DESIGNJET T120/T520 ePrinter Series
Service Manual
DESIGNJET T120/T520 ePrinter Series
Service Manual
© 2012 Hewlett-Packard Development
Company, L.P.
1st edition, August 2012
Legal notices
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 Hewlett-Packard
Company.
Notices
Warranty
The information contained in this
document is subject to change without
notice.
Hewlett-Packard makes no
warranty of any kind with
regard to this material,
including, but not limited to,
the implied warranties of
merchantability and fitness for
a particular purpose.
Hewlett-Packard 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.
WARNING
The procedures described in this manual are
to be performed by HP-qualified service
personnel only.
Electrical Shock Hazard
Serious shock hazard leading to death or
injury may result if you do not take the
following precautions:
Ensure that the AC power outlet (mains)
●
has a protective earth (ground)
terminal.
Disconnect the printer from the power
●
source prior to performing any
maintenance.
Prevent water or any other liquids from
●
running onto electrical components or
circuits, or through openings in the
enclosure.
Electrostatic Discharge
See the beginning of Chapter 4's
Introduction on page 143 of this manual, for
precautions you should take to prevent
damage to the printer circuits from
electrostatic discharge.
WARNING
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.
CAUTION
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.
Customer Assurance
Customer Experience Section
Large Format Printing Division
Hewlett-Packard Española, S.A.
Avenida Graells, 501
08174 Sant Cugat del Vallès
Spain
Safety Symbols
General definitions of safety symbols are
given immediately after the table of
contents.
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Using this manual
This service manual contains information necessary to test, maintain, and service the following:
HP Designjet T120 Basic Printer 24 inch CQ891A
HP Designjet T520 Pro Printer 24 inch CQ890A
HP Designjet T520 Pro Printer 36 inch CQ893A
For information about using these printers, see the user's guide.
Readership
The procedures described in this service manual are to be performed by HP Certified service personnel
only.
Part numbers
Part numbers for printer service parts are located in
Parts and diagrams on page 126.
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vi Using this manual ENWW
Table of contents
1 Printer fundamentals ........................................................................................................ 1
Overview ................................................................................................................................ 1
Using the front panel ................................................................................................................ 2
Start-up sequence ..................................................................................................................... 3
Subsystems .............................................................................................................................. 5
2 Troubleshooting .............................................................................................................. 34
Printer troubleshooting flowchart .............................................................................................. 35
Basic printer troubleshooting ................................................................................................... 36
System error codes ................................................................................................................. 39
Paper troubleshooting ............................................................................................................. 61
Communication troubleshooting ............................................................................................... 66
Ink-supplies troubleshooting ..................................................................................................... 70
Print-quality troubleshooting ..................................................................................................... 83
Update the firmware ............................................................................................................... 97
3 Support menus ............................................................................................................. 101
Entering the support menus .................................................................................................... 102
Support menu ...................................................................................................................... 104
Extended Support menu ........................................................................................................ 124
4 Parts and diagrams ...................................................................................................... 126
Introduction ......................................................................................................................... 126
Printer support ..................................................................................................................... 127
Covers ................................................................................................................................ 128
Roll covers .......................................................................................................................... 129
Right-hand assemblies ........................................................................................................... 130
Left-hand assemblies ............................................................................................................. 132
Carriage assembly ............................................................................................................... 134
Paper path (front) ................................................................................................................. 136
Paper path (rear) ................................................................................................................. 137
Roll supports ........................................................................................................................ 138
Sensor Kit ........................................................................................................................... 139
Miscellaneous parts .............................................................................................................. 140
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5 Removal and installation .............................................................................................. 141
Introduction ......................................................................................................................... 143
Customer Self Repair parts .................................................................................................... 145
Videos available .................................................................................................................. 146
Recommended checks after replacing parts ............................................................................. 146
Top Cover ........................................................................................................................... 147
Front Cover ......................................................................................................................... 150
Right Cover ......................................................................................................................... 153
Ink Cartridge Cover .............................................................................................................. 156
Left Cover ........................................................................................................................... 158
Roll Cover ........................................................................................................................... 160
Back Cover ......................................................................................................................... 163
Front Panel .......................................................................................................................... 165
Front Panel Cable ................................................................................................................ 171
Central Cover ...................................................................................................................... 172
Upper-Roll Paper Guide ........................................................................................................ 177
Left Roll Support ................................................................................................................... 180
Right Roll Support ................................................................................................................. 185
Top Cover Sensor ................................................................................................................ 188
Top Cover Sensor Cable ....................................................................................................... 191
Encoder Strip ....................................................................................................................... 193
Ink Cartridge Cover PCA Assembly ........................................................................................ 198
Power Supply ...................................................................................................................... 202
Main PCA ........................................................................................................................... 205
Paper Motor ........................................................................................................................ 211
Encoder PCA and Index ........................................................................................................ 213
Encoder Disk ....................................................................................................................... 217
Trailing Cable ..................................................................................................................... 220
Service Station ..................................................................................................................... 227
Prime Pump ......................................................................................................................... 233
Carriage and Belt ................................................................................................................ 236
Carriage Belt ....................................................................................................................... 243
Right Gear Train Module ...................................................................................................... 245
Starwheel Assembly ............................................................................................................. 247
Output Shaft ........................................................................................................................ 249
Output Tray ......................................................................................................................... 257
Multi-Sheet Tray Assembly ..................................................................................................... 260
Multi-Sheet Tray Assembly Extensions ..................................................................................... 261
Output Platen ...................................................................................................................... 263
Carriage Motor ................................................................................................................... 268
Cutter Assembly ................................................................................................................... 272
Cutter Guide ....................................................................................................................... 279
Out-Of-Paper Sensor ............................................................................................................. 281
Out-Of-Paper Sensor Cable ................................................................................................... 284
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Output Tray Sensor Assembly ................................................................................................ 286
Output Tray Extender Sensor Cable ........................................................................................ 289
Carriage Line Sensor ............................................................................................................ 293
Bundle Board ...................................................................................................................... 297
Bundle Board FFC cable ....................................................................................................... 299
Pinchwheels ........................................................................................................................ 304
Left Spittoon ........................................................................................................................ 310
6 Preventive maintenance ............................................................................................... 313
Preventive maintenance ........................................................................................................ 314
Preventive maintenance kits ................................................................................................... 320
7 Appendices ................................................................................................................... 323
Important links ..................................................................................................................... 324
Front-panel home screen and menu map ................................................................................. 325
Support menu tree ................................................................................................................ 335
Extended Support menu tree .................................................................................................. 336
How to check whether your computer is connected to your network ............................................ 337
Wireless troubleshooting report error cases ............................................................................. 340
CSR fliers ............................................................................................................................ 351
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