Oki C301 User manual

OEL
Maintenance Manual
C301/C321/C331/C511/C531
Revision 2
Rev Date Oki Data Corporation
1 2012-04-26
2 2012-06-29
Name
C301/C321/C331/C511/C531
Maintenance Manual
This document is “OKI DATA – CONFIDENTIAL”
Only persons and parties authorised by OKI DATA have
permissions to access this document.
This document should not be accessed by any parties
without the approval of OKI DATA.
Anyone who is found to be contradicting the above may be subject to legal action.

44951501TH Rev.2 ii /
Oki Data CONFIDENTIAL
Document Revision History
Rev.
No. Date Changed items Person in charge
No. Page Description of change
1 2012-04-26 Issue NME13
H. Enomoto
2 2012-06-29 Addition of EDT series NME13
H. Enomoto
Rev.
No. Date Changed items Person in charge
No. Page Description of change
Document Revision History

44951501TH Rev.2 iii /
Oki Data CONFIDENTIAL
This manual explains the maintenance methods for the C301dn, C321dn, C331dn, C511dn
and C531dn printers.
The manual has been prepared for use by the maintenance personnel. For how to operate
the C301dn/C321dn/C331dn/C511dn and C531dn printers, refer to the corresponding user’s
manual.
These printer names may be given as follows in this manual.
C301dn
C301
C321dn
C321
C331dn
C331
C511dn
C511
C531dn
C531
Note! •Thecontentsofthismanualaresubjecttochangeswithoutpriornotice.
 •Despitethatexhaustiveeffortsweremadeinpreparingthemanualtomake
it accurate, it still may contain errors. Oki Data will not hold itself liable
for any damage that results or is claimed to have resulted from repairs,
adjustment, or modications of the printers conducted by the users using
this manual.
 •ThepartsemployedintheC301dn,C321dn,C331dn,C511dn,andC531dn
printers are so delicate that they may be damaged if not treated properly.
Oki Data Corporation highly recommends that the maintenance of the
printers is undertaken by ODC's registered maintenance personnel.
 •Workaftereliminatingstaticelectricity.
PREFACE
PREFACE

44951501TH Rev.2 iv /
Oki Data CONFIDENTIAL
CONTENTS
CONTENTS
1. CONFIGURATION..................................................................1-1
1.1 System configuration .........................................................................................1-2
1.2 Printer configuration ...........................................................................................1-3
1.3 Optional items ....................................................................................................1-4
1.4 Specifications .....................................................................................................1-5
1.5 Interface specifications .......................................................................................1-9
1.5.1 USB interface specifications ........................................................................1-9
1.5.1.1 USB interface overview.........................................................................1-9
1.5.1.2 USB interface connector and cable ......................................................1-9
1.5.1.3 USB interface signals ...........................................................................1-9
1.5.2 Network interface specifications ................................................................1-10
1.5.2.1 Network interface overview.................................................................1-10
1.5.2.2 Network interface connector and cable...............................................1-10
1.5.2.3 Network interface signals ...................................................................1-10
2. DESCRIPTION OF OPERATION ...........................................2-1
2.1 Electrophotographic process mechanism ..........................................................2-2
2.2 Printing process..................................................................................................2-6
3.INSTALLATION........................................................................3-1
3.1 Cautions, and do’s and don’ts.............................................................................3-2
3.2 Unpacking procedure .........................................................................................3-3
3.3. Printer installation instructions ..........................................................................3-4
3.4 List of components and accessories ..................................................................3-5
3.5 Assembly procedure ..........................................................................................3-6
3.5.1 Assembly of the printer main unit ................................................................3-6
3.5.2 Connection of the power cable ..................................................................3-10
3.5.3 Installation and recognition confirmation of an option ...............................3-12
3.6 Printing of MenuMap ........................................................................................3-21
3.7 Connection methods.........................................................................................3-22
3.8 Checking of paper used by the user .................................................................3-24
4.REPLACEMENT OF PARTS...................................................4-1
4.1 Notes on replacement of parts............................................................................4-2
4.2 Part replacement procedure ...............................................................................4-4
4.2.1 Belt unit.........................................................................................................4-4
4.2.2 Fuser unit......................................................................................................4-5
4.2.3 Left side cover ..............................................................................................4-5
4.2.4 Right side cover............................................................................................4-6
4.2.5 Face-up tray..................................................................................................4-6
4.2.6 Rear cover....................................................................................................4-7
4.2.7 LED assembly. and LED assembly springs ..................................................4-7
4.2.8 Image drum fan and ZHJ board....................................................................4-8
4.2.9 CU/PU PCB and low-voltage power supply..................................................4-8
4.2.10 Top cover assembly..................................................................................4-10
4.2.11 Top cover and LED head cable assembly.................................................4-10
4.2.12 Operator panel assembly..........................................................................4-11
4.2.13 Board IBB and LCD..................................................................................4-11
4.2.14 MPT assembly..........................................................................................4-12
4.2.15 Front fan, hopping motor, rear fan, image drum motor and
cover-open switch.....................................................................................4-13
4.2.16 High-voltage power supply board.............................................................4-14
4.2.17Guide-ejectionassembly,fuserconnectorassemblyand
color-registration assembly ......................................................................4-15
4.2.18 Frame-MPT assembly and feeder assembly...........................................4-16
4.2.19 Side-L assembly, side-R assembly and base assembly ⑦.....................4-17
4.2.20 Feed rollers...............................................................................................4-18
4.3 Locations to lubricate........................................................................................4-19

44951501TH Rev.2 v /
Oki Data CONFIDENTIAL CONTENTS
5. MAINTENANCE MENUS........................................................5-1
5.1 System Maintenance menu (for maintenance personnel)...................................5-2
5.2 Maintenance Utility..............................................................................................5-4
5.3 User maintenance menu functions .....................................................................5-6
5.3.1 Maintenance menu (for end-users)...............................................................5-6
5.3.2 Self-diagnostic mode....................................................................................5-7
5.3.3 Various types of printing on stand-alone basis...........................................5-24
5.3.4 Button functions at power-on......................................................................5-25
5.4 Setup after part replacement ............................................................................5-26
5.4.1 Notes on CU/PU board replacement..........................................................5-26
5.5Manualdensityadjustmentoperation ...............................................................5-28
5.6 Printer ADMIN MENU.......................................................................................5-29
6. PERIODIC MAINTENANCE ...................................................6-1
6.1 Cleaning..............................................................................................................6-2
6.2 LED lens array cleaning......................................................................................6-3
6.3 Pick-up roller cleaning.........................................................................................6-5
6.4 Pinter internal cleaning .......................................................................................6-6
7.TROUBLESHOOTING.............................................................7-1
7.1 Before troubleshooting........................................................................................7-2
7.2 Points to check before dealing with image troubles............................................7-2
7.3 Precautions for dealing with image troubles .......................................................7-2
7.4 Preparation for troubleshooting...........................................................................7-2
7.5 Troubleshooting procedure..................................................................................7-3
7.5.1 LCD messages list........................................................................................7-3
7.5.2 Preparation for troubleshooting ..................................................................7-24
7.5.3 Troubleshooting of image problems ...........................................................7-57
7.5.4 Network troubleshooting ............................................................................7-64
7.5.4.1 ConnectionerrorsoccurbyuseofaWebbrowser
(for C321/C331/C531) ....................................................................7-64
7.5.4.1.1 Has a certificate been created?...................................................7-65
7.5.4.1.2 Is the SSL/TLS setting set to ON?...............................................7-65
7.5.4.1.3ChecktheversionnumberoftheWebbrowser. ..........................7-66
7.5.4.2 Print operation is not possible (for C321/C331/C531) ........................7-67
7.5.4.2.1 Check the OS (Operating System)..............................................7-67
7.5.4.2.2 Has a printer been created?........................................................7-67
7.5.4.2.3 Is the IPP setting set to Enable? .................................................7-67
7.5.4.3 A certificate cannot be created. (for C321/C331/C531) ......................7-67
7.5.4.3.1 Not all the required entry fields are filled in.................................7-67
7.5.4.3.2 The printer is printing...................................................................7-68
7.5.4.4 A certificate cannot be installed. (for C321/C331/C531).................7-68
7.5.4.4.1 The printer IP address has been changed. .................................7-68
7.5.4.4.2 The network card has been initialized. ........................................7-68
7.5.4.4.3 A CSR has been deleted.............................................................7-68
7.5.4.4.4 Install an intermediate Certificate. ..............................................7-69
7.5.4.5 Other questions (for C321/C331/C531) .............................................7-70
7.5.4.5.1 Time required for creation of a certificate....................................7-70
7.5.4.5.2 Communication time when the encryption function is enabled....7-70
7.5.4.5.3 Can encrypted printing be performed without IPP?.....................7-70
7.5.4.5.4Whatwill happen if SSL/TLS is set to OFF after a certificate is
created (or installed)?..................................................................7-70
7.5.4.5.5 How to change the port number..................................................7-70
7.5.4.5.6 The error message “The security certificate was issued by a
company you have not chosen to trust.View the certificate to
determine whether you want to trust the certifying authority” is
displayed......................................................................................7-70
7.5.4.5.7 The error message “Name of security certificate is invalid or does
not match the site name” is displayed..........................................7-71
7.5.4.6 Restrictions when using Internet Explore 7 (for C321/C331/C531) .7-72
7.5.4.6.1WarningindicationwhenSSLisenabledforself-signed
certificates ...................................................................................7-72
7.6 Fuse check........................................................................................................7-73
8. CONNECTION DIAGRAMS ..................................................8-1
8.1 Resistance value checking .................................................................................8-2
8.2 Layout of parts ...................................................................................................8-5
8.3 Firmware revision numbers ..............................................................................8-19
8.3.1 ROM control numbers.................................................................................8-19
8.3.2 Checking and indication of the revision number ........................................8-20
8.3.3 Stamp of maintenance board indication ....................................................8-20

Oki Data CONFIDENTIAL
1.
CONFIGURATION
1.1 System configuration ...................................................................1-2
1.2 Printer configuration ....................................................................1-3
1.3 Optional items ..............................................................................1-4
1.4 Specifications ..............................................................................1-5
1.5 Interface specifications ................................................................1-9

44951501TH Rev.2 1-2 /
Oki Data CONFIDENTIAL 1. CONFIGURATION
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1.1 System configuration
Figure 1-1 show the system configurations of the C301dn,
C321dn, C331dn, C511dn and C531dn printers.
Figure 1-1 System Configuration Diagram

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Oki Data CONFIDENTIAL 1. CONFIGURATION
1.2 Printer configuration
The internal part of the C301dn, C321dn, C331dn, C511dn, and C531dn printers consists of
the following sections:
• Electrophotographic processing section
• Paper paths
• Controllers (CU/PU)
• Operator panel
• Power supplies (high-voltage power supply/low-voltage power supply)
Figure 1-2 shows the configuration of the printers.
Figure 1-2

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Oki Data CONFIDENTIAL 1. CONFIGURATION
1.3 Optional items
The following optional items are available for the C331dn, C511dn, and C531dn printers:
(1) Optional tray (2nd Tray)
(except C301 and C321)
(2) Additional memory (application to C321, C331 and C531)
(3) SD memory card (C531 only)
(authentication printing, encrypted secure printing)

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Oki Data CONFIDENTIAL 1. CONFIGURATION
1.4 Specifications
C531dn C511dn C331dn
Printing
system Xerographic method using LEDs (light emitting diodes) as light sources
Resolution 600 dots/inch (LED head)
600 × 600 dpi/600 × 1200 dpi/600 × 600 dpi × 2 bits (print resolution)
Print color Four colors of yellow, magenta, cyan, and black
CPU Power PC
RAM
capacity 256 MB (Max. 756 MB)
64 MB 128 MB
(Max. 640 MB)
Supported
OSes Windows 7/ Windows
Vista/ Windows Server
2008/ Windows XP/
Windows Server 2003
Mac OS X 10.3.9 to
10.7
See the system
requirements for further
information.
Windows 7/ Windows Vista/ Windows Server 2008/
Windows XP/ Windows Server 2003
Mac OS X 10.3.9 to 10.7
See the system requirements for further
information.
Print
languages PostScript3 emulation PCL5c/PCL XL
emulation
Hiper-C PostScript3 emulation
PCL5c/PCL XL
emulation
Internal
fonts -
Interface USB (supporting Hi-Speed USB), 100BASE-TX/10BASE-T
C531dn C511dn C331dn
Print speed
*1
(at 600 ×
600 dpi or
600 × 1200
dpi)
Color:
26 pages/minute (A4-size plain paper in copy
mode),
10 pages/minute (postcards and label stocks),
12 pages/minute (177g/m2[152kg] or more thick
paper),
14 pages/minute (duplex printing on A4 plain
paper)
Monochrome:
30 pages/minute (A4 plain paper in copy mode),
10 pages/minute (postcards and label stocks),
16 pages/minute (duplex printing on A4 plain
paper)
Color:
22 pages/minute
(A4-size plain paper in
copy mode),
10 pages/minute
(postcards and label
stocks),
12 pages/minute
(189g/m2[163kg] or
more thick paper),
12 pages/minute
(duplex printing on A4
plain paper)
Monochrome:
24 pages/minute (A4
plain paper in copy
mode),
10 pages/minute
(postcards and label
stocks),
13 pages/minute
(duplex printing on A4
plain paper)
Paper size
*2 A4, A5, A6, B5, Letter, Legal 13 inch, Legal 13.5 inch, Legal 14 inch, Executive, 16K (184 × 260 mm), 16K (195 × 270 mm), 16K (197 × 273 mm), Custom,
Postcard, Double-postcard, Envelope, Index Card
Paper type
*2 Plain paper (64g/m2[55kg] to 220g/m2 [151kg]), Postcard, Envelope, Labels
Feed type *2 Automatic feeding byTray 1
Automatic feeding by or manual feeding from the multi-purpose tray
Automatic feeding by a second tray unit (option)