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May 1998 Edition HP LaserJet Family Quick Reference Service Guide Volume I HP LaserJet Family Quick Reference Service Guide Volume I © Copyright Hewlett-Packard Company 1998 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. Publication number 5021-8943 First edition, May 1998 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. Trademark credits Adobe and PostScript are registered trademarks of Adobe Systems, Inc., which may be registered in certain jurisdictions. Microsoft® is a U.S. registered trademark of Microsoft Corporation. MS-DOS® is a U.S. registered trademark of Microsoft Corporation. UNIX is a registered trademark in the United States and other countries, licensed exclusively through X/Open Company Limited. Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho 83714 U.S.A. Contents 1 2 3 4 5 6 7 8 9 Control panel messages . . . . . . . . . . . . . . . . . . . . . . . 7 Service mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Input/Output (I/O) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 Media specifications . . . . . . . . . . . . . . . . . . . . . . . . 107 Toner cartridge information . . . . . . . . . . . . . . . . . . 121 Printer options and user replaceable parts . . . . . . 131 Service parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 Summary of service notes and technical tips . . . . 197 10 Image defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273 11 Wiring diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313 12 Services, support, and training . . . . . . . . . . . . . . . 335 13 Hewlett-Packard LaserJet Companion . . . . . . . . . . 343 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351 EN iii Ordering Other Manuals This HP LaserJet Family Quick Reference Service Guide was created to help the LaserJet Service Engineer quickly troubleshoot common printer problems. While this reference is intended to provide all of the information the Service Engineer will need for on-site repair of HP LaserJet products, it is not intended to replace the service manual for any HP LaserJet product. For detailed information about the HP LaserJet products described in this guide, see the user guide or service manual for that product. Ser