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HP DesignJet 1050C/1055CM Large-Format Printers
Service Manual
For HP Internal Use Only Warranty
©Copyright Hewlett-Packard
Company 1999
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.
First Edition, March 1999
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 WARNING
The procedures described in this manual are to be performed by
HP-qualified service personnel only.
Electrical Shock Hazard
Serious shock hazard leading to death or injury may result if you do not take the following precautions:
- Ensure that the ac power outlet
(mains) has a protective earth
(ground) terminal.
- Disconnect the Printer from the power source prior to performing any maintenance.
- Prevent water or any other liquids from running onto electrical components or circuits, or through openings in the enclosure.
The Warning symbol calls attention to a procedure, practice, or the like, which, if not correctly performed or adhered to, could result in personal injury. Do not proceed beyond a Warning symbol until the indicated conditions are fully understood and met.
CAUTION
The Caution symbol calls attention to an operating procedure, practice, or the like, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the product. Do not proceed beyond a Caution symbol until the indicated conditions are fully understood and met.
Electrostatic Discharge
Refer to the beginning of Chapter
8 of this manual, for precautions you should take to prevent damage to the Printer circuits from electrostatic discharge.
Safety Symbols
General definitions of safety symbols are given immediately after the table of contents.
Technical Marketing,
Barcelona Division,
Hewlett-Packard Espanola, S.A.
Avda. Graells, 501
08190 Sant Cugat del Valles
Spain
1
HP DesignJet 1050C/1055CM Large-Format Printers
Service Manual
Using this Manual
Purpose
This Service Manual contains information necessary to test, calibrate and service: n n
HP DesignJet 1050C Printer (Model C6074A)
HP DesignJet 1055CM Printer (Model C6075A)
For information about using these printers, refer to the corresponding User and Quick Reference Guides.
Readership
The procedures described in this Service Manual are to be performed by HP Certified service personnel only.
Part Numbers
Part Numbers for Printer options, accessories and service parts are located in Chapter 7.
Conventions
A small arrow
⇒ is used to indicate other parts of the Service
Manual where you can find information related to the topic you are consulting.
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HP DesignJets 1050C and 1055CM Printers Service Manual
Table of Contents
Table of Contents
1
Troubleshooting 1-1
Introduction 1-2
Troubleshooting System Error Codes 1-2
Performing a Service Test on a Failed Assembly 1-3
Performing the Necessary Service Calibrations 1-3
Solving Image Quality Problems 1-3
Front-Panel LEDs Flash Briefly at Power ON & Nothing Else Happens 1-4
The Printer does not Power ON 1-5
ALL the Front-Panel LEDs are Lit but Nothing Else Happens 1-5
One of the Print Quality LEDs on the Front Panel is Lit (and nothing else) and the "SELF TEST..." Message Remains on the Front Panel 1-5
The Printer Continuously Rejects Printheads 1-6
Cover Sensors are not Working 1-6
The Line Sensor has Problems Detecting Media 1-6
Troubleshooting Media Jams/Printhead Crashes 1-7
Troubleshooting Shutdowns 1-7
Problems with the Vacuum Fan 1-9
Vacuum suction much lower at high altitudes 1-9
Bin marks on prints done on HP High Gloss media 1-9
Printhead Crashes/Smears on High Density Prints Using Coated Media 1-10
Color changes when stacking prints done on HP High Gloss Media 1-10
HP-GL/2 color differences in different HP DesignJet Printers 1-11
Scratches on prints done on NTP, Vellum and HP High Gloss media 1-11
Banding at variable extreme environmental conditions 1-12
Banding due to Ink Cartridge replacement while printing 1-12
Long term bleed and hue shift on HP High Gloss media 1-12
Lower image gloss directly after printing on HP High Gloss Photo Paper 1-13
34" Rice Paper not supported 1-13
Cut Sheet rice paper loading failure 1-13
Worm marks on HP Coated media with light area fills 1-13
Solving Media-Handling Problems 1-14
How to Navigate through the Front-Panel Menu 1-15
Service Configuration Print 1-19
HP DesignJets 1050C and 1055CM Printers Service Manual
3
Table of Contents
System Error Codes 2-1
Introduction 2-2
Continuable and Non-Continuable Error Codes 2-2
System Error Codes During Initialization 2-18
HP No.80 Ink Supplies Troubleshooting 3-1
What are HP No.80 Supplies? 3-2
Ink Cartridges 3-2
Printheads and Printhead Cleaners 3-2
Identifying the Components 3-3
General Information About HP No.80 Supplies 3-4
Some General Precautions When Handling HP No.80 Supplies 3-5
Priming the Ink System 3-6
When Should You Replace the HP No.80 Supplies? 3-6
The Front Panel Display 3-7
Obtaining Ink Cartridge Information 3-8
Obtaining Printhead Information 3-9
Ink Cartridge Status Messages 3-11
Ink Cartridge Status While Printing 3-11
Ink Cartridge Status While Replacing 3-12
Printhead Status Messages While Printing 3-13
Printhead Status Messages While Replacing 3-15
Summary of Solving HP No.80 Supplies Problems 3-17
Carriage Interconnect Wiper 3-18
4
HP DesignJets 1050C and 1055CM Printers Service Manual
Service Tests and Utilities 4-1
Service Tests (Diagnostics) 4-3
Entering the Service Tests Menu 4-4
1. Electronic Systems 4-5
2. EIO Card 4-10
3. Hard Disk Drive 4-12
4. Ink Pressure System 4-14
5. Scan Axis 4-17
6. Paper Axis 4-20
7. Drop Detector 4-22
Service Utilities 4-25
Entering the Service Utilities Menu 4-26
1. Tubes Purge 4-28
2. Release Info 4-32
3. Set Asian PS Fonts 4-33
4. Printer Model Type 4-35
5. Overdrive Cleaning 4-37
6. EEROM Utilities 4-38
7. Printhead Check 4-41
8. Mon. Mode Baud Sel. 4-42
Service Calibrations 5-1
Service Calibrations 5-2
Entering the Service Calibrations Menu 5-4
1. Accuracy Calibration 5-6
2. Line Sensor 5-9
3. Service Station 5-11
4. Roller Mark Position 5-13
5. Pen to Paper Spacing 5-15
6. Color to Color calibration 5-16
7. Calibrations Backup 5-19
8. Pen Alignment 5-22
Carriage Height Calibration 5-24
Table of Contents
HP DesignJets 1050C and 1055CM Printers Service Manual
5
Table of Contents
Print Quality 6-1
Print Quality Troubleshooting Checklist 6-2
Print Modes 6-3
How to Use the Print Quality Test 6-4
What is the Print Quality Test? 6-4
Considerations for Printing the Print Quality Test. 6-4
Printing the Print Quality Test 6-4
Nozzle Print Test 6-6
How to fix the Nozzle Defects 6-7
Color Alignment Print Test 6-7
Solving the Color Alignment Problem 6-8
Overall Print Quality Test in BEST mode 6-9
What is Banding? 6-9
Solving the Banding Problem 6-10
Aligning the Printheads 6-12
Service Accuracy Calibration 6-12
Troubleshooting Print Quality Problems 6-13
Problems with Stepped Lines 6-13
Problems with printing lines 6-14
Problems with Color-to-Color Alignment 6-15
Problems with Horizontal Lines (Banding) 6-17
No Printing Defects Found in the Print Quality Test 6-21
Solving Color Accuracy problems 6-22
Color Consistency problems 6-22
Long Term Color Bleeding (Glossy Papers) 6-22
Color Accuracy Configuration 6-23
Media 6-24
There are Smears or Scratching on the Printed Media 6-24
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HP DesignJets 1050C and 1055CM Printers Service Manual
Parts and Diagrams 7-1
Printer Support 7-2
Rear Covers 7-4
Electronics Module 7-6
Right Hand Cover 7-8
Left Hand Cover and Window 7-10
Right Hand Assemblies 7-12
ISS and APS Assembly 7-14
Clutch Assembly 7-16
Carriage Assembly 7-18
Scan-Axis Assemblies 7-20
Drive Roller and ARSS Miscellaneous Parts 7-22
Paper Path Assemblies 7-24
Pinch Assembly 7-26
Drive Roller Assemblies 7-28
Center Guide and Media Sensor 7-30
Tubes Guide Assemblies 7-32
Ordering Accessories 7-34
Table of Contents
Removal and Installation 8-1
Introduction 8-2
Safety Precautions 8-2
Electrostatic Discharge (ESD) Precautions 8-3
Required Tools 8-3
Right Hand Cover 8-4
Front Panel Assembly 8-6
Right Hand Trim and Window Switch 8-7
Service Station Assembly 8-8
Drop Detector Assembly 8-10
Vacuum Fan 8-11
Paper-axis Motor Assembly 8-12
Left Hand Cover 8-13
Left Hand Trim Assembly 8-18
Ink Supply Station Assembly (ISS) 8-19
Air Pressurization System (APS) 8-20
Clutch Assembly and left hand miscellaneous parts 8-21
Tail Deflectors and Rear Platen 8-23
Left and Right Rear Covers 8-24
HP DesignJets 1050C and 1055CM Printers Service Manual
7
8
Table of Contents
Electronics Module 8-25
Media Sensor 8-29
Window 8-30
Top Cover 8-31
Back Cover 8-32
Scan-axis Motor Assembly 8-33
Encoder Strip 8-34
Tensioner 8-37
Trailing Cable 8-39
Cutter Assembly 8-42
Carriage Assembly and Belt 8-44
Tubes System Assembly 8-53
Ink Leak Detector Assembly 8-60
Front Platen Assembly 8-62
Platen Assembly 8-63
Paper Entry Assembly 8-64
Roller Guide 8-66
Media Holder Strip 8-69
Drive Roller 8-70
Center Guide 8-71
Pinch-Wheel Assembly and Cam 8-73
Preventive Maintenance 9-1
Moisture on the Printer 9-2
Noisy Carriage Bushing 9-2
Belt Swelling 9-2
Cleaning the Printer 9-2
General Cleaning 9-2
Cleaning the Overdrive 9-3
Scheduled Maintenance 9-3
Level of Printer Usage 9-3
Scan-axis Maintenance 9-4
HP DesignJets 1050C and 1055CM Printers Service Manual
Table of Contents
Functional Overview 10-1
Introduction 10-2
HP DesignJet 1050C Printer 10-2
HP DesignJet 1055CM printer 10-2
Electrical System 10-2
Power Supply Unit (PSU) 10-3
Soft Power-Off Switch 10-4
Front Panel 10-4
Ink Delivery System (IDS) 10-5
Ink Supply Station (ISS) 10-5
Tubes System 10-6
Air Pressurization System (APS) 10-7
Ink Level Sense (ILS) 10-7
Leak Detect System (LDS) 10-8
Service Station 10-9
Print Head Cleaner (PHC) 10-9
Printer Specifications 10-12
Printable Area 10-16
Interface Specifications 10-17
Regulatory Notices 10-18
To Obtain a Material Safety Data Sheet (MSDS) 10-18
Sound 10-18
Electro-Magnetic Compatibility (EMC) 10-18
VCCI Class A and Class B (Japan) 10-21
Declaration of Conformity 10-22 www.designjet-online.hp.com 10-23
Glossary
Index
HP DesignJets 1050C and 1055CM Printers Service Manual
For the complete PDF manual please visit www.LaserPros.com
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