HP DesignJet 1050C 1055C Printer Service Manual

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Using this Manual
Purpose
This Service Manual contains information necessary to test, calibrate and service: n HP DesignJet 1050C Printer (Model C6074A) n 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
Troubleshooting 1-1

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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 Des
ignJet 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

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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

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HP DesignJets 1050C and 1055CM Printers Service Manual