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Make/Model Information:

  • Brand:   Hewlett-packard
  • Models included:
    • HP DesignJet 1050C (C6074A)
    • HP DesignJet 1055CM (C6075A)

File Information:

  • Type:   Factory Service Manual (FSM)
  • Language:   English
  • Number of pages:   322
  • File size:  ∼ 11.96  MB
  • File Format:   PDF only
  • SME Watermarks:   None
  • Password lock:   No
  • Edit/copy/modify:   Yes
  • SKU:   BMHP-1030

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Service Manual
DesignJet 1050C/1055CMHP Large-Format Printers
Table of Contents
3HP DesignJets 1050C and 1055CM Printers Service Manual
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
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
Table of Contents
4 HP DesignJets 1050C and 1055CM Printers Service Manual
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
Table of Contents
5HP 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
6 HP DesignJets 1050C and 1055CM Printers Service Manual
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
Table of Contents
7HP 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
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
Table of Contents
8 HP DesignJets 1050C and 1055CM Printers Service Manual
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
Table of Contents
9HP DesignJets 1050C and 1055CM Printers Service Manual
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
1-1 HP DesignJets 1050C and 1055CM Printers Service Manual
Troubleshooting 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
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
Cut Sheet rice paper loading failure 1-13
34" Rice Paper not supported 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
Troubleshooting
1-2 HP DesignJets 1050C and 1055CM Printers Service Manual
Guide to Troubleshooting the Printer
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 contains 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 you 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 Page 1-19
The Current configuration sheet.
Which software application the customer is using (name, version,
etc.).
NOTE When reporting the System Error Code, make sure that you
supply the full Error Code (including the last 8 numbers where
applicable) and the firmware version. Without this information,
HP Support Personnel cannot help you.
7-1 HP DesignJets 1050C and 1055CM Printers Service Manual
Parts and Diagrams 7
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
Parts and Diagrams
7-2 HP DesignJets 1050C and 1055CM Printers Service Manual
Printer Support
Printer Support
Reference
Drawing
HP Part Number Quantity Description/Comments
1 C6072-60183 1 Tray Assembly
2 C6071-60182 2 Foot Assembly
3 C6072-60184 2 Legs Assembly
4 C6071-60181 1 Bin Assembly
5 C6072-60185 1 X-Brace Assembly
- C6071-60180 1 Hardware Kit (Includes Screw Drivers)
- C6072-60017 1 Bin Cover Assembly
Parts and Diagrams
7-3 HP DesignJets 1050C and 1055CM Printers Service Manual
Figure 3: Printer Support


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