HP Scanjet Enterprise 8500 fn1 and digital sender flow 8500 fn1 - service manual (EN)

8500 fn1 Service Manual

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Copyright and license Trademark credits © 2013 Copyright Hewlett-Packard Development Company, L.P. Adobe ® , Acrobat ® , and PostScript ® are trademarks of Adobe Systems Incorporated. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. ENERGY STAR ® and the ENERGY STAR ® mark are registered U.S. marks. Microsoft®, Windows®, Windows® XP, and Windows Vista® are U.S. registered trademarks of Microsoft Corporation. The information contained herein is subject to change without notice.

The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Part number: L2717-90014 Edition 2, 10/2013

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Table of contents 1 Theory of operation .......................................................................................................... 1 Flatbed scanner and ADF assembly ............................................................................................ 3 Network electronics assembly .................................................................................................... 4 User interface assembly ............................................................................................................ 6 2 Removal and replacement ................................................................................................

7 Introduction ............................................................................................................................. 8 Removal and replacement strategy ............................................................................................. 9 Electrostatic discharge ............................................................................................................ 10 Required tools ........................................................................................................................ 11 Types of screws .....................................................................................................................

12 Service approach ................................................................................................................... 15 Before performing service ........................................................................................ 15 Backup product data ................................................................................ 15 After performing service ........................................................................................... 15 Restore product data ................................................................................ 16 Save and repair process ...........................................................................

16 Post-service test ....................................................................................................... 16 Quality test .............................................................................................. 17 Customer self repair (CSR) assemblies ...................................................................................... 18 ADF rollers ............................................................................................................. 18 Remove the ADF rollers: ............................................................................ 18 Separation pad ........................................................................................

21 Update the document feeder kit replacement history ..................................... 22 Set the Very Low Settings option from the control panel ................................. 22 Control-panel assembly ............................................................................................ 24 Reinstall the control-panel assembly ............................................................ 25 Hard disk drive ....................................................................................................... 26 Remove the hard disk drive .......................................................................

26 Reinstall the hard disk drive ........................................................ 29 Reload the firmware .................................................................. 29 ENWW iii

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Formatter PCA ........................................................................................................ 31 Reinstall the formatter PCA ........................................................................ 36 Keyboard assembly ................................................................................................. 36 Internal assemblies ................................................................................................................. 39 Flatbed scanner and ADF assembly ........................................................................... 39 Remove the flatbed scanner and ADF assembly: ...........................................

39 Reinstall the flatbed scanner and ADF assembly ............................ 42 Power-button assembly ............................................................................................. 44 Remove the power-button assembly ............................................................ 44 Interconnect cable, scanner cable, and control-panel cable .......................................... 46 Reinstall the power-button assembly ............................................................ 45 Remove the scanner cable, control-panel cable, and interconnect cable .......... 46 Interconnect PCA, fan assembly, and DC controller PCA ..............................................

53 Remove the interconnect PCA, fan assembly, and DC controller PCA: ............. 53 3 Solve problems ............................................................................................................... 59 Solve problems checklist ......................................................................................................... 60 Administration Menu Map ....................................................................................................... 61 Preboot menu options .............................................................................................................

62 Current settings page .............................................................................................................. 63 Troubleshooting process .......................................................................................................... 64 Determine the problem source ................................................................................... 64 Troubleshooting flowchart ......................................................................... 65 Power subsystem .....................................................................................................

68 Power-on checks ...................................................................................... 68 Power-on troubleshooting overview .............................................. 68 Firmware startup steps ............................................................... 69 Control-panel checks ............................................................................................... 73 Control-panel checks from the control panel ................................................. 73 Control-panel checks from diagnostic mode .................................................

73 Generate debug data .............................................................................................. 75 Check the maintenance history ................................................................................. 75 Check the number of scans ....................................................................................... 75 Tools for troubleshooting ......................................................................................................... 76 Component diagnostics ............................................................................................

76 LED diagnostics ........................................................................................ 76 LED indicators on the formatter .................................................... 76 Interpret control-panel status lights ............................................... 77 Engine diagnostics ................................................................................... 77 Verify power to the flatbed scanner and ADF assembly .................. 77 Test simplex scanning ................................................................ 78 iv ENWW

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