HP Officejet Enterprise Color X555, Officejet Enterprise Color MFP X585 Repair Manual and Troubleshooting Manual
Officejet Enterprise Color X555
Officejet Enterprise Color MFP X585
Troubleshooting Manual
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www.hp.com/support/ojcolorX555
www.hp.com/support/ojcolorMFPX585
HP Officejet Enterprise Color X555 and MFP
X585 Series
Troubleshooting Manual
Copyright and License
Trademark Credits
© 2014 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.
Edition 1, 4/2014
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
Function structure ............................................................................................................................... 2
Operation sequence ............................................................................................................................ 4
System control ....................................................................................................................................................... 7
Formatter and data path ..................................................................................................................... 7
Engine control ..................................................................................................................................... 8
Pen interface (I/F) .............................................................................................................................. 10
Power supply ..................................................................................................................................... 10
Print subsystem ................................................................................................................................................... 12
Printbar .............................................................................................................................................. 13
Printbar lift ........................................................................................................................................ 14
Ink cartridges ..................................................................................................................................... 15
Optical scan carriage ......................................................................................................................... 15
Print system operational states ....................................................................................................... 15
Paper-handling system ....................................................................................................................................... 17
Input trays ......................................................................................................................................... 24
Paper path zones .............................................................................................................................. 24
Servicing system .................................................................................................................................................. 28
Service sled ....................................................................................................................................... 30
Aerosol management system ............................................................................................................................. 31
Document feeder (X585 models) ........................................................................................................................ 33
Document feeder operation .............................................................................................................. 33
Document feeder paper path and sensors ....................................................................................... 33
Document feeder jam detection ....................................................................................................... 34
Scanner system (X585 models) .......................................................................................................................... 35
Scanner power-on sequence of events ............................................................................................ 35
Copy or scan-to-computer sequence of events ............................................................................... 36
Fax functions and operation (X585 models) ....................................................................................................... 37
Computer and network security features ........................................................................................ 37
PSTN operation ................................................................................................................................. 37
The fax subsystem ............................................................................................................................ 37
ENWW v
Fax card in the fax subsystem .......................................................................................................... 37
Fax page storage in flash memory ................................................................................................... 39
2 Solve problems ........................................................................................................................................... 41
Problem-solving checklist ................................................................................................................................... 42
Step 1: Check that the product power is on ...................................................................................... 42
Step 2: Check the control panel for error messages ........................................................................ 42
Step 3: Test print functionality ......................................................................................................... 43
Step 4: Test copy functionality ......................................................................................................... 43
Step 5: Test the fax sending functionality ........................................................................................ 43
Step 6: Test the fax receiving functionality ...................................................................................... 43
Step 7: Try sending a print job from a computer .............................................................................. 43
Step 8: Test the Plug and Print USB Drive printing functionality ..................................................... 44
Factors that affect product performance ......................................................................................... 44
Troubleshooting process .................................................................................................................................... 45
Determine the problem source ......................................................................................................... 45
Power subsystem .............................................................................................................................. 46
Scanning subsystem (X585) ............................................................................................................. 47
Control panel checks ......................................................................................................................... 47
Tools for troubleshooting ................................................................................................................................... 57
Print the configuration page ............................................................................................................. 57
Event log messages .......................................................................................................................... 59
Error messages ................................................................................................................................. 60
Individual component diagnostics .................................................................................................. 149
Diagrams ......................................................................................................................................... 154
Print-quality troubleshooting tools ............................................................................................... 156
Preboot menu options .................................................................................................................... 164
Control-panel menus ........................................................................................................................................ 172
Administration menu ...................................................................................................................... 172
Device Maintenance menu .............................................................................................................. 233
Solve image quality problems .......................................................................................................................... 236
Clean ink smears ............................................................................................................................. 236
Recover the printhead .................................................................................................................... 236
Solve paper jam or feed problems .................................................................................................................... 237
Product does not pick up paper or misfeeds .................................................................................. 237
Clear jams ........................................................................................................................................ 238
Solve performance problems ............................................................................................................................ 254
The product does not print ............................................................................................................. 254
The product prints slowly ............................................................................................................... 254
Solve connectivity problems ............................................................................................................................. 256
Solve USB direct-connect problems ............................................................................................... 256
vi ENWW
Solve network problems ................................................................................................................. 256
Solve wireless network problems .................................................................................................. 257
Service mode functions ..................................................................................................................................... 262
Service menu and Secondary service menu ................................................................................... 262
Product resets ................................................................................................................................. 262
Solve fax problems ............................................................................................................................................ 263
Fax reports ...................................................................................................................................... 263
Possible fax issues .......................................................................................................................... 266
Product upgrades .............................................................................................................................................. 275
Appendix A Service and support .................................................................................................................... 277
Hewlett-Packard limited warranty statement ................................................................................................. 278
UK, Ireland, and Malta ..................................................................................................................... 279
Austria, Belgium, Germany, and Luxemburg .................................................................................. 279
Belgium, France, and Luxemburg ................................................................................................... 279
Italy .................................................................................................................................................. 281
Spain ................................................................................................................................................ 281
Denmark .......................................................................................................................................... 281
Norway ............................................................................................................................................ 281
Sweden ............................................................................................................................................ 282
Portugal ........................................................................................................................................... 282
Greece and Cyprus ........................................................................................................................... 282
Hungary ........................................................................................................................................... 282
Czech Republic ................................................................................................................................ 282
Slovakia ........................................................................................................................................... 283
Poland ............................................................................................................................................. 283
Bulgaria ........................................................................................................................................... 283
Romania .......................................................................................................................................... 283
Belgium and The Netherlands ........................................................................................................ 283
Finland ............................................................................................................................................. 284
Slovenia ........................................................................................................................................... 284
Croatia ............................................................................................................................................. 284
Latvia ............................................................................................................................................... 284
Lithuania .......................................................................................................................................... 284
Estonia ............................................................................................................................................. 285
End User License Agreement ............................................................................................................................ 286
OpenSSL ............................................................................................................................................................. 288
Customer self-repair warranty service ............................................................................................................. 289
Customer support .............................................................................................................................................. 290
ENWW vii
Appendix B Product specifications ................................................................................................................. 291
Physical specifications (X555 models) ............................................................................................................. 292
Physical specifications (X585 models) ............................................................................................................. 292
Power consumption, electrical specifications, and acoustic emissions .......................................................... 292
Environmental specifications ............................................................................................................................ 292
Appendix C Regulatory information ............................................................................................................... 293
FCC regulations .................................................................................................................................................. 294
Environmental product stewardship program ................................................................................................. 295
Protecting the environment ........................................................................................................... 295
Ozone production ............................................................................................................................ 295
Power consumption ........................................................................................................................ 295
Paper use ......................................................................................................................................... 295
Plastics ............................................................................................................................................ 295
HP Officejet print supplies .............................................................................................................. 295
Return and recycling instructions ................................................................................................... 296
Paper ............................................................................................................................................... 297
Material restrictions ........................................................................................................................ 297
Disposal of waste equipment by users ........................................................................................... 297
Electronic hardware recycling ........................................................................................................ 298
Chemical substances ....................................................................................................................... 298
Material Safety Data Sheet (MSDS) ................................................................................................ 298
EPEAT .............................................................................................................................................. 298
For more information ...................................................................................................................... 298
Declaration of conformity (X555 models) ........................................................................................................ 299
Declaration of conformity (X585dn model) ...................................................................................................... 301
Declaration of conformity (X585f and X585z models) ..................................................................................... 303
Certificate of volatility (X555 models) .............................................................................................................. 305
Certificate of volatility (X585 models) .............................................................................................................. 307
Safety statements ............................................................................................................................................. 309
Canada - Industry Canada ICES-003 Compliance Statement ......................................................... 309
VCCI statement (Japan) ................................................................................................................... 309
Power cord instructions .................................................................................................................. 309
Power cord statement (Japan) ....................................................................................................... 309
EMC statement (China) .................................................................................................................... 309
EMC statement (Korea) ................................................................................................................... 309
EMI statement (Taiwan) .................................................................................................................. 310
GS statement (Germany) ................................................................................................................ 311
Substances Table (China) ................................................................................................................ 311
SEPA Ecolabel User Information (China) ........................................................................................ 311
Restriction on Hazardous Substances statement (India) .............................................................. 312
viii ENWW
Restriction on Hazardous Substances statement (Turkey) ........................................................... 312
Restriction on Hazardous Substances statement (Ukraine) .......................................................... 312
Eurasian Conformity (Belarus, Kazakhstan, Russia) ...................................................................... 312
Additional statements for telecom (fax) products ........................................................................................... 313
EU Statement for Telecom Operation ............................................................................................ 313
New Zealand Telecom Statements ................................................................................................. 3 13
Additional FCC statement for telecom products (US) .................................................................... 313
Telephone Consumer Protection Act (US) ...................................................................................... 314
Industry Canada CS-03 requirements ............................................................................................ 314
Vietnam Telecom wired/wireless marking for ICTQC Type approved products ............................ 315
Japan Telecom Mark ....................................................................................................................... 315
Index ........................................................................................................................................................... 317
ENWW ix
x ENWW
List of tables
Table 1-1 Operation sequence ............................................................................................................................................. 4
Table 1-2 Power supply module operating modes ............................................................................................................ 11
Table 1-3 Printbar components ......................................................................................................................................... 14
Table 1-4 Product sensors ................................................................................................................................................. 20
Table 1-5 Paper-handling system motors ......................................................................................................................... 23
Table 1-6 Paper path zones ............................................................................................................................................... 26
Table 1-7 Service sled components ................................................................................................................................... 30
Table 1-8 Aerosol management system components ...................................................................................................... 32
Table 2-1 Troubleshooting flowchart ................................................................................................................................ 45
Table 2-2 Control panel diagnostic functions .................................................................................................................... 47
Table 2-3 Important information on the configuration pages .......................................................................................... 59
Table 2-4 Heartbeat LED status ....................................................................................................................................... 150
Table 2-5 Plug/jack locations (X555) ............................................................................................................................... 154
Table 2-6 Plug/jack locations (X585) ............................................................................................................................... 155
Table 2-7 Preboot menu options (1 of 6) ......................................................................................................................... 165
Table 2-8 Preboot menu options (2 of 6) ......................................................................................................................... 167
Table 2-9 Preboot menu options (3 of 6) ......................................................................................................................... 168
Table 2-10 Preboot menu options (4 of 6) ...................................................................................................................... 169
Table 2-11 Preboot menu options (5 of 6) ...................................................................................................................... 169
Table 2-12 Preboot menu options (6 of 6) ...................................................................................................................... 170
Table 2-13 Reports menu ................................................................................................................................................. 172
Table 2-14 General Settings menu .................................................................................................................................. 174
Table 2-15 Copy Settings menu (X585) ........................................................................................................................... 179
Table 2-16 Scan/Digital Send Settings menu (X585) ...................................................................................................... 185
Table 2-17 Fax Settings menu (X585) ............................................................................................................................. 195
Table 2-18 General Print Settings menu ......................................................................................................................... 207
Table 2-19 Print Options menu ........................................................................................................................................ 210
Table 2-20 Display Settings menu ................................................................................................................................... 211
Table 2-21 Manage Supplies menu .................................................................................................................................. 213
Table 2-22 Manage Trays menu ....................................................................................................................................... 217
Table 2-23 Network Settings menu ................................................................................................................................. 219
Table 2-24 Jetdirect Menu ................................................................................................................................................ 219
ENWW xi
Table 2-25 Troubleshooting menu .................................................................................................................................. 230
Table 2-26 Backup/Restore menu ................................................................................................................................... 233
Table 2-27 Calibrate/Cleaning menu ............................................................................................................................... 233
Table B-1 Physical specifications (X555 models), with ink cartridges ............................................................................ 292
Table B-2 Physical specifications (X585 models), with ink cartridges ............................................................................ 292
Table B-3 Operating-environment specifications ........................................................................................................... 292
xii ENWW
List of figures
Figure 1-1 Main components (X555 models) ....................................................................................................................... 2
Figure 1-2 Main components (X585 models) ....................................................................................................................... 3
Figure 1-3 System control .................................................................................................................................................... 7
Figure 1-4 Print subsystem components (X555 models) .................................................................................................. 12
Figure 1-5 Print subsystem components (X585 models) .................................................................................................. 13
Figure 1-6 Printbar components ........................................................................................................................................ 14
Figure 1-7 Paper-handling system paper path (X555 models) ......................................................................................... 17
Figure 1-8 Paper-handling system paper path (X585 models) ......................................................................................... 18
Figure 1-9 Product sensors (X555 models) ....................................................................................................................... 19
Figure 1-10 Product sensors (X585 models) ..................................................................................................................... 20
Figure 1-11 Paper-handling-system motors (X555 models) ............................................................................................ 22
Figure 1-12 Paper-handling-system motors (X585 models) ............................................................................................ 23
Figure 1-13 Paper path zones (X555 models) ................................................................................................................... 25
Figure 1-14 Paper path zones (X585 models) ................................................................................................................... 26
Figure 1-15 Servicing system components (X555 models) ............................................................................................... 28
Figure 1-16 Servicing system components (X585 models) ............................................................................................... 29
Figure 1-17 Service sled components ................................................................................................................................ 30
Figure 1-18 Aerosol management process ........................................................................................................................ 31
Figure 1-19 Aerosol management system components ................................................................................................... 32
Figure 1-20 Document feeder paper path and sensors ..................................................................................................... 34
Figure 2-1 Touchscreen blank, white, or dim (no image) .................................................................................................. 51
Figure 2-2 Touchscreen is slow to respond or requires multiple presses to respond ...................................................... 52
Figure 2-3 Touchscreen has an unresponsive zone .......................................................................................................... 53
Figure 2-4 No control panel sound ..................................................................................................................................... 54
Figure 2-5 Home
Figure 2-6 Hardware integration pocket (HIP) is not functioning (control panel functional) ........................................... 56
Figure 2-7 Configuration page ........................................................................................................................................... 57
Figure 2-8 HP embedded Jetdirect page ............................................................................................................................ 58
Figure 2-9 LEDs ................................................................................................................................................................. 149
Figure 2-10 Plug/jack locations (X555) ........................................................................................................................... 154
Figure 2-11 Plug/jack locations (X585) ........................................................................................................................... 155
Figure 2-12 Mark the web wipe ........................................................................................................................................ 163
button is unresponsive ..................................................................................................................... 55
ENWW xiii
Figure C-1 Certificate of volatility (X555 models) (1 of 2) ............................................................................................... 305
Figure C-2 Certificate of volatility (X555 models) (2 of 2) ............................................................................................... 306
Figure C-3 Certificate of volatility (X585 models) (1 of 2) ............................................................................................... 307
Figure C-4 Certificate of volatility (X585 models) (2 of 2) ............................................................................................... 308
xiv ENWW
1 Theory of operation
●
Basic operation
●
System control
●
Print subsystem
●
Paper-handling system
●
Servicing system
●
Aerosol management system
●
Document feeder (X585 models)
●
Scanner system (X585 models)
●
Fax functions and operation (X585 models)
ENWW 1
Basic operation
Function structure
The product consists of the following components.
Figure 1-1 Main components (X555 models)
Control panel
Output bin
Optical
scan
carriage
Printbar
Service sled
Multipurpose tray
(Tray 1)
Main input tray (Tray 2)
Duplex module\
Waste ink module
Optional tray (Tray 3)
2 Chapter 1 Theory of operation ENWW
Figure 1-2 Main components (X585 models)
Document feeder
Optical
scan
carriage
Control panel
Scanner
Output bin
Printbar
Multipurpose tray
(Tray 1)
Duplex module\
Waste ink module
The product contains the following systems:
●
Engine control system
●
Print subsystem
Service sled
Main input tray (Tray 2)
Optional tray (Tray 3)
●
Paper-handling system
●
Servicing system
ENWW Basic operation 3
●
Aerosol management system
●
Scanner and document feeder system (X585 models)
Two elements influence the product architecture:
●
Orienting the printbar with its active face downward and statically located above the print media. This
requires the printbar to move vertically to access its active face.
●
Producing face-down output. Rather than ejecting the page face-up immediately after the ink is
applied, as many inkjet printers do, the printed page is routed up and back over the printbar to eject
face-down.
Operation sequence
The engine-control system on the formatter PCA controls the operational sequences. The following table
describes durations and operations for each period of a print operation from when the product is turned on to
when the motors stop rotating.
Table 1-1 Operation sequence
Period Duration Purpose
Initial startup and
calibrations
Servicing operations When the printbar is entering
When the product is set up for
the first time from the factory.
the capping state after printing,
when leaving capping state after
a print job is initiated, or during
extended print jobs.
This period gets the product ready to print for the first time.
●
The product flushes the shipping and handling fluid out of the
printbar and replaces it with ink.
●
Die alignment—The product aligns the 10 die on the printbar
active face.
●
Die density leveling—The product measures and compensates
for the drop variation.
Servicing maintains the print quality by ensuring debris and excess
ink are removed and missing nozzles are replaced.
●
Nozzle presence detection—The optical scan carriage detects
and disables inoperable nozzles, and replaces them with
operable nozzles.
●
Printbar servicing—The web wipe on the service sled moves
under the printbar to clean the active face and fire the nozzles
into the waste ink module to clear clogs.
4 Chapter 1 Theory of operation ENWW
Table 1-1 Operation sequence (continued)
Period Duration Purpose
Print preparation From the time the product
receives a print command until
paper enters the print zone.
Printing From the end of the preparation
period until the last sheet is
delivered.
Prepares the product for a print job.
●
The printbar leaves the capping state as the service sled
moves away from the printbar.
●
If needed, some servicing occurs.
●
The printbar lowers to the printing position. The media type
and printing mode determine the print zone height.
●
The product picks media from one of the input trays.
●
Every page from Tray 1 is scanned. For Tray 2 and optional
Tray 3, the product performs media edge detection after
printing the first sheet after the main or optional tray is
loaded. The last sheet of each job is also scanned if at least
five sheets have been printed.
●
The product monitors environmental conditions. The product
can decrease the print speed if conditions are significantly
different from a normal office environment (23 degrees C (73
degrees F), 50% relative humidity).
●
The formatter PCA processes print data and transmits the data
to the printbar.
Processes the print job.
●
As the page travels through the print zone, the printbar
applies ink to the page.
●
Simplex print job: the page moves up, over the printbar, and
out to the output bin (face-down).
●
Duplex print job: the page moves up until the trailing edge is
40 mm past the star-wheel jam reflective sensor, then
reverses direction down through the duplex path underneath
the waste ink module, and then reenters the print zone where
the printbar applies ink to the second side.
●
The process continues until all the pages of the print job are
completed. Occasional nozzle presence detection and
servicing events might occur if the job includes many pages.
ENWW Basic operation 5
Table 1-1 Operation sequence (continued)
Period Duration Purpose
End of print job Performed after the print job is
completed, and continues until
the next job is initiated.
Standby The product is sitting idle,
waiting for the next print job to
be initiated.
Puts the product in a state where it’s ready for the next print job.
●
If needed, some servicing occurs.
●
The printbar moves to the capping position after a short dwell
interval.
●
The service sled moves to cap the printbar.
Conserves energy while the product is sitting idle. Certain functions
might be disabled to save power, then are restarted when needed.
The product has three sleep modes:
●
Idle mode—The printbar is capped and the product is ready to
immediately start a new job
●
Sleep1 mode—After the product is inactive for about 10
minutes, the control panel dims and the power LED blinks to
indicate the unit is in Sleep1. All product functions are
available. This setting can be adjusted from the control panel.
●
Sleep2 mode—After the product is inactive for a longer period
of time (typically 2 hours), the engine controller powers down
to minimize power consumption. This setting can be adjusted
from the control panel.
6 Chapter 1 Theory of operation ENWW
System control
The system control coordinates all the other systems, according to commands from the formatter.
Figure 1-3 System control
I/O
Formatter
I/O, PDL, UI control
Scanner/
document feeder
(X585 models)
Power supply
Datapath
ASIC +memory
Engine control
Motor + sensor drive
Pen I/F
• Pen energy control
• Pen voltage
sequencing
• Signal integrity
• Ink-short protection
• Printhead
interconnects
• Ink supply
Printbar
40,000 nozzles
The system consists of the following major sections:
●
Formatter
●
Data path
●
Engine control
●
Pen interface
●
Scanner/document feeder (X585 models)
●
Power supply
The engine control electronics are located on the engine control board (ECB). The formatter PCA is a separate
assembly. The fax module (X585 models) is attached to the formatter PCA.
Formatter and data path
The formatter controller ASIC controls the input/output (I/O) control, the user interface, and the rendering of
page description language files into printer-specific commands.
Input/output (I/O) control
The products support 10/100 Ethernet, a rear USB host port, a rear USB device port, a control panel USB host
port, and analog fax port (some X585 models). For Ethernet networks, the formatter PCA uses a separate
integrated circuit (Broadcom 57761) to provide the physical network interface.
The formatter PCA also controls the USB device and USB host.
User interface
The products contain either a 4.2-in (X555 models) or an 8-in (X585 models) color graphics display. The
control panels include a USB host port for connection to thumb drives.
Formatter digital ASIC
The formatter digital ASIC has an ARM CPÙ (792 MHz) that executes firmware code that provides high-level
device control. The digital ASIC uses a standard PCle interface to pass data to the engine control ASIC. The
ENWW System control 7
formatter firmware is located on either a rotating hard disk drive (HDD) or, on some X555 models, a solid
state drive (SSD).
Additionally, the formatter digital ASIC manages the real-time clock, interfaces to the mass storage
controller ASIC, provides control of USB ports, and interfaces with the Ethernet LAN ASIC and fax module.
Formatter Ethernet ASIC
The formatter Ethernet ASIC connects to the formatter digital ASIC with a PCIe interface to transmit and
receive network packets.
Formatter mass storage ASIC
The formatter mass storage ASIC bridges between the formatter digital ASIC (via PCIe interface) and the mass
storage device (via SATA interface). Both HDD and SSD mass storage media are supported. The X585 models
all use a rotating media HDD, while the X555 models use either HDD or SSD depending upon the bundle
option.
Formatter memory
Formatter memory is installed on-board and there is no support for additional DIMM memory installation.
The size of the memory on the formatter is fixed at 1 GB.
Real-time clock
The real-time clock (RTC) allows the fax module to time-stamp outgoing faxes. It also determines the
elapsed time between printhead and ISS calibration events. The RTC uses a separate device connected to the
formatter digital ASIC, along with a crystal and a battery.
Engine control
The engine controller digital ASIC receives high-level commands from the formatter, and then provides lowlevel control to the print mechanism. The engine controller digital ASIC and its firmware control motors,
system sensors, and the printbar. The engine controller analog ASIC integrates motor drivers, voltage
regulators, sensor interfaces, and supervisory circuits.
Engine controller digital ASIC
The engine controller digital ASIC has a high-performance 480 MHz ARM CPU and DSP co-processors that
execute firmware code to provide low-level engine control. It also drives the printbar via 15 high-speed LVDS
transmission lines, which are routed from the engine PCA to the printbar via two large FFC cables. The engine
controller digital ASIC receives pre-rendered data from the formatter digital ASIC over a standard PCle
interface.
In some product sleep modes, the digital ASIC powers down. If a print job is received while the product is in
this mode, power resumes to the digital ASIC, which then must “boot up”. This can take approximately 15
seconds, which will delay the first page out (FPO) time accordingly. This sleep mode typically begins after two
hours of product inactivity.
Engine controller analog ASIC
The engine uses two analog ASICs to generate the system voltages for the engine, drive the engine motors,
control various engine sensors, and monitor printbar power delivery for correct operation.
The engine has seven motors, some of which are shared with other subsystems:
8 Chapter 1 Theory of operation ENWW
●
Pick motor
●
Feed motor
●
Duplex motor
●
Lift motor
●
Eject motor
●
Sensor carriage motor
●
Aerosol fan motor
Each one is a DC motor with encoder feedback, to provide precision servo control. These motors are driven
directly by one of the engine analog ASICs. Small DC motors also are used to drive the ISS pump and the
aerosol fan. Solenoids actuate the ejection flap and the ISS priming system.
The product uses many sensors to track the media as it travels through the paper path. Most of these are
optical REDI sensors, which are used in conjunction with mirrors to sense the presence or absence of paper in
a particular location. These are carefully aligned and calibrated at the factory, so care must be taken when
servicing these sensors. See the Remove and Replace chapter in the repair manual for more details.
Other printed circuit-board assemblies (PCAs)
In addition to hosting the system ASICs, the engine PCA is home to many circuits needed to interface to
sensors and other sub-system components. In some cases, this circuitry is located on a smaller remote PCA
(SLB) to optimize cable interconnects.
●
Humidity sensor—The humidity sensor causes the product to adjust printing speed if ambient
conditions are outside the optimal humidity range. This sensor is calibrated at the factory to ensure
maximum accuracy.
●
Temperature sensor—The temperature sensor causes the product to adjust printing speed if ambient
conditions are outside the optimal temperature range. In some products, this sensor resides on a
separate, remote PCA.
●
Main tray presence sensor—The hall-effect sensor that detects if the main tray is properly engaged
resides on the back of the engine PCA. A small magnet on the back of the main tray actuates the sensor.
If the tray is fully engaged, the magnetic field strength is sufficient to trigger the sensor.
Additionally, the product includes the following PCAs:
●
Fax PCA—Governs the product fax module.
●
Duplex module presence sensor—A hall-effect sensor that detects that the duplex module is properly
seated.
●
Power button PCA—Includes the power button and power LED, as well as interface cables to the duplex
module presence sensor and the MP tray empty REDI sensor.
●
Accessory tray interconnect PCA—Provides communication to optional Tray 3.
●
Pick encoder distribution PCA—Includes the pick motor encoder and the pick motor interconnect cable.
●
Eject encoder distribution PCA—Includes the eject motor encoder and the interconnect cables to the
eject motor and the aerosol fan.
ENWW System control 9
●
Print zone distribution PCA—Joins interconnect cables to the following sensors: separator REDI, feed
motion encoder, main tray empty sensor, feed roller OOPs REDI sensor, and the starwheel jam REDI
sensor.
●
REDI distribution PCA—Includes hall-effect sensors that detect ink cartridge door and left door
positions. It also combines the interconnect cables for the eject jam REDI sensor, the upper drying path
REDI sensor, the lower drying path REDI sensor, and the eject flap opto flag sensor.
●
Sensor carriage PCA—Includes a carriage motion encoder, a ZIM sensor, and the BDD sensor.
●
Printbar lift encoder distribution PCA—This PCA includes the printbar lift motion encoder, and combines
interconnect cables to the printbar lift motor, carriage motor, and eject flap solenoid.
●
Duplex encoder PCA—Contains the motion encoder for the duplex motor.
●
SHAID PCA —Contains interfaces to the out-of-ink sensors for the ink cartridges, and combines the
interface cables to the acumen PCA, the ISS pump, and the ISS solenoids.
●
Acumen PCA—Contains interfaces to the acumen memory devices for the ink cartridges.
Pen interface (I/F)
The printbar is the key component that differentiates this product from other inkjet printers. The
conventional approach is to print a page in horizontal swaths by moving a “scanning” printhead horizontally
over a fixed sheet of paper, advancing the paper a fixed amount, and then printing the next swath. With this
product, the paper moves underneath a fixed page-wide printhead in a single smooth motion.
Single pass page-wide printing requires that data and power be delivered to the printbar at a very high rate,
while also maintaining good control of paper position as it moves past the printhead nozzles.
The engine PCA sends power and data to the printbar via two large flat flexible cables (36 and 38 pins). The
printbar PCA routes power and data to 10 printhead die, which are attached to the PCA using a flexible tab
circuit and wire-bonding process.
Electronics control the ink supply station (ISS). The SHAID PCA detects low-ink conditions. It gauges ink levels
by electrically sensing the presence of ink and/or ink foam in the X-chamber. The SHAID PCA also collects and
distributes electrical signals that drive the push-prime pump(s), engage the solenoids, and read the ink
supply acumen data. All are routed through a single 17-pin FFC from the SHAID PCA to the engine PCA.
Each ink supply has a memory tag that stores information about its type of ink, the amount of ink remaining,
and other critical data. It uses a special authentication scheme to ensure that only genuine HP supplies are
used and the product is not damaged by using invalid supplies. Acumen uses a two-line serial bus, which,
along with 3.3 V and ground, is cabled via the SHAID PCA to the engine PCA and the engine control digital
ASIC.
Power supply
The power supply module converts 100-240 VAC to 33 VCD and 5.1 VCD to power the system. The 33 V rail
goes to the engine and the scanner/document feeder, and the 5.1 V rail is supplies power to the formatter.
The power supply module has a sleep mode that reduces power consumption in system low-power modes.
The power supply module has four operating modes, depending on certain control signals, as outlined in the
table below. The power supply has a power factor correction (PFC) circuit to improve efficiency when the
system is in the active mode.
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Table 1-2 Power supply module operating modes
Mode n33V_OFF input signal nPFC_OFF input signal PFC Status 33 V rail status 5.1 V rail status
OFF Low Low Off Off On
Sleep 2 Low Low Off Off On
Sleep 1 High Low Off On On
Active High High On On On
The power supply is a self-contained module that can be replaced if it is defective (see the Remove and
Replace chapter of the Repair Manual).
To ensure safe operation, the power supply will “latch off” if a persistent over-current fault condition exists.
This is typically caused by a short-circuit from 33 V or 5.1 V to ground in the product. Less severe faults also
can cause the power supply to latch off, if present for an extended period of time, or if the product is
operated above the recommended operating range.
ENWW System control 11
Print subsystem
The print subsystem includes the following components:
●
Printbar
●
Printbar lift
●
Ink cartridges
●
Optical scan carriage
Figure 1-4 Print subsystem components (X555 models)
Optical
scan
carriage
Ink cartridges
Printbar lift
Printbar
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Figure 1-5 Print subsystem components (X585 models)
Ink cartridges
Optical
scan
carriage
Printbar lift
Printbar
Printbar
The printbar converts the digital firing instructions from the product electronics into properly formed and
timed microscopic drops of the four ink colors. The printbar spans the full width of a letter/A4-size sheet
(216 mm (8.5 in)), which allows it to be statically positioned within the product and have the media move
underneath it, printing the entire page in a single motion.
ENWW Print subsystem 13
Figure 1-6 Printbar components
1
4
23
Table 1-3 Printbar components
Item Description
1 Ink cartridge connections
2 Thermal inkjet (TIJ) die array
3 Data/power flow and regulation
4 Inkflow channels and pressure regulation
The printbar has a fixed array of 10 thermal inkjet (TIJ) die oriented in two staggered rows. Each die contains
over one thousand nozzles for each of the four ink colors (black (K), cyan (C), magenta (M) and yellow (Y)).
Behind the die array are the ink flow channels and pressure regulation mechanisms that supply the die array
with ink at the proper pressure and flow. Onboard electronic circuitry feeds power and data to the die at the
appropriate levels and rates. Four ink cartridge receptacles, one for each color, are located at the top of the
printbar. Flow connections link these cartridges to the rest of the printbar to supply the ink necessary for its
operation.
A sensor technology called back-scatter drop detect (BDD) monitors printbar health and calibrations. This
system looks at the reflection of the miniscule drops in flight and passes these signals through proprietary,
advanced high-speed, high-gain, bandpass filters. An artificial intelligence (AI) system decides which drop
ejectors are currently in or out of specifications.
After the AI system determines which drop ejectors are out of specification, the product compensates for
them. Some ejectors use neighboring nozzles and at times even tiny amounts of other inks – whichever
combination of methods necessary to deliver the best print quality possible at that moment. Up to half of the
nozzles can be “out” without a noticeable degradation in quality. The compensation is done in real time with
a dedicated high-speed DSP. The system can scan portions of the system after print jobs, but it is fully
interruptible by new incoming print jobs.
Printbar lift
The printbar lift positions the printbar within the product and moves it up and down as required. This vertical
motion establishes proper spacing to the paper during printing. It also raises the printbar to access the active
face or perform necessary calibrations.
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