Troubleshooting1

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 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

HP DesignJets 1050C and 1055CM Printers Service Manual

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