HP DeskJet 70-75-755 printer service manual

Service Manual HP DesignJet 700, HP DesignJet 750C, HP DesignJet 750C Plus and HP DesignJet 755CM Plotters/Printers

For HP Internal Use Only E Copyright Hewlett- Packard Company 1996 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 into another language without the prior written consent of Hewlett- Packard Company. HP internal order number C4705-90000 Second edition, August 1996 Printed in U.S.A. Warranty 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 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: D Ensure that the ac power outlet (mains) has a protective earth (ground) terminal. D Disconnect the plotter from the power source prior to performing any maintenance. D Prevent water or other liquids from running onto electrical components or circuits, or through openings in the enclosure. Electrostatic Discharge Refer to the beginning of Chapter 6 of this manual, for precautions you should take to prevent damage to the plotter circuits from electrostatic discharge. Safety Symbols General definitions of safety symbols are given immediately after the table of contents. Learning Products, Barcelona Division Hewlett-Packard Española, S.A. Avda. Graells, 501 08190 Sant Cugat del Vallès Spain

Service Manual HP DesignJet 700 HP DesignJet 750C HP DesignJet 750C Plus and HP DesignJet 755CM Plotters/Printers

750C Plus C4705-90000 ++ !5+0) 6*+5 M#07#. !5+0) 6*+5 M#07#. Purpose *+5 /#07#. %106#+05 +0(14/#6+10 0’%’55#4; 61 6’56, %#.+$4#6’ #0& 5’48+%’: D HP D’5+)0J’6 700 2.166’45 (/1&’.5 C4705A #0& C4706A) D HP D’5+)0J’6 750C 2.166’45 (/1&’.5 C3195A #0& C3196A) D HP D’5+)0J’6 750C P.75 2.166’45 (/1&’.5 C4708A #0& C4709A) D HP D’5+)0J’6 755CM 24+06’45 (/1&’.5 C3198A #0& C3198B) F14 +0(14/#6+10 #$176 75+0) 6*’5’ 2.166’45/24+06’45, 4’(’4 61 6*’ %144’5210&+0) 75’4 #0& 37+%-=4’(’4’0%’ )7+&’5. Readership *’ 241%’&74’5 &’5%4+$’& +0 6*+5 /#07#. #4’ 61 $’ 2’4(14/’& $; HP=%’46+(+’& 5’48+%’ 2’45100’. 10.; . Training *’ HP 10)1+0) 64#+0+0) %1745’ CE"2=IJ 2418+&’5 64#+0+0) (14 HP C7561/’4 E0)+0’’45 #0& A76*14+<’& D’#.’45, 10 5’48+%+0) 6*’ %1/2.’6’ HP D’5+)0J’6 5’4+’5 1( .#4)’=(14/#6, 6*’4/#.=+0-,’6 2.166’45. Part Numbers P#46 07/$’45 (14 2.166’4 126+105, #%%’5514+’5 #0& 5’48+%’ 2#465 #4’ .1%#6’& +0 %*#26’4 10. Conventions *+5 /#07#. %106#+05 +0(14/#6+10 (14 6*’ /101%*41/’ HP D’5+)0J’6 700 2.166’45, 6*’ %1.14 HP D’5+)0J’6 750C #0& 750C P.75 2.166’45 #0& 6*’ %1.14 HP D’5+)0J’6 755CM 24+06’45. 1 *+)*.+)*6 6*’ &+((’4’0%’5 $’69’’0 6*’ 8#4+175 2.166’45/24+06’45 6*’ (1..19+0) 5;/$1.5 9+.. $’ 75’& +0 6*’ .’(6 /#4)+0: *+5 5;/$1. +0&+%#6’5 6*’ +0(14/#6+10 52’%+(+% 10.; 61 # 2#46+%7.#4 2.166’4/24+06’4. *’ 5;/$1. 9+.. %106#+0 6*’ 0#/’(5) 1( 6*’ 2.166’4(5) 6*#6 +6 +5 4’(’44+0) 61. E:#/2.’: *+5 6’:6 +5 #22.+%#$.’ 10.; 61 6*’ HP D’5+)0J’6 750C P.75. A.. 16*’4 +0(14/#6+10 016 /#4-’& $; 6*’5’ 5;/$1.5 +5 #22.+%#$.’ 61 #.. 2.166’45. *’ 6’4/ D/A1Ćsize plotters 4’(’45 )’0’4+%#..; 61 /1&’.5 C4705A, C3195A #0& C4708A *’ 6’4/ E/A0Ćsize plotters 4’(’45 )’0’4+%#..; 61 /1&’.5 C4706A, C3196A, C4709A, C3198A #0& C3198B. A 5/#.. #4419 ' +5 75’& 61 +0&+%#6’ 16*’4 2#465 1( 6*’ S’48+%’ M#07#. 14 !5’4'5 G7+&’ 9*’4’ ;17 %#0 (+0& +0(14/#6+10 4’.#6’& 61 6*’ 612+% ;17 #4’ %1057.6+0).

iii Contents C4699Ć90000 Contents Using this Manual ii .................................................. Safety Symbols x ..................................................... 1 Product Information Description 1Ć2 ........................................................... Applications 1Ć2 ....................................................... Drivers 1Ć2 ............................................................ Graphics Languages 1Ć2 ................................................ DeviceĆControl Languages 1Ć2 ........................................... Interface 1Ć3 .......................................................... Network Connections 1Ć3 ............................................... Memory 1Ć3 ........................................................... Accuracy 1Ć3 .......................................................... Resolution 1Ć4 ......................................................... Media Types 1Ć4 ....................................................... Media Sizes 1Ć5 ........................................................ Media Margins 1Ć5 ..................................................... Other Plotter Features 1Ć6 .............................................. Upgrading 1Ć6 ......................................................... 2 Site Planning and Requirements Power Requirements 2Ć2 ................................................... Choosing an Interface Cable 2Ć2 ............................................ Choosing a Suitable Plotter Environment 2Ć3 ................................

iv Contents C4699Ć90000 3 Installation and Configuration Unpacking and Assembling the Plotter/Printer 3Ć2 ........................... Inspecting the Plotter/Printer for Damage 3Ć5 ................................ Repacking the Plotter/Printer 3Ć5 ....................................... Assembling the Legs and Media Bin (Optional) 3Ć6 ........................... Installing the Plotter/Printer 3Ć10 ........................................... Using the Plotter 3Ć10 ...................................................... DesignJet 750C/750C Plus/755CM Front Panel 3Ć10 ........................ DesignJet 700 Front Panel 3Ć11 .......................................... ThirdĆParty Inks and OffĆAxis Ink Systems 3Ć11 ........................... Configuring the Plotter/Printer 3Ć12 ......................................... Verifying Plotter Operation 3Ć12 ............................................. PowerĆOn SelfĆTests 3Ć12 ................................................ Demonstration Plot 3Ć12 ................................................. Example of the Current Configuration Sheet 3Ć13 .......................... 4 Preventive Maintenance Moisture on the Plotter/Printer 4Ć2 ......................................... Noisy Carriage Bushing 4Ć2 ................................................ Belt Swelling 4Ć2 .......................................................... Cleaning the Plotter 4Ć2 ................................................... General Cleaning 4Ć2 ................................................... Cleaning the Drive Roller 4Ć3 ........................................... Scheduled Maintenance 4Ć4 ................................................ Level of Plotter Usage 4Ć4 .............................................. Implementation 4Ć4 .................................................... Usage Information 4Ć4 ..................................................

v Contents C4699Ć90000 5 Functional Overview Introduction 5Ć2 .......................................................... Simplified Description of Circuits 5Ć2 ........................................ Communications 5Ć2 ................................................... Plotting 5Ć2 ........................................................... ASICs 5Ć4 ............................................................. Servo Processor 5Ć4 .................................................... Stepper Motors 5Ć4 ..................................................... Cartridges 5Ć5 ......................................................... Mechanical Overview 5Ć5 ................................................... CarriageĆAxis Mechanism 5Ć5 ........................................... Line Sensor 5Ć5 ........................................................ MediaĆAxis Mechanism 5Ć6 .............................................. Primer Stepper Motor 5Ć6 ............................................... Bail Stepper Motor 5Ć6 ................................................. Wiper Stepper Motor 5Ć6 ................................................ Fan 5Ć6 ............................................................... Window Sensor 5Ć6 ..................................................... PinchĆWheel Sensor 5Ć6 ................................................ Media Sensor 5Ć7 ...................................................... Drop Sensor 5Ć7 ....................................................... PrimerĆCam Sensor 5Ć7 ................................................. Printed Circuit Assembly (PCA) Overview 5Ć7 ................................ Main PCA 5Ć7 ......................................................... Carriage PCA 5Ć8 ...................................................... LineĆSensor PCA 5Ć9 ................................................... TemperatureĆSensor IC 5Ć9 ............................................. LinearĆEncoder IC 5Ć9 .................................................. Print Control 5Ć9 ...................................................... PWM Signals 5Ć9 ...................................................... FrontĆPanel PCA 5Ć10 ................................................... Drop Sensor PCA 5Ć10 ................................................... PowerĆSupply PCA 5Ć10 .................................................

v+ Cont’nts C4699Ć90000 6 Removal and Replacement Cont’nts 6Ć2 .............................................................. S#(’ty Pr’%#ut+ons 6Ć3 ..................................................... El’%trost#t+% D+s%*#r)’ (ESD) Pr’%#ut+ons 6Ć3 ............................... R’#ss’m$ly 6Ć3 ........................................................... R’qu+r’& Tools 6Ć4 ........................................................ R’p#+r Pro%’&ur’s 6Ć5 ..................................................... R’mov+n) t*’ El’%tron+%sĆEn%losur’ Cov’r 6Ć5 ............................ R’mov+n) # M’mory Mo&ul’ (DRAM/ROM SIMM) 6Ć7 ..................... R’+nst#ll+n) # M’mory Mo&ul’ (DRAM/ROM SIMM): 6Ć8 .................. R’mov+n) t*’ M#+n PCA 6Ć9 ............................................ R’mov+n) t*’ Pow’rĆSupply PCA 6Ć11 .................................... R’mov+n) t*’ F#n 6Ć12 .................................................. R’mov+n) t*’ W+n&ow 6Ć13 .............................................. R’mov+n) t*’ C’nt’r Cov’r 6Ć14 ......................................... R’mov+n) t*’ L’(t En&%ov’r 6Ć16 ......................................... R’mov+n) t*’ R+)*t En&%ov’r 6Ć17 ....................................... R’mov+n) t*’ FrontĆP#n’l Ass’m$ly 6Ć18 ................................. R’mov+n) t*’ W+n&ow S’nsor 6Ć20 ....................................... R’mov+n) t*’ P+n%*ĆW*’’l S’nsor 6Ć21 ................................... R’mov+n) t*’ M’&+# S’nsor 6Ć22 ......................................... R’mov+n) t*’ C#rr+#)’ (YĆAx+s) Motor 6Ć24 ................................ R’mov+n) t*’ M’&+# (XĆAx+s) Motor 6Ć25 .................................. R’mov+n) t*’ En%o&’r Str+p 6Ć27 ......................................... R’+nst#ll+n) t*’ En%o&’r Str+p 6Ć29 ....................................... R’mov+n) t*’ YĆT’ns+on’r Hous+n) 6Ć31 ................................... R’mov+n) t*’ YĆAx+s Motor Hol&’r 6Ć32 ................................... R’mov+n) t*’ Cutt’r 6Ć33 ................................................ R’mov+n) t*’ C#rtr+&)’ C#rr+#)’ #n& Dr+v’ B’lt 6Ć34 ....................... R’mov+n) t*’ Tr#+l+n) C#$l’ 6Ć36 ........................................ R’+nst#ll+n) t*’ Tr#+l+n) C#$l’ 6Ć39 ....................................... R’mov+n) t*’ St#r)u#r& Ass’m$ly 6Ć40 ................................... R’mov+n) t*’ Pr+m’r 6Ć41 ............................................... R’mov+n) t*’ S’rv+%’ St#t+on 6Ć42 ........................................ R’mov+n) t*’ Sp+ttoon 6Ć44 .............................................. R’mov+n) t*’ B#+l Ass’m$ly 6Ć45 ......................................... R’mov+n) t*’ B#+l St’pp’r Motor 6Ć46 .................................... R’mov+n) t*’ C#$l’ Ass’m$ly 6Ć47 ....................................... R’mov+n) t*’ Ov’r&r+v’ Ass’m$ly 6Ć48 ................................... R’mov+n) t*’ Dr+v’ Roll’r Ass’m$ly 6Ć49 ................................. R’mov+n) t*’ Roll(’’& Cov’r Ass’m$ly 6Ć51 ............................... R’mov+n) t*’ Roll(’’& Mo&ul’ Ass’m$l+’s (L’(t #n& R+)*t) 6Ć52 ............. R’mov+n) t*’ Entry Pl#t’n 6Ć53 .......................................... R’mov+n) t*’ Cutt’rĆEn%losur’ Ass’m$ly 6Ć55 ............................ R’mov+n) t*’ M’&+# D+v’rt’r 6Ć56 ........................................ R’mov+n) t*’ P+n%*ĆArm Ass’m$l+’s 6Ć57 .................................

vii Contents C4699Ć90000 7 Calibrations and Adjustments Adjustments 7Ć2 .......................................................... Calibrations 7Ć2 ........................................................... Menu Path 7Ć3 ......................................................... Entering the Service Tests Menu System 7Ć3 .............................. Drop Detect Calibration 7Ć4 ............................................. Line Sensor Calibration 7Ć5 ............................................. Accuracy Calibration 7Ć6 ................................................ 8 Troubleshooting Diagnostics Ć Self Test 8Ć2 .................................................. Introduction 8Ć2 ....................................................... Initialization Sequences 8Ć2 ............................................. Switch ON Ć Normal Behavior 8Ć2 ....................................... PowerĆON SelfĆTest & Mechanical Initialization 8Ć3 ....................... Service Tests and Error Messages 8Ć4 .................................... Front Panel Messages 8Ć5 .................................................. Worded Error Messages 8Ć5 ............................................. System Error Codes 8Ć9 ................................................ Important Information on Troubleshooting Error Codes 8Ć9 ................... Service Tests 8Ć17 .......................................................... Entering the Service Tests Menu System 8Ć20 .............................. 1. EEROM 8Ć21 ......................................................... 2. EEROM Clear Counters 8Ć22 .......................................... 3. EEROM Model Type 8Ć23 .............................................. 3. EEROM Model Type 8Ć23 .............................................. 4. MIO 8Ć24 ............................................................ 5. Main PCA 8Ć25 ....................................................... 6. MainĆCarriage Com 8Ć26 ............................................... 7. Carriage 8Ć27 ......................................................... 8. Thermal Control 8Ć28 ................................................. 9. TTOE 8Ć29 ........................................................... 10. Pen Continuity 8Ć30 .................................................. 11. Pen ID 8Ć31 ......................................................... 12. Nozzle Print Test 8Ć32 ............................................... 13. Mono PQ Plot 8Ć33 ................................................... 14. Color PQ Plot 8Ć34 ................................................... 15. Area fill PQ Plot 8Ć35 ................................................ 16. Pen Nozzle Detect 8Ć36 ............................................... 17. Drop Detector 8Ć37 .................................................. 18. Edge Detect 8Ć39 .................................................... 19. Pen Alignment 8Ć40 .................................................. 20. Ortho Wiper 8Ć41 ....................................................

viii Contents C4699Ć90000 21. Primer Test 8Ć42 .................................................... 22. X Motion Control 8Ć43 ................................................ 23. Mark Position 8Ć44 ................................................... 24. YĆAxis Friction 8Ć45 .................................................. 25. YĆStatic Friction 8Ć46 ................................................. 26. YĆAxis Encoder 8Ć47 .................................................. 27. Cutter 8Ć48 ......................................................... 28. Bail Stepper 8Ć49 .................................................... 29. Media Sensor 8Ć50 ................................................... 30. Window Sensor 8Ć51 ................................................. 31. Pinchwheel Sensor 8Ć52 .............................................. 32. Button Test 8Ć53 ..................................................... PCĆBased Diagnostics 8Ć54 .................................................. Troubleshooting Tips 8Ć55 .................................................. Service Configuration Plot 8Ć56 .............................................. EEROM Text Block 8Ć57 .................................................... EEROM Map 8Ć58 .......................................................... 9 Print Quality Print Quality Troubleshooting Checklist 9Ć2 ................................. Print Modes 9Ć5 ........................................................... PrintĆMode Characteristics 9Ć5 .......................................... How do I select the print mode? 9Ć12 ...................................... PrintĆQuality Diagnostic Plots 9Ć13 .......................................... CAD 2ĆD Monochrome Plot 9Ć13 .......................................... CAD Color Diagnostic Plot 9Ć15 .......................................... AreaĆFill Diagnostic Plot 9Ć17 ............................................ Print Quality Problems 9Ć18 ................................................. Cockle 9Ć18 ............................................................. Coalescence 9Ć18 ........................................................ Bleeding 9Ć19 ........................................................... Feathering 9Ć19 ......................................................... Migration (Black) 9Ć19 ................................................... Halo 9Ć20 .............................................................. Banding 9Ć20 ...........................................................

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HP DeskJet 70-75-755 printer service manual

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