HP (Hewlett-Packard) 9065, 9055 User Manual
hphpLaserJet 9055 mfp
LaserJet 9065 mfp
service manual
hp LaserJet 9055mfp (Q3631A)
hp LaserJet 9065mfp (Q3632A)
service manual
Copyright Information
© 2003 Copyright Hewlett-Packard Development
Company, L.P.
Reproduction, adaptation or translation without
prior written permission is prohibited, except as
allowed under the copyright laws.
The information contained herein is subject to
change without notice.
The only warranties for HP products and services
are set forth in the express warranty statements
accompanying such products and services.
Nothing herein should be construed as
constituting an additional warranty. HP shall not be
liable for technical or editorial errors or omissions
contained herein.
Part number: Q3631-90908
Edition 1, 11/2003
Trademark Credits
Microsoft®, Windows®, and Windows NT® are
U.S. registered trademarks of Microsoft
Corporation.
Contents
1 How to use this manual
Manual contents . . . . . . . . . . . . . . . . . . . . . . . . .2
Manual organization . . . . . . . . . . . . . . . . . . . . . .2
2 Safety
Safety and important warning items . . . . . . . . . .4
Important notices. . . . . . . . . . . . . . . . . . . . . 4
Description items for Warning, Caution,
and Note . . . . . . . . . . . . . . . . . . . . . . . 4
Safety warnings. . . . . . . . . . . . . . . . . . . . . . . . . . 5
Modifications not authorized by hp . . . . . . .5
Power supply. . . . . . . . . . . . . . . . . . . . . . . . 7
Installation requirements. . . . . . . . . . . . . .10
Measures to take in case of an accident. . 15
Conclusion . . . . . . . . . . . . . . . . . . . . . . . . 15
Regulatory statements . . . . . . . . . . . . . . . . . . .16
Safety information. . . . . . . . . . . . . . . . . . . . . . . 16
Safety circuits . . . . . . . . . . . . . . . . . . . . . .16
Overall protection circuit . . . . . . . . . . . . . . 16
Safety labels on the MFPs . . . . . . . . . . . . . . . . 19
Scanner section . . . . . . . . . . . . . . . . . . . .21
Laser/scanner assembly . . . . . . . . . . . . . .21
Rear cover. . . . . . . . . . . . . . . . . . . . . . . . . 21
3 MFP overview
Overview of system. . . . . . . . . . . . . . . . . . . . . .24
hp LaserJet 9055mfp/9065mfp product
specifications. . . . . . . . . . . . . . . . . . . . . . . 25
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Functions. . . . . . . . . . . . . . . . . . . . . . . . . . 25
Applicable copy paper. . . . . . . . . . . . . . . .26
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Particulars of machine. . . . . . . . . . . . . . . . 26
Maintenance and life. . . . . . . . . . . . . . . . . 26
Environmental conditions . . . . . . . . . . . . . 26
Central cross-sectional view . . . . . . . . . . . . . . . 27
Drive system diagram . . . . . . . . . . . . . . . . . . . . 28
Fuser/web drive section . . . . . . . . . . . . . .28
Drum drive section . . . . . . . . . . . . . . . . . . 29
Developing drive section . . . . . . . . . . . . . . 29
Paper feed/vertical conveyance/tray
up drive sections . . . . . . . . . . . . . . . .30
Tray 1 paper feed/automatic duplex
unit (ADU) pre-registration
drive section . . . . . . . . . . . . . . . . . . . 31
Charging and transfer/separation wire
cleaning drive section . . . . . . . . . . . . 32
Automatic Duplex Unit (ADU)
conveyance drive section . . . . . . . . . 33
Paper exit drive section . . . . . . . . . . . . . . 34
Toner supply drive section . . . . . . . . . . . . 34
Optics drive section . . . . . . . . . . . . . . . . . 35
4 MFP unit explanation
External section . . . . . . . . . . . . . . . . . . . . . . . . 40
Composition . . . . . . . . . . . . . . . . . . . . . . . 40
Drive section. . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Composition . . . . . . . . . . . . . . . . . . . . . . . 41
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 41
M2 (drum) control . . . . . . . . . . . . . . . . . . . 42
M4 (fuser) control . . . . . . . . . . . . . . . . . . . 42
Scanner section . . . . . . . . . . . . . . . . . . . . . . . . 44
Composition . . . . . . . . . . . . . . . . . . . . . . . 44
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 44
M11 (scanner) control. . . . . . . . . . . . . . . . 45
Exposure control . . . . . . . . . . . . . . . . . . . . 48
Original read control . . . . . . . . . . . . . . . . . 48
APS control. . . . . . . . . . . . . . . . . . . . . . . . 49
AE control . . . . . . . . . . . . . . . . . . . . . . . . . 51
Laser scanner unit . . . . . . . . . . . . . . . . . . . . . . 52
Composition . . . . . . . . . . . . . . . . . . . . . . . 52
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 52
M15 (polygon) control . . . . . . . . . . . . . . . . 53
Image write control . . . . . . . . . . . . . . . . . . 53
Drum unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Composition . . . . . . . . . . . . . . . . . . . . . . . 56
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 56
Separation claw control . . . . . . . . . . . . . . 57
Paper guide plate control . . . . . . . . . . . . . 57
Corona unit section. . . . . . . . . . . . . . . . . . . . . . 58
Composition . . . . . . . . . . . . . . . . . . . . . . . 58
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 58
Charging control . . . . . . . . . . . . . . . . . . . . 58
Transfer/separation control. . . . . . . . . . . . 59
Contents
ENWW iii
M14 (charger cleaning) control . . . . . . . . . 60
M10 (transfer/separation cleaning)
control . . . . . . . . . . . . . . . . . . . . . . . .61
PCL/TSL control . . . . . . . . . . . . . . . . . . . . 62
Developing unit . . . . . . . . . . . . . . . . . . . . . . . . . 63
Composition . . . . . . . . . . . . . . . . . . . . . . .63
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 63
M3 (developing) control. . . . . . . . . . . . . . . 63
Developing bias control. . . . . . . . . . . . . . . 64
Dmax (maximum contrast) control . . . . . . 65
Gradation correction control . . . . . . . . . . . 67
Dot diameter correction control . . . . . . . . .68
Toner density control. . . . . . . . . . . . . . . . . 69
FM4 (developing suction) control . . . . . . . 69
Toner supply unit. . . . . . . . . . . . . . . . . . . . . . . .70
Composition . . . . . . . . . . . . . . . . . . . . . . .70
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 70
Toner level detection control . . . . . . . . . . . 71
M12 (toner supply) control . . . . . . . . . . . .72
Cleaning/toner recycle unit . . . . . . . . . . . . . . . . 73
Composition . . . . . . . . . . . . . . . . . . . . . . .73
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 73
Toner guide roller (TGR) control . . . . . . . . 74
Other control . . . . . . . . . . . . . . . . . . . . . . .74
Tray 2/3 paper feed unit . . . . . . . . . . . . . . . . . .75
Composition . . . . . . . . . . . . . . . . . . . . . . .75
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 75
First paper feed control . . . . . . . . . . . . . . . 77
Paper up drive control. . . . . . . . . . . . . . . .79
Paper size detection control . . . . . . . . . . . 80
No paper detection control . . . . . . . . . . . . 81
Tray 4 paper feed unit . . . . . . . . . . . . . . . . . . . . 82
Composition . . . . . . . . . . . . . . . . . . . . . . .82
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 82
First paper feed control . . . . . . . . . . . . . . . 84
Paper up drive control. . . . . . . . . . . . . . . .86
Paper size detection control . . . . . . . . . . . 87
No paper detection control . . . . . . . . . . . . 87
Tray 1 (bypass tray) . . . . . . . . . . . . . . . . . . . . . 89
Composition . . . . . . . . . . . . . . . . . . . . . . .89
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 89
First paper feed control . . . . . . . . . . . . . . . 90
Paper up/down control . . . . . . . . . . . . . . .90
Paper size detection control . . . . . . . . . . . 91
No paper detection control . . . . . . . . . . . . 92
Vertical conveyance section . . . . . . . . . . . . . . . 93
Composition . . . . . . . . . . . . . . . . . . . . . . .93
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 93
Vertical conveyance control . . . . . . . . . . .93
Automatic duplex unit (ADU). . . . . . . . . . . . . . . 95
Composition . . . . . . . . . . . . . . . . . . . . . . .95
Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 96
Loop/second paper feed control . . . . . . .101
Paper conveyance control. . . . . . . . . . . .103
Paper reverse and exit control . . . . . . . . 104
ADF paper conveyance/feed control . . . 108
Fuser unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Composition . . . . . . . . . . . . . . . . . . . . . . 111
Mechanisms . . . . . . . . . . . . . . . . . . . . . . 111
M16 (web drive) control . . . . . . . . . . . . . 113
Fuser temperature control . . . . . . . . . . . 114
Other kinds of control . . . . . . . . . . . . . . . . . . . 116
Parts energized when SW1 (main
power) is off . . . . . . . . . . . . . . . . . . 116
Parts that operate when SW1 (main
power)/SW2 (secondary power)
is on . . . . . . . . . . . . . . . . . . . . . . . . 117
Cooling fan control . . . . . . . . . . . . . . . . . 118
Control panel control. . . . . . . . . . . . . . . . 122
Counter control . . . . . . . . . . . . . . . . . . . . 124
Option control . . . . . . . . . . . . . . . . . . . . . 126
5 MFP disassembly/assembly
External section . . . . . . . . . . . . . . . . . . . . . . . 132
Replacing the ozone filter . . . . . . . . . . . . 132
Replacing the developing suction filter . . 133
Removing and reinstalling the
external covers . . . . . . . . . . . . . . . . 133
Changing the control panel
attachment angle and
removing/reinstalling. . . . . . . . . . . . 136
Resetting the circuit breaker . . . . . . . . . . 137
Drive section. . . . . . . . . . . . . . . . . . . . . . . . . . 138
Removing and reinstalling the drum
motor (M2) . . . . . . . . . . . . . . . . . . . 138
Removing and reinstalling the fusing
input gear . . . . . . . . . . . . . . . . . . . . 140
Scanner section . . . . . . . . . . . . . . . . . . . . . . . 141
Screws that must not be removed . . . . . 141
Removing and reinstalling the CCD
unit . . . . . . . . . . . . . . . . . . . . . . . . . 141
Replacing the exposure lamp . . . . . . . . . 142
Removing and reinstalling the
exposure unit . . . . . . . . . . . . . . . . . 143
Installing the optics wire . . . . . . . . . . . . . 145
Cleaning the ADF glass and scanner
glass . . . . . . . . . . . . . . . . . . . . . . . . 147
Replacing the scanner motor (M11) . . . 148
Laser scanner unit . . . . . . . . . . . . . . . . . . . . . 150
Removing and reinstalling the laser/
scanner assembly. . . . . . . . . . . . . . 150
Cleaning the dust-proof glass. . . . . . . . . 151
Drum unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Removing and reinstalling the drum
unit . . . . . . . . . . . . . . . . . . . . . . . . . 152
Installing the coupling . . . . . . . . . . . . . . . 154
iv ENWW
Removing, cleaning, and reinstalling
the drum . . . . . . . . . . . . . . . . . . . . .155
Removing and reinstalling the
separation claws and separation
claw solenoid . . . . . . . . . . . . . . . . .156
Removing and reinstalling the toner
control sensor board . . . . . . . . . . . .158
Corona unit . . . . . . . . . . . . . . . . . . . . . . . . . . .159
Screws that must not be removed. . . . . . 159
Removing and reinstalling the charging
corona unit . . . . . . . . . . . . . . . . . . .159
Removing and reinstalling the charge
control plate . . . . . . . . . . . . . . . . . . 160
Replacing the charging wires . . . . . . . . .160
Removing and reinstalling the
charging wire cleaning unit . . . . . . . 161
Removing and reinstalling the PCL. . . . . 162
Cleaning the charging corona unit/PCL . 163
Removing and reinstalling the
transfer/separation corona unit . . . . 163
Removing and reinstalling the plunger
prevention plate . . . . . . . . . . . . . . . 164
Replacing the transfer/separation
wires and transfer/separation
wire cleaning block . . . . . . . . . . . . .164
Removing and reinstalling the TSL unit .166
Developing unit . . . . . . . . . . . . . . . . . . . . . . . .166
Screws that must not be removed. . . . . . 166
Removing and reinstalling the
developing unit . . . . . . . . . . . . . . . . 166
Replacing the developer . . . . . . . . . . . . .167
Cleaning the developing unit bias shaft . 168
Toner supply unit. . . . . . . . . . . . . . . . . . . . . . . 169
Replacing and cleaning the toner
bottle . . . . . . . . . . . . . . . . . . . . . . . .169
Cleaning/toner recycle unit . . . . . . . . . . . . . . .170
Removing and reinstalling the
cleaning blade. . . . . . . . . . . . . . . . .170
Removing and reinstalling the toner
guide roller (TGR) . . . . . . . . . . . . . . 171
Paper feed units of Trays 2 and 3. . . . . . . . . .173
Removing and reinstalling the paper
feed unit . . . . . . . . . . . . . . . . . . . . . 173
Removing and reinstalling the paper
feed Trays 2 and 3 . . . . . . . . . . . . .173
Removing and reinstalling the paper
pick roller and pick roller rubber . . . 174
Removing and reinstalling the
separation roller rubber. . . . . . . . . .174
Replacing the pre-registration and feed
clutches (MCs) . . . . . . . . . . . . . . . . 175
Replacing the wires. . . . . . . . . . . . . . . . . 176
Wire lengths . . . . . . . . . . . . . . . . . . . . . .178
Installing wires. . . . . . . . . . . . . . . . . . . . . 178
Paper feed unit of Tray 3 . . . . . . . . . . . . . . . . 179
Removing and reinstalling the paper
feed unit . . . . . . . . . . . . . . . . . . . . . 179
Removing and reinstalling paper feed
Tray 3 . . . . . . . . . . . . . . . . . . . . . . . 179
Removing and reinstalling the paper
pick roller and pick roller rubber . . . 179
Removing and reinstalling the
separation roller rubber. . . . . . . . . . 180
Replacing the pre-registration and feed
clutches (MCs) . . . . . . . . . . . . . . . . 181
Replacing the wires . . . . . . . . . . . . . . . . 182
Wire lengths . . . . . . . . . . . . . . . . . . . . . . 183
Installing wires . . . . . . . . . . . . . . . . . . . . 184
Tray 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Removing and reinstalling Tray 1 . . . . . . 185
Replacing the paper pick roller/paper
pick roller rubber. . . . . . . . . . . . . . . 185
Replacing the separation roller rubber . . 186
Vertical conveyance section . . . . . . . . . . . . . . 187
Removing and reinstalling the vertical
conveyance section . . . . . . . . . . . . 187
Removing and reinstalling the vertical
conveyance MC (MC11, MC12) . . . 187
ADF unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Pulling out and reinstalling the ADU
stand. . . . . . . . . . . . . . . . . . . . . . . . 188
Cleaning the paper mis-centering PS
(PS70)/leading edge PS (PS43) . . . 189
Removing and reinstalling the
registration MC (MC1) . . . . . . . . . . 190
Removing and reinstalling the
second paper feed unit
(registration assembly) . . . . . . . . . . 191
Cleaning the registration PS (PS44) . . . . 192
Removing and reinstalling the
registration roller . . . . . . . . . . . . . . . 193
Removing and reinstalling the
pre-transfer roller . . . . . . . . . . . . . . 194
Cleaning the automatic document
feeder paper reverse PS (PS45)/
Reverse/Exit PS (PS46) . . . . . . . . . 195
Removing and reinstalling the ADF
reverse roller. . . . . . . . . . . . . . . . . . 198
Removing and reinstalling the ADU
stand. . . . . . . . . . . . . . . . . . . . . . . . 199
Removing and reinstalling the
pre-registration roller. . . . . . . . . . . . 201
Removing and reinstalling the ADU
conveyance roller 3 and 4. . . . . . . . 202
Removing and reinstalling the ADU
conveyance roller 1 and 2. . . . . . . . 205
Removing and reinstalling the paper
reverse/exit roller . . . . . . . . . . . . . . 207
Contents
ENWW v
Fuser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208
Removing and reinstalling the fuser . . . . 208
Removing and reinstalling the fuser
(top). . . . . . . . . . . . . . . . . . . . . . . . . 208
Removing and reinstalling the web
cover . . . . . . . . . . . . . . . . . . . . . . . .209
Removing and reinstalling the
cleaning web . . . . . . . . . . . . . . . . . .210
Replacing the fusing heater lamps
(L2, L3) . . . . . . . . . . . . . . . . . . . . . .210
Replacing the fusing heater lamp (L4) . . 212
Removing and reinstalling the fusing
separation claw (upper) unit and
fusing separation claws (upper) . . . 213
Removing and reinstalling the fusing
separation claw (lower) unit and
fusing separation claws (lower). . . . 214
Removing and reinstalling the fusing
upper roller . . . . . . . . . . . . . . . . . . .214
Removing and reinstalling the fusing
lower roller . . . . . . . . . . . . . . . . . . . 215
Removing and reinstalling the
decurler roller . . . . . . . . . . . . . . . . . 216
Removing and reinstalling the fusing
temperature sensors 1 and 2 . . . . . 217
Removing and reinstalling the
thermostat/U (TS1) . . . . . . . . . . . . . 218
Removing and reinstalling the
thermostat/L (TS2) . . . . . . . . . . . . .220
6 Product comparison
hp LaserJet 9055mfp/9065mfp list of
differences. . . . . . . . . . . . . . . . . . . . . . . . 224
A Environmental Product
Stewardship Program
Environmental Product Stewardship
Program . . . . . . . . . . . . . . . . . . . . . . . . . 226
Protecting the environment . . . . . . . . . . .226
B Terminology cross-reference
Terminology cross-reference for the MFP. . . . 228
Index
vi ENWW
1How to use this
manual
Manual contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Manual organization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
How to use this manual
ENWW 1
Manual contents
The HP LaserJet 9055mfp/9065mfp Service Manual contains six separate documents. Each
document provides specific service information for one of the components that make up the
HP LaserJet 9055mfp/9065mfp. The following are the component documents, listed in the order
that they appear in the manual:
● HP LaserJet 9055mfp/9065mfp (main engine)
● Automatic document feeder
● 4000-sheet high capacity input
● Post insertion kit
● Punch kit
● Stapler/stacker and multifunction finisher
Manual organization
Each separate document contains its own table of contents and index. The tabs on the
right-hand pages help you identify the sections of the manual. The tab for the table of contents
in each document appears in magenta. The tabs for the remaining chapters in each document
appear in gray.
2 How to use this manual ENWW
2Safety
Safety and important warning items. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Important notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Description items for Warning, Caution, and Note. . . . . . . . . . . . . . . . . . 4
Safety warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Modifications not authorized by hp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Measures to take in case of an accident . . . . . . . . . . . . . . . . . . . . . . . . 15
Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Regulatory statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Safety circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Overall protection circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Safety labels on the MFPs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Scanner section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Laser/scanner assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Rear cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Safety
ENWW 3
Safety and important warning items
Read carefully the safety and important warning items described below to understand them
before doing service work.
Important notices
Because of possible hazards to an inexperienced person servicing this MFP as well as the risk
of damage to the MFP, HP strongly recommends that all servicing be performed only by
HP-trained service technicians.
Changes may have been made to this MFP to improve its performance after this service
handbook was printed. Accordingly, HP does not warrant, either explicitly or implicitly, that the
information contained in this service handbook is complete and accurate.
The user of this service handbook must assume all risks of personal injury and/or damage to
the MFP while servicing the MFP for which this service handbook is intended.
Therefore, this service handbook must be carefully read before doing service work both in the
course of technical training and even after that, for performing maintenance and control of the
MFP properly.
Keep this service handbook also for future service.
When it is impossible to read the description about safety and warnings (due to contamination
or tear), the relevant page should be replaced.
Description items for Warning, Caution, and Note
In this service handbook, Warning, Caution, and Note are defined as follows together with a
symbol mark to be used in a limited meaning.
When servicing the MFP, the relevant works (disassembling, reassembling, adjustment, repair,
maintenance, and so forth) need to be conducted with utmost care.
WARNING! Warning messages alert the reader to a specific procedure or practice which,
if not followed correctly, could cause personal injury or catastrophic loss of data
or equipment.
CAUTION Caution messages appear before procedures which, if not observed, could
result in loss of data or damage to equipment
Note Notes contain important information.
4Safety ENWW
Symbols used for safety and important warning items are defined as follows
Precaution when
using the MFP
Prohibition when
using the MFP
Direction when
using the MFP
General precaution Electric hazard High temperature
General prohibition Do not touch with wet hand Do not disassemble
General instruction Unplug Ground/Earth
Safety warnings
Modifications not authorized by hp
HP MFPs are renowned for their high reliability. This reliability is achieved through high-quality
design and a solid service network.
MFP design is a highly complicated and delicate process where numerous mechanical,
physical, and electrical aspects have to be taken into consideration, with the aim of arriving at
proper tolerances and safety factors. For this reason, unauthorized modifications involve a high
risk of degradation in performance and safety. Such modifications are therefore strictly
prohibited. The points listed below are not exhaustive, but they illustrate the reasoning behind
this policy.
WARNING: Prohibited actions
Safety
● Do not use any cables or power cord not specified by
HP.
● Do not use any fuse or thermostat not specified by
HP.
● Safety will not be assured, leading to a risk of fire
and injury.
● Do not disable fuse functions or bridge fuse
terminals with wire, metal clips, solder, or similar
object.
ENWW Safety warnings 5
WARNING: Prohibited actions
● Do not disable relay functions (such as wedging
paper between relay contacts).
● Do not disable safety functions (interlocks, safety
circuits, and so forth). Safety will not be assured,
leading to a risk of fire and injury.
● Do not make any modification to the MFP unless
instructed by HP.
● Do not use parts not specified by HP.
Note Only qualified service personnel should disable relay functions and safety functions
when it is necessary to solve problems.
Checkpoints when performing on-site service
HP MFPs are extensively tested before shipping to ensure that all applicable safety standards
are met, and to protect the customer and customer engineer (hereafter called the CE) from the
risk of injury. However, in daily use, any electrical equipment may be subject to parts wear and
eventual failure. In order to maintain safety and reliability, the CE must perform regular safety
checks.
6Safety ENWW
Power supply
WARNING: Wall outlet
● Check that main voltage is as specified. Plug the
power cord into the dedicated wall outlet with a
capacity greater than the maximum power
consumption.
● If excessive current flows in the wall outlet, fire may
result.
● If two or more power cords are plugged into the wall
outlet, the total load must not exceed the rating of
the wall outlet.
● If excessive current flows in the wall outlet, fire may
result.
kw
WARNING: Power plug and cord
● Make sure the power cord is plugged in the wall
outlet securely.
Contact problems may lead to increased resistance,
overheating, and the risk of fire.
● Check whether the power cord is damaged. Check
whether the sheath is damaged.
If the power plug, cord, or sheath is damaged,
replace with a new power cord (with plugs on both
ends) specified by HP. Using the damaged power
cord may result in fire or electric shock.
● When using the power cord (inlet type) that came
with this MFP, be sure to observe the following
precautions:
a Make sure the MFP-side power plug is securely
inserted in the socket on the rear panel of the
MFP.
Secure the cord with a fixture properly.
b If the power cord or sheath is damaged, replace
with a new power cord (with plugs on both ends)
specified by HP.
If the power cord (inlet type) is not connected to
the MFP securely, a contact problem may lead to
increased resistance, overheating, and risk of
fire.
Safety
ENWW Safety warnings 7
WARNING: Power plug and cord
●
Check whether the power cord is not stepped on or
pinched by a table and so on.
● Overheating may occur there, leading to a risk of
fire.
● Do not bundle or tie the power cord.
Overheating may occur there, leading to a risk of
fire.
● Check whether dust has collected around the power
plug and wall outlet.
Using the power plug and wall outlet without
removing dust may result in fire.
● Do not insert the power plug into the wall outlet with
a wet hand.
The risk of electric shock exists.
● When unplugging the power cord, grasp the plug,
not the cable.
The cable may be broken, leading to a risk of fire
and electric shock.
WARNING: Wiring
● Never use multi-plug adapters to plug multiple power
cords in the same outlet.
If used, the risk of fire exists.
8Safety ENWW
WARNING: Wiring
● When an extension cord is required, use a specified
one.
Current that can flow in the extension cord is limited,
so using an extension cord that is too long may
result in fire.
Do not use an extension cable reel with the cable
taken up. Fire may result.
WARNING: Ground lead
● Check whether the MFP is grounded properly.
If current leakage occurs in an ungrounded MFP,
you may suffer electric shock while operating the
MFP. Connect the ground lead to one of the
following points:
a Ground terminal of wall outlet
b Ground terminal for which Class D work has been
done
● Pay attention to the point where the ground lead is
connected.
Connecting the ground lead to an improper point as
listed below results in a risk of explosion and electric
shock:
a Gas pipe (A risk of explosion or fire exists.)
b Lightning rod (A risk of electric shock or fire
exists.)
c Telephone line ground (A risk of electric shock or
fire exists in the case of lightning.)
d Water pipe or faucet (It may include a plastic
portion.)
Safety
ENWW Safety warnings 9
Installation requirements
WARNING: Prohibited installation place
● Do not place the MFP near flammable materials
such as curtains or volatile materials that may catch
fire.
A risk of fire exists.
● Do not place the MFP in a place exposed to water
such as rain water.
A risk of fire and electric shock exists.
WARNING: Non-operational handling
● When the MFP is not used over an extended period
of time (holidays, and so forth), turn it off and unplug
the power cord.
Dust collected around the power plug and outlet may
cause fire.
CAUTION: Temperature and humidity
● Do not place the MFP in a place exposed to direct
sunlight or near a heat source such as a heater.
A risk of degradation in MFP performance or
deformation exists.
Do not place the MFP in a place exposed to cool
wind. Recommended temperature and humidity are
as follows:
Temperature: 10
Humidity: 10 percent to 80 percent (no dew
condensation)
° C to 30° C (50° F to 86° F)
CAUTION: Ventilation
● Do not place the MFP in a place where there is much
dust, cigarette smoke, or ammonia gas.
Place the MFP in a well-ventilated location to
prevent MFP problems and image issues.
10 Safety ENWW
CAUTION: Ventilation
● The MFP generates ozone gas during operation, but
it is not sufficient to be harmful to the human body.
If a bad smell of ozone is present in the following
cases, ventilate the room.
● When the MFP is used in a poorly ventilated
room
● When making a lot of copies
● When using multiple MFPs at the same time
CAUTION: Vibration
● When installing the MFP, read the installation guide
thoroughly. Be sure to install the MFP on a level and
sturdy surface.
Constant vibration will cause problems.
● Be sure to lock the caster stoppers.
In the case of an earthquake and so on, the MFP
may slide, leading to a injury.
CAUTION: Inspection before servicing
● Before conducting an inspection, read all relevant
documentation (service handbook, technical notices,
and so forth) and proceed with the inspection
following the prescribed procedure in safety clothes,
using only the prescribed tools. Do not make any
adjustment not described in the documentation.
If the prescribed procedure or tool is not used, the
MFP may break and a risk of injury or fire exists.
Safety
● Before conducting an inspection, be sure to
disconnect the power cords from the MFP and
optional accessories.
When the power plug is inserted in the wall outlet,
some units are still powered even if the power switch
is turned off. A risk of electric shock exists.
ENWW Safety warnings 11
CAUTION: Inspection before servicing
●
The area around the fuser unit is hot.
You may get burned.
WARNING: Work performed with the MFP powered
● Be careful when making adjustments or performing
an operation check with the MFP powered on.
If you make adjustments or perform an operation
check with the external cover detached, you may
touch live or high-voltage parts or you may be
caught in moving gears or the timing belt, leading to
a risk of injury.
● Be careful when servicing with the external cover
detached.
High-voltage exists around the drum unit. A risk of
electric shock exists.
WARNING: Safety checkpoints
● Check the exterior and frame for edges, burrs, and
other damage.
The user or CE may be injured.
● Do not allow any metal parts such as clips, staples,
and screws to fall into the MFP.
They can short internal circuits and cause electric
shock or fire.
● Check wiring for squeezing and any other damage.
Current can leak, leading to a risk of electric shock
or fire.
● When disconnecting connectors, grasp the
connector, not the cable. (Specifically, connectors of
the AC line and high-voltage parts.)
Current can leak, leading to a risk of electric shock
or fire.
12 Safety ENWW
WARNING: Safety checkpoints
● Carefully remove all toner remnants and dust from
electrical parts and electrode units such as a
charging corona unit.
Current can leak, leading to a risk of MFP trouble or
fire.
● Check high-voltage cables and sheaths for any
damage.
Current can leak, leading to a risk of electric shock
or fire.
● Check electrode units such as a charging corona
unit for deterioration and sign of leakage.
Current can leak, leading to a risk of trouble or fire.
● Before disassembling or adjusting the laser/scanner
assembly incorporating a laser, make sure that the
power cord has been disconnected.
The laser light can enter your eye, leading to a risk
of loss of eyesight.
● Do not remove the cover of the laser/scanner
assembly. Do not supply power with the
laser/scanner assembly shifted from the specified
mounting position.
The laser light can enter your eye, leading to a risk
of loss of eyesight.
Safety
● When replacing a lithium battery, replace it with a
new lithium battery specified in the parts guide
manual. Dispose of the used lithium battery using
the method specified by local authority.
Improper replacement can cause explosion.
● After replacing a part to which AC voltage is applied
(for example, optical lamp and fuser lamp), be sure
to check the installation state.
A risk of fire exists.
ENWW Safety warnings 13
WARNING: Safety checkpoints
●
Check the interlock switch and actuator for
loosening and check whether the interlock functions
properly.
If the interlock does not function, you may receive an
electric shock or be injured when you insert your
hand in the MFP (for example, when clearing a
paper jam).
● Make sure the wiring cannot come into contact with
sharp edges, burrs, or other pointed parts.
Current can leak, leading to a risk of electric shock
or fire.
● Make sure that all screws, components, wiring,
connectors, and so forth that were removed for
safety check and maintenance have been reinstalled
in the original location. (Pay special attention to
forgotten connectors, pinched cables, forgotten
screws, and so forth).
A risk of MFP trouble, electric shock, and fire exists.
WARNING: Handling of service materials
● Unplug the power cord from the wall outlet.
● Drum cleaner (isopropyl alcohol) and roller cleaner
(acetone-based) are highly flammable and must be
handled with care. A risk of fire exists.
● Do not replace the cover or turn the MFP on before
any solvent remnants on the cleaned parts have fully
evaporated.
A risk of fire exists.
● Use only a small amount of cleaner at a time and
take care not to spill any liquid. If this happens,
immediately wipe it off.
A risk of fire exists.
14 Safety ENWW
WARNING: Handling of service materials
● When using any solvent, ventilate the room well.
Breathing large quantities of organic solvents can
lead to discomfort.
● Toner and developer are not harmful substances,
but care must be taken not to breathe excessive
amounts or let the substances come into contact
with eyes, and so forth. It may be stimulative.
If the substances get in the eye, rinse with plenty of
water immediately. When symptoms are noticeable,
consult a physician.
● Never throw the used toner bottle and toner into fire.
You may be burned due to dust explosion.
Measures to take in case of an accident
If an accident has occurred, the distributor who has been notified first must immediately take
emergency measures to provide relief to affected persons and to prevent further damage.
If a report of a serious accident has been received from a customer, an on-site evaluation must
be carried out quickly and HP must be notified.
To determine the cause of the accident, conditions and materials must be recorded through
direct on-site checks, in accordance with instructions issued by HP.
Conclusion
Safety of users and customer engineers depends highly on accurate maintenance and
administration. Therefore, safety can be maintained by the appropriate daily service work
conducted by the customer engineer.
When performing service, each MFP on the site must be tested for safety. The customer
engineer must verify the safety of parts and ensure appropriate management of the equipment.
Safety
ENWW Safety warnings 15
Regulatory statements
FCC Class A Statement
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely
to cause harmful interference, in which case the user will be required to correct the interference
at his own expense. The end user of this product should be aware that any changes or
modifications made to this equipment without the approval of Hewlett-Packard could result in
the product not meeting the Class A limits, in which case the FCC could void the user’s authority
to operate the equipment.
Note Any changes or modifications to the MFP 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 A limits of
Part 15 of the FCC Rules.
Safety information
Safety circuits
This MFP is provided with the following safety circuits to prevent MFP issues from resulting in
serious accidents.
Overall protection circuit
L2 and L3 (fuser heater lamps) overheating prevention circuit
These safety circuits are described below to provide the service engineer with a renewed
awareness of them in order to prevent servicing errors that may impair their functions.
16 Safety ENWW
Overall protection circuit
CBR1
NF
CBR2
Protection by CBR1 and CBR2 (circuit breakers)
CBR1 and CBR2 interrupt the AC line instantaneously when an excessive current flows due to a
short in the AC line.
CAUTION The CBR1 and CBR2 functions must not be deactivated under any
circumstances.
Protection by L2, L3 and L4 (fuser heater lamps) overheating prevention circuit
DCPS
RL1
PRCB
TS2
TS1
Safety
RL1
TH2
Control
section
AC driver
section
TH1
L2
L3
L4
Protection by software
The output voltage from TH1 (fuser temperature sensor 1) is read by the CPU. If this voltage is
abnormal, L2 (fuser heater lamp 1), L3 (fuser heater lamp 2), L4 (fuser heater lamp 3) and RL1
(main relay) are turned off.
CAUTION Do not change the gap between the roller and TH1. When replacing TH1, check
the specified mounting dimensions. The RL1 function must not be deactivated
under any circumstances.
ENWW Safety information 17
Protection by the hardware circuit
The output voltages from TH1 and TH2 (fuser temperature sensors) are compared with the
abnormality judgment reference value in the comparator circuit. If the output voltage from TH1
or TH2 exceeds the reference value, L2 (fuser heater lamp 1), L3 (fuser heater lamp 2), L4
(fuser heater lamp 3) and RL1 (main relay) are turned off.
CAUTION Periodically check the TH2 face contacting the roller, and replace TH2 if any
abnormality is detected.
Since TH1 (fuser temperature sensor) face does not contact the roller, check
the distance from the roller and the sensor orientation if any abnormality is
detected.
The RL1 function must not be deactivated under any circumstances.
Protection by TS1 (thermostat/U) and TS2 (thermostat/L)
When the temperature of the fuser roller (upper/lower) exceeds the specified value, TSs are
turned off, thus interrupting the power to L2 (fuser heater lamp/1), L3 (fuser heater lamp/2), and
L4 (fuser heater lamp/3) directly.
CAUTION Do not use any other electrical conductor in place of TS1 and TS2. Do not
change the distance between the roller and TS (thermostat).
18 Safety ENWW
Safety labels on the MFPs
Caution labels shown below are attached in some areas on/in the MFP. When accessing these
areas for maintenance, repair, or adjustment, special care should be taken to avoid burns and
electric shock.
CAUTION
DO NOT INSERT
your finger into the
two RADF hinge
portions;
otherwise you may
be injured.
WARNING
This area generates
high voltage. If touched,
electrical shock may
occur. DO NOT TOUCH.
Safety
CAUTION
ATTENTION
VORSICHT
PRECAUCION
ATTENZIONE
CAUTION
DO NOT put your hand between
the main body and developing
fixing unit; otherwise you may
be injured.
CAUTION
High temperature!
Do not touch. Use care
when clearing paper.
ATTENTION
Temp rature lev e!
Risque de br lure. Soyez
prudent en retirant la
feuille coinc e.
VORSICHT
Hei§e OberflŠche!
Brandverletzungsgefahr.
Bei Beseitigung von
Papierstaus vorsichtig
vorgehen.
PRECAUCION
ÁTemperatura alta!
No tocar. Tener cuidado al
remover el papel.
ATTENZIONE
Alta temperatura!
Non toccare. Agire con
prudenza nel rimuovere la
carta.
CAUTION
The fixing unit is
very hot. To avoide
getting burned, DO
NOT TOUCH.
CAUTION
ATTENTION
VORSICHT
PRECAUCION
ATTENZIONE
CAUTION
The conveyance fixing
unit is heavy. Use care
and draw it out gently;
otherwise you may be
injured.
ENWW Safety labels on the MFPs 19
(Finisher with Cover
Sheet Feeder only)
(Punch Kit)
(Q3634A Finisher only)
(Q3634A Finisher)
CAUTION You may be burned or injured if you touch any area that you are advised by
any caution label to avoid.
CAUTION Do not remove caution labels. If any caution label has come off or is soiled and
therefore the caution cannot be read, contact our service office.
20 Safety ENWW
Scanner section
Laser/scanner assembly
Rear cover
Safety
CAUTION You may be burned or injured if you touch any area that you are advised by
any caution label to avoid.
CAUTION Do not remove caution labels. If any caution label has come off or is soiled and
therefore the caution cannot be read, contact our service office.
ENWW Safety labels on the MFPs 21
WARNING
CAUTION You may be burned or injured if you touch any area that you are advised by
any caution label to avoid.
CAUTION Do not remove caution labels. If any caution label has come off or is soiled and
therefore the caution cannot be read, contact our service office.
22 Safety ENWW
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