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HP LaserJet 1100A Service Manual © 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 C4224-90962 First edition, October 1998 Trademark Credits Adobe and PostScript are trademarks of Adobe Systems Incorporated which may be registered in certain jurisdictions. Windows is a U.S. registered trademark of Microsoft Corporation. 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 damages 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 wall outlets. 2 C4224-90962 Conventions This manual uses the following conventions: The names of major printer parts and assemblies are Capitalized. Color is used to emphasize items which are important to the material under discussion. Bold is used for emphasis, particularly in situations where italic type would be confusing. Italic type is used to indicate related documents or emphasis. NOTE: Notes contain important information set off from the text. CAUTION: Caution messages alert you to the possibility of damage to equipment or loss of data. WARNING! Warning messages alert you to the possibility of personal injury. C4224-90962 3 Chapter Descriptions 1 Printer Specifications Contains printer features and product overview, printer specifications, and required safety and compliance statements. 2 Product Operation Contains descriptions of the Control Panel, printer key functionality, scanner Control Panel, paper handling, toner cartridge, and warranty statement. 3 Functional Overview Contains details about basic functions, printer functions, Engine Control Unit (ECU) and power system, formatter system, image formation system, printer paper feed system, optional document scanner system, and basic sequence of operation. 4 Removal and Replacement Contains step-by-step procedures for replacing field replaceable units (FRUs) in the printer. 5 Troubleshooting/Maintenance Contains details basic troubleshooting steps, fatal errors and accessory errors, image formation troubleshooting steps, solving image quality problems, cleaning procedures, functional checks, ServiceMode functions, and troubleshooting tools. 6 Parts and diagrams Contains exploded view drawings and part number listings for all replaceable parts in the printer. Contains two replaceable parts tables: one sorted alphabetically by part name and one sorted numerically by part number. Both tables are cross referenced to the