This document contains proprietary information
that is protected by copyright. All rights are
reserved. No part of this document may be
photocopied, reproduced, or translated to
another language without the prior written
consent of HP Development Company.
The information contained in this document is
subject to change without notice.
HP makes no warranty of any kind with regard
to this material, including, but not limited to, the
implied warranties of merchantability and
tness for a particular purpose.
HP shall not be liable for errors contained herein
or for incidental or consequential damages in
connection with the furnishing, performance, or
use of this material.
Safety
The Warning symbol calls attention to a
procedure, practice, or the like, which, if not
correctly performed or adhered to, could result
in personal injury. Do not proceed beyond a
Warning symbol until the indicated conditions
are fully understood and met.
The Caution symbol calls attention to an
operating procedure, practice, or the like, which,
if not correctly performed or adhered to, could
result in damage to or destruction of part or all
of the printer. Do not proceed beyond a Caution
symbol until the indicated conditions are fully
understood and met.
Theory of operation ................................................................................................................................................................. 6
The front panel ....................................................................................................................................................................... 35
Service keys combination ..................................................................................................................................................... 37
Troubleshooting tree (T920 and T1500 only) ................................................................................................................... 39
Product Troubleshooting trees (T2500 and T3500 only) ............................................................................................... 41
Scanner Troubleshooting Tree ............................................................................................................................................ 42
Troubleshooting using board LEDs ..................................................................................................................................... 44
Paper handling problems ..................................................................................................................................................... 50
HP 727 Printhead Troubleshooting .................................................................................................................................. 111
Videos for replacing CSR parts and HP 727 printhead .................................................................................................. 113
What to do if the front panel fails to initialize ................................................................................................................. 118
System error codes in brief ................................................................................................................................................ 121
System error codes in full .................................................................................................................................................. 124
Appendix A: How to troubleshoot system error 79:04 and 79.2:04 ........................................................................... 164
Appendix B: Updating rmware in boot mode ................................................................................................................ 176
Appendix C: Obtaining the diagnostics package ............................................................................................................. 177
ENWWv
4 Diagnostics, Service Utilities and Calibrations ................................................................................................................................. 179
Diagnostic Tests and Utilities ............................................................................................................................................. 181
Service Utilities ..................................................................................................................................................................... 203
Service Calibrations ............................................................................................................................................................. 232
5 Parts and diagrams .............................................................................................................................................................................. 240
Printer support ..................................................................................................................................................................... 241
Center and Roll covers ........................................................................................................................................................ 242
Cover Front Panel Side ........................................................................................................................................................ 244
Cover SVS Side ...................................................................................................................................................................... 245
Center Assemblies ............................................................................................................................................................... 246
Front Panel Side Assemblies .............................................................................................................................................. 248
SVS Side Assemblies ........................................................................................................................................................... 249
Paper Path Assemblies (Front) .......................................................................................................................................... 251
Paper Path Assemblies (Center) ........................................................................................................................................ 253
Stacker Parts (Rear) ............................................................................................................................................................. 255
Stacker Parts (Front) ........................................................................................................................................................... 256
Electrical Parts ..................................................................................................................................................................... 261
Miscellaneous Parts ............................................................................................................................................................. 263
CIS Unit Construction ........................................................................................................................................................... 265
Scanner Control Unit ........................................................................................................................................................... 266
6 Removal and installation .................................................................................................................................................................... 269
Parts list; all models ............................................................................................................................................................ 270
Parts list; HP Designjet T2500 and T3500 eMultifunction Series only ....................................................................... 272
Parts list; HP Designjet T2500 eMultifunction Series only ............................................................................................ 273
Parts list; HP Designjet T3500 eMultifunction Series only ............................................................................................ 274
Customer Self Repair parts ................................................................................................................................................ 277
Service Calibration Guide to Removal and Installation .................................................................................................. 278
Main cover (front panel side) .............................................................................................................................................. 281
Main cover (service station side) ....................................................................................................................................... 283
Center cover (T920 only) .................................................................................................................................................... 285
HP 727 Printhead installation tips and tricks .................................................................................................................. 298
Ink Service kit ....................................................................................................................................................................... 303
Open the E-Box .................................................................................................................................................................... 304
E-Box fan ............................................................................................................................................................................... 308
Power supply unit ................................................................................................................................................................ 311
Hard disk drive ..................................................................................................................................................................... 313
Front panel ............................................................................................................................................................................ 318
Line Sensor ........................................................................................................................................................................... 326
Belt ......................................................................................................................................................................................... 332
Scan Axis Motor .................................................................................................................................................................... 335
Drop Detector ....................................................................................................................................................................... 338
Service Station with Drop Detector ................................................................................................................................... 339
Primer Assembly .................................................................................................................................................................. 343
ISS (Ink Supply Station) Front Panel Side ......................................................................................................................... 346
ISS SVS Side .......................................................................................................................................................................... 350
Ink Tubes and Trailing Cable .............................................................................................................................................. 354
Media Sensor ........................................................................................................................................................................ 357
Bottom Rewinder Support ................................................................................................................................................. 359
Top Rewinder Support ........................................................................................................................................................ 361
Top Tip Support .................................................................................................................................................................... 363
Bottom Tip Support ............................................................................................................................................................. 364
Vertical Media Guide ............................................................................................................................................................ 366
Center Support ..................................................................................................................................................................... 368
Full Bleed ............................................................................................................................................................................... 369
Auto Pinch Lifter ................................................................................................................................................................... 370
Motor Media Advance Transmission with Encoder ......................................................................................................... 379
Starwheel Motor .................................................................................................................................................................. 387
Starwheel Support ............................................................................................................................................................... 392
Second Starwheel Rail ........................................................................................................................................................ 394
Valves Motor ......................................................................................................................................................................... 404
Stacker Hand O .................................................................................................................................................................. 412
Stacker Hand O Assy Service Kit (CR357-67041) ........................................................................................................ 413
OVD Transmission with Motor ........................................................................................................................................... 420
Ramps Motor ........................................................................................................................................................................ 422
Stacker Arm Sensor ............................................................................................................................................................. 424
How to release Service Station Caps ................................................................................................................................ 427
How to manually move Valves .......................................................................................................................................... 428
How to manually move Stacker Ramps ........................................................................................................................... 429
Scanner Controller Unit (SUP) ............................................................................................................................................ 430
Stepper Motor Assembly (taco sensor, and belt) ........................................................................................................... 435
Stepper Motor Assembly (cable) ....................................................................................................................................... 437
Paper and Lid Sensors ........................................................................................................................................................ 438
Paper and Lid Sensor Cable ............................................................................................................................................... 440
USB & Awake / Power Cable .............................................................................................................................................. 441
Front panel side scanner cover ......................................................................................................................................... 447
Service station side scanner cover .................................................................................................................................... 448
Deector hinge ..................................................................................................................................................................... 451
Top scanner cover ................................................................................................................................................................ 455
Stacker arm .......................................................................................................................................................................... 478
Leg, front-panel side ........................................................................................................................................................... 481
Leg, service-station side ..................................................................................................................................................... 484
Bottom roll cover ................................................................................................................................................................. 487
Top roll cover ........................................................................................................................................................................ 489
Pinch arm top roll ................................................................................................................................................................ 496
Pinch arm bottom roll ......................................................................................................................................................... 497
Adobe PostScript 3, Adobe PDF 1.7ext3 HP-GL/2, HPRTL, TIFF, JPEG, CALS G4, HP PCL 3 GUI, URF
Job on-hold for
media
(mummify)
Auto rotate,
automatic blank
area removal
Accounting in
EWS
XXXXXX
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Readership
The procedures described in this service manual are to be performed by HP Certied service personnel only.
4Chapter 1 Printer fundamentalsENWW
Part numbers
Part numbers for printer service parts are located in Parts and diagrams on page 240.
Warning labels
Electric shock hazard
Hazardous voltage inside the printer (built-in power supply) could result in death or serious personal
injury. See the installation instructions before connecting power. Ensure that the input voltage is within
the printer's rated voltage range. Use only earthed mains outlets and the power cords supplied by HP
with the printer. There are no operator-serviceable parts inside the printer. Refer servicing to qualied
service personnel. Disconnect the power cord before servicing. Voltage is still present in the built-in
power supply after the main switch is turned o.
Double pole/neutral fusing
Electric shock hazard. The built-in power supply incorporates a fuse on each conductor, therefore the
printer could be energized even when one fuse has blown. There are no operator-replaceable fuses
inside. Refer servicing to qualied service personnel. Disconnect the power cord before servicing.
ENWWIntroduction5
Theory of operation
Schematics
Electronics are based on 3 main components:
●
E-box - contains the power supply and all the PCAs (driving the printer), plus the Ethernet port.
●
Carriage PCA - drives the printhead.
●
Front Panel - user interface and USB port.
The following diagram describes the connections between components and electronic boards and the data line
type for T920, T1500 and T2500.
Block Diagram
(HP DesignJet T3500 eMultifunction Series only)
6Chapter 1 Printer fundamentalsENWW
ENWWTheory of operation7
Block Diagram
(HP DesignJet T2500 and T3500 eMultifunction Series only)
Wiring Diagram
(HP DesignJet T2500 and T3500 eMultifunction Series only)
Scanner Controller Board Layout (SULG)
(HP DesignJet T2500 and T3500 eMultifunction Series only)
VoltageMin limitMax limit
TP15V-Main (Always on when there
is power to the board)
TP25V4.755.25
TP31.2V1.11.3
TP83.3V3.23.4
TP62.5V2.42.6
TP71.8V1.71.9
8Chapter 1 Printer fundamentalsENWW
4.755.25
VoltageMin limitMax limit
TP150.9V0.81.0
IC2013.3VLDO3.13.5
IC2033.3VLDO3.13.5
IC2043.3VLDO3.13.5
ENWWTheory of operation9
10Chapter 1 Printer fundamentalsENWW
ENWWTheory of operation11
12Chapter 1 Printer fundamentalsENWW
Printer Initialization
There are 3 main blocks to be initialized before the printer can be operated:
ENWWTheory of operation13
Electronic components init
1.The front panel shows a white background and blue HP logo.
2.The upper LED in the formatter is ON, indicating that the formatter has been initialized.
3.The middle LED in the formatter blinks, indicating that the HDD has been initialized.
NOTE: Steps 2&3 are the same when waking from Sleep Mode except the 3 LEDs are not on but; ON-
Blinking-OFF
OS & Firmware init
1.The OS is loaded into RAM. The Front Panel blinks for a second.
2.If boot up is after a bad power-o, the boot sequence automatically runs a le system check.
a. The Front Panel shows the FSCK, text.
b. First, FSCK runs on the root partition.
c. If FSCK is successful, the OS boots up from the root partition and runs FSCK on the data partition.
3.After FSCK, the OS nishes booting from the HDD.
4.The home button lights up to allow stopping the boot sequence, and entry to the diagnostics menu, see
Diagnostics, Service Utilities and Calibrations on page 179.
Mechanical components init
1.The Front Panel shows a black background with a blue circle in the middle. The “Initializing” message
appears. A progress bar shows the percentage of subsystems that have been initialized.
2.The printer moves the carriage from side to side to validate its position within the scan axis. The printer
initializes the service station, moving the caps from bumper to bumper.
14Chapter 1 Printer fundamentalsENWW
3.The pinches move down into position.
4.T2500 and T3500 only: The printer will initialize the Scanner and start checking it.
5.The carriage and service station move to the home position
6.The printer checks the status of supplies and the printhead, and then initializes the Ink Supply Stations.
7.Servicing routines are launched. The routines refresh the printhead depending on the time that the printer
has been o. The Front Panel shows “Preparing Print System”.
8.The paper path subsystems are initialized by exercising the ramps and rewinder, checking if there is media
present over the Media Sensor.
9.At the end of the process, the home screen appears in the Front Panel.
Front Panel Menu Map
The following tables show the front panel menu layout.
ENWWTheory of operation15
16Chapter 1 Printer fundamentalsENWW
ENWWTheory of operation17
18Chapter 1 Printer fundamentalsENWW
ENWWTheory of operation19
20Chapter 1 Printer fundamentalsENWW
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