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Cut Sheet Printers
Maintenance Manual
Model C40D

E1195
HP Part No. C4672-90005
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.
Hewlett-Packard assumes no responsibility for the use or reliability of its software on
equipment that is not furnished by Hewlett-Packard.
This document contains proprietary information which is protected by copyright. All
rights are reserved. No part of this document may be photocopied, reproduced, or trans-
lated to another language without the prior written consent of Hewlett-Packard Company.
The information contained in this document is subject to change without notice.
Hewlett-Packard Company
System Peripherals Operation
MS 44MC
19111 Pruneridge Avenue
Cupertino, CA 95014

Printing History
New editions are complete revisions of the manual. Update pages, which are issued
between editions, contain additional and replacement pages to be merged into the manual
by the customer. The date on the title page changes only when a new edition or a new
update is published. No information is incorporated into a reprinting unless it appears as a
prior update; the edition does not change when an update is incorporated.
The software code printed alongside the date indicates the version level of the software
product at the time the manual or update was issued. Many product updates and fixes do
not require manual changes and, conversely, manual corrections may be done without
accompanying product changes. Therefore, do not expect a one-to-one correspondence
between product updates and manual updates.
Edition 1 . . . . . . . . . . . . . . . . . . . . . . . . . . .November 1995
Edition 2. . . . . . . . . . . . . . . . . . . . . . . . . . .June 1999

ii June 1999
Preface
The C40D Maintenance Manual contains all the information needed to maintain and ser-
vice Hewlett Packard C40D printers. The C40D printer series are high-speed, non-impact
printers utilizing electrophotographic imaging technology.
The information in this manual is for authorized field representatives who are familiar
with basic printer operations. It serves as a supplement to training classes and provides a
basis for discussion with regional field service engineers and customer support representa-
tives.

Using This Manual
This manual is organized into the following sections:

Section 1, Troubleshooting
Reviews the organization of the manual, the way the printer works, and how to trouble-
shoot the printer, including some standard procedures to follow when troubleshooting.
This chapter also includes a chart detailing exactly what each causes each error code, illus-
trations of all sensors in the printer, and a list of abbreviations used throughout the manual.

Section 2, TAG Cross- Reference Tables
Provides cross-reference tables; look up specific printer problem description (in either the
mechanical malfunction, error code, or print quality description tables), then turn to the
TAG indicated on the chart to troubleshoot the problem.

Section 3, Troubleshooting Analysis Guides
Detailed step-by-step procedures to help you isolate and resolve specific printer problems.
If you are not sure which TAG to start with, begin with the overview, TAG 001.

Section 4, Print Quality Samples
Shows print test patterns indicating specific problems, and referencing the TAG that treats
each problem.

Section 5, Diagnostic Tests
Reviews each printer software diagnostic.

Section 6, Wiring Diagrams and Electrical Data
Shows printer schematics and locations of individual components.

Section 7, Removal/Replacement Procedures
Outlines procedures to follow when removing and replacing printer parts, also called
FRUs (Field-Replaceable Units).

June 1999 iii
Section 8, Options
Provides information about the optional High Capacity Input and High Capacity Output
bins.

Section 9, General Printer Maintenance
Reviews printer maintenance procedures to complete during service calls.

Index
Provides a list of references to topics mentioned in this manual.

Other Manuals
The C-Series Illustrated Parts Catalog shows every FRU and CRU (customer-replaceable
unit) in the printer, including part number information. This information is frequently
updated.
The C40D Installation Manual, C4672-90007, guides you through unpacking, setup, test-
ing, and network configuration of your C40D printer.
The C40D Operator's Manual, C4672-90006, contains all the information needed to oper-
ate Hewlett Packard C40D printers.
The C40D Technical Reference Manual, C4672-60012, is a complete guide to using fonts
and the PJL and PostScript emulations on the C40D. It also documents aspects of printer
usage in detail.
The Cut Sheet Printers Paper Specifications Guide, C4672-90002, explains the various
kinds of papers usable in the printer, how to care for them, and how to minimize paper-
related problems with the C40D.

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