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HP DesignJet 1050C/1055CM Large-Format Printers
Service Manual
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For HP Internal Use Only Warranty WARNING WARNING The Warning symbol calls ©Copyright Hewlett-Packard The information contained in this The procedures described in this attention to a procedure, practice, Company 1999 document is subject to change manual are to be performed by or the like, which, if not correctly without notice. HP-qualified service personnel This document contains performed or adhered to, could only. proprietary information that is Hewlett-Packard makes no result in pe
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1 HP DesignJet 1050C/1055CM Large-Format Printers 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
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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 th
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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
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Table of Contents 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 Che
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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
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Table of Contents 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 an
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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 Main
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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 In
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Table of Contents HP DesignJets 1050C and 1055CM Printers Service Manual 10
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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 Remain
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Troubleshooting 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 Man
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Troubleshooting 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. NOTE If the test on that component/assembly passes, you should NOT replace it. For information on the Service Tests and how to use them see Chapter 4 - Service Tests and Utilities. Performing the Necessary Service Calibrations Is the printer calibrated correctly a
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Troubleshooting Front-Panel LEDs Flash Briefly at Power ON & Nothing Else Happens The Power Supply detects a Short and shuts down the Power. 1 The Hard Disk Drive or the Network Card could be faulty. Troubleshoot the problem as follows: a If the Printer has a Hard Disk Drive and/or a Network card installed, switch the Printer OFF from the back of the Printer, and remove them both. b Switch the Printer ON again. c If the Printer functions correctly now, switch the Printer OFF again and reins
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Troubleshooting The Printer does not Power ON 1 Check that the power cord is connected correctly to the Printer and to the Power Socket. 2 Check that the Firmware DIMM is installed correctly in the correct slot (the first slot from the right) at the back of the Printer. 3 Check that the Power Switch on the BACK of the Printer is in the ON position. 4 Check that the Front-Panel Cable is correctly connected to the Electronics Module. Also make sure that the Front-Panel cable is not damaged.
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Troubleshooting The Printer Continuously Rejects Printheads 1 Clean the flex contacts on the Printhead and in the Carriage Assembly using the Carriage Interconnect Wiper (Refer to Chapter 3) and try again. 2 If ALL the Printheads are rejected (the status message on the Front Panel does NOT show "OK" for all the Printheads) then perform the Electronic Systems Test ⇒ Page 4-5. Cover Sensors are not Working 1 Check if the faulty sensor is installed correctly. 2 Check if the cable for the faulty
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Troubleshooting Troubleshooting Media Jams/Printhead Crashes NOTE If using HP Coated Media when problem occurred, please also refer to Page 1-10, Printhead Crashes/Smears on High Density Prints Using Coated Media. 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 head crash, thus causing many media jam failures to be reported as head crashes. 1 Did the media jam occur when lo
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Troubleshooting problem as explained as follows. WARNING In each case, make sure that you power OFF the printer before attempting any procedures to resolve the problem. Printhead Cleaner Path 1 Open the right door of the printer and check for any visible obstacles restricting the movement of the Service Station. Manually move the Service Station, checking for smooth and free movement. Paper Path 1 Open the Window and check for any visible obstacles restricting the movement of the Drive Roller
