HP m701, m706 Troubleshooting Manual
LaserJet Pro M701/M706
Troubleshooting Manual
LaserJet Pro M706n
www.hp.com/support/ljM701
www.hp.com/support/ljM706
HP LaserJet Pro M701/M706
Troubleshooting Manual
Copyright and License
© 2014 Copyright Hewlett-Packard
Development Company, L.P.
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The information contained herein is subject to
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as constituting an additional warranty. HP shall
not be liable for technical or editorial errors or
omissions contained herein.
Edition 1, 02/2014
Part number: B6S00-90904
Microsoft®, Windows®, Windows® XP, and
Windows Vista® are U.S. registered trademarks
of Microsoft Corporation.
ENERGY STAR and the ENERGY STAR mark are
registered U.S. marks.
Conventions used in this guide
TIP: Tips provide helpful hints or shortcuts.
NOTE: Notes provide important information to explain a concept or to complete a task.
CAUTION: Cautions indicate procedures that you should follow to avoid losing data or damaging the
product.
WARNING! Warnings alert you to specific procedures that you should follow to avoid personal injury,
catastrophic loss of data, or extensive damage to the product.
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iv Conventions used in this guide ENWW
Table of contents
1 Theory of operation ....................................................................................................................................... 1
Basic operation ...................................................................................................................................................... 2
Major systems ..................................................................................................................................... 2
Product block diagram ........................................................................................................................ 2
Engine control system ........................................................................................................................................... 3
DC controller ........................................................................................................................................ 4
Low-voltage power supply (LVPS) ...................................................................................................... 5
Overcurrent/overvoltage protection ................................................................................ 7
Fuser control ....................................................................................................................................... 9
Fuser-heater protective function ................................................................................... 12
Fuser control functions ................................................................................................... 13
2 Solve problems ........................................................................................................................................... 15
Solve problems checklist ..................................................................................................................................... 16
Menu map ............................................................................................................................................................ 17
Troubleshooting process .................................................................................................................................... 18
Pre-troubleshooting checklist .......................................................................................................... 18
Determine the problem source ......................................................................................................... 20
Troubleshooting flowchart ............................................................................................. 20
Power subsystem .............................................................................................................................. 21
Power-on checks ............................................................................................................ 21
Power-on troubleshooting overview ........................................................... 21
Control panel checks ......................................................................................................................... 22
Tools for troubleshooting ................................................................................................................................... 23
Engine self-test ................................................................................................................................. 23
Troubleshooting process for product not turning on ...................................................................... 23
Diagrams ........................................................................................................................................... 24
Block diagrams ............................................................................................................... 24
Location of connectors ................................................................................................... 25
DC controller connections ............................................................................ 25
Paper feed driver PCA connections .............................................................. 26
Duplex driver PCA connections ....................................................................................... 27
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Plug and port locations ................................................................................................... 28
Locations of major assemblies ....................................................................................... 29
Switch locations .............................................................................................................. 32
Sensor locations ............................................................................................................. 33
500-sheet paper feeder accessory ................................................................................ 34
Duplex unit ...................................................................................................................... 35
General timing chart ....................................................................................................... 37
Circuit diagrams .............................................................................................................. 38
Use HP Device Toolbox (Windows) ................................................................................................... 40
Internal print-quality test pages ...................................................................................................... 41
Clean the paper path ....................................................................................................... 41
Print the configuration page .......................................................................................... 41
Print quality troubleshooting tools .................................................................................................. 42
Repetitive defects ruler .................................................................................................. 42
Control panel menus ......................................................................................................................... 43
Setup Menu ..................................................................................................................... 43
HP Web Services ........................................................................................... 43
Reports menu ............................................................................................... 44
System Setup menu ..................................................................................... 45
Service menu ................................................................................................ 47
Network Setup menu .................................................................................... 49
Quick Forms menu ........................................................................................ 50
Interpret control panel messages .................................................................................................... 51
Control panel message types ......................................................................................... 51
Control panel messages ................................................................................................. 51
Rear door open ............................................................................................. 51
49 Error, Turn off then on ............................................................................ 51
50.x Fuser Error ............................................................................................ 51
51.XX Error ................................................................................................... 52
54.XX Error ................................................................................................... 52
55.X Error ...................................................................................................... 52
57 Fan Error, Turn off then on ..................................................................... 52
59.X Error ...................................................................................................... 53
79 Error Turn off then on ............................................................................. 53
Black Cartridge Low ...................................................................................... 53
Black Very Low ............................................................................................. 53
Cleaning ........................................................................................................ 54
Device error, press OK .................................................................................. 54
Front door open ............................................................................................ 54
Genuine HP supply installed ........................................................................ 54
Invalid driver Press OK ................................................................................. 54
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Jam in Tray 1, Clear jam and then press OK ................................................. 54
Load Tray 1 Press OK for available media ................................................... 55
Load Tray 1 <TYPE> <SIZE>, Press OK to use available media ................... 55
Load Tray 1, <PLAIN> <SIZE> / Cleaning mode, OK to start ........................ 55
Manual Duplex Load Tray 1, Press OK ......................................................... 55
Manual feed <SIZE> <TYPE>, Press OK to use available media .................. 55
Memory is low. Press OK. ............................................................................. 56
Misprint, Press OK ........................................................................................ 56
Print failure, press OK. If error repeats, turn off then on. ........................... 56
Tray 1 <size> press [OK] to modify .............................................................. 56
Unexpected size in Tray 1 Load <size> Press OK ......................................... 57
Event-log messages .......................................................................................................................... 57
Print the event log .......................................................................................................... 57
Show an event log ........................................................................................................... 57
Event log messages ........................................................................................................ 57
Clear jams ............................................................................................................................................................ 60
Jam locations .................................................................................................................................... 60
Experiencing frequent or recurring paper jams? .............................................................................. 60
Clear jams in Tray 1 ........................................................................................................................... 61
Clear jams in Tray 2 ........................................................................................................................... 63
Clear jams in Tray 3 (M706n model only) ......................................................................................... 67
Clear jams in the toner-cartridge area ............................................................................................. 70
Clear jams in the rear door and fuser area ....................................................................................... 72
Clear jams in the output bin .............................................................................................................. 74
Clear jams in the optional duplexer (M706n model only) ................................................................ 76
Paper feeds incorrectly or becomes jammed ..................................................................................................... 77
The product does not pick up paper ................................................................................................. 77
The product picks up multiple sheets of paper ................................................................................ 77
Prevent paper jams from the paper trays ........................................................................................ 77
Solve image-quality problems ............................................................................................................................ 79
Image defect examples ..................................................................................................................... 79
Clean the product ................................................................................................................................................ 86
Clean the pickup and separation rollers ........................................................................................... 86
Clean the paper path ......................................................................................................................... 86
Solve performance problems .............................................................................................................................. 87
Solve connectivity problems ............................................................................................................................... 88
Solve USB connection problems ....................................................................................................... 88
Solve wired network problems ......................................................................................................... 88
Poor physical connection ................................................................................................ 88
The computer is using the incorrect IP address for the product ................................... 88
The computer is unable to communicate with the product ........................................... 89
ENWW vii
The product is using incorrect link and duplex settings for the network ...................... 89
New software programs might be causing compatibility problems ............................. 89
The computer or workstation might be set up incorrectly ............................................ 89
The product is disabled, or other network settings are incorrect ................................. 89
Service mode functions ....................................................................................................................................... 90
Service menu ..................................................................................................................................... 90
Service menu settings .................................................................................................... 90
Restore the factory-set defaults .................................................................................... 90
Secondary service menu ................................................................................................................... 90
Open the secondary service menu ................................................................................. 90
Secondary service menu structure ................................................................................. 91
Product resets ................................................................................................................................... 92
NVRAM initialization ....................................................................................................... 92
Super NVRAM initialization ............................................................................................. 92
Product updates .................................................................................................................................................. 94
Manually update the firmware ......................................................................................................... 94
Set the product to automatically update the firmware ................................................................... 94
Appendix A Service and support ...................................................................................................................... 95
Hewlett-Packard limited warranty statement ................................................................................................... 96
HP's Premium Protection Warranty: LaserJet toner cartridge limited warranty statement ............................. 97
HP policy on non-HP supplies ............................................................................................................................. 98
HP anticounterfeit Web site ................................................................................................................................ 99
Data stored on the toner cartridge ................................................................................................................... 100
End User License Agreement ............................................................................................................................ 101
OpenSSL ............................................................................................................................................................. 103
Customer self-repair warranty service ............................................................................................................. 104
Customer support .............................................................................................................................................. 105
Appendix B Product specifications ................................................................................................................. 107
Physical specifications ...................................................................................................................................... 108
Power consumption, electrical specifications, and acoustic emissions .......................................................... 108
Environmental specifications ............................................................................................................................ 108
Appendix C Regulatory information ............................................................................................................... 109
FCC regulations .................................................................................................................................................. 110
Environmental product stewardship program ................................................................................................. 111
Protecting the environment ........................................................................................................... 111
Ozone production ............................................................................................................................ 111
Power consumption ........................................................................................................................ 111
viii ENWW
Toner consumption ......................................................................................................................... 111
Paper use ......................................................................................................................................... 111
Plastics ............................................................................................................................................ 112
HP LaserJet print supplies .............................................................................................................. 112
Return and recycling instructions ................................................................................................... 112
United States and Puerto Rico ...................................................................................... 112
Multiple returns (more than one cartridge) ............................................... 112
Single returns ............................................................................................. 112
Shipping ...................................................................................................... 112
Non-U.S. returns ........................................................................................................... 113
Paper ............................................................................................................................................... 113
Material restrictions ........................................................................................................................ 113
Disposal of waste equipment by users ........................................................................................... 11 3
Electronic hardware recycling ........................................................................................................ 113
Chemical substances ....................................................................................................................... 114
Material Safety Data Sheet (MSDS) ................................................................................................ 114
EPEAT .............................................................................................................................................. 114
For more information ...................................................................................................................... 114
Declaration of conformity ................................................................................................................................. 115
Declaration of conformity ................................................................................................................................. 117
Certificate of Volatility ...................................................................................................................................... 119
Safety statements ............................................................................................................................................. 121
Laser safety ..................................................................................................................................... 121
Canada - Industry Canada ICES-003 Compliance Statement ......................................................... 121
VCCI statement (Japan) ................................................................................................................... 121
Power cord instructions .................................................................................................................. 121
Power cord statement (Japan) ....................................................................................................... 121
EMC statement (China) .................................................................................................................... 121
EMC statement (Korea) ................................................................................................................... 122
EMI statement (Taiwan) .................................................................................................................. 122
Laser statement for Finland ........................................................................................................... 122
GS statement (Germany) ................................................................................................................ 123
Substances Table (China) ................................................................................................................ 123
SEPA Ecolabel User Information (China) ........................................................................................ 123
Restriction on Hazardous Substances statement (Turkey) ........................................................... 123
Restriction on Hazardous Substances statement (Ukraine) .......................................................... 124
Eurasian Conformity (Belarus, Kazakhstan, Russia) ...................................................................... 124
Index ........................................................................................................................................................... 125
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List of tables
Table 1-1 Sequence of operation ......................................................................................................................................... 3
Table 1-2 DC controller components ................................................................................................................................... 4
Table 1-3 Low-voltage power supply .................................................................................................................................. 7
Table 1-4 Low-voltage power supply functions. ................................................................................................................. 7
Table 1-5 Fuser control components ................................................................................................................................. 10
Table 1-6 Fuser control functions ...................................................................................................................................... 13
Table 2-1 Troubleshooting flowchart ................................................................................................................................ 20
Table 2-2 Control panel 2ndary Service test access buttons ............................................................................................ 22
Table 2-3 Plug and port locations ...................................................................................................................................... 28
Table 2-4 Event-log messages .......................................................................................................................................... 57
Table 2-5 Event-log-only messages .................................................................................................................................. 58
Table 2-6 Image defect examples ...................................................................................................................................... 79
Table 2-7 Solve performance problems ............................................................................................................................ 87
Table 2-8 Control panel 2ndary Service test access buttons ............................................................................................ 91
Table 2-9 Secondary Service menu .................................................................................................................................... 91
Table B-1 Physical specifications ..................................................................................................................................... 108
Table B-2 Operating-environment specifications ........................................................................................................... 108
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xii ENWW
List of figures
Figure 1-1 Product block diagram ........................................................................................................................................ 2
Figure 1-2 Engine control system ........................................................................................................................................ 3
Figure 1-3 DC controller ....................................................................................................................................................... 4
Figure 1-4 Low voltage power supply .................................................................................................................................. 6
Figure 1-5 Fuser components .............................................................................................................................................. 9
Figure 1-6 Fuser control system ........................................................................................................................................ 11
Figure 2-1 Control panel 2ndary Service test access buttons ........................................................................................... 22
Figure 2-2 Product cross section ........................................................................................................................................ 24
Figure 2-3 DC controller connections ................................................................................................................................. 25
Figure 2-4 Paper feed driver connections .......................................................................................................................... 26
Figure 2-5 Duplex driver PCA connections ......................................................................................................................... 27
Figure 2-6 External assembly locations ............................................................................................................................ 29
Figure 2-7 PCA locations ..................................................................................................................................................... 30
Figure 2-8 Motor locations ................................................................................................................................................. 31
Figure 2-9 Fan assembly locations .................................................................................................................................... 31
Figure 2-10 Solenoid component locations ....................................................................................................................... 32
Figure 2-11 Switch locations .............................................................................................................................................. 32
Figure 2-12 Sensor locations ............................................................................................................................................. 33
Figure 2-13 500-sheet paper feeder accessory ................................................................................................................ 34
Figure 2-14 Duplex unit ...................................................................................................................................................... 35
Figure 2-15 General timing chart ....................................................................................................................................... 37
Figure 2-16 General circuit diagram ................................................................................................................................... 38
Figure 2-17 500-sheet paper feeder .................................................................................................................................. 38
Figure 2-18 Duplex unit ...................................................................................................................................................... 39
Figure 2-19 Repetitive defects ruler .................................................................................................................................. 42
Figure 2-20 Control panel 2ndary Service test access buttons ......................................................................................... 91
Figure C-1 Certificate of Volatility (1 of 2) ....................................................................................................................... 119
Figure C-2 Certificate of Volatility (2 of 2) ....................................................................................................................... 120
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xiv ENWW
1 Theory of operation
This chapter presents an overview of the major components of the HP LaserJet Pro M701/M706 series, and it
includes a detailed discussion of the image-formation system.
ENWW 1
Basic operation
Major systems
The product contains the following systems:
●
Engine-control system
●
Laser/scanner system
●
Image-formation system
●
Paper feed system
●
Accessories
Product block diagram
Figure 1-1 Product block diagram
Laser scanner system
Engine-control system
Image-formation system
Pickup, feed and delivery system
Accessory
2 Chapter 1 Theory of operation ENWW
Engine control system
The engine control system coordinates all product functions and drives the other four systems.
The engine control system contains these components:
●
DC controller printer circuit assembly (PCA)
●
High-voltage power supply PCA
●
Low-voltage power supply unit
●
Fuser control
Figure 1-2 Engine control system
Formatter
Table 1-1 Sequence of operation
Engine-control system
DC controller
Low-voltage power supply
High-voltage power supply
Fuser control
Laser scanner system
Image-formation system
Pickup, feed and delivery
system
Accessory
Period Duration Purpose Remarks
WAIT period From the time the power is
turned on until the initial drive
for the main motor is complete
STBY (Standby period) From end of the WAIT or LSTR
period until either the print
command is received from the
formatter or the power is
turned off
INTR (Initial rotation) From the time the print
command is received until the
pickup solenoid is turned on
Removes the charge that
creates a potential difference
from the drum surface, and
adjusts the drum phase
Maintains the product in
readiness for a print command
and maintains the heater at a
targeted temperature
Prepares the photosensitive
drum for printing and cleans
the transfer charging roller
Detects cartridge presence
ENWW Engine control system 3
Table 1-1 Sequence of operation (continued)
Period Duration Purpose Remarks
PRINT From the end of INTR period
LSTR (Last rotation) From the end of the PRINT
DC controller
Figure 1-3 DC controller
Fuser
until the fuser paper sensor
detects the trailing edge of
paper
period until the fuser motor
stops rotating
AC
input
Low-voltage
power supply
Forms the images on the
photosensitive drum and
transfers the toner image to
the print media
Moves the last printed sheet
out of the product
The product enters the INTR
period as soon as the formatter
sends another print command
Motor
Fan
Solenoid
Transfer roller
High-voltage
power supply
Cartridge
LED
Static charge
eliminator
Control panel
Formatter
Table 1-2 DC controller components
Component type Abbreviation Component name
Motor M1 Drum motor
M2 Fuser motor
Photointerrupter
Sensor
DC controller
Switch
Duplex unit
Input accessory
Laser scanner ass’y
M3 Scanner motor
4 Chapter 1 Theory of operation ENWW
Table 1-2 DC controller components (continued)
Component type Abbreviation Component name
Fan FM1 Main fan
FM2 Sub fan
Solenoid SL1 Cassette pickup solenoid
SL2 MP tray pickup solenoid
Switch SW1 Front interlock switch
SW2 Rear interlock switch
SW3 Cassette-presence switch
SW4 Cartridge door open detection switch
Photointerruptor PS1 TOP sensor
PS2 Loop sensor
PS3 Fuser delivery sensor
PS4 Delivery tray paper-full sensor
PS5 Cassette paper-presence sensor
PS6 MP tray paper-presence sensor
Sensor Environment sensor
Low-voltage power supply (LVPS)
The low-voltage power supply (LVPS) converts AC input voltage to DC voltage. The LVPS has two fuses on the
PCA. The LVPS 24 V output is interrupted to the fuser and the high-voltage power supply if the cartridge-door
interlock switch (SW501) is in the off position (cover open).
WARNING! The product power switch only interrupts DC voltage from the LVPS. The AC voltage is present in
the product when the power cable is plugged into a power receptacle and the power switch is in the off
position. You must disconnect the product power cable before servicing the product.
ENWW Engine control system 5
Figure 1-4 Low voltage power supply
AC input
Rectifying
circuit
Low-voltage power supply DC controller
Fuse
FU1
Zerocross
circuit
+3.3V
generation
circuit
High-voltage power supply
High-voltage
circuit
Fuser circuit
/ZEROX
+3.3VA
+3.3VA
+3.3VC
Interlock switch
SW2
+24VC
Formatter
Protection
circuit
+24V
generation
circuit
+3.3VA
+24VA
+24VA
RMT_24V
+24VB
+24VB
+24VA
Interlock switch
SW1
6 Chapter 1 Theory of operation ENWW
Table 1-3 Low-voltage power supply
Main DC voltage Sub-
voltage
+ 24V + 24VA
+ 24VB
+ 24VC
+ 3.3V + 3.3VA
+ 3.3VB
+ 3.3VC
Behavior
●
Constantly supplied
●
Stopped during Sleep mode
●
Interrupted when the rear door open
●
Stopped during Sleep mode
●
Interrupted when the cartridge door open
●
Stopped during Sleep mode
●
Constantly supplied
●
Constantly supplied
●
Constantly supplied
●
Stopped during Sleep mode
Table 1-4 Low-voltage power supply functions.
Function Applied
Sleep mode V
Power supply voltage detection N/A
Automatic power OFF V
Automatic power ON/OFF N/A
Active OFF V
Inactive OFF V
Network mode N/A
Power switch illumination V
Low-voltage power supply failure detection V
Power save mode N/A
Overcurrent/overvoltage protection
The low-voltage power supply has a protective function against overcurrent and overvoltage to prevent
failures in the power supply circuit. If the DC power is not being supplied from the low-voltage power supply,
the protective function might be running. In that case, turn off the power switch and disconnect the power
cable. Do not connect the power cable or turn on the power switch again until the cause is found.
If the DC power is not being supplied from the low-voltage power supply, the protective function might be
running. In that case, turn off the power switch and disconnect the power cable. Do not connect the power
cable or turn on the power switch again until the cause is found.
ENWW Engine control system 7
WARNING! If you believe the overcurrent or overvoltage protection circuits have been activated, do not
connect the product power cable or turn on the product power until the cause of the failure is found and
corrected.
In addition, two fuses in the low-voltage power supply protect against overcurrent. If overcurrent flows into
the AC line, the fuses melt and cut off the power distribution.
For safety reasons, the product interrupts power (24 V) to the main motor and high-voltage power supply.
The interlock switch is turned off to interrupt power when the cartidge door opens (SW260 is turned off). The
AC voltage remains present in the product when the power switch is in the off position. Disconnect the power
cable when disassembling the product.
NOTE: An accidental electrical short while servicing the product can result in a loss of power to the product
causing the control panel to shut down (blank out). Turn the product power off, and then unplug the power
cable. Wait at least 15 minutes before plugging the power cable in and turning the product power on.
8 Chapter 1 Theory of operation ENWW
Fuser control
The fuser-heater control circuit and the fuser-heater safety circuit control the fuser temperature according
to commands from the DC controller. The product uses an on-demand fusing method.
Figure 1-5 Fuser components
TH4
TH3
TH2
H1/H2
FU1
TH1
FUSER TEMPERATURE signal
FUSER HEATER CONTROL signal
Fuser film
Pressure roller
Fuser heater control circuit
Fuser heater safety circuit
High-voltage power supply
DC controller
ENWW Engine control system 9
Table 1-5 Fuser control components
Component name Function
H1 Fuser main heater Heats the center area of the fuser film
H2 Fuser sub heater Heats the edge of the fuser film
TH1 Main thermistor Detects the center temperature of the fuser heater (contact type)
TH2 Sub thermistor 1 Detects the temperature at one end of the fuser heater (contact type)
TH3 Sub thermistor 2
TH4 Sub thermistor 3
FU1 Thermal fuse Prevents an abnormal temperature rise of the fuser heater (non-contact
type)
10 Chapter 1 Theory of operation ENWW
Figure 1-6 Fuser control system
AC input
RL101
RL102
Fuser heater
control circuit
Fuser heater safety circuit
Low-voltage power supply
Zerocross
circuit
High-voltage power supply
Relay drive circuit
Current
detection
circuit
Fuser control circuit
DC controller
ZEROX
RLD
FSRD1
FSRD2
FSRCUR
MFSRTH
S1FSRTH
S2FSRTH
S3FSRTH
Fuse r
Fuser film ass’y
TH2
FU1
TH3
H1/H2
Pressure roller
TH1
TH4
ENWW Engine control system 11
Fuser-heater protective function
The fuser-heater protective function detects an abnormal temperature rise of the fuser and interrupts the
power supply to the fuser heater. The following protective components prevent an abnormal temperature
rise of the fuser-heater:
●
DC controller
The DC controller monitors the detected temperature of the thermistor. The DC controller deactivates
the FUSER HEATER CONTROL signal and releases the relay (RL1001) to interrupt the power supply to the
fuser heater when it detects an abnormal temperature.
●
Fuser-heater safety circuit
The fuser-heater safety circuit monitors the detected temperature of the thermistor. The fuser-heater
safety circuit releases the relays (RL1001 and RL1002) or deactivates the fuser-heater control circuit to
interrupt the power supply to the fuser-heater when it detects an abnormal temperature.
●
Thermoswitch
The contact of the thermoswitch is broken to interrupt the power supply to the fuser heater when the
temperature of the fuser heater is abnormally high.
●
Current detection circuit
The current detection circuit monitors the current flowing through the fuser heater control circuit. The
current detection circuit releases the relays (RL101, RL102) to interrupt power supply to the fuser
heater when it detects an abnormal current value.
The DC controller deactivates the FUSER HEATER CONTROL signal to interrupt power supply to the fuser
heater when the current of the CURRENT DETECTION signal is higher than a specified value.
12 Chapter 1 Theory of operation ENWW
Fuser control functions
The product has the following fuser control functions.
Table 1-6 Fuser control functions
Function Applied
Fuser temperature control V
Fuser failure detection V
Frequency detection circuit failure detection V
Fuser depressurization mechanism failure detection N/A
Fuser type discrepancy detection N/A
Fuser type identification detection N/A
Fuser presence detection V
Fuser life detection N/A
Relay failure detection N/A
Pressure roller cleaning V
ENWW Engine control system 13
14 Chapter 1 Theory of operation ENWW
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