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hp LaserJet 1000 series
service
hp LaserJet 1000 series printer
service
Copyright Information
© 2001 Hewlett-Packard Company All Rights Reserved. Reproduction, adaptations, or translation without prior written permission is prohibited except as allowed under copyright laws. Part number Q1342-90901 First edition, August 2001 Printed in USA
Trademark Credits Microsoft, Windows, and MSDOS are U.S. registered trademarks of Microsoft Corporation. TrueType is a U.S. trademark of Apple Computer, Inc. All other products mentioned herein might be trademarks of their respective companies.
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Unplug this product from wall outlets before cleaning. Do not install or use this product near water or when you are wet. Install the product securely on a stable surface. Install the product in a protected location where no one can step on or trip over the power cord and the power cord will not be damaged. If the product does not operate normally, see the online user guide. Refer all servicing questions to qualified personnel.
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9 Warranty The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with respect to this information. HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard shall not be liable for any direct, indirect, incidental, consequential, or other damage alleged in connection with the furnishing or use of this information. NOTICE TO U.S. GOVERNMENT USERS: RESTRICTED RIGHTS COMMERCIAL COMPUTER SOFTWARE: "Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1)(ii) of the Rights in Technical Data Clause at DFARS 52.227-7013." Safety Information WARNING! Potential Shock Hazard Always follow basic safety precautions when using this product to reduce risk of injury from fire or electric shock. 1 Read and understand all instructions in the user guide. Observe all warnings and instructions marked on the product. Use only a grounded electrical outlet when connecting the HP LaserJet 1000 printer to a power source. If you don't know whether the outlet is grounded, check with a qualified electrician. Do not touch the contacts on the end of any of the sockets on the HP LaserJet 1000 printer. Replace damaged cords immediately. 10
Information regarding FCC Class B, Parts 15 and 68 requirements can be found in the user guide.
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Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho 83714 U.S.A.
Contents
Figures Tables 1 Product information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Printer features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Product specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Specification tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Overview of printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Front and side view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Back and side view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Warranty statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Extended warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Toner cartridge information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Refilled toner cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Recycling of toner cartridges . . . . . . . . . . . . . . . . . . . . . . . . .10
2 Removal and replacement
Removal and replacement strategy. . . . . . . . . . . . . . . . . . . . . . . .13 Required tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Before performing service. . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Parts removal order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Toner cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 External assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Media tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Cable pod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 Left side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 Back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 ECU PCB fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 Output sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23 Right side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
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Top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 Connector PCB Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . .30 LED status panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 Front cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 Toner cartridge door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 Front guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36 Internal assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 Transfer roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 Laser/scanner assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 Fuser assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 Output rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46 Face-down delivery assembly . . . . . . . . . . . . . . . . . . . . . .46 Face-up roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47 Right plate assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48 Pickup assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 Pickup roller assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53 Paper lift plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . .54 Left plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55 Bottom assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56 ECU pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56 Paper-feed assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
3 Troubleshooting
Basic troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64 Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67 LED status lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67 Additional error messages . . . . . . . . . . . . . . . . . . . . . . . . . . .70 Checking the toner cartridge . . . . . . . . . . . . . . . . . . . . . . . . .71 To redistribute toner in the cartridge. . . . . . . . . . . . . . . . . .71 Solving image-quality problems . . . . . . . . . . . . . . . . . . . . . . .72 Solving print image-quality problems . . . . . . . . . . . . . . . . .72 Solving paper-feed problems . . . . . . . . . . . . . . . . . . . . . . . . . . . .77 Functional checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79 Engine test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79 Printing an engine test . . . . . . . . . . . . . . . . . . . . . . . . . . . .79 Half self-test functional check . . . . . . . . . . . . . . . . . . . . . . . .81 To perform a half self-test check . . . . . . . . . . . . . . . . . . . .81 To perform other checks. . . . . . . . . . . . . . . . . . . . . . . . . . .81 Drum rotation functional check . . . . . . . . . . . . . . . . . . . . . . .82 Heating-element check . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83 High-voltage power supply check . . . . . . . . . . . . . . . . . . . . .84 To check the toner cartridge connection points . . . . . . . . .84 To check the high-voltage connector assembly . . . . . . . . .85 Paper-path check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86 To override SW301. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86 Troubleshooting tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87 iv Chapter - Contents
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Repetitive image defect ruler . . . . . . . . . . . . . . . . . . . . . . . .87 Location of ECU Connectors . . . . . . . . . . . . . . . . . . . . . . . . .88 Location of printer connectors. . . . . . . . . . . . . . . . . . . . . . . . .89
4 Parts and diagrams
Ordering parts and supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92 Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92 Related documentation and software . . . . . . . . . . . . . . . . . . .92 Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93 How to use the parts lists and diagrams . . . . . . . . . . . . . . . . . . . .94 Common hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94 Media tray and cable pod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95 Part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95 Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96 Part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97 Internal assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98 Internal components (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . .98 Part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99 Internal components (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . .100 Part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101 Electrical components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102 Part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103 Paper pickup assembly (1 of 2) . . . . . . . . . . . . . . . . . . . . . .104 Part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105 Paper pickup assembly (2 of 2) . . . . . . . . . . . . . . . . . . . . . .106 Part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107 Fuser assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108 Part numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109 Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110 Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
Index
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vi Chapter - Contents
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Figures
Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. Figure 26. Figure 27. Figure 28. Figure 29. Figure 30. Figure 31. Figure 32. Figure 33. Figure 34. Figure 35. Figure 36. Figure 37.
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Model and serial number label . . . . . . . . . . . . . . . . . . .3 Front and side view . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Back and side view . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Remove the toner cartridge. . . . . . . . . . . . . . . . . . . . .15 Remove the media tray . . . . . . . . . . . . . . . . . . . . . . . .16 Remove the cable pod . . . . . . . . . . . . . . . . . . . . . . . .17 Remove the left side cover . . . . . . . . . . . . . . . . . . . . .18 Open the straight-through output door . . . . . . . . . . . .19 Remove the back cover. . . . . . . . . . . . . . . . . . . . . . . .20 Remove the ECU PCB fuse . . . . . . . . . . . . . . . . . . . .21 Remove the output sensor . . . . . . . . . . . . . . . . . . . . .22 Remove the motor (fuser removed for clarity). . . . . . .23 Remove the right side cover mounting screw . . . . . . .24 Release the right side cover tab . . . . . . . . . . . . . . . . .25 Remove the right side cover . . . . . . . . . . . . . . . . . . . .26 Disconnect the solenoid wire harness. . . . . . . . . . . . .27 Remove the solenoid. . . . . . . . . . . . . . . . . . . . . . . . . .28 Remove the top cover . . . . . . . . . . . . . . . . . . . . . . . . .29 Remove the connector assembly . . . . . . . . . . . . . . . .30 Remove the LED status panel. . . . . . . . . . . . . . . . . . .31 Remove the front cover mounting screws . . . . . . . . . .32 Remove the front cover . . . . . . . . . . . . . . . . . . . . . . . .33 Release the toner cartridge door connecting links . . .34 Remove the toner cartridge door. . . . . . . . . . . . . . . . .35 Remove the front guide assembly. . . . . . . . . . . . . . . .36 Release the front guide assembly tabs (right side) . . .37 Release the front guide assembly tabs (left side) . . . .38 Remove the transfer roller. . . . . . . . . . . . . . . . . . . . . .39 Disconnect the laser/scanner harnessing . . . . . . . . . .40 Remove the laser/scanner . . . . . . . . . . . . . . . . . . . . .41 Remove the right fuser bracket . . . . . . . . . . . . . . . . . .42 Remove the left fuser bracket . . . . . . . . . . . . . . . . . . .43 Remove the fuser mounting screws . . . . . . . . . . . . . .44 Remove the fuser assembly . . . . . . . . . . . . . . . . . . . .45 Remove the output rollers . . . . . . . . . . . . . . . . . . . . . .46 Remove the face-up rollers . . . . . . . . . . . . . . . . . . . . .47 Remove the gear-clutch assembly . . . . . . . . . . . . . . .48 xi
Figure 38. Figure 39. Figure 40. Figure 41. Figure 42. Figure 43. Figure 44. Figure 45. Figure 46. Figure 47. Figure 48. Figure 49. Figure 50. Figure 51. Figure 52. Figure 53. Figure 54. Figure 55. Figure 56. Figure 57. Figure 58. Figure 59. Figure 60. Figure 61. Figure 62. Figure 63. Figure 64. Figure 65. Figure 66. Figure 67. Figure 68. Figure 69. Figure 70.
Remove the right plate assembly mounting screws . .49 Remove the pickup assembly mounting screw . . . . . .50 Remove the top pickup assembly mounting screws . .51 Remove the metal shield. . . . . . . . . . . . . . . . . . . . . . .52 Remove the pickup roller assembly . . . . . . . . . . . . . .53 Remove the paper lift plate assembly . . . . . . . . . . . . .54 Remove the left plate assembly . . . . . . . . . . . . . . . . .55 Disconnect the ECU wire harnesses. . . . . . . . . . . . . .56 Remove the ECU mounting screws . . . . . . . . . . . . . .57 Remove the ECU pan . . . . . . . . . . . . . . . . . . . . . . . . .58 Remove the ECU PCB from the pan. . . . . . . . . . . . . .59 Remove wire harnesses . . . . . . . . . . . . . . . . . . . . . . .60 Remove the paper-feed assembly . . . . . . . . . . . . . . .61 Release the paper-feed roller . . . . . . . . . . . . . . . . . . .62 LED status lights location . . . . . . . . . . . . . . . . . . . . . .67 Engine-test button . . . . . . . . . . . . . . . . . . . . . . . . . . . .79 Connectors for the heating element check . . . . . . . . .83 High-voltage connection points (right side) . . . . . . . . .84 High-voltage connection points (left side) . . . . . . . . . .84 High-voltage connector assembly (right side) . . . . . . .85 High-voltage connector assembly (left side) . . . . . . . .85 Override SW301 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86 Repetitive image defect ruler. . . . . . . . . . . . . . . . . . . .87 HP LaserJet 1000 ECU PCB. . . . . . . . . . . . . . . . . . . .88 Printer connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . .89 Media tray and cable pod . . . . . . . . . . . . . . . . . . . . . .95 HP LaserJet 1000 covers . . . . . . . . . . . . . . . . . . . . . .96 Internal components (1 of 2) . . . . . . . . . . . . . . . . . . . .98 Internal componentsm (2 of 2) . . . . . . . . . . . . . . . . .100 Electrical components . . . . . . . . . . . . . . . . . . . . . . . .102 Paper pickup assembly (1 of 2). . . . . . . . . . . . . . . . .104 Paper pickup assembly (2 of 2). . . . . . . . . . . . . . . . .106 Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108
xii Chapter - Figures
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Tables
Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. Table 17. Table 18. Table 19. Table 20. Table 21. Table 22. Table 23. Table 24. Table 25. Table 26. Table 27. Table 28.
HP LaserJet 1000 Series printer features . . . . . . . . . . .2 Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . .4 Environmental specifications . . . . . . . . . . . . . . . . . . . .4 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Print operating acoustical emissions specifications . . . .5 Skew specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Basic troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . .64 LED status lights legend . . . . . . . . . . . . . . . . . . . . . . .67 Status lights messages . . . . . . . . . . . . . . . . . . . . . . . .68 Error messages (no LED status panel pattern) . . . . . .70 Solving print image-quality problems . . . . . . . . . . . . . .72 Solving paper-feed problems . . . . . . . . . . . . . . . . . . . .77 Engine test troubleshooting . . . . . . . . . . . . . . . . . . . . .80 ECU connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88 Printer connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . .89 Technical support websites . . . . . . . . . . . . . . . . . . . . .92 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93 Common fasteners. . . . . . . . . . . . . . . . . . . . . . . . . . . .94 Printer tray and cover. . . . . . . . . . . . . . . . . . . . . . . . . .95 Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97 Internal components (1 of 2) . . . . . . . . . . . . . . . . . . . .99 Internal components (2 of 2) . . . . . . . . . . . . . . . . . . .101 Electrical components . . . . . . . . . . . . . . . . . . . . . . . .103 Paper pickup assembly (1 of 2) . . . . . . . . . . . . . . . . .105 Paper pickup assembly (2 of 2) . . . . . . . . . . . . . . . . .107 Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109 Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . .110 Numerical parts list. . . . . . . . . . . . . . . . . . . . . . . . . . .112
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xiv Chapter - Tables
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1
Product information
Chapter contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Printer features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Product specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Overview of printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Front and side view . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Back and side view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Warranty statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Extended warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Toner cartridge information . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Refilled toner cartridges . . . . . . . . . . . . . . . . . . . . . . . . 10 Recycling of toner cartridges . . . . . . . . . . . . . . . . . . . . 10
Q1342-90910
Chapter contents 1
Introduction
This manual contains the necessary information to service the HP LaserJet 1000 Series printer. Service topics include printer features, product specifications, location of model and serial numbers, warranty information, toner cartridge information, part removal procedures, troubleshooting procedures, and an illustrated parts chapter. Hint See the HP LaserJet 1000 Series printer user guide for information about printer installation, use, and operation.
Printer features
Table 1. HP LaserJet 1000 Series printer features
Speed Resolution Connectivity
z z z z z
10 pages per minute (ppm) letter-size media 600 dot-per-inch (dpi) printing 1.1 universal serial bus (USB) port External cable pod (formatter) The HP LaserJet 1000 Series printer is designed for use only with an IBM-compatible computer 250-sheet input tray 125-sheet output bin 2500 page toner cartridge life 1000 page-per-month average 1 MB SDRAM Windows® 98 Windows 2000 Windows Millennium Edition (Me) Windows XP Enhanced PCL 5e (with MS-DOS® emulation)
Media handling Toner Duty cycle Memory Microsoft® operating systems supported
z z z z z z z z z
PCL printer language z
2 Chapter 1 - Product information
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Product specifications
Identification
The model number and serial numbers are listed on an identification label located on the bottom of the printer. The serial number contains information about the country of origin and the revision level, production code, and production number of the printer. The label also identifies power rating and regulatory information.
Figure 1.
Model and serial number label
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Product specifications 3
Specification tables
Table 2. Physical specifications Category
Height Depth Width Weight (toner cartridge installed)
Specification
253 mm (10 inches) 486 mm (19.1 inches) 415 mm (16.3 inches) 7.3 kg (16.1 lb)
Table 3. Environmental specifications Category
Operating environment (printer plugged into an ac outlet) Printer storage environment (printer not plugged into an ac outlet) Toner cartridge storage environment (printer not plugged into an ac outlet)
Specification
z z
Temperature: 15° to 32.5° C (59° to 90.5° F) Humidity: 10 to 80 percent relative humidity (no condensation) Temperature: -20° to 60° C (-4° to 140° F) Humidity: 10 to 90 percent relative humidity (no condensation) Temperature: -20° to 40° C (-4° to 104° F) Humidity: 10 to 90 percent relative humidity (no condensation)
z z
z z
Table 4. Power specifications Category
Power requirements
Specification
z
110 Vac (± 12 percent), 60 (± 3) Hz; 127 Vac (± 12 percent), 60 (± 3) Hz -Orz 220 Vac (± 12 percent), 50/60 (± 3) Hz z 240 Vac (± 12 percent), 50 (± 3) Hz
WARNING! CAUTION
Power sources are not interchangeable. To prevent damage to the printer, always connect it to a surge-protected power source.
4 Chapter 1 - Product information
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Table 4. Power specifications (continued) Category
Power consumption (in continuous copy mode) Power consumption (idle) Power consumption (off) Minimum recommended circuit capacity
Specification
285 W
7W 0W 4.5 A at 115 V 2.3 A at 230 V
Table 5. Print operating acoustical emissions specifications Category
Sound power level, LWAd (1 bel = 10 decibels) Sound pressure level, LpAm (operator position) Sound pressure level, LpAm (bystander position)
Specification
6.1 dB(A) 56 dB(A) 48 dB(A)
Table 6. Skew specifications Category
Print skew--left
Specification
0.8 percent (2 mm on media 250 mm in length) for cut-sheet media 1.5 percent (3.3 mm on media 220 mm in length) for cut-sheet media 0.87 percent (1.65 mm on media190 mm in width) for cut-sheet media
Print skew--right Cut-sheet leading edge skew
1.5 percent (3.3 mm on media 220 mm in width) for envelopes, postcards, A5, and cut-sheet media 0.87 percent (1.6 mm on media 190 mm in width)
Q1342-90910
Product specifications 5
Overview of printer
Front and side view
1
2 3
7 4 6 5
Figure 2.
Front and side view 1 2 3 4 5 6 7 LED status lights Output bin Toner cartridge door Input tray Sliding side media guides Long media support for the input tray Input tray cover
6 Chapter 1 - Product information
Q1342-90910
Back and side view
8
9 10 11
12
Figure 3.
Back and side view 8 9 Media jam release levers Port for the USB cable pod
10 Engine test button 11 Power receptacle 12 Straight-through output door
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Overview of printer 7
Warranty statement
DURATION OF WARRANTY: One year from date of purchase 1 HP warrants to you, the end-user customer, that HP hardware, accessories, and supplies, will be free from defects in materials and workmanship after the date of purchase, for the period specified above. The customer is responsible for maintaining proof of date of purchase. If HP receives notice of such defects during the warranty period, HP will, at its option, either repair or replace products which prove to be defective. Any replacement products may be either new or like-new, provided that it has functionality at least equal to that of the product being replaced. HP warrants to you that HP software will not fail to execute its programming instructions after the date of purchase, for the period specified above, due to defects in material and workmanship when properly installed and used. If HP receives notice of such defects during the warranty period, HP will replace software media which does not execute its programming instructions due to such defects. HP does not warrant that the operation of HP products will be uninterrupted or error free. If HP is unable, within a reasonable time, to repair or replace any product to a condition as warranted, you will be entitled to a refund of the purchase price upon prompt return of the product. HP products may contain remanufactured parts equivalent to a new in performance or may have been subject to incidental use. Warranty does not apply to defects resulting from (a) improper or inadequate maintenance or calibration, (b) software, interfacing, parts or supplies not supplied by HP, (c) unauthorized modification or misuse, (d) operation outside of the published environmental specifications for the product, or (d) improper site preparation or maintenance. HP MAKES NO OTHER EXPRESS WARRANTY OR CONDITION WHETHER WRITTEN OR ORAL. TO THE EXTENT ALLOWED BY LOCAL LAW, ANY IMPLIED WARRANTY OR CONDITION OR MERCHANTABILITY, SATISFACTORY QUALITY, OR FITNESS FOR A PARTICULAR PURPOSE IS LIMITED TO THE DURATION OF THE EXPRESS WARRANTY SET FORTH ABOVE. Some countries, states or provinces do not allow limitations on the duration of an implied warranty, so the above limitation or exclusion might not apply to you. This warranty gives you specific legal rights and you might also have other rights that vary from country to country, state to state, or province to province.
2
3
4 5
6
8 Chapter 1 - Product information
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7
TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES IN THIS WARRANTY STATEMENT ARE YOUR SOLE AND EXCLUSIVE REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL HP OR ITS SUPPLIERS BE LIABLE FOR LOSS OF DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT OR DATA), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE. Some countries, states or provinces do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. FOR CONSUMER TRANSACTIONS IN AUSTRALIA AND NEW ZEALAND; THE WARRANTY TERMS CONTAINED IN THIS STATEMENT, EXCEPT TO THE EXTENT LAWFULLY PERMITTED, DO NOT EXCLUDE, RESTRICT OR MODIFY AND ARE IN ADDITION TO THE MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU.
Extended warranty
HP SupportPack provides coverage for the HP hardware product and all HP-supplied internal components. The hardware maintenance warranty covers a three-year period from the date of the HP product purchase. The customer must purchase the HP SupportPack (document number is 9036) within 180 days of the HP product purchase. Customers can contact the nearest HP-authorized dealer about this service.
Q1342-90910
Warranty statement 9
Toner cartridge information
The toner cartridge is designed to simplify replacement of the major consumable parts. The toner cartridge contains the printing mechanism and a supply of toner. At five percent page coverage, a toner cartridge prints approximately 2500 pages. However, a toner cartridge should print more pages if it regularly prints pages with less coverage, such as short memos. The cartridge might print fewer pages if heavy or bold print is used. For best results, always use a toner cartridge before the expiration date stamped on the toner cartridge box.
Refilled toner cartridges
Although Hewlett-Packard does not prohibit the use of refilled toner cartridges during the warranty period or while the printer is under a maintenance contract, it is not recommended for the following reasons:
z
Repairs resulting from the use of refilled toner cartridges are not covered under Hewlett-Packard warranty or maintenance contracts. Hewlett-Packard has no control or process to ensure that a refilled toner cartridge functions at the high level of reliability of a new HP LaserJet toner cartridge. Hewlett-Packard also cannot predict the long-term reliability effect on the printer from using different toner formulations found in refilled cartridges. The print quality of HP LaserJet toner cartridges influences the customer's perception of the printer. Hewlett-Packard has no control over the actual print quality of a refilled toner cartridge.
z
z
Recycling of toner cartridges
In order to reduce waste, Hewlett-Packard offers a recycling program. Cartridge components that do not wear out are recycled. Plastics and other materials are recycled. Hewlett-Packard pays the shipping costs from the user to the recycling plant (within the United States). To join this recycling effort, follow the instructions inside the toner cartridge box.
10 Chapter 1 - Product information
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2
Removal and replacement
Chapter contents
Required tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Before performing service . . . . . . . . . . . . . . . . . . . . . . 13 Toner cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Parts removal order . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Toner cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Left side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 ECU PCB fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Connector PCB Assembly . . . . . . . . . . . . . . . . . . . . . . 30 Front cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Toner cartridge door . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Front guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Internal assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Transfer roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Laser/scanner assembly. . . . . . . . . . . . . . . . . . . . . . . . 40 Output rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Face-up roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Right plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Right plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Right plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 48
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Chapter contents 11
Pickup assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Pickup roller assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . .53 Paper lift plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . .54 Left plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55 Bottom assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56 ECU pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56 Paper-feed assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
12 Chapter 2 - Removal and replacement
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Removal and replacement strategy
This chapter documents the removal and replacement of field replaceable units (FRUs) only. Replacement is generally the reverse of removal. Occasionally, notes and hints are included to provide directions for difficult or critical replacement procedures. WARNING! Unplug the power cord from the power source before servicing the printer. Failure to follow this warning can result in personal injury or damage to the printer. Certain functional checks during troubleshooting require power supplied to the printer. However, power should be disconnected when removing assemblies. Never operate the printer with the laser/scanner assembly exposed. The reflected beam, although invisible, can damage your eyes. When servicing the printer, replace the top cover before operating the printer. CAUTION The printer contains electrostatic discharge (ESD) sensitive components. Always perform service work at an ESD-protected workstation. If an ESD-protected workstation is not available, discharge body static and ground the printer chassis before servicing the printer.
Required tools
z z z z
#2 Phillips screwdriver with magnetic tip Small flat-blade screwdriver Needle-nose pliers penlight (optional)
Note
Use of a Posidrive screwdriver damages screw-heads on the printer. Use a #2 Phillips screwdriver. To install a self-tapping screw, first turn it counterclockwise to align it with the existing thread pattern, then carefully turn it clockwise to tighten. Do not overtighten.
Hint
Before performing service
z z z
Unplug the power cable and remove all media from the printer. Place the printer on an ESD mat or discharge body static and ground the printer chassis. Remove the toner cartridge and media tray. See "Toner cartridge" on page 15 and "Media tray" on page 16. Removal and replacement strategy 13
Q1342-90910
Parts removal order
Use the following diagram to determine the order in which parts must be removed.
Toner cartridge Media tray Cable pod Left side cover Back cover ECU PCB fuse Output sensor Motor Right cover Transfer roller Solenoid Top Cover Connector PCB LED status panel Front cover Toner cartridge door Front guide Fuser assembly (see note) Right plate assembly Pickup assembly Pickup roller Paper lift Left plate assembly Laser/scanner assembly Fuser assembly Face-down roller Face-up roller ECU pan Paper feed assembly
Note
The fuser assembly is intentionally listed twice.
14 Chapter 2 - Removal and replacement
Q1342-90910
Toner cartridge
CAUTION To prevent damage, do not expose the toner cartridge to light. Cover it with a piece of paper. You will feel resistance when you open the toner cartridge door. 1 2 Open the toner cartridge door. Remove the toner cartridge.
Note
Figure 4.
Remove the toner cartridge
Q1342-90910
Removal and replacement strategy 15
External assemblies
Media tray
1 2 Lift off the media tray cover (callout 1). Slightly tilt up the media tray and pull it away from the printer.
1
Figure 5.
Remove the media tray
16 Chapter 2 - Removal and replacement
Q1342-90910
Cable pod
1 2 Turn the two pod thumbscrews counterclockwise until they turn freely. Grasp the pod, and gently pull it away from the printer.
Figure 6. Hint
Remove the cable pod For easier installation, start tightening the top thumbscrew (do not fully tighten) and then tighten the bottom thumbscrew when replacing the cable pod. Make sure to fully tighten both thumbscrews.
Q1342-90910
External assemblies 17
Left side cover
1
z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Open the toner cartridge door. Remove the single left-cover retaining screw (callout 1). Pull out on the rear of the cover and rotate it away from the printer.
2 3 4
1
Figure 7. Hint
Remove the left side cover It might be necessary to release the left side cover-locking tab found under the printer. The left-side retaining screw is slightly longer than similar screws used in the printer. Keep this screw separated from other screws while servicing the printer to avoid misplacing it.
Hint
18 Chapter 2 - Removal and replacement
Q1342-90910
Back cover
1
z
Remove the following assemblies: Toner cartridge, media tray, cable pod, and left side cover. See "Toner cartridge" on page 15 through "Left side cover" on page 18. Open the straight-through output door (callout 1). Remove the single screw (callout 2) from the back of the printer.
2 3
2 2 1
Figure 8.
Open the straight-through output door
Q1342-90910
External assemblies 19
4
Release the two locking tabs (not shown). The left tab is located under the printer and the right tab is located on the right side of the printer, near the cable pod port. Press down and hold the two green jam-release levers (callout 3) and pull the cover off of the printer.
5
3 1
Figure 9. CAUTION
Remove the back cover When replacing the back cover, verify that the bottom left retainer tab (under the printer) is inside the printer chassis. This tab can be broken if not properly inserted into the printer chassis.
20 Chapter 2 - Removal and replacement
Q1342-90910
ECU PCB fuse
1
z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side and back covers. See "Left side cover" on page 18 through "Back cover" on page 19. Grasp the ECU PCB fuse (callout 1) and pull it out of the mounting clips.
2
1
Figure 10. WARNING!
Remove the ECU PCB fuse To protect against the risk of fire, always replace the ECU PCB fuse with the same type and rating fuse. Fuse type and rating is printed on the ECU PCB next to the fuse. Purchase this fuse at a local hardware store or from an electrical component supplier.
Note
Q1342-90910
External assemblies 21
Output sensor
1
z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side and back covers. See "Left side cover" on page 18 through "Back cover" on page 19. Disconnect the output sensor (callout 1) wire harness (at the ECU end). Unlace the harness from the harness lance points. Remove the single output sensor mounting screw and remove the sensor.
2 3
1
Figure 11.
Remove the output sensor
22 Chapter 2 - Removal and replacement
Q1342-90910
Motor
1
z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side and back covers. See "Left side cover" on page 18 through "Back cover" on page 19.
Hint
Removing the fuser is not necessary, but doing so will make replacing the motor easier. See "Fuser assembly" on page 42. 2 3 Disconnect the motor cable connector (callout 1) on the side of the motor. Remove the two screws (callout 2) from the motor and lift the motor out of the printer.
2
2 1
Figure 12. Note
Remove the motor (fuser removed for clarity) When replacing the motor, verify that the connector (callout 1) is located toward the front of the printer.
Q1342-90910
External assemblies 23
Right side cover
1
z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side and back covers. See "Left side cover" on page 18 through "Back cover" on page 19. Open the toner cartridge door. Remove one screw (callout 1) on the back of the printer.
2 3
1
Figure 13.
Remove the right side cover mounting screw
24 Chapter 2 - Removal and replacement
Q1342-90910
4
Lift the right side of the printer and release the tab (callout 2) on the bottom of the cover.
2
Figure 14.
Release the right side cover tab
Q1342-90910
External assemblies 25
5
While continuing to press the release tab, grasp the top of the cover and rotate it away from the printer.
Figure 15.
Remove the right side cover
26 Chapter 2 - Removal and replacement
Q1342-90910
Solenoid
1
z z
Remove the following assemblies: Toner cartridge, media tray and formatter pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, and right side covers. See "Left side cover" on page 18 through "Right side cover" on page 24. Unplug the brown solenoid wire connector (callout 1) from the ECU and carefully unwind the solenoid harness from the harness lance points (callout 2).
2
2
1 2
Figure 16. Disconnect the solenoid wire harness
Q1342-90910
External assemblies 27
3 4 5
Remove the screw (callout 3) on the solenoid. Gently thread the solenoid cable through the hole (callout 4) in the right side plate. Lift the solenoid off of the printer.
2 3
2 4
Figure 17.
Remove the solenoid
28 Chapter 2 - Removal and replacement
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Top cover
1
z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17 Left side, back, and right side covers. See "Left side cover" on page 18 through "Right side cover" on page 24. Open the toner cartridge door. Loosen, but do not remove, the two screws (callout 1) on the back of the printer. Remove the two screws (callout 2) on the top of the printer. Lift the cover off of the printer.
2 3 4 5
2 2 1
Figure 18.
Remove the top cover
Q1342-90910
External assemblies 29
Connector PCB Assembly
1
z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Open the toner cartridge door. Disconnect the laser scanner ribbon cable (at the laser/scanner end), laser scanner wire harness, LED status panel wire harness, and ECU ribbon cable. Remove the three connector PCB assembly mounting screws (callout 1), and remove the assembly.
2 3
4
1
Figure 19.
Remove the connector assembly
30 Chapter 2 - Removal and replacement
Q1342-90910
LED status panel
1
z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Open the toner cartridge door. Disconnect the status panel cable (callout 1) from the connector assembly. Unlace the harness from the harness clip. Remove two screws (callout 2) from the top of the control panel assembly. Lift and remove the panel assembly.
2 3 4 5
2
3
1
Figure 20. Hint
Remove the LED status panel When replacing the LED status panel assembly, verify that the locator tab (callout 3) is correctly positioned in the provided hole.
Q1342-90910
External assemblies 31
Front cover
1
z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Close the toner cartridge door. Loosen two screws (one shown in callout 1), one on each side of the cover.
2 3
2 1
Figure 21.
Remove the front cover mounting screws
32 Chapter 2 - Removal and replacement
Q1342-90910
4 5
Pull forward on the top of the front cover to release the three front cover tabs (callout 2). Slightly raise the front of the printer and rotate the top of the cover toward you to release the tabs on the bottom of the front cover. Remove the front cover.
2 1
Figure 22.
Remove the front cover
Q1342-90910
External assemblies 33
Toner cartridge door
1
z z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Front cover. See "Front cover" on page 32. Open the toner cartridge door. Press the two small tabs (callout 1) on the inside of the right connecting link to release it. Repeat on the left side.
2 3 4
1 2
Figure 23. Release the toner cartridge door connecting links
34 Chapter 2 - Removal and replacement
Q1342-90910
5
Unhook the right side toner cartridge door hinge and slide the toner cartridge door toward the left to remove it.
2
Figure 24. CAUTION
Remove the toner cartridge door When the cartridge door is replaced, the hinge must be behind the door stop (callout 2). The door will not close if the door is installed with the hinge in front of or on top of the door stop. After the toner cartridge door is removed, it is easy to remove the two connecting links.
Hint
Q1342-90910
External assemblies 35
Front guide
1
z z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Front cover and toner cartridge door. See "Front cover" on page 32 through "Toner cartridge door" on page 34. Remove the two front guide mounting screws (callout 1).
2
1
Figure 25.
Remove the front guide assembly
36 Chapter 2 - Removal and replacement
Q1342-90910
3
Release the two right side front guide tabs (callout 2).
2 1
Figure 26.
Release the front guide assembly tabs (right side)
Q1342-90910
External assemblies 37
4 5
Release the two front guide tabs on the left side (callout 3). Remove the front guide assembly.
3 1
Figure 27.
Release the front guide assembly tabs (left side)
38 Chapter 2 - Removal and replacement
Q1342-90910
Internal assemblies
Transfer roller
1
z
Remove the following assemblies: Toner cartridge and media tray. See "Toner cartridge" on page 15 through "Media tray" on page 16. Use needle-nose pliers to gently squeeze the two small tabs on the transfer roller. Lift the transfer roller up, slide it to the right, and lift it out of the printer.
2 3
CAUTION
Skin oils can damage the transfer roller sponge. Do not touch the black transfer roller sponge.
Figure 28. Hint
Remove the transfer roller Do not misplace the small grounding spring that is underneath the right side of the transfer roller.
Q1342-90910
Internal assemblies 39
Laser/scanner assembly
1
z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29.
CAUTION
Never operate the printer with the laser/scanner assembly exposed. The reflected beam, although invisible, can damage your eyes. When servicing the printer, replace the top cover before operating the printer. 2 3 Disconnect the ribbon cable from its socket (callout 1) on the laser/scanner. Disconnect the wire harness cable connector (callout 2) from the connector assembly and unlace the harness from the cable lance.
1
2
Figure 29.
Disconnect the laser/scanner harnessing
40 Chapter 2 - Removal and replacement
Q1342-90910
4
Release the two shutter-retaining tabs (callout 3) and remove the shutter and shutter spring.
CAUTION
Use care when releasing the shutter-retaining tabs. The tabs are plastic and can be broken. Only bend the tabs enough to release the shutter lever. 5 Remove the four screws (callout 4) that fasten the scanner to the printer chassis and remove the laser/scanner.
4
3
Figure 30. CAUTION
Remove the laser/scanner When replacing the laser/scanner, verify that it is fully seated on the printer chassis. The laser/scanner can be damaged when the mounting screws are tightened if it is not fully seated. Insert the spring into the hole on the laser/scanner before you snap the shutter lever back into place.
Hint
Q1342-90910
Internal assemblies 41
Fuser assembly
1
z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Remove two screws (callout 1) from the right fuser bracket. Remove a third screw (callout 2) from behind the large gear on the right fuser plate. Rotate the gear counter clockwise to align a hole in the gear with the screw-head. Remove the bracket.
2 3
4
2 1
2
Figure 31.
Remove the right fuser bracket
42 Chapter 2 - Removal and replacement
Q1342-90910
5 6
Remove three screws (callout 3) from the left fuser bracket. Remove the bracket.
3 1
Figure 32.
Remove the left fuser bracket
Q1342-90910
Internal assemblies 43
7
Remove two screws (one shown in callout 4), one from each side of the printer (right side shown).
4 1
Figure 33.
Remove the fuser mounting screws
44 Chapter 2 - Removal and replacement
Q1342-90910
8 9
Unplug the fuser cable connector (callout 5) by pressing and releasing the clip on the back of the connector. Unplug four smaller cable connectors (callout 6) from the ECU and remove the harnesses from the fuser harness lance points.
10 Unplug the spade connector (callout 7). 11 Slightly spread the chassis to release the fuser locator pins and then lift the fuser assembly out of the printer.
5 2 2 7 2 6
Figure 34. Remove the fuser assembly
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Internal assemblies 45
Output rollers
Face-down delivery assembly
1
z z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Fuser assembly. See "Fuser assembly" on page 42. Remove two screws (callout 1) and lift the face-down delivery assembly away from the fuser assembly.
2
1
Figure 35.
Remove the output rollers
46 Chapter 2 - Removal and replacement
Q1342-90910
Face-up roller
1
z z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Fuser assembly. See "Fuser assembly" on page 42. Turn the fuser assembly over and remove the gear (callout 1) from the face-up roller Release the tab (callout 2) on the face-up roller bushing and rotate the bushing forward until the pin releases. Remove the bushing. Slide the face-up roller toward the gear end until the roller clears the roller retainer (opposite the gear end), and lift it out of the fuser assembly.
2 3
4
1 2 2
Figure 36. Note
Remove the face-up rollers When replacing the face-up roller bushing, verify that the locking pin is seated correctly to prevent the roller from slipping out of the roller retainer.
Q1342-90910
Internal assemblies 47
Right plate assembly
1
z z z z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Unlace the solenoid wire harness. See "Solenoid" on page 27. Front cover, toner cartridge door, and front guide. See "Front cover" on page 32 through "Front guide" on page 36. Fuser assembly. See "Fuser assembly" on page 42. Lift the small white tab to release the clutch, and slide the clutch to the left (toward the pickup roller).
2
Hint
Keep the two halves of the clutch gear together to avoid losing the internal clutch spring.
Figure 37.
Remove the gear-clutch assembly
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3 4
Remove seven mounting screws (callout 2). if the motor is installed, disconnect the motor wire harness. Apply slight pressure and pull the right plate assembly off of the printer.
2
Figure 38.
Remove the right plate assembly mounting screws
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Internal assemblies 49
Pickup assembly
1
z z z z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Front cover, toner cartridge door, and front guide. See "Front cover" on page 32 through "Front guide" on page 36. Fuser assembly. See "Fuser assembly" on page 42. Right plate assembly. See "Right plate assembly" on page 48. Remove the side pickup assembly mounting screw (callout 1).
2
1
Figure 39.
Remove the pickup assembly mounting screw
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3
Remove the two top mounting screws (callout 2).
2
Figure 40.
Remove the top pickup assembly mounting screws
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Internal assemblies 51
4
Lift the metal shield (callout 3) straight up and remove it from the printer.
2 3
Figure 41.
Remove the metal shield
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Pickup roller assembly
1
z z z z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Front cover, toner cartridge door, and front guide. See "Front cover" on page 32 through "Front guide" on page 36. Fuser assembly. See "Fuser assembly" on page 42. Right plate assembly, and pickup assembly. See "Right plate assembly" on page 48 through "Pickup assembly" on page 50. Release the locking tab on the right side pickup roller cam (callout 1) and slide the cam to the left about one inch. Slide the roller shaft toward the right until the left end releases. Carefully pull the left end of the shaft toward you until it clears the left side of the chassis. Remove the pickup roller assembly.
2 3 4
1 2
Figure 42.
Remove the pickup roller assembly
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Internal assemblies 53
Paper lift plate assembly
1
z z z z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Front cover, toner cartridge door, and front guide. See "Front cover" on page 32 through "Front guide" on page 36. Fuser assembly. See "Fuser assembly" on page 42. Right plate assembly and pickup assembly. See "Right plate assembly" on page 48 through "Pickup assembly" on page 50. Grasp the large plastic tabs (callout 1) on each side of the paper lift plate and rotate it forward.
2
CAUTION
To avoid damaging them, do not pull on the paper guides. 3 Lift the paper lift plate up and out of the bushings (callout 2).
1 2 2 3
2
Figure 43. Hint
Remove the paper lift plate assembly When replacing the paper lift plate, verify that the lift plate springs (callout 3) are fully seated onto the circular spring positioning pedestals.
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Left plate assembly
1
z z z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, right side, and top covers. See "Left side cover" on page 18 through "Top cover" on page 29. Front cover, toner cartridge door, and front guide. See "Front cover" on page 32 through "Front guide" on page 36. Fuser assembly. See "Fuser assembly" on page 42. Disconnect the laser/scanner ribbon cable (at the laser/scanner end). Disconnect the laser/scanner wire harness and the ECU ribbon cable from the connector PCB. Remove the laser/scanner harness from the wire clip. Remove the eight mounting screws (callout 1) and lift the left plate assembly off of the printer.
2
3
1
Figure 44.
Remove the left plate assembly
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Internal assemblies 55
Bottom assemblies
ECU pan
1
z z
Remove the following assemblies: Toner cartridge, media tray, and cable pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, and right side covers. See "Left side cover" on page 18 through "Right side cover" on page 24. Unplug the three spade connectors (callout 1). Disconnect the motor cable connector (callout 2). Unplug the fuser cable connector (callout 3) by pressing and releasing the clip on the back of the connector. Unplug the remaining four wire harness connectors (callout 4) from the ECU.
2 3 4 5
2 1 2
2 3
4 2
Figure 45. Disconnect the ECU wire harnesses
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6 7
Unplug the ribbon cable from the ECU to the connector assembly PCB (callout 5). Remove two screws (callout 6) on each side of the printer (left side shown).
6 2 5 1
Figure 46. Remove the ECU mounting screws
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Bottom assemblies 57
8 9
Gently pull the two sides of the printer away from the ECU pan to release the ECU pan. Slide the ECU pan out and away from the printer.
Figure 47.
Remove the ECU pan
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10 Remove the motor wire harness from the wire clip (callout 7). 11 Remove the three ECU PCB mounting screws (callout 8). 12 Remove the two power cord receptacle plate mounting screws (callout 9). 13 Lift the ECU PCB off of the ECU pan.
7
8 1
9 2
Figure 48. Note
Remove the ECU PCB from the pan The ECU board is replaced as a single unit. Only soldered cables ship with the replacement board. If other cables are damaged during removal, you will have to order replacements.
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Bottom assemblies 59
Paper-feed assembly
1
z z z z
Remove the following assemblies: Toner cartridge, media tray and formatter pod. See "Toner cartridge" on page 15 through "Cable pod" on page 17. Left side, back, and right side covers. See "Left side cover" on page 18 through "Right side cover" on page 24. Right plate assembly. See "Right plate assembly" on page 48. ECU pan. See "ECU pan" on page 56.
Note
Do not remove the gear shield instead of the right plate assembly. The gear shield retains some of the gears. Removing the gear shield can cause loose gears and springs to be misplaced. 2 3 4 Unwind the optic paper sensor and solenoid cables from the cable guides (callout 1) on the paper-feed mechanism. If necessary, remove one screw (callout 2) from the paper sensor PCB assembly and remove the sensor PCB. Remove the two mounting screws (callout 3) from the paper-feed mechanism.
2 3
2 1
Figure 49.
Remove wire harnesses
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5
Apply slight pressure to disengage the paper-feed assembly bushings from the roller shaft (callout 4). Lift the paper-feed assembly up and out of the printer.
2 4 2 6 2 5
Figure 50. Hint
Remove the paper-feed assembly When replacing the paper feed assembly, insert the two tabs (callout 5) on the paper-feed assembly into the provided recesses (callout 6) near the roller. Insert the bottom of the sensor flag into the hole in front of the paper-feed roller shaft and verify that the sensor flag moves freely.
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Bottom assemblies 61
6 7
Use needle-nose pliers to push the two tabs away from the end of the paper-feed roller shaft. Pull the paper-feed roller shaft away from the gear end and remove it.
Figure 51.
Release the paper-feed roller
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3
Troubleshooting
Chapter contents
Basic troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 LED status lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Checking the toner cartridge . . . . . . . . . . . . . . . . . . . . 71 Solving image-quality problems . . . . . . . . . . . . . . . . . . 72 Solving paper-feed problems . . . . . . . . . . . . . . . . . . . . . . . . . 77 Functional checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Engine test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Half self-test functional check. . . . . . . . . . . . . . . . . . . . 81 Drum rotation functional check . . . . . . . . . . . . . . . . . . . 82 Heating-element check. . . . . . . . . . . . . . . . . . . . . . . . . 83 High-voltage power supply check. . . . . . . . . . . . . . . . . 84 Paper-path check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Troubleshooting tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Repetitive image defect ruler . . . . . . . . . . . . . . . . . . . . 87 Location of ECU Connectors . . . . . . . . . . . . . . . . . . . . 88
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Chapter contents 63
Basic troubleshooting
Table 7. Basic troubleshooting
# Verification steps Does the printer turn on successfully?
When the product is connected to a grounded power source, the printer motor should continuously rotate for about six seconds.
Possible problems
Power is not being supplied to the printer. There are open wire harness connectors. There are pinched or frayed wire harness wires. The motor or ECU has failed.
Solutions
1. Verify that the product is plugged in. 2. Verify that the power cable is functional and the cable is plugged into the correct power source (110 V or 220 V ac). 3. Verify that FU102 (the ECU PCB fuse) on the ECU is not open. 4. Verify that the fuser levers are in the up position. 5. Verify that the printer door is closed. 6. Verify that the motor connector is seated into the ECU. 7. Verify that the motor is correctly mounted on the printer chassis. 8. Check for and replace pinched or frayed wire harness wires. 9. Replace the motor. 10. Replace the ECU. The engine-test was successful.
1
2
Do engine tests print?
Print an engine test. (See page 79.)The engine test should print without paper-feed problems or print-quality problems.
The printed page is filled with evenly spaced horizontal lines (approximately 1 mm apart). The engine test button is pressed, but nothing happens.
1. The toner cartridge is missing or the toner cartridge door is open. Install a toner cartridge and/or close the door. 2. A faulty toner-cartridge-to-ECU connection exists. Verify that all connectors to the ECU are firmly seated and contacts are clean. 3. A faulty connector-PCB-to-ECU connection exists. Replace the connector assembly. 1. Verify that the laser/scanner connectors are fully seated. 2. Replace the laser/scanner. 1. Verify that the fuser wire connectors are fully seated. 2. Replace the fuser.
The motor rotates on and off (about 1 second), and then stops (no paper feed). The motor rotates on, off, on, off in short cycles, and then stops (no paper feed).
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Table 7. Basic troubleshooting (continued)
# Verification steps Do engine tests print? (continued) Possible problems
The printer attempts to pick up paper three times and then the motor stops (no paper feed). The printer attempts to pick up paper three times, and the paper feeds but comes out blank. The printer attempts to pick up paper three times and the laser/scanner emits a high-pitched whine, but the motor does not turn. The printed page is filled with evenly spaced horizontal lines, but the toner can be easily smeared.
Solutions
1. The media tray is empty. Place media in the tray. 2. The printer is dirty. Clean the printer. 3. Replace the pickup roller. 4. Replace the paper pickup assembly 1. the paper-feed assembly connections are faulty. Verify that the all paper-feed assembly connectors to the ECU are firmly seated. 2. Replace the paper-feed assembly. 1. Verify that the motor connector is firmly seated. 2. Replace the motor
2
1. Make sure that the media meets specifications detailed in the Print Media Guide for the HP LaserJet printer family. 2. A faulty fuser assembly power connection exists. Verify that the fuser power connectors are firmly seated. 3. Replace the fuser. 1. Verify that the output sensor (on the back of the fuser) connector is firmly seated at the ECU end. 2. Replace the output sensor
The engine-test page begins to print, bu