HP LaserJet Companion Service Manual.pdf

Service Manual

HP LaserJet Companion

Printer Accessory

(C3989A) Companion

(C3079A) Companion SE

(C4106A) Companion XI

Reproduction, adaptation, or

translation without prior written

permission is prohibited, except

as allowed under the copyright

laws.

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

of merchantability and fitness for

a particular purpose.

WARNING

Electrical Shock Hazard

To avoid electrical shock, use only

supplied power cords and

connect only to properly

grounded (3-hole) wall outlets.

Trademark Credits

Microsoft®and Windows®are

U.S. registered trademarks of

MicrosoftCorporation.PaperPort

is a trademark of Visioneer,Inc.in

the United States and other

countries. OmniPageProfessional

and OmniPageLiteare U.S.

registered trademarks of the

Caere Corporation.

Part number: C3989-90945

First Edition, March 1997

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.

Contents

1 Product Information

Product Description ..........................1-1

System Requirements .......................1-1

Product Features ..........................1-2

Product Specifications .........................1-3

2 Functional Overview

Operation and Timing .........................2-1

Optical System ...........................2-1

Document-Feed System ......................2-2

Control Buttons ............................2-3

Software ...............................2-4

Installation Software ........................2-4

The PaperPort Software ......................2-4

3 Testing

Performing Main Tests .........................3-1

System Requirements .......................3-1

Initializing the NVRAM .......................3-1

Calibrating the Companion .....................3-1

Copying to the Printer .......................3-2

Scanning to the Computer .....................3-2

Performing Additional Tests ......................3-3

Cleaning the HP LaserJet Companion Printer Accessory .......3-4

4 Troubleshooting

Basic Troubleshooting .........................4-1

Power On ..............................4-2

Paper Movement ..........................4-4

Image Transfer Failures ......................4-6

Image Quality Problems ......................4-6

5 Removal and Replacement

Disassembly and Reassembly ....................5-1

Required Tools ...........................5-1

Disassembly ..............................5-2

Reassembly ..............................5-6

6 Parts

Ordering Parts .............................6-1

Documentation Part Numbers ...................6-1

Upper Cover Assembly .......................6-3

External Covers and Panels ....................6-5

Internal Components ........................6-7

Cables ..............................6-10

Power Supply Modules ......................6-10

Contents-1

A Parts Index

List of Figures

Figure 4-1, Voltage Test Points ....................4-2

Figure 5-1, Gear Locations ......................5-8

Figure 5-1, Image Sensor Connector Wire Routing .........5-9

Figure 6-1, Upper Cover Assembly ..................6-2

Figure 6-2, External Covers and Panels ...............6-4

Figure 6-3, Internal Components ...................6-6

Contents-2

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