HP 4600hdn, 4600dtn, 4600dn, 4600n, 4600 Service Manual

hp color LaserJet 4600

4600n, 4600dn, 4600dtn, 4600hdn

service

start

manual

hp color LaserJet 460 0 series printe r

service manual

© Copyright Hewlett-Packard
Company, 2002

All Rights Reserved.
Reproduction, adaptation, or
translation without prior written
permission is prohibited, except
as allowed under the copyright
laws.

Part number: C9660-90901
First Edition, April 2002

Warranty

The information contained in this
document is subject to change
without notice.

Hewlett-Packard makes no
warranty of any kind with respect
to this information. HEWLETT­PACKARD SPECIFICALL Y
DISCLAIMS THE IM PL IED
WARRANTY OF
MERCHANTABILITY AND
FITNESS FOR A PARTICULAR
PURPOSE.

Hewlett-Packard shall not be
liable for any direct, indirect,
incidental, consequential, or other
damage alleged in connection
with the furnishing or use of this
information.

Trademark Credits

Adobe and Adobe Photoshop are
trademarks of Adobe Systems
Incorporated.

CorelDRAW™ is a trademark of
Corel Corporation or Corel
Corporation Limited.

NERGY STAR is a U.S. registered

E
service mark of the United States
Environmental Protection Agency.

®

Microsoft
trademark of Microsoft
Corporation.

Netscape is a U.S. trademark of
Netscape Communications
Corporation.

PANTONE
check-standard trademark for
color.

PostScript is a trademark of
Adobe Systems, Incorporated,
which may be registered in
certain jurisdictions.

TrueType is a U.S. trademark of
Apple Computer, Inc.

UNIX is a registered trademark of
the Open Group.

Windows, MS Windows, and
Windows NT are U.S. registered
trademarks of Microsoft
Corporation.

is a U.S. registered

®

Pantone, Inc.’s

Hewlett-Pack ard Company
11311 Chinden Boulevard
Boise, Idaho 83714 U.S.A.

Conventions

This manual uses the following conventions:

● COLOR is used to emphasize items that are important to the material under discussion.

● Bold is used for menu items to click and for emphasis, particularly in situations where italic type

would be confusing.

● Italic type is used to indicate related documents or emphasis.

● DISPLAY type indicates text as seen on the printer control panel display.

● Commands you use on a computer keyboard or on the printer control panel are shown in

K

EYCAP. Two examples are PAUSE/RESUME and CANCEL JOB.

● COURIER type indicates text that you type on a computer keyboard exactly as shown.

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.

C9660-90901 iii

iv C9660-90901

Contents

1 Printer description

Printer features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Model and serial numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Power and regulatory information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Site requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Space requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Electrical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Supply storage requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Printer specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Printer assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Media requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Selecting print media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Supported media weights and sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Media to avoid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Media that may cause damage to the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Printing on special media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Weight equivalence table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Environmental Product Stewardship Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Protecting the environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Regulatory statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

FCC Regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Laser safety statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Material Safety Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Toner safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Canadian DOC regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

EMI statement (Korea) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

VCCI statement (Japan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Laser statement for Finland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Declaration of Conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

C9660-90901 Contents v

2 Service approach

Service approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Parts and supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Ordering parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Ordering supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Exchange program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

World Wide Web . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

HP Service Parts Information Compact Disc . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

HP Support Assistant Compact Disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Customer care reseller sales and service support center . . . . . . . . . . . . . . . . . 46

Ordering related documentation and software . . . . . . . . . . . . . . . . . . . . . . . . . 47

Warranty statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Hewlett-Packard warranty statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Limited warranty for print cartridge life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Transfer unit and fuser warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

HP maintenance agreements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

On-site service agreements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

3 Installation and configuration

Unpack the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Unpacking the printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Installing the media tray. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Connecting power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Installing the print cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Installing a new overlay (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Testing the printer operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Using PowerSave. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Connecting to a computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Parallel connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Network connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Enhanced I/O (EIO) configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

HP Jetdirect print servers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Available enhanced I/O interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

NetWare networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Windows and Windows NT networks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

AppleTalk networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

LocalTalk configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

LocalTalk network configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

UNIX/Linux networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Printer drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Available drivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Additional drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Network configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Configuring the printer for the network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Configuring Novell NetWare frame type parameters . . . . . . . . . . . . . . . . . . . . . 68

Setting network security on the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Locking the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Using an ASCII PJL escape sequence to

set network security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

vi Contents C9660-90901

4 Printer maintenance

Cleaning the printer and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Cleaning spilled toner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Approximate replacement intervals for supply items. . . . . . . . . . . . . . . . . . . . . . . . . 73

ETB life under different circumstances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Locating supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Replacing supply items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Changing print cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Replacing the transfer unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Replacing the fuser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Printer memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Installing memory and font DIMMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Installing an HP Jetdirect print server card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

5 Theory of operation

Basic operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Operation sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Engine control system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

DC controller circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Motors and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Fuser power supply circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Heater temperature control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

High-voltage power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Low-voltage power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Formatter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

PowerSave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Printer memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

DIMM slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

PJL overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

PML. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Control panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Laser/scanner system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Scanner motor control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Image formation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Image formation process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Print cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Toner level detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Electrostatic transfer/transport belt (ETB) unit . . . . . . . . . . . . . . . . . . . . . . . . . 112

Electrostatic latent image formation block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Development block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Transfer block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Fusing block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Cleaning block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Calibration and cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Color plane registration calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Drum phase calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Image stabilization control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Pickup/feed system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Pickup/feed unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Fuser/delivery unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Duplex feed unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

500-sheet paper feeder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Pickup and feed operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

C9660-90901 Contents vii

6 Removal and replace ment

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Removal and replacement strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Repair notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Caution regarding electrostatic discharge (ESD). . . . . . . . . . . . . . . . . . . . . . . 139

Required tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Types of screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Print cartridges and ETB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Covers and external components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Rear cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Rear top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Left cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Right cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Multi-purpose tray (Tray 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Front cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Internal components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

DC controller shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Internal components (front) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Paper pickup unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Paper pickup sensor PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Cassette (Tray 2) paper pickup rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Paper pickup drive unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Multi-purpose tray pickup roller and separation pad . . . . . . . . . . . . . . . . . . . . 160

Solenoids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Color registration detection unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Internal components (left side). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Drum drive units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Memory tag antenna PCBs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Developing disengaging motor assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

DC controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Memory controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Cassette paper size detection switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Internal components (rear). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

Formatter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

Low-voltage power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Formatter case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Laser/scanner units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Internal components (right side). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

High-voltage power supply PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Toner level detection PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

High-voltage contact blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Door switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Internal components (top). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Fuser power supply PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Fuser drive unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

Fuser inlet paper sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Fuser delivery sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Output bin full sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

Cartridge fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Formatter fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

Optional 500-sheet paper feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

Paper feeder top cover plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

Paper feeder drive unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

Paper feeder pickup rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

Paper feeder PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202

viii Contents C9660-90901

7 Troubleshooting

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Troubleshooting process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Pre-troubleshooting checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Troubleshooting flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

Troubleshooting power-on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210

Printer error troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Status messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Warning messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Critical error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Alphabetical printer messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

Numerical printer messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

Paper path troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234

Jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234

Jam locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234

Jam locations by error message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Paper jam recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

Avoiding paper jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Persistent jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

Paper transport troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

Multiple pages are fed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

Paper is wrinkled or folded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

Paper is skewed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Image formation troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246

Print quality problems associated with media. . . . . . . . . . . . . . . . . . . . . . . . . . 246

Overhead transparency defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

Print quality problems associated with the environment. . . . . . . . . . . . . . . . . . 247

Print quality problems associated with jams. . . . . . . . . . . . . . . . . . . . . . . . . . . 247

Print quality troubleshooting pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

Understanding color variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248

Color selection process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248

Matching colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

Using color . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

Color options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

Adjusting color balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252

Image defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253

Repetitive defects troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260

Interface troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

Communications checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

EIO troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

AUTOEXEC.BAT standard configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264

Printer Job Language (PJL) commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264

Control panel troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

Printing a menu map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

Information menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268

Paper handling menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268

Configure device menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269

Diagnostics menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273

Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274

Tools for troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

Embedded Web server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

To access the embedded Web server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

Printer Status and Alerts software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

Printer configuration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279

Supplies status page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280

Usage page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281

Event log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282

C9660-90901 Contents ix

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

Diagnostics flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

Engine diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285

Individual diagnostic tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

Test pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292

Engine test page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292

Formatter test page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292

Engine resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293

Cold reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293

NVRAM initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293

Hard disk initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294

Calibration bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294

Calibrate Now . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294

Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295

Accessing the Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295

Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297

Main parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297

Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298

Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

Solenoids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301

Motors and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302

PCBs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

DC controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304

Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305

500-sheet paper feeder connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306

General circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

500-sheet paper feeder circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308

8 Parts and diagrams

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310

Ordering parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

Supplies and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

Common fasteners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

Illustrations and parts lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315

Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

Numerical parts list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348

x Contents C9660-90901

List of figures

Figure 1-1 HP Color LaserJet 4600 series printers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 1-2 Model and serial number information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Figure 1-3 Sample label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 1-4 Space requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Figure 1-5 Front view, HP Color LaserJet 4600 series (shown with additional 500-sheet paper feeder) . . . .26

Figure 1-6 Rear view, HP Color LaserJet 4600 series (shown with additional 500-sheet paper feeder) . . . .27

Figure 1-7 EMI statement for Korea . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 1-8 VCCI statement for Japan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 3-1 Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Figure 3-2 Optional package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Figure 3-3 Parallel port connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Figure 3-4 Direct to network connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Figure 3-5 Network print server connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Figure 3-6 Peer to peer connection (direct to network) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Figure 3-7 Peer to peer connection (parallel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Figure 4-1 ETB total page count according to average job length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Figure 4-2 Location of supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Figure 5-1 Basic system operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

Figure 5-2 Engine control system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Figure 5-3 DC controller circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

Figure 5-4 Motors and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Figure 5-5 Fuser power supply circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

Figure 5-6 Heater temperature control circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

Figure 5-7 High-voltage power supply circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

Figure 5-8 Low-voltage power supply circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Figure 5-9 Formatter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Figure 5-10 Laser/scanner system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Figure 5-11 Scanner motor control circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

Figure 5-12 Image formation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106

Figure 5-13 Image formation process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107

Figure 5-14 Print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108

Figure 5-15 Memory tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Figure 5-16 Toner level detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Figure 5-17 Developing cylinder disengaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111

Figure 5-18 ETB unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Figure 5-19 Primary exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113

Figure 5-20 Primary charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113

Figure 5-21 Laser beam exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Figure 5-22 Development block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115

Figure 5-23 Attaching the paper to the ETB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116

Figure 5-24 Toner transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117

Figure 5-25 Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117

Figure 5-26 Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118

Figure 5-27 ETB cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120

Figure 5-28 Drum cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121

Figure 5-29 Primary charging roller and toner charging roller cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Figure 5-30 Color registration calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122

Figure 5-31 Image density detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124

Figure 5-32 Pickup/feed system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126

C9660-90901 List of figures xi

Figure 5-33 Pickup/feed system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Figure 5-34 Cassette paper size detection switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Figure 5-35 Overhead transparency detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Figure 5-36 Small-size paper detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Figure 5-37 Duplex switch back . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Figure 5-38 Additional 500-sheet paper feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Figure 5-39 500-sheet paper feeder pickup and feed operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Figure 6-1 Phillips and Posidriv screwdriver comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Figure 6-2 Removing and replacing the rear cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Figure 6-3 Removing and replacing the top cover (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Figure 6-4 Removing and replacing the top cover (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Figure 6-5 Removing and replacing the rear top cover, removing screws (1 of 3) . . . . . . . . . . . . . . . . . . . . 146

Figure 6-6 Removing and replacing the rear top cover, releasing right-side tab (2 of 3) . . . . . . . . . . . . . . . 147

Figure 6-7 Removing and replacing the rear top cover, releasing left-side tab (3 of 3) . . . . . . . . . . . . . . . . 147

Figure 6-8 Removing and replacing the left cover (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Figure 6-9 Removing and replacing the left cover (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Figure 6-10 Removing and replacing the right cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Figure 6-11 Removing and replacing the multi-purpose tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Figure 6-12 Removing and replacing the multi-purpose tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Figure 6-13 Removing and replacing the control panel (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Figure 6-14 Removing and replacing the control panel (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Figure 6-15 Removing and replacing the control panel (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Figure 6-16 Installing a new control panel overlay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Figure 6-17 Removing and replacing the DC controller shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Figure 6-18 Removing and replacing the paper pickup unit (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Figure 6-19 Removing and replacing the paper pickup unit (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Figure 6-20 Removing and replacing the paper pickup sensor PCB (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . 157

Figure 6-21 Removing and replacing the paper pickup sensor PCB (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . 157

Figure 6-22 Removing the cassette pickup rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Figure 6-23 Replacing the cassette pickup rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Figure 6-24 Removing and replacing the paper pickup drive unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Figure 6-25 Removing and replacing the multi-purpose tray pickup roller and separation pad (1 of 2) . . . . . 160

Figure 6-26 Removing and replacing the multi-purpose tray pickup roller and separation pad (2 of 2) . . . . . 160

Figure 6-27 Removing and replacing the solenoids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Figure 6-28 Removing and replacing the color registration detection unit (1 of 2) . . . . . . . . . . . . . . . . . . . . . 163

Figure 6-29 Removing and replacing the color registration detection unit (2 of 2) . . . . . . . . . . . . . . . . . . . . . 163

Figure 6-30 Removing and replacing the developing disengaging rod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Figure 6-31 Reinstalling the developing disengaging rod (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Figure 6-32 Reinstalling the developing disengaging rod (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Figure 6-33 Removing and replacing the drum drive gears . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Figure 6-34 Removing and replacing the drum home position sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Figure 6-35 Removing and replacing the interlock cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Figure 6-36 Removing and replacing the interlock arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Figure 6-37 Removing and replacing the drum drive motors (cyan motor shown) . . . . . . . . . . . . . . . . . . . . . 169

Figure 6-38 Removing and replacing the memory tag antenna PCB (cyan is shown) . . . . . . . . . . . . . . . . . . 170

Figure 6-39 Removing and replacing the developing disengaging motor assembly . . . . . . . . . . . . . . . . . . . . 171

Figure 6-40 Removing and replacing the DC controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Figure 6-41 Removing and replacing the memory controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Figure 6-42 Removing and replacing the cassette paper size detection switch . . . . . . . . . . . . . . . . . . . . . . . 174

Figure 6-43 Removing and replacing the formatter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

Figure 6-44 Removing and replacing the low-voltage power supply, left side of printer (1 of 3) . . . . . . . . . . 176

Figure 6-45 Removing and replacing the low-voltage power supply, rear of printer (2 of 3) . . . . . . . . . . . . . 177

Figure 6-46 Removing and replacing the low-voltage power supply (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . 177

Figure 6-47 Removing and replacing the formatter case (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Figure 6-48 Removing and replacing the formatter case (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Figure 6-49 Disconnecting the laser/scanner connectors and formatter ribbon cable . . . . . . . . . . . . . . . . . . 180

Figure 6-50 Removing and replacing the laser/scanner cover plate (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . 181

Figure 6-51 Removing and replacing the laser/scanner cover plate (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . 181

Figure 6-52 Removing and replacing the left side laser/scanner retaining bar, left side of printer (1 of 2) . . . 182

xii List of figures C9660-90901

Figure 6-53 Removing and replacing the left side laser/scanner retaining bar, rear of printer (2 of 2) . . . . . .182

Figure 6-54 Removing and replacing the right side laser/scanner retaining bar, right side of printer (1 of 2) .183

Figure 6-55 Removing and replacing the right side laser/scanner retaining bar, rear of printer (2 of 2) . . . . .183

Figure 6-56 Removing and replacing the laser/scanner units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Figure 6-57 Removing and replacing the high-voltage power supply PCB . . . . . . . . . . . . . . . . . . . . . . . . . . .185

Figure 6-58 Aligning the high-voltage power supply PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .186

Figure 6-59 Removing and replacing the toner level detection PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .187

Figure 6-60 Removing and replacing the high-voltage contact blocks (cyan indicated) . . . . . . . . . . . . . . . . .188

Figure 6-61 Removing and replacing the door switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .189

Figure 6-62 Removing and replacing the fuser power supply PCB (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . .191

Figure 6-63 Removing and replacing the fuser power supply PCB (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . .191

Figure 6-64 Removing and replacing the fuser drive unit (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .193

Figure 6-65 Removing and replacing the fuser drive unit (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .193

Figure 6-66 Removing and replacing the fuser paper sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Figure 6-67 Removing and replacing the fuser delivery sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .195

Figure 6-68 Removing and replacing the output bin full sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .196

Figure 6-69 Removing and replacing the cartridge fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Figure 6-70 Removing and replacing the formatter fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .198

Figure 6-71 Removing and replacing the 500-sheet paper feeder top plate . . . . . . . . . . . . . . . . . . . . . . . . . .199

Figure 6-72 Removing and replacing the paper feeder drive unit, top view (1 of 2) . . . . . . . . . . . . . . . . . . . .200

Figure 6-73 Removing and replacing the paper feeder drive unit, side view (2 of 2) . . . . . . . . . . . . . . . . . . .200

Figure 6-74 Cam and gear alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .201

Figure 6-75 Removing and replacing the 500-sheet paper feeder PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . .202

Figure 7-1 Troubleshooting flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208

Figure 7-2 Jam locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234

Figure 7-3 Repetitive defects ruler (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .261

Figure 7-4 Repetitive defects ruler (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .262

Figure 7-5 HP Color LaserJet 4600 series printer configuration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .263

Figure 7-6 HP Color LaserJet 4600 series printer menu map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .267

Figure 7-7 Printer configuration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279

Figure 7-8 Supplies status page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .280

Figure 7-9 Usage page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .281

Figure 7-10 Event log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .282

Figure 7-11 Diagnostics flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

Figure 7-12 Formatter LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .284

Figure 7-13 Door switch and ETB connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .286

Figure 7-14 Tray 2 paper size switch arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .288

Figure 7-15 Test page switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .292

Figure 7-16 Location of main parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .297

Figure 7-17 Location of switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298

Figure 7-18 Door switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298

Figure 7-19 Location of sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .299

Figure 7-20 Sensors on the paper pickup unit (sensors are on the back of the PCB) . . . . . . . . . . . . . . . . . . . 299

Figure 7-21 Fuser sensors and output bin full sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300

Figure 7-22 Location of solenoids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301

Figure 7-23 Solenoids on the paper pickup unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301

Figure 7-24 Location of motors and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .302

Figure 7-25 PCB locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .303

Figure 7-26 Location of DC controller PCB components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .304

Figure 7-27 Location of connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305

Figure 7-28 500-sheet paper feeder connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .306

Figure 7-29 General circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .307

Figure 7-30 500-sheet paper feeder circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308

Figure 8-1 Assembly location diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315

Figure 8-2 PCB locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316

Figure 8-3 External covers and panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317

Figure 8-4 Internal components (1 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318

Figure 8-5 Internal components (2 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320

Figure 8-6 Internal components (3 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322

C9660-90901 List of figures xiii

Figure 8-7 Internal components (4 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324

Figure 8-8 Internal components (5 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326

Figure 8-9 Paper pickup drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328

Figure 8-10 Drum drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329

Figure 8-11 Disengaging drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

Figure 8-12 Fuser drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331

Figure 8-13 Cassette (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332

Figure 8-14 Cassette (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333

Figure 8-15 Paper pickup assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334

Figure 8-16 ETB assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335

Figure 8-17 Fuser assembly (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336

Figure 8-18 Fuser assembly (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

Figure 8-19 500-sheet paper feeder assembly location diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 8

Figure 8-20 500-sheet paper feeder internal components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339

Figure 8-21 500-sheet paper feeder drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340

Figure 8-22 500-sheet paper feeder cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341

xiv Li st of figure s C9660-90901

List of tables

Table 1-1 Printer features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 1-2 Model names and numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 1-3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 1-4 Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 1-5 Supply storage requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 1-6 Printer dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 1-7 Acoustic emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 1-8 Supported media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 1-9 Printing on transparencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 1-10 Weight equivalence table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 2-1 Related documentation and software . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Table 3-1 Printer drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Table 3-2 Printer security levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Table 4-1 Cleaning the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table 4-2 Approximate replacement intervals for supply items . . . . . . . . . . . . . . . . 73

Table 5-1 Basic operation sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Table 5-2 Function of motors and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Table 5-3 Fuser temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Table 5-4 Calibration timing and duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Table 5-5 Cleaning timing and duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Table 5-6 Cassette paper size detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Table 5-7 Feed speed according to media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Table 6-1 Types of screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Table 6-2 Approximate replacement intervals for supply items . . . . . . . . . . . . . . . 142

Table 7-1 Pre-troubleshooting checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Table 7-2 Alphabetical printer messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

Table 7-3 Numerical printer messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

Table 7-4 Error messages and associated jam locations . . . . . . . . . . . . . . . . . . . . 235

Table 7-5 Common causes of paper jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Table 7-6 Causes for jams in Tray 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240

Table 7-7 Causes for jams in Tray 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240

Table 7-8 Causes for jams in Tray 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241

Table 7-9 Causes for jams in the paper path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

Table 7-10 Causes for jams in the top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

Table 7-11 Causes for jams in the duplex path . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

Table 7-12 Causes for multiple pages feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

Table 7-13 Causes for wrinkled or folded paper (part one, paper path entrance) . . 244

Table 7-14 Causes for wrinkled or folded paper (part two, paper path exit) . . . . . . . 244

Table 7-15 Causes for skewed paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Table 7-16 Image defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253

Table 7-17 Causes for light images . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

Table 7-18 Causes for one color printing light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

Table 7-19 Causes for dark images . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

Table 7-20 Causes for one color printing dark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255

Table 7-21 Causes for a completely blank image . . . . . . . . . . . . . . . . . . . . . . . . . . 255

Table 7-22 Causes for an all black or solid colored image . . . . . . . . . . . . . . . . . . . . 255

Table 7-23 Causes for vertical lines of white dots . . . . . . . . . . . . . . . . . . . . . . . . . . 255

Table 7-24 Causes for dirt on the back of the paper . . . . . . . . . . . . . . . . . . . . . . . . 256

Table 7-25 Causes for dirt on the front of the paper . . . . . . . . . . . . . . . . . . . . . . . . . 256

C9660-90901 List of tables xv

Table 7-26 Causes for vertical lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256

Table 7-27 Causes for white vertical lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

Table 7-28 Causes for horizontal lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

Table 7-29 Causes for white horizontal lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

Table 7-30 Causes for a missing color . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

Table 7-31 Causes for blank spots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258

Table 7-32 Causes for poor fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258

Table 7-33 Causes for distortion or blurring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258

Table 7-34 Causes for smearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

Table 7-35 Causes for a misplaced image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

Table 7-36 Repetitive defect spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260

Table 7-37 Communications check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

Table 7-38 Information menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268

Table 7-39 Paper handling menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268

Table 7-40 Printing submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269

Table 7-41 Print quality submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270

Table 7-42 System setup submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

Table 7-43 I/O submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272

Table 7-44 Resets submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272

Table 7-45 Diagnostics menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273

Table 7-46 Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274

Table 7-47 Sensor test letter codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288

Table 7-48 Tray 2 paper size codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288

Table 7-49 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298

Table 7-50 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300

Table 7-51 Solenoids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301

Table 7-52 Motors and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302

Table 8-1 Supplies and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

Table 8-2 Common fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

Table 8-3 PCB locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

Table 8-4 External covers and panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317

Table 8-5 Internal components (1 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319

Table 8-6 Internal components (2 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321

Table 8-7 Internal components (3 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323

Table 8-8 Internal components (4 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

Table 8-9 Internal components (5 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327

Table 8-10 Paper pickup drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328

Table 8-11 Drum drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329

Table 8-12 Disengaging drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

Table 8-13 Fuser drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331

Table 8-14 Cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332

Table 8-15 Paper pickup assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334

Table 8-16 ETB assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335

Table 8-17 Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336

Table 8-18 500-sheet paper feeder assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . 338

Table 8-19 500-sheet paper feeder internal components . . . . . . . . . . . . . . . . . . . . 339

Table 8-20 500-sheet paper feeder drive assembly . . . . . . . . . . . . . . . . . . . . . . . . 340

Table 8-21 500-sheet paper feeder cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341

Table 8-22 Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

Table 8-23 Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348

xvi Li st of table s C9660-90901

1

Printer description

Chapter contents

Printer features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Model and serial numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Power and regulatory information. . . . . . . . . . . . . . . . . . . . . . . 22

Site requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Space requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Electrical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Supply storage requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Printer specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Printer assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Media requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Selecting print media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Supported media weights and sizes . . . . . . . . . . . . . . . . . . . . 29

Media to avoid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Media that may cause damage to the printer . . . . . . . . . . . . . . 31

Printing on special media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Weight equivalence table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Environmental Product Stewardship Program . . . . . . . . . . . . . . . . 36

Protecting the environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Regulatory statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

FCC Regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Laser safety statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Material Safety Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Toner safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Canadian DOC regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

EMI statement (Korea) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

VCCI statement (Japan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Laser statement of Finland. . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Declaration of Conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

C9660-90901 Chapter 1 Printer description 17

Printer features

The HP Color LaserJet 4600 series printer pictured in Figure 1-1 has five models.

● The HP Color LaserJet 4600 printer is the base model; it contains 96 MB of SDRAM.

● The HP Color LaserJet 4600n printer is the base model with an HP Jetdirect 610N print server

(this model is available only in Europe)

● The HP Color LaserJet 4600dn printer is the base model with an HP Jetdirect 610N print

server (network card) and automatic 2-sided printing.

● The HP Color LaserJet 4600dtn printer is the base model with an HP Jetdirect 610N print

server (network card), automatic 2-sided printing, additional 500-sheet paper feeder, and
160 MB of SDRAM.

● The HP Color LaserJet 4600hdn printer is the base model with an HP Jetdirect 610N print

server (network card), automatic 2-sided printing, additional 500-sheet paper feeder, a hard
disk, and 160 MB of SDRAM.

1

Figure 1-1 HP Color LaserJet 4600 series printers

1 HP Color LaserJet 4600, 4600n, and 4600dn printers
2 HP Color LaserJet 4600dtn and 4600hdn pri nter s

This printer series combines the quality and reliability of Hewlett-Packard printers with the features
listed in Table 1-1.

2

18 Printer features C9660-90901

Table 1-1 Printer features
Feature Description

Performance ● 17 pages per minute (ppm) on letter-sized paper, 16 ppm on

A4-sized paper.

● Prints on transparencies and glossy paper.

Memory

User interface

Supported
printer
personalities

Storage features

Environmental
features

● 96 megabytes (MB) of synchronous dynamic random access

memory (SDRAM) (160 MB i n the HP Color La serJet 4600 dtn
and 4600hdn printers).

● Can be expanded to 512 MB.

● Optional hard disk drive (included with the HP Color LaserJet

4600hdn printer).

● Graphic display on control panel.

● Enhanced Help with animated gr aph ic s .

● Embedded Web server to access support and order supplies

(network-connected printers).

● HP PCL 6.

● HP PCL 5c.

● PostScript 3 emulation.

● Automatic language switching.

● Job retention (for printer s with hard disks).

● Fonts and f o rms.

● Personal identification number (PIN) printing (for printers with

hard disks).

● PowerSave setting.

● High content of recyclable components and materials.

● Energy star compliant.

● Blue Angel compliant.

Fonts

● 80 internal fonts available for both PCL and PostScript

emulation.

● 80 printer-matching screen fonts in TrueType™ format

available with the software solution.

● Supports forms and f onts o n the d isk us ing H P Web Jetad min.

C9660-90901 Chapter 1 Printer description 19

Table 1-1 Printer features
Feature Description

Paper handli ng

Accessories

● Prints on media from 77 mm by 127 mm (3 inches by 5

inches) up to legal size.

● Prints on media with weights from 60 g/m

2

to 163 g/m2 (16 lb

bond to 43 lb bond).

● Prints on a wide range of media typ es includin g glossy, labels,

overhead transparencies, and envelopes.

● Multiple gloss levels.

● A 500-sheet input tray (Tray 2) that supports letter-, legal-,

executive-, JIS B5-, A4-, and A5-sized and custom media.

● Optional 500-sheet paper feeder (Tray 3) that supports letter-,

legal-, executive-, JIS B5-, A4-, and A5-sized and custom
media; standard on HP Color LaserJet 4600dtn and 4600hdn
printers.

● 2-sided printing on HPColor LaserJet 4600dn, 4600dtn, and

4600hdn printers.

● 250-sheet face-d o wn out put bin .

● Printer hard disk, which pro vides stor age f or f onts an d macros

as well as job storage; standard on HPColor
LaserJet 4600hdn.

● Dual inline memory modules (DIMM).

● Printer stand.

● Optional 500-sheet paper feeder (Tray 3) that supports letter-,

legal-, ex ecuti v e- , JIS B5-, A4- , and A5-siz ed med ia; sta ndard
on HP Color LaserJet 4600dtn and 4600hdn printers.

● Flash DIMM.

● Fast InfraRed (FIR) pod.

Connectivity

Supplies

● Optional enhanced input/output (EIO) network card; standard

on HP Color LaserJet 4600n, 4600dn, 4600dtn, and 4600hdn
printers.

● FIR connection.

● HP Web Jetadmin software.

● Standard bidirectional parallel cable interface (IEEE-1284

compliant).

● Supplies status pa ge contains information on toner le ve l, page

count, and estimated pages remaining.

● No-shake cartridge design.

● Printer checks for authentic HP print cartridges at cartridge

installation.

● Internet-enabled supply-ordering capabilities (using

embedded Web server or printer Status and Alerts).

20 Printer features C9660-90901

Identification

Model and serial numbers

The model number and serial numbers are listed on identification labels located on the rear of the
printer. The model number is alphanumeric, such as C9660A for the HP Color LaserJet 4600. The
serial number contains information about the country/region of origin, the printer version, production
code, and the production number of the printer (see Figure 1-2).

country/

region

of origin

Figure 1-2 Model and serial number information

printer version
production code

production number

Table 1-2 Model names and numbers

Model name Model number

HP Color LaserJet 4600 C9660A
HP Color LaserJet 4600n C9692A
HP Color LaserJet 4600dn C9661A
HP Color LaserJet 4600dtn C9662A
HP Color LaserJet 4600hdn C9663A

C9660-90901 Chapter 1 Printer description 21

Power and regulatory information

The identification labels on the rear of the printer also contain power rating and regulatory
information as shown in Figure 1-3.

CAUTION Converting the voltage on the printer can damage the printer . Do not use any voltage other than the

operating voltage. Any attempt to convert operating voltages will void the product warranty (for
example, attempting to change a 110V printer to a 220V printer).

Figure 1-3 Sample label

22 Identification C9660-90901

Site requirements

The printer must be kept in a proper location to maintain the performance level that has been set at
the factory. In particular, be sure that the environment adheres to the specifications listed in this
chapter.

Below are recommendations for the printer location and placement.
Make sure the printer has the following:

● a well-ventilated, dust-free area

● a hard, level surface (not more than a 2° angle):

• for the HP Color LaserJet 4600, 4600n, and 4600dn, the surface must support 37 kg (81 lb)

• for the HP Color LaserJet 4600dtn and 4600hdn, the surface must support 44 kg (97 lb)

● a level surface that supports all four corners of the 500-sheet paper feeder

● a constant temperature and humidity. (Do not install near water sources, humidifiers, air

conditioners, refrigerators, or other major appliances)
Make sure to keep the printer away from the following:

● direct sunlight, dust, open flames, or water

● the direct flow of exhaust from air ventilation systems

● magnets and devices that emit a magnetic field

● areas subject to vibration

● walls or other objects. There must be enough space around the printer for proper access and

ventilation. See Figure 1-4 on page 23.

Space requirements

The printer must have the following amounts of space above and around it.

1

Figure 1-4 Space requirements

1 530 mm (20.9 inches)

3

2

2 1294 mm (50 inches)
3 804 mm (31.7 inches)

C9660-90901 Chapter 1 Printer description 23

Electrical specifications

Table 1-3 lists the electrical specifications required to run the printer safely.

Table 1-3 Electrical specifications

Item 110-volt models 220-volt models

Power requirements 100-127 V (-10%, +6%)

50/60 Hz (+/- 2 Hz)

Power consumption
(LaserJet 4600)

During printing
During standby
During PowerSave
Off

Minimum recommended
circuit capacity for typical
product

* When the printer is in standby mode, it continues to consume a minimal amount of energy.

*

426 W
34 W
30 W
0 W

6 A 3 A

220-240 V (-10%, +6%)
50/60 Hz (+/- 2 Hz)

430 W
36 W
32 W
0 W

Note This information is preliminary and might not be current. Please see http://www.hp.com/support/

lj4600 for current information.

Environmental specifications

Keep the printer within the environmental conditions shown in Table 1-4 for optimum performance.

Table 1-4 Environmental specifications

Item Operating

Temperature

Recommended
Allowed

Humidity

Recommended
Allowed

Altitude

Allowed 0 to 2600 m

17° to 25° C (63° to 77° F)
10° to 30° C (50° to 86° F)

30% to 70% RH
10% to 80% RH

(0 to 8530 ft)

24 Site requirements C9660-90901

Supply storage requirements

The life of supplies is greatly affected by their storage environment. Use Table 1-5 to determine the
shelf life of stored supplies.

Table 1-5 Supply storage requirements

Item Storage time Storage condition

Temperature Normal (maximum of

Maximum temperature
change rate

Humidity Normal (maximum of

Atmospheric pressure 460 to 760 mm Hg (18.1 to 29.9 in Hg)
Storage time

1

The average storage time includes use time. Use cartridges within 2.5 years of the date code on the cartridge.

1

Printer specifications

Table 1-6 describes the dimensions of the printer.

Table 1-6 Printer dimensions

HP Color LaserJet
4600, 4600n, 4600dn

0° to 35° C (32° to 95° F)

2.5 years)
Severe (maximum of

18 days)
40° to 15° C (104° to 59° F) within 3 minutes

-20° to 25° C (-4° to 77° F) within 3 minutes

2.5 years)
Severe (maximum of

18 days)

2.5 years

High 35° to 40° C (95° to 104° F)
Low 0° to -20° C (32° to -4° F)

35% to 85% RH

High 85% to 95% RH
Low 10% to 35% RH

HP Color LaserJet
4600dtn, 4600hdn

Height 566 mm (22.3 inches) 654 mm (25.8 inches)
Width 456 mm (20 inches) 456 mm (20 inches)
Depth 480 mm (18.9 inches) 480 mm (18.9 inches)
Weight 37 kg (81 lb) 44 kg (97 lb)

Table 1-7 lists the acoustic emissions of the printer when it is printing and when it is in standby mode.

Table 1-7 Acoustic emissions

HP Color LaserJet 4600

Sound power

Printing
PowerSave

Bystander (1m)

Printing
PowerSave

Per ISO 9296

= 6.5 bels(A) [65 dB (A)]

L

WAd

L

= 5.0 bels(A) [50dB (A)]

WAd

Per ISO 9296

L

= 51 dB(A)

PAm

L

= 34 dB(A)

PAm

Note These values are subject to change. See http://www.hp.com/support/lj4600 for current information.

Maximum duty cycle is 85,000 pages per month.

C9660-90901 Chapter 1 Printer description 25

Printer assemblies

Figures 1-5 and 1-6 show the location of each major assembly in the printer. These assemblies are
described in Chapter 3.

1

2

3

4

5

6

Figure 1-5 Front view, HP Color LaserJet 4600 series (shown with additional 500-sheet paper feeder)

1 output bin
2 printer control panel
3 top cover
4 front cover (contains Tray 1)
5 Tray 2 (500-sheet standard tray)
6 Tray 3 (500-sheet paper feeder; optional on 4600, 4600n, and 4600dn models)
7 on/off switch

8

7

8 access to print cartridges, transfer unit, and fuser

26 Printer assemblies C9660-90901

1

4

5

2

6

3

7

8

Figure 1-6 Rear view, HP Color LaserJet 4600 series (shown with additional 500-sheet paper feeder)

1 output bin
2 on/off switch
3 Tray 3 (500-sheet paper feeder; optional on 4600, 4600n, and 4600dn models)
4 EIO connection (quantity 3)
5 memory access
6 FIR (Fast InfraRed) connection
7 parallel connection
8 power connection

C9660-90901 Chapter 1 Printer description 27

Media requirements

Selecting print media

You can use many types of paper and other print media with this printer. This section provides
guidelines and specifications for selecting and using different print media.

Before purchasing any media or specialized forms in quantity, verify that your paper supplier
obtains and understands the print media requirements specified in the HP LaserJet Family Print
Media Guide. The guide is available through Hewlett-Packard Customer Support (HPCS). See
page 47 for ordering information.

It is possible that media could meet all of the guidelines in this chapter and still not print
satisfactorily. This may be a result of abnormal characteristics of the printing environment or of
other variables over which Hewlett-Packard has no control (for example, extremes in temperature
and humidity).

Hewlett-Packard recommends testing any media before buying it in large quantities.

CAUTION Using media that does not conform to the specifications listed here and in the HP LaserJ et Family

Print Media Guide can cause problems that require service. This service is not covered by the

Hewlett-Packard warranty or service agreements.

Media specifications

For optimum results, use conventional 75 g/m2 (20 lb) xerographic paper. Verify that the paper is of
good quality and is free of cuts, nicks, tears, spots, loose particles, dust, wrinkles, curls, or bent
edges. Avoid fanning the print media before loading it into the paper trays.

28 Med ia requi r eme nts C9660-90901

Supported media weights and sizes

Table 1-8 shows the media types and sizes supported by the printer and the printer accessories.

Table 1-8 Supported media specifications

Tray Supported media Media

specifications

Tray 1 Paper

A4/Letter
Legal
Executive
JIS B5
A5

Custom
Minimum size:
76 by 127 mm (3 by 5 in)
Maximum size:
216 by 356 mm (8.5 by 14 in)

Transparencies

A4/Letter
Glossy film

A4/Letter

Legal

Executive

JIS B5

A5

Custom
Minimum size:
76 by 127 mm (3 by 5 in)
Maximum size:
216 by 356 mm (8.5 by 14 in)

Glossy Paper

A4/Letter

Legal

Executive

JIS B5

A5

Custom
Minimum size:
76 by 127 mm (3 by 5 in)
Maximum size:
216 by 356 mm (8.5 by 14 in)

60 to 163 g/m
(16 to 43 lb)

0.13 mm (5 mil) maximum stack height of

0.13 mm (5 mil) maximum stack height of

75 g/m
(20 lb to 32 lb)

2

2

to 120 g/m

Capacity

100 sheets of 75 g/m
(20 lb) paper

Do not load more th an the
maximum stack height of
10 mm (0.6 in)

10 mm (0.6 in)

10 mm (0.6 in)

2

maximum stack height of
10 mm (0.6 in)

2

Envelopes

Com10

Monarch

C5

DL

B5
Labels

(Tray 1 only)

A4/Letter

Legal

Executive

JIS B5

A5

Custom
Minimum size:
76 by 127 mm (3 by 5 in)
Maximum size:
216 by 356 mm (8.5 by 14 in)

C9660-90901 Chapter 1 Printer description 29

Maximum weight:

105 g/m
bond)

2

(28 lb

Limit of 20

Do not load more th an the
maximum stack height of
10 mm (0.6 in)

Table 1-8 Supported media specifications (continued)

Tray Supported media Media

specifications

Tray 2 and
optional
Tray 3* * **

Duplex
printing

Paper

A4/Letter
Legal
Executive
JIS B5
A5
Custom

Minimum size:
148 by 210 mm (5.8 by 8.2 in)
Maximum size:
216 by 356 mm (8.5 by 14 in)

Transparencies

A4/Letter

Glossy film

A4/Letter
Legal
Executive
JIS B5
A5
Custom

Minimum size:
148 by 210 mm (5.8 by 8.2 in)
Maximum size:
216 by 356 mm (8.5 by 14 in)

Glossy Paper

A4/Letter
Legal
Executive
JIS B5
A5
Custom

Minimum size:
148 by 210 mm (5.8 by 8.2 in)
Maximum size:
216 by 356 mm (8.5 by 14 in)

Paper, Glossy Paper

A4/Letter
Legal
Executive
JIS B5

60 to 105 g/m
(16 to 28 lb)

0.13 mm (5 mil) Limit of 100 sheets

0.13 mm (5 mil) Limit of 100 sheets

75 g/m
(20 lb to 32 lb)

75 g/m
(20 lb to 28 lb)

2

2

to 120 g/m

2

to 105 g/m

Capacity

500 sheets of 75 g/m
(20 lb) paper

maximum stack height of
50 mm (2 inches)

2

Limit of 200 sheets

2

2

Custom paper sizes are not
supported for 2-sided printing.

*Trays 2 and 3 do not support the range of custom sizes available in Tray 1.
**Trays 2 and 3 use custom size, specifically for B5 ISO.

Note Use only HP-supported transparencies (HP part number C2934A, Letter size; C2936A, A4 size).

30 Med ia requi r eme nts C9660-90901

Media to avoid

This printer can handle many types of media. Using media outside the printer’s specifications will
cause a loss of print quality and increase the chance of paper jams occurring.

● Do not use paper that is too rough.

● Do not use paper with cutouts or perforations other than standard 3-hole punched paper.

● Do not use multipart forms.

● Do not use paper that has already been printed on or fed through a photocopier or printer.

● Do not use paper with a watermark if you are printing solid patterns.

Media that may cause damage to the printer

In rare circumstances media can damage the printer. To prevent possible damage, do not use the
following media:

● Do not use paper that is embossed or coated unless it is specifically recommended for use in this

printer.

● Do not use paper with irregularities such as tabs or staples.

● Do not use letterhead paper with low temperature dyes or thermography. Preprinted forms or

letterhead must use inks that can tolerate temperatures of 190° C (374° F) for 0.1 second.

● Do not use any media that produces hazardous emissions, or that melts, offsets, or discolors

when exposed to 190° C (374° F) for 0.1 second.

● Do not use transparencies designed for use with Inkjet printers or other low temperature printers.

Use only transparencies that are specified for use with HP Color LaserJet printers.

Printing on special media

Use these guidelines when printing on special types of media.

● For optimum results, use conventional 75 g/m

● Verify that the paper is of good quality and free of cuts, nicks, tears, spots, loose particles, dust,

wrinkles, curls, or bent edges.

Transparencies

When printing on transparencies, use the following guidelines.

● Handle transparencies using the edges. Oils from your fingers can remain on the transparency

and can cause print quality problems.

● Use only overhead transparencies recommended for use in this printer. Hewlett-Packard

recommends using HP Color LaserJet Transparencies with this printer. HP products are
designed to work together for optimum printing results. Table 1-9 describes the recommended
specifications for transparencies.

CAUTION T ransparencies not designed for LaserJet printing will melt in the printer, causing damage to the printer .

2

(20 lb) xerographic paper.

C9660-90901 Chapter 1 Printer description 31

Table 1-9 Printing on transparencies

Description Specifications

Electrical surface
resistivity

Fusing compatibility Materials must not discolor, melt, offset, or release

Caliper (thickness ) 0.12 mm (0.0048 in) to 0.13 mm (0.0052 in)

2.0 to 15 by 10 ohms per square inch

hazardous emissions when heated to 190°C
(374° F) for 0.1 second.

Glossy paper

● In either the software application or the driver, select Glossy as the media type for media

lighter than 105 g/m
(28 lb bond), or print from a tray that is configured for glossy paper.

● You can also use the printer control panel to set the media type to GLOSS for the input tray you

are using.

● Because this setting affects all print jobs, it is important to return the printer to its original

settings once your job has printed. See the section in the online user guide on configuring input
trays.

Note Hewlett-Packard recommends using HP Color LaserJet Soft Gloss paper with this printer. HP

products are designed to work together for optimum printing results. If HP Color LaserJet Soft Gloss
paper is not used with this printer, print quality may be compromised.

2

(28 lb bond), select Heavy Glossy for media heavier than 105 g/m2

Colored paper

● Colored paper should be of the same high quality as white xerographic paper.

● Pigments used must be able to withstand the printer’s fusing temperature of 190° C (374° F) for

0.1 second without deterioration.

● Do not use paper with a colored coating that was added after the paper was produced.

● The printer creates colors by printing patterns of dots, overlaying and varying their spacing to

produce various colors. Varying the shade or color of your paper will affect the shades of your
printed colors.

Heavy paper

● Use Tray 1 for paper that is heavier than 105 g/m

● For optimum results when printing on heavy paper, use the printer control panel to set the

media type for the tray to

● In either the software application or the driver, select Heavy as the media type, or print from a

HEAVY.

tray that is configured for heavy paper.

● Because this setting affects all print jobs, it is important to return the printer to its original

settings once your job has printed. See the section in the online user guide on configuring input
trays.

CAUTION In general, do not use paper that is heavier than the recommended specification for this printer. Doing

so can cause misfeeds, jams, inferior print quality , and excessive mechanical wear. Howe v er , some
heavier media types, such as HP Cover Stock, can be safely used. See T able 1-8 for supported paper
types and sizes.

32 Med ia requi r eme nts C9660-90901

2

(28 lb bond up to 43 lb bond).

Envelopes

Envelopes can be printed only from Tray 1. Set the tray’s media size to the specific envelope size. For
information about loading envelopes, see the section in the online user guide about loading
envelopes into Tray 1.

Adhering to the following guidelines will help ensure proper printing on envelopes and help prevent
printer jams:

● Do not load more than 20 envelopes into Tray 1.

● The weight rating of envelopes should not exceed 105 g/m

● Envelopes should be flat.

● Do not use e nvelo pes with windows or clasps.

● Envelopes must not be wrinkled, nicked, or otherwise damaged.

● Envelopes with peel-off adhesive strips must use adhesives that can withstand the heat and

2

(28 lb).

pressures of the printer’s fusing process.

● Envelopes should be loaded face-down and with the postage end feeding into the printer first.

CAUTION T o prevent sev ere printer damage, do not use envelopes that have windows, clasps, snaps, or synthetic

materials.

Labels

Note To print labels, set the tray’s media type to LABELS in the printer control panel.

When printing labels, use the following guidelines:

● Verify that the label’s adhesive material can tolerate temperatures of 190° C (374° F) for 0.1

second.

● V erify that adhesive material is not exposed between the labels. Exposed areas can cause labels

to peel off during printing, which can cause printer jams. Exposed adhesive can also cause
damage to printer components.

● Do not re-feed a sheet of labels.

● Verify that labels lie flat.

● Do not use labels that are wrinkled, bubbled, or otherwise damaged.

Preprinted forms and letterhead

Observe the following guidelines for best results with preprinted forms and letterhead:

● Forms and letterhead must be printed with heat-resistant inks that will not melt, vaporize, or

release hazardous emissions when subjected to the printer’s fusing temperature of
approximately 190° C (374° F) for 0.1 second.

● Inks must be non-flammable and should not adversely affect any printer rollers.

● Forms and letterhead should be sealed in a moisture-proof wrapping to prevent changes during

storage.

● Before you load preprinted paper such as forms and letterhead, verify that the ink on the paper is

dry. During the fusing process, wet ink can come off of preprinted paper.

● When duplex printing, load preprinted forms and letterhead into Tra y 2 and Tray 3 with the front of

the page facing down and the top edge of the page towards the back of the printer. Load
preprinted forms and letterhead into Tray 1 with the front of the page facing up and the bottom
edge feeding into the printer first.

C9660-90901 Chapter 1 Printer description 33

Recycled paper

This printer supports the use of recycled paper. Recycled paper must meet the same specifications
as standard paper; refer to the HP LaserJet Family Print Media Guide, av ailable through HP Direct.
See the online user guide for ordering information. Hewlett-Packard recommends that recycled
paper contain no more than 5 percent groundwood.

34 Med ia requi r eme nts C9660-90901

Weight equivalence table

Table 1-10 shows equivalent weights for different grades of paper. A boldface type value indicates a
commonly available standard weight for that grade.

Note Text and book grades marked with an asterisk (*) actually calculate to 51, 61, 71, and 81 but are

rounded to standard book or text weights of 50, 60, 70, and 80.

Table 1-10 Weight equivalence table

Bond
weight
(17 by 22
inches)

Text/
Book
weight
(25 by 38
inches)

16# 41# 22# 27# 33# 37# 60 g/m
17# 43# 24# 29# 35# 39# 64 g/m
20# 50# * 28# 34# 42# 46# 75 g/m
21# 54# 30# 36# 44# 49# 80 g/m
24# 60# * 33# 41# 50# 55# 90 g/m
27# 68# 37# 45# 55# 61# 100 g/m
28# 70# * 39# 49# 58# 65# 105 g/m
29# 74# 41# 50# 61# 68# 110 g/m
32# 80# * 44# 55# 67# 74# 120 g/m
36# 90# 50# 62# 75# 83# 135 g/m

39# 100# 55# 67# 82# 91# 148 g/m
40# 101# 55# 68# 83# 92# 150 g/m
43# 110# 60# 74# 90# 100# 163 g/m
45# 115# 63# 77# 94# 104# 170 g/m
47# 119# 65# 80# 97# 108# 176 g/m
51# 128# 70# 86# 105# 117# 190 g/m
53# 134# 74# 90# 110# 122# 199 g/m
54# 137# 75# 93# 113# 125# 203 g/m
58# 146# 80# 98# 120# 133# 216 g/m
65# 165# 90# 111# 135# 150# 244 g/m
66# 169# 92# 114# 138# 154# 250 g/m
67# 171# 94# 115# 140# 155# 253 g/m
70# 178# 98# 120# 146# 162# 264 g/m
72# 183# 100# 123# 150# 166# 271 g/m

Cover
weight
(20 by
26
inches)

Bristol
weight
(22.5 by

28.5
inches)

Index
weight
(25.5 by

30.5
inches)

Tag
weight
(24 by 36
inches)

Metric
weight

2
2
2
2
2

2

2

2
2
2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

C9660-90901 Chapter 1 Printer description 35

Environmental Product Stewardship Program

Protecting the environment

Hewlett-Packard Company is committed to providing quality products in an environmentally sound
manner. This product has been designed with several attributes to minimize impacts on the
environment.

Ozone production

This product generates no appreciable ozone gas (O3).

Energy consumption

Energy usage drops significantly while in PowerSave mode, which saves natural resources and
saves money without affecting the high performance of this printer. This product qualifies for
ENERGY STAR
office products.

®

, which is a voluntary program to encourage the development of energy-efficient

ENERGY STAR
Protection Agency. As an ENERGY STAR
Company has determined that this product meets ENERGY STAR
Guidelines for energy efficiency. For more information, see http://

www.energ ystar.gov/.

®

is a U.S. registered service mark of the U.S. Environmental

®

partner, Hewlett-Packard

®

Paper use

This product’s optional automatic duplex f eature (2-sided printing) can reduce paper usage and the
resulting demands on natural resources.

Plastics

Plastic parts over 25 grams have markings according to international standards that enhance the
ability to identify plastics for recycling purposes at the end of the product’s lif e.

HP LaserJet Printing Supplies

In many countries/regions, this product’s printing supplies (print cartridges, fuser , and transfer unit)
can be returned to HP through the HP Printing Supplies Returns and Recycling Program. An easy
to use and free takeback program is available in over 48 countries/regions. Multi-lingual program
information and instructions are included in every new HP LaserJet print cartridge and supplies
package.

36 Environmental Product Stewardship Program C9660-90901

HP Printing Supplies Returns and Recycling Program information

Since 1990, the HP Printing Supplies Returns and Recycling Program has collected more than 47
million used LaserJet printer cartridges that otherwise might have been discarded in the world’s
landfills. The HP LaserJet printer cartridges and supplies are collected and bulk-shipped to our
resource and recov ery partners, who disassemble the cartridges. After a thorough quality inspection,
selected parts are reclaimed for use in new cartridges. Remaining materials are separated and
converted into raw materials f or use by other industries to make a variety of useful products.

● U.S. returns—For a more environmentally responsible return of used cartridges and supplies,

HP encourages the use of bulk returns. Simply bundle two or more cartridges together and use
the single, pre-paid, and pre-addressed UPS label that is supplied in the package. For more
information in the U.S., call 1-800-340-2445 or visit the HP LaserJet Supplies website at http://

www.hp.com/go/recycle.

● Non-U.S. recycling returns—Non-U.S. customers should call the local HP Sales and Service

Office or visit the http://www.hp.com/go/recycle

website for further information regarding

availability of the HP Supplies Returns and Recycling Program.

Recycled paper

This product is capable of using recycled papers when the paper meets the guidelines outlined in the
Print Media Guide. This product is suitable for the use of recycled paper according to DIN 19309.

Material restrictions

This product does not contain batteries.
This product does not contain added mercury.
This product contains lead in solder.
For recycling information, contact http://www.hp.com/go/recycle

to the Elec tronics Industries Alliance website http://www.eiae.org

, contact your local authorities, or go

.

Extended warranty

HP SupportPack provides coverage for the HP hardware product and all HP-supplied internal
components. The hardware maintenance covers a 1 to 5 year period from date of the HP product
purchase. The customer must purchase HP SupportPack within 90 days of the HP product purchase.
For more information, contact the HP Customer Care Service and Support group.

Spare parts and supplies availability

Spare parts and supplies for this product will be available for at least five years after production has

stopped.

For more information

On HP’s environmental programs, including:

● Product environmental profile sheet for this and many related HP products

● HP’s commitment to the environment

● HP’s environmental management system

● HP’s end-of-life product return and recycling program

● Material Safety Data Sheets

See http://www.hp.com/go/environment

http://www.hp.com/hpinfo/community/environment/

C9660-90901 Chapter 1 Printer description 37

or

.

Regulatory statements

FCC Regulations

This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC rules.These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses, and can
radiate radio frequency energy. If this equipment is not installed and used in accordance with the
instructions, it may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:

● Reorient or relocate the receiving antenna.

● Increase separation between equipment and receiver.

● Connect equipment to an outlet on a circuit different from that to which the receiver is located.

● Consult your dealer or an experienced radio/TV technician.

Note Any changes or modifications to the printer that are not expressly approved by HP could void the

user’s authority to operate this equipment.
Use of a shielded interface cable is required to comply with the Class B limits of Part 15 of FCC rules.

38 Regu la tor y sta tem ents C9660-90901

Safety information

Laser safety statement

The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration
has implemented regulations for laser products manufactured since 1 August 1976. Compliance is
mandatory for products marketed in the United States. The printer is certified as a “Class 1” laser
product under the U.S. Department of Health and Human Services (DHHS) Radiation Performance
Standard according to the Radiation Control for Health and Safety Act of 1968. Since radiation
emitted inside the printer is completely confined within protective housings and external covers, the
laser beam cannot escape during any phase of normal user operation.

WARNING! Using controls, making adjustments, or performing procedures other than those specified in this guide

may result in exposure to hazardous radiation.

Material Safety Data Sheet

Material Safety Data Sheets (MSDS) can be obtained by contacting the HP LaserJet Supplies
website at http://www.hp.com/go/msds

Toner safety

.

Hewlett-Packard encourages responsible disposal of HP LaserJet printer supply items through its
Environmental Collection Program. For details on this program, see the recycling instruction guide
enclosed with each supply item.

Note In case of toner spills, skin and clothing are best cleaned by removing as much toner as possible with

a dry tissue, then washing with cold water. Hot water causes toner to permanently set into clothing.

Canadian DOC regulations

Complies with Canadian EMC Class B requirements.
«Conforme á la classe B des normes canadiennes de compatibilité électromagnétiques. «CEM».»»

EMI statement (Korea)

Figure 1-7 EMI statement for Korea

C9660-90901 Chapter 1 Printer description 39

VCCI statement (Japan)

Figure 1-8 VCCI statement for Japan

40 Safety information C9660-90901

Laser statement for Finland

LASERTURVALLISUUS

Luokan 1 laserlaite

Klass 1 Laser Apparat

HP Color LaserJet 4600, 4600n, 4600dn, 4600dtn, 4600hdn laserkirjoitin on käyttäjän kannalta
turvallinen luokan 1 laserlaite. Normaalissa käytössä kirjoittimen suojakotelointi estää lasers äteen
pääsyn laitteen ulkopuolelle.

Laitteen turvallisuusluokka on määritetty standardin EN 60825-1 (1994) mukaisesti.

VAROITUS !

Laitteen käyttäminen muulla kuin käyttöohjeessa mainitulla tavalla saattaa altistaa käyttäjän
turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle.

VARNING !

Om apparaten används på annat sätt än i bruksanvisning specificerats, kan användaren utsättas för
osynlig laserstrålning, som överskrider gränsen för laserklass 1.

HUOLTO

HP Color LaserJet 4600, 4600n, 4600dn, 4600dtn, 4600hdn kirjoittimen sisällä ei ole käyttäjän
huollettavissa olevia kohteita. Laitteen saa avata ja huoltaa ainoastaan sen huoltamiseen koulutettu
henkilö. Tällaiseksi huoltotoimenpiteeksi ei katsota väriainekasetin vaihtamista, paperiradan
puhdistusta tai muita käyttäjän käsikirjassa lueteltuja, käyttäjän teht äväksi tarkoitettuja ylläpitotoimia,
jotka voidaan suorittaa ilman erikoistyökaluja.

VARO !

Mikäli kirjoittimen suojakotelo avataan, olet alttiina näkymättömälle lasersäteilylle laitteen ollessa
toiminnassa. Älä katso säteeseen.

VARNING !

Om laserprinterns skyddshölje öppnas då apparaten är i funktion, utsättas användaren för osynlig
laserstrålning. Betrakta ej strålen.

Tiedot laitteessa käytettävän laserdiodin säteilyominaisuuksista:

Aallonpituus 775-7 95 nm
Teho 5 mW
Luokan 3B laser

C9660-90901 Chapter 1 Printer description 41

Declaration of Conformity

according to ISO/IEC Guide 22 and EN 45014

Manufacturer’s Name:
Manufacturer’s Address:

Hewlett-Packard Company
11311 Chinden Boulevard
Boise, Idaho 83714-1021 USA

declares that the product

Product Name:

HP Color LaserJet 4600/4600n/4600dn/4600dtn/4600hdn
Printer

Model Number

4

:

Including 500-sheet paper feeder
C9660A /C9692A /C9661A /C9662A /C9663A Printer
C9664A 500-sheet paper feeder

Product Options:

ALL

conforms to the following Product Specifications:

Safety: IEC 950:1991+A1+A2+A3+A4 / EN 60950:1992+A1+A2+A3+A4+A11

IEC 825-1:1993 +A1 / EN 60825-1:1994 +A11 Class 1 Laser/LED Product

EMC: CISPR 22:1997 / EN 55022:1998 Class B

EN 61000-3-2:1995
EN 61000-3-3:1995
EN 55024: 1998
FCC Title 47 CFR, Part 15 Class B
/ ICES-002, Issue 2
AS / NZS 3548:1995

1

2

Supplementary Information:

The product herewith complies with the requirements of the EMC Directive 89/336/EEC and the Low Voltage
Directive 73/23/EEC, and carries the CE-Marking accordingly:

1

The product was tested in a typical configuration with Hewlett-Packard Personal Computer Systems.

2

This Device complies with Part 15 of the FCC Rules. Operation is subject to the following two Conditions:
(1) this device may not cause harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.

3

Product exhibits Class A operation when connected to Local Area Network (LAN) cables using print server
accessories.
4

The model number may include an additional suffix letter "R".

Hewlett-Packard Company

Boise, Idaho USA

April 1, 2002

For regulatory topics only:

Australia Contact: Product Regulations Manager, Hewlett-Packard Australia Ltd., 31-41 Joseph Street,
Blackburn, Victoria 3130, Australia

European Contact: Your Local Hewlett-Packard Sales and Service Office or Hewlett-Packard Gmbh,
Department HQ-TRE / Standards Europe, Herrenberger Straße110-140, D-71034 Böblingen
(FAX: [phone])

USA Contact: Product Regulations Manager, Hewlett-Packard Company, PO Box 15, Mail Stop 160,
Boise, ID 83707-0015 (Phone: [phone])

42 Safety information C9660-90901

2

Service approach

Chapter contents

Service approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Parts and supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Ordering parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Ordering supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Exchange program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

World Wide Web. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

HP Service Parts Information Compact Disc . . . . . . . . . . . . . . 46

HP Support Assistant Compact Disc . . . . . . . . . . . . . . . . . . . . 46

Customer care reseller sales and service support center. . . . . 46

Ordering related documentation and software . . . . . . . . . . . . . 47

Warranty statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Hewlett-Packard warranty statement . . . . . . . . . . . . . . . . . . . . 48

Limited warranty for print cartridge life . . . . . . . . . . . . . . . . . . . . . . 49

Transfer unit and fuser warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

HP maintenance agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

On-site service agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

C9660-90901 Chapter 2 Service approach 43

Service approach

Printer repair normally begins by using the printer’s internal diagnostics and the three-step process
below.

Step 1 Isolate the problem to the major system (for example, the host computer, the network

Step 2 Determine if the problem is located in the accessories or in the printer engine.
Step 3 Troubleshoot the problem using the procedures in Chapter 7.

Once a faulty part is located, the printer can usually be repaired at the assembly level by replacing
field replaceable units (FRUs). Some mechanical assemblies might need to be repaired at the
subassembly level. Hewlett-Packard does not support replacement of components on the printer
circuit assembles.

or server, or the printer system).

44 Se rv ice appr o a ch C9660-90901

Parts and supplies

Order ing parts

Field replaceable and accessory part numbers are found in Chapter 8 of this manual. Order
replacement parts from Hewlett-Packard Customer Support-Americas (HPCS-A) or Hewlett-Packard
Customer Support-Europe (HPCS-E).

Note Use only accessories specifically designed for this printer. Accessories can be ordered from an

authorized service or support provider. See “Ordering related documentation and software” on page 47
and “Ordering parts” on page 311 for additional ordering information.

By phone:

● Hewlett-Packard Customer Support-Americas (HPCS-A)

(1)[phone] (U.S. only)

● Hewlett-Packard Customer Support-Europe (HPCS-E)

(49 7031) 14 2253

By mail:

Hewlett-Packard Company

HPCS-A

8050 Foothills Blvd.
Roseville, CA 95678

Hewlett-Packard Company

HPCS-E

Wolf-Hirth S traße 33
D-7030 Böblingen, Germany

Order ing supplies

Order supplies directly from Hewlett-Packard. The phone numbers for ordering supplies are:

● U.S. [phone]

● Canada [phone]; Toronto [phone]

● United Kingdom 0734-441212

● Other local phone numbers may also be available

C9660-90901 Chapter 2 Service approach 45

Exchange program

HP offers remanufactured assemblies for some parts. These are identified in Chapter 8 and can be
ordered from Hewlett-Packard Customer Support-Americas (HPCS-A) or Hewlett-Packard
Customer Support-Europe (HPCS-E).

Supplies

Paper and print cartridges can be ordered directly from Hewlett-Packard. See Chapter 8 for
ordering information.

World Wide Web

Printer drivers, updated HP printer software, and product and support information can be obtained
from the following URL:

In the U.S.: http://www.hp.com/support/lj4600
Printer drivers may be obtained from the following sites:
In China: ftp://www.hp.com.cn/support/lj4600

In Japan: ftp://www.jpn.hp.com/support/lj4600
In Korea: http://www.hp.co.kr/support/lj4600
In Taiwan: http://www.hp.com.tw/support/lj4600

or the local driver website: http://www.dds.com.tw

HP Service Parts Information Compact Disc

This powerful, CD-ROM-based parts information tool is designed to give users fast, easy access to
parts information such as pricing and recommended stocking lists for a wide range of HP products.
To subscribe to this quarterly service in the U.S. or Canada, call [phone]. In Asia Pacific,
call (65) 740-4484. Parts identification and pricing information can also be checked via the World
Wide Web at http://www.hp.com/go/partsinfo

.

HP Support Assistant Compact Disc

This support tool offers a comprehensive online information system designed to provide technical
and product information about HP products. To subscribe to the quarterly service in the U.S. or
Canada, call [phone]. In Hong Kong, Indonesia, Malaysia, or Singapore, call Mentor Media
at (65) 740-4477.

Customer care reseller sales and service support center

The Customer Care Reseller Sales and Support Center is available to assist resellers and service
technicians. To reach this support center, call (1) [phone].

HP authorized resellers and support

To locate authorized HP resellers and support, call (1) [phone] in the U.S.
or (1) [phone] in Canada.

HP service agreements

Call (1) [phone] in the U.S. or (1) [phone] in Canada.

Other areas

Outside of North America and Europe, contact the local HP sales office for assistance in obtaining
technical support for resellers and servic e techn ic ia ns.

46 Parts and supplies C9660-90901

Ordering related documentation and software

Table 2-1 shows where to order related documentation and software. Telephone numbers for the
various sources are:

● Hewlett-Packard Customer Support-Americas (HPCS-A)

(1)[phone] (U.S. only)

● Hewlett-Packard Customer Support-Europe (HPCS-E)

(49 7031) 14 2253

● HP Distribution Center (HPD) [phone].

Fax: [phone]

Table 2-1 Related documentation and software

Description Part Number

HP LaserJet Family Print Media Guide 5963-7863
HP JetDirect Print Server Administrator’s Guide 5971-3257
PCL/PJL Technical Reference Package 5021-0330
HP Color LaserJet 4600 Series Getting Started Guide C9660-90902
HP Color LaserJet 4600 Series Service Manual C9660-90901

HP Color LaserJet 4600 Series Printer Service and Support CD-ROM C9660-60107
HP Color LaserJet 4600 Series Printer Self-paced Training Kit C9660-67905

C9660-90901 Chapter 2 Service approach 47

Warranty statement

Hewlett-Packard warranty sta tement

HP Color LaserJet 4600, 4600n, 4600dn,
4600dtn, and 4600hdn printer

1 HP warrants HP hardware, accessories and supplies against defects in materials and

workmanship for the period specified above. If HP receives notice of such defects during the
warranty period, HP will, at its option, either repair or replace products which prove to be
defective. Replacement products may be either new or like-new.

2 HP warrants that HP software will not fail to execute its programming instructions, for the period

specified above, due to defects in material and workmanship when properly installed and used.
If HP receives notice of such defects during the warranty period, HP will replace software
media which does not execute its programming instructions due to such defects.

3 HP does not warrant that the operation of HP products will be uninterrupted or error free. If HP

is unable, within a reasonable time, to repair or replace any product to a condition as
warranted, customer will be entitled to a refund of the purchase price upon prompt return of the
product.

4 HP products may contain remanufactured parts equivalent to new in performance or may hav e

been subject to incidental use.

5 The warranty period begins on the date of delivery or on the date of installation if installed by

HP. If customer schedules or delays HP installation more than 30 days after delivery, warranty
begins on the 31st day from delivery.

6 Warranty does not apply to defects resulting from (a) improper or inadequate maintenance or

calibration, (b) software, interfacing, parts or supplies not supplied by HP, (c) unauthorized
modification or misuse, (d) operation outside of the published environmental specifications for
the product, or (e) improper site preparation or maintenance.

1 year limited warranty

7 TO THE EX TENT ALLO WED BY LOCA L LA W, THE ABOVE W ARRA NTIES ARE EXCLUSIV E

AND NO OTHER WARRANTY OR CONDITION, WHETHER WRITTEN OR ORAL, IS
EXPRESSED OR IMPLIED AND HP SPECIFICALLY DISCLAIMS THE IMPLIED
WARRANTIES OR CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, AND
FITNESS FOR A PARTICULAR PURPOSE.

8 HP will be liable for damage to tangible property per incident up to the greater of $300,000 or

the actual amount paid for the product that is the subject of the claim, and for damages for
bodily injury or death, to the extent that all such damages are determined by a court of
competent jurisdiction to have been directly caused by a defective HP product.

9 TO THE EXTENT ALLOWED BY LOCAL LA W, THE REMEDIES IN THIS WARRANTY

STATEMENT ARE CUSTOMER’S SOLE AND EXCLUSIVE REMEDIES. EXCEPT AS
INDICATED ABO VE, IN NO EV ENT WILL HP OR ITS SUPPL IERS BE L IABLE FOR LOSS OF
DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST
PROFIT OR DATA), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR
OTHERWISE.

10 FOR CONSUMER TRANSACTIONS IN A USTRALIA AND NEW ZEALAND: THE W ARRANTY

TERMS CONTAINED IN THIS STATEMENT, EXCEPT TO THE EXTENT LAWFULLY
PERMITTED, DO NOT EXCLUDE, RESTRICT OR MODIFY AND ARE IN ADDITION TO THE
MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO
YOU.

48 Warranty statement C9660-90901

Limited warranty for print cartridge life

This HP product is warranted to be free from defects in materials and workmanship during its useful
life (end of life is indicated by a printer control panel low-life message).

This warranty does not cover products that have been modified, refurbished, remanufactured,
misused, or tampered with in any way.

This limited warranty gives you specific legal rights. You may have other rights which vary from state
to state, province to province, and country/region to country/region.

THE ABOVE WARRANTIES ARE EXCLUSIVE AND NO OTHER WARRANTY, WHETHER
WRITTEN OR ORAL, IS EXPRESSED OR IMPLIED. THE HEWLETT-PACKARD COMPANY
SPECIFICALL Y DISCLAIMS THE IMPLIED WARRANTIES OR MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. TO THE EXTENT ALLOWED BY APPLICABLE LAW, IN NO
EVENT SHALL HEWLETT-PACKARD COMPANY BE LIABLE FOR ANY INCIDENTAL,
CONSEQUENTIAL, SPECIAL, INDI RECT, PUNITIVE, OR EXEMPLARY DAMAGES OR LOST
PROFITS FROM ANY BREACH OF THIS WARRANTY OR OTHERWISE.

In the event that your product proves to be defective, please return to place of purchase with a written
description of the problem.

Transfer unit and fuser warranty

This HP product is warranted to be free from defects in materials and workmanship for one year or
until the printer control panel indicates a low-life message, whichever occurs first.

This warranty does not cover products that have been modified, refurbished, remanufactured,
misused, or tampered with in any way.

This limited warranty gives you specific legal rights. You may have other rights which vary from state
to state, province to province, and country/region to country/region.

THE ABOVE WARRANTIES ARE EXCLUSIVE AND NO OTHER WARRANTY, WHETHER
WRITTEN OR ORAL, IS EXPRESSED OR IMPLIED. THE HEWLETT-PACKARD COMPANY
SPECIFICALL Y DISCLAIMS THE IMPLIED WARRANTIES OR MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. TO THE EXTENT ALLOWED BY APPLICABLE LAW, IN NO
EVENT SHALL HEWLETT-PACKARD COMPANY BE LIABLE FOR ANY INCIDENTAL,
CONSEQUENTIAL, SPECIAL, INDI RECT, PUNITIVE, OR EXEMPLARY DAMAGES OR LOST
PROFITS FROM ANY BREACH OF THIS WARRANTY OR OTHERWISE.

In the event that your product proves to be defective, please return to place of purchase with a written
description of the problem.

C9660-90901 Chapter 2 Service approach 49

HP maintenance agreements

HP has several types of maintenance agreements that meet a wide range of support needs.
Maintenance agreements are not part of the standard warranty. Support services may vary by
area. Check with your local HP dealer to determine the services available to you.

On-site service agreements

To provide you with the lev el of support best suited to your needs, HP has on-site service
agreements with three response times.

Priority on-site service

This agreement provides 4-hour service response to your site for calls made during normal HP
business hours.

Next-day on-site service

This agreement provides support by the next working day following a service request. Extended
coverage hours and extended travel beyond HP’s designated service zones are available on most
on-site agreements (for additional charges).

Weekly (volume) on-site service

This agreement provides scheduled weekly on-site visits for organizations with many HP products.
This agreement is designated for sites using 25 or more workstation products, including printers,
plotters, computers, and disk drives.

For more information on HP service agreements, call [phone] (U.S.) or [phone]
(Canada).

50 HP mai nten ance agr ee men ts C9660-90901

3

Installation and configuration

Chapter contents

Unpack the printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Unpacking the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Installing the media tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Connecting power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Installing the print cartridges. . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Installing a new overlay (optional). . . . . . . . . . . . . . . . . . . . . . . 59

Testing the printer operation. . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Using PowerSave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Connecting to a computer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Parallel connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Network connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Enhanced I/O (EIO) configuration. . . . . . . . . . . . . . . . . . . . . . . . . . 64

HP Jetdirect print servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Available enhanced I/O interfaces . . . . . . . . . . . . . . . . . . . . . . 64

NetWare networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Windows and Windows NT networks . . . . . . . . . . . . . . . . . . . . 65

AppleTalk networks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

LocalTalk configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

LocalTalk network configuration . . . . . . . . . . . . . . . . . . . . . . . . 65

UNIX/Linux networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Printer drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Available drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Additional drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Network configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Configuring the printer for the network . . . . . . . . . . . . . . . . . . . 68

Configuring Novell NetWare frame type parameters . . . . . . . . 68

Setting network security on the printer . . . . . . . . . . . . . . . . . . . . . . 69

Locking the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Using an ASCII PJL escape sequence to

set network security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

C9660-90901 Chapter 3 Installation and configuration 51

Unpack the printer

1

2

Figure 3-1 Package contents

1 HP Color LaserJet 4600 series printer
2 print cartridges
3 software and electronic documentation
4 printed documentation
5 power cord

1

3

4

5

2

3

Figure 3-2 Optional package contents

1 optional 500-sheet paper feeder (Tray 3)
2 control panel overlays
3 parallel cable

52 Unpack the printer C9660-90901

Unpacking the printer

Note Save all the packing materials in case you need to repack and transport the printer at a later date.

WARNING! The printer weighs approximately 36 kg (80 lb). HP recommends having two or more people lift or

move the printer.
1 Do not cut the straps. Open the top flaps of the packing box. Detach the straps from the top flaps

and lay them on the floor.

2 Lift the box frame up and off the printer.

3 If the printer has an optional 500-sheet paper feeder, it is packaged on top of the printer. Lift the

500-sheet paper feeder from the package, and place it in the prepared location.

C9660-90901 Chapter 3 Installation and configuration 53

4 Remove the shipping blocks, accessory packs, and inner cardboard frame that surrounds the

Je

tLink

FIH

FIR

E

103

E102

E101

printer.

3
0
1
E

2
0
1
E

k
n
i
L
t
e
J

H
I
F

R
I
F

1
0
1
E

5 Lift the printer from the packing pallet and place it in the prepared location. T w o people must lift

and move the printer.

6 If you are using an optional 500-sheet paper feeder, align the printer with the guidepins on top

of the 500-sheet paper feeder.

54 Unpack the printer C9660-90901

7 Remove the packing tape from the front and rear of the printer.

8 Using the side handles, open the top cover. Firmly lift the two green handles on either side of the

fuser. Lift the fuser cover completely, and pull on either of the orange tabs to remove the fuser

packing tape and plastic shipping locks. Close the fuser cover.

9 Open the front cover and remove the packing tape from the transfer unit. Close the front cover

and the top cover.

C9660-90901 Chapter 3 Installation and configuration 55

Installation

Installing the media tray

1 Remove the tray from the printer. Push the media lift plate down until it locks. Remove the

2 Adjust the rear length guide by squeezing the guide adjustment latch and sliding the back of

3 Load media face-up. Make sure that the front corners of the media fit under the front corner

cardboard from the tray.

the tray to the length of the media being loaded. Slide the width guides to the desired size.

tabs.

4 Slide the media input tray straight into the slot at the bottom of the printer.

56 Installation C9660-90901

Connecting power

1 Plug the AC power cord into the printer and into the power outlet.

2 Turn the printer on.

Installing the print cartridges

1 Open the top cover. Grasp the green handle on the transfer unit and pull down. The front cover

will open as you pull down the transfer unit.

CAUTION Do not place anything on the transfer unit while it is open. If the transfer unit is punctured, print quality

problems may result.
2 Grasp both sides of the cartridge and distribute the toner by gently rocking the cartridge from

side to side.

C9660-90901 Chapter 3 Installation and configuration 57

3 Remove the tape from the orange shipping lock. Remove and discard the orange shipping lock.

4 Remove the inside sealing tape by pulling the orange loop on the end and pulling the tape

completely out. Discard the tape.

5 Grasp the blue handles on the sides of the print cartridge. Insert the print cartridges, starting

with the bottom cartridge, in the position shown (C = cyan, Y = yellow, M = magenta,
K=black).

6 Close the transfer unit and front cover. Close the top cover. After a short while, the control

panel should display

READY.

58 Installation C9660-90901

Installing a new overlay (optional)

Some printer models are shipped without the control panel overlay installed. Overlays are available
for several languages. If you are setting up a printer for a language other than English, follow this
procedure.

1 Position the new overlay over the top of the control panel. Insert the left tab of the overlay into the

slot on the printer face. Line up the tab on the right side of the overlay with the slot on the right

side of the control panel. Set the overlay in place by pushing down on the overlay near the blue

button.

2 The control panel displays

highlighted. Press to save the preferred language.

LANGUAGE in English. Press until the preferred language is

Testing the printer operation

Print a configuration page to ensure the printer is working properly.

1 Press to enter the
2 Press to highlight
3 Press to select
4 Press to highlight
5 Press to select

MENUS.

INFORMATION.

INFORMATION.

PRINT CONFIGURATION.

PRINT CONFIGURATION.

C9660-90901 Chapter 3 Installation and configuration 59

Using PowerSave

The adjustable PowerSave Time feature reduces power consumption when the printer has been
inactive for an extended period. You can set the length of time before the printer goes into
PowerSave mode to
The default setting is

Note The printer display dims when the printer is in PowerSave mode.

PowerSave mode does not affect printer warm-up time.

To set PowerSave Time

1 Press to enter the MENUS.

1 MINUTE, 15 MINUTES, 30 MINUTES, or to 1 HOUR, 2 HOURS, or 4 HOURS.

30 MINUTES.

2 Press to highlight
3 Press to select
4 Press to highlight
5 Press to select
6 Press to highlight
7 Press to select
8 Press or to select the appropriate time period.
9 Press to set the time period.
10 Press P

AUSE/RESUME.

CONFIGURE DEVICE.

CONFIGURE DEVICE.

SYSTEM SETUP.

SYSTEM SETUP.

POWERSAVE TIME.

POWERSAVE TIME.

To disable/en able PowerSave

1 Press to enter the MENUS.
2 Press to highlight
3 Press to select
4 Press to highlight
5 Press to select
6 Press to highlight

CONFIGURE DEVICE.

CONFIGURE DEVICE.

RESETS.

RESETS.

POWERSAVE.

7 Press to select
8 Press or to select
9 Press to set the selection.
10 Press P

60 Installation C9660-90901

AUSE/RESUME.

POWERSAVE.

ON or OFF.

Connecting to a computer

The HP Color LaserJet 4600 printer supports network and parallel connections at the same time.

Parallel connections

A parallel connection is made by connecting the printer to the computer using a bidirectional parallel
cable (IEEE-1284 compliant) with a c-connector plugged into the printer’s parallel port. The cable can
be a maximum of 10 meters (30 feet) long.

When used to describe a parallel interface, the term bidirectional indicates that the printer is able to
both receive data from the computer and send data to the computer through the parallel port.

Figure 3-3 Parallel port connection

Note To use the enhanced capabilities of the bidirectional parallel interface, ensure that the most recent

printer driver is installed. These enhanced capabilities include bidirectional communication between
the computer and printer, faster transfer of data, and automatic configuration of printer drivers.

Note Factory settings support automatic switching between the parallel port and one or more network

connections on the printer.

C9660-90901 Chapter 3 Installation and configuration 61

Network connections

You may connect the printer to a network in several ways.

Direct to network

Connect one end of the network cable to the RJ-45 port on the Jetdirect print server card. Connect
the other end to the network.

Figure 3-4 Direct to network connection

Network print server

Connect one end of a network cable into the server. Connect the other end to the network. Connect
one end of a second network cable to the printer and the other end to the network.

Figure 3-5 Network print server connection

62 Connecting to a computer C9660-90901

Peer to peer (direct to network)

Connect one end of a network cable to the computer. Connect the other end to the network. Connect
one end of a second parallel cable to the printer and the other end to the network.

Figure 3-6 Peer to peer connection (direct to network)

Peer to peer (parallel)

Connect two or more computers to the network hub using network cables. Connect one end of a
parallel cable to the printer. Connect the other end to a computer.

Figure 3-7 Peer to peer connection (parallel)

C9660-90901 Chapter 3 Installation and configuration 63

Enhanced I/O (EIO) configuration

This printer comes equipped with three enhanced input/output (EIO) slots. The three EIO slots hold
compatible external devices such as the HPJetdirect p rint server network cards or other devices.
Plugging EIO network cards into the slots increases the number of network interfaces available to
the printer.

EIO network cards can maximize printer performance when you are printing from a network. In
addition they provide the ability to place the printer anywhere on a network. This eliminates the
need to attach the printer directly to a server or a workstation and enables you to place the printer
closer to the network users.

If the printer is configured through an EIO network card, configure that card through the control
panel Configure device menu.

HP Jetdirect print servers

HP Jetdirect print servers (network cards) can be installed in one of the printer’s EIO slots. These
cards support multiple network protocols and operating systems. HP Jetdirect print servers
facilitate network management by allowing you to connect a printer directly to your network at any
location. HP Jetdirect print servers also support the Simple Network Management Protocol
(SNMP), which provides network managers with remote printer management and troubleshooting
through HP Web Jetadmin software.

Note Installation of these cards and network configuration should be performed by a network administrator.

Configure the card either through the control panel or with HP Web Jetadmin software.

Note Refer to the HP Jetdirect print server documentation for information on which external devices or

EIO network cards are supported.

Available enhanced I/O int e rfa c e s

HP Jetdirect print servers (network cards) provide software solutions for:

● Novell NetWare

● Microsoft Windows and Windows NT network s

● Apple Mac OS (LocalTalk)

● UNIX (HP-UX and Solaris)

● Linux (Red Hat and SuSE)

● Internet printing

For a summary of available network software solutions, refer to the HP Jetdirect Print Server
Administrator’s Guide, or visit HP Customer Care online at http://www.hp .com/support/net_printing

NetWare net works

When using Novell NetWare products with an HP Jetdirect print server, Queue Server mode
provides improved printing performance over Remote Printer mode. The HP Jetdirect print server
supports Novell Directory Services (NDS) as well as bindery modes. For more information, see the
HP Jetdirect Print Server Administrator’s Guide.

.

For Windows 95, 98, ME, NT 4.0, 2000, and XP systems, use the printer installation utility for
printer setup on a NetWare network.

64 Enhanced I/O (EIO) configuration C9660-90901

Windows and Windows NT networ ks

For Windows 95, 98, ME, NT 4.0, 2000, and XP systems, use your printer installation utility for
printer setup on a Microsoft Windows network. The utility supports printer setup for either
peer-to-peer or client-server network operation.

AppleTalk networks

Use the HP LaserJet Utility to set up the printer on an EtherTalk or LocalTalk network. For more
information, refer to the HP Jetdirect Print Server Administrator’s Guide included with printers
equipped with the HP Jetdirect print server.

LocalTalk config uratio n

The LocalT alk interface enables you to print directly from a stand-alone Apple Macintosh computer or
from a Macintosh computer on a LocalTalk network. For specific information on configuring the
computer and printer to print through a LocalTalk interface, ref er to the printer’s getting started guide
and the HP Jetdirect Print Server Administrator’s Guide.

Note For LocalTalk configuration, the DIN-8 printer cable must be connected to the printer port of the

Macintosh computer.

LocalTalk network configuration

To connect the printer to a Macintosh computer on a LocalTalk network, use the HP LocalT alk Cable
Kit. You will need a kit for each printer and an additional kit for each Macintosh computer on the
network.

UNIX/Linux networks

Use the HP Jetdirect printer installer for UNIX utility to set up the printer on HP-UX or Sun Solaris
networks.

For setup and management on UNIX or Linux networks, use HP Web Jetadmin.
To obtain HP software for UNIX/Linux networks, visit HP Customer Care online at

http://www.hp.com/support/net_printing

print server, see the HP Jetdirect Print Server Administrator’s Guide included with printers equipped
with the HP Jetdirect print server.

. For other installation options supported by the HP Jetdirect

C9660-90901 Chapter 3 Installation and configuration 65

Printer drivers

The optimal way to control the printer is through settings in a software application or through the
printer driver. Changing print settings via a software application affects only that particular print job.
Most software applications allow you to choose print settings from menus within the application.
Software application settings and printer driver settings override the settings on the printer control
panel.

For best print quality, always select the paper or media type in the printer driver. Different media
types use different printer settings. For example, selecting transparencies in the driver causes the
printer to use a different color table, one designed for maximum print quality on transparencies.
Additionally, transparencies cause the printer to adjust printer speed and fuser temperature.

Other media types affect the printer settings as well: Selecting heavy or glossy media, for example,
causes the printer to change the engine speed.

The printer driver also gives you customized control of color text, graphics, and photos. Use the
printer driver to set the following color control options:

● Print in Grayscale

● Halftone options

● Neutral Grays

● Edge Control

● RGB Color

See the printer driver’s online Help for details on color settings and their effect on printed output.

Available drivers

The following printer drivers are included with the printer.

Table 3-1 Printer drivers

Operating system

Windows 95, 98, ME X X X
Windows NT 4.0 X X X
Windows 2000 X X X
Windows XP X X X
Macintosh OS X

1

Not all printer features are available from all drivers or operating systems. See the online Help in your driver for

availability of features.

Note If your system did not automatically check the Internet for the latest drivers during

software installation, download them from http://www.hp.com/support/lj4600
select Downloads and Drivers to find the driver you wish to download.

1

PCL 5c PCL 6 PS

. Once connected,

66 Printer drivers C9660-90901

Additional drivers

The following drivers are not included on the CD-ROM, but are available from the Internet or from
HP Customer Care.

● OS/2 PCL 5c/6 printer driver

● OS/2 PS printer driver

● Windows NT 3.51 PCL 5c, Windows NT 3.51 PS

● UNIX model scripts

● Linux drivers

● Windows 3.1x (HP LaserJet 4500 driver)

Note The OS/2 drivers are available from IBM and are packaged with OS/2. They are not available for

Traditional Chinese, Simplified Chinese, Korean, and Japanese.

Note For more information about Windows 3.1x drivers, go to http://www.hp.com/support/lj4600.

C9660-90901 Chapter 3 Installation and configuration 67

Network configuration

Configuring the printer for the network

You can configure certain network parameters on the printer from the printer control panel or, for
most networks, from the HP Web Jetadmin software (or the HP LaserJet Utility for Macintosh). The
utilities are provided on the printing software CD-ROM that comes with the printer. You can also set
these parameters from the HP Web Jetadmin software, which is available at

http://www.hp.com/go/webjetadmin

For a complete list of supported networks and for instructions on configuring network parameters
from software such as HP Web Jetadmin, see the HP Jetdirect Print Server Software Installation
Guide. The guide comes on the CD-ROM with printers in which an HP Jetdirect 610N print server
is installed.

Configuring Novell NetWare frame type parameters

The HP Jetdirect 610N print server automatically selects a NetWare frame type. Select a frame
type manually only when the print server selects an incorrect frame type. To identify the frame type
chosen by the HP Jetdirect 610N print server, print a configuration page.

.

68 Network configuration C9660-90901

Setting network security on the printer

This printer features control panel locking, which allows network administrators to prevent users from
changing certain printer control panel settings. When a menu is locked, unauthorized users trying to
change settings in the printer control panel will receive the following message:

ACCESS DENIED
MENUS LOCKED

You can use HP Web Jetadmin software, the HP LaserJet Utility for Macintosh, or an ASCII escape
sequence to perform this procedure. For instructions on locking the printer control panel using either
the HP Web Jetadmin software or the HP LaserJet Utility for Macintosh, see the online Help for these
utilities.

Locking the control panel

You can prevent users from changing printer control panel settings by establishing a password and
locking the printer control panel. You can choose from multiple levels of security . You can lock certain
control panel menus, allowing users to change the rest of the menus, or you can lock all of the
menus—and you can even lock the C

Levels of security

Table 3-2 Printer security levels

ANCEL JOB button.

Lock setting Control panel items locked

OFF Service menu (locked with factory set PIN)
LOW I/O submenu

System setup submenu
Resets submen u
Service menu (locked with factory set PIN)

MEDIUM Configure Device menu (including all submenus)

Diagnostics menu
Service menu (locked with factory set PIN)

HIGH Information menu

Paper Handling menu
Configure Device menu (including all submenus)
Diagnostics menu
Service menu (locked with factory set PIN)

C

ANCEL JOB button

Use HP Web Jetadmin software, HP LaserJet Utility for Macintosh, or an ASCII escape sequence to
set security. HP software, which comes on the software CD-ROM, is easier to use than an ASCII
escape sequence. For instructions about locking the control panel by using either HP Web Jetadmin
software or the HP LaserJet Utility for Macintosh, go to the online Help for that software.

C9660-90901 Chapter 3 Installation and configuration 69

Using an ASCII PJL escape sequence to set network security

If you decide to use the ASCII escape sequence, you must use an MS-DOS® or Windows ASCII
editor to create the commands. The commands must also be sent to the printer by using a DOS
COPY command or an ASCII file download utility. The PJL Technical Reference Manual is located
on CD-ROM, part number 5961-0976. Order a copy of this manual from the HP website:

http://www.hp.com

Note In the following examples, EC represents the escape character. For more information on using escape

characters, see the PJL Technical Reference Manual.

● To lock or unlock the printer control panel if a password has not been set, send the following

ASCII sequence to the printer:

EC%-12345X@PJL JOB
@PJL DEFAULT CPLOCK=NONE

(or MINIMUM, MODERATE, or MAXIMUM)
@PJL EOJ
EC%-12345X

● To set the password, send the following ASCII sequence to the printer:

EC%-12345X@PJL JOB
@PJL DEFAULT PASSWORD=[numeric password (0 to 65535)]
@PJL EOJ
EC%-12345X

.

● To lock or unlock the control panel if the password has been set, send the following ASCII

sequence to the printer:

EC%-12345X@PJL JOB PASSWORD=(numeric password)
@PJL DEFAULT CPLOCK=NONE

(or MINIMUM, MODERATE, or MAXIMUM)
@PJL EOJ
EC%-12345X

70 Setting network security on the printer C9660-90901

4

Printer maintenance

Chapter contents

Cleaning the printer and accessories . . . . . . . . . . . . . . . . . . . . . . . 72

Cleaning spilled toner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Approximate replacement intervals for supply items. . . . . . . . . . . . 73

ETB life under different circumstances . . . . . . . . . . . . . . . . . . 74

Locating supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Replacing supply items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Changing print cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Replacing the transfer unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Replacing the fuser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Printer memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Installing memory and font DIMMs . . . . . . . . . . . . . . . . . . . . . 85

Installing an HP Jetdirect print server card . . . . . . . . . . . . . . . . 88

C9660-90901 Chapter 4 Printer maintenance 71

Cleaning the printer and accessories

Clean the outside surfaces with a water-dampened cloth. Observe the warning and caution below.

WARNING! Before you begin these steps, turn the printer off and unplug all power cords to avoid shock hazard.

Be careful when cleaning around the fuser area. It might be hot.

CAUTION T o av oid permanent damage to the print cartridge, do not use ammonia-based cleaners on or around

the printer.
If toner gets on your clothes, wipe it off with a dry cloth and wash your clothes in cold water. Hot

water sets toner into fabric.

Table 4-1 Cleaning the p rinter

Component Cleaning Method

Outside covers Use an HP Toner Cleaning Cloth (part number

5090-3379) or a water-dampened cloth. Do not use
solvents or ammonia-based cleaners.

Inside general With a dry lint-free cloth, wipe any dust, spilled

toner, and pap er particles from th e paper pa th area,
the registration roller, and the print cartridge cavity.

ETB attaching roller Clean with lint-free paper. If dirt cannot be remo v ed ,

dampen the paper with alcohol.

Paper pick up rollers Clean with lint-free p aper. If dirt cannot be removed,

dampen the paper with alcohol.

Color registration
detection unit

Clean with lint-free p aper. If dirt cannot be re mo v ed,
dampen the paper with alcohol.

Cleaning spilled toner

Defective print cartridges can develop leaks. Also, after a paper jam has occurred, some toner
might remain on the rollers and guides inside the printer. The pages that print immediately after the
jam can pick up this toner.

CAUTION When cleaning the printer, do not touch the ETB with the damp cloth or with your fingers.

Vacuum specifications

Do not vacuum the printer or any spilled toner using a conventional vacuum. Toner particles used in
this product might be too fine for effective vacuuming and could result in damage to conventional
vacuums.

A vacuum specifically designed for cleaning toner can be used if it is capable of filtering fine
particles (5 microns in diameter).

72 Cle ani ng the printer and accessories C9660-90901

Approximate replacement intervals for supply items

You can identify supply items by their labeling and their blue plastic handles For instructions on
installing supplies, see the installation guides supplied with each supply item.

The following table lists the approximate replacement intervals and part numbers for printer supply
items and the control panel messages that prompt you when it is time to replace each item.

Table 4-2 Approximate replacement intervals for supply items

Supply item Printer message Expected

life

Black (K)
print cartridge

Cyan (C)
print cartridge

Magenta (M)
print cartridge

Yellow (Y)
print cartridge

Image Transfer
kit (ETB)

Image Fuser kit

1. Approximate lives are based on 3,000 pages per month.

2. The approximate average A4/Letter-size page count is based on 5 percent coverage of individual

colors. Page counts are only estimations; usage conditions and print patterns cause results to vary.

3. Usage conditions and print patterns cause results to vary. See Figure 4-1 on page 74 for

more information.

REPLACE BLACK
CARTRIDGE

REPLACE CYAN
CARTRIDGE

REPLACE MAGENTA
CARTRIDGE

REPLACE YELLOW
CARTRIDGE

REPLACE
TRANSFER KIT

REPLACE FUSER KIT

9,000 pages

8,000 pages 22.7 months 6824A0001CN

8,000 pages 22.7 months 6823A001CN

8,000 pages 22.7 months 6822A001CN

120,000

3

pages
150,000

pages

Approximate
time period

2

2.7 months 6825A001CN

40 months RG5-6484-000CN

50 months RG5-6493-000CN

Part number

1

(see Table 8-1)

(see Table 8-1)

(see Table 8-1)

(see Table 8-1)

(see Table 8-1)

(110V)
RG5-6517-000CN
(220V)
(see Table 8-1)

CAUTION Hewlett-Packard recommends the use of HP products in this printer. Use of non-HP products can

cause problems that require service not covered by the Hewlett-Packard warranty or service
agreements.

C9660-90901 Chapter 4 Printer maintenance 73

ETB life under different circumstances

Depending on the printer workload, the customer will need to replace the ETB once or twice in the
life of the printer. In order to help plan supplies purchases, the HP Color LaserJet 4600 printer
calculates an estimated remaining number of pages that can be printed on the ETB and displays
this on the Supplies Status page under Transfer Kit: HP Part Number: HP C9724A. You can view
the Supplies Status page by printing it from the printer’s control panel. If the printer is connected to
the network, you can also view the page in your Web browser or through the HP Web Jetadmin
software.

The number of pages an ETB can print is a function of two factors:

● the number of times the belt goes from a stationary to a rotating state (spins up)

● the number of pages printed on the belt

Unless print jobs are queued back to back, each print job will require the belt to spin up.

Think of the ETB as having a limited number of wear units. It has 200,000 wear units when it is
new. Each time the belt spins up, it uses two wear units. Each time it prints a page, the belt uses
one wear unit.

Since most print jobs are not queued, the average number of pages per job, or job length, is a
factor in how fast the ETB will wear out. The shorter the average job, the faster the ETB will wear
out.

Figure 4-1 shows how many pages an ETB will print, given various average job lengths.

Figure 4-1 ETB total page count according to average job length

The printer assumes an average print job length of three pages to estimate how many pages are
remaining on the ETB. For an average job length of three pages, the ETB will print 120,000 pages.

If all print jobs are exactly three pages long, for each page printed the number of estimated pages
remaining would decrease by one, beginning with the maximum 120,000 pages. If the job’s length
is less than three pages, the estimated pages remaining number decreases more quickly than the
rate at which the number of pages actually printed increases. If the job’s length is greater than three
pages, the number of pages remaining decreases less quickly than the rate at which the actual
number of pages printed increases.

74 Approximate replacement intervals for supply items C9660-90901

Locating supplies

Figure 4-2 illustrates the location of each supply item.

1

2

3

Figure 4-2 Location of supplies

1 fuser
2 print cartridges
3 transfer unit (ETB)

C9660-90901 Chapter 4 Printer maintenance 75

Replacing supply items

Changing print cartridges

Replace a print cartridge when the printer control panel displays a REPLACE <COLOR> CARTRIDGE
message. The control panel display will also indicate the color that should be replaced (unless a
genuine HP cartridge is not currently installed).

1 Open the top cover. Grasp the green handle on the transfer unit and pull down. The front cover

will open as you pull down the transfer unit.

CAUTION Do not place anything on the transfer unit while it is open. If the transfer unit is punctured, print quality

problems may result.

2 Remove the used print cartridge from the printer.

3 Remove the new print cartridge from the bag. Place the used print cartridge in the bag for

recycling.

76 Replacing supply items C9660-90901

4 Grasp both sides of the cartridge and distribute the toner by gently rocking the cartridge from

side to side.

5 Remove the tape from the orange shipping lock. Remove and discard the orange shipping lock.

6 Remove the inside sealing tape by pulling the orange loop on the end and pulling the tape

completely out. Discard the tape.

C9660-90901 Chapter 4 Printer maintenance 77

7 Grasp the blue handles on the sides of the print cartridge. Align the print cartridge with the

tracks inside the printer and insert the cartridge until it is completely seated.

8 Installation is complete. Place the used print cartridge in the box in which the new cartridge

arrived. See the enclosed recycling guide for recycling instructions.

78 Replacing supply items C9660-90901

Replacing the transfer unit

Replace the transfer unit when the printer control panel displays: REPLACE TRANSFER KIT.

Note If you replace the transfer unit when it is not at the end of life, for instance if it is defective, you will need

to calibrate the printer and reset the transfer unit count through the control panel. See page 81 for
instructions.

1 Turn the printer off.
2 Using the side handles, open the top cover.
3 Grasp the green handle on the transfer unit and pull down. The front cover will open as you pull

down the transfer unit.

4 Locate the blue release buttons on either side of the transfer unit (near the bottom of the transfer

unit).

5 Grasp the transfer unit with two hands. Simultaneously press in the blue buttons on either side of

the transfer unit and slide the unit out of the printer.

C9660-90901 Chapter 4 Printer maintenance 79

6 Remove the new transfer unit from the bag. Place the used transfer unit in the bag for recycling.

See the enclosed recycling guide for recycling instructions.

7 Hold the transfer unit on either side. Guide the feet into the cups and slide the transfer unit into

the printer.

8 Close the transfer unit and front cover. Close the top cover and turn the printer on. After a short

while, the control panel should disp lay

NEW TRANSFER KIT=.

9 Press to highlight
10 Press to reset the transfer unit count.
11 Wait for the printer to calibrate.

YES.

80 Replacing supply items C9660-90901

Replacing the transfer unit when it is not at end of life

If you replace the transfer unit when it is not at the end of life, for instance if it is defective, you will
need to calibrate the printer and reset the transfer unit count through the control panel.

To calibrate the printer, do the following:

1 Press to enter the
2 Press to highlight
3 Press to select
4 Press to highlight
5 Press to select
6 Press to highlight
7 Press to select
8 Wait for the printer to calibrate.

To reset the transfer unit count, do the following:

1 Press to enter the
2 Press to highlight
3 Press to select
4 Press to highlight
5 Press to select
6 Press to highlight
7 Press to select

MENUS.

CONFIGURE DEVICE.

CONFIGURE DEVICE.

PRINT QUALITY.

PRINT QUALITY.

CALIBRATE NOW.

CALIBRATE NOW.

MENUS.

CONFIGURE DEVICE.

CONFIGURE DEVICE.

RESETS.

RESETS.

RESET SUPPLIES.

RESET SUPPLIES.

8 Press to highlight
9 Press to select
10 Press to highlight
11 Press to reset the transfer unit count.

NEW TRANSFER KIT.

NEW TRANSFER KIT.

YES.

C9660-90901 Chapter 4 Printer maintenance 81

Replacing the fuser

DOWN

WITH

THIS

LEVER

DOWNWITH
THISLEVER

Replace the fuser when the printer control panel displays REPLACE FUSER KIT.

1 Turn the printer off.
2 Using the side handles, open the top cover.

WARNING! The fuser might be hot. Wait 10 minutes before proceeding.

3 Completely loosen the blue thumb screws on either side of the fuser.

4 Grasp the ends and pull straight up to remove the fuser.

5 Remove the new fuser from the bag. Place the used fuser in the bag for recycling. See the

enclosed recycling guide for recycling instructions.

6 Grasp the sides of the fuser and push down firmly into the printer.

D
O

W
N

W
I

T

H
T
H
I
S

L
E
V

E
R

D
O

W

N

W

ITH
TH
IS

LE

V
ER

82 Replacing supply items C9660-90901

7 Tighten the blue thumb screws.

8 Close the top cover, and turn the printer on. After a short while, the control panel should display

NEW FUSER KIT=.

9 Press to highlight
10 Press to reset the fuser count.

YES.

Replacing the fuser when it is not at end of life

If you replace the fuser when it is not at the end of its life , f or instance if it is defective, y ou will need to
reset the fuser count through the control panel.

To reset the fuser count, do the following:

1 Press to enter the
2 Press to highlight
3 Press to select
4 Press to highlight
5 Press to select
6 Press to highlight
7 Press to select
8 Press to highlight
9 Press to select

MENUS.

CONFIGURE DEVICE.

CONFIGURE DEVICE.

RESETS.

RESETS.

RESET SUPPLIES.

RESET SUPPLIES.

NEW FUSER KIT.

NEW FUSER KIT.

10 Press to highlight
11 Press to reset the fuser count.

C9660-90901 Chapter 4 Printer maintenance 83

YES.

Printer memory

The printer has five dual in-line memory module (DIMM) slots.

Note For maximum flexibility in DIMM support, the formatter is designed with four 168-pin DIMM slots and

a fifth 100-pin DIMM slot. Due to technical limitations, only four DIMMs can be loaded at a time, so
the fifth DIMM slot (100-pin) is logically the same as the fourth DIMM slot (168-pin). The system can
only have a DIMM installed on the fourth DIMM slot (168-pin) provided that no DIMM is installed in
the fifth DIMM slot (100-pin) and vice versa.

Use these DIMM slots to upgrade the printer with:

● more printer memory - DIMMs are available in 64, 128, and 256 MB

● flash memory DIMMs - available in 4 MB; unlike standard printer memory, flash DIMMs can be

used to permanently store downloaded items in the printer, even when the printer is off

● DIMM-based accessory fonts, macros, and patterns

● other DIMM-based printer langu age s and printer options

Note Single in-line memory modules (SIMMs) used on previous HP LaserJet printers are not compatible

with the printer.
Before ordering additional memory, print a configuration page to see how much memory is

currently installed.

1 Press to enter the
2 Press to highlight
3 Press to select
4 Press to highlight
5 Press to select

MENUS.

INFORMATION.

INFORMATION.

PRINT CONFIGURATION.

PRINT CONFIGURATION.

84 Printer memory C9660-90901

Installing memory and font DIMMs

You can install more memory for the printer, and you can also install a font DIMM to allow the printer
to print characters for languages such as Chinese or the Cyrillic alphabet.

CAUTION Static electricity can damage DIMMs. When handling DIMMs, either wear an antistatic wrist strap, or

frequently touch the surface of the DIMM antistatic package and then touch bare metal on the printer.
1 Turn the printer off, and disconnect all power and interface cables. Locate the formatter board in

the rear of the printer.

2 Remove the eight screws holding the board in place, and set them aside.

3 Slide out the formatter board and set it on a clean, flat, grounded surface.
4 Release the locks on each side of the DIMM slot.

5 Remove the DIMM from the antistatic package. Locate the alignment notches on the bottom

edge of the DIMM.

C9660-90901 Chapter 4 Printer maintenance 85

6 Holding the DIMM by the edges, align the notches on the DIMM with the bars in the DIMM slot.

Note

If you have difficulty inserting the DIMM or closing the latches, make sure the notches on the bottom
of the DIMM are aligned with the bars in the slot. If the DIMM still does not go in, make sure you are
using the correct type of DIMM.

7 Firmly press the DIMM straight into the slot. Close the locks on each side of the DIMM until

they snap into place.

8 Align the formatter board in the tracks at the top and bottom of the slot, and slide the board

back into the printer. Replace and tighten the eight screws removed in step 2.

9 Reconnect the power cable and interface cables, and turn the printer on.

86 Printer memory C9660-90901

Enabling memory

If you installed a memory DIMM, set the printer driver to recognize the newly added memory.

1 On the Start menu, point to Settings, and click Printers or Printers and Faxes.
2 Select this printer and select Properties.
3 On the Configure tab, click More.
4 In the Total Memory field, type or select the total amount of memory that is now installed.
5 Click OK.

Enabling the language font DIMM

If you installed a language font DIMM in the printer, you must select the Font DIMM option in the
printer driver for the font DIMM to work properly. To enable f onts from the PCL 5c and PCL 6 printer
drivers for Windows, follow this procedure:

1 On the Start menu, point to Settings, and click Printers.
2 Select this printer and select Properties.
3 On the Configure tab, click More.
4 Select the Font DIMM check box.
5 In the Configure Font DIMMs dialog box, click Add to add the font file.
6 In the Add Font DIMM dialog box, browse to the location of the font file, select the font file, and

click OK.
7 In the Configure Font DIMMs dialog box, select the installed DIMM.
8 Click OK.

Checking DIMM ins tallation

Check that the DIMMs are installed correctly and working.
1 Turn the printer on. Check that the Ready light is on after the printer has gone through the

startup sequence. If an error message appears, a DIMM may have been incorrectly installed.

2 Print a configuration page.
3 Check the Installed Personalities and Options section on the configuration page and compare it

with the configuration page printed before the DIMM installation.
4 If the amount of recognized memory has not increased:

• The DIMM may not be installed correctly. Repeat the installation procedure.

• The DIMM may be defective. Try a new DIMM.

C9660-90901 Chapter 4 Printer maintenance 87

Installing an HP Jetdirect print server card

You can install an HP Jetdirect print server card in the base model printer, which comes with an
open EIO slot.

1 Turn the printer off, and disconnect all power and interface cables.
2 Locate an empty EIO slot. Loosen and remove the two retaining screws holding the cover for

the EIO slot onto the printer, and then remove the cover. You will not need these screws and
cover again.

3 Firmly insert the HP Jetdirect print server card into the EIO slot. Insert and tighten the retaining

screws that came with the print server card.

4 Connect the network cable. Reconnect the power cable, and turn the printer on.
5 Print a configuration page. In addition to a printer configuration page, an HP Jetdirect

configuration page that contains network configuration and status information should also print.
If it does not print, uninstall and reinstall the print server card to ensure that it is completely

seated in the slot.

6 Perform one of these steps:

• Choose the correct port. See the computer or operating system documentation for
instructions.

• Reinstall the software, choosing the network installation this time.

88 Printer memory C9660-90901

5

Theory of operation

Chapter contents

Basic operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Operation sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Engine control system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

DC controller circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Motors and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Fuser power supply circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Heater temperature control. . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

High-voltage power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Low-voltage power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Formatter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

PowerSave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Printer memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

DIMM slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

PJL overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

PML. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Control panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Laser/scanner system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Scanner motor control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Image formation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Image formation process . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Print cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Toner level detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Electrostatic transfer/transport belt (ETB) unit . . . . . . . . . . . . 112

Electrostatic latent image formation block . . . . . . . . . . . . . . . 113

Development block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Transfer block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Fusing block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Cleaning block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Calibration and cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Color plane registration calibration . . . . . . . . . . . . . . . . . . . . . 122

Drum phase calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Image stabilization control . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Pickup/feed system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Pickup/feed unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Fuser/delivery unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Duplex feed unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

500-sheet paper feeder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Pickup and feed operations . . . . . . . . . . . . . . . . . . . . . . . . . . 135

C9660-90901 Chapter 5 Theory of operation 89

Basic operation

The HP Color LaserJet 4600 series printer’s functions are divided into four systems:

● engine control system

● laser/scanner system

● image formation system

● pickup/feed system

This chapter describes each of these systems thoroughly.

Figure 5-1 Basic system operation

90 Basic operation C9660-90901

Operation sequence

A microcomputer in the engine control system controls the operation sequence for the printer.
Table 5-1 describes the main operational periods from the point when the printer is turned on until a
print operation is completed and each motor stops rotating.

Note In the table below, "ETB" stands for "electrostatic transfer/transport belt." This component is described

later in this chapter, as are the other components mentioned in the table.

Table 5-1 Basic operation sequence

Period Purpose Remark

WAIT
(wait
period)

STBY
(standby
period)

INTR
(initial
rotations
period)

PRINT
(print
period)

LSTR
(last
rotations
period)

From the time the power
switch is turned on until the
ETB cleaning is completed.

From the end of the WAIT or
LSTR period or last rotation
until the formatter inputs a
print command or until the
power is turned off.

From immediately after the
formatter inputs a print
command until the /TOP
signal is sent to the formatter.

From the end of the INTR
period until the leading edge
detection sensor detects
paper and then turns off the
transfer positive bias.

From the end of the PRINT
period until the ETB motor
stops.

To clear a potential on the
drum surface and to clean the
ETB.

To keep the printer ready to
print.

To stabilize the photos ensiti v e
drum’s sensitivity in
preparation for a print
operation.

To form an image on the
photosensitive drum
according to the video signal
input from the f ormatter and to
transfer the ton er image to the
paper.

To deliver the paper out of th e
printer and to clean the ETB.

During this period, the printer
checks the toner level and
detects whether the cartridges
are presen t.
The printer also executes the
pulse width modulation
adjustment, color registration
adjustment, and image
density calibration control as
required.

When the formatter sends a
sleep command, the printer
enters PowerSave mode.

After the power is turned on,
the cartridge is cleaned every
35 pages and the ETB is
cleaned every 100 pages.

The last rot ations period lasts
until the instant the formatter
sends a print com mand. Then
the initial rotations period
starts again.

C9660-90901 Chapter 5 Theory of operation 91

Engine control system

The engine control system is the brain of the printer. It controls all the other systems according to
commands from the formatter. The engine control system consists of the following:

● DC controller PCB

● fuser power supply PCB

● high-voltage PCB

● low-voltage power supply unit

● formatter

Each of these components is described in the following sections.

Figure 5-2 Engine control system

Note In this manual, the abbreviation "PCB" stands for "printed circuit board assembly." Components

described as a PCB may consist of a single circuit board or a circuit board plus other parts, such as
cables and sensors.

92 Engine control system C9660-90901

DC controller circuit

The DC controller is responsible for controlling the print operation sequence for the printer. The
sequence of events is as follows:

1 Power is turned on.
2 The low-voltage power supply unit supplies DC power to the DC controller.
3 The CPU in the DC controller starts to control printer operations.
4 The printer enters the standby state.
5 Based on the print command and the image data input from the formatter, the CPU sends a

signal to drive the laser diode, the motors, and the solenoids.

Note See the general circuit diagram on page 307 for detailed information on the printer circuitry.

Figure 5-3 DC controller circuit

C9660-90901 Chapter 5 Theory of operation 93

Motors and fans

The printer has ten motors and two fans. Eight of the motors are DC motors; the other two are
stepping motors. Figure 5-4 shows the locations of the motors and fans. Table 5-2 explains the
function of each component.

One of the stepping motors and six of the eight DC motors are used for paper feeding and image
formation. The remaining stepping motor is the developing disengaging motor. The remaining two
DC motors are fan motors.

Since the printer transfers an image in four colors in line onto the paper , small changes in the
rotational speed of the motor are likely to cause color misalignment. The DC motors used for image
formation are precisely controlled to account for rotational speed fluctuation.

Figure 5-4 Motors and fans

94 Engine control system C9660-90901

Table 5-2 Function of motors and fans

Name Function Type Speed

switching

M1 Cyan cartridge motor

M2 Yellow cartridge motor

M3 Magenta cartridge motor

M4 Black cartridge motor

M5 Pickup motor Drives the pic kup ro ller

M6 ETB motor Drives the ETB DC motor 4-speed

M7 Developing disengaging motor Separates the

M8 Fuser motor Drives the pressure

F AN1 Formatter fan Exhausts heat around

Drives the
photosensitive drum

and feed roller

photosensitive drums
and the developing
cylinders

roller and delivery
roller

the formatter and
low-volta ge po wer
supply unit

DC motor

Stepping motor 4-speed

Stepping motor No

DC motor 4-speed

DC motor 2-speed

4-speed
(full, 1/2, 1/3, 1/4)

(full, 1/2, 1/3, 1/4)

(full, 1/2, 1/3, 1/4)

(full, 1/2, 1/3, 1/4)

(full during printing,
1/2 during standby)

F AN2 Cartridge fan Exhausts heat around

the fuser and
cartridges

DC motor No

(full speed during
printing only)

C9660-90901 Chapter 5 Theory of operation 95

Fuser power supply circuit

This printer uses an induction heating method to heat the fuser. Figure 5-5 shows the configuration
of the fuser power supply.

Figure 5-5 Fuser power supply circuit

The fuser power supply has three main components:

● Fuser sleeve. A high-frequency current flows through an induction heating coil in the fuser

sleeve, causing the metal sleeve to heat.

● Thermistors. Two thermistors are in the fuser sleeve: one in the center, and the other at the

end. Each thermistor monitors the temperature in the fuser sleeve.

● Thermoswitch. The thermoswitch is located at the bottom center of the fuser sleeve. When

the fuser is overheating, the switch opens, and power to the induction heating coil is shut off.

Table 5-3 Fuser temperatures

Media Temperature Engine speed

plain ~ 190° C (374° F) full speed
overhead transparencies ~ 172° C (342° F) color

~ 185° C (365° F) monochrome
thick ~ 185° C (365° F) 1/2 speed
gloss ~ 167° C (333° F) 1/3 speed
envelopes ~ 190° C (374° F) full speed

1/4 speed
1/2 speed

96 Engine control system C9660-90901

Heater temperature control

The heater temperature control detects the surface temperature of the fuser sleeve and controls the
current flowing to the induction heating coil. The heater temperature control circuit is shown in
Figure 5-6.

Figure 5-6 Heater temperature control circuit

The two thermistors that are attached to the fuser sleeve (TH1 and TH2) detect the surface
temperature of the fuser sleeve. The main thermistor (TH1) controls the fuser temperature, and the
sub thermistor (TH2) detects overheating at the end of the fuser sleeve. When the surface
temperature of the fuser sleeve increases, resistance of the two thermistors is reduced, and the
voltage of the main thermistor detection signal (MAINTH1) and the sub thermistor detection signal
(SUBTH1) drops.

The CPU (IC1012) on the DC controller monitors the voltage of the MAINTH1 and SUBTH1 signals.
The CPU sends the fuser temperature control signal (TMPCON) according to the voltage le vel.

The CPU sends the amperage control signal (PRANGE) to control the amperage of the fuser sleeve.

C9660-90901 Chapter 5 Theory of operation 97

High-voltage power supply

The high-voltage power supply circuit applies bias to the primary charging rollers, the toner
charging rollers, the developing cylinders, the attaching roller, and the transfer charging rollers.
Figure 5-7 shows the high-voltage power supply circuit.

Figure 5-7 High-voltage power supply circuit

98 Engine control system C9660-90901