HP LaserJet 9055mfp-9065mfp Service Manual.pdf

LaserJet 9055 mfp

LaserJet 9065 mfp

service manual

hp LaserJet 9055mfp (Q3631A)

hp LaserJet 9065mfp (Q3632A)

service manual

Company, L.P.

Reproduction, adaptation or translation without

prior written permission is prohibited, except as

allowed under the copyright laws.

The information contained herein is subject to

change without notice.

The only warranties for HP products and services

are set forth in the express warranty statements

accompanying such products and services.

Nothing herein should be construed as

constituting an additional warranty. HP shall not be

liable for technical or editorial errors or omissions

contained herein.

Part number: Q3631-90908

Edition 1, 11/2003

Trademark Credits

Microsoft ® , Windows ® , and Windows NT ® are

U.S. registered trademarks of Microsoft

Corporation.

Contents

1 How to use this manual

Tray 1 paper feed/automatic duplex

unit (ADU) pre-registration

drive section . . . . . . . . . . . . . . . . . . . 31

Charging and transfer/separation wire

cleaning drive section . . . . . . . . . . . . 32

Automatic Duplex Unit (ADU)

conveyance drive section . . . . . . . . . 33

Paper exit drive section . . . . . . . . . . . . . . 34

Toner supply drive section . . . . . . . . . . . . 34

Optics drive section . . . . . . . . . . . . . . . . . 35

Manual contents . . . . . . . . . . . . . . . . . . . . . . . . . 2

Manual organization . . . . . . . . . . . . . . . . . . . . . . 2

2 Safety

Safety and important warning items . . . . . . . . . . 4

Important notices. . . . . . . . . . . . . . . . . . . . . 4

Description items for Warning, Caution,

and Note . . . . . . . . . . . . . . . . . . . . . . . 4

Safety warnings. . . . . . . . . . . . . . . . . . . . . . . . . . 5

Modifications not authorized by hp . . . . . . . 5

Power supply. . . . . . . . . . . . . . . . . . . . . . . . 7

Installation requirements . . . . . . . . . . . . . . 10

Measures to take in case of an accident. . 15

Conclusion . . . . . . . . . . . . . . . . . . . . . . . . 15

Regulatory statements . . . . . . . . . . . . . . . . . . . 16

Safety information . . . . . . . . . . . . . . . . . . . . . . . 16

Safety circuits . . . . . . . . . . . . . . . . . . . . . . 16

Overall protection circuit . . . . . . . . . . . . . . 16

Safety labels on the MFPs . . . . . . . . . . . . . . . . 19

Scanner section . . . . . . . . . . . . . . . . . . . . 21

Laser/scanner assembly . . . . . . . . . . . . . . 21

Rear cover. . . . . . . . . . . . . . . . . . . . . . . . . 21

4 MFP unit explanation

External section . . . . . . . . . . . . . . . . . . . . . . . . 40

Composition . . . . . . . . . . . . . . . . . . . . . . . 40

Drive section . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Composition . . . . . . . . . . . . . . . . . . . . . . . 41

Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 41

M2 (drum) control . . . . . . . . . . . . . . . . . . . 42

M4 (fuser) control . . . . . . . . . . . . . . . . . . . 42

Scanner section . . . . . . . . . . . . . . . . . . . . . . . . 44

Composition . . . . . . . . . . . . . . . . . . . . . . . 44

Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 44

M11 (scanner) control . . . . . . . . . . . . . . . . 45

Exposure control . . . . . . . . . . . . . . . . . . . . 48

Original read control . . . . . . . . . . . . . . . . . 48

APS control. . . . . . . . . . . . . . . . . . . . . . . . 49

AE control . . . . . . . . . . . . . . . . . . . . . . . . . 51

Laser scanner unit . . . . . . . . . . . . . . . . . . . . . . 52

Composition . . . . . . . . . . . . . . . . . . . . . . . 52

Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 52

M15 (polygon) control . . . . . . . . . . . . . . . . 53

Image write control . . . . . . . . . . . . . . . . . . 53

Drum unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Composition . . . . . . . . . . . . . . . . . . . . . . . 56

Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 56

Separation claw control . . . . . . . . . . . . . . 57

Paper guide plate control . . . . . . . . . . . . . 57

Corona unit section . . . . . . . . . . . . . . . . . . . . . . 58

Composition . . . . . . . . . . . . . . . . . . . . . . . 58

Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 58

Charging control . . . . . . . . . . . . . . . . . . . . 58

Transfer/separation control . . . . . . . . . . . . 59

3 MFP overview

Overview of system . . . . . . . . . . . . . . . . . . . . . . 24

hp LaserJet 9055mfp/9065mfp product

specifications. . . . . . . . . . . . . . . . . . . . . . . 25

Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Functions. . . . . . . . . . . . . . . . . . . . . . . . . . 25

Applicable copy paper. . . . . . . . . . . . . . . . 26

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Particulars of machine. . . . . . . . . . . . . . . . 26

Maintenance and life . . . . . . . . . . . . . . . . . 26

Environmental conditions . . . . . . . . . . . . . 26

Central cross-sectional view . . . . . . . . . . . . . . . 27

Drive system diagram . . . . . . . . . . . . . . . . . . . . 28

Fuser/web drive section . . . . . . . . . . . . . . 28

Drum drive section . . . . . . . . . . . . . . . . . . 29

Developing drive section . . . . . . . . . . . . . . 29

Paper feed/vertical conveyance/tray

up drive sections . . . . . . . . . . . . . . . . 30

ENWW

iii

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