nozzle Print test to check that the defective nozzles have been

2 R

corrected.

3 If the

problem continues, replace the defective Printhead.

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Page 28

Force Drop Detection

If the N one color that cannot be fixed with a printhead recovery, you can use this option to resolve the problem by resetting the nozzle health data base so that all nozzles are assumed to be correct.

Once the nozzle health data base has b The normal cause of this white point banding in

incorrect detection of failed nozzles by the drop detector.

ozzle Print Test plot has persistent white point banding in only

Troubleshooting Print Quality Problems

Print Quality General Advice

o achieve the best performance from the printer, only genuine HP

1 T

accessories and supplies should be used.

2 Mak

e sure that the paper type selected in the Front Panel is the same as

the paper type loaded into the Printer.

Print quality troubleshooting

een reset drop detection is forced.

a single color is the

3 Mak

4 C

5 C

e sure to use the most appropriate print quality settings for your

purposes. A lower print quality is likely to be seen if the print quality slider has been moved to the Speed end of the scale, or the custom quality level set to Fast.

heck that the environmental conditions (temperature, humidity) are within the temperature/humidity range as specified for the Printer (refer to the User’s Guide for more information).

heck that the ink cartridges and printheads have not exceeded their expiration dates.

Horizontal Lines Across the Image (Banding)

Description of problem

When you look at the image you have printed, there are horizontal lines

ross the image. Shown below is an example of what you might see if you

ac have this problem:

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Print quality troubleshooting

Corrective Action

heck that the paper type loaded corresponds to the paper type selected in

1 C

the front panel and in the software. You can verify the paper type selected through the Front Panel (Main Menu/Paper menu/View loaded paper).

heck that the appropriate print quality settings are being used (refer to the

2 C

User’s Guide for more information) and reprint the image. In some cases print quality problems can be resolved by selecting a higher print quality level.

int the Service Image Diagnostics Print, and clean any printheads that

3 Pr

need cleaning. Reprint the job in case the problem has been solved

4 Check the paper advance calibration status. If the status is PENDING,

perform the Paper Advance Calibration (Main Menu/Image Quality Maintenance/Paper Advance Calibration/Calibrate Paper Advance).

fter calibration reprint the job.

5 A

atch the printer carriage when it reaches the end of its swath. If there is an

6 W

unexpected delay, this may cause the banding.

This delay is possibly the result of the following:

 The user is performing tasks with other applications while printing

(particularly image processing applications). These applications are using too many computer resources, and the computer cannot effectively process the print job.

 The file to be printed is complex, and the computer does not have the

capacity to print such complex files.

 If printing over a LAN, it is possible that the LAN is too slow to meet the

requirements of the print job.

If this is the case, the following corrective measures can be taken:

1 Do

not use the computer while printing. Close applications that use a large

amount of computer resources.

onvert the file PDF. Formats like PDF require less resources to print, which

2 C

may solve your banding problem.

Lines are Missing, Too Thin, or Too Thick

Description of problem

Shown below is an example of what you

Corrective Action

heck that the paper type loaded corresponds to the paper type selected in

1 C

the front panel and in the software. You can verify the paper type selected

HP Designjet T Series — Service Manual 1-25

might see if you have this problem:

Page 30

Print quality troubleshooting

through the Front Panel (Main Menu/Paper menu/View loaded paper).

heck that the appropriate print quality settings are being used (refer to the

2 C

User’s Guide for more information). Select the custom print quality options in the Print dialog, and if you are using best quality and glossy paper, try turning on the Maximum detail option. Reprint the job in case the problem has been solved.

3 If the

4 C

5 C

6 U

resolution of the image is greater than the printing resolution, a loss of line quality may be seen. You can find the Max. Application Resolution option in the Windows driver dialog's Advanced tab, under Document Options > Printer Features. Reprint the job in case the problem has been solved.

heck the Printhead alignment status. If the status is PENDING, perform the Printhead Alignment (Main Menu/Image Quality Maintenance/Align Printheads). After alignment reprint the job.

heck the paper advance calibration status. If the status is PENDING, perform the paper advance calibration (Main Menu/Image Quality Maintenance/Paper Advance Calibration/Calibrate Paper Advance). After calibration reprint the job.

se Part 3 of the Image Quality Diagnostic Print, check if there are a significant amount of nozzles out in the color that is actually causing the problem (if see you a problem with the Black color in the customer print, then only check the Black printhead in the Image Quality Diagnostic Print). If there is a significant amount of nozzles out then replace the defective Printhead.

Problems with Stepped Lines

Description of problem

When you look at the image you have printed there are ‘ the borders of arrows and diagonal lines. The lines should be straight with no stepping.

Shown below is an example of what y with Stepped Lines:

ou might see if you have problems

stepped lines’ in

Corrective Action

he problems may be inherent in the image that you are trying to print. Try

1 T

to improve the image with the application that generated the file.

heck that the appropriate print quality settings are being used (refer to the

2 C

User’s Guide for more information).

elect the custom print quality options in your Print dialog, and if you are

3 S

using Glossy media and BEST quality, turn on the Maximum Detail option.

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Print quality troubleshooting

4 C

hange the image rendering resolution to 300 dpi (only in EconoMode Printmode) or 600 dpi depending on the printing needs. You can find the Max. Application Resolution option in the Windows driver dialog's Advanced tab, under Document Options > Printer Features.

Lines are Printed Double or in Wrong Colors

Description of problem

This problem can have various visible symptoms, as shown below:

Colored lines are printed double, in

different colors

Corrective Action

eseat the Printheads by removing them and then reinserting them.

1 R

As you reseat the printheads, the printer will automatically align the pr

intheads. It is important that the alignment is completed properly. See

Aligning Printheads on page 1-48.

Lines are discontinuous

If the lines are broken in the following way:

1 C

heck that the appropriate print quality settings are being used (refer to the User’s Guide for more information).

eseat the Printheads by removing them and then reinserting them.

2 R

As you reseat the printheads, the printer will automatically align the pr

intheads. It is important that the alignment is completed properly. See

Aligning Printheads on page 1-48.

Borders of colored blocks are wrongly

colored

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Print quality troubleshooting

Lines are Blurred (Ink Bleeds from Lines)

Description of problem

This problem is often caused by the ink soaking into the paper, making the line

s blurred and fuzzy. This could be because of the humidity in the air.

Corrective Action

heck that the environmental conditions (temperature, humidity) are suitable

1 C

for high-quality printing.

2 Mak

3 T

e sure that the paper type selected in the Front Panel is the same as

the paper type loaded into the Printer.

ry using a heavier paper type. When printing dense colors, it is recommended to use HP Heavyweight Coated Paper or HP Super Heavyweight Coated Paper.

glossy paper is being used, try changing to a different type of glossy

4 If

paper.

lign the printheads. See Image Quality Maintenance Procedure on page 1-

5 A

48.

Problems with Graininess

Description of problem

Shown below is an example of what y with graininess:

Corrective Action

heck that the paper type loaded corresponds to the paper type selected in

1 C

the front panel and in the software. You can verify the paper type selected through the Front Panel (Main Menu/Paper menu/View loaded paper).

heck that printing is on the correct side of the paper.

2 C

ou might see if you have problems

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Print quality troubleshooting

3 C

heck that the appropriate print quality settings are being used (refer to the User’s Guide for more information). In many cases, you can correct grainy printing by raising the print quality settings. Reprint the job in case the problem has been solved.

heck the Printhead alignment status. If the status is PENDING, perform the

4 C

Printhead Alignment (Main Menu/Image Quality Maintenance/Align Printheads). After alignment reprint the job.

heck the paper advance calibration status. If the status is PENDING,

5 C

perform the paper advance calibration (Main Menu/Image Quality Maintenance/Paper Advance Calibration/Calibrate Paper Advance).

fter Paper Advance Calibration, reprint the job.

6 A

Paper is not Flat

Description of problem

If the paper does not lie flat when it comes out of the Printer, but has shallow

aves in it, you are likely to see visible defects in the printed image, such as

w vertical stripes. This can happen when you use thin paper that becomes saturated with ink.

Shown below is an example of what y with the paper not being flat:

ou might see if you have problems

Corrective Action

heck that the paper type loaded corresponds to the paper type selected in

1 C

the front panel and in the software. You can verify the paper type selected through the Front Panel (Main Menu/Paper menu/View loaded paper).

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Print quality troubleshooting

2 T

ry using a heavier paper type. When printing dense colors, it is recommended to use HP Heavyweight Coated Paper or HP Super Heavyweight Coated Paper.

Ink marks on the paper

This problem may occur for several different reasons.

Horizontal smears on the front of coated paper

If a lot of ink is used on plain or coated paper, the paper absorbs the ink

uickly and expands. As the printheads move over the paper, the printheads

q may come into contact with the paper and smear the printed image. This problem is normally seen only on cut sheets of paper (not on roll paper).

Corrective Action

heck that the paper type loaded corresponds to the paper type selected in

1 C

the front panel and in the software. You can verify the paper type selected through the Front Panel (Main Menu/Paper menu/View loaded paper).

se a recommended paper type and the correct print settings.

2 U

using sheet paper, try rotating the sheet 90 degrees. The orientation of the

3 If

paper fibers may affect performance.

ry using a heavier paper type. When printing dense colors, it is

4 T

recommended to use HP Heavyweight Coated Paper or HP Super Heavyweight Coated Paper.

ry to increase the margins by relocating the image to the center of the page

5 T

with the software application being used.

Ink marks on the back of the paper

This can happen after a lot of border less printing, especially with non-

tandard paper sizes. Ink residues on the platen are likely to mark the back

s of the paper.

Corrective Action

 Clean the platen with a soft cloth. Clean each rib separately without

touching the foam between the ribs.

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Print quality troubleshooting

Problems with the Edges of objects

Stepped or not sharp

The edges of objects or lines appear to be poorly defined or lighter in densit

y than expected.

Corrective Action

 If the print quality slider has already been set to Quality in the Print

dialog, select the custom print quality options, and try setting the quality level to Normal (refer to the User’s Guide for more information).

Darker than expected

The edges of objects seem darker than expected.

Corrective Action

 If the print quality slider has already been set to Quality in the Print

dialog, select the custom print quality options, and try setting the quality level to Normal.

Black and white prints do not look neutral

Consider printing in grayscale (color opti preference menu). See the User´s Guide for more information.

Horizontal lines at the end of a cut sheet print

There is a type of defect that only affects the end of a print, within

pproximately 30 mm of the trailing edge of the paper. Some very thin

a horizontal lines may be seen across the print.

Corrective Action

int the Service Image Diagnostics Print, and clean any printheads that

1 Pr

need cleaning. Reprint the job in case the problem has been solved

2 Try printing with roll paper.

ry using larger margins around the image.

3 T

Vertical lines of different colors

The print has vertical bands of different colors along it.

ons submenu inside the printing

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Page 36

Print quality troubleshooting

Corrective Action

ry using a heavier paper type. When printing dense colors, it is

1 T

recommended to use HP Heavyweight Coated Paper or HP Super Heavyweight Coated Paper.

se higher print quality settings (refer to the User’s Guide for more

2 U

information).

White spots on the print

White spots are seen on the print. This is probably due to paper fibers, dust,

se coating material.

or loo

Corrective Action

lean the paper manually with a brush before printing, to remove any loose

1 C

fibers or particles.

lways keep the cover of the printer closed.

2 A

otect paper rolls and sheets by storing them in bags or boxes.

3 Pr

Problems with Color Accuracy

Corrective Action

1 Ensur

e that the paper type being used has been color calibrated, which will

give color consistency

from print to print, and from Printer to Printer.

2 Check that printing is on the correct side of the paper.

heck that the appropriate print quality settings are being used (refer to the

3 C

User’s Guide for more information). Reprint the job in case the problem has been solved.

the problem consists of color differences between your print and your

4 If

monitor, please follow the instructions in the "How to calibrate your monitor" section of the HP Color Center. At this point, you may wish to reprint your job in case the problem has been solved.

elect suitable options in the application (refer to the User’s Guide for more

5 S

information).

HP Designjet T Series — Service Manual 1-32

Page 37

Print quality troubleshooting

6 Pr

int the Service Image Diagnostics Print, and clean any printheads that

need cleaning. Reprint the job in case the problem has been solved

Color accuracy using EPS or PDF images in page layout applications

Page layout applications such as Adobe InDesign and QuarkXPress do not su

pport color management of EPS, PDF, or grayscale files.

If these types of files have to be used, try to ensure that the EPS, PDF, or gr

ayscale images are already in the same color space that is intended to be used later on in Adobe InDesign or QuarkXPress. For instance, if the final objective is to print the job in a press that follows the SWOP standard, at the time of creating the EPS, PDF or grayscale the image should be converted into SWOP.

Output Only Contains a Partial Print

If the output that was expected only cont following to resolve the problem:

ains a partial image, then try the

1 Wa

2 Th

3 T

4 Mak

5 If

s the Cancel key pressed before all the data was received by the

Printer? If so, send the file again and make sure that the Cancel key is not pressed.

e I/O Timeout setting may be too short. Increase the I/O timeout setting

(Setup Menu/I/O Setup/IO Timeout) and then send the file again.

here might be a communications problem between the Printer and Computer. Check the USB or network cable between the computer and the Printer to make sure it is not damaged and is connected correctly.

e sure that the software settings are correct for the current page size

(e.g. long-axis prints).

network software is being used, make sure it has not timed out.

Problems with Image Clipping

This normally indicates a discrepancy between the actual printable area on the load kind of problem can often be identified before printing by previewing the print.

ed paper and the printable area as understood by the software. This

 Check the actual printable area for the paper size that is loaded.

printable area = paper size – margins

 Check what the software understands to be the printable area (which it

may call “printing area” or “imageable area”). For example, some software applications assume standard printable areas that are larger than those used in this Printer.

 If a custom page size with very narrow margins has been defined, the

printer may impose its own minimal margins, clipping the image slightly. Consider using a larger paper size, or border less printing.

 If the image contains its own margins, it may be possible to print it

successfully by using the Clip Contents by Margins option.

 If a very long image needs to be printed on a roll, check that the software

is capable of printing an image of that size.

 The page may have been rotated from portrait to landscape on a paper

size that is not wide enough.

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Print quality troubleshooting

 If necessary, change the printable area in the software.  If necessary, reduce the size of the image or document in your software

application, so it fits between the margins

Another Possible Explanation

Some applications, such as Adobe Photoshop, Adobe Illustrator, and

orelDRAW, use an internal 16–bit coordinate system which means that they

C cannot handle an image of more than 32,768 pixels. If you try to print an image larger than this from these applications, the bottom of the image will be clipped. In this case, the only way to print the whole image is to reduce the resolution so that the whole image requires fewer than 32,768 pixels. The HP-GL/2 printer driver contains an option called Compatibility with 16– bit applications, which can be used to reduce the resolution of such images automatically. This option can be found option in the Advanced tab, under Document Options > Printer Features.

Some objects are missing from the printed image

Large quantities of data may be necessary to print a high-quality large-

ormat print job, and in some specific workflow there may be issues that can

f lead to some objects missing from the output.

Corrective Action

 In the Advanced tab, select Document options, Printer features, and set

Send job as bitmap to Enabled (HP-GL/2 driver only).

 In the Advanced tab, select Document options, Printer features, and set

16-bit App. Compatibility to Enabled.

 In the Advanced tab, select Document options, Printer features, and set

Max. Application resolution to 300.

The above settings are mentioned for troubleshooting purposes and may ad

versely affect the final output quality or the time necessary to generate the print job. Therefore, they should be restored to their default values if they do not help to solve the problem.

When working under Mac OS, the above settings are not available. Instead,

y reducing the resolution of bitmap images in the application software

tr being used.

A PDF file is clipped or objects are missing

In older versions of Adobe Acrobat or Adobe Reader, large PDF files could

clipped or lose some objects when printing with the HP-GL/2 driver at

be high resolution. Upgrade the Adobe Acrobat or Adobe Reader software to the latest version. From version 7 onwards, these problems should be solved.

Print Quality Troubleshooting Wizard

Here we describe the main guidelines that a customer can follow to troubleshoot print quality and/or color issues, whenever a customer calls HP Support complaining about having any kind of printing quality problems or artifacts.

The Print Quality (PQ) troubleshooting Wizard is a set of processes and

rective actions that the customer can trigger in the printer whenever the

cor print quality of the printer does not meet their expectations.

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Print quality troubleshooting

Some of these corrective actions that the customer can perform to enhance the

print and/or color quality are: printhead cleaning, media advance

calibration, printhead alignment, and color calibration. The main benefits of this Print Quality Troubleshooting Wizard tool are that it

reates a better customer experience, solving customer PQ issues fast,

efficiently, and with a minimum cost for them and also for HP Support. Customers can perform PQ/color trouble

(PU), the Embedded Web Server (EWS) or by following the steps described in the User’s Manual or the HP Knowledge Center.

shooting through the Printer Utility

Print Quality Troubleshooting Wizard main window

When to use the Print Quality troubleshooting tool:

The Print Quality Troubleshooting Wizard can help customers solve their

/color problems without the need to call to HP Support. Some of the

PQ problems for which it can help are the following:

 Troubleshooting area fill uniformity issues such as:

– Horizontal lines across the image (banding) – The entire image is blurry or grainy (graininess)

 Troubleshooting line and text quality issues such as:

– Lines are too thick, too thin, or missing – Lines appear stepped or jagged – Lines print double or in the wrong colors – Lines are discontinuous – Lines are blurred

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Print quality troubleshooting

 Troubleshooting color issues such as:

– Colors are inaccurate

 Troubleshooting printhead reliability issues

Corrective actions a customer can perform:

The corrective actions on the printer’s systems that the customer can perform t

o enhanced the print and/or color quality are:

 Clean Printheads is recommended only if the customer is

experiencing problems with print quality where we know that printhead cleaning will help.

 Calibrate Paper Advance is used to adjust the printer’s parameters

for use with different types of print media. This only affects the physical movement of paper and does not affect the color calibration profiles.

 Align Printheads is recommended only if the customer is experiencing

problems with print quality where we know that proper printhead alignment will help (i.e. graininess).

 Calibrate Color is recommended only if the customer is experiencing

problems with color print quality where we know that proper color calibration with help (i.e. color accuracy).

Troubleshooting for banding issues

How to start the Print Quality Troubleshooting Wizard

rom the HP Printer Utility under Windows: go to the Support tab, and

1 F

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Page 41

Print quality troubleshooting

select P

2 F

quality troubleshooting.

rint quality troubleshooting.

rom the Embedded Web Server: go to the Support tab, then select Print

For Mac OS

rom the HP Printer Utility under Mac OS: select Support, and then Print

1 F

quality troubleshooting.

rom the Mac OS Print dialog: go to the Services panel, select Device

2 F

Maintenance, then select Print quality troubleshooting from the list of maintenance tasks.

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Page 42

Ink Supplies Troubleshooting

Introduction to ink supplies

What are Ink Supplies?

For each of the ink colors used in the printer, there are two components, the Pr

inthead and Ink Cartridge. These components are called Ink Supplies.

Ink Supplies Troubleshooting

Ink Cartridges

The printer's six Ink Cartridges provide matte black, magenta, yellow, cyan, gr

ay and photo black ink to the Printheads. The color Ink Cartridges

supplied with the printer have a capacity of 69 ml but optional 130 ml are also available

All these ink cartridges are physically the same size. Only the internal capacity varies.

Printheads

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Page 43

Ink Supplies Troubleshooting

The Ink Cartridges for the T printer series require no maintenance or c

leaning. As long as each Ink Cartridge is inserted correctly into its slot, the ink will flow to the Printheads. Because the Printheads control the amount of ink transferred to the page, you will continue to see high-quality printing results even when the ink levels are getting low.

The front panel displays the status of the Ink Cartridge. Using the front panel,

ailed information can be checked on the Ink Cartridges.

det

Available Ink Cartridges

T Printer Series Cartridges Part

number

HP 72 69 ml Photo Black Ink Cartridge

Ink Cartridge C9397A

HP 72 69 ml Cyan Ink Cartridge Ink Cartridge C9398A HP 72 69 ml Magenta Ink

rtridge

HP 72 69 ml Yellow Ink Ca

rtridge

Ink Cartridge C9399A

Ink Cartridge C9400A

HP 72 69 ml Gray Ink Cartridge Ink Cartridge C9401A HP 72 130 ml Matte Black Ink

rtridge

HP 72 130 ml Photo Black Ink Ca

rtridge

HP 72 130 ml Cyan Ink Ca

rtridge

HP 72 130 ml Magenta Ink Ca

rtridge

HP 72 130 ml Yellow Ink Ca

rtridge

Ink Cartridge C9403A

Ink Cartridge C9370A

Ink Cartridge C9371A

Ink Cartridge C9372A

Ink Cartridge C9373A

HP 72 130 ml Gray Ink Cartridge Ink Cartridge C9374A

theads

Prin

The Printheads are extremely durable and

do not need to be replaced every time an Ink Cartridge is replaced. They are independent of the Ink Cartridges and will continue giving excellent image quality results even if the

Ink Cartridges are low on ink.

HP Designjet T Series — Service Manual 1-39

Page 44

Ink Supplies Troubleshooting

If you notice a decline in print quality such as lines or dots missing from text/ gr

aphics, see

Available Printheads

Troubleshooting Print Quality Problems on page 1-24.

Printhead Type Printer Model Part

number

HP 72 Gray & Photo Black

inthead

HP 72 Magenta & Cyan Printhead C9383A

HP 72 Matte Black & Yellow

inthead

General Information About the Ink Supplies

For optimum results from the printer and modular ink delivery system always f

ollow these guidelines when handling the ink supplies:

All

C9380A

C9384A

 Always install the Ink Cartridges and Printheads before the expiration

date, which is on the packaging.

 Install Ink Cartridges and Printheads in their color-coded slots.  Follow the instructions on the front panel of the Printer during installation.  Avoid unnecessary removal of the Ink Cartridges and Printheads.  When turning off the Printer always use the power Off button on the front

panel. The Printheads are then stored correctly which prevents them from drying out.

 The Ink Cartridges should never be removed while the printer is printing.

They should only be removed when the printer is ready for you to replace them. The front panel will guide you through the removal and installation procedure.

General Precautions When Handling Ink Supplies

Use the following precautions when handling Ink Supplies:

Do not touch, wipe or attempt to clean the printhead nozzles. This can damag

e the printhead.

 Handle the ink supplies with care. In particular the Printhead, which is a

high precision device and must be handled carefully.

 Do not touch the Printhead nozzles.  Do not put the Printhead down on the nozzles.  Do not be rough when handling the Printheads. Always set them down

gently.

 Do not drop the Printheads.  Proper handling will assure optimum performance throughout the

Printhead life.

 Do not touch the end of the Ink Cartridge which is inserted into the printer

as there may be a small amount of ink on the connection.

 Avoid storing partially used Ink Cartridges on their ends.

HP Designjet T Series — Service Manual 1-40

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Ink Supplies Troubleshooting

When Should You Replace the Ink Supplies?

When to change the ink supplies is mostly determined by you with guidance f

rom the front panel. In conjunction with the messages displayed in the front panel and the message explanations in this chapter, you will be able to choose for yourself when is the right time to change the ink supplies.

The Printer will also display the ink level and will tell you when the ink supply

w on ink. This means you have constantly updated information about the

is lo ink supplies.

Ink Cartridge Levels, Information, and Replacement

Ink Cartridge Levels

The front panel displays Ink Levels shown as level bars. These bars represent

w much ink is remaining in the Ink Cartridges: as ink is used up the bars

ho get shorter in length.

There are two methods for checking the ink levels of your Ink Cartridges.

“View Ink Levels” Direct Access Key

 Pressing the “View ink levels” direct access key on the Front Panel will

immediately show you the ink levels. For more information about direct access keys, see

Using the Front Panel on page 1-3

“View Ink Levels” from the ink menu

 Choosing the View ink levels option from the Ink menu will

immediately show you the ink levels:

Obtaining Ink Cartridge Information

1 S

croll to the Ink Menu icon and press OK.

HP Designjet T Series — Service Manual 1-41

Page 46

Ink Supplies Troubleshooting

2 In the Ink Men

OK.

3 In the Ink C

want information on and press OK.

he front panel displays information on the selected Ink Cartridge. Use the

4 T

Arrow keys to scroll through the information.

u submenu, scroll to Ink cartridge information and press

artridge Information submenu, scroll to the Ink Cartridge that you

The information supplied is:

 The color of the Ink Cartridge  The make of the Ink Cartridge (hp no.72 is recommended).  The product number of the Ink Cartridge.  The serial number of the Ink Cartridge.  The current status of the Ink Cartridge.  The current ink level of the ink cartridge in milliliters.  Original capacity of the ink cartridge in milliliters.  The Expiration Date of the ink cartridge.  The manufacturer of the Ink Cartridge (hp is recommended).  The current warranty status of the Ink Cartridge.

HP Designjet T Series — Service Manual 1-42

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Ink Supplies Troubleshooting

The printer consumes more gray ink ink than M, C, or Y

This is not a problem, and no action should be taken to “correct” this at

tribute of the printer.

In general the higher frequency of change is because Matte Black ink is the one that coated, HW coated, natural tracing paper, etc.), which are the types of contents that are more commonly printed with this type of printer.

About gray ink

The T Series Printers are the first HP Designjet technical products to include Gr quantities than Cyan, Magenta and Yellow inks. This happens because of the following reasons:

1) Gray areas (which are very typical in technical drawings) can now be pr combining Cyan, Magenta and Yellow inks. This means that Gray ink is used more frequently than the rest of the inks (C, M, Y) which are now used less frequently, so the difference in consumption is noticeable. However overall the T Series Printers will actually need to use in total less ink to print gray areas than previous Designjet products.

2) Soft colors can now be printed by combining C, M and Y inks with Gray.

he addition of Gray ink softens the color, improving transition areas. It also

T allows printing soft colors by using less C, M and Y. These two types of contents are very typical and make the consumption of Gray to increase and the consumption of C, M and Y to decrease.

is used for lines and black objects in technical papers (bond,

ay ink. One thing that users may notice is that Gray ink is used in higher

inted by using only Gray ink. In the past, these areas had to be printed by

Conclusion

However, no matter the combination of inks that are used, when the total

f ink are added up, the T Series Printers will always have a lower ink

cc’s o consumption than the HP Designjet 500, 800 and 1000 series for equivalent contents with equivalent levels of print quality.

Changing an Ink Cartridge

There are two occasions when you need to remove an ink cartridge:

 The ink cartridge is very low and you want to replace it with a full

cartridge for unattended printing (you can use up the remaining ink in the first cartridge at a more convenient time).

 The ink cartridge is empty or faulty, and you must replace it to continue

printing.

Do not try to remove an ink cartridge while printing.Remove an ink ca

rtridge only if you are ready to insert another one.

Make sure the printer wheels are locked (the brake lever is pressed down) to pr

event the printer from moving.

Change an ink cartridge using the following procedure:

HP Designjet T Series — Service Manual 1-43

Page 48

1 S

croll to the Ink Menu icon and press OK.

Ink Supplies Troubleshooting

2 In the

3 T

4 Pr

5 O

6 P

7 T

Ink Menu submenu, scroll to Replace ink cartridges and press

OK.

he front panel displays the status of the Ink Cartridges.

ess OK to continue.

pen the relevant Ink Cartridge cover for the Ink Cartridge you want to

replace.

ull the required Ink Cartridge straight up to remove it from the printer.

he front panel indicates the missing Ink Cartridge.

efore removing the cartridge from its wrapping, shake it vigorously.

8 B

wrap the new ink cartridge, find the label identifying the ink color. Check

9 Un

that the letter or letters marking the empty slot, matches the letter or letters on the cartridge label.

10 Ins

HP Designjet T Series — Service Manual 1-44

ert the ink cartridge into its slot.

Page 49

Ink Supplies Troubleshooting

11 P

ush the cartridge into the slot until it snaps into position. You should hear a

beep and see confirmation that the cartridge has been inserted.

12 W

hen all cartridges have been inserted, close the cover.

Printhead Information, Replacement and Alignment

Obtaining Printhead Information

croll to the Ink Menu icon and press OK.

1 S

2 In the

3 In the

Ink Menu submenu, scroll to Printhead information and press

OK.

Printhead Information submenu, scroll to the Printhead that you want

information on and press OK.

he front panel displays information on the selected Printhead.

4 T

The information supplied is:

HP Designjet T Series — Service Manual 1-45

Page 50

Ink Supplies Troubleshooting

 The make of the printhead (hp no.72 is recommended).  The product number of the Printhead.  The serial number of the Printhead.  The current status of the printhead.  How much ink has been fired (consumed) by the printhead. Note: It is

possible for a printhead to consume more than one Ink Cartridge.

 The current warranty status of the Printhead.

Changing a Printhead

croll to the Ink Menu icon and press OK.

1 S

2 In the

3 T

4 W

5 Op

6 L

Ink Menu submenu, scroll to Replace printheads and press OK.

he printer moves the Carriage to the correct position to replace Printheads.

If the carriage is left in the removal position for more than three minutes w

ithout inserting or removing any printheads, it will try to move back to its

normal position at the right-hand end.

hen the carriage has stopped moving, the front panel display will prompt

you to open the window and lift the carriage cover.

en the window.

ift the Carriage cover to access the printheads.

ift the blue handle and pull the Printhead straight up out of the Carriage.

7 L

HP Designjet T Series — Service Manual 1-46

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Ink Supplies Troubleshooting

8 T

o insert a new printhead first remove the orange protective caps.

he printhead is designed to prevent you from accidentally inserting it into

9 T

the wrong slot. Check that the colored label on the printhead matches the colored label of the carriage slot into which the printhead is to be inserted. Insert the printhead slowly and vertically, straight down. It may be damaged if you insert it too fast, or at an angle, or if you rotate it as you insert it.

10 Ins

11 Cl

12 W

ert all other printheads that need to be installed, and close the carriage

cover.

ose the Window.

hen all the printheads have been inserted correctly and accepted by the

printer, the printer will beep. If the printer does not beep when you insert the printhead and the Replace message appears on the front panel display, the printhead may need to be reinserted. The front panel display confirms that all printheads are correctly inserted.

he printer will start checking and preparing the printheads. The default

HP Designjet T Series — Service Manual 1-47

Page 52

Ink Supplies Troubleshooting

routine process, when all printheads are changed, takes 25 minutes. If the pr

inter finds problems in preparing the printheads, it will take longer, up to 55 minutes. For a single printhead insertion, the times vary between 15 and 35 minutes. After all printheads are checked and prepared, for the printhead realignment.

Aligning Printheads

Precise alignment between printheads is essential for accurate colors, smooth color printer has an automatic printhead alignment process which runs whenever a printhead has been accessed or replaced.

In cases where the paper has jammed, you have used a custom paper, or

e experiencing problems with color accuracy you may need to align the

ar printheads. If the paper has jammed, it is recommended that you reinsert the printheads and initiate the realignment procedure with the Image Quality Maintenance menu.

Do not use transparent and semi-transp Photo paper is recommended for the best quality.

Reinsert Printheads Procedure

the realignment process is running and the wrong paper is loaded, press

1 If

the cancel key on the front panel. Do not print if the realignment process has been canceled. You can restart the alignment with the Image Quality Maintenance menu procedure.

oad the paper you wish to use,. You can use a roll or cut sheet, however, it

2 L

must be A3 landscape or larger.

emove and re-insert all the printheads, see Remove a printhead and Insert

3 R

a printhead. This will start the printhead alignment procedure.

transitions, and sharp edges in graphical elements. Your

arent paper to align the printheads.

4 Ensur

5 T

1 L

2 Pr

3 S

4 If

e the transparent window closed, as a strong light source near the

printer during printhead realignment can affect alignment.

he process will take about six minutes. Wait until the front panel display

shows the process complete before using the printer.

Image Quality Maintenance Procedure

oad the paper you wish to use. You can use a roll or cut sheet, however, it must be A3 landscape or larger (420 by 297 mm). Do not use transparent and semi-transparent paper to align the printheads. Photo paper is recommended for the best results; plain, bond and thin coated papers provide acceptable but marginal results.

ess the Menu key to return to the main menu and select the Image Quality

Maintenance menu icon.

elect Align printheads. The printer will check to see if it has enough paper

to run the realignment.

the loaded paper is satisfactory, the printer will run the realignment and print a realignment pattern. Ensure the transparent window is closed, as a strong light source near the printer during printhead realignment can affect alignment.

HP Designjet T Series — Service Manual 1-48

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Ink Supplies Troubleshooting

Plot:

he process will take about five minutes. Wait until the front panel display

5 T

shows the process complete before using the printer.

Scanning errors during alignment

If the alignment process FAILs, a Scanning problems message appears on

ront panel. This means that the alignment has not completed

the f successfully. Therefore the printer is not aligned and the alignment should be repeated before printing with good image quality. The problem may be due to:

 The paper used was not valid, repeat the alignment with valid paper.  Printhead health problems, clean printheads.  The alignment was done with the transparent window open, repeat the

alignment with the window closed.

If the problem persists after using valid pa keeping the window closed, there may be a Failure in the scanning system needing reparation or the printheads, although clean, may not work and need to be replaced.

per, cleaning the printheads, and

Ink Cartridge and Printhead Status Messages

Ink Cartridge Status Messages

OK The Ink Cartridge is operating correctly and no action is required.

Missing There is no Ink Cartridge present, or it is not properly connected to the

inter

Low The Lo

Very Low When the Ve

Empty The printer will stop and will not be able to continue printing until a new Ink

HP Designjet T Series — Service Manual 1-49

w message is an early warning sign and it is advisable that new

supplies should be obtained of that particular color. The amount of ink remaining in the Ink Cartridge depends on it’s capacity, but there is approximately 14% of ink available for the user.

ry Low message is displayed, overnight printing should not

be attempted. Changing the Ink Cartridge is strongly recommended to prevent the printer from stopping halfway through a print. There is approximately 8% of ink available for the user.

artridge has been installed. If this occurs halfway through printing an

Page 54

Ink Supplies Troubleshooting

image, you should check the quality of this image, as stopping mid-plot can aff

ect the print. It would be recommended to reprint the image once a new

Ink Cartridge has been installed.

Reseat You are recommended to remove the Ink Cartridge and then reinsert it.

Replace You are recommended to replace the Ink Cartridge with a new Ink

rtridge.

Altered There is something unexpected about the Ink Cartridge's status.

Expired The Ink Cartridge has passed the expiration date.

Printhead status messages

OK The Printhead is operating correctly and no action is required.

Missing There is no Printhead present, or it is not properly connected to the printer.

Test printhead sep

arately

Reseat You are recommended to start the printhead removal process from the front

Replace You are recommended to remove the printhead and then reinsert it; if that

Replacement

complete

Remove The printhead is not a suitable type for use in printing (for instance, a setup

You are recommended to test the printheads individually to find the failing printhead. Remove all the printheads and insert them alone one by one, Closing the latch and the carriage cover after every insertion. The front panel display will indicate the failing one showing the reseat or replace message.

, but instead of removing the printhead, simply press the OK key on the

panel front panel.

ails, clean the electrical connections; if that fails, replace the printhead with

f a new printhead.

A printhead replacement process has not completed successfully, relaunch the replacement process and let it finish completely (it is not needed to change the printheads).

inthead).

Printhead Error Codes

The following table describes the Printhead Error Codes. Refer to the above

scriptions of the status messages for the appropriate action.

Error Code

0 Working OK The printhead is

1 Fails

HP Designjet T Series — Service Manual 1-50

Status Name

gical V

Status

Message

Replace The printhead may

Description Comments

rking properly

have a vcc short

Page 55

Ink Supplies Troubleshooting

Error Code

2 Fails

4 Shutdown Not used 8 Fails Vpp Replace Suspected vpp ink

16 Temp

32 Temp

64 Temp too

12 8 Temp too

256 Bad

512 No Pen Missing There is no

1024 Bad

2048 Wrong

4096 Mismatch Replace Wrong color

819 2 CSdata Not

16 38 4 CSdata

Status Name

ntinuity

Extr

emely

High

Extr

emely

Low

Hig

Low

umen

Info

cumen

Access

sponding

ansmit Error

del

Status

Message

Reseat Could be caused

Replace Printhead

Reseat Printhead

Replace Printhead

Reseat Printhead

Replace Critical acumen

Reseat or

Test

Separately

Replace Wrong printhead

Reseat CSdata

Description Comments

ort

temperature above

normal margins

temperature below

normal margins

temperature above

normal margins

emperature below

normal margins

info outside

margins

inthead

Acumen cannot be

accessed

inserted

erted

ins

commuication

failed

commuication

incorrect

by bad insertion.

Better to reseat

the PEN than to

reject it.

Could be caused

by a short in the

ink supplies

Could be caused

by bad Vpp

continuity

Could be caused

by a short in the

ink supplies

Could be caused

by bad Vpp

continuity

Printhead has a

manufacturing

problem

Bad acumen

continuity or a

short; Cannot

identify problem

printhead

Mechanical

lockouts should

prevent this. Error

is redundant.

Mechanical

lockouts should

prevent this

Could be caused

by bad insertion

Could be caused

by bad contact

HP Designjet T Series — Service Manual 1-51

Page 56

Troubleshooting

Error Code

32768 Fails Energy

65536 Empty

131072 Full Dummy Remove Requested during

262144 End of Life Warning Printhead

524288 Expired Warning Printhead has

Status Name

libration

Dumm

Solving Ink Supplies Problems

Most of the problems that you could encounter when working with the ink supplies are solved with guidance from the front panel. A full list of front panel messages are supplied in the User’s Guide.

You Cannot Insert the Ink Cartridge Into the Printer

1 Ensu

2 Ensu

re that you have the correct hp no.72 Ink Cartridge.

re that the Ink Cartridge is the correct color for that slot.

Status

Message

Reseat Energy calibration

OK during

Purge

Description Comments

failed

rranty expired

use

d expired or

non-HP ink

Could be caused

by bad contact

Requested during

purge, otherwise

should be

removed

pur

3 Ensu

1 Ensu

2 Ensu

3 Ensu

4 Ensu

1 F

2 C

3 R

4 C

re that the Ink Cartridge is the correct orientation, with the color coded

label at the top.

Never clean inside the Ink Cartridge slots as this can cause damage to the Pr

inter.

You Cannot Insert the Printhead Into the Printer

re that you have the correct hp no.72 Printhead.

re that the printhead is the correct color for that slot.

re that the printhead is in the correct orientation.

re that the protective cap is removed from the Printhead.

The front panel says to reset or replace a printhead

rom the front panel, turn the power off then on.

heck the front panel display message, if it shows the ready message, the

printer is ready to print. If the problem remains continue with the next step.

emove the printhead.

lean the electrical connections on the backside of the printhead with a lint free cloth. You can carefully use a mild rubbing alcohol if moisture is needed to remove residue. Do not use water. You can use the Flex Contacts Cleaning Tool.

1-52 HP Designjet T Series — Service Manual

Page 57

Ink Supplies Troubleshooting

This is a delicate process and may damage the printhead. Do not touch the nozzl

es on the bottom side of the printhead, especially not with any alcohol.

einsert the printhead.

5 R

heck the front panel display message. If the problem remains, try a new

6 C

printhead.

Maintaining and Cleaning the Printheads

Clean the printheads

As long as the printer is kept turned on, an automatic cleaning is performed per

iodically. This ensures there is fresh ink in the nozzles and prevents

nozzle clogs, which ensures color accuracy. If you have not already done so, please refer to Horizontal lines across the

ima

ge (banding) and The Image Diagnostics Print before proceeding.

To clean the printheads, press the Menu key to return to the main menu and s

elect the Image Quality Maintenance menu icon, then Clean printheads. If you have gone through the Image Quality Diagnostic print process, you know which colors are failing. Select to the pair of printheads which contain the failing colors. If you are not sure which colors to clean, you can also select to clean all printheads.

Cleaning all printheads takes about nine minutes. Cleaning a single pair of

intheads takes about six minutes. Cleaning all printheads uses more ink

pr than cleaning a single pair.

If you have cleaned the printheads u from the front panel and are still experiencing image quality problems, you can try cleaning the printhead nozzles manually using the following procedure.

This is a delicate process and may damage the printhead. Do not touch the

ectrical connections on the backside of the printhead.

sing the Clean printheads procedure

HP Designjet T Series — Service Manual 1-53

Page 58

Troubleshooting

You must remove the printhead (see and using a cotton swab and a little de-ionized, distilled water, or Carriage

terconnect Wiper clean the bottom of the printhead until the residue is

In removed.

Flex Contacts Cleaning Tool

The Flex Contacts Cleaning Tool is part of the Maintenance Tool Kit which can be or needed to use the Flex Contacts Cleaning Tool will be packaged with the kit.

Whenever you replace the Printhead, check the empty slots to see if they ne

ed cleaning. In extreme circumstances, when a Printhead is inserted, it is possible that the Printer will not recognize it due to the build-up of ink on the electrical connection between the Printhead and the Carriage Assembly.

Included with the printer is a Flex Contacts Cleaning Tool. This tool is

ovided in a separate package. It also contains replacement sponges and

pr an instruction sheet. This tool should be used for cleaning the electrical interconnects of both the Carriage Assembly and the Printhead.

dered using Part Number Q5669-60690. All the instructions

Changing a Printhead on page 1-46)

If the front panel displays the message “Reseat” or “Replace” next to the

ffending printhead, try cleaning the flex circuits of the Carriage and the

o Printheads using the Carriage Interconnect Wiper.

1-54 HP Designjet T Series — Service Manual

Page 59

Ink Supplies Troubleshooting

Do not touch, wipe or attempt to clean the printhead nozzles. This can damag

e the printhead and reduce print quality.

HP Designjet T Series — Service Manual 1-55

Page 60

Troubleshooting

1-56 HP Designjet T Series — Service Manual

Page 61

System Error Codes 1

Introduction 2-2 Printer logs 2-3 Replacing the PrintMech PCA, Media Advance Encoder PCA and Formatter 2-4

IMPORTANT: Three rules for replacing these three service parts 2-4

IMPORTANT: Three rules for replacing these three service parts 2-4 What to do if the Front Panel is blank 2-5 Continuable and Non-Continuable Error Codes 2-6 System Error Code Brief Descriptions 2-7 System Error Codes - Full Descriptions 2-10 Appendix A: How to troubleshoot SE 79:04 2-35

Possible causes 2-35

Job related SE79:04 2-35 Data related SE79:04 2-36 Network related SE79:04 2-38 User Interaction related SE79:04 2-39 Random SE79:04: Concurrence issues and memory leaks 2-39 Hardware related SE79:04 2-41 Job related SE79:04 2-35

Troubleshooting based on symptoms 2-42

Front panel displays 79:04 at Start-up 2-42 Front panel displays 79:04 during printer operation – not while sending jobs 2-43

Front panel displays 79:04 while printing 2-44 Appendix B: Updating firmware in diagnostics boot mode 2-47 Appendix C: Obtaining printer logs 2-48

HP Designjet T Series — Service Manual 2-1

Page 62

Introduction

Understand System Error Codes

System error codes are hexa-decimal based numbers generally caused by internal system errors. The following pages contain a list of system error codes and their respective descriptions and recommended corrective actions. Only try one recommended action at a time and check if the error code has disappeared.

If you have an error code which is not documented in this Service Manual or

ou have an error which you cannot resolve, then report the error to the HP

y Response Center or the nearest HP Support Office. When reporting the error, have the following information ready:

 Model and Serial Number of the printer.  Which firmware revision the printer is using (See Note below). Check

firmware in Setup Menu / Information Menu / Show Printer Information.

 The complete error number (See Note below).  The Service Configuration Print. 

The Current configuration sheet.

 Which software application the customer is using (name, version, etc.).

When reporting the System Error Code, make sure that you supply the full Inter

nal Error Code and the firmware version. Without this information, HP Support Personnel cannot help you. To view the Internal Error Code, hold the UP key and press the CANCEL key at the same when the System Error.

When you reporting the system error code, get the printer logs to further

erstand the system error code. To get the printer logs, see

und

Obtaining printer logs on page 2-48.

Code is displayed on the Front Panel.

Introduction

Appendix C:

This is the code definition required when escalating a problem.

HP Designjet T Series — Service Manual 2-2

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System Error Codes

Printer logs

It is possible to have the printer log all the activities it performs in a log file. To further understand a system error code, it is useful to have a log showing the activities of the printer at the time when the system error occurred.

To get printer logs, see

Appendix C: Obtaining printer logs on page 2-48.

2-3 HP Designjet T Series — Service Manual

Page 64

Replacing the PrintMech PCA, Media Advance Encoder PCA and Formatter

IMPORTANT: Three rules for replacing these three service parts

 Never install a previously used PrintMech PCA (T1100/T1100ps/T610) or

Media Advance Encoder PCA (T1120/T1120ps/T620) into another printer.

 Never install a previously used Formatter/Hard Disk Drive in any T Series

printer.

 You must never replace both the Formatter/Hard Disk Drive and the

PrintMech PCA (T1100/T1100ps/T610) or Media Advance Encoder PCA (T1120/T1120ps/T620) at the same time. If both parts need to be replaced, you must first replace one part and then power on the printer until it completely initializes. Then you can power off the printer and replace the other part.

HP Designjet T Series — Service Manual 2-4

Page 65

System Error Codes

What to do if the Front Panel is blank

If the Front Panel is blank, refer to the system error code 08:YZ instructions that apply to the printer model affected. See

ONLY) on page 2-12 or 08:YZ (T1120/T1120ps/T620 ONLY) on page 2-13.

0 8 : Y Z ( T 11 0 0 / T 110 0 p s / T 6 1 0

2-5 HP Designjet T Series — Service Manual

Page 66

Continuable and Non-Continuable Error Codes

Some of the Error Codes are continuable, which means you can press OK on the front-panel and continue working with the Printer. Non-Continuable Error Codes do not allow you to continue working with the Printer, in this case power the Printer OFF and ON again and see if the System Error disappears. If the Error Code reappears, then the Printer requires an on-site visit in order to resolve the problem.

Even though the customer can continue working with a Continuable Error

e, an on-site visit should still be planned to troubleshoot the problem.

Cod

HP Designjet T Series — Service Manual 2-6

Page 67

System Error Codes

System Error Code Brief Descriptions

Reading a System Error Code

System Error Codes explain which component/system is failing and what action should be taken to resolve the problem.

System Error Codes are displayed directly on the front panel (but can also be s

een on the Information Page) and have been defined in the format XX.YZ.

or XX.n:YZ.m.

 XX: Can be a malfunctioning subsystem or process (2 digits).  n: Subsystem or process Index (if more than one used in the product) -

Optional. – e.g. Identify the Ink Supply (color and number).

 Y: Who should perform the action (1 digit) - (0 for User or1 for Service

Engineer).

 Z: Action to perform (1 digit).

System Error Code Table

The following table explains the XX part of the System Error Code or Warning:

Code Component/System

01.0 Main PCA/Electronics module

01.1 Add-on Electronics module (printmech)

01.2 Print Mech PCA

02.1 Carriage PCA 03 Power supply 06 Formatter 08 Formatter/Front panel

11 Trailing cable

21 Service station

21.1 Service station

22.0 Bongo error BPS0 (ISS Left)

22.1 Bongo error BPS1 (ISSLeft) 24 Tube assembly (IDS)

26.n Ink Cartridge (color = n) 27 Printhead error

31 Cutter

38 Output Tray

41 Paper-axis motor

41.1 Paper-axis motor

2-7 HP Designjet T Series — Service Manual

Page 68

System Error Code Brief Descriptions

Code Component/System

42 Scan-axis motor 44 Aerosol fan 45 Rewinder 47 Star wheel motor 48 PPS mechanism

51 Window Sensor 52 Drop detector 55 Line sensor 56 Drive roller analog encoder sensor

61 Error job 62 PC Interface 63 Input/output through LAN card 64 Input/output through USB port 65 Input/output (not known what port) 66 Input/output (not known what port) 67 Input/output through FireWire port 68 Loss of engine counters tracking 71 Memory management

71.19 PrintMech PCA/Formatter 72 Firmware error 73 Servo 74 Firmware upgrade

74 .1 Media Profile Update

75.1 Preventive Maintenance kit #1

75.2 Preventive Maintenance kit #2

75.3 Preventive Maintenance kit #3 76 Disk Full 77 Web access application 78 Borderless

78.1 Media Settings 79 Assertion (uncontrolled FW error)

79.1 Recoverable Firmware Error

81 Media advance

81.1 Media advance 84 Roll Feed 85 Media-axis encoder reading 86 Paper path 87

Scan axis

HP Designjet T Series — Service Manual 2-8

Page 69

System Error Codes

Code Component/System

93 Ink Pumping 94 Color calibration

94.1 Profiler 95 Printhead alignment 97 Paper advance calibration

Corrective Actions Table

The following table explains the YZ part of the System Error Code or Warning:

Code Recovery Action Response

00 Replace

01 Reseat/Reconnect/Clean/Adjust (manually)

02 Calibrate/Adjust (using Automatic Process)

03 Power OFF and Restart the Printer

04 Upgrade System Firmware

05 Upgrade Driver or Computer Software

06 Add Accessory

07 Escalate

08 Send Plot Again

09 Wrong Part Installed

10 Replace

11 Reseat/Reconnect/Clean/Adjust (manually)

12 Calibrate/Adjust (using Automatic Process)

13 Power OFF

14 Upgrade System Firmware

15 Upgrade Driver or Computer Software

Possible for

stomer to

perform

action

hp qualified

per

sonnel

assistance

required

16 Add Accessory

17 Escalate

18 Send Plot Again

19 Wrong Part Installed

2-9 HP Designjet T Series — Service Manual

Page 70

System Error Codes - Full Descriptions

This sections describes each of the system error codes and warnings that could be encountered while using the printer and provides the remedial action required to solve the problem detected.

Only replace one component at a time and check if the error has gone bef

ore replacing another component. Using this procedure you will be able

to determine exactly which component failed.

System Error:

Problem Description:

Corrective Action: Try the following:

01.0:YZ

Communication with Main PCA failed.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

emove the formatter and reinsert it again. Ensure that it connects properly

2 R

in the Main PCA connector.

 If the System Error continues, replace the Main PCA. See Electronics

Module Main PCA and PSU (T1100/T1100ps/T610) on page 6-206 or Electronics Module Main PCA & PSU (T1120/T112 0 p s /T 62 0 ) on page 6-

209.

 If the System Error continues, replace the Formatter. See Formatter on

page 6-204.

System Error:

Problem Description:

Corrective Action: Try the following:

0 1.1 : Y Z ( T 110 0 / T 110 0 p s / T 61 0 O N L Y )

Error in the Print Mech PCA.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

f the System Error continues, replace the Main PCA. See Electronics Module

2 I

Main PCA and PSU (T1100/T1100ps/T610) on page 6-206 or Electronics Module Main PCA & PSU (T1120/T1120ps/T620) on page 6-209.

the System Error continues, replace the Formatter. See Formatter on page

3 If

6-204.

System Error:

Problem Description:

Corrective Action: Try the following:

HP Designjet T Series — Service Manual 2-10

01.2:YZ

Failure reading acumen chip of an Ink Supply Station.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that there are not two cartridges of the same color installed.

2 C

erform the Ink Delivery System diagnostic test. See 7. I n k D e l i v e r y S y s t e m

3 P

(IDS) on page 3-35.

Page 71

System Error Codes

– If the test finds that the ink supply is defective, replace it. – If the test does not find any errors, remove all the ink supplies from the

SS and reboot the printer.

tall the ink cardtriges with the printer booted in normal mode. Use the

4 Ins

replacement option available from the Front Panel and install the cartridges one by one. If an error appears after installing a supply, the last supply you installed is defective. Replace it.

f the System Error continues, replace the Main PCA. See Electronics Module

5 I

Main PCA and PSU (T1100/T1100ps/T610) on page 6-206 or Electronics Module Main PCA & PSU (T1120/T1120ps/T620) on page 6-209.

the System Error continues, replace the Left Ink Supply Station. See Left Ink

6 If

Supply Station on page 6-187.

System Error:

Problem Description:

Corrective Action: Try the following:

02.1:YZ

Problem with the Carriage PCA.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the Trailing Cable is not damaged.

2 C

heck that the Trailing Cable is correctly connected between the Main PCA

3 C

and Carriage PCA.

the System Error continues, replace the Trailing Cable and Carriage PCA

4 If

Covers. See

Trailing Cable (T1120/T1120ps/T620) on page 6-109.

the System Error continues, replace the Carriage PCA. See Carriage PCA

5 If

(T1100/T1100ps/T610) on page 6-177 or C a r r i a g e P C A ( T 112 0 / T 11 2 0 p s / T620) on page 6-182.

f the System Error continues, replace the Main PCA. See Electronics Module

6 I

Main PCA and PSU (T1100/T1100ps/T610) on page 6-206 or Electronics Module Main PCA & PSU (T1120/T1120ps/T620) on page 6-209.

eplace the Carriage Assembly. See Carriage Assembly (T1100/T1100ps/

7 R

T610) on page 6-116 or Carriage Assembly (T1120/T112 0 p s / T 62 0 ) on page 6-127.

Trailing Cable (T1100/T1100ps/T610) on page 6-102 or

System Error:

Problem Description:

Corrective Action: Try the following:

2-11 HP Designjet T Series — Service Manual

03:YZ

Problem with Power Supply Unit.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

erform the Electronics Module Test Diagnostic to troubleshoot the problem

2 P

further. See

the System Error continues, replace the Power Supply Unit (PSU). See

3 If

Electronics Module Main PCA and PSU (T1100/T1100ps/T610) on page 6-

3. Electronics Module on page 3-21.

Page 72

System Error Codes - Full Descriptions

206 or Electronics Module Main PCA & PSU (T1120/T1120ps/T620) on page 6-209.

System Error:

Problem Description:

Corrective Action: Replace the battery:

System Error:

Problem Description:

Corrective Action: Try the following:

03.0:10

Battery of Real Time Clock ran down.

urn the printer off and unplug the cable. Unplug any network or USB

1 T

cables.

oosen the screws that attach the formatter to the printer with your fingers, or

2 L

with the help of a flat screwdriver, and remove the formatter.

ocate the round, flat battery in the formatter.

3 L

ush the battery slightly to one side and then pull it up. A little force may be

4 P

required.

ert the new battery by pressing it down.

5 Ins

ert the formatter into the printer by pressing it down, and tighten the

6 Ins

screws.

econnect the cables and turn the printer on.

7 R

06:YZ

Failure reading/writing NVM in Hard disk.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

the System Error continues, replace the Formatter. See Formatter on page

2 If

6-204.

System Error:

Problem Description:

Corrective Action: Try the following:

08:YZ (T1100/T1100ps/T610 ONLY)

No comunication between the Front Panel and the Main PCA.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the Front Panel interface cable is not damaged and is correctly

2 C

connected between the Main PCA and the Front Panel.

heck that the connections between the Formatter and the Main PCA are

3 C

not damaged and are correctly connected.

the System Error continues, replace the Formatter. See Formatter on page

4 If

6-204.

the System Error continues, replace the Main PCA. See Starwheel

5 If

Assembly on page 6-214.

HP Designjet T Series — Service Manual 2-12

Page 73

System Error Codes

6 If

the System Error continues, replace the Front Panel. See Front Panel on

page 6-47.

System Error:

Corrective Action: The LEDs of the formatter (visible through the cover) and the power supply

08:YZ (T1120/T1120ps/T620 ONLY)

can help you troubleshoot a problem when the Front Panel is blank. The following image shows the Power Supply LED, looking through the cover.

The following image shows the Formatter LEDs, which should be marked 1, 2

, and 3.

Use the following table to interpret the LEDs and find the source of the p

roblem. Remember that you should read these LEDs when you push the

Power button. Some combinations may require the replacement of two or more

compone printer to see if the problem has disappeared (check the LEDs again). If the same LED sequence continues, replace the next component indicated in the

table.

Power supply LED

Off Off Off Off Off

On Off Off Off Off

2-13 HP Designjet T Series — Service Manual

Formatter 1 LED

nts. In this case, always replace one component at a time. Test the

Formatter 2 LED

Formatter 3 LED

Front-panel status

Part to change

Power supply. Page

Main PCA. Page 6-209

6-209

Page 74

System Error Codes - Full Descriptions

On On Off Off

On On

On On On Off

On On On

On On On On

On On On On Off

System Error:

*Flashing*

11 : Y Z

Off Off

*Flashing*

Off

*Flashing*

n/a Formatter. Page

n/a

n/a Main PCA. Page 6-209

Front-panel

ght on

Hard Disk Drive.

6-204

Page Hard Disk Drive.

6-204

Page

1. Fo r m a t t e r. P a g e

2. Main PCA. Page 6-209

First check the front panel.

6-47

Page If necessary, check the Main PCA. Page Then check the front-panel cable. Page

Check the front-panel ca

ble connection. If necessary, replace the front-panel cable. Page

6-47

6-204

6-209

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

Trailing Cable does not seem to be detected.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the Trailing Cable is not damaged.

2 C

heck that the Trailing Cable is correctly connected betwen the Main PCA

3 C

and Carriage PCA and make sure that the connectors in these boards are not damaged.

the System Error continues, replace the Trailing Cable. See Trailing Cable

4 If

(T1100/T1100ps/T610) on page 6-102 or T r a i l i n g C a b l e ( T 112 0 / T 112 0 p s / T620) on page 6-109.

the System Error continues, replace the Main PCA. See Starwheel

5 If

Assembly on page 6-214.

the System Error continues, replace the Carriage PCA. See Carriage PCA

6 If

(T1100/T1100ps/T610) on page 6-177 or C a r r i a g e P C A ( T 112 0 / T 11 2 0 p s / T620) on page 6-182.

21:YZ

Fail moving Service Station.

Corrective Action: Try the following:

HP Designjet T Series — Service Manual 2-14

Page 75

System Error Codes

1 S

witch the Power OFF from the back of the Printer and disconnect the Power cord. Check the Primer Tubes. Reconnect the power cord and power On the Printer.

2 Mak

3 P

4 If the S

5 If

e sure that the Service Station path is clear. Remove any visible obstacles (e.g. screws, plastic parts, etc...) restricting the movement of the Service Station.

erform the Service Station diagnostic test to troubleshoot the problem

further. See

(T1100/T1100ps/T610) on page 6-61 or Service Station (T1120/T1120ps/ T620) on page 6-65.

the System Error continues, replace the PrintMech PCA. See PrintMech

PCA (T1100, T1100 ps, T 610 O N LY) on page 6-73.

8. Service Station on page 3-41.

ystem Error continues, replace the Service Station. See Service Station

System Error:

Problem Description:

Corrective Action: Try the following:

Warning:

Problem Description:

21.1:YZ

Fail moving the Primer Motor of the Service Station.

emove the Right Cover and make sure the cables from the Printmech PCA to

1 R

the Service Station are connected and are not damaged (T1100/T1100ps/ T610 ONLY).

erform the Service Station diagnostic test to troubleshoot the problem

2 P

further. See

3 If the S

(T1100/T1100ps/T610) on page 6-61 or Service Station (T1120/T1120ps/ T620) on page 6-65.

the System Error continues, replace the PrintMech PCA. See PrintMech

4 If

PCA (T1100, T1100 ps, T 610 O N LY) on page 6-73.

8. Service Station on page 3-41.

ystem Error continues, replace the Service Station. See Service Station

2x.n:10

Ink supply error found during IDS diagnostic test. The n represents the ink supply that is failing. The ink supply furthest to the left is always 0, and then they count up from left to right.

01 2 3 4 5

Left Ink Supplies

Corrective Action: Try the following:

 Replace the Left Ink Supply Station. See Left Ink Supply Station on page 6-

187 .

2-15 HP Designjet T Series — Service Manual

Page 76

System Error Codes - Full Descriptions

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

Corrective Action: Try the following:

22.0:YZ

Left Ink Supply Station error.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the cables between the Left Ink Supply Station and Main PCA the

2 C

are not damaged and are correctly connected.

erform the Ink Delivery System diagnostic test to troubleshoot the problem

3 P

further. See

the System Error continues, replace the Left Ink Supply Station. See Left Ink

4 If

Supply Station on page 6-187.

f the System Error continues, replace the Main PCA. See Electronics Module

5 I

Main PCA and PSU (T1100/T1100ps/T610) on page 6-206 or Electronics Module Main PCA & PSU (T1120/T1120ps/T620) on page 6-209.

7. I n k D e l i v e r y S y st e m ( I D S ) on page 3-35.

22.1:YZ

Left Ink Supply Station error.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the cables between the Left Ink Supply Station and Main PCA the

2 C

are not damaged and are correctly connected.

erform the Ink Delivery System diagnostic test to troubleshoot the problem

3 P

further. See

the System Error continues, replace the Left Ink Supply Station. See Left Ink

4 If

Supply Station on page 6-187.

the System Error continues, replace the Main PCA. See Starwheel

5 If

Assembly on page 6-214.

System Error:

Problem Description:

Corrective Action: Try the following:

24:YZ

Ink Setup failure (you must bring purgers).

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Insert the new purgers, reconnect the power cord and power On the Printer.

erform the Ink Delivery System diagnostic test in order to check that the

2 P

bongos (pushers) go up and down to pressurize ink in the tubes and the Out of Ink sensors work properly. See

7. I n k D e l i v e r y S y st e m ( I D S ) on page 3-35.

7. I n k D e l ive r y S ys t e m ( I D S ) on page 3-35.

ry purging the Ink Supply Tubes again once the Printer has been restarted.

3 T

HP Designjet T Series — Service Manual 2-16

Page 77

System Error Codes

4 If

the diagnostic test does not find any problem, install new cartridges in the printer and try purging the Ink Supply Tubes again. It could be that one of the cartridges is defective.

the problem persists, replace the Ink Supply Tubes. See Ink Supply Tubes

5 If

(T1100/T1100ps/T610) on page 6-191 or Ink Supply Tubes (T1120/T1120ps/ T620) on page 6-197.

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

31:02

An error has been detected with the cutter.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck the Cutter Assembly for blockage or any other obvious problems.

2 C

eplace the Cutter Assembly. See Cutter Assembly on page 6-42.

3 R

31:03

Paper is loaded. While testing the cutter, paper should not be loaded.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord.

nload the media.

2 U

econnect the power cord and power On the Printer.

3 R

41:03

Media-Axis Motor failure (likely due to friction or obstacles in the media path).

Corrective Action: Try the following:

 Same as 41:YZ but after testing the issue is repeatable.

System Error:

Problem Description:

Corrective Action: Try the following:

2-17 HP Designjet T Series — Service Manual

41:YZ

Electrical fault or current limit in Media-Axis Motor.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

pen the Window and check for any visible obstacles restricting the

2 O

movement of the Media Advance Roller. If there is a wrinkled mass of media inside the paper path, lift the Pinch wheels (using Media Lever) and clear the obstruction.

erform the Paper Drive diagnostic test to troubleshoot the problem furthe.

3 P

2. Paper Drive on page 3-18.

See

Page 78

System Error Codes - Full Descriptions

4 If

the printer has a 44 inch scan axis (and a Rewinder), perform the Rewinder diagnostic test to troubleshoot the problem further. See

Rewinder on page 3-34.

heck that the Media Advance Drive cable is not damaged and is correctly

5 C

connected to the Main PCA.

eplace the Media Advance Drive. See Media Advance Drive on page 6-

6 R

224.

the System Error continues, replace the Main PCA. See Starwheel

7 If

Assembly on page 6-214.

System Error:

Problem Description:

Corrective Action: Try the following:

41.1:Y Z

Electrical fault or current limit in Media-Axis Motor.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

pen the Window and check for any visible obstacles restricting the

2 O

movement of the Media Advance Roller. If there is a wrinkled mass of media inside the paper path, lift the Pinch wheels (using Media Lever) and clear the obstruction.

erform the Paper Drive diagnostic test to troubleshoot the problem furthe.

3 P

2. Paper Drive on page 3-18.

See

the printer has a 44 inch scan axis (and a Rewinder), perform the

4 If

Rewinder diagnostic test to troubleshoot the problem further. See

Rewinder on page 3-34.

heck that the Media Advance Drive cable is not damaged and is correctly

5 C

connected to the Main PCA.

eplace the Media Advance Drive. See Media Advance Drive on page 6-

6 R

224.

the System Error continues, replace the Main PCA. See Starwheel

7 If

Assembly on page 6-214.

System Error:

Problem Description:

Corrective Action: Try the following:

42:03

Scan-Axis Motor failure (likely due to obstacles in the scan axis or electrical fault).

 Same as 42:YZ but after testing the issue is repeatable.

System Error:

Problem Description:

Corrective Action: Try the following:

HP Designjet T Series — Service Manual 2-18

42:YZ

Scan-Axis Motor failure (likely due to friction or obstacles in the media path).

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

Page 79

System Error Codes

2 O

pen the Window and check for any visible obstacles restricting the movement of the Media Advance Roller. If there is a wrinkled mass of media inside the paper path, lift the Pinch wheels (using Media Lever) and clear the obstruction.

erform the Scan Axis diagnostic test to troubleshoot the problem further. See

3 P

1. S c a n A x i s on page 3-6.

heck that there is no obstacle preventing the Service Station from working.

4 C

erform the Service Station diagnostic test to troubleshoot the problem

5 P

further. See

heck that the Scan-Axis Motor cable is not damaged and is correctly

6 C

connected to the PrintMech PCA.

eplace the Scan-Axis Motor. See S c a n - A x i s M o t o r ( T 110 0 / T 11 0 0 p s / T 61 0 )

7 R

on page 6-142 or S c a n - A x i s M o t o r ( T 112 0 / T 112 0 p s / T 6 2 0 ) on page 6-146.

the System Error continues, replace the PrintMech PCA. See PrintMech

8 If

PCA (T1100, T1100 ps, T 610 O N LY) on page 6-73.

8. Service Station on page 3-41.

System Error:

Problem Description:

Corrective Action: Try the following:

44:YZ (T1100/T1100ps/T610 ONLY)

The 44:10 system error signifies an electrical error with the Aerosol Fan, or a connection error.

Please note that only T1100/T1100ps/T610 printers manufactured before mi

d-February, 2008, have aerosol fans.

d you replace the Formatter before the error occurred? Is the printer a

1 Di

T1100/T1100ps/T610? If so, see If the error occurred after replacing the Formatter below.

witch the Power OFF from the back of the Printer and disconnect the Power

2 S

cord. Reconnect the power cord and power On the Printer.

heck that the Aerosol Fan cable is not damaged and is correctly connected

3 C

to the PrintMech PCA

eplace the Aerosol Fan Assembly. See Aerosol Fan Assembly (T1100,

4 R

T1100ps, T610 ONLY) on page 6-71.

If the error occurred after replacing the formatter

As a design enhancement from mid February, 2008, the HP Designjet T S

eries printers do not include an Aerosol Fan.

A small quantity of printers manufactured after mid February, 2008, are d

isplaying the system error 44:10 if the formatter has been replaced, because the formatter contains a previous firmware version (previous to version 6) that checks for a fan connection.

Corrective Action

Check the serial number plate which is located at the rear of the printer. If

printer was built after mid February, 2008, replace the Formatter using

the the following part numbers:

HP Designjet T1100 Printer: Q6683-60021 (or any formatter service kit in

cluding fw 6 or superior)

2-19 HP Designjet T Series — Service Manual

Page 80

System Error Codes - Full Descriptions

HP D es ig nj et T 610 P ri n t er: Q 6711- 60 024 (o r a ny fo rm at t er se rv ic e k i t in

cluding fw 6 or superior)

 If the printer was manufactured before mid-February, 2008 perform the

standard troubleshooting procedure above.

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

45:YZ

An error with the Rewinder System has been detected.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the Rewinder cable is not damaged and is correctly connected to

2 C

the PrintMech PCA.

heck that the Right Spindle Holder (rewinder included) is correctly attached

3 C

to and aligned with the Right Cover.

erform the Rewinder diagnostic test to troubleshoot the problem further. See

4 P

6. Rewinder on page 3-34.

eplace the Right Spindle Holder (rewinder included). See Right Spindle

5 R

Holder and Rewinder (T1120/T1120ps/T620) on page 6-87 or Right Spindle Holder and Rewinder (T1120/T1120ps/T620) on page 6-87.

the System Error continues, replace the PrintMech PCA. See PrintMech

6 If

PCA (T1100, T1100ps, T610 ONLY) on page 6-73.

47:03

Star wheels motor error.

Corrective Action: Try the following:

 Same as 47:YZ. The error is continuable, but only if it happens from time

to time.

System Error:

Problem Description:

Corrective Action: Try the following:

47:YZ

Star wheels motor error.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the Starwheel Assembly cable is not damaged and is correctly

2 C

connected to Main PCA.

pen the Window and check for any visible obstacles restricting the

3 O

movement of the Starwheel Assembly, then clear the obstruction.

erform the Scan Axis Starwheel diagnostic test to troubleshoot the problem

4 P

further. See

eplace the Starwheel Motor. See Starwheel Motor on page 6-251.

5 R

Star Wheel Lifter test on page 3-7.

HP Designjet T Series — Service Manual 2-20

Page 81

System Error Codes

6 If

the System Error continues, replace the Main PCA. See Starwheel

Assembly on page 6-214.

System Error:

Problem Description:

Corrective Action: Try the following:

48:YZ

PPS system failure.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the Pen to Paper Space (PPS) Solenoid cable is not damaged and

2 C

is correctly connected to the PrintMech PCA.

erform the Scan Axis PRS diagnostic test to troubleshoot the problem further.

3 P

PRS Test on page 3-9.

See

4 Mak

5 R

6 If

e sure the Service Station is correctly installed. Sometimes, if the Service Station is not correctly installed, the front of the Service Station falls down (causing the Service Station to be tilted), and the L-Bracket support does not fit properly. The front of the Service Station should be “UP,” and the L-Bracket should fit well with the Service Station.

eplace the Pen to Paper Space (PPS) Solenoid. See Pen to Paper Space

(PPS) Solenoid (T1100/T1100ps/T610) on page 6-75 or Pen to Paper Space (PPS) Solenoid (T1120/T1120ps/T620) on page 6-77.

the System Error continues, replace the PrintMech PCA. See PrintMech

PCA (T1100, T1100 ps, T 610 O N LY) on page 6-73.

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

Corrective Action: Try the following:

51: YZ

Window Sensor failure.

heck that the Window Position Sensor cable is not damaged and is

1 C

correctly connected to the PrintMech PCA.

erform the Sensors Test to troubleshoot the problem further. See 5. Sensors

2 P

on page 3-31.

eplace the Window Position Sensor. See Window Position Sensor on page

3 R

6-53.

52:10

The printer has detected fibers in the Drop Detector.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the Drop Detector cable is not damaged and is correctly

2 C

connected to the PrintMech PCA.

lean the drop detector.

3 C

2-21 HP Designjet T Series — Service Manual

Page 82

System Error Codes - Full Descriptions

4 C

heck that the Service Station cable is not damaged and is correctly

connected to the PrintMech PCA.

eplace the Drop Detector. See Drop Detector on page 6-69.

5 R

eset the Calibration Flag of the Drop Detector. See Drop Detector

6 R

Calibration on page 4-12.

the System Error continues, replace the PrintMech PCA. See PrintMech

7 If

PCA (T1100, T1100ps, T610 ONLY) on page 6-73.

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

Corrective Action: Try the following:

55:YZ

Problem with the Line Sensor. The printer has detected a failure to access Line Sensor EEPROM).

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

erform the Carriage Test to troubleshoot the problem further. See 4.

2 P

Carriage Assembly on page 3-26

3 Check the Line Sensor connections to the Carriage PCA.

eplace the Line Sensor. See Line Sensor (T1100/T1100ps/T610) on page 6-

4 R

15 6 or Line Sensor (T1120/T1120ps/T620) on page 6-161.

the System Error continues, replace the Carriage PCA. See Carriage PCA

5 If

(T1100/T1100ps/T610) on page 6-177 or C a r r i a g e P C A ( T 112 0 / T 11 2 0 p s / T620) on page 6-182.

56:YZ

Drive roller analog encoder sensor fail or calibration failed.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

erform the Media Path Test to troubleshoot the problem further. See 2. Paper

2 P

Drive on page 3-18.

eplace the Encoder Disk and Encoder Sensor. See Encoder Disk and

3 R

Encoder Sensor on page 6-222.

the System Error continues, replace the Main PCA. See Starwheel

4 If

Assembly on page 6-214.

System Error:

Problem Description:

Corrective Action: Try the following:

HP Designjet T Series — Service Manual 2-22

58:YZ

The Line Sensor of the printer is not functioning correctly. Either the Line Sensor shutter has failed to open, there is a failure to communicate with the Line Sensor, the Line Sensor is not calibrated correctly, or the firmware is not compatible with the Line Sensor.

witch the Power OFF from the back of the Printer and disconnect the power

1 S

cord. Reconnect the power cord and power On the Printer.

Page 83

System Error Codes

2 P

erform the Line Sensor calibration.

heck that the Printer has the latest Firmware version. If not, update the

3 C

Firmware to the latest version.

erform the Carriage Test to troubleshoot the problem further. See 4.

4 P

Carriage Assembly on page 3-26.

the System Error continues, replace the Line Sensor. See Line Sensor

5 If

(T1100/T1100ps/T610) on page 6-156 or Line Sensor (T1120/T1120ps/ T620) on page 6-161.

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

Corrective Action: Try the following:

61:YZ

The file format is incorrect and the Printer cannot process the job.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck the graphic language setting of the Printer (Refer to the User's Guide).

2 C

esend the file to the printer.

3 R

heck that the Printer has the latest Firmware version. If not, update the

4 C

Firmware to the latest version.

he PostScript™ fonts are missing. Upgrading the Firmware will re-install the

5 T

fonts.

he file cannot be printed because it is password protected. Resend the file

6 T

without password protection.

63:YZ

Input/Output problem through the network interface of the Formatter.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the Network cable is correctly connected to the Formatter.

2 C

heck that the Printer has the latest Firmware version. If not, update the

3 C

Firmware to the latest version.

the System Error continues, replace the Formatter. See Formatter on page

4 If

6-204.

System Error:

Problem Description:

Corrective Action: Try the following:

2-23 HP Designjet T Series — Service Manual

64:YZ

Input/Output problem through the USB Port.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the USB cable is correctly connected to the Printer.

2 C

Page 84

System Error Codes - Full Descriptions

3 C

heck that the Printer has the latest Firmware version. If not, update the

Firmware to the latest version.

the System Error continues, replace the Formatter. See Formatter on page

4 If

6-204.

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

Corrective Action: Try the following:

65:YZ

Memory Driver Internal I/O error, I/O Socket Manager Internal I/O error.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the unknown port cable is correctly connected to the Printer.

2 C

heck that the Printer has the latest Firmware version. If not, update the

3 C

Firmware to the latest version.

the System Error continues, replace the Formatter. See Formatter on page

4 If

6-204.

the System Error continues, replace the Main PCA. See Starwheel

5 If

Assembly on page 6-214.

68:YZ

Loss of engine counters tracking.

 Reboot the printer. The printer will continue to function correctly, but the

life counters will not continue counting until you restart the printer.

71:YZ

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

HP Designjet T Series — Service Manual 2-24

Out of memory failure.

 It is recommended that you remove any unnecessary files from the Hard

Disk Drive of the Formatter using the Web Server.

71:04 (T610 printers ONLY)

Out of memory failure. The total RAM memory available in the HP Designjet T610 Printer Series is

28MB. If the amount of memory that the printer needs to process the file is more than 128MB, the printer will display the system error 71:04 System Error (“Out of Memory” message). This quantity of memory for processing the file is know as the ‘Display list memory’:

 The display list memory is the amount of memory that the printer needs to

process a file, this should not be confused with the file size of the print job, which is different. The size of the display list memory depends on several variables such as the resolution, file size and file content.

Page 85

System Error Codes

 The display list is not visible to the user.  There has been a few cases where a print job that had a relatively small

file size has triggered an out of memory message to be displayed. Print jobs like this typically have a large number of objects in them or have complex objects such as raster images with gradients or objects with multiple layers. Any print job that contains these type of images can result in a display list memory greater than 128MB.

Corrective Action: Try the following:

is recommended that you remove any unnecessary files from the Hard Disk

1 It

Drive of the Formatter using the Web Server.

2 It is a

3 De

lso recommended that you upgrade the firmware to the latest version

available at www.hp.com.

crease the print resolution to 300 dpi

If the customer does not accept the print qualit or using Econofast printmode, proceed to the workaround in step 4.

y after reducing the resolution

 The resolution required by the printer to process the file is set by

printmode selected (Best, Normal, Fast). There is a setting available that enables you to decrease the resolution for each printmode to 300 dpi. If this setting is used, the rendering resolution will be reduced, but the output (printing) resolution will remain the default of the selected printmode There could be an impact on Image Quality because of the reduction in the rendering resolution, this will be especially noticeable in circles and lines with very low inclination.

se ‘Econofast’ printmode. The rendering resolution will be selected by

4 U

default to 300 dpi. From the Printint Preferences pane, select custom

2-25 HP Designjet T Series — Service Manual

Page 86

System Error Codes - Full Descriptions

options and select Economode.

If the Out of Memory message still persists, proceed to the next

rkaround.

then settings. In the Custom Print Quality Options pane,

5 Out

of Memory issues can always be solved if the processing of the job can be performed before reaching the printer. This can be done by selecting ‘Send Job as Bitmap’. The main processing of the print job will then be performed by the computer. This means that more computer resources can be used to process the plot. This form of printing is recommended in the case where the print job contains raster images plots, and mixed plots with raster images and lines, this is because the process of turning the print job made of raster images to vector images leads to a significant increase in the display list size.

HP Designjet T Series — Service Manual 2-26

Page 87

System Error Codes - Full Descriptions

System Error:

Problem Description:

Corrective action: Try the following:

71:19 (T1100/T1100ps/T610)

Default Serial Number found in the main and backup NVM. It seems that both the PrintMech PCA and Hard Disk Drive have been replaced together.

 Perform the Error 71:19 Recovery Service Utility. See 13. E r ro r 71:19

Recovery (T1100/T1100ps/T610) on page 3-51.

You must never replace both the Formatter and the PrintMech PCA at the sam

e time. If both parts need to be replaced, you must first replace one part and then power on the printer until it completely initializes. Then you can power off the printer and replace the other part.

System Error:

Problem Description:

Corrective Action: Check the internal error code:

72:YZ

A service calibration must be performed. Check the internal error code to see which calibration must be performed. To check the internal error code, press UP and CANCEL together while the error code is displayed.

 0x07090001 (gain). Perform the Line Sensor Calibration. See Line Sensor

Calibration on page 4-14.

 0x07090002 (LS2K). Perform the Line Sensor Calibration. See Line

Sensor Calibration on page 4-14.

 0x07090003 (DD). Perform the Drop Detector Calibration. See Drop

Detector Calibration on page 4-12.

 0x07090004 (Adv). Perform the Paper Advance Calibration. See Paper

Advance Calibration on page 4-6.

 0x07090005 (Alig). Perform the Printhead Alignment Calibration. See

Aligning Printheads on page 1-48.

 0x07090008 (Analog Encoder). Perform the Paper Advance Calibration.

Paper Advance Calibration on page 4-6.

See

System Error:

Problem Description:

Corrective Action: Try the following:

HP Designjet T Series — Service Manual 2-27

73:YZ

Servo Error.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the Printer has the latest Firmware version. If not, update the

2 C

Firmware to the latest version.

erform the Scan Axis Test to troubleshoot the problem further. See 1. S c a n

3 P

Axis on page 3-6.

the System Error continues, perform the Media Drive diagnostic test to

4 If

troubleshoot the problem further. See

2. Paper Drive on page 3-18.

Page 88

System Error Codes - Full Descriptions

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

Corrective Action: Try the following:

74:YZ

Error uploading firmware update file.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

2 Mak

3 T

e sure the connection between the computer and the printer is

functioning properly.

ry to update the Firmware again.

74.1:YZ

Error uploading media profile update file.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

2 Mak

3 T

e sure the connection between the computer and the printer is

functioning properly.

ry to upload the media profile update file again.

System Error:

Problem Description:

Corrective Action: Try the following:

75.21:YZ

The spittoons (Left Spittoon, Service Station) have reached 80% capacity.

 Use Preventive Maintenance Kit #2 to replace the Left Spitton and Service

Station.

System Error:

Problem Description:

Corrective Action: Try the following:

75.22:YZ

The spittoons (Left Spittoon, Service Station) are full.

 Use Preventive Maintenance Kit #2 to replace the Left Spitton and Service

Station.

System Error:

Problem Description:

Corrective Action: Try the following:

76: YZ

Hard disk drive is full.

 Remove any unnecessary files from the hard disk using the web server.

HP Designjet T Series — Service Manual 2-28

Page 89

System Error Codes - Full Descriptions

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

77:YZ

Web access application. The web server is not functioning correctly.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the Printer has the latest Firmware version. If not, update the

2 C

Firmware to the latest version.

78:08

The job received can not be printed without borders on this paper.

se a paper that supports borderless printing.

1 U

his system error code does NOT require service help. It should be resolved

2 T

by the customer.

78.1:YZ

Media settings area missing in media settings file.

Corrective Action: Try the following:

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the Printer has the latest Firmware version. If not, update the

2 C

Firmware to the latest version.

pdate the OMES.

3 U

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

79:YZ

Generic Firmware error.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

heck that the Printer has the latest Firmware version. If not, update the

2 C

Firmware to the latest version.

If you see system error 79:04, see

79:04 on page 2-35.

79.1:YZ

Recoverable firmware error that does not stop the printing process.

Appendix A: How to troubleshoot SE

Corrective Action: Try the following:

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

HP Designjet T Series — Service Manual 2-29

Page 90

System Error Codes - Full Descriptions

cord. Reconnect the power cord and power On the Printer.

heck that the Printer has the latest Firmware version. If not, update the

2 C

Firmware to the latest version.

System Error:

Initial checks: This error can occur because the printer has been dropped during

81:YZ

transportation, causing structural damage. Before continuing with the 81:YZ troubleshooting, first look for structural damage.

To identify the structural damage, look for the following three things:

 Consistent 81:YZ error codes.  Platen fingers rubbing on the roller surface, leaving black marks on the

roller.

 A gap on the platen beam. If there’s any gap in Z (vertical direction)

between the plastic feature of the platen and the metal side plate, then

HP Designjet T Series — Service Manual 2-30

Page 91

System Error Codes

the chassis is damaged and the unit cannot

Problem

scription:

Corrective Action: Try the following:

Problem with paper advance. This source of error could come from an error in any of the following systems: paper motor, disk encoder, cables or main electronics.

pen the Window and check for any visible obstacles restricting the

1 O

movement of the Drive Roller. If there is a wrinkled mass of media inside the paper path, lift the Pinchwheels (using the Media Lever) and clear the obstruction.

be repaired.

sid

erform the Media Drive diagnostic test to troubleshoot the problem further.

2 P

2. Paper Drive on page 3-18.

See

the printer has a 44 inch scan axis (and a Rewinder), perform the

3 If

Rewinder diagnostic test to troubleshoot the problem further. See

Rewinder on page 3-34.

heck the connections on the Main PCA; the Media Advance Drive is

4 C

connected to the connector labeled Paper Motor.

djust the encoder disc and motor mount configuration using the Media

5 A

Advance Drive installation instructions. See

6-224.

6 If the S

System Error:

Problem Description:

Corrective Action: Try the following:

1 S

ystem Error continues, replace the Media Advance Drive. See Media

Advance Drive on page 6-224.

84:YZ

Back tension servo shutdown (roll feeding).

witch the Power OFF from the back of the Printer and disconnect the Power

cord. Reconnect the power cord and power On the Printer.

Media Advance Drive on page

2-31 HP Designjet T Series — Service Manual

Page 92

2 If

the problem persists, contact HP support.

System Error Codes - Full Descriptions

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

85:YZ

Problem finding the Drive Roller zero.

erform the Media Drive diagnostic test to troubleshoot the problem further.

1 P

2. Paper Drive on page 3-18.

See

2 If the

System Error continues, replace the Encoder Disk and Encoder Sensor.

Encoder Disk and Encoder Sensor on page 6-222.

See

86:YZ

Possible Paper Jam.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

pen the Window and check for any visible obstacles restricting the

2 O

movement of the Drive Roller. If there is a wrinkled mass of media inside the paper path, lift the Pinch wheels (using the Media Lever) and clear the obstruction.

87:YZ

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

Corrective Action: Try the following:

Problem finding the Scan-axis encoder reading.

pgrade the firmware.

1 U

lean the Encoder Strip.

2 C

eplace the Encoder Strip. See Encoder Strip, spring and nut (T1100/

3 R

T1100ps/T610) on page 6-96 or Encoder Strip, spring and nut (T1120/ T1120ps/T620) on page 6-99.

eplace the Carriage PCA. See Carriage PCA (T1100/T1100ps/T610) on

4 R

page 6-177 or C a r r i a g e P C A ( T 112 0 / T 112 0 p s / T 6 2 0 ) on page 6-182.

eplace the Trailing Cables. See Trailing Cable (T1100/T1100ps/T610) on

5 R

page 6-102 or Trailing Cable (T1120/T1120ps/T620) on page 6-109.

93:YZ

Unable to pressurize the Ink Delivery System. The ISS Motor does not move as expected.

witch the Power OFF from the back of the Printer and disconnect the Power

1 S

cord. Reconnect the power cord and power On the Printer.

erform the Ink Delivery System diagnostic test to further troubleshoot the

2 P

problem. See

7. I n k D e l i v e r y Sy s t e m ( I D S ) on page 3-35.

HP Designjet T Series — Service Manual 2-32

Page 93

System Error Codes - Full Descriptions

3 R

eplace the Left Ink Supply Station, depending on the results of the

diagnostic test. See

fter replacing the Left Ink Supply Station, if the problem persists replace the

4 A

Main PCA. See

T610) on page 6-206 or Electronics Module Main PCA & PSU (T1120/ T1120ps/T620) on page 6-209.

Left Ink Supply Station on page 6-187.

Electronics Module Main PCA and PSU (T1100/T1100ps/

System Error:

Problem Description:

Corrective Action: Try the following:

System Error:

Problem Description:

Corrective Action: Try the following:

94:YZ

Color calibration Error.

ofiling failed due to a different error (not algorithm / data processing).

1 Pr

erform the Line Sensor calibration. See Troubleshooting, Line Sensor. See

2 P

The Line Sensor has Problems Detecting Media on page 1-5.

the System Error continues, replace the Line Sensor. See Line Sensor

3 If

(T1100/T1100ps/T610) on page 6-156 or Line Sensor (T1120/T1120ps/ T620) on page 6-161.

the System Error continues, replace the Carriage PCA. See Carriage PCA

4 If

(T1100/T1100ps/T610) on page 6-177 or C a r r i a g e P C A ( T 112 0 / T 11 2 0 p s / T620) on page 6-182.

the System Error continues, replace the Formatter. See Formatter on page

5 If

6-204.

94.1:YZ

Profiling algorithm failed.

ofiling failed due to a different error (not algorithm / data processing).

1 Pr

erform the Line Sensor calibration.

2 P

3 See

4 If

5 If

6 If

System Error:

Problem Description:

Corrective Action:

1 S

HP Designjet T Series — Service Manual 2-33

The Line Sensor has Problems Detecting Media on page 1-5.

the System Error continues, replace the Line Sensor. See Line Sensor

(T1100/T1100ps/T610) on page 6-156 or Line Sensor (T1120/T1120ps/ T620) on page 6-161.

the System Error continues, replace the Carriage PCA. See Carriage PCA

(T1100/T1100ps/T610) on page 6-177 or C a r r i a g e P C A ( T 112 0 / T 11 2 0 p s / T620) on page 6-182.

the System Error continues, replace the Formatter. See Formatter on page

6-204.

98:YZ

Automatic backup print mode enabled. Try the following:

witch the Power OFF from the back of the Printer and disconnect the Power

Page 94

System Error Codes - Full Descriptions

cord. Reconnect the power cord and power On the Printer.

 Recover the printheads.

HP Designjet T Series — Service Manual 2-34

Page 95

System Error Codes

Appendix A: How to troubleshoot SE 79:04

Introduction

The System error 79:04 is a generic firmware error (equivalent to a blue screen in Windows). It’s the System Error that the printer will display when an unknown exception occurs that cannot be pointed to by any specific subsystem of the printer.

Since this is a generic error, there can document will cover the most probable causes behind a system error 79:04 and will recommend the most efficient troubleshooting steps to resolve customer issues.

One important point to mention is that, although 79:04 system errors can be

sed by a hardware malfunction, the vast majority of 79:04 system errors

cau are pure software or firmware issues. In these cases the issue can only be solved by determining the root cause and implementing a solution. The solution can usually be applied by either correctly configuring a selection, updating the printer’s firmware/software that is being used or by fixing an error in the code).

be multiple causes behind it. This

Possible causes

1 T

2 In the

3 T

4 A

5 If

Since the 79:04 system error is a generic error, the number of possible causes behind it is large. The majority can be grouped, however, into the following groups.

Job related SE79:04

A specific print job that is not correctly formatted for the printer or that is not

rectly processed by it can trigger a 79:04 system error.

cor The incorrect format or processing can come from two sources:

 Incorrect commands in the job itself. For example, a PS job with some

commands that do not have the correct PS format.

 Issues applying to the settings in the job

Possible symptoms

79:04 caused by a print job always have the same symptoms:

he job is received by the printer and starts to process.

middle of the processing, the printer stops and displays 79:04.

he printer will display the 79:04 system error again immediately after reboot. This is due to the fact that the printer will try to reprint the job, which is pending in the queue, after reboot.

fter the second reboot, the printer will start up normally

the same job is sent again, it will always produce a 79:04 system error

2-35 HP Designjet T Series — Service Manual

Page 96

Appendix A: How to troubleshoot SE 79:04

These types of 79:04 system errors are normally caused by jobs that have been gene exported by an application to PS, PDF, HP-GL/2, RTL, … or any other format supported by the printer). Jobs generated by HP drivers will not normally generate 79:04 system errors, since the output that our drivers generate is very controlled and has been designed taking into consideration the characteristics of our printer’s language interpreters.

There is an exception to this general rule: can generate their own PS code (Adobe PhotoShop, Adobe Illustrator, Adobe Acrobat, Corel Draw, Freehand, QuarkXpress, …). When used with a PS driver, these applications generate the output PS themselves, instead of using the driver’s rendering capabilities. This is known as PostScript passthrough. So, when using an HP PostScript driver together with an application that has PS passthrough capabilities, the PS code that comes into the printer has not been rendered by the HP driver, and, should the source file contain any PS commands that are not correctly processed by the printer, a 79:04 system error could occur even though an HP driver is being used.

Solutions and workarounds

When a job consistently generates a 79:04 system error, it is either because

f a issue in the printer’s firmware or because of a defect in the job itself

o (when it has been generated by 3rd party SW). In order to identify the cause and find out a solution, these issues should always be immediately escalated to the GBU through the GCC.

Also, there are a set of workarounds and short term solutions that can be

sted in order to get the customer up and running in the shortest possible

te time:

nd the job using a variety of different settings. Many times, the issue is

1 Se

caused by a combination of the job contents combined with some specific setting(s).

2 If the

driver instead.

rated by 3rd party applications (RIPs, 3rd party drivers, files

there are certain applications that

customer is sending the file directly to the printer, try using the HP

the issue is occurring when printing through the HP PostScript driver from

3 If

an application with PS passthrough, try changing the options in the application so that it prints PS as raster (the option is typically located in the “Advanced” options of the application’s printing dialog).

Data related SE79:04

HP Designjet printers have Hard Disks and non v contain data bases and files that can be modified with user data. Some examples include:

olatile memories that

 The printer’s queue  The hard drive partitions that contain user jobs  The data base that stores the printer settings  The data base that stores accounting information

Some of this data is accessed by the printer at start up, and some others are

cessed as needed.

HP Designjet T Series — Service Manual 2-36

Page 97

Appendix A: How to troubleshoot SE 79:04

If any of this fields contains corrupt data or data with characters or values that cannot occur.

Possible symptoms

There are two different types of symptoms for data related 79:04 system

rors:

hen the corrupt data is accessed during start up:

1 W

he printer will display a 79:04 during the start up process

a T

b S

will continue displaying the 79:04 system error until the corrupt data has been cleared through a service procedure

hen the corrupt data is accessed during normal printer operation

2 W

he printer will start up normally

a T

b W

the queue or when changing some settings), the printer displays a 79:04 system error

he printer can reboot normally

c T

d W

as in step “b”), the 79:04 system error is displayed again

be correctly processed by the printer, a 79:04 system error may

witching the printer off and on again will not solve the issue. The printer

hen the data is accessed (for example while printing, while navigating

hen the data is accessed again (typically, under the same conditions

Solutions and workarounds

Many times, data related 79:04 errors are resolved by means of hardware

tervention. Since data is stored in physical components (RAM, EEROM

in and Hard Disk), replacing these components with new ones which are empty usually solves the problem. However, there are quicker and more effective solutions to these types of errors:

lear all information that has been introduced by the user using the

1 C

standard tools available in the printer:

a Dele

b R

a Dele

2 If s

additional information that could be causing the issue:

a S

b P

3 If

information on the Hard Disk and the different EEROMs, leaving them in an equivalent state to a new part:

a A

b In

te all jobs from the queue (from the Front Panel or the EWS)

eset to factory defaults to clear the user’s configurations and calibrations

te any non standard paper preset in the printer (both the ones that have been created by the user and the ones that have been installed as OMES profiles through the EWS or the HP Printer Utility)

tep 1 did not resolve the issue, you can use Service Tools to clear

tart the printer in Diagnostics Boot Mode

erform an EEROM reset

step 2 did not resolve the issue, it is possible to completely clear the

ccess the Service Utilities Menu

the Secure Disk Wipe menu, set the Sanitize level to “Unsecure mode”

HP Designjet T Series — Service Manual 2-37

Page 98

Appendix A: How to troubleshoot SE 79:04

c Ex

ecute the Disk Wipe. This takes 45-75 minutes and it will completely clear all partitions in the Hard Disk which contain user data, including the partition where the Operating System is installed. After the disk wipe has completed, a backup firmware version will automatically be installed from a backup partition to allow the unit to start up. This firmware version is very old.

he firmware in the printer should be upgraded to the latest official

d T

version as soon as the printer has restarted.

After step “c”, any 79:04 which is caused by corrupt data in the printer will be s

olved.

Important note:

It is possible that the corrupt data came to be in the printer as a

equence of some activity in the customer’s workflow. In this case, it is

cons possible that the issue will happen again. In these cases, it is very important to understand the sequence of events in the customer’s workflow that led to the error occurring. Once the error can be traced in the customer’s workflow, escalate the issue to the GBU (through the GCC). This is done to implement any changes in the printer’s firmware that can prevent these issues occurring again.

Network related SE79:04

Most HP Designjet printers have built-in networking capabilities. Network

ettings can be set manually, but in the majority of cases, they are obtained

s automatically from the printer. These settings include many different fields, such as IP address and subnet mask, available gateways, host and domain names, etc.

In some cases, there can be issues in the firmware that can cause a certain

alue in one of these fields to be interpreted incorrectly, and this can lead to

v a 79:04 system error.

Symptoms

There is no single set of symptoms that can absolutely pinpoint a network

elated 79:04 system error. However, the following guidelines can be

r applied:

 It can happen at start up or when accessing the Network Configuration

section of the FP

 In both cases, repeating the action with the LAN cable disconnected

does not cause the 79:04 to occur

Solutions and workarounds

In the majority of cases, these issues will be due to an issue in the printer’s

irmware. As soon as the conditions where the issue happens can be

f understood, it should be escalated to the GBU through the GCC.

At the same time, the following short t help the customer to get up and running in the shortest possible time:

sconnect the network cable to be able to boot the printer and change

1 Di

network settings

2 In the

Network configuration menu in the Front Panel, disable any protocols

that you are not using, including IPv6, SNMP and WebServices.

erm solutions and workarounds can

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Page 99

System Error Codes

3 If

step “2” does not work, try setting a manual configuration of the device:

ter the correct subnet mask and an IP in the valid range

a En

the GateWay field, set the same value as in the IP address field

b In

o not set a host name or a domain name

c D

step “3” does not work and the customer is using the network card which

4 If

is part of the printer, try using an accessory Jetdirect card instead.

User Interaction related SE79:04

In some cases the printer may not react as expected when a certain set of

ons coincide. In these cases, if the printer doesn’t know how to react,

conditi it may simple display a 79:04 system error and force a reboot. Some examples (not real) that can help to illustrate this:

 An error occurs when a job is cancelled when it is at the “Finishing print”

state and when the queue is disabled

 An error occurs if the Window is opened while the printer is checking the

printheads

These errors will most likely only happen in very specific corner cases that ha

ve not been identified during the development or the qualification of the printer, so normally, they do not severely impact the customer, as they do not affect their regular working flows.

Symptoms

The symptoms here are as numerous as the number of possible interactions

tween the user and the printer. In any case, it’s possible to identify the

be steps that caused the error to occur and avoid them as the steps will always be the same with no variance.

Important: An major element in determining the error is what the state the

inter was in at the time the error was displayed. Actions the user has made

pr when the printer is drying for example can produce an error, whereas the same action when the printer is doing something else (or is idle) may not produce any errors.

Solutions and workarounds

The recommended action plan in these cases is to identify the previous steps

aused the error and:

that c

scalate the issue to the GBU through the GCC in order to have it corrected

1 E

in the firmware.

ecommend to the customer that they try to avoid the same steps to prevent

2 R

the issue

the conditions that cause the error are in the customer’s regular workflow,

3 If

try to identify a different way of achieving the same result out of the printer.

Random SE79:04: Concurrence issues and memory leaks

Some 79:04 errors happen randomly when the printer is being heavily used.

owever, it’s impossible to find a single set of conditions that reproduce the

H problem. It just happens from time to time, without a defined pattern.

These random 79:04 can have two different types of root causes:

 Memory leaks: before a program is executed, it allocates the memory it

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Page 100

Appendix A: How to troubleshoot SE 79:04

will need. After the execution is complete, the allocated memory is freed t

o be used by other programs. If the allocation or the release of the memory are not properly programmed, every time the program is executed some memory will be incorrectly labeled (either as used or as free). This is known as a memory leak. When a program with a memory leak is executed a lot, the memory becomes progressively full (since it is not properly freed). When the leak becomes too big, the printer is left ‘out of memory’ to execute new processes and a 79:04 is triggered

 Concurrence issues: there are certain resources that can be accessed by

multiple programs or by multiple executions of the same program (what is known as multiple threads). Access to these resources must be correctly controlled to prevent unexpected behavior. Issues caused by an incorrect control of these resources are concurrence issues.

In the following you have a simple example: counter that controls the communication between the JetDirect card and the printer’s firmware. Whenever a new packet of information is sent by the JetDirect card to the printer, the counter increases. When the printer receives the packet and processes it correctly, the counter decreases. Another process checks the counter from time to time to see its value and take conclusions from it. If the counter is near 0, it means that the printer is processing correctly, and if it grows too big, it may mean that there is a bottleneck somewhere and maybe the JetDirect card throughput is decreased to control its speed to the printer. However, if the access to this counter is not properly controlled, undesirable effects may happen: in a real environment, a JetDirect card processes thousands of information packets per second, so this counter is updated frequently, both by the JetDirect and the printer. If at a certain point the JetDirect and the printer try to access the counter at the same time and the code is not prepare to handle this, it may happen that the JetDirect cannot increase the counter because the printer is writing to it, and what’s worse, that it does not realize this fact. If this happens a few times each second, it may happen that the counter is decreasing faster than it’s increasing and that at a certain point it has a negative value. And then, what will the process that is checking this counter do? Most likely, the process will not be prepared to react to a negative value and will launch an exception that will trigger a 79:04 system error.

let’s imagine that there is a

Symptoms

This type of 79:04 always occurs in heavy load conditions, so the symptoms

ill always be similar to this pattern:

 A printer that is being heavily used (printing a project or in a

reprographics environment) produces 79:04 errors randomly, forcing the user to reboot.

 After rebooting, the printer can be used without any issues for an

extended period of time, but if the workload is consistently high, a random error will occur again.

 The error can never be associated with a specific file. The file that was

being printed when the error occurred the last time can be printed without issues after reboot. And a file that has been printed without issues several times can trigger the error in the future.

 This error is very dependant of the workflow the customer has. The most

common user workflows have been extensively tested both by HP and by

HP Designjet T Series — Service Manual 2-40