HP LaserJet Pro MFP M521 Troubleshooting Manual
LASERJET PRO MFP
Troubleshooting Manual
2
M521
HP LaserJet Pro MFP M521 Printer
Troubleshooting Manual
Copyright and License
© 2012 Copyright Hewlett-Packard
Development Company, L.P.
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®
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trademarks of Adobe Systems Incorporated.
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.
Edition 1, 12/2012
Part number: A8P79-90905
Microsoft®, Windows®, Windows® XP,
and Windows Vista® are U.S. registered
trademarks of Microsoft Corporation.
ENERGY STAR and the ENERGY STAR mark
are registered U.S. marks.
Conventions used in this guide
TIP: Tips provide helpful hints or shortcuts.
NOTE: Notes provide important information to explain a concept or to complete a task.
CAUTION: Cautions indicate procedures that you should follow to avoid losing data or damaging
the product.
WARNING! Warnings alert you to specific procedures that you should follow to avoid personal
injury, catastrophic loss of data, or extensive damage to the product.
ENWW iii
iv Conventions used in this guide ENWW
Table of contents
1 Theory of operation .......................................................................................................... 1
Basic operation ........................................................................................................................ 2
Major systems ........................................................................................................... 2
Product block diagram ............................................................................................... 2
Sequence of operation ............................................................................................... 3
Normal sequence of operation ..................................................................... 3
Formatter-control system ............................................................................................................ 4
Auto on/Auto off mode .............................................................................................. 4
Input/output ............................................................................................................. 5
CPU ........................................................................................................................ 5
Memory ................................................................................................................... 6
Firmware ................................................................................................... 6
Nonvolatile memory ................................................................................... 6
Control panel ........................................................................................................... 6
Engine-control system ................................................................................................................ 7
Motors, fans, clutches, solenoids, switches, and sensors ................................................. 8
DC controller operations .......................................................................................... 15
Fuser-control circuit .................................................................................................. 17
Fuser failure detection ............................................................................... 18
Fuser temperature control .......................................................................... 19
Fuser protective function ............................................................................ 20
Low-voltage power supply ........................................................................................ 21
Overcurrent/overvoltage protection ............................................................ 22
High-voltage power supply ....................................................................................... 23
Laser/scanner system .............................................................................................. 24
Laser failure detection ............................................................................... 25
Image-formation system ........................................................................................................... 26
Electrophotographic process ..................................................................................... 26
Image formation process .......................................................................................... 27
Latent-image formation stage ..................................................................... 28
Primary charging ...................................................................... 28
Laser beam exposure ................................................................. 28
ENWW v
Developing stage ..................................................................................... 29
Toner cartridge ......................................................................... 29
Transfer stage .......................................................................................... 30
Fusing stage ............................................................................. 30
Cleaning stage ......................................................................... 31
Toner detection ....................................................................................................... 32
Pickup, feed, and delivery system ............................................................................................. 33
Paper trays ............................................................................................................. 33
Photo sensors and switches ...................................................................................... 34
Solenoids and clutches ............................................................................................ 36
Tray 1 or Tray 2 .................................................................................................................... 38
Pickup and feed unit ................................................................................................ 38
Cassette paper size detection/cassette paper detection ................................ 38
Cassette pickup ........................................................................................ 38
Tray 1 paper pickup ................................................................................................ 38
Paper pickup and feed ............................................................................................ 39
Jam detection ......................................................................................................... 40
Additional tray ...................................................................................................................... 41
Tray driver PCA ...................................................................................................... 41
Paper pickup and feed ............................................................................................ 42
Paper level and size detection .................................................................................. 43
Jam detection ......................................................................................................... 43
Scanner system ...................................................................................................................... 44
Scanner power-on sequence of events ....................................................................... 44
Copy or scan sequence of events .............................................................................. 45
2 Solve problems ............................................................................................................... 47
Solve problems checklist ......................................................................................................... 48
Menu map ............................................................................................................................ 50
Troubleshooting process .......................................................................................................... 51
Pre-troubleshooting checklist ..................................................................................... 51
Determine the problem source ................................................................................... 52
Troubleshooting flowchart ......................................................................... 52
Power subsystem ..................................................................................................... 53
Power-on checks ...................................................................................... 53
Power-on troubleshooting overview .............................................. 53
Control-panel checks ............................................................................................... 54
Tools for troubleshooting ......................................................................................................... 56
Diagrams ............................................................................................................... 56
Block diagrams ........................................................................................ 56
Location of connectors .............................................................................. 58
vi ENWW
DC controller connections ........................................................... 58
Formatter connections ................................................................ 59
Plug and port locations ............................................................................. 60
Locations of major assemblies .................................................................... 61
General timing charts ............................................................................... 65
Circuit diagrams ...................................................................................... 66
Use HP Device Toolbox (Windows) ........................................................................... 68
Internal print-quality test pages .................................................................................. 69
Clean the paper path ............................................................................... 69
Print the configuration page ....................................................................... 69
Print quality troubleshooting tools .............................................................................. 70
Repetitive defects ruler .............................................................................. 70
Control-panel menus ................................................................................................ 71
Setup Menu ............................................................................................. 71
HP Web Services ...................................................................... 71
Reports menu ............................................................................ 72
Self Diagnostics menu ................................................................ 73
Fax Setup menu ........................................................................ 73
System Setup menu .................................................................... 76
Service menu ............................................................................ 79
Network Setup menu ................................................................. 81
Quick Forms menu .................................................................... 82
Function specific menus ............................................................................. 83
USB Flash Drive ........................................................................ 83
Fax Menu ................................................................................. 83
Copy Menu .............................................................................. 86
Scan Menu ............................................................................... 87
Apps ....................................................................................... 87
Interpret control-panel messages ............................................................................... 88
Control panel message types ..................................................................... 88
Control panel messages ............................................................................ 88
49 Error, Turn off then on ........................................................... 88
50.x Fuser Error ........................................................................ 88
51.XX Error .............................................................................. 88
54.XX Error .............................................................................. 89
55.X Error ................................................................................ 89
57 Fan Error, Turn off then on ..................................................... 89
59.X Error ................................................................................ 90
79 Error Turn off then on ............................................................ 90
Black Cartridge low ................................................................... 90
Black Cartridge very low ............................................................ 90
ENWW vii
Cleaning .................................................................................. 91
Communication Error ................................................................. 91
Device error, press OK .............................................................. 91
Document feeder door is open. Canceled fax. .............................. 92
Door open ................................................................................ 92
Fax is busy. Canceled send. ....................................................... 92
Fax is busy. Redial pending. ....................................................... 92
Fax receive error. ...................................................................... 93
Fax Send error. ......................................................................... 93
Fax storage is full. Canceling the fax receive. ............................... 94
Fax storage is full. Canceling the fax receive. ............................... 94
Fax storage is full. Canceling the fax send. ................................... 94
Genuine HP supply installed ....................................................... 94
Incompatible <color> ................................................................. 95
Install <color> cartridge ............................................................. 95
Invalid driver Press OK .............................................................. 95
Jam in Tray 1, Clear jam and then press OK ................................ 95
Load tray 1 Press OK for available media .................................... 95
Load Tray 1 <TYPE> <SIZE>, Press OK to use available media ....... 96
Load Tray 1, <PLAIN> <SIZE> / Cleaning mode, OK to start ......... 96
Load Tray <X>: [Type], [Size] ..................................................... 96
Manual Duplex Load Tray 1, Press OK ........................................ 96
Manual feed <SIZE> <TYPE>, Press OK to use available media ...... 96
Memory is low. Press OK. .......................................................... 97
Misprint, Press OK ..................................................................... 97
No dial tone. ............................................................................ 97
No fax answer. Canceled send. .................................................. 98
No fax answer. Redial pending. ................................................. 98
No Fax Detected ....................................................................... 98
Print failure, press OK. If error repeats, turn off then on. ................. 99
Remove shipping lock from <color> cartridge ............................... 99
Replace <color> ....................................................................... 99
Unexpected size in tray 1 Load <size> Press OK .......................... 99
Unsupported <color> Press OK to continue ................................. 100
Used <color> cartridge is installed Press OK to continue .............. 100
Event-log messages ............................................................................................... 100
Print the event log ................................................................................... 100
Show an event log ................................................................................. 100
Event log messages ................................................................................ 101
Clear jams .......................................................................................................................... 104
Jam locations ........................................................................................................ 104
viii ENWW
Clear jams in the document feeder .......................................................................... 105
Clear jams in the output area ................................................................................. 107
Clear jams in Tray 1 .............................................................................................. 109
Clear jams in Tray 2 or optional Tray 3 ................................................................... 112
Clear jams in the fuser ........................................................................................... 116
Clear jams in the duplexer ..................................................................................... 118
Paper feeds incorrectly or becomes jammed ............................................................................ 120
The product does not pick up paper ........................................................................ 120
The product picks up multiple sheets of paper ........................................................... 120
The document feeder jams, skews, or picks up multiple sheets of paper ....................... 121
Prevent paper jams from the paper trays .................................................................. 121
Solve image-quality problems ................................................................................................ 122
Image defect examples .......................................................................................... 122
Clean the product ................................................................................................................ 130
Clean the pickup and separation rollers ................................................................... 130
Clean the paper path ............................................................................................ 130
Clean the scanner glass strip and platen .................................................................. 130
Clean the document feeder pickup rollers and separation pad .................................... 131
Clean the touchscreen ........................................................................................... 132
Solve performance problems ................................................................................................. 133
Solve connectivity problems ................................................................................................... 134
Solve USB connection problems .............................................................................. 134
Solve wired network problems ................................................................................ 134
Poor physical connection ......................................................................... 134
The computer is using the incorrect IP address for the product ...................... 135
The computer is unable to communicate with the product ............................ 135
The product is using incorrect link and duplex settings for the network .......... 135
New software programs might be causing compatibility problems ................ 135
The computer or workstation might be set up incorrectly .............................. 135
The product is disabled, or other network settings are incorrect .................... 135
Solve wireless network problems ............................................................................. 136
Wireless connectivity checklist ................................................................. 136
The product does not print after the wireless configuration completes ............ 137
The product does not print, and the computer has a third-party firewall
installed ................................................................................................ 137
The wireless connection does not work after moving the wireless router or
product ................................................................................................. 137
Cannot connect more computers to the wireless product .............................. 137
The wireless product loses communication when connected to a VPN ........... 138
The network does not appear in the wireless networks list ........................... 138
The wireless network is not functioning ...................................................... 138
ENWW ix
Perform a wireless network diagnostic test ................................................. 138
Reduce interference on a wireless network ................................................ 139
Service mode functions ......................................................................................................... 140
Service menu ........................................................................................................ 140
Service menu settings .............................................................................. 140
Restore the factory-set defaults ................................................................. 140
Secondary service menu ........................................................................................ 141
Open the secondary service menu ............................................................ 141
Secondary service menu structure ............................................................. 141
Product resets ....................................................................................................... 142
NVRAM initialization .............................................................................. 142
Super NVRAM initialization ..................................................................... 143
Solve fax problems ............................................................................................................... 144
Checklist for solving fax problems ........................................................................... 144
Perform a fax diagnostic test ................................................................................... 145
Fax trace report .................................................................................................... 146
Fax error report printing ......................................................................................... 146
Print all fax reports ................................................................................. 146
Print individual fax reports ....................................................................... 146
Set the fax error report ............................................................................ 147
Set the fax-error-correction mode ............................................................................. 147
Change the fax speed ........................................................................................... 147
Solve problems sending faxes ................................................................................. 148
An error message displays on the control panel ......................................... 148
The Communication Error message appears ............................... 148
No dial tone. .......................................................................... 149
The Fax is busy. message appears ............................................ 149
The No fax answer. message appears ....................................... 150
Document feeder paper jam ..................................................... 150
The Fax storage is full. message appears ................................... 151
Scanner error ......................................................................... 151
The control panel displays a Ready message with no attempt to send the fax . 151
The control panel displays the message "Storing page 1" and does not
progress beyond that message ................................................................. 152
Faxes can be received, but not sent .......................................................... 152
Product is password protected ................................................................. 152
Unable to use fax functions from the control panel ...................................... 152
Unable to use speed dials ....................................................................... 153
Unable to use group dials ....................................................................... 153
Receive a recorded error message from the telephone company when trying
to send a fax ......................................................................................... 153
x ENWW
Unable to send a fax when a telephone is connected to the product ............. 154
Solve problems receiving faxes ............................................................................... 154
The fax does not respond ........................................................................ 154
The fax has a dedicated telephone line ...................................... 154
An answering machine is connected to the product ..................... 155
The Answer Mode setting is set to the Manual setting ................... 155
Voice mail is available on the fax line ........................................ 156
The product is connected to a DSL telephone service .................... 156
The product uses a fax over IP or VoIP telephone service .............. 156
An error message displays on the control panel ......................................... 157
The No Fax Detected message displays ..................................... 157
The Communication Error message appears ............................... 157
The Fax storage is full. message appears ................................... 158
The Fax is busy. message appears ............................................ 158
A fax is received but does not print .......................................................... 159
The Private Receive feature is on ............................................... 159
Sender receives a busy signal .................................................................. 159
A handset is connected to the product ........................................ 159
A telephone line splitter is being used ........................................ 159
No dial tone .......................................................................................... 159
Cannot send or receive a fax on a PBX line ............................................... 159
Solve general fax problems .................................................................................... 160
Faxes are sending slowly ........................................................................ 160
Fax quality is poor ................................................................................. 161
Fax cuts off or prints on two pages ........................................................... 161
Product updates ................................................................................................................... 163
Manually update the firmware ................................................................................ 163
Set the product to automatically update the firmware ................................................. 163
Appendix A Service and support ..................................................................................... 165
Hewlett-Packard limited warranty statement ............................................................................. 166
HP's Premium Protection Warranty: LaserJet toner cartridge limited warranty statement ................. 168
HP policy on non-HP supplies ................................................................................................ 169
HP anticounterfeit Web site ................................................................................................... 170
Data stored on the toner cartridge .......................................................................................... 171
End User License Agreement .................................................................................................. 172
OpenSSL ............................................................................................................................. 175
Customer self-repair warranty service ..................................................................................... 176
Customer support ................................................................................................................. 177
ENWW xi
Appendix B Product specifications ................................................................................... 179
Physical specifications .......................................................................................................... 180
Power consumption, electrical specifications, and acoustic emissions .......................................... 180
Environmental specifications .................................................................................................. 180
Appendix C Regulatory information ................................................................................. 181
FCC regulations ................................................................................................................... 182
Environmental product stewardship program ........................................................................... 183
Protecting the environment ...................................................................................... 183
Ozone production ................................................................................................. 183
Power consumption ............................................................................................... 183
Toner consumption ................................................................................................ 183
Paper use ............................................................................................................. 183
Plastics ................................................................................................................. 183
HP LaserJet print supplies ....................................................................................... 184
Return and recycling instructions ............................................................................. 184
United States and Puerto Rico .................................................................. 184
Multiple returns (more than one cartridge) .................................. 184
Single returns .......................................................................... 184
Shipping ................................................................................ 184
Non-U.S. returns .................................................................................... 185
Paper .................................................................................................................. 185
Material restrictions ............................................................................................... 185
Disposal of waste equipment by users ...................................................................... 186
Electronic hardware recycling ................................................................................. 186
Chemical substances ............................................................................................. 186
Material Safety Data Sheet (MSDS) ......................................................................... 186
For more information ............................................................................................. 186
Declaration of conformity (dn model) ...................................................................................... 188
Declaration of conformity (dw model) ..................................................................................... 190
Safety statements ................................................................................................................. 192
Laser safety .......................................................................................................... 192
Canadian DOC regulations .................................................................................... 192
VCCI statement (Japan) .......................................................................................... 192
Power cord instructions .......................................................................................... 192
Power cord statement (Japan) ................................................................................. 192
EMC statement (China) .......................................................................................... 193
EMC statement (Korea) .......................................................................................... 193
EMI statement (Taiwan) .......................................................................................... 193
Laser statement for Finland ..................................................................................... 193
GS statement (Germany) ........................................................................................ 195
xii ENWW
Substances Table (China) ....................................................................................... 195
Restriction on Hazardous Substances statement (Turkey) ............................................. 195
Restriction on Hazardous Substances statement (Ukraine) ........................................... 195
Additional statements for telecom (fax) products ....................................................................... 196
EU Statement for Telecom Operation ....................................................................... 196
New Zealand Telecom Statements ........................................................................... 196
Additional FCC statement for telecom products (US) .................................................. 196
Telephone Consumer Protection Act (US) .................................................................. 197
Industry Canada CS-03 requirements ...................................................................... 197
Vietnam Telecom wired/wireless marking for ICTQC Type approved products ............. 198
Additional statements for wireless products .............................................................................. 199
FCC compliance statement—United States ................................................................ 199
Australia statement ................................................................................................ 199
Brazil ANATEL statement ........................................................................................ 199
Canadian statements ............................................................................................. 199
Products with 5 GHz Operation Industry of Canada .................................................. 200
Exposure to Radio Frequency Radiation (Canada) ..................................................... 200
European Union regulatory notice ........................................................................... 200
Notice for use in France ......................................................................................... 200
Notice for use in Russia ......................................................................................... 200
Mexico statement .................................................................................................. 201
Taiwan statement .................................................................................................. 201
Korean statement .................................................................................................. 201
Vietnam Telecom wired/wireless marking for ICTQC Type approved products ............. 201
Index ............................................................................................................................... 203
ENWW xiii
xiv ENWW
1 Theory of operation
Basic operation
●
Formatter-control system
●
Engine-control system
●
Image-formation system
●
Pickup, feed, and delivery system
●
Tray 1 or Tray 2
●
Additional tray
●
Scanner system
●
ENWW 1
Basic operation
Major systems
The product contains the following systems:
Engine-control system
●
Laser/scanner system
●
Image-formation system
●
Paper feed system
●
Option
●
Product block diagram
Figure 1-1 Product block diagram
LASER SCANNER SYSTEM
ENGINE CONTROL SYSTEM
IMAGE-FORMATION SYSTEM
MEDIA FEED SYSTEM
OPTION
2 Chapter 1 Theory of operation ENWW
Sequence of operation
The DC controller in the engine-control system controls the operational sequences of the product. The
following table describes durations and operations for each period of a print operation from when the
product is turned on until the motor stops rotating.
Normal sequence of operation
Table 1-1 Sequence of operation
Name Timing Purpose
WAIT From the time the power switch is turned on or the
door is closed until the product is ready for a print
operation.
STBY (standby) From the end of the WAIT or LSTR period until either
a print command is sent or the power switch is
turned off.
INTR (initial
rotation)
PRINT From the end of the INTR period until the last sheet
LSTR (last
rotation)
From the time the print command is received until the
temperature of the fuser unit reaches its targeted
temperature.
completes the fuser operation.
From the end of the PRINT period until the main
motor stops rotating.
Brings the product to printable condition. The
product performs the following during the operation:
Detects the toner cartridge
●
Maintains the product in printable condition.
Starts up the high-voltage biases, the laser/scanner,
and the fuser unit for printing.
Forms the image on the photosensitive drum based
on the VIDEO signals from the formatter. Transfers
and fuses the toner image to the paper.
Moves the last printed sheet out of the product.
The product enters the INTR period as the LSTR
period is completed, if the formatter sends another
print command.
ENWW
Basic operation
3
Formatter-control system
The formatter is responsible for the following procedures:
Controlling power states of the product
●
Receiving and processing print data from the various product interfaces
●
Monitoring control-panel functions and relaying printer-status information (through the control
●
panel and the network or bidirectional interface)
Developing and coordinating data placement and timing with the DC controller printed circuit
●
assembly (PCA)
Storing font information
●
Communicating with the host computer through the network or the bidirectional interface
●
The formatter receives a print job from the network or bidirectional interface and separates it into
image information and instructions that control the printing process. The DC controller PCA
synchronizes the image-formation system with the paper-input and -output systems, and then signals the
formatter to send the print-image data.
Auto on/Auto off mode
This feature conserves power after the product has been idle for an adjustable period of time by using
two power-saving modes: Sleep mode and Auto off mode.
The product enters Sleep mode after a specified period of idle time. The default idle time to enter Sleep
mode is fifteen minutes. The “Ready” LED on the front of the product remains lit when the product is in
Sleep mode.
The product enters Auto on/Auto off mode after a specified period of idle time. The default idle time to
enter Auto off mode is thirty minutes. The “Ready” LED on the front of the product turns off when the
product is in Auto on/Auto off mode.
The product enters Auto off/Manual on mode after a specified period of time when no wake events are
selected.
Power
consumption
Off Less than 0.5W Off Manually:
Status of
power
button light
How to
enable
mode
press the
power button
Automatically:
sleep timer
expires
How to
disable mode
(put in Ready
state)
Press the power
button
Relative time
to Ready
state
Longest
Controlpanel term
4 Chapter 1 Theory of operation ENWW
Power
consumption
Status of
power
button light
How to
enable
mode
How to
disable mode
(put in Ready
state)
Relative time
to Ready
state
Controlpanel term
Auto off Less than 1W Blinks at 3
second intervals
Sleep Approximately4WBlinks at 3
second intervals
Auto off timer
expires
Auto off timer
expires
Print via USB
port
Open the
cartridge door
Touch the
control panel
touchscreen
Press the power
button
Incoming fax
call
Printing
maintenance
tasks
Receive a fax
Insert paper into
empty ADF tray
Open the
cartridge door
Touch the
control panel
touchscreen
Longer than
Sleep mode
Shortest All events
NOTE: Product error messages override the Sleep message. The product enters sleep mode at the
appropriate time, but the error message continues to appear.
Input/output
The product receives print data primarily from the gigabit LAN interface and fax data from telecom
interface. The product also has a USB 2.0 port for connecting directly to a computer and a USB 2.0
HOST port for connecting to a portable storage device. The M521dw products are capable of
receiving print data from 802.11b/g/n compatible devices.
CPU
The formatter incorporates a 800 MHz processor.
Press the power
button
ENWW
Formatter-control system
5
Memory
The random access memory (RAM) on the formatter PCA contains the page, I/O buffers, and the font
storage area. It stores printing and font information received from the host system, and can also serve
to temporarily store a full page of print-image data before the data is sent to the print engine.
NOTE: If the product encounters a problem when managing available memory, a clearable warning
message appears on the control panel display.
Firmware
The firmware is contained on the formatter. A remote firmware update process is used to overwrite and
update the firmware on the formatter.
Nonvolatile memory
The product uses nonvolatile random access memory (NVRAM) and Flash memory to store device and
user configuration settings. The contents of NVRAM are retained when the product is turned off or
disconnected. The product uses Flash memory to store system firmware and the SmartInstall package.
Control panel
The formatter sends and receives product status and command data to and from the control-panel PCA.
6 Chapter 1 Theory of operation ENWW
Engine-control system
The engine-control system coordinates all product functions, according to commands that the formatter
sends. The engine-control system drives the system, the image formation system, and the pickup/feed/
delivery system.
The engine control system contains the following major components:
DC controller
●
Low-voltage power supply
●
High-voltage power supply
●
Figure 1-2 Engine-control system
Engine control system
Formatter
Laser scanner system
DC controller
Image-formation system
Low-voltage
power supply
High-voltage
power supply
Pickup, feed and delivery
system
Accessory
ENWW
Engine-control system
7
Motors, fans, clutches, solenoids, switches, and sensors
Figure 1-3 Motors
Fuser motor
Main motor
Table 1-2 Motors
Description Components driven Fault detection
Main motor (M8001)
Fuser motor (M8002)
Pickup roller
●
Feed roller
●
Transfer roller
●
Photosensitive drum
●
Developing roller
●
Duplex repickup roller
●
Pressure roller
●
Delivery roller
●
Fuser-delivery roller
●
Duplex-feed roller
●
Yes
Yes
8 Chapter 1 Theory of operation ENWW
Figure 1-4 Fans
Main fan
Sub fan
Table 1-3 Fans
Description Area cooled Type Speed
Main fan (FM1) Inside the product Intake Full
Sub fan (FM2) Inside the product Intake Full
Figure 1-5 Solenoids and clutches (product)
PS4
PS1
M8001
SW501
PS8001
M8002
PS2
PS502
PS225
SL2
PS215
PS3
SL1
PS205
SW235
Table 1-4 Solenoids and clutches (product)
Item Description
SL1 Tray 1 (multipurpose tray) pickup solenoid
ENWW
SL2 Cassette (Tray 2) pickup solenoid
Engine-control system
9
Figure 1-6 Solenoids and clutches (Tray 2 and Tray 3)
M8001
CL1
SL3
PS451
Table 1-5 Solenoids and clutches (Tray 2 and Tray 3)
Item Description
SL3 Paper feeder pickup solenoid
CL1 Paper feeder pickup clutch
NOTE: Tray 2 and Tray 3 are identical 500-sheet input trays.
PS8008
SW461
10 Chapter 1 Theory of operation ENWW
Figure 1-7 Switches (product)
PS4
PS1
M8001
SW501
PS8001
PS2
PS502
M8002
PS225
SL2
PS215
PS3
Table 1-6 Switches (product)
Item Description
SW235 Cassette presence switch
SW501 Cartridge-door switch
SL1
PS205
SW235
ENWW
Engine-control system
11
Figure 1-8 Switches (Tray 2 and Tray 3)
M8001
CL1
SL3
PS451
Table 1-7 Switches (Tray 2 and Tray 3)
Item Description
SW461 Paper feeder cassette presence switch
NOTE: Tray 2 and Tray 3 are identical 500-sheet input trays.
PS8008
SW461
12 Chapter 1 Theory of operation ENWW
Figure 1-9 Sensors
PS4
PS1
PS8001
PS2
PS502
PS225
PS215
PS205
PS3
PS8008
PS451
ENWW
PS8008
PS451
Table 1-8 Sensors
Item Description Item Description
PS1 Face-up sensor PS225 Paper-width sensor
PS2 Fuser delivery sensor PS502 Duplex paper-feed sensor
Engine-control system
13
Table 1-8 Sensors (continued)
Item Description Item Description
PS3 Cassette paper-presence sensor PS451 Paper feeder cassette paper-presence sensor
NOTE: PS451 is used in Tray 3, and Tray 4.
PS4 Face-down tray paper-full sensor PS8001 Rear door sensor
PS205 Tray 1 (multipurpose tray) paper-presence
sensor
PS215 Top-of-Page (TOP) sensor
PS8008 Paper feeder paper-feed sensor
NOTE: PS8008 is used in Tray 2, and Tray 3.
14 Chapter 1 Theory of operation ENWW
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