HP Designjet T1120, Designjet T1100, Designjet T610 service manual

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HP Designjet

T1100/T1100ps/T610/

T1120/T1120ps

Printer Series

Version 6

March 19, 2009

For HP I nternal Use O nly

©Copyright Hewlett-Packard Company 2009

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.

Version 6: March 19, 2009

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 fr om the power source prior to performing any maintenance.

- Prevent water or any other liquids from running onto electrical components or circ uits , or through openings in the enclosure.

Electrostatic Discharge

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

WARNING

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 , practi ce, or the lik e, 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 Valles Spain

Safety Symbols

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

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 info rmation about Using this Manual, please refer to the next page.

HP Designjet T Series — Service Manual -1

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 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 and Q

uick Ref erence Guides.

Readership

The procedur es de sc r ibed in this Se rvi ce Manual ar e to be perfor med b y HP Certi fied service personnel only.

Part Numbers

Part Numbers for Printer options, accessories and service parts are located

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, you can click on that link to be taken there directly.

-2 HP Designjet T Series — Service Manual

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 n ot Power ON 1-5 The Printer Continuously Rejects Printheads 1-5 Cover Sensors are not Working 1-5 The Line Sensor ha s 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 Servi ce 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) 1-25

Lines are Missing, Too Thin, or Too Thick 1-26

Problems with Stepped Lines 1-27

Lines are Printed Double or in Wrong Colors 1-27

Lines are discontinuous 1-28

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

Problems with Graininess 1-29

Paper is not Flat 1-29

Ink marks on the paper 1-30

Horizontal smears on the front of coated paper 1-31

Ink marks on the back of the paper 1-31

Problems with the Edges of objects 1-32

Stepped or not sharp 1-32

Darker than expected 1-32

Black and white prints do not look neutral 1-32

Horizontal lines at the end of a c u t sheet print 1-32

Verti cal lines of different colors 1-32

White spots on the print 1-33

HP Designjet T Series — Service Manual 1-1

Problems with Color Accuracy 1-33

Output Only Contains a Partial Print 1-34

Problems with Image Clipping 1-34

Some objects are missing from the printed image 1-35

A PDF file is clipped or objects are missing 1-35 Print Quality Troubleshooting Wizard 1-35

Ink Supplies Troubleshooting 1-39

Introduction to ink supplies 1-39

What are Ink Supplies? 1-39

Ink Cartridges 1-39

Available Ink Cartridges 1-40

Printheads 1-40

Available Printheads 1-41

General Information About the Ink Supplies 1-41

General Precautions When Handling Ink Supplies 1-41

When Should You Replace the Ink Supplies? 1-42 Ink Cartridge Levels, Information, and Replacement 1-42

Ink Cartridge Le vels 1-42

“View Ink Levels” Direct Access Key 1-42

“View Ink Levels” from the ink menu 1-42

Obtaining Ink Cartridge Information 1-42

The printer consumes more gray ink ink than M, C, or Y 1-44

Changing an Ink Cartridge 1-44 Printhead Information, Replacement and Alignment 1-46

Obtaining Printhead Information 1-46

Changing a Printhead 1-47

Aligning Printheads 1-49

Reinsert Printheads Procedure 1-49

Image Quality Maintenance Procedure 1-49

Scanning errors during alignment 1-50 Ink Cartridge and Printhead Status Messages 1-50

Ink Cartridge Status Messages 1-50

Printhead status messages 1-51

Printhead Error Codes 1-51 Solving Ink Supplies Problems 1-53

You Cannot Insert the Ink Cartridge Into the Printer 1-53

You Cannot Insert the Printhead Into the Printer 1-53

The front panel says to reset or replace a printhead 1-53 Maintaining and Cleaning the Pr intheads 1-54

Clean the printheads 1-54

Flex Contacts Cleaning Tool 1-55

HP Designjet T Series — Service Manual 1-2

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 wh

 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

en prompted.

Up and Down

Cancel

Power

Back

Service Key Combinations

 Diagnostic mode

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

eys down, press and hold the Power key to tur n 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.

HP Designjet T Series — Service Manual 1-3

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 System Error Codes on page 2-1 contains a list of system error

codes and their respective descriptions and recommended corrective

ons. Only try one recommended action at a time and c heck if the error

acti code has 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 sur e that you

supply the full Error 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 inf ormation on the Service Tests and how to use them see Chapter 3

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 Serv ice Calibrati ons and how to use them s ee

Service Calibrations on page 4-1.

Remember that certain Calibrations are required even if an

Assembly has been disassembled to gain access to another

Assembly or Component.

Chapter 4

1-4 HP Designjet T Series — Service Manual

Solving Print Quality Problems

Whenever a Print Quality problem appears, it is ad visable to print the Diagnostic Pr int to help di agnose the problem. The Di agnos ti c Pr int w ill he lp you differ entiate between po ssible prin thead err ors and other pr oblems such as incorrect front-panel selection, driver or RIP configuratio n or mechanical problems.

The Front Panel is blank

1 See What to do if the Front Panel is blank on page 2-3.

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.

3 Chec 4 C

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

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

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

General Troubleshooting

eplace the Power Supply Unit. See Starwheel Assembly on page 6-208.

5 R

The Printer Continuously Rejects Printheads

1 Clean the flex contacts on the Pr inthead and in the Carr iage Ass embly using

the Carriage Interconnect Wiper and try again. See

Tool on page 3-20.

2 If A

LL the Printheads are r ejec ted (the status mes sage on the Fr ont Panel does NOT sho w "OK" for ALL the Printheads) then perfor m the Elec tronic 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 u sed since the Line sensor may have

problems detecting transparent media or some types of Non-HP media. Try loading white HP media in to the Print er and chec k 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 4-15.

Flex Contacts Cleaning

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

3 T

Sensor (T1120/T1120ps) on page 6-157.

HP Designjet T Series — Service Manual 1-5

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 cr ash, thus causing many media jam failures to be reported as head crashes.

d the media jam occur when loading media?

1 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 clear 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.

2 Is the customer using non-HP media?

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

head crashes (es pecially head crashes because HP media is specially formulated to a vo id cockle , one of the primary caus es of head cr ashes). If the media is not HP approved, advise the cust omer t o us e 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 en vironment al 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:

Pe rfor m the Acc u rac y Calibr ati on in the new en v i r onmental conditi ons (R ef er

User’s Guide).

the

Worm marks on HP Coated media with light area fills

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

 Print the Service Configuration Print and check if the le vel of Humidity is

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

The media is causing t h e problem and NOT the Printer. Do not attempt to try and replace Printer parts to solve this problem.

1-6 HP Designjet T Series — Service Manual

The Media Basket was damaged during printer setup

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

need replacing.

2 Check the parts table and graphics in P

service parts you must order. See

3 Replace the component. See

Solving Media-Handling Problems

The Front Panel indicates that media is misaligned or incorrectly positi oned

Roll 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. This 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, locate

(rewinder included), should maintain proper back tension. If the Right Spindle Holder (re winder included) is misaligned or not properly attached to the printer, the Rewinder will not function properly.

For a gra phic of a properly installed Rewinder, see

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

problems with the Rewinder, see

arts and Diagrams to identify what

Printer Support on page 5-2.

Bin Assembly on page 6-10.

d on the Right Spindle Holder

Right Spindle Holder

6. Rewinder on page 3-34.

Sheet media

 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 Ro ller Service Utility.

1. Turn Drive Roller on page 3-58.

See

Check that the Ri ght Spindle Holder (r ew inder incl uded) is prope rly attac hed and screwed to the printer.

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

winder included), shoul d main tain proper back tension. If the Right

HP Designjet T Series — Service Manual 1-7

The Media Basket was damaged during printer setup

Spindle Holder (re winder inc luded) is misaligned or not proper ly attached to the printer, the Rewinder will not function properly.

To further di agnose problems with the Rewinder, See

3-34.

6. Rewinder on page

HP Designjet T Series — Service Manual 1-8

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 print quality or color problems. For information about how to use the Print Quality Troubleshooting Wizard, see Print Quality Troubleshooting Wizard

on page 1-35.

When faced with a Print Quality problem, perform the follo wing actions in order to resolve the problem:

1 Printer Configuration:

 Check that the paper type loaded cor res ponds to the paper type s elected

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

2 Perform Printhead recovery (Main Menu/Image Quality Maintenance/

lean Printheads).

3 Media:

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

4 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).

heck if the latest version of the firmware is

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 diagno 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.

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

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

installed. If not, install the latest

HP Designjet T Series — Service Manual 1-9

Print quality troubleshooting

The Image Quality Service Best Plot uses the Best Print Mode and is divided in to three parts as follows:

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

identify which Printh ead is faulty.

 Diagnostic Part 2: Printhead Alignment Te st . T his test is de signed to chec k

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 w hether the Printheads and the Media Advance Mechanism are working correctly.

2 Image Qu

Quality Service Best Plot but uses the Normal Print Mode.

3 Advanced Diagnostic Plot.

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

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

2 Use the same type of media that the cust omer was using when they found

the image q

3 If the customer is using non-HP media and after the Image Quality T est you

till have the same image quality problems, change to genuine HP media

s and repeat the Image Quality Test.

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

vanced Diagnostic procedures w hich will help you diagnose the pr oble m .

Printing the Diagnostic Print

1 In the

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

These tests provide mor e information of the IQ

The Advanced Diagnostic Prints on page 1-15.

uality problem.

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

2 You 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 Diagnosti cs menu.

3 If 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

Print quality troubleshooting

Alignment Diagnostic , Nozzle Health, For ce Drop Detecti on or Print Banding Plot, and press the Enter key to start printing.

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

System is cor rec tl y installed . Pr es s the OK ke y t o print the Di agnosti c Pr int or press Back/Cancel to exit without printing the Diagnostic Print.

5 The 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 corr

ectly.

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

e 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

nozz

les.

If any nozzles are not printing correctly they will be shown on the right of each Printhead Nozzle test. Ther e i s a ser ies o f number ed s tepped 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

Print quality troubleshooting

Below, the stepped lines highlighted in yellow are broken. When the line is completely broken, this means the nozzle is out.

Below, the stepped lines highlighted in yellow are misdirected. When the line is misdirected, this means the nozzle is malfunctioning or out of position.

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

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

st spaces between the corresponding lines.

Corrective Action

If the printer has nozzle defects , y o u can s The printer can automatically compensate for nozzle defects, so there is no need to replace the Pr inthead.

The method of improving Nozzle Defects is to:

1 Recover the Printheads, using the Front Panel Main Menu/Image Quality

Main

tenance/Clean Printheads option.

2 Reprint the Printhead Nozzles Test Plot to verify that the defective nozzles

ve been corrected.

3 If the problem continues, replace the defective Printhead.

agnostic Part 2: Printhead Alignment

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

gnment the printer may have.

till get perfect print quality results.

HP Designjet T Series — Service Manual 1-12

Print quality troubleshooting

1 If the Printer is experiencing horizontal misalignment problems, the

Alignment Test will show something like this:

2 If the Printer is e xper ienc ing vertical misalignment problems , the Ali gnment

Test will show something like this:

3 If the Printer is experiencing bi-directional misalignment problems, the

Alignment Test will show something like this:

Corrective Action

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

ign 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).

Diagnostic Part 3: Printheads & Paper Advance

This test is designed to c heck w hether the Pr intheads and the P ape r Adv ance

anism are wor king corr ectl y. This part of the Image Quality Test should

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

HP Designjet T Series — Service Manual 1-13

Print quality troubleshooting

Banding

If the Printer is experiencing a banding pr oble m, you will see repetitive horizontal 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 se

lected) with Err or Hiding ON. T he top band has 100% ink density patches while the bottom band has 50% ink density patches.

Troubleshooting Banding Problems

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

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

2 Recover the printheads using the option through the Front Panel (Main

Menu/Image Quality Maintenance/Clean Printheads). Reprint the Diagnostic Print or the pr int file and if the pr oblem persists , replace the f aulty Printhead.

If banding does o Advance problem :

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

ccur 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

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 (re fer to the

1 C

User’s Guide for more information).

2 Chec

3 If

4 P

k that the loaded media is the same type as selected in the printer. You can verify the media type selected through the F ront Panel (Main Menu/ Paper menu/View loaded paper).

the customer is using low quality paper, try recommending better quality 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 will be used f or the final print (Main Menu/Image Quality Maintenance/ Paper Advance Calibration/Calibrate Paper Advance).

If there is white point banding in o cannot be fix ed using the Pr inthead r ecov eri es, in s ome cases using the for ce a drop detection option can f i x this issue . See

1-24.

nly one color band and the problem

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 mor e information of the IQ

HP Designjet T Series — Service Manual 1-15

Print quality troubleshooting

Printi ng the Advanced Diagnostics Print

1 In the Service Utilities submenu, scroll to “Diagnostic Print” and pr ess OK.

2 Y ou w ill be giv en thr ee options . Us e the Arrow ke y s to select the A d vanced

Diagnostics menu.

3 From the displayed options, use the Arrow keys to make th e required

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

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

System is cor rec tl y installed . Pr es s the OK ke y t o print the Di agnosti c Pr int or press Back/Cancel to exit without printing the Diagnostic Print.

5 The selected Advanced Diagnostic Print will now be printed and, if

necessary, automatically scanne d.

Reading the Advanced diagnostic Print Results

Paper Advance

This plot helps you to visually check any You use it to pr ecisely measure the media adv ance er ror with a one dot r ow accuracy, and to verify the stability of the media advance.

alignment problems of the printer.

HP Designjet T Series — Service Manual 1-16

Print quality troubleshooting

The whitest vertical line should be positioned in the 0 offset column with minor variatio ns between +2 and -2 columns. If the offset is not positioned on the 0 column or between +2 and - 2 col umns and the whitest vertical

varies greatly, the printer requires Image Quality Maintenance/Paper Advance C Advance).

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

Paper Advance Calibration (Main Menu/

alibration/Calibrate Paper

HP Designjet T Series — Service Manual 1-17

Print quality troubleshooting

The following plot shows correct media advance, there is a straight white line positioned close t o the 0 column for the majority of the points.

HP Designjet T Series — Service Manual 1-18

Print quality troubleshooting

The follo wing plot show s a bad media ad v ance , ther e is a str aight w hite line positioned clo se to the -6 colu mn, ins tead of the 0 column for the major ity of the points.

Corrective Action

To fix Paper Advance problems, try the following:

1 Check the Paper Advance Calibration Status. This can be done by going to

Main Menu/P displays the Paper Advance Calibration status. There are three status messages:

aper/View Loaded Paper. At the bottom, the Front Panel

 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 be fore. If

the printer continue s to ha ve banding and grainine ss pr oblems , calibr ate the Paper Advanc e from the user menu.

Whenever the printer's firmware is upgraded, the paper advance c alibration values will be reset to factory default.

HP Designjet T Series — Service Manual 1-19

Print quality troubleshooting

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

Image Quality Maintenance/Paper Advance Calibration/Calibrate

Paper Advance.

It is very important to verify that the loaded media is the

same media type as selected 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.

Some paper types are not suitable for Paper Advance

Calibration. Do NOT use colored papers or transparent

materials such as translucent bond, clear film, matte film,

tracing paper, or vellum.

Paper Advance calibr ation from the user menu will only calibrate the Paper Advance for the paper type loaded in the printer at that moment.

3 If Calibrate Paper Adv ance has mo stly solved the problem, try Adjust Paper

dvance to fine tune the Paper Advance (Main Menu/Image Quality

A Maintenance/Paper Advance Calibration/Adjust Paper Advance).

Select the per centage of change from -100% to 100%. To correct light

, dec

banding percentage.

he Paper Advance calibration from the service menu will calibrate the

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

rease 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 P aper Advance Calibration from the service menu is docu

mented in Chapter 5, Service Calibrations. See

Calibration on page 4-6.

Paper Advance

Printhead Alignment

To ensure you obtain meaningful results, use the s am e type of media that the customer was using when they encountered the image quality problem.

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

HP Designjet T Series — Service Manual 1-20

Print quality troubleshooting

The illustration shows the complete Printhead Alignment that identifies each of the specific alignment test results covered.

a b

The Printhead Alignment Diagno stic pr int sho ws the f ollo w ing di agnosti c tes t results:

a Line Sensor Calibration b Pen to Pen Align c Carriage thetaZ d Bidirectional align (high) e Bidirectional align (Low)

or tests a, b, and c, the order of the color band is:

For tests e and f, the order of the color band is:

Once the printer has correctly printed and scanned the Printhead Alignme nt Diagnostic print , the F r ont P anel displa ys the r esults. T he top ro w displa ys the printhead, and the left column displays the test.

HP Designjet T Series — Service Manual 1-21

Print quality troubleshooting

The results are seperated onto two scree ns. U se the Arrow keys to di splay the second resul t s screen.

Any printhead w ith a test r esult containing a number that is not wi thin the ±3 dot row range i s mi sali gne d .

The mK printhead is used as a reference to test the other printheads. If all the printheads fail the Pen to P en tests, it is the mK printhead that is misaligned.

Reading the Printhead Alignment Diagnostic Print

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

ear band is in the center of the pattern.

The following plot shows bad printhead alignment. The clear band is not in the center of the pattern.

Corrective Action

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

perform a Printhead Alignment. See

Aligning Printheads on page 3-14.

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

printhead.

HP Designjet T Series — Service Manual 1-22

Print quality troubleshooting

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

Nozzle Health

The print contains three separate parts.

b c

a The 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.

b Inspector measuring tool test plot.

Test b should NOT be used by Service Engineers.

c Nozzle Print Test which is als o part of the Image Quality Service P lot.

This test is designed to check that the Printhead nozzles print correctly. The test prints out e very single nozzle of each Printhead. No er ror hiding or Printhead Alignment algor ithm is applied. For each Printhead, you can see both the adjacent and the consecutive nozzles.

This is what you would see in the No

zzle Print Test part if there are

nozzles not printing correctly:

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

tepped diagonal lines. If one or more of the nozzles are malfuncti oning or

s mis-positioned, you will see that the stepped lines are broken or misdirected in one or more places.

n the left of each Pr inthead Nozzle test, there is a series of horizontal

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traight 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 do

es 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

men

u/Image quality maintenance/clean printheads).

HP Designjet T Series — Service Manual 1-23

2 Reprint the Nozzle Print test to check that the defective nozzles have been

corrected.

3 If the problem continues, replace the defective Printhead.

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 been reset drop detection is forced. 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

a single color is the

3 Mak

4 Chec

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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.

k 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.

HP Designjet T Series — Service Manual 1-24

Print quality troubleshooting

Horizontal Lines Across the Image (Banding)

Description of problem

When you look at the image you have pr acros s the image. Shown be low is an example of what y ou might see if you have this problem:

inted, there are horizontal lines

Corrective Action

1 Check that the paper type loaded corr es ponds to the paper ty pe s elect ed in

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

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

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

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ser’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 c

leaning. 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 6 Watc h the printe r carri age when it r eac hes the end of its s w ath. If ther e is an

une

xpected delay, this may cause the banding.

This delay is possibly the result of the following:

 The user is performing tasks with other appli cations while pr inting

(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.

HP Designjet T Series — Service Manual 1-25

Print quality troubleshooting

 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 o

2 Convert the f ile PDF. Formats like PDF require less resources to print, which

Lines are Missing, Too Thin, or Too Thick

Description of problem

Shown below is an example o f w hat you might s

f computer resources.

y solve your banding problem.

ee if you have this problem:

Corrective Action

1 Check that the paper type loaded corr es ponds to the paper ty pe s elect ed in

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

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

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

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ser’s Guide for mor e inf ormation). Select the c u stom print q uality 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 r

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5 C

6 U

esolution of the image is greater than the printing resolution, a loss of

line q

uality 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

inthead Alignment (Main Menu/Image Quality Maintenance/Align

Printheads). After alignment reprint the job.

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

per

form 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

gnificant amount of nozzles out in the color that is actually c aus i ng the problem (if see yo u a problem w ith the Black color in the cus tomer 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.

HP Designjet T Series — Service Manual 1-26

Print quality troubleshooting

Problems with Stepped Lines

Description of problem

When you look at the image you ha ve print ed there ar e ‘ s the borders of arrows and diagonal lines. The lines should be straight with no stepping.

Shown below is an example of what you might see if you have problems wi

th Stepped Lines:

Corrective Action

1 The problems may be inherent in the ima

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

2 Check that the appropriate print quality settings are being used (r efer to the

ser’s Guide for more information).

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

sing Glossy media and BEST quality, turn on the Maximum Detail

u option.

hange the image rendering resolution to

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Printmode) or 600 dpi depending on the printing needs. You can find the Max. Application Resolution option in the W indows driver dialog's Advanced tab, under Document Options > Printer Features.

ge that you are trying to print . Try

300 dpi (only in EconoMode

tepped lines’ in

Lines are Printed Double or in Wrong Colors

Description of problem

This problem can have various visible sym p toms, as shown below:

Colored lines are printed double, in

different colors

Borders of colored blocks are wrongly

colored

HP Designjet T Series — Service Manual 1-27

Print quality troubleshooting

Corrective Action

1 Reseat the Printheads by removing them and then reinserting them.

As you reseat the printheads, the printer will automatically align the printheads. It is important that the alignment is completed properly. See Aligning Printheads on page 3-14

Lines are discontinuous

If the lines are broken in the following way:

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

User’s Guide for more information).

2 Reseat the Printheads b y removing them and then reinserting them.

As you reseat the printheads, the printer will automatically align the printheads. It is important that the alignment is completed properly. Aligning Printheads on page 3-14

Lines are Blurred (Ink Bleeds from Lines)

Description of problem

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

Corrective Action

1 Check that the environmental conditions (t

for high-quality printing.

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

emperature , humi dity) are suitable

2 Make sure that the p

the paper type loaded into the Printer.

HP Designjet T Series — Service Manual 1-28

aper type selected in the Front Panel is the same as

Print quality troubleshooting

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

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

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

paper.

5 Align the printheads. See

1-49.

Problems with Graininess

Description of problem

Shown below is an example of what you might see if you have problems

th graininess:

Corrective Action

1 Check that the paper type loaded corr es ponds to the paper ty pe s elect ed in

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

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

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

2 C 3 Check that the appropriate print quality settings are being used (refer to the

ser’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

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inthead Alignment (Main Menu/Image Quality Maintenance/Align

Printheads). After alignment reprint the job.

Image Quality Maintenance Procedure on page

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

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per

form the paper advance calibration (Main Menu/Image Quality

Maintenance/Paper Advance Calibration/Calibrate Paper Advance).

fter Paper Advance Calibration, reprint the job.

6 A

per is not Flat

Description of problem

If the paper does not lie flat when it comes ou t of the Pr inter, but has shallow

ves in it, y ou ar e lik el y to see v isible defec ts in the printed image , su ch as

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

HP Designjet T Series — Service Manual 1-29

Print quality troubleshooting

Shown below is an example of what you might see if you have problems with the paper not being flat:

Corrective Action

1 Check that the paper type loaded corr es ponds to the paper ty pe s elect ed in

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

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

ry using a heavier paper type. When pr

2 T

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.

inting dense colors, it is

HP Designjet T Series — Service Manual 1-30

Print quality troubleshooting

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 quickly and e xpands. As the printheads mo ve ov er the paper, the printheads 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

1 Check that the paper type loaded corr es ponds to the paper ty pe s elect ed in

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

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

se a recommended paper type and the co rrect print settings.

2 U 3 If using sheet paper , try rot ating the sheet 90 degr ees . T he or ientati on o f the

per fibers may affect performance.

4 Try using a heavier paper type. When pr

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

ry to increase the mar gins by r elocating the image to the center of the page

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ith 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-

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

st of the paper.

Corrective Action

inting dense colors, it is

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

touching the foam between the ribs.

HP Designjet T Series — Service Manual 1-31

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 density than

Corrective Action

expected .

 If the print quality slider has already been s et 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 s et 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 op preference menu). See the User´s Guide for more infor mation.

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

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

appr horizontal lines may be seen across the print.

Corrective Action

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

1 Pr

need c

leaning. Reprint the job in case the problem has been solved

2 Try printing with roll paper. 3 Try using larger margins around the image.

ertical lines of different colors

The print has ve rtical bands of different colors along it.

tions submenu inside the printing

HP Designjet T Series — Service Manual 1-32

Print quality troubleshooting

Corrective Action

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

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

formation).

White spots on the print

White spots are seen on the pr int . This is pr obabl y due to paper f ibers , dust ,

e coating material.

or loos

Corrective Action

lean the paper manually with a bru sh bef or e pr inting , to r emo v e an y loos e

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ibers or particles.

2 Always keep the cover of the printer closed. 3 Protect paper rolls and sheets by storing them in bags or boxes.

oblems with Color Accuracy

Corrective Action

1 Ensure that the paper type be ing us ed has been co lor calibrated, which will

ve color consistency

from print to print, and from Printer to Printer.

2 Check that printing is on the correct side of the paper. 3 Check that the appropriate print quality settings are being used (refer to the

ser’s Guide for more information). Reprint the job in case the problem has

U been solved.

the problem consists of color differ

4 If

ences between your print and your 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.

5 Sele

ct suitable options in the application (r efer to the User’s Guide for more

formation).

HP Designjet T Series — Service Manual 1-33

Print quality troubleshooting

6 Print 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 sup

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

If these types of files hav e t o be used, try to ensure that the EPS, PDF, or gr

ayscale images ar e alr eady in the same color s pace that is intended to be used later on in Adobe InDesign or QuarkXPress. For instance, if the final objectiv e is to pr int the job in a pr ess that f ollo ws the S W OP standar d, 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 contains a partial image, then try the

ollowing to resolve the problem:

Was the If so, send the file again and make sure that the

2 The I/O Timeout setting may be too short. Increase the I/O timeou t setting

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

here might be a communications problem between the Printer and

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Computer. Check the USB or network cable between the computer and the Printer to make sure it is not damaged and is connec ted correctly.

Cancel

key pr ess ed befor e all the data w as r eceiv ed b y the Printer?

Cancel

key is not pressed.

4 Mak

5 If

e sure that the software settings are correct for the cu rrent 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

loaded paper and the printable area as unders tood by the softwar e . This kind of problem can often be identified before printing by previewing the print.

 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 , chec k that the softwar e

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.

HP Designjet T Series — Service Manual 1-34

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 Explanatio n

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

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

C they cannot handle an image of more than 32 ,768 pixels. If you try to print an image larger than this from the se 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 dr iv er contains an option called Compatibility with 16–bit applications, w hi ch can be u sed to reduce the resoluti on o f such images automaticall y . This option can be f ound option in the A dvanced tab, under Document Options > Printer Features.

Some objects are missing from the printed image

Large quantities of data may be neces format print j ob , and in some spec if i c w or kflo w there may be issues that can lead to some objects missing from the output.

Corrective Action

sary to print a high-quality large-

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

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

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

16-bit App. Compatibility to Enabled.

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

Max. Application resolution to 300.

The above s ettings are mentioned for troubleshooting purposes and may ad

versely aff ect the f inal output q uality or the time necessary to gener ate the print job. Theref ore, the y should be restored to the ir def a ult v alues if they do not help to solve the problem.

When working under Mac OS, the abov e settings ar e not av ailable. Ins tead,

y reducing the resolution of bitma p 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

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

be c high resolution. Upgrade the Adobe Acrobat or Adobe R eader software to the latest version . From v e rsi on 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 q uality and/or color issues, w henev er a c ustomer 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 doe s not meet their expectations.

HP Designjet T Series — Service Manual 1-35

Print quality troubleshooting

Some of these corrective actions that the customer can perf orm 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 T rou bleshooting Wi z ard tool ar e that it creates a better cus tomer experience, solving customer PQ issues fast, efficiently, and with a minimum cost for them and also for HP Support.

Customers can perfor m PQ/color troubleshooting through the Printer Utility (PU)

, the Embedded Web Server (EWS) or by following the steps described

in the User’s Manual or the HP Knowledge Center.

Print Quality Troubleshooting Wizard main window

When to use the Print Quality troubleshooting tool:

The Print Quality Troubleshooting Wizard can help customers solve their PQ/co

lor problems without the need to call to HP Support. Some of the

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

HP Designjet T Series — Service Manual 1-36

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 cu s t omer can perform to

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 par ameters

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 custo mer is exper ien cing

problems with print quality where w e 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 Utili ty under Windows: go to the Su

1 F

HP Designjet T Series — Service Manual 1-37

pport tab, and

select Print quality troubleshooting.

Print quality troubleshooting

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

quality troubles hooting.

For Mac OS

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

uality troubleshooting.

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

enance, then select Print quality troubleshooting from the list of

Maint maintenance tasks.

HP Designjet T Series — Service Manual 1-38

Ink Supplies Troubleshooting

Introduction to ink supplies

What are Ink Supplies?

For each of the ink colors u sed in the printer, there are two components, the Printhead and

Ink Cartridge. These components are called Ink Supplies.

Ink Supplies Troubleshooting

Ink Cartridges

The printer's si x Ink Cartri dges pr o v ide matte black , magenta , ye loo w, cyan, gra

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

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

also available

Printheads

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

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

eaning. As long as each Ink Cartridge is inserted correctl y into its slot, the ink will flow to the Printheads. Because the Pr intheads 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.

HP Designjet T Series — Service Manual 1-39

Ink Supplies Troubleshooting

The front panel displa ys the st atus of the Ink Cartri dge. U sing the front panel , detailed information can be checked on the Ink Cartridges.

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

tridge

HP 72 69 ml Yellow Ink Car

tridge

Ink Cartridge C9399A

Ink Cartridge C9400A

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

tridge

HP 72 130 ml Photo Black Ink Car

tridge

HP 72 130 ml Cyan Ink Car

tridge

HP 72 130 ml Magenta Ink Car

tridge

HP 72 130 ml Yellow Ink Car

tridge

HP 72 130 ml Gray Ink Car

tridge

Ink Cartridge C9403A

Ink Cartridge C9370A

Ink Cartridge C9371A

Ink Cartridge C9372A

Ink Cartridge C9373A

Ink Cartridge C9374A

Printheads

he Printheads are e xtr e mely durable and do not need to be replaced e v ery

T time an Ink C

artridge is replaced. They are independent of the Ink

Cartridges and w ill continue giv ing ex cellent image quality r esults ev en if the Ink Cartridges are low on ink.

If you notice a dec line in pr int quality such a s lines or dots mis sing fr om t e xt/ graphics, go to Page

Troubleshooting Print Quality Problems on page 6-22.

HP Designjet T Series — Service Manual 1-40

Available Printheads

Printhead Type Printer Model Part

Ink Supplies Troubleshooting

number

HP 72 Gray & Photo Black

nthead

Pri HP 72 Magenta & Cyan Printhead C9383A HP 72 Matte Black & Yellow

nthead

Pri

General Informat ion About the Ink Supplies

For optimum r e sults f rom the printer and modular ink deli v e ry s y s t em al ways fo

llow 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 col or-coded slots.  Follo w the instructions on the front panel of the Printer during ins tallation.  Avoid unnecessary removal of the Ink Cartridges and Printheads.  When turning off the Printer al w a y s u se the po w er Off button on the f r ont

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 r emo v ed when the pr inter is r ead y for y ou to r eplace them. The front panel will guide you through the removal and ins t allation 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 damage 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 Cartri dge whi ch is inserted in to the prin ter

as there may be a small amount of ink on the connec t ion.

 Avoid storing partially used Ink Cartridges on their ends.

HP Designjet T Series — Service Manual 1-41

Ink Supplies Troubleshooting

When Should You Replace the Ink Supplies?

When to change the ink supplies is mostl y deter mined by y ou w ith guidance from the front panel. In conjuncti o n 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 r ight time to change the ink supplies.

The Printer w ill also displa y the ink lev el and will t ell you w hen the ink supply

on ink. This means you ha ve constantl y updated informati on about the

is low ink supplies.

Ink Cartridge Levels, Information, and Replacement

Ink Cartridge Levels

The front panel displays Ink Levels sho w n a s level bars . T he s e 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 lev els” 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 Scroll to the Ink Menu icon and press OK.

HP Designjet T Series — Service Manual 1-42

Ink Supplies Troubleshooting

2 In the Ink Menu submenu , sc r oll to In k c artri dge inf o rmati on and pr es s

OK.

3 In the Ink Cartridge Infor mation su bmenu, scr oll t o the Ink Cartri dge that y ou

want information on and press OK.

4 The front panel displays information on the selec ted Ink Cartridge. Use the

Arrow keys to scroll thro ugh the information.

The informatio n suppl i ed 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 manufacture r of the Ink Cartridge (hp is recommended).  The current warranty status of the Ink Cartridge.

HP Designjet T Series — Service Manual 1-43

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 t aken to “correct” this attribute of the printer.

In general the higher freque nc y o f c hange is becaus e Matte Black ink is the one tha 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 Gra 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 print 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 pr inted b y comb ining C, M and Y inks w ith Gr a y. T allows printing soft colors by using less C, M and Y. These two types of contents are very typi cal and make the consumption o f Gra y to incr ease and the consumption of C, M and Y to decrease.

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

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

ed by using only Gr a y ink. In the past , these areas had to be printed b y

e addition of Gra y ink so ftens the color, improving tr ansiti on ar eas. It also

Conclusion

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

cc’s of ink consumption than the HP Designjet 500, 800 and 1000 se ries f or equivalent contents with equivalent leve ls of print quality.

Changin g an Ink Cartridge

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

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

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

cartridge for unattended printing (y ou 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. Remov e an ink cartridge only if you are ready to insert another one. Make sure the printer wheels are locked (the brake lever is pressed down) to prevent the printer from moving.

Change an ink cartridge using the following procedure:

HP Designjet T Series — Service Manual 1-44

Ink Supplies Troubleshooting

1 Scroll to the Ink Menu icon and press OK.

2 In the Ink Menu submenu, scroll to Replace ink cartridges and press

OK.

3 The front panel displays the status of the Ink Cartridges.

4 Press OK to continue. 5 Open the relevant Ink Cartridge cover for the Ink Cartridge you want to

eplace.

6 Pull the required Ink Cartridge straight up to remove it from the printer. 7 The front panel indicates the missing Ink Cartridge.

8 Before removing the cartridge from its wrapping, shake it vigorously. 9 Unwr ap the ne w ink cartri dge , f ind the label identify ing the ink color. Check

that the le the cartridge label.

10 Ins

ert the ink cartridge into its slot.

tter or letters marking the empty slot, matches the letter or letters on

HP Designjet T Series — Service Manual 1-45

Ink Supplies Troubleshooting

11 Push the cartridge into the slot until it snaps int o po siti o n. You should hear a

beep and see confirmation that the cartridge has been inserted.

12 When all cartridges have been inserted, close the cover.

Printhead Information, Replacement and Alignment

Obtaining Printhead Information

1 Scroll to the Ink Menu icon and press OK.

2 In the Ink Menu submenu, scroll to Printhead informa tion and press

OK.

3 In the Printhead Informati on submenu, scroll to the Printhead that you want

information on and press OK.

4 The front panel displays information on the selected Printhead.

The informatio n suppl i ed is:

HP Designjet T Series — Service Manual 1-46

Ink Supplies Troubleshooting

 The make of the printhead (hp no.72 is recommended).  The product nu mber 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

1 Scroll to the Ink Menu icon and press OK.

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

3 The 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 without inserting or removing any printheads, it will try to move back to its normal position at the right-hand end.

4 When the carriage has s topped moving, the f ront panel display will prompt

you to open the window and lift the carriage cover.

5 Open the window. 6 Lift the Carriage cover to acces s the printheads.

HP Designjet T Series — Service Manual 1-47

Ink Supplies Troubleshooting

7 Lift the blue handle and pull the Printhead straight up out of the Carriage. 8 To insert a new printhead first remove the orange protective caps.

9 The printhead is designed to prevent you from accidentally inserting it into

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 slow l y and v ertically, straight dow n. 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 Close the Window.

12 When all the printheads have been inserted correctly and accepted by the

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

ver.

printer, the printer will beep. If the printer doe s not beep when y ou 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

rintheads are correctly inserted.

HP Designjet T Series — Service Manual 1-48

Ink Supplies Troubleshooting

The printer will start checking and preparing the printheads. The default routine process, when all printheads are changed, takes 25 minutes. If the printer finds problems in preparing the printheads, it will take longer, up to 55 minute s. For a single printhead insertion , the times v ary 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 transiti 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

xperiencing problems with color accuracy you may need to align the

are e printheads. If the paper has j ammed, it is re commended that you r einsert the printheads and initiate the realignment procedure with the Image Quality

Maintenance menu.

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

ons, and sharp edges in graphical elements. Your

Reinsert Printheads Procedure

1 If the realignment process is running and

the cancel key on the fr ont panel . Do not pr int if the r ealignment pr ocess ha s been canceled. You can rest art the alignment with the Image Quality Maintenance menu procedure.

oad the paper you wish t o u s e,. You can use a roll or cut sheet, however, it

2 L

must

be A3 landscape or larger.

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

printhead. This will start the printhead alignment procedure.

4 Ensure the transparent window closed, as a strong light source near the

inter during printhead realignment can affect alignment.

5 The process will take about six minutes. W

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

1 L

ust be A3 landscape or larger (420 by 297 mm). Do not use transparent and semi-transparent paper to ali gn 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 t o the main men u and selec t the Image Quality

2 Pr

Main

tenance menu icon.

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

o run the realignment.

the wrong paper is loaded, press

ait until the front panel display

4 If the loaded paper is satisfactory, the pr

print a realignment pattern. Ensure the transparent window is closed, as a

HP Designjet T Series — Service Manual 1-49

inter will run the realignment and

Ink Supplies Troubleshooting

strong light source near the printer during printhead realignment can affect alignment.

Plot:

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

shows the process complete before using the printer.

Scanning errors during alignment

If the alignment process FAILs, a Scanning problems the front panel. This means that the alignment has not completed successfully. Therefor e the printer is not aligned and the alignment should be repeated before printing w ith good image quality. The problem may be due to:

message appears on

 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 paper, cleaning the printheads, and ke

eping the window closed, there may be a Failure in the scanning system needing reparatio n or the printheads, although clean, may not work and need to be replaced.

Ink Cartridge and Printhead Status Messages

Ink Cartridge Status Message s

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

Low The Low me

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.

Very Low When the Ver

be attempted. Changing the Ink Cartridge is strongly recommended to prevent the printer from stopping halfway through a print. There is

HP Designjet T Series — Service Manual 1-50

ssage is an early warning sign and it is advisable that new

y Low message is displayed, overnight printing should not

Ink Supplies Troubleshooting

approximately 8% of ink available for the user.

Empty The printer wil l st op and will not be able to continue printing until a ne w Ink

Cartridge has been installed. If this occurs halfway through printing an image, you should check the quality of this image, as stopping mi d-plot can affect 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. Re move all the printheads and insert them alone one by one, Closing the latch and the carriage cove r after every insertion. The front panel display will indicate the failing one show ing the reseat or replace message.

, but instead of remov ing the printhead , simply pr ess the OK ke y on the

panel front panel.

ails, clean the electr ical connec tions; if that f ails , r eplace the pr inthead w ith

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

HP Designjet T Series — Service Manual 1-51

Status Name

Status

Message

Description Comments

orking properly

Troubleshooting

Error Code

1 Fails

2 Fails

4 Shutdown Not used 8 Fails Vpp Replace Suspected vpp ink

16 Temp

32 Temp

64 Temp too

128 Temp too

256 Bad

512 No Pen Missing There is no

1024 Bad

2048 Wrong

4096 Mismatch Replace Wrong color

8192 CSdata Not

Status Name

Logical V

ntinuity

tremely High

tremely

Low

Hig

Low

umen

Info

cumen

Access

sponding

del

Status

Message

Replace The printhead may

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

have a vcc short

shor

temperature abo ve

normal margins

temperature belo w

normal margins

temperature abo ve

normal margins

temper

ature below

normal margins

info outside

margins

inthead

Acumen cannot be

accessed

inserted

erted

ins

commuication

failed

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

prev ent this. Err or

is redundant.

Mechanical

lockouts should

prevent this

Could be caused

by bad insertion

1-52 HP Designjet T Series — Service Manual

Ink Supplies Troubleshooting

Error

Code

384 CSdata

32768 Fails Energy

65536 Empty

131072 Full Dummy Remove Requested dur ing

262144 End of Life Warning Printhead

524288 Expired Warning Printhead has

Status Name

Tra

nsmit

Error

libration

Dummy

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.

Status

Message

Reseat CSdata

Reseat Energy calibration

during

Purge

Description Comments

commuication

incorrect

failed

warra

nty expired

used

expired or

non-HP ink

Could be caused

by bad contact

Could be caused

by bad contact

Requested dur ing

purge, otherwis e

should be

removed

pur

You Cannot Insert the Ink Cartridge Into the Printer

1 Ensu 2 Ensure that the Ink Cartridge is the 3 Ensure that the Ink Cartridge is the cor

1 Ensure that you have the correct hp no.72 Printhead. 2 Ensure that the printhead is the correct color for that slot. 3 Ensure that the printhead is in the correct orientation. 4 Ensure that the protective cap is removed from the Printhead.

1 F 2 Check the front panel display message, if it shows the ready message, the

3 Remove the printhead.

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

correct color for that slot.

rect orientation, with the color coded

label at the top.

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

You Cannot Insert the Printhe ad Into the Printer

he front panel says to reset or replace a printhead

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

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

HP Designjet T Series — Service Manual 1-53

Troubleshooting

4 Clean the electrical connect ions on the backside of the printhead with a lint

free cloth . You can carefully use a mild rubbing alcohol if mois ture is needed to remov e r esidue . Do not use w ater. You can use the F le x Contacts C leaning Tool.

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

tom side of the printhead , es pecially not with any alcohol .

5 Reinsert the printhead. 6 Check the front panel display message. If the problem remains, try a new

inthead.

Maintaining and Cleaning the Printheads

Clean the printheads

As long as the printer is kept turned on, an au to mati c c leaning is performed peri

odically. 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

imag

e (banding) and The Image Diagnosti cs Print before proceeding.

To c l ean the printheads, press the Menu key to return to the main menu and se

lect the Image Quality Maintenance menu icon, then Clean printheads. If you have gone through the Image Quality Diagnostic print process, you know whic h colors ar e failing . Selec t to the pair of pr intheads whi ch cont ain the failing colors. If you are not sure which colors to clean, you can also select to clean all pr intheads.

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

intheads t

pr than cleaning a single pair.

akes about si x minu tes. Cleaning all printheads uses more ink

1-54 HP Designjet T Series — Service Manual

Ink Supplies Troubleshooting

If you have cleaned the printheads using the Clean printheads procedure 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 electrical connections on the backside of the printhead.

You must remove the printhead (s ee Changing a Printhead on page 1-47) and using a cotton swab and a little de-ionized, distilled water , or C arriage

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

Int removed.

Flex Contacts Cleaning Tool

The Flex Contacts Cleaning Tool is part of the Maintenance Tool Kit which can be ordered using Part Number Q5 669-

60690. All the instructions 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 need cleaning. In extr eme 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

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

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

HP Designjet T Series — Service Manual 1-55

Troubleshooting

If the front panel displays the message “Reseat” or “Replace” next to the offending printhead, try cleaning the flex circuits of the Carriage and the

Printheads using the Carriage Interconnect Wiper.

Do not touch, wipe or attempt to clean the printhead nozzles. This can damag e the printhead and reduce print quality.

1-56 HP Designjet T Series — Service Manual

S ystem Error Codes 1S ystem Error Codes 1

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

Location of the main and backup NVM 2-3

IMPORTANT: Three rules for replacing these three service parts 2-3 What to do if the Front Panel is blank 2-3 Continuable and Non-Continuable Error Codes 2-4 System Error Code Brief Descriptions 2-4 System Error Codes - Full Descriptions 2-7 Appendix A: How to troubleshoot SE 79:04 2-33

Possible causes 2-34

Job related SE79:04 2-34 Data related SE79:04 2-35 Network related SE79:04 2- 37 User Interaction related SE79:04 2-37 Random SE79:04: Concurrence issues and memory leaks 2-38 Hardware related SE79:04 2-40 Job related SE79:04 2-34

Troubleshooting based on symptoms 2-41

Front panel displays 79:04 at Start-up 2-41 Front panel displa y s 79:04 during printer operation – not w hile sending jobs 2-42

Front panel displays 79:04 while printing 2-43 Appendix B: Updating firmware in diagnostics boot mode 2-45 Appendix C: Obtaining pr inter logs 2-46

HP Designjet T Series — Service Manual 2-1

System Error Codes

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

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

yo 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.).

Printer logs

When reporting the System Err or Code, make sure that you supply the full Internal 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 understand the system error code. To get the printer logs, see Appendix C: Obtaining printer logs

46.

Code is displayed on the Front Panel.

This is the code definiti on req uir ed when escalating a problem.

on page 2-

It is possible to have the printer log all the activities it performs in a log file. To f urther unders t and a system error code, it is useful to have a log showing the activiti es of the printer at the time when the system error occurred.

2-2 HP Designjet T Series — Service Manual

Replacing the PrintMech PCA, Media Advance Encoder PCA and Formatter

To get printer logs, see Appendix C: Obtaining printer logs on page 2-46.

Replacing the PrintMech PCA, Media Advance Encoder PCA and Formatter

Location of the main and backup NVM

 For T1100/T1100ps/T610 printers, the backup NVM is located in the

Printmech PCA.

 For T1120/T1120ps printers, the backup NVM is located in the Media

Advance Encoder PCA.

 In all T Series printers, the main NVM is located in the Hard Disc Drive.

IMPORTANT: Three rules for replacing these three service parts

 Never inst all a previously used PrintMech PCA (T1100/T1100ps/T610)

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

 Never install a previously used Formatter in any T Series printer.  You MUST NEVER replace both the F ormatter/Hard Disc Drive and the

PrintMech PCA (T1100/T1100ps/T610) or Media Advance Encoder PCA (T1120/T1120ps) at the same time. If both parts need to be replaced, y ou MUS T fir st replace one part and then po wer ON the Pr inter until it completely initializes. Then you can power OFF the Printer and replace the other part.

Failing to follow these simple rules can cause serious problems for the printer. Installing previously used PrintMech PCAs orMedia Advance Encoder PCA can cause the printer to hang up during initialization, affect postcript capabilities, and erase all printer calibrations.

The printer could become unusable.

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 aff ected . See

ONLY) on page 2-10 or 08:YZ (T1120/T1120ps ONLY) on page 2-10.

08:YZ (T1100/T1100ps/T610

HP Designjet T Series — Service Manual 2-3

System Error Codes

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 w ith a Continuable Error Code, an on-site visit should still be planned to troubleshoot the p robl e m.

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 subsys tem 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 stat ion

2-4 HP Designjet T Series — Service Manual

System Error Code Brief Descriptions

Code Component/System

21.1 Service stat ion

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 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 tr acking 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

Web access application

HP Designjet T Series — Service Manual 2-5

System Error Codes

Code Component/System

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 93 Ink Pump ing 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/R econnect/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

Possible for

stomer to

perform

action

2-6 HP Designjet T Series — Service Manual

System Error Codes - Full Descriptions

Code Recovery Action Response

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 16 Add Accessory 17 Escalate 18 Send Plot Again

hp qualified

pers

onnel

assistance

required

Wrong Part Installed

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 before replacing another component. Using this proced ur e y o u w ill be able to de ter mi ne exactly which component failed.

System Error: 01.0:YZ Problem

Description: Corrective Action: Try the following:

Communication with Main PCA failed.

1 Swit c h the Power OFF from the back o f the Pr int er and disconnect the Power

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

cor

2 Remove the formatter and reinsert it again. Ensure that it connects properly

the Main PCA connector.

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

Module Main PCA and PS U (T11 00/T1100ps/T6 10) on page 6-202 or Electroni cs Module Main PCA and PSU (T1120/T1120ps) on page 6-

205.

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

page 6-200.

HP Designjet T Series — Service Manual 2-7

System Error Codes

System Error: 01.1:YZ (T1100/T1100ps/T610 ONLY) Problem

Description: Corrective Action: Try the following:

System Error: Problem

Description: Corrective Action: Try the following:

Error in the Print Mech PCA.

witch the Power OFF from the back of the Pr int er and disconnect the Power

1 S

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

2 If the S

3 If

ystem Err or contin ues, r eplace the Main PCA. See Electr oni cs Module

Main PCA and PSU (T1100/T1100ps/T610) on page 6-202 or Electronics Module Main PCA and PSU (T1120/T1120ps) on page 6-205.

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

6-200.

01.2:YZ

Failure reading acumen chip of an Ink Suppl y Station.

witch the Power OFF from the back of the Pr int er 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. Ink Deliver y System

3 P

(IDS) on page 3-36.

– 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.

5 If the S

ystem Err or contin ues, r eplace the Main PCA. See Electr oni cs Module

Main PCA and PSU (T1100/T1100ps/T610) on page 6-202 or Electronics Module Main PCA and PSU (T1120/T1120ps) on page 6-205.

the Sys tem Er ror continues, replace the Left Ink Supply St ati on. See Left Ink

6 If

Supply Station on page 6-183.

System Error: Problem

Description: Corrective Action: Try the following:

2-8 HP Designjet T Series — Service Manual

02.1 :YZ

Problem with the Carriage PCA.

witch the Power OFF from the back of the Pr int er 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 connec t ed between the Main PCA

3 C

and Carri age PCA.

System Error Codes - Full Descriptions

4 If the Syst em Error continues, replace the Trailing Cable and Carriage PCA

Covers. See

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

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

5 If

(T1100/T1100ps/T610) on page 6-173 or Carriage PCA (T1120/ T1120ps) on page 6-178.

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

6 If the S

7 R

System Error: Problem

Description: Corrective Action: Try the following:

1 S

2 P

3 If

System Error: Problem

Description:

ystem Err or contin ues, r eplace the Main PCA. See Electr oni cs Module

Main PCA and PSU (T1100/T1100ps/T610) on page 6-202 or Electronics Module Main PCA and PSU (T1120/T1120ps) on page 6-205.

eplace the Carri age As s embl y. S ee C arr i age Assembl y (T1100/T1100ps/

T610) on page 6-116 or Carriage Assembl y (T1120/T1120ps) on page 6-

127.

03:YZ

Problem with Power Supply Unit.

witch the Power OFF from the back of the Pr int er and disconnect the Power

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

erform the Electronics Module Test Diagnostic to troubleshoot the problem

further. See

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

Electronics Module Main PCA and PSU (T1100/T1100ps/ T610) on page 6-202 or Electronics Module Main PCA and PSU (T1120/T1120ps) on page 6-205.

3. Electronics Module on page 3-21.

03.0:10

Battery of Real Time Clock ran down.

Corrective Action: Replace the battery:

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

1 T

cables.

oosen the scr e ws that attac h the f ormatter to the pr inter w ith y our f ingers , or

2 L

with the help of a flat screwdriver, and remove the fo rmatter.

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 ma y 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 pr inter on.

7 R

HP Designjet T Series — Service Manual 2-9

System Error Codes

System Error: 06:YZ Problem

Description: Corrective Action: Try the following:

System Error: Problem

Description: Corrective Action: Try the following:

Failure reading/writing NVM in Hard disk.

1 Swit c h the Power OFF from the back o f the Pr int er and disconnect the Power

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

cor

2 If the System Error continues, replace the Formatter. See

6-200.

08:YZ (T1100/T1100ps/T610 ONLY)

No comunication between the F ront Panel and the Main PCA.

1 Swit c h the Power OFF from the back o f the Pr int er and disconnect the Power

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

cor

2 Check that the Front Panel interface cable is

connected between the Main PCA and the Front Panel.

3 Check that the connections between the Formatte r and the Main PCA are

amaged and are correctly connected.

not d

4 If the System Error continues, replace the Formatter. See

6-200.

5 If the System Error continues, replace the Main PCA. See

Assembly on page 6-208.

6 If the System Error continues, replace the Front Panel. See

page 6-47.

Formatter on page

not damaged and is correctly

Formatter on page

Starwheel

Front Panel on

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

08:YZ (T1120/T1120ps ONLY)

can help you troubleshoot a problem when the Front Panel is blank. The follo w ing image sho w s the Power Supply LED , l ooking thr ough the co v er.

2-10 HP Designjet T Series — Service Manual

System Error Codes - Full Descriptions

The following image shows the Formatter LEDs, which sh ould be marked 1, 2, and 3.

Use the following table to interpret the LEDs and find the source o f the problem. Remember that you should read these LEDs when you push the Power button.

Some combinations may require the replacement of two or more components. In this 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.

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

Power supply LED

Off

Formatter 1 LED

Off Off Off Off

On Off Off

*Flashing*

On On Off

On On

Formatter 2 LED

Off Off

*Flashing*

Formatter 3 LED

Off

*Flashing*

Front panel status

Part t o c hange

Power supply

6-205

Page Main PCA

6-205

Page Formatter

6-200

Page Hard Disc Drive

6-200

Page Hard Disc Drive

6-200

Page

1. Formatter Page 6-200

2. Main PCA Page 6-205

Main PCA.

6-205

Page

HP Designjet T Series — Service Manual 2-11

System Error Codes

System Error: 11:YZ

On On On

On On On Off

1. Front Panel Page 6-47

2. Formatter Page 6-200

3. Main PCA Page 6-205

4. Front panel cable Page 6-47

Front Panel

6-47

Page

Problem Description:

Corrective Action: Try the following:

System Error: Problem

Description:

Trailing Cable does not seem to be detected.

1 Swit c h the Power OFF from the back o f the Pr int er and disconnect the Power

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

cor

2 Check that the Trailing Cable is not damaged. 3 Check that the Trailing Cable is correctly connected betwen the Main PCA

Carriage PCA and make sure that the connectors in these boards are

and not damaged.

the System Error continues, replace the Trailing Cable. See

4 If

(T1100/T1100ps/T610) on page 6-102 or Trailing Cable (T1120/ T1120ps) on page 6-109.

5 If the System Error continues, replace the Main PCA. See

Assembly on page 6-208.

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

(T1100/T1100ps/T610) on page 6-173 or Carriage PCA (T1120/ T1120ps) on page 6-178.

21:YZ

Fail moving Service Station.

Trailing Cable

Starwheel

Carriage PCA

Corrective Action: Try the following:

1 Swit c h the Power OFF from the back o f the Pr int er and disconnect the Power

d. Check the Primer T ube s . Reconnect the pow e r cord and pow er On the

cor Printer.

2 Mak

3 P

2-12 HP Designjet T Series — Service Manual

e sure that the Service Station path is clear. Remove any visible

stacles (e.g. screws, plastic parts, etc...) restricting the movement of the

Service Station.

erform the Service Station diagnosti c test to troubles hoot the problem

rther. See

8. Service Station on page 3-42.

System Error Codes - Full Descriptions

4 If the System Er r or continues, r eplace the Service Stati on. See Service Station

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

5 If the System Err or continues, replace the PrintMech PCA. See

PCA (T1100, T1100ps, T610 ONLY) on page 6-73.

PrintMech

System Error: Problem

Description: Corrective Action: Try the following:

Warning: Problem

Description:

21.1:YZ

Fail moving the Primer Motor of the Servi c e Station.

1 Remov e the Ri ght Cov er and mak e sure the cable s fr om the Printmec h PCA to

the Ser T610 ONLY).

2 P

3 If the System Er ro r continues, r eplace the Service Stati on. See

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

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

PCA (T1100, T1100ps, T610 ONLY) on page 6-73.

vice Station are connected and are not damaged (T1100/T1100ps/

erform the Service Station diagnosti c test to troubles hoot the problem

rther. See

8. Service Station on page 3-42.

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.

Service Station

PrintMech

01 2 3 4 5

Left Ink Supplies

Corrective Action: Try the following:

 Replace the Left Ink Supply St ation . See Le ft Ink Suppl y Stati on on page 6-

183.

System Error: Problem

Description: Corrective Action: Try the following:

HP Designjet T Series — Service Manual 2-13

22.0:YZ

Left Ink Supply Station error.

1 Swit c h the Power OFF from the back o f the Pr int er and disconnect the Power

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

cor

System Error Codes

2 Check that the cables between the L eft Ink Supply St ation and Main PCA the

are not damaged and are correctly connected.

erform the Ink Delivery System diagnostic test to troubleshoot the problem

3 P

further. See

7. Ink Delivery System (IDS) on page 3-36.

4 If the S

5 If the S

System Error: Problem

Description: Corrective Action: Try the following:

1 S

2 C

3 P

4 If the S

5 If

ystem Err or contin ues , replace the Left Ink Supply S tation. See Left Ink

Supply Station on page 6-183.

ystem Err or contin ues, r eplace the Main PCA. See Electr oni cs Module

Main PCA and PSU (T1100/T1100ps/T610) on page 6-202 or Electronics Module Main PCA and PSU (T1120/T1120ps) on page 6-205.

22.1:YZ

Left Ink Supply Station error.

witch the Power OFF from the back of the Pr int er and disconnect the Power

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

heck that the cables between the Le ft Ink Supply Stati on and Main PCA the

are not damaged and are correctly connected.

erform the Ink Delivery System diagnostic test to troubleshoot the problem

further. See

Supply Station on page 6-183.

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

Assembly on page 6-208.

7. Ink Delivery System (IDS) on page 3-36.

ystem Err or contin ues , replace the Left Ink Supply S tation. See Left Ink

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 Pr int er and disconnect the Power

1 S

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

erform the Ink Deliv ery System diagnostic test in order to check that the

2 P

bongos (pushers) go up and do w n to pr es surize ink in the tubes and the Out of Ink sensors work proper ly. See

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

3 T 4 If the di

printer and try purging the Ink Supply Tubes again. It could be that one of the cartridges is defective.

5 If

(T1100/T1100ps/T610) on page 6-187 or Ink Supply Tubes (T1120/ T1120ps) on page 6-193.

agnostic test does not f ind any problem , inst all new cartridges in the

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

7. Ink Delivery System (IDS) on page 3-36.

2-14 HP Designjet T Series — Service Manual

System Error: 31:02

System Error Codes - Full Descriptions

Problem Description:

Corrective Action: Try the following:

System Error: Problem

Description: Corrective Action: Try the following:

System Error: Problem

Description:

An error has been detected with the cutter.

witch the Power OFF from the back of the Pr int er and disconnect the Power

1 S

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

2 Chec 3 R

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

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

31:03

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

witch the Power OFF from the back of the Pr int er 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:

41:YZ

Electrical fault or current limit in Media-Axis Motor.

witch the Power OFF from the back of the Pr int er and disconnect the Power

1 S

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

2 Op

3 P

4 If

5 C

6 R

en the Window and check for any visible obstacles restricting the movement of the Media Ad vance R oller. If ther e is a wr inkled mass of medi a inside the paper path, lift the P inch wheels (using Media L ev er) and clear the obstruction.

erform the Paper Dri ve diagnostic test to troubleshoot the problem furthe.

2. Paper Drive on page 3-18.

See

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

Rewinder on page 3-34.

heck that the Media Adv ance Drive cable is not damaged and is correctly

connected to the Main PCA.

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

218.

HP Designjet T Series — Service Manual 2-15

System Error Codes

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

Assembly on page 6-208.

System Error: Problem

Description: Corrective Action: Try the following:

41.1:YZ

Electrical fault or current limit in Media-Axis Motor.

witch the Power OFF from the back of the Pr int er and disconnect the Power

1 S

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

2 Op

3 P

4 If

5 C

6 R

7 If

en the Window and check for any visible obstacles restricting the movement of the Media Ad vance R oller. If ther e is a wr inkled mass of medi a inside the paper path, lift the P inch w heels (using Media Le ver) and c lear the obstruction.

erform the Paper Drive diagnosti c t est to troubleshoot the problem furthe.

2. Paper Drive on page 3-18.

See

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

Rewinder on page 3-34.

heck that the Media Adv ance Drive cable is not damaged and is cor rectly

connected to the Main PCA.

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

218.

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

Assembly on page 6-208.

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:

42:YZ

Scan-Axis Motor failure (likely due to fr i cti on or obs tacle s in the media path).

witch the Power OFF from the back of the Pr int er and disconnect the Power

1 S

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

2 Op

3 P

4 C

en the Window and check for any visible obstacles restricting the movement of the Media Ad vance R oller. If ther e is a wr inkled mass of medi a inside the paper path, lift the P inch w heels (using Media Le ver) and c lear the obstruction.

erform the Scan Axis di agnostic test to tr oubleshoot the pr oblem further . See

1. Scan Axis on page 3-6.

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

2-16 HP Designjet T Series — Service Manual

System Error Codes - Full Descriptions

5 Perform the Service Station diagnostic test to troubleshoot the problem

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 Scan-Axis Motor (T1100/T1100ps/

7 R

T610) on page 6-142 or Scan-Axis Motor (T1120/T1120ps) on page 6-

146.

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

8 If

PCA (T1100, T1100ps, T610 ONLY) on page 6-73.

8. Service Station on page 3-42.

System Error: Problem

Description:

Corrective Action: Try the following:

44:YZ (T1100/T1100ps/T610 ONLY)

The 44:10 system er ror si gnifies an electr ical err or with the A erosol F an, 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 Pr int er and disconnect the Power

2 S

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

heck that the Aero sol F an cable is not damaged and is correctl y 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 Ser

ies printers do not include an Aerosol Fan.

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

playing 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 r ear 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 serv ice kit inc

luding fw 6 or superior) HP Designjet T610 Printer: Q6711-60024 (or any formatter service kit

inc

luding fw 6 or superior)

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

standard troubleshooting procedure above.

HP Designjet T Series — Service Manual 2-17

System Error Codes

System Error: 45:YZ Problem

Description: Corrective Action: Try the following:

System Error: Problem

Description: Corrective Action: Try the following:

An error with the Rewinder System has been detected.

witch the Power OFF from the back of the Pr int er and disconnect the Power

1 S

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

heck that the Re winder cable is not damaged and is corr ectly connec ted to

2 C

the PrintMech PCA.

3 Chec

4 P

5 R

6 If

k that the Right Spindle Holder (r ew inder included) is corr ectly attached

to and aligned with the Right Cover.

erform the Re w inder diagnost ic test t o trou bleshoot the pr oblem further. See

6. Rewinder on page 3-34.

eplace the Right Spindle Holder (rewinder included). See Right Spindle

Holder and Rewinder (T1120/T1120ps) on page 6-87 or Right Spindle Holder and Rewinder (T1120/T1120ps) on page 6-87.

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

PCA (T1100, T1100ps, T610 ONLY) on page 6-73.

47:03

Star wheels motor error.

 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 Pr int er 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.

3 Op

4 P

5 R 6 If

en the Window and check for any visible obstacles restricting the

movement of the Starwheel Assembly, then clear the obstruction.

erform the Scan Axis Starwheel diagnostic test to troubleshoot the problem

further. See

eplace the Starwheel Motor. See Starwheel Motor on page 6-245.

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

Assembly on page 6-208.

Star Wheel Lifter test on page 3-7.

2-18 HP Designjet T Series — Service Manual

System Error: 48:YZ

System Error Codes - Full Descriptions

Problem Description:

Corrective Action: Try the following:

System Error:

PPS system fail ure.

witch the Power OFF from the back of the Pr int er and disconnect the Power

1 S

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

heck that the P en to Paper Space (PPS) Solenoid ca ble is not damaged and

2 C

is correctly connected to the PrintMech PCA.

erform the Scan Ax is PRS di agnostic tes t to trouble shoot the problem f urther .

3 P

PRS Test on page 3-9.

See

4 Mak

5 R

6 If

e sure the Service S tation is cor r ectl y installed . So metimes, if the S ervi ce Station is not correctly installed, the front of the Service Station falls down (causing the Service S tation to be tilted), and the L-Bracket support does not fit properl y. The front of the Service St ation 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 t o Paper Space (PPS) Solenoid (T1120/T1120ps) on page 6-77.

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

PCA (T1100, T1100ps, T610 ONLY) on page 6-73.

51:YZ

Problem Description:

Corrective Action: Try the following:

System Error: Problem

Description: Corrective Action: Try the following:

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 Pr int er 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

heck that the Service Station cable is not damaged and is correctly

4 C

connected to the PrintMech PCA.

HP Designjet T Series — Service Manual 2-19

System Error Codes

5 Replace the Drop Detector. See Drop Detector on page 6-69.

eset the Calibr ation 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 Pr int er 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 L ine Sens or (T1100/T1100p s/T610) on page

4 R

6-152 or Line Sensor (T1120/T1120ps) on page 6-157.

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

5 If

(T1100/T1100ps/T610) on page 6-173 or Carriage PCA (T1120/ T1120ps) on page 6-178.

56:YZ

Drive roller analog encoder sensor fail or calibration failed.

witch the Power OFF from the back of the Pr int er and disconnect the Power

1 S

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

erform the Media P ath T es t to trou bleshoot the problem f urther . See 2 . P aper

2 P

Drive on page 3-18.

eplace the Encoder Disk and Encoder Sensor. See Encoder Disk and

3 R

Encoder Sensor on page 6-216.

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

4 If

Assembly on page 6-208.

System Error: Problem

Description:

Corrective Action: Try the following:

2-20 HP Designjet T Series — Service Manual

58:YZ

The Line Sensor of the printer is not functi oning 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 corr ectly, or the firmware is not compatible with the Line Sensor.

witch the Power OFF from the bac k o f the Pr inter and disconnect the power

1 S

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

erform the Line Sensor calibration.

2 P

System Error Codes - Full Descriptions

3 Check that the Printer has the late st Firmware version. If not, update the

Firmware to the latest version.

4 Perform the Carriage Test to troubleshoot the problem further. See 4.

Carriage Assembly on page 3-26.

the System Error continues, replace the Line Sensor. See Line S ensor

5 If

(T1100/T1100ps/T610) on page 6-152 or Line Sensor (T1120/T1120ps) on page 6-157.

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 Pr int er and disconnect the Power

1 S

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

2 Chec 3 R 4 C

5 T

6 T

k the graphic language setting of the Printer (Refer to the User's Guide).

esend the file to the printer.

heck that the Printer has the latest Firmware version. If not, update the

Firmware to the latest version.

he P o stScript™ fonts are mis sing. Upgrading the Firmware will re-install the

fonts.

he file cannot be printed because it is pas sword protected. Resend the file

without password protection.

63:YZ

Input/Output problem through the network interface of the Formatter.

witch the Power OFF from the back of the Pr int er 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

6-200.

System Error: Problem

Description: Corrective Action: Try the following:

HP Designjet T Series — Service Manual 2-21

64:YZ

Input/Output problem through the USB Port.

witch the Power OFF from the back of the Pr int er 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

System Error Codes

3 Check that the Printer has the late st Firmware version. If not, update the

Firmware to the latest version.

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

4 If

6-200.

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 erro r.

witch the Power OFF from the back of the Pr int er 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

6-200.

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

5 If

Assembly on page 6-208.

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:

2-22 HP Designjet T Series — Service Manual

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

8MB. If the amount of memory that the printer needs to proce s s the f ile 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 memo ry is the amount of memory that the prin ter 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 vari ables such as the resolution, file size and file content.

 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 layer s. An y print j ob that contains these type of images can r esult in a display list memory greater than 128MB.

Corrective Action: Try the following:

1 It is r

2 It is also recommended that you upgrade the firmware to the latest version

3 Decrease the print resolution to 300 dpi

ecommended that you remo ve an y unnecessary file s fr om the Hard Disk

ive of the Formatter using the Web Server.

vailable at www.hp.com.

If the customer does not accept the print quality after reducing the resolution or using Econofast printmode, proceed to the workaround in step 4.

 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.

System Error Codes - Full Descriptions

4 Use ‘Econofast’ printmode. The rendering resolution will be selected by

default to 300 dpi. From the Printint Pre ferences pane, select custom

HP Designjet T Series — Service Manual 2-23

System Error Codes

options and then settings. In the Custom Print Quality Options pane, select Economode.

If the Out of Memory message still persists, proceed to the next workaround.

5 Out of Memory issues can alway s be so l v ed if the pr oces sing of the j ob can

be performed before reaching the printer. This can be done by selecting ‘Send Job as Bitmap’. The main processing o f the print job will then be performed by the computer. This means that more computer resources can be used to process the plot . This fo rm of prin ting is recommended i n the case where the pr int j ob contains raster images plots, and mixed plots wi th 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 si ze.

2-24 HP Designjet T Series — Service Manual

System Error: 71:19

For T1100/T1100ps/T610 printers, the backup NVM is located in the Printmech PCA.

For T1120/T1120ps printers, the backup NVM is located in the Media Advance Encoder PCA.

In all T Series printers, the main NVM is located in the Formatter service part.

You MUST NEVER replace both the Formatter and the PrintMech PCA (T1100/T1100ps/T610) or Media Advance Encoder PCA (T1120/T1120ps) at the same time. If both parts need to be replaced, you MUST first re place one part and then power ON the Printer until it completely initializes. Then you can power OFF the Printer and replace the other part.

Never install a previously used PrintMech PCA (T1100/ T1100ps/T610) or Media Advance Encoder PCA (T1120/ T1120ps) into another printer.

System Error Codes - Full Descriptions

Problem Description:

Corrective action: Try the following:

Default Serial Number found in the main and backup NVM. It seems that both the Formatter and PrintMech PCA (T1100/T1100p s/

T61

0) or Media Advance Encoder PCA (T1120/T1120ps) have been replaced together, or a previously used Printmech PCA or Media Advance Encoder PCA was installed.

 Perform the Error 71:19 Recovery Service Utility. See 13. Error 71:19

Recovery on page 3-51.

More inf

ormation:

Unauthorized upgrades

To prevent unauthorized upgrades of printers to a super ior model, the new f

irmware has changed the initialization process of the printer.

Location of the Serial and Product numbers

The serial number and the product number information is stored in two

ations, in the EEROM of the Printmech and the EEROM of the Formatter.

loc

Old initialization process

1 In the

2 T

previous initialization of the printer, the serial numbers and product numbers were compared in the EEROM of the PrintMech PCA (T1100/ T1100ps/T610) or Media Advance Encoder PCA (T1120/T11 20ps) and the ERROM of the Formatter. If there was a difference, the printer displayed SE 71:19.

he 71:19 recovery procedure could then be performed. This enabled anyone to do one of the following, possibly resulting in an unauthor ized upgrade:

 Input a serial number and product number into the PrintMech PCA

(T1100/T1100ps/T610) or Media Advance Encoder PCA (T1120/

HP Designjet T Series — Service Manual 2-25

System Error Codes

T1120ps) and Formatter EEROM.

 Choose whic h EER OM held the cor r ec t inf ormati on , and cop y it across to

the other EEROM.

New initialization process

From firmware 7.x.x.x onwards, the information is now always copied

utomatically from the EEROM in the PrintMech PCA (T1100/T1100ps/

a T610) or Media Advance Encoder PCA (T1120/T1120ps) to the EEEROM in the Formatter.

This means that the printer will now take on all the attributes of the

formation located in the PrintMech PCA (T1100/T1100ps/T610) or

in Media Advance Encoder P C A (T1120/T1120ps), possibly rendering the printer unusa ble. The following ar e j u st a f ew ex ample s o f w hy this could be possible.

 The printer may not be able to fully initialize if there is a mismatch

between the size of the printer and the size in the EER OM of the PrintMech PCA (T1100/T1100ps/T610) or Media Advance Encoder PCA (T1120/T1120ps).

 The PostScript capabilities of the printer could be affected.  All the calibrations applied from the factory will be copied, so incorrect

calibrations could be applied to the printer.

How to resolve ser ial/product number errors

Any issue will need to be escalated thr ough your local support organizati on

 A reused PrintMech PCA (T1100/T1100ps/T610) or Media Advance

Encoder PCA (T1120/T1120ps) has been accidentally installed

 Both the PrintMech PCA (T1100/T1100ps/T610) or Media Advance

Encoder PCA (T1120/T1120ps) and the Formatter have been installed at the same time in error.

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 4-15.

 0x07090002 (LS2K). Perform the Line Sensor Calibration. See Line

Sensor Calibration on page 4-15.

 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 1-49.

 0x07090008 (Analog Encoder). P erf orm the Paper Advance Calibration .

Paper Advance Calibration on page 4-6.

See

2-26 HP Designjet T Series — Service Manual

System Error: 73:YZ

System Error Codes - Full Descriptions

Problem Description:

Corrective Action: Try the following:

System Error: Problem

Description: Corrective Action: Try the following:

Servo Error.

witch the Power OFF from the back of the Pr int er 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. Scan

3 P

Axis on page 3-6.

the Sys tem Error continues, perform the Media Drive diagno stic test to

4 If

troubleshoot the problem further. See

74:YZ

Error uploading firmware update file.

witch the Power OFF from the back of the Pr int er 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.

2. Pap er Drive on page 3-18.

System Error: Problem

Description: Corrective Action: Try the following:

System Error: Problem

Description: Corrective Action: Try the following:

74.1:YZ

Error uploading media profile update file.

witch the Power OFF from the back of the Pr int er 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.

75.21:YZ

The spittoons (Le ft Spittoon, Service Station) have reached 80% capacity.

 Use Prev enti ve Maintenance K it #2 to replace the Le ft Spitton and Servi ce

Station.

HP Designjet T Series — Service Manual 2-27

System Error: 75.22:YZ

System Error Codes - Full Descriptions

Problem Description:

Corrective Action: Try the following:

The spittoons (Left Spittoon, Service Station) are full.

 Use Prev enti ve Maintenance K it #2 to replace the Le ft Spitton and Servi ce

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.

System Error: Problem

Description: Corrective Action: Try the following:

77:YZ

Web access application. The web server is not functioning correctly.

witch the Power OFF from the back of the Pr int er 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.

System Error: Problem

Description: Corrective Action: Try the following:

System Error: Problem

Description: Corrective Action: Try the following:

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.

witch the Power OFF from the back of the Pr int er 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.

date the OMES.

3 Up

HP Designjet T Series — Service Manual 2-28

System Error: 79:YZ

System Error Codes - Full Descriptions

Problem Description:

Corrective Action: Try the following:

System Error: 79.1:YZ Problem

Description: Corrective Action: Try the following:

System Error:

Generic Firmware error.

1 Swit c h the Power OFF from the back o f the Pr int er and disconnect the Power

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

cor

2 Check that the Printer has the late st Firmware version. If not, update the

irmware to the latest version.

If you see sy stem error 79:04, see Appendix A: How to

troubleshoot SE 79:04 on page 2 -33.

Recoverable firmware error that does not stop the printing process.

1 Swit c h the Power OFF from the back o f the Pr int er and disconnect the Power

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

cor

2 Check that the Printer has the late st Firmware version. If not, update the

irmware to the latest version.

81:YZ

Initial checks: T his error can occu r because the printer has been dropped during

transportation, cau sing struc tur al damage . Bef or e contin uing w ith the 81:YZ troubleshooting , first look for structural damage.

To i dentify the stru ctural damage, look for the following three things:

 Consistent 81:YZ error codes.  Platen fingers rubbing on the roller surface, leaving black marks on the

HP Designjet T Series — Service Manual 2-29

System Error Codes - Full Descriptions

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 the chassis is damaged and the unit cannot be repaired.

sid

Problem Description:

Corrective Action: Try the following:

HP Designjet T Series — Service Manual 2-30

Problem with paper advance. This source of error could come from an error in any of the follo wing systems: paper motor, disk encoder, cables or main electronics .

1 Open the Window and check for any visible obstacles restricting the

vement of the Drive Roller. If there is a wrinkled mass of media inside the

mo paper path, lift the Pinchwheels (using the Media Lever) and clear the obstruction.

System Error Codes - Full Descriptions

2 Perform the Media Drive diagnostic test to troubleshoot the problem further.

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 f urther. See

Rewinder on page 3-34.

4 Chec

5 A

6 If the S

System Error: Problem

Description: Corrective Action: Try the following:

1 S

2 If

System Error: Problem

Description: Corrective Action: Try the following:

1 P

k the connections on the Main PCA; the Media Advance Drive is

connected to the connector labeled Paper Motor.

djust the encoder disc and motor mount configuration using the Media Advance Drive installation instructions. See

6-218.

ystem Error continues, replace the Media Advance Drive. See Media

Advance Drive on page 6-218.

84:YZ

Back tension servo shutdown (roll feeding).

witch the Power OFF from the back of the Pr int er and disconnect the Power

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

the problem persists, contact HP support.

85:YZ

Problem finding the Drive Roller zero.

erform the Media Drive diagnos t ic test to troubleshoot the problem further.

2. Paper Drive on page 3-18.

See

Media Advance Drive on page

2 If the S

System Error: Problem

Description: Corrective Action: Try the following:

1 S

2 Op

HP Designjet T Series — Service Manual 2-31

ystem Err or continue s , r eplace the Encoder Disk and Encoder Sensor.

Encoder Disk and Encoder Sensor on page 6-216.

See

86:YZ

Possible Paper Jam.

witch the Power OFF from the back of the Pr int er and disconnect the Power

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

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

System Error Codes

System Error: 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 attachment nut

3 R

(T1100/T1100ps/T610) on page 6-96 or Encoder Strip, spring and attachment nut (T1120/T1120ps) on page 6-99.

eplace the Carriage PCA. See Carr iage P CA (T1100/T1100ps/T610) on

4 R

page 6-173 or Carriage PCA (T1120/T1120ps) on page 6-178.

eplace the Tr ailing Cables . See T railing Ca ble (T1100/T1100ps/T610) on

5 R

page 6-102 or Trailing Cable (T1120/T1120ps) 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 Pr int er 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

eplace the Left Ink Supply Station, depending on the results of the

3 R

diagnostic test. See

7. Ink Delivery System (IDS) on page 3-36.

Left Ink Supply Stati on on page 6-183.

fter replacing the L eft Ink Suppl y Stati on , if the problem per sists r eplace the

4 A

Main PCA. See

T610) on page 6-202 or Electronics Module Main PCA and PSU (T1120/ T1120ps) on page 6-205.

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 ha s Problems Detecting Media on page 1-5.

the System Error continues, replace the Line Sensor. See Line S ensor

3 If

(T1100/T1100ps/T610) on page 6-15 2 or Line Sensor (T112 0/T1120ps) on page 6-157.

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

4 If

(T1100/T1100ps/T610) on page 6-173 or Carriage PCA (T1120/ T1120ps) on page 6-178.

Electronics Module Main PCA and PSU (T1100/T1100ps/

2-32 HP Designjet T Series — Service Manual

Appendix A: How to troubleshoot SE 79:04

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

6-200.

System Error: Problem

Description: Corrective Action: Try the following:

System Error: Problem

Description: Corrective Action:

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

The Line Sensor has Problems Detecting Media on page 1-5.

the System Error continues, replace the Line Sensor. See Line S ensor

(T1100/T1100ps/T610) on page 6-152 or Line Sensor (T1120/T1120ps) on page 6-157.

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

(T1100/T1100ps/T610) on page 6-173 or Carriage PCA (T1120/ T1120ps) on page 6-178.

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

6-200.

98:YZ

Automatic backup print mode enabled. Try the following:

1 S

witch the Power OFF from the back of the Pr int er and disconnect the Power

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

 Recover the printheads.

Appendix A: How to troubleshoot SE 79:04

Introduction

The System error 79:04 is a g e neric firmware error (equivalent to a blue screen in Windows). It’s the Sys tem Error that the printer will display when an unknown e xception occurs that cannot be pointed to by any specific subsystem of the printer.

Since this is a generic error, there can be m document will cover the most probable causes behind a system error 79:04 and will recommend the most effic ient troubleshooting steps to resolve customer issu es.

HP Designjet T Series — Service Manual 2-33

ultiple causes behind it. This

Possible causes

Appendix A: How to troubleshoot SE 79:04

One important point to mention is that, although 7 9 :04 s y stem er r ors can be caused by a hardware malfunction, the vast majority of 79:04 sy stem err ors 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 se lection, updating the printer’s firmware/software that is being used or by fixing an error in the code).

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 pr int j ob that is not correctly f ormatted f or the pr int er or that is not

rectly processed by it can trigger a 7 9:04 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 b y a print job always have the same symptoms:

he job is recei ved by the printer and starts to process.

1 T 2 In the 3 T

4 A 5 If

middle of the processing, the printer stop s and displays 79:04.

he printer will display the 79:04 system error again immediately after reboot . T his is due t o the f act that the pr inter 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

These types of 79:04 system errors are normally caused by jobs that have been gener exported by an applicati on to P S, P DF, HP-GL/2 , RTL , … or an y other f ormat 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 rul can generate their own PS code (Adobe PhotoShop, Adobe Illustrator, Adobe Acrobat, Corel Draw, Freehand, QuarkXpress, …). When used with a PS dri ver, these applications generate the output PS themsel ves, instead of using the driver’s rendering capabilities. This is known as PostScript passthrough. So , w hen using an HP PostScript dri ver together with an appli cation that has PS passthrough capabilities , the PS code that comes into the pr inter 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.

ated by 3rd party applications (RIPs, 3rd party drivers, files

e: there are certain appli cati ons that

HP Designjet T Series — Service Manual 2-34

Appendix A: How to troubleshoot SE 79:04

Solutions and workarounds

When a job consistently gener ate s a 79:04 s y s tem er r or, it is either because of a issue in the printer’s firmware or because of a defect in the job itself (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, ther e are a set of workarounds and short term solut ions that can be

ested in order to get the customer up and running in the shortest possible

t time:

1 Send the

caused by a combination of the job contents combined with some specific setting(s).

the customer is sending the file directly to the pr inter, try using the HP

2 If

driver instead.

the issue is occurring when printing through the HP PostScript driver from

3 If

an application with PS passthr ough, try changing the options in the application so that it pr ints PS as rast er (the opti on is ty p i call y locat ed in the “Advanced” options of the application’s printing dialog).

Data related SE79:04

HP Designjet printers have Hard Disks and non volatile memories that cont examples include:

job using a variety of different settings. Many times, the issue is

ain data bases and files that can be modified with user data. Some

 The printer’s queue  The hard drive partitions that contain user job s  The data base that stores the printer settings  The data base that stores accounting information

Some of this data is accessed b y the print accessed as needed.

If any of this fields contains corrupt data or data with characters or values that cannot be cor occur.

rectly processed by the printer, a 79:04 system error may

er at start up, and some others ar e

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

witching the printer off and on again wil l not s ol v e the i ssue. The pr in ter

b S

will continue displaying the 79:04 s ystem error until the corrupt data has been cleared through a s ervice procedure

hen the corrupt data is accessed during normal printer operation

2 W

he printer will st art up normally

a T

hen the data is ac ces s ed (for example w hil e pr i nt ing , while navigating

b W

the queue or when changing some settings), the printer display s a 79:04 system error

HP Designjet T Series — Service Manual 2-35

System Error Codes

c The printer can reboot normally

hen the data is accessed again (typically, under the same conditions

d W

as in step “b”), the 79:04 system error is displayed again

Solutions and workarounds

Many times, data r elated 79:04 errors are resolved by means of hardware

ervention. Since data is stored in physical components (RAM, EEROM

int 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 av ailable in the printer:

a Delet b R a Delet

2 If s

additional information that could be causing the issue:

e all jobs from the queue (from the Front Panel or the EWS)

eset to factory defaults to c lear the user ’s confi gur ations and calibr atio ns

e 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

a S

erform an EEROM reset

b P

step 2 did not resolve the issue, it is possible to completely clear the

3 If

information on the Hard Disk and the diff erent EEROMs, leaving them in an equivalent st ate to a new part:

ccess the Service Utilitie s Menu

a A

the Secure Disk Wipe menu, set the Sanitize level to “Unsecure mode”

b In

ecute the Disk Wipe. This takes 45-75 minutes and it will complete ly

c Ex

clear all partitions in the Hard Disk which contain user data, including the partition where the Operating Sys tem is installed. After the disk wipe has completed, a backup firmwar e v er sion will aut omati cally be installed from a backup partition to allo w the unit to s tart up . T his f irm w ar e v er sio n is very old.

he firmware in the printer should be u pgraded 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

solved.

Important note:

It is possible that the corrupt data came to be in the printer as a

onsequence of some activity in the customer’s workflow. In this case, it is

c possible that the issue will ha ppen again . In thes e case s, it is v ery important to understand the sequence of events in the customer’s workflow that led to the error occur ring. Once the err or can be traced in the c ustomer’s w orkflo w , escalate the issue to the GBU (through the GCC). This is done to implement any changes in the pr inte r’s f ir m war e that can pr ev ent the se is sues occ ur r ing again.

2-36 HP Designjet T Series — Service Manual

Appendix A: How to troubleshoot SE 79:04

Network related SE79:04

Most HP Designjet printers have built-in networking capabilities. Network settings can be set manually, but in the majority of cases, they are obtained automatically from the printer. These settings include many different fields, such as IP address and subnet ma sk, 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 inte rpr et ed incorr ec tl y, 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 term solutions and workarounds can 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 Net

that you are not using, including IPv6, SNMP and WebServices.

step “2” does not work, try setting a manual configuration of the device:

3 If

a Ent b In c Do not s

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 expect ed when a certain set of conditi it may simple display a 79:04 system error and force a reboot. Some examples (not real) that can help to illustrate this:

work confi guration menu in the Front Panel, disable any protocols

er the correct subnet mask and an IP in the valid range

the GateWay field, set the same value as in the IP address fi eld

et a host name or a domain name

ons coinci de. In these cases, if the printer doesn’t know how to react,

 An error occ urs w hen a job is cancelled when it is at the “F inishing print ”

state and when the queue is disabled

 An erro r occur s if the Windo w is opened w hile the pr inter is c hecking the

printheads

HP Designjet T Series — Service Manual 2-37

Appendix A: How to troubleshoot SE 79:04

These errors will most likely only happen in very specific corner cases that have not been identified during the development or the qualification o f the printer, so normally, the y do not se v er ely impac t the cus tomer, as they do not affect their regular working flows.

Symptoms

The sym ptoms here are as numerous as the number of possible interacti ons bet

ween the user and the printer. In any case, it’s possible to identify the steps that caused the error to oc cur 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 err or wa s display ed. Ac tions the user ha s 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 thes e cases is to identify the pr e v iou s steps

used the error and:

that ca

scalate the issue to the GBU through the GCC in order to ha ve it correct ed

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 7 9:04 err ors ha ppen randomly w hen the print er is being heav ily 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

will need. After the execution is complete, the allocated memory is freed

to be used by other programs. If the allocation or the r elease 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 progressi vely full (since it is

not properly f reed). When the leak becomes too big, the pr inter 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 e x ecuti ons of the same pr ogr am (w hat is

known as multiple threads). Access to these resources must be correctly

controlled to prevent unexpec t ed behavior. Issues caused by an incorrect

control of these resources are concurrence issues. In the following you have a simple example: let’s imagine that there is a

er that controls the communication between the JetDirect card and the

count printer’s firmware. Whenever a new packet of information is sent by the JetDirect card to the pr inter, the counter increases. When the pr inter r ecei v es the packet and pr ocesses it correc tly , the counter dec reases . Another process

HP Designjet T Series — Service Manual 2-38

Appendix A: How to troubleshoot SE 79:04

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 gr ows too big, it may mean that there is a bottleneck somew her e and ma y be the JetDir ec t car d thr o ughput is dec r eas ed to co ntr ol 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 prepar e to handle this, it ma y happen that the JetDirect cannot increase the counter becau se the printer is w r iting 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 w ill not be prepared to react to a negati v e v alue and w il l launch an exception that will trigger a 79:04 system error.

Symptoms

This type of 79:04 al wa y s occ ur s in heavy load conditions , so the symptoms w

ill always be similar to this pattern:

 A printer that is being heavily used (printing a projec t 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 r eboot. And a f ile that has been print ed without issue s

several times can trigger the error in the future.

 This error is very dependant of the workflow the customer has. The most

common user workf lows have been extensively tested both b y HP and by

our beta sites, so it is highly unlikely to see random 79:04 issues in these

cases. These random is sues tend to occur in very specific corner cases,

and cannot be reproduced unless the exact conditions of the workflow

are replicated. They normally happen when sending files generated by

external applications (RIPs, 3rd party drivers, etc.)

Workarounds and solutions

Random 7 9 :04 er r ors ar e , b y far, the most complex ones to diagnose and to

ix. The only solutions avai lable in these cases are:

dentify the root cause (either in the files or in the firmware) and fix it in the

1 I

code, which req uires the intervention of the GBU

est any options available to modify the customer’s workflow and see if any

2 T

combination of th em solves the issue In both cases, a profound understanding of the customer’s workflow is

nece

ssary. In particular, the information that is needed is:

 Printer front panel settings  Application that is being used; RIP or driver that is being used

HP Designjet T Series — Service Manual 2-39

System Error Codes

 Application/RIP/Driver settings  Type of output files this application, RIP or driver is generating  Some sample files that are representative of what the customer is using  Operating System  Method of connection to the printer

A descripti on of the normal flow when the issue occurs and the typical

requency of occurrence (i.e. once every hour when sending non stop

f several files, each of them with multiple copies)

With this information, the environment can be replicated in order to try and f

ind workarounds. This is also the information that will be needed at the

GBU to inv estigate and fix the root cause of this issue once it is e scalated.

Hardware related SE79:04

Hardware is, by far, the least likely cause of a 79:04 system error. Replacing

dware components does not nor mally fi x the issue and incr eases the total

har turn around time in finding a workable solution.

In some cases, a failure in a component in the printer’s electronics may cau

se a 79 :04 s y stem er r or, since the printer’s electronics are in vo lv ed in the execution of the firmware and the processing of jobs. It needs to be noted, however, that hardware failures in the electronics tend to produce specific system errors that point directly to the component that is failing.

Some HW causes that could be behind a 79:04 error are:

 Defecti ve clusters in the Hard Disk drive. If these clusters are used to

execute the firmware or to process a job, they may produce a 79:04. It needs to be noted however, that most 79:04 errors that are resolved by an HDD replacement are in fact, data related 79:04 that could have been solved mor e efficiently and quickly following the steps in Section 3.

 Defective memory segments. If the RAM memory has some defective

segments, a 79:04 may occur when these segments are used.

 Intermittent defects in the electronic components that are involved in the

processing of a job: Carriage PCA, Trailing cable, Formatter and Print Mech. This is a highly unlikely cause, since defects in these components will produce subsystem specific errors.

Symptoms

There’s no single set of sym ptoms behind hardware related 79:04 system

rrors. The most usual ones, however are:

 79:04 during start up. Rebooting the printer may or may not solve the

problem

 79:04 while processing or printing a job. Rebooting the printer and

printing the same job does not always produce the error.

Solutions and workarounds

In the following procedure perform each step as it appears in the list and

nly move on to the next step once you are sure the 79:04 error has not

o been cleared:

eboot the printer in Diagnostics Boot mode and execute the servi ce t ests to

1 R

validate the functionality of all the electronics components

2-40 HP Designjet T Series — Service Manual

HP Designjet T1120, Designjet T1100, Designjet T610 service manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents 1

Using this Manual

Purpose

Readership

Part Numbers

Conventions

Troubleshooting 1

Using the Front Panel

Key Function

Service Key Combinations

General Troubleshooting

Introduction

Troubleshooting System Error Codes

Performing a Service Test on a failed Assembly

Performing the Necessary Service Calibrations

Solving Print Quality Problems

The Front Panel is blank

The Printer does not Power ON

The Printer Continuously Rejects Printheads

Cover Sensors are not Working

The Line Sensor has Problems Detecting Media

Troubleshooting Media Jams/Printhead Crashes

Banding at variable extreme environmental conditions

Worm marks on HP Coated media with light area fills

The Media Basket was damaged during printer setup

Solving Media-Handling Problems

Print quality troubleshooting

Print Quality Troubleshooting Actions

The Service Image Quality Diagnostic Print

What is the Service Image Quality Diagnostic Print?

Considerations for Printing the Diagnostic Print

Printing the Diagnostic Print

Reading the Diagnostic Print Results

Diagnostic Part 1: Printhead Reliability

Corrective Action

Corrective Action

Diagnostic Part 3: Printheads & Paper Advance

Banding

Troubleshooting Banding Problems

Corrective Action

No Printing Defects Found in the Diagnostic Print

The Advanced Diagnostic Prints

What are the Advanced Diagnostic Prints?

Printi ng the Advanced Diagnostics Print

Reading the Advanced diagnostic Print Results

Paper Advance

Corrective Action

Printhead Alignment

Reading the Printhead Alignment Diagnostic Print

Nozzle Health

Corrective Action for Nozzle Defects

Force Drop Detection

Troubleshooting Print Quality Problems

Print Quality General Advice

Horizontal Lines Across the Image (Banding)

Lines are Missing, Too Thin, or Too Thick

Problems with Stepped Lines

Lines are Printed Double or in Wrong Colors

Lines are discontinuous

Lines are Blurred (Ink Bleeds from Lines)

Problems with Graininess

Ink marks on the paper

Horizontal smears on the front of coated paper

Ink marks on the back of the paper

Darker than expected

Black and white prints do not look neutral

Horizontal lines at the end of a cut sheet print

White spots on the print

Output Only Contains a Partial Print

Problems with Image Clipping

Some objects are missing from the printed image

A PDF file is clipped or objects are missing

Print Quality Troubleshooting Wizard

When to use the Print Quality troubleshooting tool:

Corrective actions a customer can perform:

How to start the Print Quality Troubleshooting Wizard