LASERJET PRO MFP
Troubleshooting Manual
M125-126 M127-128 M127-128
HP LaserJet Pro MFP M125, M126, M127,
M128
Troubleshooting Manual
Copyright and License
Trademark Credits
© 2013 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: CZ183-90907
Edition 1, 9/2013
Microsoft®, Windows®, Windows® XP, and
Windows Vista® are U.S. registered trademarks
of Microsoft Corporation.
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 product systems ........................................................................................................................ 2
Product block diagram ........................................................................................................................ 2
Sequence of operation ........................................................................................................................ 3
Normal sequence of operation ......................................................................................... 3
Formatter-control system ..................................................................................................................................... 4
Sleep mode .......................................................................................................................................... 4
Input/output ........................................................................................................................................ 4
CPU ....................................................................................................................................................... 4
Memory ................................................................................................................................................ 4
Firmware ........................................................................................................................... 5
PJL overview ........................................................................................................................................ 5
LEDM overview .................................................................................................................................... 5
ACL overview ....................................................................................................................................... 5
Control panel ....................................................................................................................................... 5
Engine-control system .......................................................................................................................................... 6
Motors, solenoids, switches, and sensors .......................................................................................... 7
DC controller operations ................................................................................................................... 10
Fuser-control circuit .......................................................................................................................... 11
Fuser failure detection ................................................................................................... 12
Fuser temperature control ............................................................................................. 13
Fuser protective function ............................................................................................... 14
Pressure roller cleaning .................................................................................................. 14
Low-voltage power supply ............................................................................................................... 15
Over-current/over-voltage protection .......................................................................... 17
High-voltage power supply ............................................................................................................... 18
Laser/scanner system ....................................................................................................................... 19
Laser failure detection .................................................................................................... 19
Image-formation system .................................................................................................................................... 21
Electrophotographic process ............................................................................................................ 21
Image formation process .................................................................................................................. 23
ENWW v
Latent-image formation stage ....................................................................................... 24
Primary charging .......................................................................................... 24
Laser beam exposure ................................................................................... 24
Developing stage ............................................................................................................ 25
Toner cartridge ............................................................................................. 25
Transfer stage ................................................................................................................. 26
Fusing stage ................................................................................................. 26
Cleaning stage .............................................................................................. 27
Pickup, feed, and delivery system ...................................................................................................................... 28
Photo sensors, motor, and solenoid ................................................................................................. 29
Jam detection .................................................................................................................................... 30
Scanner system ................................................................................................................................................... 31
Electrical system ............................................................................................................................... 31
Scanner power-on sequence of events .......................................................................... 31
Copy or scan-to-computer sequence of events ............................................................. 32
Document feeder functions and operation ......................................................................................................... 33
Document feeder operation .............................................................................................................. 33
Document feeder paper path and document feeder sensors .......................................................... 33
Document feeder jam detection ....................................................................................................... 34
Fax functions and operation ............................................................................................................................... 35
Computer and network security features ........................................................................................ 35
PSTN operation ................................................................................................................................. 35
The fax subsystem ............................................................................................................................ 35
Fax card in the fax subsystem .......................................................................................................... 35
Safety isolation ............................................................................................................... 36
Safety-protection circuitry ............................................................................................. 36
Data path ......................................................................................................................... 36
Hook state ....................................................................................................................... 36
Downstream device detection ........................................................................................ 37
Hook switch control ........................................................................................................ 37
Ring detect ...................................................................................................................... 37
Line current control ........................................................................................................ 37
Billing- (metering-) tone filters ...................................................................................... 37
Fax page storage in flash memory ................................................................................................... 37
Stored fax pages ............................................................................................................. 38
Advantages of flash memory storage ............................................................................ 38
2 Solve problems ........................................................................................................................................... 39
Solve problems checklist ..................................................................................................................................... 40
Troubleshooting process .................................................................................................................................... 42
Determine the problem source ......................................................................................................... 42
vi ENWW
Power subsystem .............................................................................................................................. 43
Power-on checks ............................................................................................................ 43
Tools for troubleshooting ................................................................................................................................... 44
Component diagnostics .................................................................................................................... 44
Engine diagnostics .......................................................................................................... 44
Engine-test page .......................................................................................... 44
Drum rotation functional check .................................................................. 44
Half self-test functional check ..................................................................... 44
Diagrams ........................................................................................................................................... 46
Plug/jack locations ......................................................................................................... 46
Location of connectors ................................................................................................... 47
Locations of major components ..................................................................................... 48
General timing chart ....................................................................................................... 53
General circuit diagram .................................................................................................. 54
Internal print-quality test pages ...................................................................................................... 55
Clean the paper path ....................................................................................................... 55
Print the configuration page .......................................................................................... 55
Print-quality troubleshooting tools ................................................................................................. 57
Repetitive defect ruler .................................................................................................... 57
Control panel menus ......................................................................................................................... 58
Touchscreen control panel ............................................................................................. 58
Setup menu .................................................................................................. 58
Fax Menu ....................................................................................................... 65
Copy Menu .................................................................................................... 67
LCD control panel ............................................................................................................ 69
Setup menu .................................................................................................. 69
Copy menu .................................................................................................... 77
Interpret control-panel messages .................................................................................................... 79
Control-panel message types ........................................................................................ 79
Control-panel messages ................................................................................................ 79
Clear jams ............................................................................................................................................................ 86
Solve paper feed or jam problems .................................................................................................... 86
The product does not pick up paper ............................................................................... 86
The product picks up multiple sheets of paper .............................................................. 86
Frequent or recurring paper jams .................................................................................. 86
Prevent paper jams ......................................................................................................... 87
Clear jams from the input tray .......................................................................................................... 88
Clear jams in the toner-cartridge area ............................................................................................. 91
Clear jams in the output bin .............................................................................................................. 94
Clear jams in the document feeder ................................................................................................... 97
Solve paper-handling problems .......................................................................................................................... 99
ENWW vii
Solve image-quality problems .......................................................................................................................... 100
General print-quality issues ........................................................................................................... 100
Copy print-quality problems ........................................................................................................... 104
Scan-quality problems .................................................................................................................... 105
Prevent scan-quality problems .................................................................................... 105
Solve scan-quality problems ........................................................................................ 105
Clean the product .............................................................................................................................................. 106
Clean the pickup roller and separation pad .................................................................................... 106
Clean the paper path ....................................................................................................................... 112
Clean the toner-cartridge area ....................................................................................................... 113
Clean the exterior ............................................................................................................................ 116
Check the scanner glass for dirt and smudges ............................................................................... 117
Clean the pickup rollers and separation pad in the document feeder ........................................... 118
Solve performance problems ............................................................................................................................ 119
Solve connectivity problems ............................................................................................................................. 120
Solve direct-connect problems ...................................................................................................... 120
Solve wired network problems ....................................................................................................... 120
Poor physical connection ............................................................................................. 120
The computer is using the incorrect IP address for the product ................................. 120
The computer is unable to communicate with the product ........................................ 121
The product is using incorrect link and duplex settings for the network ................... 121
New software programs might be causing compatibility problems ........................... 121
The computer or workstation might be set up incorrectly .......................................... 121
The product is disabled, or other network settings are incorrect ............................... 121
Solve wireless network problems .................................................................................................. 122
Wireless connectivity checklist .................................................................................... 122
The product does not print after the wireless configuration completes .................... 123
The product does not print, and the computer has a third-party firewall installed ... 123
The wireless connection does not work after moving the wireless router or
product .......................................................................................................................... 123
Cannot connect more computers to the wireless product .......................................... 123
The wireless product loses communication when connected to a VPN ...................... 123
The network does not appear in the wireless networks list ....................................... 123
The wireless network is not functioning ...................................................................... 124
Perform a wireless network diagnostic test ................................................................ 124
Reduce interference on a wireless network ................................................................ 124
Service mode functions ..................................................................................................................................... 126
Secondary service menu ................................................................................................................. 126
Open the secondary service menu ............................................................................... 126
Secondary service menu structure .............................................................................. 126
Product resets ................................................................................................................................. 128
viii ENWW
Restore factory settings ............................................................................................... 128
NVRAM initialization ..................................................................................................... 128
Solve fax problems ............................................................................................................................................ 129
Check the hardware setup .............................................................................................................. 129
Faxes are sending slowly ................................................................................................................ 130
Fax quality is poor ........................................................................................................................... 131
Fax cuts off or prints on two pages ................................................................................................ 132
Product updates ................................................................................................................................................ 133
Appendix A Service and support .................................................................................................................... 135
Hewlett-Packard limited warranty statement ................................................................................................. 136
HP's Premium Protection Warranty: LaserJet toner cartridge limited warranty statement ........................... 137
HP policy on non-HP supplies ........................................................................................................................... 138
HP anticounterfeit Web site .............................................................................................................................. 139
Data stored on the toner cartridge ................................................................................................................... 140
End User License Agreement ............................................................................................................................ 141
OpenSSL ............................................................................................................................................................. 143
Customer self-repair warranty service ............................................................................................................. 144
Customer support .............................................................................................................................................. 145
Appendix B Product specifications ................................................................................................................. 147
Physical specifications ...................................................................................................................................... 148
Power consumption, electrical specifications, and acoustic emissions .......................................................... 148
Environmental specifications ............................................................................................................................ 148
Appendix C Regulatory information ............................................................................................................... 149
FCC regulations .................................................................................................................................................. 150
Environmental product stewardship program ................................................................................................. 151
Protecting the environment ........................................................................................................... 151
Ozone production ............................................................................................................................ 151
Power consumption ........................................................................................................................ 151
Toner consumption ......................................................................................................................... 151
Paper use ......................................................................................................................................... 151
Plastics ............................................................................................................................................ 151
HP LaserJet print supplies .............................................................................................................. 152
Return and recycling instructions ................................................................................................... 152
United States and Puerto Rico ...................................................................................... 152
Multiple returns (more than one cartridge) ............................................... 152
Single returns ............................................................................................. 152
Shipping ...................................................................................................... 152
ENWW ix
Non-U.S. returns ........................................................................................................... 153
Paper ............................................................................................................................................... 153
Material restrictions (LaserJet Pro MFP M125-M126 series) ......................................................... 153
Material restrictions (LaserJet Pro MFP M127-M128 series) ......................................................... 153
Disposal of waste equipment by users ........................................................................................... 154
Electronic hardware recycling ........................................................................................................ 154
Chemical substances ....................................................................................................................... 154
Material Safety Data Sheet (MSDS) ................................................................................................ 154
EPEAT .............................................................................................................................................. 154
For more information ...................................................................................................................... 154
Declaration of conformity (M125a-M125ra) .................................................................................................... 156
Declaration of conformity (M125nw-M126nw) ................................................................................................ 158
Declaration of conformity (M127fn-M128fn) ................................................................................................... 160
Declaration of conformity (M127fp-M128fp) ................................................................................................... 162
Declaration of conformity (M127fw-M128fw) ................................................................................................. 164
Safety statements ............................................................................................................................................. 166
Laser safety ..................................................................................................................................... 166
Canadian DOC regulations .............................................................................................................. 166
VCCI statement (Japan) ................................................................................................................... 166
Power cord instructions .................................................................................................................. 166
Power cord statement (Japan) ....................................................................................................... 166
EMC statement (Korea) ................................................................................................................... 167
Laser statement for Finland ........................................................................................................... 167
GS statement (Germany) ................................................................................................................ 168
Substances Table (China) ................................................................................................................ 168
SEPA Ecolabel User Information (China) ........................................................................................ 168
Restriction on Hazardous Substances statement (Turkey) ........................................................... 169
Restriction on Hazardous Substances statement (Ukraine) .......................................................... 169
Eurasian Conformity (Belarus, Kazakhstan, Russia) ...................................................................... 169
Additional statements for telecom (fax) products ........................................................................................... 170
EU Statement for Telecom Operation ............................................................................................ 170
New Zealand Telecom Statements ................................................................................................. 170
Additional FCC statement for telecom products (US) .................................................................... 170
Telephone Consumer Protection Act (US) ...................................................................................... 171
Industry Canada CS-03 requirements ............................................................................................ 171
Vietnam Telecom wired/wireless marking for ICTQC Type approved products ............................ 172
Additional statements for wireless products ................................................................................................... 173
FCC compliance statement—United States ................................................................................... 173
Australia statement ........................................................................................................................ 173
Brazil ANATEL statement ................................................................................................................ 173
Canadian statements ...................................................................................................................... 173
x ENWW
Products with 5 GHz Operation Industry of Canada ....................................................................... 173
Exposure to Radio Frequency Radiation (Canada) ......................................................................... 173
European Union regulatory notice .................................................................................................. 174
Notice for use in France .................................................................................................................. 174
Notice for use in Russia ................................................................................................................... 174
Mexico statement ........................................................................................................................... 174
Taiwan statement ........................................................................................................................... 175
Korean statement ........................................................................................................................... 175
Vietnam Telecom wired/wireless marking for ICTQC Type approved products ............................ 172
Index ........................................................................................................................................................... 177
ENWW xi
xii ENWW
List of tables
Table 1-1 Sequence of operation ......................................................................................................................................... 3
Table 1-2 Motors ................................................................................................................................................................... 7
Table 1-3 Solenoids .............................................................................................................................................................. 8
Table 1-4 Switches ............................................................................................................................................................... 8
Table 1-5 Sensors ................................................................................................................................................................. 9
Table 1-6 DC controller controlled components ............................................................................................................... 10
Table 1-7 DC power supply specifications ......................................................................................................................... 16
Table 1-8 Photo sensors, motor, and solenoid .................................................................................................................. 29
Table 1-9 Document feeder sensors .................................................................................................................................. 33
Table 2-1 Basic problem solving ........................................................................................................................................ 40
Table 2-2 HP Web Services menu (touchscreen control panel) ........................................................................................ 58
Table 2-3 Reports menu (touchscreen control panel) ....................................................................................................... 59
Table 2-4 Self Diagnostics menu (touchscreen control panel) ......................................................................................... 59
Table 2-5 Fax Setup menu (touchscreen control panel) ................................................................................................... 59
Table 2-6 System Setup menu (touchscreen control panel) ............................................................................................. 62
Table 2-7 Service menu (touchscreen control panel) ........................................................................................................ 64
Table 2-8 Network Setup menu (touchscreen control panel) ........................................................................................... 65
Table 2-9 Fax Menu (touchscreen control panel) .............................................................................................................. 65
Table 2-10 Copy Menu (touchscreen control panel) .......................................................................................................... 67
Table 2-11 HP Web Services menu (LCD control panel) .................................................................................................... 69
Table 2-12 PhoneBook Number menu (LCD control panel) ............................................................................................... 69
Table 2-13 Fax Functions menu (LCD control panel) ......................................................................................................... 70
Table 2-14 Reports menu (LCD control panel) .................................................................................................................. 70
Table 2-15 Fax Setup menu (LCD control panel) ............................................................................................................... 71
Table 2-16 System Setup menu (LCD control panel) ......................................................................................................... 74
Table 2-17 Service menu (LCD control panel) .................................................................................................................... 76
Table 2-18 Network Setup menu (LCD control panel) ....................................................................................................... 76
Table 2-19 Copy menu (LCD control panel) ....................................................................................................................... 77
Table 2-20 Control-panel messages .................................................................................................................................. 79
Table 2-21 General print-quality issues .......................................................................................................................... 100
Table 2-22 Copy print-quality problems ......................................................................................................................... 104
Table 2-23 Scan-quality problems .................................................................................................................................. 105
ENWW xiii
Table 2-24 Secondary service menu ................................................................................................................................ 126
Table B-1 Physical specifications ..................................................................................................................................... 148
Table B-2 Product dimensions with input tray opened ................................................................................................... 148
Table B-3 Operating-environment specifications ........................................................................................................... 148
xiv ENWW
List of figures
Figure 1-1 Product block diagram ........................................................................................................................................ 2
Figure 1-2 Engine-control system ........................................................................................................................................ 6
Figure 1-3 Motors ................................................................................................................................................................. 7
Figure 1-4 Solenoids ............................................................................................................................................................. 8
Figure 1-5 Switches .............................................................................................................................................................. 8
Figure 1-6 Sensors ................................................................................................................................................................ 9
Figure 1-7 DC controller block diagram ............................................................................................................................. 10
Figure 1-8 Fuser control circuit .......................................................................................................................................... 11
Figure 1-9 Fuser-heater control circuit .............................................................................................................................. 13
Figure 1-10 Low-voltage power supply (LVPS) ................................................................................................................. 15
Figure 1-11 High-voltage power supply ............................................................................................................................ 18
Figure 1-12 Laser/scanner system .................................................................................................................................... 19
Figure 1-13 Electrophotographic process block diagram (1 of 2) ..................................................................................... 21
Figure 1-14 Electrophotographic process block diagram (2 of 2) ..................................................................................... 22
Figure 1-15 Image formation process ............................................................................................................................... 23
Figure 1-16 Primary charging ............................................................................................................................................ 24
Figure 1-17 Laser beam exposure ..................................................................................................................................... 24
Figure 1-18 Toner cartridge ............................................................................................................................................... 25
Figure 1-19 Transfer ........................................................................................................................................................... 26
Figure 1-20 Separation ....................................................................................................................................................... 26
Figure 1-21 Fusing .............................................................................................................................................................. 27
Figure 1-22 Drum cleaning ................................................................................................................................................. 27
Figure 1-23 Pickup, feed, and delivery system block diagram ......................................................................................... 28
Figure 1-24 Photo sensors, motor, and solenoid .............................................................................................................. 29
Figure 1-25 Document feeder paper path and document feeder sensors ........................................................................ 33
Figure 2-1 Engine controller PCA connectors .................................................................................................................... 47
Figure 2-2 Main PCAs .......................................................................................................................................................... 48
Figure 2-3 Motor ................................................................................................................................................................. 49
Figure 2-4 Solenoid ............................................................................................................................................................ 50
Figure 2-5 Sensors .............................................................................................................................................................. 51
Figure 2-6 Cross section view ............................................................................................................................................. 52
Figure 2-7 General timing diagram .................................................................................................................................... 53
ENWW xv
Figure 2-8 Circuit diagram .................................................................................................................................................. 54
xvi ENWW
1 Theory of operation
●
Basic operation
●
Formatter-control system
●
Engine-control system
●
Image-formation system
●
Pickup, feed, and delivery system
●
Scanner system
●
Document feeder functions and operation
●
Fax functions and operation
ENWW 1
Basic operation
Major product systems
The product contains the following major systems:
●
Engine-control system
●
Laser/scanner system
●
Image-formation system
●
Pickup-and-feed system
●
Document feeder system (not shown)
Product block diagram
Figure 1-1 Product block diagram
LASER/SCANNER SYSTEM
ENGINE CONTROL
SYSTEM
IMAGE-FORMATION SYSTEM
PICKUP-AND-FEED SYSTEM
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 table
below describes durations and operations for each period of a print operation from when the product is
turned on until the motor stops rotating.
NOTE: This sequence of operations is for the product base and does not include the document feeder.
Normal sequence of operation
Table 1-1 Sequence of operation
Name Timing Purpose
WAIT From the time the power switch is turned on, the door is
closed or the product exits Sleep mode until the product
gets ready for a print operation.
STBY (standby) From the end of the WAIT or LSTR period until either a
INTR (initial
rotation)
PRINT From the end of the INTR period until the last sheet
LSTR (last
rotation)
print command is sent or the power switch is turned off.
From the time a print command is received until the
paper is picked up.
completes the fuser operation.
From the end of the PRINT period until the main motor
stops rotating.
Brings the product to ready state. The product
performs the following during the operations:
●
Detects the toner cartridge
●
Heats the fuser film in the fuser
●
Rotates, and the stops, the main motor
Maintains the product in printable condition. The
product performs the following during the operation:
The product performs the following during the
operations:
●
Drives the main motor
●
Activates the high-voltage power supply
●
Activates the laser/scanner
●
Warms the fuser heater
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 performs the following during the operations:
●
Stops the main motor
●
Deactivates the high-voltage power supply
●
Deactivates the laser/scanner
●
Deactivates the fuser heater
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 sleep mode
●
Receiving and processing print data from the various product interfaces
●
Monitoring control-panel functions and relaying product-status information (through the control panel
and the network or bidirectional interface)
●
Developing and coordinating data placement and timing with the DC controller 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 imageformation system with the paper-input and -output systems, and then signals the formatter to send the
print-image data.
Sleep mode
After a user-specified time, the Sleep mode feature automatically conserves electricity by substantially
reducing power consumption when the product is not printing. After a user-specified time, the product
automatically reduces its power consumption (Sleep mode). The product returns to the ready state when a
button is pressed, a print job is received, or a door is opened. When the product is in Sleep mode, all of the
control-panel LEDs and the power button backlight LED is blinking or on.
NOTE: Although the product lights are off in Sleep mode, the product functions normally when it receives a
print job.
Input/output
The product receives print data primarily from the following:
●
Hi-Speed USB 2.0 port
●
10/100 Base-T network port.
●
Fax
●
Wireless
CPU
The formatter incorporates a 600 MHz processor.
Memory
The random access memory (RAM) on the formatter PCA contains the page and the I/O buffers. RAM stores
printing 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.
4 Chapter 1 Theory of operation ENWW
Firmware
●
The product has 128 MB of Synchronous DRAM, which is used for run-time firmware imaging and print,
fax, scan and copy job information during printing.
PJL overview
The printer job language (PJL) is an integral part of configuration, in addition to the standard printer
command language (PCL). With standard cabling, the product can use PJL to perform a variety of functions
such as these:
●
Two-way communication with the host computer through a network connection or a USB connection.
The product can inform the host about such things as the control-panel settings, and the control-panel
settings can be changed from the host.
●
Dynamic I/O switching. The product uses this switching to be configured with a host on each I/O. The
product can receive data from more than one I/O simultaneously, until the I/O buffer is full. This can
occur even when the product is offline.
●
Context-sensitive switching. The product can automatically recognize the personality (PS or PCL) of
each job and configure itself to serve that personality.
●
Isolation of print environment settings from one print job to the next. For example, if a print job is sent
to the product in landscape mode, the subsequent print jobs print in landscape mode only if they are
formatted for landscape printing.
LEDM overview
The low-end data model (LEDM) provides one consistent data representation method and defines the
dynamic and capabilities tickets shared between clients and devices, as well as the access protocol, event,
security, and discovery methods.
ACL overview
The advanced control language (ACL) is a language that supports product control and firmware downloads in
printers that support both PJL/PCL and host-based printing. Each sequence of ACL commands must be
preceded by a unified exit command (UEL) and an @PJL ENTER LANGUAGE=ACL command. The ACL sequence
is always followed by a UEL. Any number of commands can be placed between the UELs. The only exception
to these rules is the download command. If a firmware download is done, the download command must be
the last command in the sequence. It will not be followed by a UEL.
The firmware searches for the UEL sequence when parsing commands. However, while downloading binary
data such as host-based code or NVRAM data the firmware suspends UEL parsing. To handle hosts that
“disappear” during binary sequences, the firmware times out all ACL command sessions. If a timeout occurs
during a non-download command sequence, it is treated as the receipt of a UEL. If a timeout occurs during
firmware download the product resets.
Control panel
The formatter sends and receives product status and command data to and from the control-panel PCA.
ENWW Formatter-control system 5
Engine-control system
The engine-control system coordinates all product functions, according to commands that the formatter
sends. The engine-control system drives the laser/scanner system, the image-formation system, and the
pickup/feed/delivery system.
The engine control system contains the following major components:
●
Engine-control unit (ECU)
◦
DC controller
◦
Low-voltage power supply
●
High-voltage power supply
●
Fuser control
Figure 1-2 Engine-control system
ENGINE CONTROL SYSTEM
DC controller
LASER/SCANNER SYSTEM
Formatter
Low-voltage power supply
IMAGE-FORMATION SYSTEM
High-voltage power supply
MEDIA-FEED SYSTEM
Fuser control
6 Chapter 1 Theory of operation ENWW
Motors, solenoids, switches, and sensors
Figure 1-3 Motors
Table 1-2 Motors
Item Description Components driven
1
M1 Main motor
●
Pickup roller
●
Feed roller
●
Photosensitive drum
●
Developing roller
●
Pressure roller
●
Delivery roller
ENWW Engine-control system 7
Figure 1-4 Solenoids
1
Table 1-3 Solenoids
Item Description
SL1 Pickup solenoid
Figure 1-5 Switches
Table 1-4 Switches
Item Description
SW501 Cartridge-door switch
SW1100 Power switch; not shown (the power switch is part of the control-
panel assembly)
8 Chapter 1 Theory of operation ENWW
Figure 1-6 Sensors
4
3
2
Table 1-5 Sensors
Item Sensor Description
1 PS901 Main-motor rotation-number sensor; not shown
2 PS751 Top-of-Page (TOP) sensor
1
3 PS701 Fuser delivery sensor
4 PS702 Paper-width sensor
ENWW Engine-control system 9
DC controller operations
The DC controller controls the operational sequences of the product systems.
Figure 1-7 DC controller block diagram
AC input
Engine controller
Fuser unit
Transfer roller
Cartridge
Formatter
Low-voltage
power supply
High-voltage
power supply
Motor
Solenoid
Photointerrupter
DC controller
Switch
Laser scanner
Operation panel
Table 1-6 DC controller controlled components
Component Designator Description
Motor M1 Main motor
Solenoid SL1 Pickup solenoid
Photointerrupter PS701 Fuser delivery sensor
PS702 Media-width sensor
PS751 Top-of-Page (TOP) sensor
PS901 Main-motor rotation-number sensor
Switch SW501 Cartridge-door switch
SW1100 Power switch
10 Chapter 1 Theory of operation ENWW
Fuser-control circuit
The fuser-control circuit monitors and controls the temperature in the fuser. The product uses on-demand
fusing. The fuser-control circuit consists of the following major components:
●
Fuser heater (H1); heats the fusing film
●
Thermistor (TH1); detects the fuser temperature (contact type)
●
Thermoswitch (TP1); prevents abnormal temperature rise in the fuser (contact type)
Figure 1-8 Fuser control circuit
Fuser film
TH1
TP1
H1
FUSER HEATER CONTROL signal
Fuser heater control
circuit
Fuser control
Pressure roller
FUSER TEMPERATURE signal
Fuser heater safety
circuit
DC controller
Engine controller
ENWW Engine-control system 11
Fuser failure detection
The DC controller determines a fuser unit failure, releases the relay to interrupt power supply to the fuser
heater, and notifies the formatter of a failure state when it encounters the following conditions:
●
Start up failure
◦
If the main thermistor does not detect a specified temperature during the start up process of the
heater in the wait period.
◦
If the main thermistor does not detect a specified temperature during the heater temperature
control in the initial rotation period.
●
Abnormal low temperature
◦
If the main thermistor detects an abnormal low temperature of the fuser unit during the printing
operation.
●
Abnormal high temperature
◦
If the main thermistor detects an abnormal high temperature of the fuser unit.
●
Frequency detection circuit failure
◦
If a specified frequency of the FREQUENCY signal is not detected within a specified period after the
product is turned on.
12 Chapter 1 Theory of operation ENWW
Fuser temperature control
The fuser temperature control maintains the temperature of the fuser heater at its targeted temperature.
The DC controller monitors the FIXING TEMPERATURE (FSRTH) signals and sends the FIXING HEATER CONTROL
(FSRD) signal according to the detected temperature. The fuser heater control circuit controls the fuser
heater depending on the signal so that the heater remains at the targeted temperature.
Figure 1-9 Fuser-heater control circuit
AC input
Engine controller
RL101
Fuser heater
control circuit
TP1
Frequency detection
circuit
(220-240V model only)
Relay control
circuit
TH1
Fixing control
Fuser heater
safety circuit
DC controller
FREQSNS
RLYD
FSRD
FSRTH
H1
Fuser film unit
Pressure roller
Fuser unit
ENWW Engine-control system 13
Fuser protective function
The protective function detects an abnormal temperature rise of the fuser unit and interrupts power supply
to the fuser heater.
The following three protective components prevent an abnormal temperature rise of the fuser heater:
●
DC controller
◦
The DC controller interrupts power supply to the fuser heater when it detects an abnormal
temperature of the fuser heater.
●
Fuser heater safety circuit
◦
The fuser heater safety circuit interrupts power supply to the fuser heater when the detected
temperature of the main thermistor is abnormal.
●
Thermal fuse
◦
The contact of the thermal fuse is broken to interrupt power supply to the fuser heater when the
thermal fuse detects an abnormal temperature of the fuser heater.
Pressure roller cleaning
The pressure roller cleaning process is initiated by the formatter. The process removes toner that has
accumulated on the pressure roller by transferring it to a sheet of blank paper.
NOTE: Use plain paper, with a weight of 75 g/m2 (20 lb), for the pressure roller cleaning.
●
The product feeds a sheet of paper after receiving the cleaning command from the formatter.
●
Main motor rotation is stopped when the trailing edge of the paper passes through the transfer roller.
●
The main motor rotation is repeatedly started and then stopped. The fuser heater is turned on and then
off at the same interval as main motor rotation.
●
Toner adhered to the pressure roller is fused to the paper.
●
The paper is ejected from the product.
14 Chapter 1 Theory of operation ENWW
Low-voltage power supply
The low-voltage power supply (LVPS) converts AC input voltage to DC voltage.
WARNING! The product power switch only interrupts DC voltage from the LVPS. The AC voltage is present in
the product when the power cord is plugged into a power receptacle and the power switch is in the off
position. Unplug the product power cord before servicing the product.
Figure 1-10 Low-voltage power supply (LVPS)
AC input
Fuse
(FU101)
Engine controller
Low-voltage power supply
DC controller
Fuser
Rectifying
circuit
24V
generation
circuit
Protection
circuit
24V
Frequency
detection circuit
(220-240V model)
Interlock switch
(SW501)
24V output
switch circuit
3.3V
generation
circuit
24U
3.3V output
switch circuit
High-voltage
power supply
24P
24F
3.3V
5V
generation
circuit
FREQSNS
5R
/LVM
BSTSIG
/3.3UON
/3.3FON
3.3F
Power switch
Control panel
3.3U
Formatter
/SWON
ENWW Engine-control system 15
Table 1-7 DC power supply specifications
Main DC voltage Sub-voltage Behavior
+24V 24V Constantly supplied
24P Supplied when the power switch is turned ON
Stopped during standby period or Sleep mode
24F Supplied when the power switch is turned ON
Stopped during Sleep mode
24U Interrupted when the cartridge door is open
+5V 5R Supplied when the power switch is turned ON
Stopped during standby period or Sleep mode
+3.3V 3.3V Constantly supplied
3.3U Supplied when the power switch is turned ON
Stopped during standby period or Sleep mode
3.3F Supplied when the power switch is turned ON
16 Chapter 1 Theory of operation ENWW
Over-current/over-voltage protection
The low-voltage power supply automatically stops supplying the DC voltage to the printer components
whenever it detects excessive current or abnormal voltage.
The low-voltage power supply has a protective circuit against over-current and over-voltage to prevent
failures in the power supply circuit.
If DC voltage is not being supplied from the low-voltage power supply, the protective function might be
running. In this case, turn the power switch off and unplug the power cord. Do not turn the power switch on
until the root cause is found and corrected.
WARNING! If you believe the over-current or over-voltage protection circuits have been activated, do not
plug in the product power cord or turn on the product power until the cause of the failure is found and
corrected.
The DC controller notifies the formatter of a low-voltage power supply failure when the protective function is
activated.
In addition, the low-voltage power supply has one fuse (FU101) to protect against over-current. If excessive
current flows into the AC line, the fuse blows to stop AC power.
ENWW Engine-control system 17
High-voltage power supply
The high-voltage power supply (HVPS) applies biases to the following components:
●
Primary charging roller
●
Developing roller
●
Transfer roller
Figure 1-11 High-voltage power supply
Engine controller
DC controller
High-voltage power supply
Primary
charging bias
circuit
Developing
bias circuit
Transfer bias
circuit
To primary charging roller
To developing roller
Cartridge
Photosensitive drum
Transfer roller
18 Chapter 1 Theory of operation ENWW
Laser/scanner system
The laser/scanner system receives VIDEO signals from the ECU and formatter and converts the signals into
latent images on the photosensitive drum.
The main components of the laser/scanner are the laser unit and the scanner motor unit. The DC controller
sends signals to the laser/scanner to control the functions of these components.
Figure 1-12 Laser/scanner system
Laser unit
BD sensor
Photosensitive drum
Scanning mirror
Scanner motor unit
BDI signal
VIDEO signal
LASER CONTROL signal
SCANNER MOTOR CONTROL signal
DC controlle r
Engine controller
Formatter
Laser failure detection
The DC controller determines an optical unit failure and notifies the formatter, if the laser/scanner
encounters the following conditions:
ENWW Engine-control system 19
●
The scanner motor does not reach a specified rotation within a specified period of the scanner motor
start up.
●
The rotation of the scanner motor is out of specified range for a specified period during the scanner
motor drive.
●
The BD interval is out of a specified value during a print operation.
20 Chapter 1 Theory of operation ENWW
Image-formation system
Electrophotographic process
The electrophotographic process forms an image on the paper. Following are the major components used in
the process:
●
Toner cartridge
●
Transfer roller
●
Fuser
●
Laser/scanner
●
High-voltage power supply
The DC controller uses the laser/scanner and HVPS to form the toner image on the photosensitive drum. The
image is transferred to the paper and then fused onto the paper.
Figure 1-13 Electrophotographic process block diagram (1 of 2)
Transfer roller
Cartridge
Laser scanner
High-voltage power supply
DC controller
Engine controller
The DC controller rotates the main motor to drive the following components:
●
Photosensitive drum
●
Developing drum
●
Primary charging roller (follows the rotation of the photosensitive drum)
●
Transfer roller (follows the rotation of the photosensitive drum)
ENWW Image-formation system 21
Figure 1-14 Electrophotographic process block diagram (2 of 2)
Primary charging roller
Developing roller
Main motor
Transfer roller
Cartridge
Photosensitive drum
DC controller
Engine controller
22 Chapter 1 Theory of operation ENWW
Image formation process
Each of the following process function independently and must be coordinated with the other product
processes. Image formation consists of the following processes:
●
Latent-image formation block
◦
Step 1: Primary charging
◦
Step 2: Laser-beam exposure
●
Developing block
◦
Step 3: Developing
●
Transfer block
◦
Step 4: Transfer
◦
Step 5: Separation
●
Fusing block
◦
Step 6: Fusing
●
Drum cleaning block
◦
Step 7: Drum cleaning
Figure 1-15 Image formation process
ENWW Image-formation system 23
Latent-image formation stage
During the latent-image formation stage, the laser/scanner forms an invisible image on the photosensitive
drum in the toner cartridge.
Primary charging
Step 1: DC and AC biases are applied to the primary charging roller, which transfers a uniform negative
potential to the photosensitive drum.
Figure 1-16 Primary charging
Primary charging roller
Photosensitive drum
Laser beam exposure
DC bias
Step 2: The laser beam scans the photosensitive drum to neutralize negative charges on parts of the drum
surface. An electrostatic latent image is formed on the drum where negative charges were neutralized.
Figure 1-17 Laser beam exposure
Laser beam
Unexposed area Exposed area
24 Chapter 1 Theory of operation ENWW
Developing stage
Toner cartridge
Step 3: In the toner cartridge, the developing cylinder transfers toner onto the electrostatic latent image on
the photosensitive drum.
Figure 1-18 Toner cartridge
Blade
Developing cylinder
Exposed area
Unexposed area
Unexposed area
Exposed area
Photosensitive drum
AC bias
DC bias
Toner acquires a negative charge from the friction that occurs when the developing roller rotates against the
developing blade. The developing bias is applied to the developing roller to make a potential difference
between the developing roller and the photosensitive drum. The negatively charged toner is attracted to the
latent image on the photosensitive drum because the drum surface has a higher potential.
ENWW Image-formation system 25
Transfer stage
Step 4: The transfer charging roller, to which a DC positive bias is applied, imparts a positive charge on the
paper. When the page comes in contact with the photosensitive drum, the toner is transferred to the paper.
Figure 1-19 Transfer
Transfer roller
Step 5: The elasticity of the paper causes its separation from the photosensitive drum. A static charge
eliminator aids separation by weakening any electrostatic adhesion.
Figure 1-20 Separation
Photosensitive
drum
Media
DC bias
Static charge eliminator
Fusing stage
Step 6: The DC negative bias applied to the fusing film strengthens the holding force of the toner on the
paper and prevents the toner from scattering.
Photosensitive
drum
Media
Transfer roller
26 Chapter 1 Theory of operation ENWW
The product uses an on-demand fuser method. The toner image is permanently affixed to the paper by heat
and pressure.
Figure 1-21 Fusing
Cleaning stage
Step 7: The cleaning blade scrapes the residual toner off of the photosensitive drum and deposits it into the
waste toner case.
Figure 1-22 Drum cleaning
Fuser heater
Fuser film
Toner
Media
Pressure roller
Cleaning blade
Waste toner container
Photosensitive
drum
ENWW Image-formation system 27
Pickup, feed, and delivery system
The media feed system picks up, feeds, and delivers the page.
Figure 1-23 Pickup, feed, and delivery system block diagram
Delivery roller
Pressure roller
Fuserfilm
Transfer roller
Photosensitive drum
Feed roller
Pickup roller
Separation pad
28 Chapter 1 Theory of operation ENWW
Photo sensors, motor, and solenoid
NOTE: The illustration in this section also shows the product motor, photo sensors, and solenoid. The
power switch is not shown.
Figure 1-24 Photo sensors, motor, and solenoid
PS702
PS701
PS751
SL1
M1
Table 1-8 Photo sensors, motor, and solenoid
Item Description
M1 Main motor
SL1 Pickup solenoid
PS701 Fuser delivery sensor
PS702 Media-width sensor
PS751 TOP sensor
ENWW Pickup, feed, and delivery system 29
Jam detection
The product uses the following sensors to detect the presence of paper and to check for jams. The page must
pass each sensor within a specified time.
NOTE: To find the following components, see Photo sensors, motor, and solenoid on page 29.
●
PS701; fuser delivery sensor
●
PS702; TOP sensor
NOTE: The product automatically ejects paper if the TOP sensor detects residual paper within the
product when the power is turned on or the door is closed.
The product detects the following jams:
●
Pickup stationary jam
●
Delivery delay jam
●
Delivery stationary jam
●
Fuser wrapping jam
●
Door open jam
●
Residual media jam
30 Chapter 1 Theory of operation ENWW
Scanner system
The flatbed image scanner captures an electronic image of the document on the glass. The scanner does this
by illuminating the document with LEDs (red, green, and blue) and capturing the image in the image sensor to
create an electronic format of the document. The flatbed scanner consists of three main elements
●
CIS scanner. The CIS (contact image sensor) scanner captures an image using the product's optical path.
Red, green, and blue LEDs sequentially illuminate a small strip of the document (often called a raster
line), and the optical system captures each color in a single row of CCD sensors that cover the entire
page width. Because only one color is captured for each line per exposure, the three colors are
recombined electronically to create the full color image. For monochromatic scans or copies, all three
LEDs are illuminated to create a white light for the scan so the raster line can be captured in one
exposure.
●
Mechanical carriage drive. The carriage drive moves the CIS scan head along the document length to
create the image. In this product, a small DC motor with an optical encoder creates this motion. The
speed of the carriage drive is proportional to the scan resolution (300 ppi is much faster than 1200 ppi)
and also proportional to the type of scan (color scans are three-times slower than monochromatic
scans). A 1200 ppi color scan moves so slowly that the product may appear to not be working, whereas
a monochromatic copy scan moves at 50 times that speed and will be a little noisy.
●
Image processing system (formatter). The formatter processes the scanner data into either a copy or a
scan to the computer. For copies, the image data is sent directly to the product without being
transmitted to the computer. Depending on user selections for the copy settings, the formatter
enhances the scanner data significantly before sending it to the product. Image data is captured at 300
ppi for copies and is user selectable for scans to the computer. Each pixel is represented by 8 bits for
each of the three colors (256 levels for each color), for a total of 24 bits per pixel (24-bit color).
Electrical system
Scanner power-on sequence of events
When the product is turned on, it performs the following tests:
●
Wall find. The scan carriage moves slowly to the left while watching an encoder on the carriage motor
to determine when the carriage has found the left side wall or stop. This enables the product to identify
the document origin (position of the original). If the document origin cannot be located, a default
position is used instead.
●
Home find. The scan carriage uses the optical scanner to find physical reference features that relate to
the document origin at the left side of the image glass. This process ensures accurate location of the
first document pixels so that the user documents will have an accurate placement of the image on
scans and copies. If the reference feature is not found, it uses a default value.
●
Calibration. This test, also known as scanner color calibration, enables the product to identify the black
and white on every pixel in the CIS. Calibration occurs in two major processes: a broad (analog)
adjustment of all pixels to bring them into the target output range, and a pixel-by-pixel adjustment
(digital) to fine tune the actual black and white response. The calibration process occurs under the left
side of flatbed image scanner where there is a special white calibration label.
Calibration is the most important step in creating a high quality image. Calibration problems can include
color inaccuracies, brightness inaccuracies, and vertical streaks through the image. The calibration
process identifies any bad pixels and enables the image formatter to recreate the lost information from
adjacent pixels. Extreme cases of this problem can appear as large vertical streaks or image smears.
ENWW Scanner system 31
You can force a scanner calibration by turning the product on or by performing a color calibration.
Scanner calibration occurs with each of these events.
Copy or scan-to-computer sequence of events
To create an accurate rendition of a document, the scanner must be calibrated for the requested operation. If
the user selects a scan at 600 ppi color, the flatbed image scanner calibrates for that specific operational
mode. Subsequently, the flatbed image scanner automatically re-calibrates for the next requested
operation. Calibration does not occur for every new copy request.
Normal sequence of operation for a flatbed copy or scan includes:
1. LEDs illuminate.
2. Carriage motion begins moving the CIS scanner toward the right.
3. Image capture continues for the entire page or length requested in a scan-to-computer operation.
4. Carriage returns to the home position on the left.
32 Chapter 1 Theory of operation ENWW
Document feeder functions and operation
The following sections describe how the document feeder functions.
Document feeder operation
Standby (paper-loading) mode: In standby mode, the stopper will be lowered to prevent the user from
inserting the original document too far. When a document is inserted correctly, the CIS will detect its
presence by the Flag_document status.
The standard operation of the document feeder consists of the pick and feed steps.
Pick: When it receives a copy or scan command, the SSA motor engages the gear train. The first roller, called
the pre-pick roller, moves the top few sheets forward into the document feeder. The next roller is the pickup
roller. This roller contacts the document feeder separation pad, which separates multiple pages into single
sheets.
Feed: The single sheet continues through the path. Along the way, the TOF sensor, which is a set distance
from the document feeder glass, detects the sheet. This alerts the scanner to start when the page reaches
the glass. The scanner acquires the image, one raster line at a time, until it detects the end of the page. The
page is then ejected. The pick and feed steps are repeated as long as paper is detected by the TOF sensor.
The document feeder will not function when the document feeder cover is open. The paper path is
incomplete if the document feeder cover is lifted from the glass.
Document feeder paper path and document feeder sensors
Figure 1-25 Document feeder paper path and document feeder sensors
1 2
Table 1-9 Document feeder sensors
Item Description
1 TOF/BOF sensor
2 Flag_document part
The CIS will detect the presence of the paper from the flag_document (callout 2) status. The document
feeder has one sensor that detects paper. If paper is in the document feeder, the TOF sensor (callout 1)
detects the top and bottom edges of the document. The TOF sensor detects media moving through the
document feeder. If a jam is detected, the document feeder immediately stops the paper from feeding and a
jam message is displayed on the control-panel display.
ENWW Document feeder functions and operation 33
Document feeder jam detection
The document feeder has one sensor that detects paper. The TOF sensor detects media moving through the
document feeder. If a jam is detected, the document feeder immediately stops the paper feeding and a jam
message appears on the control-panel display.
A jam can be detected under any of the following conditions:
●
Document-feeder jam. When documents are detected in the document feeder input tray, and a
command to copy, scan or fax is received, the scan module travels to the left side of the scan assembly
and stops beneath the document feeder scanner glass. The document feeder then attempts three
times, or for about ten seconds, to advance the paper to the TOF sensor. If the paper does not advance,
the scan module travels back to the home position on the right side of the scanner assembly. The
message Document feeder mispick. Reload. appears on the control-panel display.
●
Long-document jam. If the paper has advanced to trigger the TOF sensor, but the trailing edge is not
detected within the time allowed for a 381 mm (15 in) document (the maximum allowable page length
for the document feeder), the scanner returns to the home position on the right side of the scanner
assembly. The message Doc feeder jam. Clear, Reload. appears on the control-panel display.
●
Stall jam. When a page that is less than 381 mm (15 in) long has advanced to the TOF sensor but has
not left it within the expected time, the paper has probably stalled or jammed. The scanner returns to
the home position on the right side of the scanner assembly. The message Doc feeder jam. Clear,
Reload. appears on the control-panel display.
●
Other. If the paper stops in the document feeder and the scan module remains under the document
feeder scanner glass, an internal firmware error has probably occurred. This is usually remedied by
cycling the power.
34 Chapter 1 Theory of operation ENWW
Fax functions and operation
The following sections describe the product fax capabilities.
Computer and network security features
The product can send and receive fax data over telephone lines that conform to public switch telephone
network (PSTN) standards. The secure fax protocols make it impossible for computer viruses to be
transferred from the telephone line to a computer or network.
The following product features prevent virus transmission:
●
No direct connection exists between the fax line and any devices that are connected to the USB or
Ethernet ports.
●
The internal firmware cannot be modified through the fax connection.
●
All fax communications go through the fax subsystem, which does not use Internet data-exchange
protocols.
PSTN operation
The PSTN operates through a central office (CO) that generates a constant voltage on the TIP and RING wires
(48 V, usually). A device goes on-hook by connecting impedance (such as 600 ohms for the U.S.) across the
TIP and RING so that a line current can flow. The CO can detect this current and can send impulses like dial
tones. The product generates more signaling tones, such as dialing digits, to tell the CO how to connect the
call. The product can also detect tones, such as a busy tone from the CO, that tell it how to behave.
When the call is finally connected, the CO behaves like a piece of wire connecting the sender and receiver.
This is the period during which all of the fax signaling and data transfer occurs. When a call is completed, the
circuit opens again and the line-current flow ceases, removing the CO connection from both the sender and
the receiver.
On most phone systems, the TIP and RING wires appear on pins 3 and 4 of the RJ-11 modular jack (the one on
the fax card). These two wires do not have to be polarized because all the equipment works with either TIP or
RING on pin 3 and the other wire on pin 4. This means that cables of either polarity can interconnect and will
still work.
These basic functions of PSTN operation are assumed in the design of the fax subsystem. The product
generates and detects the signaling tones, currents, and data signals that are required to transmit and
receive faxes on the PSTN.
The fax subsystem
The formatter, fax card, firmware, and software all contribute to the fax functionality. The designs of the
formatter and fax card, along with parameters in the firmware, determine the majority of the regulatory
requirements for telephony on the product.
The fax subsystem is designed to support V.34 fax transmission, lower speeds (such as V.17 fax), and older
fax machines.
Fax card in the fax subsystem
Three versions of the fax card are used in the product. One for Asia Pacific countries/regions and the United
States, one for Europe, and one for Brazil. Each version is compliant with the 2/4-wire phone jack system
from the respective country/region.
ENWW Fax functions and operation 35
The fax card contains the modem chipset (DSP and CODEC) that controls the basic fax functions of tone
generation and detection, along with channel control for fax transmissions. The CODEC and its associated
circuitry act as the third-generation silicon data access arrangement (DAA) to comply with worldwide
regulatory requirements.
Safety isolation
The most important function of the fax card is the safety isolation between the high-voltage, transient-prone
environment of the telephone network (TNV [telephone network voltage]) and the low-voltage analog and
digital circuitry of the formatter (SELV [secondary extra-low voltage]). This safety isolation provides both
customer safety and product reliability in the telecom environment.
Any signals that cross the isolation barrier do so magnetically. The breakdown voltage rating of barriercritical components is greater than 5 kV.
Safety-protection circuitry
In addition to the safety barrier, the fax card protects against over-voltage and over-current events.
Telephone over-voltage events can be either differential mode or common mode. The event can be transient
in nature (a lightning-induced surge or ESD) or continuous (a power line crossed with a phone line). The fax
card protection circuitry provides margin against combinations of over-voltage and over-current events.
Common mode protection is provided by the selection of high-voltage-barrier critical components
(transformer and relay). The safety barrier of the fax card PCB traces and the clearance between the fax card
and surrounding components also contribute to common mode protection.
A voltage suppressor (a crowbar-type SIDACTOR) provides differential protection. This product becomes low
impedance at approximately 300 V differential, and crowbars to a low voltage. A series thermal switch works
in conjunction with the crowbar for continuous telephone line events, such as crossed power lines.
All communications cross the isolation barrier magnetically. The breakdown voltage rating of barrier-critical
components is greater than 5 kV.
Data path
TIP and RING are the two-wire paths for all signals from the telephone network. All signaling and data
information comes across them, including fax tones and fax data.
The telephone network uses DC current to determine the hook state of the telephone, so line current must be
present during a call. The silicon DAA provides a DC holding circuit to keep the line current constant during a
fax call.
The silicon DAA converts the analog signal to a digital signal for DSP processing, and also converts the digital
signal to an analog signal for transmitting data through a telephone line.
The magnetically coupled signals that cross the isolation barrier go either through a transformer or a relay.
The DSP in the fax card communicates with the ASIC in the formatter using the high-speed serial interface.
Hook state
Another magnetically coupled signal is the control signal that disconnects the downstream telephone
devices (such as a phone or answering machine). A control signal originating on the DSP can change the relay
state, causing the auxiliary jack (downstream jack) to be disconnected from the telephone circuit.
36 Chapter 1 Theory of operation ENWW
The product takes control of calls that it recognizes as fax calls. If the product does not directly pick up the
call, it monitors incoming calls for the fax tone or for the user to direct it to receive a fax. This idle mode is
also called eavesdropping. This mode is active when the product is on-hook but current exists in the
downstream phone line because another device is off-hook. During eavesdropping, the receive circuit is
enabled but has a different gain from the current that is generated during normal fax transmissions.
The product does not take control of the line unless it detects a fax tone or the user causes it to connect
manually. This feature allows the user to make voice calls from a phone that is connected to the product
without being cut off if a fax is not being received.
Downstream device detection
The line voltage monitoring module of the silicon DAA can detect the line state as well as the downstream
device. It tells DSP via DIB that an active device (telephone, modem, or answering machine) is connected to
the auxiliary port on the product (the right side of the RJ-11 jack). The DSP uses the signal to ensure that the
product does not go off-hook (and disconnect a downstream call) until it has been authorized to do so (by a
manual fax start or the detection of the appropriate tones).
Hook switch control
In the silicon DAA the CODEC controls the hook switch directly. The CODEC is activated when it receives
commands from the DSP. When the circuit is drawing DC current from the central office it is considered offhook. When no DC current flows the state is considered on-hook.
Ring detect
Ring detect is performed by the line voltage monitoring module of the silicon DAA, and is a combination of
voltage levels and cadence (time on and time off). Both must be present to detect a valid ring. The CODEC
works with DSP as well as the firmware to determine if an incoming signal is an answerable ring.
Line current control
The DC current from the CO needs to have a path to flow from TIP to RING. The DC impedance emulation line
modulator and DC terminations modules in the silicon DAA act as a DC holding circuit, and works with the
firmware to achieve the voltage-current characteristic between TIP and RING. The impedance (the currentvoltage characteristic) changes corresponding to certain special events, such as pulse dialing or when the
product goes on-hook.
Billing- (metering-) tone filters
Switzerland and Germany provide high-frequency AC signals on the phone line in order to bill customers.
A filter in a special fax cable (for certain countries/regions), can filter these signals. Because these billing
signals are not used in the U.S., these filters are not present in the U.S. fax cable.
To obtain a special fax cable, contact your local telephone service provider.
Fax page storage in flash memory
Fax pages are the electronic images of the document page. They can be created in any of three ways:
scanned to be sent to another fax machine, generated to be sent by the computer, or received from a fax
machine to be printed.
The product stores all fax pages in flash memory automatically. After these pages are written into flash
memory, they are stored until the pages are sent to another fax machine, printed on the product, transmitted
to the computer, or erased by the user.
ENWW Fax functions and operation 37
These pages are stored in flash memory, which is the nonvolatile memory that can be repeatedly read from,
written to, and erased. The product has 8 MB of flash memory, of which 7.5 MB is available for fax storage.
The remaining 0.5 MB is used for the file system and reclamation. Adding RAM does not affect the fax page
storage because the product does not use RAM for storing fax pages.
Stored fax pages
The user can reprint stored fax receive pages in case of errors. For a fax send, the product will resend the fax
in case of errors. The product will resend stored fax pages after a busy signal, communication error, no
answer, or power failure. Other fax devices store fax pages in either normal RAM or short-term RAM. Normal
RAM immediately loses its data when power is lost, while short-term RAM loses its data about 60 minutes
after power failure. Flash memory maintains its data for years without any applied power.
Advantages of flash memory storage
Fax pages that are stored in flash memory are persistent. They are not lost as a result of a power failure, no
matter how long the power is off. Users can reprint faxes in case the toner cartridge runs out of toner or the
product experiences other errors while printing faxes.
The product also has scan-ahead functionality that makes use of flash memory. Scan-ahead automatically
scans pages into flash memory before a fax job is sent. This allows the sender to pick up the original
document immediately after it is scanned, eliminating the need to wait until the fax is transmission is
complete.
Because fax pages are stored in flash memory rather than RAM, more RAM is available to handle larger and
more complicated copy and print jobs.
38 Chapter 1 Theory of operation ENWW
2 Solve problems
●
Solve problems checklist
●
Troubleshooting process
●
Tools for troubleshooting
●
Clear jams
●
Solve paper-handling problems
●
Solve image-quality problems
●
Clean the product
●
Solve performance problems
●
Solve connectivity problems
●
Service mode functions
●
Solve fax problems
●
Product updates
ENWW 39
Solve problems checklist
Table 2-1 Basic problem solving
Problem Cause Solution
When the product is connected to a
correctly grounded power source, the
control panel does not illuminate and the
main motor does not rotate.
When turned on, the control panel
illuminates, but the main motor does not
rotate.
No power to the product. 1. Verify that the power switch is turned
The product has an internal power failure. Check the fuses and internal cable
The formatter is defective. Replace the formatter.
The engine controller PCA is defective. Replace the engine controller PCA.
The toner-cartridge door is open. Close the toner-cartridge door.
A page is jammed in the paper path. Clear all paper from the paper path, and
The cable is not connected correctly. Reconnect the motor cable.
The motor is not mounted correctly in the
product chassis.
The engine controller PCA is defective. Replace the engine controller PCA.
on.
2. Verify that the power cable is
correctly connected to the outlet and
the product.
3. Verify that the power outlet has the
correct voltage.
connections. Replace any defective cables
or open fuses.
make sure that all sensors are working
correctly.
Verify that the motor is connected
correctly and that it rotates freely.
The product turns on and the motor
rotates, but the control-panel lights do not
illuminate.
The product is on, but the control-panel
indicates that the product is not in the
"ready" state.
The main motor is defective. Replace the motor.
The control panel is defective. Replace the control panel.
The formatter is defective. Replace the formatter.
For fax models, the fax PCA is defective. Replace the fax PCA.
The product has an internal error that was
detected during the Power-On Self-Test
sequence.
Consult the list of control-panel messages
to identify and correct the error.
40 Chapter 2 Solve problems ENWW
Table 2-1 Basic problem solving (continued)
Problem Cause Solution
The product turns on, the motor rotates,
and the control panel indicates the "ready"
state, but the product does not print.
The product prints the engine test and the
Demo page, but does not print jobs from a
computer.
A component is defective. Perform an engine test to verify print-
engine components.
1. Print an engine test page.
2. If the engine test page does not print,
check all the connectors on the
engine controller PCA, and reconnect
any cables that are connected
incorrectly.
3. If, after checking the connectors, the
error persists, replace the engine
controller PCA.
The formatter is defective. Print a demo page. Press or touch the
Setup
the Setup menu, open the Reports menu,
and then select Demo Page.
If the Demo page does not print, replace
the formatter.
The network or USB cable is not connected
correctly.
An incorrect driver is selected. Select the correct print driver.
Reconnect the cable.
NOTE: Try using a new USB cable that is
3 m (10 ft) or less in length.
button (LCD models) or Setup
button (touchscreen models) to open
The print driver is not installed correctly. Remove and then reinstall the product
Other devices are connected to the product
(for example, through a switch or hub) that
are interfering with the computer-product
communications.
There is a computer-port communications
problem.
The formatter is defective. Replace the formatter.
software. Make sure that you use the
correct procedure and port setting.
Disconnect the other devices, switches, or
hubs.
Reset the computer port settings (see the
computer user guide for more
information).
ENWW Solve problems checklist 41
Troubleshooting process
Determine the problem source
The following table includes basic questions to ask the customer to quickly help define the problem.
General topic Questions
Environment
Paper
Input trays
Toner cartridge
●
Is the product installed on a solid, level surface (± 1°)?
●
Is the power-supply voltage within ± 10 volts of the specified power source?
●
Is the power-supply plug inserted in the product and the outlet?
●
Is the operating environment within the specified parameters?
●
Is the product exposed to ammonia gas, such as that produced by diazo copiers or
office cleaning materials?
NOTE: Diazo copiers produce ammonia gas as part of the copying processes.
Ammonia gas (from cleaning supplies or a diazo copier) can have an adverse affect
on some product components (for example, the toner-cartridge imaging drum).
●
Is the product exposed to direct sunlight?
●
Does the customer use only supported paper?
●
Is the paper in good condition (no curls, folds, or distortion)?
●
Is the paper stored correctly and within environmental limits?
●
Is the amount of paper in the tray within specifications?
●
Is the paper correctly placed in the tray?
●
Are the paper guides aligned with the stack?
●
Is the toner cartridge installed correctly?
NOTE: Check for an empty, refilled, or cloned toner cartridge.
Transfer roller and fuser
Toner-cartridge door
Condensation
Miscellaneous
●
Are the transfer roller and fuser installed correctly?
NOTE: Check for fuser film damage or a contaminated or dirty transfer roller.
●
Is the toner-cartridge door closed?
NOTE: Check for a damaged door interlock switch or cabling.
●
Does condensation occur following a temperature change (particularly in winter
following cold storage)? If so, wipe affected parts dry or leave the product on for
10 to 20 minutes.
●
Was a toner cartridge opened soon after being moved from a cold to a warm room?
If so, allow the toner cartridge to sit at room temperature for 1 to 2 hours.
●
Check for and remove any non-HP components (for example, a toner cartridge)
from the product.
●
Remove the product from the network and make sure that the failure is with the
product before beginning troubleshooting.
42 Chapter 2 Solve problems ENWW
Power subsystem
Power-on checks
Turn on the power. If the control panel does not illuminate, perform the power-on checks to find the cause of
the problem.
1. Verify that the product is plugged into an active electrical outlet that delivers the correct voltage.
2. Verify that the power switch is in the on position.
3. Make sure that the product makes the expected start up sounds.
NOTE: The over-current/over-voltage protection circuit in the low-voltage power supply unit might be
functioning. Turn the product off, unplug the power cord, and turn the product on. If the product does
not function, the fuse melts, or the power supply is malfunctioning, replace the engine controller unit.
ENWW Troubleshooting process 43
Tools for troubleshooting
Component diagnostics
Engine diagnostics
Printing test pages helps determine whether the product engine and the formatter are functioning. If the
formatter is damaged, it might interfere with the engine test. If the engine-test page does not print, try
removing the formatter and then performing the engine test again. If the engine test is then successful, the
problem is almost certainly with the formatter.
Engine-test page
NOTE: The product has an engine-test page in the firmware that is printed by opening and closing the
toner-cartridge door in a specific pattern. Use A4 or letter-size paper to print the engine-test page.
1. Make sure that paper is correctly loaded in the tray.
2. Turn the product on. Wait for the product to reach the Ready state.
3. Open, and then close the toner-cartridge door five times at an interval of about two seconds to start the
internal engine-test.
4. If the engine test is successful, an engine-test page prints. The engine-test page has test patterns
including horizontal lines, solid black areas, and images.
Drum rotation functional check
The photosensitive drum, located in the toner cartridge, must rotate for the print process to work. The
photosensitive drum receives its drive from the main drive assembly.
NOTE: This test is especially important if refilled toner cartridges have been used.
1. Open the toner-cartridge door.
2. Remove the toner cartridge.
3. Mark the drive gear on the cartridge with a felt-tipped marker. Note the position of the mark.
4. Replace the toner cartridge and close the toner-cartridge door. The startup sequence should rotate the
drum enough to move the mark.
5. Open the toner-cartridge door and inspect the gear that was marked in step 3. Verify that the mark
moved.
If the mark did not move, inspect the main drive assembly to make sure that it is meshing with the tonercartridge gears. If the drive gears appear functional and the drum does not move, replace the toner cartridge.
Half self-test functional check
The half self-test check determines which printing process is malfunctioning. This process requires you to
stop the product while it is in the process of printing a page.
1. Print a Configuration page.
44 Chapter 2 Solve problems ENWW
LCD control panels
a. Press the Setup
on the product control panel.
b. Open the Reports menu.
c. Select Config Report to begin printing the report.
Touchscreen control panels
a.
From the Home screen on the product control panel, touch the Setup
button.
b. Touch Reports.
c. Touch Configuration Report to begin printing the report.
2. Open the toner-cartridge-door after the paper advances halfway through the product (about five
seconds after the motor begins rotating). The leading edge of the paper should have advanced past the
toner cartridge.
3. Remove the toner cartridge.
4. Open the toner-cartridge drum shield to view the drum surface. If a dark and distinct toner image is
present on the drum surface, assume that the first two functions of the electrophotographic process
are functioning (image formation and development). Troubleshoot the failure as a transfer or fusing
problem.
If there is no image on the photosensitive drum, perform these checks:
1. Make sure you removed the entire length of the sealing tape from the toner cartridge before you
installed the cartridge.
2. Perform a drum rotation functional check to make sure that the drum is rotating.
3. Make sure that the high-voltage contacts are clean and not damaged.
ENWW Tools for troubleshooting 45
Diagrams
Plug/jack locations
1
2
3
4
5
6
1 Slot for cable-type security lock
2 Hi-Speed USB 2.0
3 Ethernet port
4 Power connection
5 Fax "line in" port for attaching the fax phone line to the product
6 Telephone "line out" port for attaching an extension phone, answering machine, or other device
46 Chapter 2 Solve problems ENWW
Location of connectors
Figure 2-1 Engine controller PCA connectors
J304
J534
FT3
J551
J571
J101
J552
J562
J542
J531
J104
Item Description Item Description
J101 Fuser J551 Top sensor PCA
J104 Power receptacle J552 Paper-width sensor
J581
J501
J532
J304 High voltage Fuser-delivery sensor
J501 Not used Thermistor
J531 Formatter J562 Pickup solenoid
J532 Formatter J571 Motor drive PCA
J534 Formatter J581 Cartridge memory tag (E-label)
J542 Laser/scanner
ENWW Tools for troubleshooting 47
Locations of major components
Figure 2-2 Main PCAs
4
3
2
1 Motor drive PCA 3 TOP sensor PCA (Pickup sensor PCA)
2 Engine controller PCA 4 Paper sensor PCA (Fuser PCA)
1
48 Chapter 2 Solve problems ENWW
Figure 2-3 Motor
1
1Main motor
ENWW Tools for troubleshooting 49
Figure 2-4 Solenoid
1
1 Pickup solenoid
50 Chapter 2 Solve problems ENWW
Figure 2-5 Sensors
4
3
2
1
1 Main motor rotation count sensor 3 Fuser delivery sensor
2 TOP sensor 4 Paper-width sensor
ENWW Tools for troubleshooting 51
Figure 2-6 Cross section view
182 3 4 5 6
79
Item Description Item Description
1 Pressure roller 6 Laser/scanner
2 Fuser film assembly 7 Pickup roller
3 Delivery roller 8 Separation pad
4 Photosensitive drum 9 Transfer roller
5 Toner cartridge
52 Chapter 2 Solve problems ENWW
General timing chart
NOTE: The general timing chart is for the product base only.
Figure 2-7 General timing diagram
STBY
LSTRTNIRPRTNIYBTSTIAW
Power switch ON
Operation
3 Print start command (EEC12)
4 Scanner Motor (M2)
5 Laser Diode
7 Main Motor (M1)
8 Primary Charging Bias
1 TOP sensor (PS751)
Timing chart two consecutive prints on LTR paper
2 Fuser delivery sensor (PS701)
6 BD Output signal (BDO)
9 Developing Bias
12 Pickup solenoid (SL1)
10 Transfer Charging Bias
11 Fuser Heater181314151617
19
20
ENWW Tools for troubleshooting 53
General circuit diagram
NOTE: The general circuit diagram is for the product base only.
Figure 2-8 Circuit diagram
1
2
D
21
M
M1
12
J3
12
E-label
1
FT1
2
J581
123
TAGIN
HV
J304
TAGOUT
J571
J901
123
J902
11
GND
4
GND
GND
+24P2
C
321
PS901
Motor drive PCA
45678910
567891011
ACC
DEC
+24P2
+24P2
+3.3U
1
2
3
4
123
MFG
/MTRPWM
B
M
M2
1234
J903
1234
J1
+24P2
ACC
DEC
GND
A
Laser drive PCA
J801
123456789
Laser scanner ass’y
SI1
J542
1
2345678
+3.3U
/BDIR
9
GND
VDO
CNT0
CNT1
/VDO
GNDSOTEST
J501
432
J104
AC H
231
AC N
J532
21
J531
21
+24F
GND
SC
12
12345
J46
GND
SCLK
6
/VDO
VDO
/BDO
7891011 13
Formatter
Engine controller PCA
AC H
J101
Fuser ass’y
12
21
J1011
H1
TH1
12
AC N
231
TP
TP1
21
J552
FSRTH
GND
542
PS702
/PWSNS
3
/POSNS
1
321
321
+3.3U
12345
J701
+24U
GND
/PISNS
SL
21
J562
12
SL
SL1
+3.3U
123
J551
231
J751
321
PS751
/SWON
LED
3.3F
GND
1234567891011 13
12
J534
J21
12
21
J45
321
INL101
TOP sensor PCA
PS701
GND
21
6 5 4 3
FSRTH
J702
Paper sensor PCA
54 Chapter 2 Solve problems ENWW
Internal print-quality test pages
Clean the paper path
If you are experiencing toner specks or dots on the printouts, clean the paper path.
LCD control panel
1. From the product control panel, press the Setup
2. Open the Service menu.
3. Use the arrow keys to select the Cleaning mode option, and then press the OK button.
The product prints the first side and then prompts you to remove the page from the output bin and
reload it in Tray 1, keeping the same orientation. Wait until the process is complete. Discard the page
that prints.
Touchscreen control panel
1.
From the Home screen on the product control panel, touch the Setup
2. Touch the Service menu.
3. Touch the Cleaning Page button.
4. Load plain letter or A4 paper when you are prompted.
5. Touch the OK button to begin the cleaning process.
The product prints the first side and then prompts you to remove the page from the output bin and
reload it in Tray 1, keeping the same orientation. Wait until the process is complete. Discard the page
that prints.
Print the configuration page
button.
button.
The configuration page lists current product settings and properties. It also contains a status log report. To
print a configuration page, do the following:
LCD control panels
1. From the product control panel, press the Setup
2. Open the Reports menu.
3. Use the arrow keys to select Config Report and then press the OK button to begin printing the report.
ENWW Tools for troubleshooting 55
button.
Touchscreen control panels
1.
From the Home screen on the product control panel, touch the Setup
2. Touch Reports.
3. Touch Configuration Report to begin printing the report.
button.
56 Chapter 2 Solve problems ENWW
Print-quality troubleshooting tools
Repetitive defect ruler
If the product output has a consistent, repetitive defect, and then use the table in this section to determine
which part needs to be replaced based on the measured distance between the repetitions of the defect.
Component Distance between defects (mm) Type of defects
Primary charging roller About 27 Dirt on page
Photosensitive drum About 75 Dirt on page
Developing roller About 34 Dirt on page
Transfer roller About 39 Dropouts
Fuser film About 57 Dirt on page
Dropouts
Dropouts
Dropouts
Dirt on the back of page
Dropouts
Loose toner
Pressure roller About 56 Dirt on the back of page
Loose toner
ENWW Tools for troubleshooting 57
Control panel menus
Touchscreen control panel
Setup menu
To open this menu, touch the Setup
●
HP Web Services
●
Reports
●
Self Diagnostics
●
Fax Setup
●
System Setup
●
Service
●
Network Setup
HP Web Services menu
NOTE: This menu is also available by touching the Web Services button on the Home screen.
Table 2-2 HP Web Services menu (touchscreen control panel)
Menu item Description
Enable Web Services If no wired or wireless network connection is available or if Web Services is disabled, use
button. The following sub-menus are available:
Enable Web Services to set up Web Services on the product.
NOTE: You must be connected to a network to enable HP Web Services.
Display E-mail Address If Web Services is enabled, this option displays the product ePrint email address.
Print Information Sheet If Web Services is enabled, this option prints the HP ePrint mobile printing report. Use
this report to setup ePrint in ePrint Center.
Turn ePrint On/Off If Web Services is enabled, use this option to turn the ePrint function on or off.
Turn Apps On/Off If Web Services is enabled, use this option to turn apps on or off.
Remove Web Services If Web Services is enabled, use this option to disable Web Services and remove the ePrint
address.
Proxy Settings The Proxy Settings sub-menu includes the following:
●
Proxy Server
●
Proxy Port
●
User Name
●
Password
58 Chapter 2 Solve problems ENWW
Reports menu
Table 2-3 Reports menu (touchscreen control panel)
Menu item Description
Demo Page Prints a page that demonstrates print quality.
Menu Structure Prints a control panel menu layout map.
Config Report Prints a list of the product settings.
Supplies Status Prints the toner cartridge status and includes the following information:
Usage Page Displays the number of pages printed by the product.
Self Diagnostics menu
●
Approximate pages remaining
●
Supply level
●
Serial number
●
Pages printed with this supply
●
First install date
●
Last used date
Table 2-4 Self Diagnostics menu (touchscreen control panel)
Menu item Description
Run Network Test Performs a wireless network test and prints the results.
Run Fax test Performs a fax connectivity test and prints the results.
Fax Setup menu
In the following table, items that have an asterisk (*) indicate the factory default setting.
Table 2-5 Fax Setup menu (touchscreen control panel)
Menu item Sub-menu item Sub-menu item Description
Fax Set-Up Utility This is a tool for configuring the fax settings. Follow
Basic Setup Time/Date 12 Hour
Fax Header Sets the identifying information that is sent to the
the on-screen prompts and select the appropriate
response for each question.
Sets the time and date setting for the product.
24 Hour
receiving product.
ENWW Tools for troubleshooting 59
Table 2-5 Fax Setup menu (touchscreen control panel) (continued)
Menu item Sub-menu item Sub-menu item Description
Answer Mode Automatic*
Manual
TAM
Fax/Tel
Rings to Answer Sets the number of rings that must occur before the
Distinctive Ring All Rings*
Single
Sets the type of answer mode. The following
options are available:
●
Automatic: The product automatically answers
an incoming call on the configured number of
rings.
●
Manual: The user must touch the Start Fax
button or use an extension phone number to
make the product answer the incoming call.
●
TAM: A telephone answering machine (TAM) is
attached to the Auxiliary phone port of the
product. The product will not pick up any
incoming call, but will listen for fax tones after
the answering machine has picked up the call.
●
Fax/Tel: The product must automatically pick
up the call and determine if the call is a voice
or fax call. If the call is a fax call, the product
handles the call as usual. If the call is a voice
call, an audible synthesized ring is generated
to alert the user of an incoming voice call.
fax modem answers. The default setting is 5.
If you have distinctive ring phone service, use this
item to configure how the product responds to
incoming calls.
Double
Triple
Double and Triple
Dial prefix On
Off*
Advanced setup Fax Resolution Standard
Fine*
Superfine
Photo
Lighter/Darker Sets the darkness for outgoing faxes.
Fit to Page On*
Off
●
All Rings: The product answers any calls that
come through the telephone line.
●
Single: The product answers any calls that
produce a single-ring pattern.
●
Double: The product answers any calls that
produce a double-ring pattern.
●
Triple: The product answers any calls that
produce a triple-ring pattern.
●
Double and Triple: The product answers any
calls that produce a double-ring or triple-ring
pattern.
Specifies a prefix number that must be dialed when
sending faxes from the product.
Sets the resolution for sent documents. Higher
resolution images have more dots per inch (dpi), so
they show more detail. Lower resolution images
have fewer dots per inch and show less detail, but
the file size is smaller and the fax takes less time to
transmit.
Shrinks incoming faxes that are larger than the
paper size set for the tray.
60 Chapter 2 Solve problems ENWW
Table 2-5 Fax Setup menu (touchscreen control panel) (continued)
Menu item Sub-menu item Sub-menu item Description
Glass Size Letter*
A4
Dialing Mode Tone*
Pulse
Redial if Busy On*
Off
Redial if No Answer On
Off*
Redial if Comm. Error On*
Off
Detect Dial Tone On*
Off
Extension Phone On*
Off
Stamp Faxes On
Off*
Sets the default paper size for documents being
scanned from the flatbed scanner.
NOTE: The default setting is determined by the
choice of location during the initial product setup.
Sets whether the product should use tone or pulse
dialing.
Sets whether the product should attempt to redial if
the line is busy.
Sets whether the product should attempt to redial if
the recipient fax number does not answer.
Sets whether the product should attempt to redial
the recipient fax number if a communication error
occurs.
Sets whether the product should check for a dial
tone before sending a fax.
When this feature is enabled, the 1-2-3 buttons on
the extension phone may be pressed to cause the
product to answer an incoming fax call.
Sets the product to print the date, time, sender's
phone number, and page number on each page of
incoming faxes.
Private Receive On
Print faxes
Off*
Allow Fax Reprint On*
Off
Fax/Tel Ring Time Sets the time, in seconds, after which the product
Fax Speed Fast(V.34)*
Medium(V.17)
Slow(V.29)
Setting Private Receive to On requires you to set a
product password. After setting the password, the
following options are set:
●
Private Receive is turned on.
●
All old faxes are deleted from memory.
●
Fax forwarding is set to Off and is not allowed
to be changed.
●
All incoming faxes are stored in memory.
Sets whether incoming faxes are stored in memory
for reprinting later.
should stop sounding the Fax/Tel audible ring to
notify the user of an incoming voice call. The
default setting is 20 seconds.
Sets the allowed fax communication speed.
ENWW Tools for troubleshooting 61
System Setup menu
In the following table, items that have an asterisk (*) indicate the factory default setting.
Table 2-6 System Setup menu (touchscreen control panel)
Menu item Sub-menu item Sub-menu item Description
Language (Lists available control-
panel display
languages.)
Paper Setup Paper Size Letter
Paper Type (Lists available paper
Print Density Determines how much toner to apply to thicken
Energy Settings Sleep/Auto Off After 5 Minutes
Wake/Auto On Events Control Panel Touch
Sets the language in which the control panel
A4
Legal
types.)
15 Minutes
30 Minutes
60 Minutes
USB Job
LAN Job
Wireless Job
displays messages and product reports.
Sets the size for printing internal reports, faxes, or
any print job that does not specify a size.
NOTE: The default setting is determined by the
choice of location during the initial product setup.
Sets the type for printing internal reports, faxes, or
any print job that does not specify a type.
lines and edges.
Specifies the amount of idle time before the product
enters sleep mode.
Select the events that bring the product out of sleep
mode.
Fax
Auto Off/Manual On
After
Supply Settings Black Cartridge Very Low Setting
Low Threshold Enter a percentage for the low threshold setting.
Store Usage Data Not on Supplies*
Never
2 Hours
4 Hours
8 Hours
On Supplies
Set the amount of elapsed time before the product
turns itself off.
●
Stop: The product stops printing until you
replace the toner cartridge.
●
Prompt: The product stops printing and
prompts you to replace the toner cartridge.
You can acknowledge the prompt and
continue printing.
●
Continue* The product alerts you that the
toner cartridge is very low, but it continues
printing.
Select where to store the product's usage data,
either on the supplies or not on the supplies.
62 Chapter 2 Solve problems ENWW
Table 2-6 System Setup menu (touchscreen control panel) (continued)
Menu item Sub-menu item Sub-menu item Description
Volume Settings Alarm Volume
Ring Volume
Key-Press Volume
Phone Line Volume
Time/Date 12 Hour
24 Hour
Set the volume levels for the product. The following
options are available for each volume setting:
●
Off
●
Soft*
●
Medium
●
Loud
Sets the time and date setting for the product.
ENWW Tools for troubleshooting 63
Service menu
In the following table, items that have an asterisk (*) indicate the factory default setting.
Table 2-7 Service menu (touchscreen control panel)
Menu item Sub-menu item Description
Fax Service Clear Saved Faxes Clears all faxes in memory.
Run Fax Test Performs a fax test to verify that the phone cord is plugged in the
Print T.30 Trace Prints or schedules a report that is used to troubleshoot fax
Error Correction The error correction mode allows the sending device to re-
Fax Service Log The fax service log prints out the last 40 entries in the fax log.
Cleaning Page Cleans the product when specks or other marks appear on printed
USB Speed High*
Full
correct outlet and that there is a signal on the phone line. A fax
test report is printed indicating the results.
transmission issues. Schedule options include the following:
●
Now
●
Never*
●
If Error
●
At End of Call
transmit data if it detects an error signal.
output. The cleaning process removes dust and excess toner from
the paper path.
When selected, the product prompts you to load plain Letter or
A4 paper in Tray 1. Touch the OK button to begin the cleaning
process. Wait until the process completes. Discard the page that
prints.
Sets the USB speed for the USB connection to the computer. For
the product to actually operate at high speed, it must have high
speed enabled and be connected to an EHCI host controller that is
also operating at high speed. This menu item does not reflect the
current operating speed of the product.
Less Paper Curl When printed pages are consistently curled, this option sets the
Archive Print When printing pages that will be stored for a long time, this
HP Smart Install Enables or disables the HP Smart Install feature on the product.
Restore Defaults Sets all settings to the factory default values.
Signature Check Cancel if Invalid
Prompt if Invalid
product to a mode that reduces curl.
option sets the product to a mode that reduces toner smearing
and dusting.
Validates HP firmware downloads.
64 Chapter 2 Solve problems ENWW
Network Setup menu
In the following table, items that have an asterisk (*) indicate the factory default setting.
Table 2-8 Network Setup menu (touchscreen control panel)
Menu item Sub-menu item Description
Wireless Menu Wireless Direct Settings Manage the product's wireless direct settings.
Wireless Setup Wizard Guides you through the steps to set up the product on a wireless
Wi-Fi Protected Setup If your wireless router supports this feature, use this method to
Run Network Test Tests the wireless network and prints a report with the results.
Turn Wireless On/Off Enables or disables the wireless network feature.
TCP/IP Config Automatic*
Manual
Network Services IPv4
IPv6
Link Speed Automatic*
10T Full
10T Half
network.
set up the product on a wireless network. This is the simplest
method.
Automatic: The product automatically configures all the TCP/IP
settings via DHCP, BootP or AutoIP.
Manual: You can manually configure the IP address, subnet mask,
and default gateway. The control panel prompts you to specify
values for each address section. As each address is completed,
the product prompts for address confirmation before moving to
the next one. After all three addresses are set, the network
reinitializes.
Enable or disable the IPv4 and IPv6 protocols. By default, each
protocol is enabled.
Sets the link speed manually if needed.
After setting the link speed, the product automatically restarts.
Fax Menu
100TX Full
100TX Half
Restore Defaults Resets all network configurations to their factory defaults.
In the following table, items that have an asterisk (*) indicate the factory default setting.
Table 2-9 Fax Menu (touchscreen control panel)
Menu item Sub-menu item Sub-menu item Description
Fax Reports Fax Confirmation On Every Fax
On Send Fax Only
On Receive Fax Only
Never*
Sets whether the product prints a confirmation
report after a successful fax job.
ENWW Tools for troubleshooting 65
Table 2-9 Fax Menu (touchscreen control panel) (continued)
Menu item Sub-menu item Sub-menu item Description
Include First Page On*
Off
Fax Error Report On Every Error*
On Send Error
On Receive Error
Never
Print Last Call Report On*
Off
Fax Activity Log Print Log Now
Auto Log Print
Print Phone Book Prints a list of the speed dials that have been set up
Print Junk Fax List Prints a list of phone numbers that are blocked
Print All Fax Reports Prints all fax-related reports.
Send Options Send Fax Later Send Fax time
Sets whether the product includes a thumbnail
image of the first page of the fax on the report.
Sets whether the product prints a report after a
failed fax job.
Prints a detailed report of the last fax operation,
either sent or received.
Print Log Now: Prints a list of the faxes that have
been sent from or received by this product.
Auto Log Print: Automatically prints a report after
every fax job.
for this product.
from sending faxes to this product.
Allows a fax to be sent at a later time and date.
Send Fax date
Broadcast Fax Sends a fax to multiple recipients.
Fax Job Status Displays pending fax jobs, and allows you to cancel
pending fax jobs.
Fax Resolution Standard
Fine*
Superfine
Photo
Receive Options Block Junk Faxes Add Number
Delete Number
Delete All Numbers
Print Junk Fax List
Print Private Faxes Prints stored faxes when the private-receive
Reprint Faxes Prints the received faxes stored in available
Sets the resolution for sent documents. Higher
resolution images have more dots per inch (dpi), so
they show more detail. Lower resolution images
have fewer dots per inch and show less detail, but
the file size is smaller.
Modifies the junk fax list. The junk fax list can
contain up to 30 numbers. When the product
receives a call from one of the junk fax numbers, it
deletes the incoming fax. It also logs the junk fax in
the activity log along with job accounting
information.
feature is turned on. The product prompts you for
the system password.
memory. This item is available only if you have
turned on the Allow Fax Reprint feature in the Fax
Setup menu.
66 Chapter 2 Solve problems ENWW
Table 2-9 Fax Menu (touchscreen control panel) (continued)
Menu item Sub-menu item Sub-menu item Description
Copy Menu
Forward Fax On
Off*
Polling Receive Allows the product to call another fax machine that
Phone Book Setup Individual Setup Edits the fax phone book speed dial entries.
Delete Entry Deletes a specific phone book entry.
Delete All Entries Deletes all entries in the phone book.
Print Report Prints a list of all the individual dial entries in the
Change Defaults Fax Setup Utility Opens the Fax Setup menu.
Sets product to send all received faxes to another
fax machine.
has polling send enabled.
phone book.
To open this menu, touch the Copy button on the Home screen, and then touch the Settings button.
In the following table, items that have an asterisk (*) indicate the factory default setting.
Table 2-10 Copy Menu (touchscreen control panel)
Menu item Sub-menu item Description
Number of Copies Specifies the number of copies.
Reduce/Enlarge Original=100%*
A4 to Letter=94%
Letter to A4=97%
Full Page=91%
Fit to Page
2 Pages per Sheet
4 Pages per Sheet
Custom: 25 to 400%
Lighter/Darker Specifies the contrast of the copy.
Optimize Draft
Mixed
Text*
Picture
Paper Letter
Legal
A4
Specifies the size of the copy.
Specifies the type of content in the original document, so the
copy is the best match for the original.
Specifies the paper size.
NOTE: The default paper size setting is determined by the
choice of location during the initial product setup.
ENWW Tools for troubleshooting 67
Table 2-10 Copy Menu (touchscreen control panel) (continued)
Menu item Sub-menu item Description
Collation On
Off*
Set as New Defaults Saves any changes you have made to this menu as the new
Restore Defaults Restores the factory defaults for this menu.
Specifies whether to collate copy jobs.
defaults.
68 Chapter 2 Solve problems ENWW
LCD control panel
Setup menu
To open this menu, press the Setup
●
HP Web Services
●
Phone Book
●
Fax Job Status
●
Fax Functions
●
Reports
●
Fax Setup
●
System Setup
●
Service
●
Network Setup
HP Web Services menu
NOTE: This menu is also available by pressing the ePrint button on the product control panel.
Table 2-11 HP Web Services menu (LCD control panel)
Menu item Description
button. The following sub-menus are available:
Print Info Sheet If Web Services is enabled, this option prints the HP ePrint mobile printing report. Use
ePrint On/Off If Web Services is enabled, use this option to turn the ePrint function on or off.
Remove Services If Web Services is enabled, use this option to disable Web Services and remove the ePrint
Phone Book menu
Use the Phone Book menu to enter a pre-programmed number and then select the number.
Table 2-12 PhoneBook Number menu (LCD control panel)
Menu item Sub-menu item Description
Phone Book Number Phone Book fax # Save a fax number to the product phone book.
Phone Book name Enter a name to a fax number in the product phone book.
Fax Job Status menu
The Fax Job Status menu displays the list of all faxes that are waiting to be sent, received but waiting to be
printed, received but waiting to be forwarded, or received but waiting to be uploaded to a computer.
this report to setup ePrint in ePrint Center.
address.
ENWW Tools for troubleshooting 69
Fax Functions menu
Table 2-13 Fax Functions menu (LCD control panel)
Menu item Sub-menu item Description
Send Fax Later Send Fax time
Reprint Last Prints the received faxes stored in the available memory.
Polling Receive Allows the product to call another fax machine that has polling
Clear Saved Faxes Clears all faxes stored in the available memory.
Reports menu
In the following table, items that have an asterisk (*) indicate the factory default setting.
Table 2-14 Reports menu (LCD control panel)
First level Sub-menu item Sub-menu item Description
Demo Page Prints a page that demonstrates print quality.
Fax Reports Fax Confirmation On Every Fax*
Allows a fax to be sent at a later time and date.
Send Fax date
send enabled.
Sets whether the product prints a confirmation
report after a successful fax job.
On Send Fax Only
On Receive Fax Only
Never
Fax Error Report On Every Error*
On Send Error
On Receive Error
Never
Last Call Report On*
Off
Include 1st Page On*
Off
Fax Activity log Print Log Now
Auto Log Print
PhoneBook Report Prints a list of the speed dials that have been set up
Block Fax list Prints a list of phone numbers that are blocked
All fax reports Prints all fax-related reports.
Menu Structure Prints a control-panel menu layout map.
Sets whether the product prints a report after a
failed fax job.
Prints a detailed report of the last fax operation,
either sent or received.
Sets whether the product includes a thumbnail
image of the first page of the fax on the report.
Print Log Now: Prints a list of the faxes that have
been sent from or received by this product.
Auto Log Print: Automatically prints a report after
every fax job.
for this product.
from sending faxes to this product.
70 Chapter 2 Solve problems ENWW
Table 2-14 Reports menu (LCD control panel) (continued)
First level Sub-menu item Sub-menu item Description
Config Report Prints a list of the product settings.
Supplies Status Prints the toner cartridge status. Includes the
Usage Report Displays the number of pages printed, faxed,
Fax Setup menu
In the following table, items that have an asterisk (*) indicate the factory default setting.
Table 2-15 Fax Setup menu (LCD control panel)
Menu item Sub-menu item Sub-menu item Description
Fax Header Sets the identifying information that is sent to the
following information:
●
Approximate pages remaining
●
Supply level
●
Serial number
●
Number of pages printed
●
First install date
●
Last used date
copied, and scanned by the product.
receiving product.
Phone Book Add/Edit Adds or edits the fax phone book speed dial entries.
Delete Deletes a specific phone book entry.
Delete All Deletes all entries in the phone book.
Fax Send Setup Def. Resolution Standard
Fine*
Superfine
Photo
Def. Light/Dark Sets the default darkness for outgoing faxes.
Def. Glass Size Letter*
A4
Dialing Mode Tone*
Pulse
Redial if Busy On*
Off
Sets the default resolution for sent documents.
Higher resolution images have more dots per inch
(dpi), so they show more detail. Lower resolution
images have fewer dots per inch and show less
detail, but the file size is smaller and the fax takes
less time to transmit.
Sets the default paper size for documents being
scanned from the flatbed scanner.
NOTE: The default setting is determined by the
choice of location during the initial product setup.
Sets whether the product should use tone or pulse
dialing.
Sets whether the product should attempt to redial if
the line is busy.
ENWW Tools for troubleshooting 71
Table 2-15 Fax Setup menu (LCD control panel) (continued)
Menu item Sub-menu item Sub-menu item Description
Redial if No Answer On
Off*
Redial if Comm Error On*
Off
Dial Prefix On
Off*
Detect Dial Tone On*
Off
Fax Recv. Setup Answer Mode Automatic*
Manual
TAM
Fax/Tel
Sets whether the product should attempt to redial if
the recipient fax number does not answer.
Sets whether the product should attempt to redial
the recipient fax number if a communication error
occurs.
Specifies a prefix number that must be dialed when
sending faxes from the product.
Sets whether the product should check for a dial
tone before sending a fax.
Sets the type of answer mode. The following
options are available:
●
Automatic: The product automatically
answers an incoming call on the configured
number of rings.
●
Manual: The user must touch the Start Fax
button or use an extension phone number to
make the product answer the incoming call.
●
TAM: A telephone answering machine (TAM) is
attached to the Auxiliary phone port of the
product. The product will not pick up any
incoming call, but will listen for fax tones after
the answering machine has picked up the call.
●
Fax/Tel: The product must automatically pick
up the call and determine if the call is a voice
or fax call. If the call is a fax call, the product
handles the call as usual. If the call is a voice
call, an audible synthesized ring is generated
to alert the user of an incoming voice call.
Rings to Answer Sets the number of rings that must occur before the
Answer Ring Type All Rings*
Single
Double
Triple
Double&Triple
fax modem answers. The default setting is 5.
If you have distinctive ring phone service, use this
item to configure how the product responds to
incoming calls.
●
All Rings: The product answers any calls that
come through the telephone line.
●
Single: The product answers any calls that
produce a single-ring pattern.
●
Double: The product answers any calls that
produce a double-ring pattern.
●
Triple: The product answers any calls that
produce a triple-ring pattern.
●
Double and Triple: The product answers any
calls that produce a double-ring or triple-ring
pattern.
72 Chapter 2 Solve problems ENWW
Table 2-15 Fax Setup menu (LCD control panel) (continued)
Menu item Sub-menu item Sub-menu item Description
Extension Phone On*
Off
Silence Detect On
Off*
Fit to Page On*
Off
Stamp Faxes On
Off*
Forward Fax On
Off*
Block Junk Faxes Add entry
Delete entry
Clear all
Reprint Faxes On*
Off
When this feature is enabled, the 1-2-3 buttons on
the extension phone may be pressed to cause the
product to answer an incoming fax call.
Controls whether or not the product can receive
faxes from older model fax machines that do not
emit the initial CNG tones during the fax
transmission.
Shrinks incoming faxes that are larger than the
paper size set for the tray.
Sets the product to print the date, time, sender's
phone number, and page number on each page of
incoming faxes.
Sets product to send all received faxes to another
fax machine.
Modifies the junk fax list. The junk fax list can
contain up to 30 numbers. When the product
receives a call from one of the junk fax numbers, it
deletes the incoming fax. It also logs the junk fax in
the activity log along with job accounting
information.
Sets whether incoming faxes are stored in memory
for reprinting later.
Private Receive On
Print faxes
Off*
F/T Ring Time Sets the time, in seconds, after which the product
All Faxes Error Correction On*
Off
Fax Speed Fast(V.34)*
Medium(V.17)
Slow(V.29)
Setting Private receive to On requires you to set a
product password. After setting the password, the
following options are set:
●
Private receive is turned on.
●
All old faxes are deleted from memory.
●
Fax forwarding is set to Off and is not allowed
to be changed.
●
All incoming faxes are stored in memory.
should stop sounding the Fax/Tel audible ring to
notify the user of an incoming voice call. The
default setting is 20 seconds.
Allows the sending device to re-transmit data if it
detects an error signal.
Sets the allowed fax communication speed.
ENWW Tools for troubleshooting 73
System Setup menu
In the following table, items that have an asterisk (*) indicate the factory default setting.
Table 2-16 System Setup menu (LCD control panel)
Menu item Sub-menu item Sub-menu item Description
Language (Lists available control-
panel display
languages.)
Paper Setup Def. Paper Size Letter
Def. Paper Type (Lists available media
Print Density Determines how much toner to apply to thicken
Energy Settings Sleep/Auto Off after 5 Minutes
Wake/Auto On Events Button Press
Sets the language in which the control panel
A4
Legal
types.)
15 Minutes
30 Minutes
60 Minutes
USB Job
LAN Job
displays messages and product reports.
Sets the default paper size for printing internal
reports, faxes, or any print job that does not specify
a size.
Sets the default paper type for printing internal
reports, faxes, or any print job that does not specify
a type.
lines and edges.
Specifies the amount of idle time before the product
enters sleep mode.
Select the events that bring the product out of sleep
mode.
Wireless Job
Fax
Auto Off/Manual On
after
Volume Settings Alarm Volume
Ring Volume
Key-Press Volume
Phoneline Volume
Time/Date Sets the time and date setting for the product.
Never
2 Hours
4 Hours
8 Hours
Set the volume levels for the product. The following
Set the amount of elapsed time before the product
turns itself off.
options are available for each volume setting:
●
Off
●
Soft*
●
Medium
●
Loud
74 Chapter 2 Solve problems ENWW
Table 2-16 System Setup menu (LCD control panel) (continued)
Menu item Sub-menu item Sub-menu item Description
Supply Settings Black Cartridge Very Low Setting
Low Threshold Enter a percentage for the low threshold setting.
Store Usage Data Not on Supplies*
On Supplies
●
Stop: The product stops printing until you
replace the toner cartridge.
●
Prompt: The product stops printing and
prompts you to replace the toner cartridge.
You can acknowledge the prompt and
continue printing.
●
Continue*: The product alerts you that the
toner cartridge is very low, but it continues
printing.
Select where to store the product's usage data,
either on the supplies or not on the supplies.
ENWW Tools for troubleshooting 75
Service menu
In the following table, items that have an asterisk (*) indicate the factory default setting.
Table 2-17 Service menu (LCD control panel)
Menu item Sub-menu item Description
T.30 Trace Never*
If Error
At End of Call
Now
Restore Defaults Sets all settings to the factory default values.
Cleaning Mode Cleans the product when specks or other marks appear on printed
Less Paper Curl On*
Off
USB Speed High*
Full
Archive Print Off*
On
Prints or schedules a report that is used to troubleshoot fax
transmission issues.
output. The cleaning process removes dust and excess toner from
the paper path.
When selected, the product prompts you to load plain Letter or
A4 paper in the input tray. Press the OK button to begin the
cleaning process. Wait until the process completes. Discard the
page that prints.
When printed pages are consistently curled, this option sets the
product to a mode that reduces curl.
Sets the USB speed for the USB connection to the computer. For
the product to actually operate at high speed, it must have high
speed enabled and be connected to an EHCI host controller that is
also operating at high speed. This menu item does not reflect the
current operating speed of the product.
When printing pages that will be stored for a long time, this
option sets the product to a mode that reduces toner smearing
and dusting.
Run Fax Test Performs a fax test to verify that the phone cord is plugged in the
Signature c heck Cancel if bad
Prompt if bad
correct outlet and that there is a signal on the phone line. A fax
test report is printed indicating the results.
Validates HP firmware downloads.
Network Setup menu
In the following table, items that have an asterisk (*) indicate the factory default setting.
Table 2-18 Network Setup menu (LCD control panel)
Menu item Sub-menu item Description
Wireless Menu Wireless Direct Manage the product's wireless direct settings.
Wireless Radio Enables or disables the wireless radio feature.
Network Test Tests the wireless network and prints a report with the results.
WPS Setup Choose the method of connecting to the router, either push
button or PIN.
76 Chapter 2 Solve problems ENWW
Table 2-18 Network Setup menu (LCD control panel) (continued)
Menu item Sub-menu item Description
Copy menu
TCP/IP Config Automatic*
Manual
Network Services IPv4
IPv6
Show IP address Displays the product IP address.
Link Speed Automatic*
10T Full
10T Half
100TX Full
100TX Half
Restore Defaults Resets all network configurations to their factory defaults.
Automatic: The product automatically configures all the TCP/IP
settings via DHCP, BootP or AutoIP.
Manual: You can manually configure the IP address, subnet mask,
and default gateway. The control panel prompts you to specify
values for each address section. As each address is completed,
the product prompts for address confirmation before moving to
the next one. After all three addresses are set, the network
reinitializes.
Enable or disable the IPv4 and IPv6 protocols. By default, each
protocol is enabled.
Sets the link speed manually if needed.
After setting the link speed, the product automatically restarts.
To open this menu, press the Copy Menu
items, press the Copy Menu
button again.
button on the product control panel. To scroll between the menu
In the following table, items that have an asterisk (*) indicate the factory default setting.
Table 2-19 Copy menu (LCD control panel)
Menu item Sub-menu item Description
ID Copy Use this menu to copy both sides of identification cards, or other
small-size documents, onto the same side of one sheet of paper.
Reduce/Enlarge Original=100%*
A4 to Letter=94%
Letter to A4=97%
Full Page=91%
2 Pages per Sheet
4 Pages per Sheet
Custom: 25 to 400%
Specifies the size of the copy.
ENWW Tools for troubleshooting 77
Table 2-19 Copy menu (LCD control panel) (continued)
Menu item Sub-menu item Description
Optimize Mixed
Text*
Picture
Draft
Paper Paper Size
Paper Type
Collation On
Off*
Set as Defaults Saves any changes you have made to this menu as the new
Restore Defaults Restores the factory defaults for this menu.
Specifies the type of content in the original document, so the
copy is the best match for the original.
Specify the paper size and type in the input tray.
Specifies whether to collate copy jobs.
defaults.
78 Chapter 2 Solve problems ENWW
Interpret control-panel messages
Control-panel message types
Alert and warning messages appear temporarily and might require you to acknowledge the message by
pressing the OK button to resume or by pressing the Cancel
warnings, the job might not complete or the print quality might be affected. If the alert or warning message is
related to printing and the auto-continue feature is on, the product will attempt to resume the printing job
after the warning has appeared for 10 seconds without acknowledgement.
Critical error messages can indicate some kind of failure. Turning off and then turning on the power might fix
the problem. If a critical error persists, the product might require service.
Control-panel messages
Table 2-20 Control-panel messages
Control panel message Description Recommended action
button to cancel the job. With certain
22 Scanner Error The product has experienced an internal
50.X Fuser Error
Turn off then on
52 Scanner Error
Turn off then on
hardware error.
The product has experienced an internal
hardware error.
The product has experienced a scanner error. Turn off the power by using the power switch,
1. Check all of the FFC connections.
2. Verify that the scanner-carriage can move
along the track in the scanner assembly,
and that the scanner motor can rotate.
3. If the error persists, replace the FFC cable.
4. If the error persists, replace the scanner
motor or the scanner carriage.
5. If the error persists, replace the
formatter.
1. Turn off the power by using the power
switch, and then wait at least 30 seconds.
2. If a surge protector is being used, remove
it. Plug the product directly into the wall
socket.
3. Turn on the power and wait for the
product to initialize.
4. If the error persists, replace the fuser.
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, replace the scanner
assembly.
ENWW Tools for troubleshooting 79
Table 2-20 Control-panel messages (continued)
Control panel message Description Recommended action
Comm. error A fax communication error occurred between
Device error
Press [OK]
Door open The toner-cartridge door is open. Close the door.
Fax delayed
Send memory full
Fax is busy
Canceled send
the product and the sender or receiver.
The product experienced an internal
communication error.
Fax memory is full.
The fax line to which you were sending a fax
was busy. The product has canceled sending
the fax.
Allow the product to retry sending the fax.
Unplug the product telephone cord from the
wall, plug in a telephone, and try making a call.
Plug the product phone cord into a jack for
another phone line.
Try a different phone cord.
If the error persists, replace the fax PCA.
This is a warning message only. Job output
might be affected.
Cancel the fax by pressing the Cancel
button. Resend the fax. You might need to send
the fax in multiple sections if the error occurs
again.
Call the recipient to ensure that the fax
machine is on and ready.
Check that you are dialing the correct fax
number.
Check that the Redial if busy option is enabled.
Check for a dial tone on the phone line by
pressing the Start Fax
control panels or by touching the Fax button on
touchscreen control panels.
button on LCD
Make sure that the phone line is working by
disconnecting the product, connecting a
telephone to the phone line, and making a
voice call.
Connect the product phone cord to a jack for
another phone line, and then try sending the
fax again.
Try a different phone cord.
If the error persists, replace the fax PCA.
80 Chapter 2 Solve problems ENWW
Table 2-20 Control-panel messages (continued)
Control panel message Description Recommended action
Fax is busy
Redial pending
Fax memory full
Canceling recv.
The fax line to which you were sending a fax
was busy. The product automatically redials
the busy number.
During the fax transmission, the product ran
out of memory. Only the pages that fit into
memory will be printed.
Allow the product to retry sending the fax.
Call the recipient to ensure that the fax
machine is on and ready.
Check that you are dialing the correct fax
number.
Check for a dial tone on the phone line by
pressing the Start Fax
control panels or by touching the Fax button on
touchscreen control panels.
Make sure that the phone line is working by
disconnecting the product, connecting a
telephone to the phone line, and making a
voice call.
Connect the product phone cord to a jack for
another phone line, and then try sending the
fax again.
Try a different phone cord.
If the error persists, replace the fax PCA.
Print all of the faxes, and then have the sender
resend the fax. Have the sender divide the fax
job into multiple jobs before resending. Cancel
all fax jobs or clear the faxes from memory.
button on LCD
Fax memory full
Canceling send
During the fax job, the memory filled. All pages
of the fax have to be in memory for a fax job to
work correctly. Only the pages that fit into
memory were sent.
Print all received faxes or wait until all pending
faxes are sent.
Ask the sender to send the fax again.
Cancel all fax jobs or clear the faxes from
memory.
ENWW Tools for troubleshooting 81
Table 2-20 Control-panel messages (continued)
Control panel message Description Recommended action
Fax recv. error An error occurred while trying to receive a fax. Ask the sender to resend the fax.
Try faxing back to the sender or another fax
machine.
Check for a dial tone on the phone line by
pressing the Start Fax
control panels or by touching the Fax button on
touchscreen control panels.
Check that the telephone cord is securely
connected by unplugging and replugging the
cord.
Make sure that you are using the telephone
cord that came with the product.
Make sure that the phone line is working by
disconnecting the product, connecting a
telephone to the phone line, and making a
voice call.
Decrease the fax speed. Ask the sender to
resend the fax.
Turn off error-correction mode. Ask the sender
to resend the fax.
button on LCD
Connect the product to a different phone line.
If the error persists, replace the fax PCA.
Fax Send error An error occurred while trying to send a fax. Try resending the fax.
Try faxing to another fax number.
Check for a dial tone on the phone line by
pressing the Start Fax
control panels or by touching the Fax button on
touchscreen control panels.
Check that the telephone cord is securely
connected by unplugging and replugging the
cord.
Make sure that you are using the telephone
cord that came with the product.
Make sure that the phone line is working by
disconnecting the product, connecting a
telephone to the phone line, and making a
voice call.
Connect the product to a different phone line.
Set the fax resolution to Standard instead of
the default of Fine.
button on LCD
If the error persists, replace the fax PCA.
82 Chapter 2 Solve problems ENWW
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