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Combined Service Manual HP LaserJet 4 / 4M (C2001A / C2021A) HP LaserJet 4 Plus / 4M Plus (C2037A / C2039A) HP LaserJet 5 / 5M /5N (C3916A/C3917A/ C3952A) © Copyright Hewlett-Packard Company 1996 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. Publication number C3916-90984 First edition, March 1996 Printed in USA 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 or merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damaged in connection with the furnishing, performance, or use of this material. WARNING Electrical Shock Hazard To avoid electrical shock, use only supplied power cords and connect only to properly grounded (3-hole) wall outlets. Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho 83714 Conventions This manual uses the following conventions: Unless specifically stated otherwise, information applies to all seven printer models (LaserJet 4/4 Plus/4 M/4 M Plus/5/5 M/5 N). Most procedures are combined for all printers, except where they differ substantially. Color is used to emphasize items which are important to the material under discussion. The names of major printer parts and assemblies are Capitalized. Bold is used for emphasis, particularly in situations where italic type would be confusing. Italic type is used to indicate related documents or emphasis. COMPUTER type indicates text as seen on a computer monitor. DISPLAY type indicates text as seen on the printer's 16 character LCD display panel (LaserJet 4Plus/4MPlus only). [KEYFACE] indicates keys on a computer keyboard or on the printer's control panel. Examples include [Enter], [On Line] and Go. Note Notes contain important information set off from the text. Caution messages alert you to the possibility of damage to equipment or loss of data. CAUTION W A R N I N G ! Warning messages alert you to the possibility of personal injury. i ii Contents 1 Product Information Product Family Information . . . . . . Identification . . . . . . . . . . . . . . Specifications . . . . . . . . . . . . . . . HP LaserJet 4 and 4 Plus . . . . . . . Related Documentation . . . . . . . . . Safety Information . . . . . . . . . . . . . Product and Laser Safety . . . . . . . FCC RFI Statement . . . . . . . . . . Laser Statement (Sweden/Finland) . . Toner Safety . . . . . . . . . . . . . Ozone Statement . . . . . . . . . . . . Doing Business with HP . . . . . . . . . . Technical Assistance . . . . . . . . . HP ASAP 1-800-333-1917 (U.S.) . . . . HP FIRST . . . . . . . . . . . . . . . . HP FIRST, U.S. . . . . . . . . . . . . . HP FIRST, Europe . . . . . . . . . . . HP AUDIO-TIPS . . . . . . . . . . . . HP CompuServ