Konica Minolta bizhub 20 User manual

SERVICE MANUAL
2010.052010.05
Ver. 1.0Ver. 1.0

TRADEMARKS
KONICA MINOLTA and the KONICA MINOLTA logo are trademarks or registered trademarks of
KONICA MINOLTA HOLDINGS, INC.
bizhub and PageScope are trademarks or registered trademarks of KONICA MINOLTA
BUSINESS TECHNOLOGIES, INC.
Apple and Macintosh are trademarks of Apple Inc., registered in the United States and other countries.
PCL is either a trademark or a registered trademark of Hewlett-Packard Company in the United States
and other countries.
Windows Vista is either a registered trademark or a trademark of Microsoft Corporation in the United
States and/or other countries.
Microsoft, Windows, Windows Server and Internet Explorer are registered trademarks of Microsoft
Corporation in the United States and/or other countries.
Linux is a registered trademark of Linus Torvalds in the United States and other countries.
PostScript and PostScript3 are either registered trademarks or trademarks of Adobe Systems
Incorporated in the United States and/or other countries.
ENERGY STAR is a U.S. registered mark.
Citrix and MetaFrame are registered trademarks of Citrix Systems, Inc. in the United States.
Intel, Intel Xeon and Pentium are trademarks or registered trademarks of Intel Corporation.
AMD, AMD Athlon, AMD Opteron and combinations thereof, are trademarks of Advanced Micro
Devices, Inc.
PictBridge is a trademark.
Each company whose software title is mentioned in this manual has a Software License Agreement
specific to its proprietary programs.
All other trademarks are the property of their respective owners.
The Fuji Xerox 4024 II is a registered trademark of Fuji Xerox.
The Proprinter XL is a registered trademark of IBM.
The FX-850 is a registered trademark of Epson.
© Copyright KONICAMINOLTA 2010
All rights reserved.
No part of this publication may be reproduced in any form or by any means without permission in writing
from the publisher.
All other product and company names mentioned in this manual are trademarks or registered
trademarks of their respective holders.
Specifications are subject to change without notice.

iConfidential
PREFACE
This service manual contains basic information required for after-sales service of the Laser
Multi-Function Center (hereinafter referred to as "the machine"). This information is vital to the
service personnel to maintain the high printing quality and performance of the machine.
This service manual covers the bizhub 20 machines.
This manual consists of the following chapters:
CHAPTER 1: SPECIFICATIONS
Provides specifications of each model, which enables you to make a comparison of the
different models.
CHAPTER 2: THEORY OF OPERATION
Gives an overview of the printing mechanisms as well as the sensors, actuators, and control
electronics. It aids in understanding the basic principles of operations as well as locating
defects for troubleshooting.
CHAPTER 3: ERROR INDICATION AND TROUBLESHOOTING
Details of error messages and codes that the incorporated self-diagnostic function of the
machine will display if any error or malfunction occurs. If any error message appears, refer
to this chapter to find which parts should be checked or replaced.
The latter half of this chapter provides sample problems that could occur in the main sections
of the machine and related troubleshooting procedures.
CHAPTER 4: PERIODICAL MAINTENANCE
Details of consumable parts and periodical maintenance parts. This chapter also covers
procedures for disassembling and assembling periodical maintenance parts.
CHAPTER 5: DISASSEMBLY/REASSEMBLY
Details of procedures for disassembling and assembling of the machine together with related
notes. The disassembly order flow provided enables you to see at a glance the quickest way
to get to parts involved.
At the start of a disassembly job, you can check the disassembly order flow that guides you
through a shortcut to get to the object parts.
This chapter also covers screw tightening torques and lubrication points to which the
specified lubrications should be applied during assembly jobs.
CHAPTER 6: SERVICE FUNCTIONS
Describes the maintenance mode which is exclusively designed for the purpose of checking
the settings and adjustments using the keys on the panel.
This chapter also covers hidden function menus, which activate settings and functions or
reset the parts life.
CHAPTER 7: CIRCUIT DIAGRAMS, WIRING DIAGRAM
Provides the Circuit Diagrams and Wiring diagram for the connections of the PCBs.

ii Confidential
APPENDIX 1: WORKER SWITCH (WSW)
APPENDIX 2: DELETION OF USER SETTING INFORMATION, etc.
Provides instructions on how to delete such as user setting information recorded in the
machine.
APPENDIX 3: SCREW CATALOGUE
APPENDIX 4: REFERENCES
APPENDIX 5: GLOSSARY
Information in this manual is subject to change due to improvement or redesign of the product.
A thorough understanding of this machine, based on information in this service manual, is
required for maintaining its print quality performance and for improving the practical ability to
find the cause of problems.

iii Confidential
REGULATION
For Europe and Other countries
Radio interference (220 to 240 volt model only)
This machine follows EN55022 (CISPR Publication 22)/Class B.
Before you use this product, make sure that you use one of the following interface cables.
(1) A shielded parallel interface cable with twisted-pair conductors and that it is marked
IEEE 1284 compliant.
(2) A USB cable.
The cable must not be more than 2 meters long.
IEC 60825-1 specification (220 to 240 volt model only)
This machine is a Class 1 laser product as defined in IEC 60825-1 specifications. The label
shown below is attached in countries where it is needed.
This machine has a Class 3B laser diode which produces invisible laser radiation in the laser
unit. You should not open the laser unit under any circumstances.
Caution
Use of controls or adjustments or performance of procedures other than those specified in
this manual may result in hazardous radiation exposure.
For Finland and Sweden
LUOKAN 1 LASERLAITE
KLASS 1 LASER APPARAT
Varoitus!
Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa altistaa
käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle.
Varning
Om apparaten används på annat sätt än i denna Bruksanvisning specificerats, kan
användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laserklass 1.
CLASS 1 LASER PRODUCT
LASER KLASSE 1 PRODUKT
PRODUCTO LASER DE CLASE 1

iv Confidential
Internal laser radiation
Maximum radiation power: 5 mW
Wave length: 770 - 810 nm
Laser class: Class 3B
EU Directive 2002/96/EC and EN50419
(European Union only)
This equipment is marked with the above recycling symbol. It means that at the end of the
life of the equipment you must dispose of it separately at an appropriate collection point and
not place it in the normal domestic unsorted waste stream. This will benefit the environment
for all. (European Union only)

vConfidential
For USA and Canada
Federal Communications Commission (FCC) Declaration of Conformity
(For USA)
Responsible Party: KONICA MINOLTA BUSINESS SOLUTIONS U.S.A., INC.
100 Williams Drive
Ramsey, NJ 07446
Phone: [phone]
declares, that the products
Product name: bizhub 20
complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
Important
A shielded interface cable should be used to ensure compliance with the limits for a Class B
digital device. Changes or modifications not expressly approved by KONICAMINOLTA could
void the user's authority to operate the equipment.

vi Confidential
Industry Canada Compliance Statement (For Canada)
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
Laser Safety (110 to 120 volt model only)
This machine is certified as a Class 1 laser product under the U.S. Department of Health and
Human Services (DHHS) Radiation Performance Standard according to the Radiation
Control for Health and Safety Act of 1968. This means that the machine does not produce
hazardous laser radiation.
Since radiation emitted inside the machine is completely confined within protective housings
and external covers, the laser beam cannot escape from the machine during any phase of
user operation.
FDA Regulations (110 to 120 volt model only)
The U.S. Food and Drug Administration (FDA) has implemented regulations for laser
products manufactured on and after August 2, 1976. Compliance is mandatory for products
marketed in the United States. The following label on the back of the machine indicates
compliance with the FDA regulations and must be attached to laser products marketed in the
United States.
Internal laser radiation
Maximum radiation power: 5 mW
Wave length: 770 - 810 nm
Laser class: Class 3B
COMPLIES WITH 21CFR 1040.10 AND 1040.11 EXCEPT FOR DEVIATIONS
PURSUANT TO LASER NOTICE NO.50, DATED JUNE 24, 2007.

vii Confidential
SAFETY PRECAUTIONS
To use the machine safely
Please keep these instructions for later reference and read them before attempting any
maintenance.
WARNING
Do not use a vacuum cleaner to clean up scattered toner. Doing this might cause the toner
dust to ignite inside the vacuum cleaner, potentially starting a fire. Please carefully clean the
toner dust with a dry, lint-free cloth and dispose of it according to local regulations.
Note :
If there are faxes in the machine's memory, you need to print them or save them before
you turn off the power and unplug the machine.
There are high voltage electrodes
inside the machine. Before you clean
the inside of the machine, make sure
you have unplugged the telephone
line cord first and then the power cord
from the AC power outlet.
Do not handle the plug with wet
hands.
Doing this might cause an electrical
shock.
After you use the machine, some
internal parts are extremely HOT!
To prevent injuries, be careful not to
put your fingers in the areas shown in
the illustration.
The fuser unit is marked with a
caution label.
Please do not remove or damage the
label.
To prevent injuries, be careful not to
put your hands on the edge of the
machine under the scanner cover.
To prevent injuries, be careful not to
put your fingers in the area shown in
the illustrations.

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WARNING
DO not use any type of spray to clean inside or outside of the machine.
Doing this may cause a fire or electrical shock.
WARNING
- When you move the machine, grasp the side hand holds that are under the scanner. DO
NOT carry the machine by holding it at the bottom.
- Use caution when installing or modifying telephone lines. Never touch telephone wires or
jack. Never install telephone wiring during a lightning storm. Never install a telephone wall
jack in a wet location.
- This product must be installed near an AC power outlet that is easily accessible. In case of
an emergency, you must disconnect the power cord from the AC power outlet to shut off
the power completely.
- To reduce the risk of shock or fire, use only a No. 26 AWG or larger telecommunication line
cord.
CAUSION
Lightning and power surges can damage this product! We recommend that you use a quality
surge protection device on the AC power line and on the telephone line, or unplug the cords
during a lightning storm.
WARNING
<IMPORTANT SAFETY INSTRUCTIONS>
When using your telephone equipment, basic safety precautions should always be followed
to reduce the risk of fire, electric shock and injury to people, including the following:
1. Do not use this product near water, for example, near a bath tub, wash bowl, kitchen sink
or washing machine, in a wet basement or near a swimming pool.
2. Avoid using this product during an electrical storm. There may be a remote risk of electric
shock from lightning.
3. Do not use this product to report a gas leak in the vicinity of the leak.
4. Use only the power cord provided with the MACHINE.
SAVE THESE INSTRUCTIONS

ix Confidential
CHOOSING A LOCATION
Place your machine on a flat, stable surface that is free of vibration and shocks, such as a
desk.
Put the machine near a telephone wall jack and a standard, grounded AC power outlet.
Choose a location where the temperature remains between 50°F and 90.5°F (10°C and
32.5°C).
CAUSION
- Avoid placing your machine in a high-traffic area.
- Do not place the machine near heaters, air conditioners, water, chemicals, or refrigerators.
- Do not expose the machine to direct sunlight, excessive heat, moisture, or dust.
- Do not connect your machine to an AC power outlet controlled by wall switches or
automatic timers.
- Disruption of power can wipe out information in the machine’s memory.
- Do not connect your machine to an AC power outlet on the same circuit as large
appliances or other equipment that might disrupt the power supply.
- Avoid interference sources, such as speakers or the base units of cordless phones.

CHAPTER 1
SPECIFICATIONS

Confidential
CHAPTER 1 SPECIFICATIONS
This chapter lists the specifications of each model, which enables you to make a comparison
of different models.
CONTENTS
1. COMPONENTS ............................................................................................................. 1-1
2. SPECIFICATIONS LIST ................................................................................................ 1-2
2.1 Printing ..................................................................................................................1-2
2.2 Functions ............................................................................................................... 1-3
2.3 Electronics and Mechanics....................................................................................1-6
2.4 Network Connectivity.............................................................................................1-7
2.5 Service Information................................................................................................1-8
2.6 Paper ..................................................................................................................... 1-9
2.6.1 Paper handling ........................................................................................... 1-9
2.6.2 Media specifications ................................................................................. 1-10
2.6.3 Type and size of paper ............................................................................. 1-11
2.7 Printable Area...................................................................................................... 1-13
2.8 Print Speeds with Various Settings......................................................................1-19
2.9 Telephone ............................................................................................................ 1-20
2.10 Fax.......................................................................................................................1-21
2.11 List/Report ...........................................................................................................1-23
2.12 Copy ....................................................................................................................1-24
2.13 Document Scanner.............................................................................................. 1-25
2.14 USB Host............................................................................................................. 1-25

1-1 Confidential
1. COMPONENTS
The equipment consists of the following major components:
Fig. 1-1
Driver PCB
Joint Cover ASSY
NCU PCB
Scanner Unit
ADF Unit
Panel Unit
Speaker ASSY
Back Cover
Outer Chute ASSY
Rear Chute ASSY
Fuser Unit
Main PCB
Access Cover
Side Cover L
Side Cover R
Laser Unit
Toner LED PCB Unit ASSY
Paper Tray
High-voltage PS PCB
LVPS PCB
MP Tray Cover ASSY
Process Cover ASSY
Frame Unit

1-2 Confidential
2. SPECIFICATIONS LIST
2.1 Printing
*1 Using 1200 dpi setting (1200 x 1200 dpi) the print speed will be slower.
*2 The time may change if the machine is calibrating or registering itself.
*3 From Ready mode and standard paper tray.
Specifications are subject to change without notice.
Model bizhub 20
Print method
Electrophotography by semiconductor laser beam scanning
Laser Method: 1 polygon motor, 1 laser beam
Wavelength: 770 nm - 810 nm
Output: 5 mW (Max)
Laser class: Class3 B
Resolution 1200 dpi *1,
HQ1200
(2400x600dpi)
Windows
®
2000/XP/ XP Professional x64 Edition, Windows
Vista
®
, Windows
®
7, Windows Server
®
2003/ Windows
Server
®
2003 x 64 Edition, Windows Server
®
2008, Mac
OS
®
X 10.3.9 or greater
600 x 600 dpi
Windows
®
2000/XP/ XP Professional x64 Edition, Windows
Vista
®
, Windows
®
7, Windows Server
®
2003/ Windows
Server
®
2003 x 64 Edition, Windows Server
®
2008, Mac
OS
®
X 10.3.9 or greater
Print mode Normal printing mode
Economy printing mode (Toner saving mode)
Print Speed
(A4/Letter)
Standard Up to 30/32 ppm
* When loading A4 or Letter-size paper from the
standard paper tray.
Duplex A4: Up to 13 sides per minute (6.5 sheets per minute)
Letter: Up to 14 sides per minute (7 sheets per minute)
Warm-up time *2 From sleep mode: less than 18 seconds
From power off →on: less than 35 seconds
First print time *3 Less than 8.5 seconds
Consumables Toner cartridge Life expectancy:
8,000 pages/cartridge
* When printing A4/Letter-size paper in accordance with
ISO/IEC 19752.
Shelf life: 2 years without opening (6 months after
opening)
Drum unit Life expectancy: 25,000 pages/drum unit
Life expectancy will vary depending on number of
continuous printing pages.
* When printing A4/Letter-size paper.
Shelf life: 2 years without opening (6 months after
opening)
The shelf life mentioned above is guaranteed under the normal condition as below;
(Temperature) Normal condition: 0 to 40 °C
* Storage condition at the temperature of 40 to 50 °C: Up to 5 days
* Storage condition at the temperature of -20 to 0 °C: Up to 5 days
(Humidity) Normal condition: 35 to 85 %
* Storage condition at the humidity of 85 to 95 %: Up to 5 days
* Storage condition at the humidity of 10 to 35 %: Up to 5 days

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2.2 Functions
<Controller>
*1 Windows Server®2003 and Windows Server®2008 are supported for netwoking printing
only.
Pararell interface is not supported for Windows Vista®/Windows®7.
<Software>
<Viewer>
Specifications are subject to change without notice.
Model bizhub 20
CPU (clock speed ) 300 MHz
Back up Clock Yes (up to 60 hours)
Memory Standard 64 MB
Option 1 DIMM slot; expandable up to 576 MB
Backup Yes (up to 60 hours)
Interface *1 IEEE 1284 Parallel, Hi-Speed USB 2.0,
Ethernet 10/100 BASE-TX, USB Host
Emulation PCL6, BR-Script 3 (PostScript®3™), IBM Pro-printer XL,
Epson FX-850
Network
Connectivity
Protocol TCP/IP(10/100 BASE-TX Ethernet)
Management tool BRAdmin Light, Web Based Management
Resident fonts PCL 66 scalable fonts, 12 bitmap fonts, 13 bar codes
BR-Script 3
(PostScript®3™)
66 scalable fonts
Model bizhub 20
Printer driver Windows®Host-Based Driver for Windows
®
2000 Professional/
XP/XP Professional x64 Edition/Windows Vista
®
/
Windows
®
7/Windows Server
®
2003/Windows Server
®
2003 x64 Edition/Windows Server
®
2008
BR-Script3 (PPD file) for Windows
®
2000 Professional/XP/
XP Professional x64 Edition/Windows Vista
®
/Windows
®
7/
Windows Server
®
2003/Windows Server
®
2003 x64 Edition
/Windows Server
®
2008
Macintosh® Macintosh Printer Driver for Mac OS
®
X 10.3.9 or greater
BR-Script 3 (PPD file for Mac OS
®
X 10.3.9 or greater)
Model bizhub 20
Viewer Windows®PaperPort 11 SE
Macintosh®
Page Manager 7

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<PC-Fax>
<Configuration Tool>
<Network Utility>
<Direct Print feature>
*1 PDF data including a JBIG2 images files, a JPEG2000 image file or transparency files are
not supported.
Specifications are subject to change without notice.
Model bizhub 20
Windows®Send Yes
Receive Yes
Macintosh®Send Yes
Receive No
Model bizhub 20
Control Center Windows®Yes (CC3)
Macintosh®
Mac (CC2)
Remote Setup Windows®Yes
Macintosh®Yes
Model bizhub 20
Windows®BRAdmin Light, Web Base Management, Network
Remote Setup
Macintosh®BRAdmin Light, Web Base Management, Network
Remote Setup
Model bizhub 20
Direct Print PDF version1.7*1, JPEG, Exif+JPEG, PRN(created by
bizhub 20 printer driver), TIFF (scanned by bizhub 20),
PostScript
®
3™ (created by BR-Script3 printer driver),
XPS version 1.0.

1-5 Confidential
<System requirements for printing function>
Specifications are subject to change without notice.
Computer Platform &
Operating System Version Processor Speed Minimum RAM
Recom-
mended
RAM
Available
Hard
Disk
Space
Windows®Windows®7 Intel®Pentium®4 or
equivalent 64-bit
(Intel®64 or AMD64)
supported CPU
1GB
(32-bit)
2GB
(64-bit)
1GB
(32-bit)
2GB
(64-bit)
650MB
Windows
Vista®
512MB 1GB 500MB
Windows
Server®2003
x64 Edition
AMD Opteron™
AMD Athlon™ 64
Intel®Xeon™ with Intel®
EM64T
Intel®Pentium®with
Intel®EM64T or
equivalent
256MB 512MB 50MB
Windows®XP
Professional
x64 Edition
AMDOpteron™
AMDAthlon™64
Intel®Xeon®with Intel®
EM64T
Intel®Pentium®4 with
Intel®EM64T or
equivalent
256MB 512MB 50MB
Windows
Server®2008
R2
64-bit (Intel®64 or
AMD64) supported CPU
512MB 2GB 50MB
Windows
Server®2008
Intel®Pentium®4 or
equivalent 64-bit
(Intel®64 or AMD64)
supported CPU
512MB 2GB 50MB
Windows
Server®2003
Intel®Pentium®III or
equivalent
256MB 512MB 50MB
Windows®XP
Home Edition
Intel®Pentium®or
equivalent
128MB 256MB 50MB
Windows®XP
Professional
Windows®
2000
Professional
64MB 256MB 50MB
Apple®
Macintosh®OS®X
10.3.9 - 10.4.3
Power PC G4/G5, Power
PC G3 350MHz
128MB 256MB 80MB
OS®X
10.4.4 or
greater
Power PC G4/G5, Intel®
Core™ Processor
512MB 1GB 80MB

1-6 Confidential
2.3 Electronics and Mechanics
Specifications are subject to change without notice.
Model bizhub 20
Power
consumption
Copying Average 680 W at 25 °C (77 °F)
Ready Average 85 W at 25 °C (77 °F)
Sleep Average
18 W at 25 °C
Noise level Sound Pressure Printing: 56 dB (A)
Ready: 30 dB (A)
Sound power Printing: LWAd = 6.95 Bell (A)
Ready: LWAd = 4.6 Bell (A)
Environment Temperature Operating: 10 to 32.5°C (50 to 90.5 °F)
Non operating: 0 to 40°C (38 to 104 °F)
Storage: -20 to 40°C (-4 to 104 °F)
Humidity Operating: 20 to 80 % (non condensing)
Storage: 10 to 85 % (non condensing)
Dimensions (W x D x H) 531 x 451 x 475 mm (20.9 x 17.8 x 18.7 in.)
Weight
Without Carton with drum unit and
toner cartridge
Approx. 18.6 kg
(41.0 lb)
LCD Size 22 characters x 5 lines (Full Dot)
maximum message is 16 characters
LCD Back-Lit Yes (1-color) - white

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2.4 Network Connectivity
<Ethernet wired network>
Specifications are subject to change without notice.
Network node type NC-6800h type2
Operating system
support
Windows®2000 Professional, Windows®XP, Windows®7, Windows®
XP Professional x64 Edition, Windows Vista®, Windows Server®2003,
Windows Server®2003 x64 Edition, Windows Server®2008
Mac OS®X 10.3.9 or greater
Protocol support TCP/IP: IPv4 ARP, RARP, BOOTP, DHCP, APIPA (Auto IP),
WINS/NetBIOS name resolution, DNS Resolver,
mDNS, LLMNR responder, LPR/LPD, Custom Raw
Port/Port9100, IPP/IPPS, FTP Client and Server,
TELNET Server, HTTP/HTTPS Server, SSL/TLS,
TFTP Client and Server, SMTP Client, APOP, POP
before SMTP, SMTP AUTH, SNMPv1/v2c/v3, ICMP,
LLTD responder, Web Services Print, CIFS Client,
SNTP, LDAP, POP3/SMTP
TCP/IP: IPv6 (Turned off as default) NDP, RA, DNS resolver,
mDNS, LLMNR responder, LPR/LPD, Custom Raw
Port/Port9100, IPP/IPPS, FTP Client and Server,
TELNET Server, HTTP/HTTPS server, SSL/TLS,
TFTP Client and Server, SMTP Client, APOP, POP
before SMTP, SMTP AUTH, SNMPv1/v2c/v3,
ICMPv6, LLTD responder, Web Services Print, CIFS
Client, SNTP, LDAP, POP3/SMTP
Network type 10/100 BASE-TX Ethernet network
Network printing Windows®7, Windows Vista®, Windows Server®2003, Windows®XP
and Windows®2000 TCP/IP printing
Mac OS®X 10.3.9 or greater printing
Management utility PageScope Net Care Device Manager
Web Based Management
(Printer and print server management through web browser)
recommend Microsoft Internet Explorer 6.0 (or greater), Fire fox 1.0 (or
greater) for Windows
Safar: 1.2 (or greater) for Macintosh
BRAdmin Light for Windows and Macintosh
(Printer and print server management through web browser)
recommend Microsoft Internet Explorer 6.0 (or greater), Fire fox 1.0 (or
greater) for Windows
Safar: 1.2 (or greater) for Macintosh