Minolta C20 Service manual

SERVICE MANUAL

FIELD SERVICE

2008.092008.09
Ver. 1.0Ver. 1.0

FIELD SERVICE TOTAL CONTENTS

SAFETY AND IMPORTANT WARNING ITEMS ..............................................................S-1

IMPORTANT NOTICE ................................................................................................S-1

DESCRIPTION ITEMS FOR DANGER, WARNING AND CAUTION .........................S-1

SAFETY WARNINGS .................................................................................................S-2

WARNING INDICATIONS ON THE MACHINE ........................................................S-19

MEASURES TO TAKE IN CASE OF AN ACCIDENT ....................................................S-22

Composition of the service manual ................................................................................. C-1

Notation of the service manual ....................................................................................... C-2

bizhub C20 Main body

Outline ............................................................................................................................ 1

Maintenance ................................................................................................................... 5

Adjustment/Setting...................................................................................................... 115

Troubleshooting........................................................................................................... 321

Appendix..................................................................................................................... 379

Auto Document Feeder Unit

Outline ............................................................................................................................ 1

Maintenance ................................................................................................................... 3

Adjustment/Setting........................................................................................................ 15

Troubleshooting............................................................................................................. 25

Lower Feeder Unit

Outline ............................................................................................................................ 1

Maintenance ................................................................................................................... 3

Adjustment/Setting........................................................................................................ 13

Troubleshooting............................................................................................................. 15

i

Blank Page

ii

SAFETY AND IMPORTANT WARNING ITEMS

SAFETY AND IMPORTANT WARNING ITEMS

Read carefully the safety and important warning Items described below to understand them
before doing service work.

IMPORTANT NOTICE

Because of possible hazards to an inexperienced person servicing this product as well as
the risk of damage to the product, KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
(hereafter called the KMBT) strongly recommends that all servicing be performed only by
KMBT-trained service technicians.
Changes may have been made to this product to improve its performance after this Service
Manual was printed. Accordingly, KMBT does not warrant, either explicitly or implicitly, that
the information contained in this service manual is complete and accurate.
The user of this service manual must assume all risks of personal injury and/or damage to
the product while servicing the product for which this service manual is intended.
Therefore, this service manual must be carefully read before doing service work both in the
course of technical training and even after that, for performing maintenance and control of
the product properly.
Keep this service manual also for future service.

DESCRIPTION ITEMS FOR DANGER, WARNING AND CAUTION

In this service manual, each of three expressions “ DANGER”, “ WARNING”, and
“ CAUTION” is defined as follows together with a symbol mark to be used in a limited
meaning.
When servicing the product, the relevant works (disassembling, reassembling, adjustment,
repair, maintenance, etc.) need to be conducted with utmost care.

DANGER: Action having a high possibility of suffering death or serious injury

WARNING: Action having a possibility of suffering death or serious injury

CAUTION: Action having a possibility of suffering a slight wound, medium

trouble, and property damage

Symbols used for safety and important warning items are defined as follows:

:Precaution when servicing the

product.

:Prohibition when servicing the

product.

:Direction when servicing the

product.

General

precaution

General

prohibition

General

instruction

Electric hazard High temperature

Do not touch

with wet hand

Unplug Ground/Earth

Do not

disassemble

S-1

SAFETY AND IMPORTANT WARNING ITEMS

SAFETY WARNINGS

[1] MODIFICATIONS NOT AUTHORIZED BY KONICA MINOLTA

BUSINESS TECHNOLOGIES, INC.

KONICA MINOLTA brand products are renowned for their high reliability. This reliability is
achieved through high-quality design and a solid service network.
Product design is a highly complicated and delicate process where numerous mechanical,
physical, and electrical aspects have to be taken into consideration, with the aim of arriving
at proper tolerances and safety factors. For this reason, unauthorized modifications involve
a high risk of degradation in performance and safety. Such modifications are therefore
strictly prohibited. the points listed below are not exhaustive, but they illustrate the reason­ing behind this policy.

Prohibited Actions

DANGER

• Using any cables or power cord not specified by KMBT.

• Using any fuse or thermostat not specified by KMBT.
Safety will not be assured, leading to a risk of fire and
injury.

• Disabling fuse functions or bridging fuse terminals with
wire, metal clips, solder or similar object.

• Disabling relay functions (such as wedging paper between
relay contacts)

• Disabling safety functions (interlocks, safety circuits, etc.)
Safety will not be assured, leading to a risk of fire and
injury.

• Making any modification to the product unless instructed
by KMBT

• Using parts not specified by KMBT

S-2

SAFETY AND IMPORTANT WARNING ITEMS

[2] POWER PLUG SELECTION

In some countries or areas, the power plug provided with the product may not fit wall outlet
used in the area. In that case, it is obligation of customer engineer (hereafter called the CE)
to attach appropriate power plug or power cord set in order to connect the product to the
supply.

Power Cord Set or Power Plug

WARNING

• Use power supply cord set which meets the following
criteria:

- provided with a plug having configuration intended for
the connection to wall outlet appropriate for the prod­uct's rated voltage and current, and

- the plug has pin/terminal(s) for grounding, and

- provided with three-conductor cable having enough cur­rent capacity, and

- the cord set meets regulatory requirements for the area.

Use of inadequate cord set leads to fire or electric shock.

• Attach power plug which meets the following criteria:

- having configuration intended for the connection to wall
outlet appropriate for the product's rated voltage and
current, and

- the plug has pin/terminal(s) for grounding, and

- meets regulatory requirements for the area.

Use of inadequate cord set leads to the product connect­ing to inadequate power supply (voltage, current capacity,
grounding), and may result in fire or electric shock.

• Conductors in the power cable must be connected to ter­minals of the plug according to the following order:

• Black or Brown: L (line)

• White or Light Blue: N (neutral)

• Green/Yellow: PE (earth)

Wrong connection may cancel safeguards within the
product, and results in fire or electric shock.

kw

S-3

SAFETY AND IMPORTANT WARNING ITEMS

[3] CHECKPOINTS WHEN PERFORMING ON-SITE SERVICE

KONICA MINOLTA brand products are extensively tested before shipping, to ensure that all
applicable safety standards are met, in order to protect the customer and customer engi­neer (hereafter called the CE) from the risk of injury. However, in daily use, any electrical
equipment may be subject to parts wear and eventual failure. In order to maintain safety
and reliability, the CE must perform regular safety checks.

1. Power Supply

Connection to Power Supply

WARNING

• Check that mains voltage is as specified.

Connection to wrong voltage supply may result in fire or
electric shock.

• Connect power plug directly into wall outlet having same
configuration as the plug.

Use of an adapter leads to the product connecting to
inadequate power supply (voltage, current capacity,
grounding), and may result in fire or electric shock.

If proper wall outlet is not available, advice the customer
to contact qualified electrician for the installation.

• Plug the power cord into the dedicated wall outlet with a
capacity greater than the maximum power consumption.

If excessive current flows in the wall outlet, fire may
result.

• If two or more power cords can be plugged into the wall
outlet, the total load must not exceed the rating of the wall
outlet.

If excessive current flows in the wall outlet, fire may
result.

• Make sure the power cord is plugged in the wall outlet
securely.

Contact problems may lead to increased resistance,
overheating, and the risk of fire.

kw

• Check whether the product is grounded properly.

If current leakage occurs in an ungrounded product, you
may suffer electric shock while operating the product.
Connect power plug to grounded wall outlet.

S-4

SAFETY AND IMPORTANT WARNING ITEMS

Power Plug and Cord

WARNING

• When using the power cord set (inlet type) that came with
this product, make sure the connector is securely inserted
in the inlet of the product.
When securing measure is provided, secure the cord with
the fixture properly.

If the power cord (inlet type) is not connected to the prod­uct securely, a contact problem may lead to increased
resistance, overheating, and risk of fire.

• Check whether the power cord is not stepped on or
pinched by a table and so on.

Overheating may occur there, leading to a risk of fire.

• Check whether the power cord is damaged. Check
whether the sheath is damaged.

If the power plug, cord, or sheath is damaged, replace
with a new power cord (with plug and connector on each
end) specified by KMBT. Using the damaged power cord
may result in fire or electric shock.

• Do not bundle or tie the power cord.

Overheating may occur there, leading to a risk of fire.

• Check whether dust is collected around the power plug
and wall outlet.

Using the power plug and wall outlet without removing
dust may result in fire.

• Do not insert the power plug into the wall outlet with a wet
hand.

The risk of electric shock exists.

• When unplugging the power cord, grasp the plug, not the
cable.

The cable may be broken, leading to a risk of fire and
electric shock.

S-5

SAFETY AND IMPORTANT WARNING ITEMS

Wiring

WARNING

• Never use multi-plug adapters to plug multiple power cords
in the same outlet.

If used, the risk of fire exists.

• When an extension cord is required, use a specified one.
Current that can flow in the extension cord is limited, so
using a too long extension cord may result in fire.

Do not use an extension cable reel with the cable taken
up. Fire may result.

2. Installation Requirements

Prohibited Installation Places

WARNING

• Do not place the product near flammable materials or vola­tile materials that may catch fire.

A risk of fire exists.

• Do not place the product in a place exposed to water such
as rain.

A risk of fire and electric shock exists.

When not Using the Product for a long time

WARNING

• When the product is not used over an extended period of
time (holidays, etc.), switch it off and unplug the power
cord.

Dust collected around the power plug and outlet may
cause fire.

S-6

SAFETY AND IMPORTANT WARNING ITEMS

Ventilation

CAUTION

• The product generates ozone gas during operation, but it
will not be harmful to the human body.

If a bad smell of ozone is present in the following cases,

ventilate the room.
a. When the product is used in a poorly ventilated room
b. When taking a lot of copies

c. When using multiple products at the same time

Stability

CAUTION

• Be sure to lock the caster stoppers.

In the case of an earthquake and so on, the product may

slide, leading to a injury.

Inspection before Servicing

CAUTION

• Before conducting an inspection, read all relevant docu­mentation (service manual, technical notices, etc.) and
proceed with the inspection following the prescribed pro­cedure in safety clothes, using only the prescribed tools.
Do not make any adjustment not described in the docu­mentation.

If the prescribed procedure or tool is not used, the prod­uct may break and a risk of injury or fire exists.

• Before conducting an inspection, be sure to disconnect
the power plugs from the product and options.

When the power plug is inserted in the wall outlet, some
units are still powered even if the POWER switch is
turned OFF. A risk of electric shock exists.

• The area around the fixing unit is hot.

You may get burnt.

S-7

SAFETY AND IMPORTANT WARNING ITEMS

Work Performed with the Product Powered On

WARNING

• Take every care when making adjustments or performing
an operation check with the product powered.

If you make adjustments or perform an operation check
with the external cover detached, you may touch live or
high-voltage parts or you may be caught in moving gears
or the timing belt, leading to a risk of injury.

• Take every care when servicing with the external cover
detached.

High-voltage exists around the drum unit. A risk of elec­tric shock exists.

Safety Checkpoints

WARNING

• Check the exterior and frame for edges, burrs, and other
damage.

The user or CE may be injured.

• Do not allow any metal parts such as clips, staples, and
screws to fall into the product.

They can short internal circuits and cause electric shock
or fire.

• Check wiring for squeezing and any other damage.

Current can leak, leading to a risk of electric shock or
fire.

• Carefully remove all toner remnants and dust from electri­cal parts and electrode units such as a charging corona
unit.

Current can leak, leading to a risk of product trouble or
fire.

• Check high-voltage cables and sheaths for any damage.

Current can leak, leading to a risk of electric shock or
fire.

S-8

SAFETY AND IMPORTANT WARNING ITEMS

Safety Checkpoints

WARNING

• Check electrode units such as a charging corona unit for
deterioration and sign of leakage.

Current can leak, leading to a risk of trouble or fire.

• Before disassembling or adjusting the write unit (P/H unit)
incorporating a laser, make sure that the power cord has
been disconnected.

The laser light can enter your eye, leading to a risk of
loss of eyesight.

• Do not remove the cover of the write unit. Do not supply
power with the write unit shifted from the specified mount­ing position.

The laser light can enter your eye, leading to a risk of
loss of eyesight.

• When replacing a lithium battery, replace it with a new lith­ium battery specified in the Parts Guide Manual. Dispose
of the used lithium battery using the method specified by
local authority.

Improper replacement can cause explosion.

• After replacing a part to which AC voltage is applied (e.g.,
optical lamp and fixing lamp), be sure to check the installa­tion state.

A risk of fire exists.

• Check the interlock switch and actuator for loosening and
check whether the interlock functions properly.

If the interlock does not function, you may receive an
electric shock or be injured when you insert your hand in
the product (e.g., for clearing paper jam).

• Make sure the wiring cannot come into contact with sharp
edges, burrs, or other pointed parts.

Current can leak, leading to a risk of electric shock or
fire.

S-9

SAFETY AND IMPORTANT WARNING ITEMS

Safety Checkpoints

WARNING

• Make sure that all screws, components, wiring, connec­tors, etc. that were removed for safety check and mainte­nance have been reinstalled in the original location. (Pay
special attention to forgotten connectors, pinched cables,
forgotten screws, etc.)

A risk of product trouble, electric shock, and fire exists.

Handling of Consumables

WARNING

• Toner and developer are not harmful substances, but care
must be taken not to breathe excessive amounts or let the
substances come into contact with eyes, etc. It may be
stimulative.

If the substances get in the eye, rinse with plenty of water
immediately. When symptoms are noticeable, consult a
physician.

• Never throw the used cartridge and toner into fire.

You may be burned due to dust explosion.

Handling of Service Materials

CAUTION

• Unplug the power cord from the wall outlet.

Drum cleaner (isopropyl alcohol) and roller cleaner (ace­tone-based) are highly flammable and must be handled
with care. A risk of fire exists.

• Do not replace the cover or turn the product ON before
any solvent remnants on the cleaned parts have fully
evaporated.

A risk of fire exists.

S-10

SAFETY AND IMPORTANT WARNING ITEMS

Handling of Service Materials

CAUTION

• Use only a small amount of cleaner at a time and take
care not to spill any liquid. If this happens, immediately
wipe it off.

A risk of fire exists.

• When using any solvent, ventilate the room well.

Breathing large quantities of organic solvents can lead to

discomfort.

S-11

SAFETY AND IMPORTANT WARNING ITEMS

[4] Used Batteries Precautions

ALL Areas

CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the manufacturer.
Dispose of used batteries according to the manufacturer’s instructions.

Germany

VORSICHT!
Explosionsgefahr bei unsachgemäßem Austausch der Batterie.
Ersatz nur durch denselben oder einen vom Hersteller empfohlenen gleichwertigen Typ.
Entsorgung gebrauchter Batterien nach Angaben des Herstellers.

France

AT TE N T IO N
Il y a danger d’explosion s’il y a remplacement incorrect de la batterie.
Remplacer uniquement avec une batterie du même type ou d’un type équivalent recom­mandé par le constructeur.
Mettre au rebut les batteries usagées conformément aux instructions du fabricant.

Denmark

Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.

Finland, Sweden

Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.

ADVARSEL!

VAROlTUS

VARNING

Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en ekvivalent typ som rekommenderas av apparat­tillverkaren.
Kassera använt batteri enligt fabrikantens instruktion.

Norway

Eksplosjonsfare ved feilaktig skifte av batteri.
Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten.
Brukte batterier kasseres i henhold til fabrikantens instruksjoner.

ADVARSEL

S-12

SAFETY AND IMPORTANT WARNING ITEMS

[5] Laser Safety

• This is a digital machine certified as a Class 1 laser product. There is no possibility of
danger from a laser, provided the machine is serviced according to the instruction in this
manual.

5.1 Internal Laser Radiation

semiconductor laser

Maximum power of the laser diode 15 mW

Maximum average radiation power (*) 8.5 µW

Wavelength 770-800 nm

*at laser aperture of the Print Head Unit

• This product employs a Class 3B laser diode that emits an invisible laser beam. The
laser diode and the scanning polygon mirror are incorporated in the print head unit.

• The print head unit is NOT A FIELD SERVICEABLE ITEM. Therefore, the print head unit
should not be opened under any circumstances.

Laser Aperture of
the Print Head Unit

A0FDP0C502DA

S-13

SAFETY AND IMPORTANT WARNING ITEMS

U.S.A., Canada
(CDRH Regulation)

• This machine is certified as a Class 1 Laser product under Radiation Performance Stan­dard according to the Food, Drug and Cosmetic Act of 1990. Compliance is mandatory
for Laser products marketed in the United States and is reported to the Center for
Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration of
the U.S. Department of Health and Human Services (DHHS). This means that the device
does not produce hazardous laser radiation.

• The label shown on page S-16 indicates compliance with the CDRH regulations and
must be attached to laser products marketed in the United States.

.

CAUTION

• Use of controls, adjustments or performance of procedures other than those
specified in this manual may result in hazardous radiation exposure.

semiconductor laser

Maximum power of the laser diode 15 mW

Wavelength 770-800 nm

All Areas

CAUTION

• Use of controls, adjustments or performance of procedures other than those
specified in this manual may result in hazardous radiation exposure.

semiconductor laser

Maximum power of the laser diode 15 mW

Wavelength 770-800 nm

Denmark

ADVARSEL

• Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion.
Undgå udsættelse for stråling. Klasse 1 laser produkt der opfylder IEC60825-1
sikkerheds kravene.

halvlederlaser

Laserdiodens højeste styrke 15 mW

bølgelængden 770-800 nm

S-14

SAFETY AND IMPORTANT WARNING ITEMS

Finland, Sweden

LUOKAN 1 LASERLAITE
KLASS 1 LASER APPARAT

VAR OITU S!

• Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saat­taa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle laser­säteilylle.

puolijohdelaser

Laserdiodin suurin teho 15 mW

aallonpituus 770-800 nm

VARNING!

• Om apparaten används på annat sätt än i denna bruksanvisning specificerats,
kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för
laserklass 1.

halvledarlaser

Den maximala effekten för laserdioden 15 mW

våglängden 770-800 nm

VAR O!

• Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättomälle laser­säteilylle. Älä katso säteeseen.

VARNING!

• Osynlig laserstråining när denna del är öppnad och spärren är urkopplad.
Betrakta ej stråien.

Norway

ADVERSEL

• Dersom apparatet brukes på annen måte enn spesifisert i denne bruksanvisn­ing, kan brukeren utsettes för unsynlig laserstrålning, som overskrider grensen
for laser klass 1.

halvleder laser

Maksimal effekt till laserdiode 15 mW

bølgelengde 770-800 nm

S-15

SAFETY AND IMPORTANT WARNING ITEMS

5.2 Laser Safety Label

• A laser safety label is attached to the inside of the machine as shown below.

S-16

A0FDP0E500DA

SAFETY AND IMPORTANT WARNING ITEMS

5.3 Laser Caution Label

• A laser caution label is attached to the outside of the machine as shown below.

A0FDP0E501DA

S-17

SAFETY AND IMPORTANT WARNING ITEMS

5.4 PRECAUTIONS FOR HANDLING THE LASER EQUIPMENT

• When laser protective goggles are to be used, select ones with a lens conforming to the
above specifications.

• When a disassembly job needs to be performed in the laser beam path, such as when
working around the printerhead and PC Drum, be sure first to turn the printer OFF.

• If the job requires that the printer be left ON, take off your watch and ring and wear laser
protective goggles.

• A highly reflective tool can be dangerous if it is brought into the laser beam path. Use
utmost care when handling tools on the user’s premises.

• The Print Head is not to be disassembled or adjusted in the field. Replace the Unit or
Assembly including the Control Board. Therefore, remove the Laser Diode, and do not
perform Control Board trimmer adjustment.

S-18

SAFETY AND IMPORTANT WARNING ITEMS

WARNING INDICATIONS ON THE MACHINE

Caution labels shown are attached in some areas on/in the machine.
When accessing these areas for maintenance, repair, or adjustment, special care should
be taken to avoid burns and electric shock.

High voltage

• This area generates high voltage.
Be careful not to touch here when the power is
turned ON to avoid getting an electric shock.

CAUTION

• The area around the
Fuser Unit is extremely
hot.
Touching any part other
than those indicated
may result in burns.

A0FDP0C503DA

S-19

SAFETY AND IMPORTANT WARNING ITEMS

High voltage

• This area generates high
voltage.
Be careful not to touch here
when the power is turned
ON to avoid getting an elec­tric shock.

High voltage

• This area generates high
voltage.
Be careful not to touch here
when the power is turned
ON to avoid getting an elec­tric shock.

S-20

A0FDP0C504DA

SAFETY AND IMPORTANT WARNING ITEMS

P

U

S

H

Y

WARNING

• Do not burn used Print Units.
Toner expelled from the fire is dangerous.

WARNING

• Do not burn used Waste Toner Bottle.
Toner expelled from the fire is dangerous.

Y

WARNING

• Do not burn used Toner Cartridge.
Toner expelled from the fire is dangerous.

A00FP0C504DA

CAUTION:

• You may be burned or injured if you touch any area that you are advised by any
caution label to keep yourself away from. Do not remove caution labels. And also,
when the caution label is peeled off or soiled and cannot be seen clearly, replace
it with a new caution label.

S-21

MEASURES TO TAKE IN CASE OF AN ACCIDENT

MEASURES TO TAKE IN CASE OF AN
ACCIDENT

1. If an accident has occurred, the distributor who has been notified first must immediately
take emergency measures to provide relief to affected persons and to prevent further
damage.

2. If a report of a serious accident has been received from a customer, an on-site evalua­tion must be carried out quickly and KMBT must be notified.

3. To determine the cause of the accident, conditions and materials must be recorded
through direct on-site checks, in accordance with instructions issued by KMBT.

4. For reports and measures concerning serious accidents, follow the regulations speci­fied by every distributor.

S-22

Composition of the service manual

This service manual consists of Theory of Operation section and Field Service section to
explain the main machine and its corresponding options.

Theory of Operation section gives, as information for the CE to get a full understanding of
the product, a rough outline of the object and role of each function, the relationship
between the electrical system and the mechanical system, and the timing of operation of
each part.

Field Service section gives, as information required by the CE at the site (or at the cus­tomer’s premise), a rough outline of the service schedule and its details, maintenance
steps, the object and role of each adjustment, error codes and supplementary information.

The basic configuration of each section is as follows. However some options may not be
applied to the following configuration.

<Theory of Operation section>

OUTLINE: Explanation of system configuration,

product specifications, unit configuration, and paper path

COMPOSITION/OPERATION: Explanation of configuration of each unit,

operating system, and control system

<Field service section>

OUTLINE: Explanation of system configuration, and product

specifications

MAINTENANCE: Explanation of service schedule, maintenance steps, ser-

vice tools, removal/reinstallation methods of major parts,
and firmware version up method etc.

ADJUSTMENT/SETTING: Explanation of utility mode, service mode, and mechanical

adjustment etc.

TROUBLESHOOTING: Explanation of lists of jam codes and error codes, and

their countermeasures etc.

APPENDIX: Parts layout drawings, connector layout drawings, timing

chart, overall layout drawing are attached.

C-1

Notation of the service manual

A. Product name

In this manual, each of the products is described as follows:

bizhub C20 Main body

(1)
(2) Microsoft Windows NT 4.0: Windows NT 4.0 or Windows NT

Microsoft Windows 2000: Windows 2000

Microsoft Windows XP: Windows XP

Microsoft Windows Vista: Windows Vista

When the description is made in combination of the OS’s mentioned above:

Windows NT 4.0/2000

Windows NT/2000/XP/Vista

B. Brand name

The company names and product names mentioned in this manual are the brand name or
the registered trademark of each company.

C. Feeding direction

• When the long side of the paper is parallel with the feeding direction, it is called short

edge feeding. The feeding direction which is perpendicular to the short edge feeding is
called the long edge feeding.

• Short edge feeding will be identified with [S (abbreviation for Short edge feeding)] on the

paper size. No specific notation is added for the long edge feeding.
When the size has only the short edge feeding with no long edge feeding, [S] will not be
added to the paper size.

<Sample notation>

Paper size Feeding direction Notation

A4

A3 Short edge feeding A3

Long edge feeding A4

Short edge feeding A4S

C-2

SERVICE MANUAL

FIELD SERVICE

Main body

2008.09
Ver. 1.0

Revision history

After publication of this service manual, the parts and mechanism may be subject to change for
improvement of their performance.
Therefore, the descriptions given in this service manual may not coincide with the actual machine.

When any change has been made to the descriptions in the service manual, a revised version will be
issued with a revision mark added as required.

Revision mark:

• To indicate clearly a section revised, is shown at the left margin of the revised section.
The number inside represents the number of times the revision has been made.

1

1

• To indicate clearly a page that contains the revision, is shown near the page number of the
corresponding page.
The number inside represents the number of times the revision has been made.

NOTE

Revision marks shown in a page are restricted only to the latest ones with the old ones deleted.

• When a page revised in Ver. 2.0 has been changed in Ver. 3.0:
The revision marks for Ver. 3.0 only are shown with those for Ver. 2.0 deleted.

• When a page revised in Ver. 2.0 has not been changed in Ver. 3.0:
The revision marks for Ver. 2.0 are left as they are.

1

1

2008/09 1.0 — Issue of the first edition

Date Service manual Ver. Revision mark Descriptions of revision

Field Service Ver. 1.0 Sep. 2008

CONTENTS

bizhub C20 Main body

Outline

1. System configuration............................................................................................... 1

2. Product specifications ............................................................................................. 2

2.1 Fax specifications ................................................................................................. 4

Maintenance

3. Periodical check ...................................................................................................... 5

3.1 Maintenance items................................................................................................ 5

3.1.1 Parts to be replaced by users (CRU) ............................................................ 5

3.1.2 Parts to be replaced by a service engineer (FRU) ........................................ 6

3.2 Maintenance parts ................................................................................................ 6

3.2.1 Replacement parts ........................................................................................ 6

3.3 Concept of parts life.............................................................................................. 7

3.4 Maintenance Procedure (periodical check parts) .................................................8

3.4.1 Replacing the tray 2 feed roller ..................................................................... 8

3.4.2 Replacing the tray 1 feed roller ..................................................................... 9

3.4.3 Replacing the ozone filter............................................................................ 12

3.4.4 Replacing the toner cartridge (C/M/Y/K)..................................................... 13

3.4.5 Replacing the imaging unit (C,M,Y,K) ......................................................... 16

3.4.6 Replacing the waste toner bottle................................................................. 20

3.4.7 Replacing the transfer roller ........................................................................ 21

3.4.8 Replacing the transfer belt .......................................................................... 23

3.4.9 Replacing the fuser unit .............................................................................. 26

4. Service tool ........................................................................................................... 28

4.1 Service material list ............................................................................................ 28

4.2 CE tool list........................................................................................................... 28

5. Remote Setup Utility ............................................................................................. 29

5.1 About RSU.......................................................................................................... 29

5.2 Outline ................................................................................................................ 29

5.2.1 Corresponding OS ...................................................................................... 29

5.2.2 PC environments......................................................................................... 29

5.3 Connection methods........................................................................................... 29

5.3.1 Remote connection (Phone line connection) .............................................. 29

5.3.2 Local connection (USB connection) ............................................................ 30

bizhub C20Outline

MaintenanceAdjustment / Setting

Troubleshooting

Appendix

i

5.4 Setup.................................................................................................................. 30

5.4.1 Setup of PC ................................................................................................ 30

5.4.2 Connection and access of user machine.................................................... 30

bizhub C20

5.5 Operation............................................................................................................ 32

5.5.1 Job list......................................................................................................... 32

5.5.2 New (Dial setting) ....................................................................................... 32

5.5.3 Open File .................................................................................................... 35

5.5.4 Update Firmware ........................................................................................ 36

5.5.5 Clear Memory Data .................................................................................... 37

Outline

5.5.6 Clear SRAM Data ....................................................................................... 38

5.6 Function setting.................................................................................................. 39

5.7 Troubleshooting .................................................................................................. 41

5.7.1 Error message list....................................................................................... 41

6. Firmware upgrade................................................................................................. 42

6.1 Controller firmware upgrading ............................................................................ 42

6.1.1 Preparations for firmware upgrading........................................................... 42

MaintenanceAdjustment / Setting

6.1.2 Upgrading procedure .................................................................................. 42

6.2 Firmware upgrading procedure by updater ........................................................ 44

6.2.1 Updating method ........................................................................................ 44

7. Other ..................................................................................................................... 57

7.1 Disassembly/adjustment prohibited items .......................................................... 57

7.2 Disassembly/assembly/cleaning list (other parts) .............................................. 58

7.2.1 Disassembly/assembly parts list ................................................................. 58

7.2.2 Cleaning parts list....................................................................................... 59

7.3 Disassembly/assembly procedure...................................................................... 60

7.3.1 Front cover.................................................................................................. 60

7.3.2 Right front cover.......................................................................................... 60

7.3.3 Operation panel .......................................................................................... 61

7.3.4 Left cover .................................................................................................... 61

7.3.5 Rear cover .................................................................................................. 62

Troubleshooting

7.3.6 Right rear cover .......................................................................................... 62

7.3.7 Tray 2 .......................................................................................................... 63

7.3.8 MFP board/2 (MFPB/2)............................................................................... 63

7.3.9 NCU board (NCUB) .................................................................................... 64

7.3.10 MFP board/1 (MFPB/1)............................................................................... 65

Appendix

7.3.11 Print control board (PRCB) ......................................................................... 66

7.3.12 DC power supply (DCPU)........................................................................... 68

7.3.13 High voltage unit/1 (HV1)............................................................................ 71

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7.3.14 High voltage unit/2 (HV2)............................................................................ 72

7.3.15 Relay board (REYB).................................................................................... 73

7.3.16 Toner level sensor board (TLSB) ................................................................ 75

7.3.17 PH unit ........................................................................................................ 78

7.3.18 Driving unit .................................................................................................. 85

7.3.19 Scanner unit................................................................................................ 86

7.3.20 Exposure unit .............................................................................................. 87

7.3.21 Backup Battery............................................................................................ 89

7.3.22 PWB box ..................................................................................................... 90

7.3.23 PWB box lower cover .................................................................................. 94

7.3.24 Color PC drum motor (M2).......................................................................... 94

7.3.25 Transport motor (M3) .................................................................................. 95

7.3.26 Fusing motor (M4)....................................................................................... 95

7.3.27 K Developing motor (M5) ............................................................................ 95

7.3.28 Toner supply motor/Y, M (M6) ..................................................................... 96

7.3.29 Toner supply motor/C, K (M7) ..................................................................... 96

7.3.30 Scanner motor (M100) ................................................................................ 97

7.3.31 Media feed clutch assy................................................................................ 99

7.3.32 Registration roller clutch (CL3).................................................................. 100

7.3.33 1st image transfer pressure/retraction clutch (CL4).................................. 101

7.3.34 2nd image transfer pressure/retraction clutch (CL5)................................. 102

7.3.35 Switchback roller feed clutch (CL11)......................................................... 103

7.3.36 Switchback roller reverse clutch (CL12).................................................... 105

7.3.37 Duplex transport roller clutch (CL13) ........................................................ 106

7.3.38 Temperature/ humidity sensor (TEM/HUMS) ............................................ 108

7.3.39 IDC sensor board/Re, IDC sensor board/Fr (IDCSB/R, IDCSB/L)............ 109

7.3.40 Speaker (SP1)........................................................................................... 110

7.3.41 Memory (DIMM) ........................................................................................ 110

7.3.42 Hard disk................................................................................................... 111

7.4 Cleaning procedure .......................................................................................... 112

7.4.1 Tray 1 feed roller........................................................................................ 112

7.4.2 Tray 2 feed roller........................................................................................ 112

7.4.3 Vertical transport roller .............................................................................. 113

7.4.4 Laser irradiation section ............................................................................ 113

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MaintenanceAdjustment / Setting

Troubleshooting

Adjustment/Setting

8. How to use the adjustment section ..................................................................... 115

9. Description of the control panel........................................................................... 116

Appendix

iii

9.1 Control panel display........................................................................................ 116

9.1.1 Main screen .............................................................................................. 116

9.1.2 Print screen............................................................................................... 116

bizhub C20

9.1.3 Toner supply screen.................................................................................. 117

10. REPORT/STATUS mode..................................................................................... 118

10.1 REPORT/STATUS mode function tree ............................................................. 118

10.2 TOTAL PRINT................................................................................................... 119

10.2.1 TOTAL PRINT ........................................................................................... 119

10.2.2 MONO COPY ........................................................................................... 119

Outline

10.2.3 COLOR COPY.......................................................................................... 119

10.2.4 MONO PRINT........................................................................................... 119

10.2.5 COLOR PRINT ......................................................................................... 119

10.2.6 FAX PRINT ............................................................................................... 119

10.2.7 TOTAL SCAN............................................................................................ 119

10.3 SUPPLY STATUS ............................................................................................. 120

10.3.1 C TONER.................................................................................................. 120

MaintenanceAdjustment / Setting

10.3.2 M TONER ................................................................................................. 120

10.3.3 Y TONER.................................................................................................. 120

10.3.4 K TONER.................................................................................................. 120

10.3.5 C I-UNIT.................................................................................................... 120

10.3.6 M I-UNIT ................................................................................................... 120

10.3.7 Y I-UNIT.................................................................................................... 120

10.3.8 K I-UNIT.................................................................................................... 120

10.4 TX/RX RESULT ................................................................................................ 121

10.5 REPORT........................................................................................................... 121

10.5.1 TX RESULT REPORT............................................................................... 121

10.5.2 RX RESULT REPORT .............................................................................. 121

10.5.3 ACTIVITY REPORT.................................................................................. 121

10.5.4 MEMORY DATA LIST................................................................................ 121

Troubleshooting

10.5.5 MEMORY IMAGE PRINT ......................................................................... 121

10.5.6 FAVORITE LIST........................................................................................ 121

10.5.7 SPEED DIAL LIST .................................................................................... 122

10.5.8 GROUP DIAL LIST ................................................................................... 122

10.5.9 UTILITY MAP............................................................................................ 122

10.5.10 PS/PCL MENU MAP................................................................................. 122

Appendix

10.5.11 CONFIGURATION PAGE.......................................................................... 122

10.5.12 PS FONT LIST.......................................................................................... 126

10.5.13 PCL FONT LIST ....................................................................................... 126

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10.5.14 DIRECTORY LIST..................................................................................... 126

11. UTILITY mode..................................................................................................... 127

11.1 UTILITY mode function tree.............................................................................. 127

11.2 MACHINE SETTING......................................................................................... 131

11.2.1 AUTO PANEL RESET ............................................................................... 131

11.2.2 PREHEAT MODE...................................................................................... 131

11.2.3 ENERGY SAVE MODE............................................................................. 131

11.2.4 LCD CONTRAST ...................................................................................... 131

11.2.5 KEY SPEED.............................................................................................. 131

11.2.6 LANGUAGE .............................................................................................. 132

11.2.7 LAMP OFF TIME ...................................................................................... 132

11.2.8 LAMP WARMUP TIME ............................................................................. 132

11.2.9 BUZZER VOLUME.................................................................................... 132

11.2.10 INITIAL MODE .......................................................................................... 133

11.2.11 TONER EMPTY ........................................................................................133

11.2.12 TONER NEAR EMPTY .............................................................................133

11.2.13 I-UNIT NEAR EMPTY ............................................................................... 133

11.2.14 AUTO CONTINUE..................................................................................... 133

11.2.15 CALIBRATION .......................................................................................... 134

11.3 PAPER SETUP................................................................................................. 135

11.3.1 TRAY1 PAPER .......................................................................................... 135

11.3.2 TRAY2 PAPER .......................................................................................... 135

11.4 ADMIN. MANAGEMENT .................................................................................. 136

11.4.1 ADMINISTRATOR NO............................................................................... 136

11.4.2 REMOTE MONITOR................................................................................. 136

11.4.3 NETWORK SETTING ............................................................................... 136

11.4.4 E-MAIL SETTING ..................................................................................... 142

11.4.5 LDAP SETTING ........................................................................................ 145

11.4.6 CAMERA DIRECT .................................................................................... 147

11.4.7 USB SETTING .......................................................................................... 148

11.4.8 COMM. SETTING ..................................................................................... 148

11.4.9 USER SETTING ....................................................................................... 149

11.4.10 AUTO REDIAL .......................................................................................... 150

11.4.11 SUPPLIES REPLACE............................................................................... 150

11.5 COPY SETTING............................................................................................... 151

11.5.1 PAPER PRIORITY .................................................................................... 151

11.5.2 QUALITY PRIORITY................................................................................. 151

11.5.3 DENSITY PRIORITY ................................................................................ 151

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Troubleshooting

Appendix

v

11.5.4 DENSITY LEVEL ...................................................................................... 151

11.5.5 OUTPUT PRIORITY ................................................................................. 152

11.5.6 4IN1 COPY ORDER ................................................................................. 152

bizhub C20

11.5.7 DUPLEX COPY ........................................................................................ 152

11.6 DIAL REGISTER .............................................................................................. 153

11.6.1 FAVORITE ................................................................................................ 153

11.6.2 SPEED DIAL............................................................................................. 153

11.6.3 GROUP DIAL............................................................................................ 153

11.7 FAX TX OPERATION ....................................................................................... 153

Outline

11.7.1 DENSITY LEVEL ...................................................................................... 153

11.7.2 QUALITY PRIORITY................................................................................. 154

11.7.3 DEFULT TX............................................................................................... 154

11.7.4 HEADER................................................................................................... 154

11.8 FAX RX OPERATION ....................................................................................... 155

11.8.1 MEMORY RX MODE................................................................................ 155

11.8.2 NO. of RINGS ........................................................................................... 155

MaintenanceAdjustment / Setting

11.8.3 REDUCTION RX ...................................................................................... 155

11.8.4 RX PRINT ................................................................................................. 160

11.8.5 RX MODE ................................................................................................. 160

11.8.6 FORWARD ............................................................................................... 161

11.8.7 FOOTER................................................................................................... 161

11.8.8 SELECT TRAY.......................................................................................... 162

11.9 REPORTING .................................................................................................... 162

11.9.1 ACTIVITY REPORT.................................................................................. 162

11.9.2 TX RESULT REPORT............................................................................... 162

11.9.3 RX RESULT REPORT .............................................................................. 162

11.10 SCAN SETTING ............................................................................................... 163

11.10.1 RESOLUTION .......................................................................................... 163

11.10.2 IMAGE FORMAT....................................................................................... 163

Troubleshooting

11.10.3 CODING METHOD ................................................................................... 163

11.10.4 FILE SIZE ................................................................................................. 163

11.10.5 QUALITY PRIORITY................................................................................. 163

11.10.6 DENSITY LEVEL ...................................................................................... 164

11.11 DIRECT PRINT ................................................................................................ 164

11.11.1 IMAGE QUALITY...................................................................................... 164

Appendix

11.11.2 PAPER SIZE ............................................................................................. 164

11.11.3 N-UP LAYOUT .......................................................................................... 164

12. PS/PCL PRINT mode ......................................................................................... 165

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12.1 PS/PCL PRINT mode function tree .................................................................. 165

12.2 PROOF/PRINT MENU...................................................................................... 167

12.3 PAPER MENU .................................................................................................. 167

12.3.1 ANY TRAY SETTING................................................................................ 167

12.3.2 TRAY CHAINING ...................................................................................... 168

12.3.3 TRAY MAPPING ....................................................................................... 168

12.3.4 DUPLEX.................................................................................................... 169

12.3.5 COPIES .................................................................................................... 169

12.3.6 COLLATE .................................................................................................. 169

12.4 QUALITY MENU............................................................................................... 170

12.4.1 COLOR MODE ......................................................................................... 170

12.4.2 BRIGHTNESS........................................................................................... 170

12.4.3 HALFTONE............................................................................................... 170

12.4.4 EDGE ENHANCEMENT ........................................................................... 171

12.4.5 EDGE STRENGTH ................................................................................... 171

12.4.6 ECONOMY PRINT.................................................................................... 172

12.4.7 PCL SETTING .......................................................................................... 172

12.4.8 PS SETTING............................................................................................. 174

12.4.9 CALIBRATION .......................................................................................... 178

12.5 SYS DEFAULT MENU ...................................................................................... 179

12.5.1 EMULATION ............................................................................................. 179

12.5.2 PAPER ...................................................................................................... 181

12.5.3 GRAYSCALE PAGE.................................................................................. 182

12.5.4 STARTUP OPTIONS................................................................................. 182

12.5.5 HOLD JOB TIMEOUT............................................................................... 183

12.5.6 HDD FORMAT .......................................................................................... 183

12.5.7 CARD FORMAT ........................................................................................ 183

13. User service mode .............................................................................................. 184

13.1 User service mode function tree ....................................................................... 184

13.2 FAX MAINTENANCE ........................................................................................ 187

13.3 ADJUST............................................................................................................ 187

13.3.1 TOP ADJUSTMENT.................................................................................. 187

13.3.2 LEFT ADJ. (FRONT)................................................................................. 187

13.3.3 LEFT ADJ. (BACK) ................................................................................... 187

13.3.4 TRANSFER POWER ................................................................................ 187

13.4 AIDC MODE ..................................................................................................... 187

13.5 CRU USAGE..................................................................................................... 187

13.5.1 TRANSFER BELT ..................................................................................... 187

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MaintenanceAdjustment / Setting

Troubleshooting

Appendix

vii

13.5.2 FUSER UNIT ............................................................................................ 187

13.5.3 TRANSFER ROLLER ............................................................................... 187

13.6 SUPPLIES REPLACE ...................................................................................... 187

bizhub C20

13.7 MAINTENANCE MENU.................................................................................... 188

13.7.1 PRINT MENU ........................................................................................... 188

13.7.2 IMG ADJ THICK ....................................................................................... 189

13.7.3 IMG ADJ BLACK....................................................................................... 189

14. SERVICE MODE................................................................................................. 190

14.1 SERVICE MODE entry procedure.................................................................... 190

Outline

14.2 SERVICE MODE function tree ......................................................................... 190

14.3 SERVICE’S CHOICE........................................................................................ 195

14.3.1 TX SPEED ................................................................................................ 195

14.3.2 RX SPEED................................................................................................ 195

14.3.3 TX LEVEL ................................................................................................. 195

14.3.4 RX LEVEL................................................................................................. 195

14.3.5 DTMF LEVEL............................................................................................ 195

MaintenanceAdjustment / Setting

14.3.6 CNG LEVEL.............................................................................................. 196

14.3.7 CED LEVEL .............................................................................................. 196

14.3.8 ECM MODE .............................................................................................. 196

14.3.9 CODING SCHEME ................................................................................... 196

14.3.10 TONER EMPTY REPORT ........................................................................ 197

14.3.11 PROTOCOL REPORT .............................................................................. 197

14.3.12 TWAIN TIMEOUT ..................................................................................... 197

14.3.13 ENERGY SAVE MODE ............................................................................ 198

14.3.14 ENABLE WARNING ................................................................................. 198

14.4 ADJUST ........................................................................................................... 198

14.4.1 CCD MAIN ZOOM .................................................................................... 199

14.4.2 CCD SUB ZOOM...................................................................................... 200

14.4.3 CCD MAIN REGIST.................................................................................. 201

Troubleshooting

14.4.4 CCD SUB REGIST ................................................................................... 202

14.4.5 ADF 1ST SUB ZOOM............................................................................... 203

14.4.6 ADF 1ST MAIN REG ................................................................................ 203

14.4.7 ADF 1ST SUB REG.................................................................................. 204

14.4.8 ADF 2ND SUB ZOOM .............................................................................. 204

14.4.9 ADF 2ND MAIN REG................................................................................ 204

Appendix

14.4.10 ADF 2ND SUB REG ................................................................................. 205

14.4.11 ADF LOOP................................................................................................ 205

14.4.12 FLICKER................................................................................................... 205

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14.4.13 TOP ADJUSTMENT.................................................................................. 206

14.4.14 LEFT ADJ. (FRONT)................................................................................. 206

14.4.15 LEFT ADJ. (BACK) ................................................................................... 206

14.4.16 TRANSFER POWER ................................................................................207

14.4.17 IMG ADJ THICK........................................................................................ 208

14.4.18 IMG ADJ BLACK....................................................................................... 208

14.4.19 IMAGE ADJ PARAM ................................................................................. 208

14.4.20 MAXIMUM DENSITY ................................................................................209

14.4.21 FUSER SPEED......................................................................................... 209

14.4.22 TEMPERATURE ....................................................................................... 210

14.4.23 AIDC MODE.............................................................................................. 210

14.4.24 SUPPLIES REPLACE............................................................................... 210

14.4.25 BK CLEAR ................................................................................................ 211

14.5 COUNTER........................................................................................................ 211

14.5.1 TOTAL PRINT ........................................................................................... 211

14.5.2 FAX COUNTER......................................................................................... 212

14.5.3 SCAN COUNTER ..................................................................................... 212

14.5.4 TRAY COUNTER ...................................................................................... 212

14.5.5 PAPER SIZE COUNTER .......................................................................... 212

14.5.6 PAPER TYPE COUNTER ......................................................................... 213

14.5.7 APPLICATION COUNT. ............................................................................ 213

14.5.8 SUPPLIES STATUS .................................................................................. 213

14.5.9 CRU USAGE............................................................................................. 213

14.5.10 JAM COUNTER ........................................................................................214

14.5.11 TROUBLE COUNTER .............................................................................. 214

14.6 DISPLAY........................................................................................................... 214

14.6.1 MAIN F/W VER. ........................................................................................ 214

14.6.2 ENGINE F/W VER. ................................................................................... 214

14.6.3 MAIN RAM SIZE ....................................................................................... 214

14.6.4 SERIAL NO............................................................................................... 214

14.6.5 PP F/W VER. ............................................................................................ 214

14.6.6 PP BOOT VER.......................................................................................... 214

14.6.7 PRINTER RAM SIZE ................................................................................ 215

14.6.8 HARD DISK .............................................................................................. 215

14.6.9 CARD........................................................................................................ 215

14.7 FUNCTION ....................................................................................................... 216

14.7.1 PAPER FEED TEST ................................................................................. 216

14.7.2 PRN TEST PATTERN ............................................................................... 216

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MaintenanceAdjustment / Setting

Troubleshooting

Appendix

ix

14.7.3 ADF FEED TEST...................................................................................... 217

14.7.4 COPY ADF GLASS .................................................................................. 217

14.7.5 FAX RES. COPY TEST ............................................................................ 217

bizhub C20

14.7.6 SCAN TEST.............................................................................................. 217

14.7.7 PRINTER TEST........................................................................................ 218

14.7.8 ADF TEST ................................................................................................ 220

14.8 SOFT SWITCH................................................................................................. 221

14.8.1 KEY DEFINITION FOR SOFT SWITCH................................................... 221

14.9 REPORT........................................................................................................... 221

Outline

14.9.1 SERVICE DATA LIST ................................................................................ 221

14.9.2 ERROR CODE LIST................................................................................. 224

14.9.3 T.30 PROTOCOL LIST.............................................................................. 225

14.10 ADMIN. REGISTRATION ................................................................................. 227

14.11 FIXED ZOOM CHANGE................................................................................... 227

14.12 FACTORY TEST............................................................................................... 227

14.13 CLEAR DATA.................................................................................................... 228

MaintenanceAdjustment / Setting

14.13.1 SRAM CLEAR .......................................................................................... 228

14.13.2 MEMORY CLEAR..................................................................................... 228

14.14 PS/PCL............................................................................................................. 229

14.14.1 PRINT MENU ........................................................................................... 229

14.14.2 SOFT SWITCH ......................................................................................... 236

15. SOFT SWITCH set ............................................................................................. 237

15.1 Description ....................................................................................................... 237

15.2 Default setting................................................................................................... 237

15.2.1 Country for each marketing area .............................................................. 237

15.2.2 Soft switch list ........................................................................................... 238

15.2.3 Default soft switch setting for each market area....................................... 242

15.3 Soft switch definition......................................................................................... 264

15.3.1 SOFT SWITCH: #01 ................................................................................. 264

15.3.2 SOFT SWITCH: #02 ................................................................................. 265

Troubleshooting

15.3.3 SOFT SWITCH: #03 ................................................................................. 266

15.3.4 SOFT SWITCH: #04 ................................................................................. 267

15.3.5 SOFT SWITCH: #05 ................................................................................. 268

15.3.6 SOFT SWITCH: #06 ................................................................................. 269

15.3.7 SOFT SWITCH: #07 ................................................................................. 269

Appendix

15.3.8 SOFT SWITCH: #08 ................................................................................. 270

15.3.9 SOFT SWITCH: #09 ................................................................................. 270

15.3.10 SOFT SWITCH: #10 ................................................................................. 271

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15.3.11 SOFT SWITCH: #11 ................................................................................. 272

15.3.12 SOFT SWITCH: #12 ................................................................................. 273

15.3.13 SOFT SWITCH: #13 ................................................................................. 274

15.3.14 SOFT SWITCH: #14 ................................................................................. 274

15.3.15 SOFT SWITCH: #15 ................................................................................. 275

15.3.16 SOFT SWITCH: #16 ................................................................................. 275

15.3.17 SOFT SWITCH: #17 ................................................................................. 276

15.3.18 SOFT SWITCH: #18 ................................................................................. 277

15.3.19 SOFT SWITCH: #19 ................................................................................. 278

15.3.20 SOFT SWITCH: #20 ................................................................................. 278

15.3.21 SOFT SWITCH: #21 ................................................................................. 279

15.3.22 SOFT SWITCH: #22 ................................................................................. 280

15.3.23 SOFT SWITCH: #23 ................................................................................. 280

15.3.24 SOFT SWITCH: #24 (Part 1) .................................................................... 281

15.3.25 SOFT SWITCH: #24 (Part 2) .................................................................... 282

15.3.26 SOFT SWITCH: #24 (Part 3) .................................................................... 283

15.3.27 SOFT SWITCH: #25 ................................................................................. 283

15.3.28 SOFT SWITCH: #26 ................................................................................. 284

15.3.29 SOFT SWITCH: #27 ................................................................................. 284

15.3.30 SOFT SWITCH: #28 ................................................................................. 285

15.3.31 SOFT SWITCH: #29 ................................................................................. 286

15.3.32 SOFT SWITCH: #30 ................................................................................. 287

15.3.33 SOFT SWITCH: #31 ................................................................................. 288

15.3.34 SOFT SWITCH: #32 ................................................................................. 288

15.3.35 SOFT SWITCH: #33 ................................................................................. 289

15.3.36 SOFT SWITCH: #34 ................................................................................. 289

15.3.37 SOFT SWITCH: #35 ................................................................................. 290

15.3.38 SOFT SWITCH: #36 ................................................................................. 291

15.3.39 SOFT SWITCH: #37 ................................................................................. 292

15.3.40 SOFT SWITCH: #38 ................................................................................. 292

15.3.41 SOFT SWITCH: #39 ................................................................................. 293

15.3.42 SOFT SWITCH: #40 ................................................................................. 294

15.3.43 SOFT SWITCH: #41 ................................................................................. 295

15.3.44 SOFT SWITCH: #42 ................................................................................. 296

15.3.45 SOFT SWITCH: #43 ................................................................................. 296

15.3.46 SOFT SWITCH: #44 ................................................................................. 296

15.3.47 SOFT SWITCH: #45 ................................................................................. 297

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MaintenanceAdjustment / Setting

Troubleshooting

Appendix

xi

15.3.48 SOFT SWITCH: #46 ................................................................................. 297

15.3.49 SOFT SWITCH: #47 ................................................................................. 298

15.3.50 SOFT SWITCH: #48 ................................................................................. 298

bizhub C20

Outline

MaintenanceAdjustment / Setting

15.3.51 SOFT SWITCH: #49 ................................................................................. 299

15.3.52 SOFT SWITCH: #50 ................................................................................. 299

15.3.53 SOFT SWITCH: #51 ................................................................................. 300

15.3.54 SOFT SWITCH: #52 ................................................................................. 300

15.3.55 SOFT SWITCH: #53 ................................................................................. 301

15.3.56 SOFT SWITCH: #54 ................................................................................. 301

15.3.57 SOFT SWITCH: #55 ................................................................................. 302

15.3.58 SOFT SWITCH: #56 ................................................................................. 302

15.3.59 SOFT SWITCH: #57 ................................................................................. 302

15.3.60 SOFT SWITCH: #58 ................................................................................. 303

15.3.61 SOFT SWITCH: #59 (Part 1) .................................................................... 304

15.3.62 SOFT SWITCH: #59 (Part 2) .................................................................... 305

15.3.63 SOFT SWITCH: #59 (Part 3) .................................................................... 306

15.3.64 SOFT SWITCH: #60 ................................................................................. 307

15.3.65 SOFT SWITCH: #61 ................................................................................. 307

15.3.66 SOFT SWITCH: #62 ................................................................................. 308

15.3.67 SOFT SWITCH: #63 ................................................................................. 308

15.3.68 SOFT SWITCH: #64 ................................................................................. 309

16. Fax Protocols ...................................................................................................... 310

16.1 G3 ECM (G3 Error Correction Mode)............................................................... 310

16.2 Line control....................................................................................................... 311

16.2.1 Procedure of G3 mode communication .................................................... 311

16.3 Table of reference code.................................................................................... 312

16.4 How to analyze the T30 protocol monitor ......................................................... 313

Field Service Ver. 1.0 Sep. 2008

Troubleshooting

Troubleshooting

Appendix

17. Jam display ......................................................................................................... 321

17.1 Misfeed display................................................................................................. 321

17.2 Sensor layout.................................................................................................... 322

17.3 Solution ............................................................................................................ 323

xii

17.1.1 Misfeed display resetting procedure ......................................................... 321

17.3.1 Initial check items ..................................................................................... 323

17.3.2 Misfeed at tray 2 paper feed section ......................................................... 323

17.3.3 Misfeed at fusing section .......................................................................... 324

17.3.4 Misfeed at transfer section........................................................................ 325

Field Service Ver. 1.0 Sep. 2008

17.3.5 Misfeed at duplex paper feed section........................................................ 326

17.3.6 Misfeed at duplex paper transport section ................................................ 327

17.3.7 Misfeed at tray1 paper feed section .......................................................... 328

17.3.8 Misfeed at horizontal transport section ..................................................... 328

17.3.9 Misfeed at exit section............................................................................... 329

17.3.10 Misfeed at switch back section.................................................................. 329

18. Malfunction code ................................................................................................. 330

18.1 Trouble codes (service call) ..............................................................................330

18.1.1 Trouble code list ........................................................................................ 330

18.2 Resetting a malfunction .................................................................................... 334

18.3 Solution............................................................................................................. 335

18.3.1 0010: Color PC drum motor malfunction................................................... 335

18.3.2 0017: Transport motor malfunction ........................................................... 335

18.3.3 0018: K developing motor malfunction...................................................... 336

18.3.4 001B: Color developing motor malfunction ............................................... 336

18.3.5 0045: Defogger fan motor malfunction...................................................... 337

18.3.6 0046: Fusing fan motor malfunction.......................................................... 337

18.3.7 004A: Duplex cooling fan motor malfunction............................................. 337

18.3.8 004C: Ozone ventilation fan motor malfunction ........................................ 338

18.3.9 004E: DC power supply fan motor malfunction......................................... 338

18.3.10 0060: Fusing motor malfunction................................................................ 339

18.3.11 0094: 2nd image transfer pressure/retraction failure................................. 339

18.3.12 0096: 1st image transfer pressure/retraction failure.................................. 340

18.3.13 0300: Polygon motor malfunction.............................................................. 340

18.3.14 0310: Laser malfunction............................................................................ 341

18.3.15 0500: Heating roller warm-up failure ......................................................... 341

18.3.16 0502: Thermistor open-circuit failure ........................................................ 341

18.3.17 0503: Thermistor resistance failure........................................................... 341

18.3.18 0510: Abnormally low heating roller temperature ..................................... 341

18.3.19 0520: Abnormally high heating roller temperature ....................................341

18.3.20 0F50: OHP sensor malfunction ................................................................. 341

18.3.21 0F52: Toner level sensor /Y malfunction ................................................... 342

18.3.22 0F53: Toner level sensor /M malfunction .................................................. 342

18.3.23 0F54: Toner level sensor /C malfunction................................................... 342

8.3.24 0F55: Toner level sensor /K malfunction ................................................... 342

1

18.3.25 13C0: Print control board malfunction....................................................... 342

18.3.26 13DD: Backup data error .......................................................................... 342

18.3.27 13F0: Engine control failure ......................................................................343

bizhub C20Outline

MaintenanceAdjustment / Setting

Troubleshooting

Appendix

xiii

18.3.28 13E2: Engine flash ROM write error ......................................................... 343

18.3.29 13E3: Engine flash ROM device fault ....................................................... 343

18.3.30 SCANNER MOTION ERROR CHECK SCANNER LOCK ........................ 343

bizhub C20

18.3.31 14A3: IR lamp malfunction........................................................................ 344

18.3.32 1038: Engine connect error ...................................................................... 344

18.3.33 3FFF: Flash ROM write error .................................................................... 345

18.3.34 4FFF: Controller connect error ................................................................. 345

18.3.35 C002: RAM error at startup (standard memory)

Outline

18.3.36 C013: MAC address error at startup

18.3.37 C025: Controller ROM error (Configuration information error)

18.3.38 C050: HDD access error........................................................................... 347

18.3.39 C051: HDD full error ................................................................................. 348

MaintenanceAdjustment / Setting

18.3.40 C052: Compact flash access error ........................................................... 348

18.3.41 C053: Compact flash full error .................................................................. 349

18.3.42 C060: Firmware update error.................................................................... 349

18.3.43 FFFF: Interface communication error ....................................................... 350

19. Power supply troubles......................................................................................... 351

19.1 Machine is not energized at all (DCPU operation check) ................................. 351

19.2 Control panel indicators do not light ................................................................. 351

19.3 Fusing heaters do not operate ......................................................................... 352

20. Image quality problems....................................................................................... 353

20.1 Printer system .................................................................................................. 353

20.1.1 White lines/bands, colored lines/bands in sub scan direction................... 353

20.1.2 White lines/bands, colored lines/bands in main scan direction................. 354

20.1.3 Uneven density in sub scan direction ....................................................... 355

20.1.4 Uneven density in main scan direction ..................................................... 356

Troubleshooting

20.1.5 Low image density .................................................................................... 357

20.1.6 Gradation reproduction failure .................................................................. 358

20.1.7 Foggy background .................................................................................... 359

20.1.8 Poor color reproduction............................................................................. 360

20.1.9 Void areas, white spots ............................................................................. 361

Appendix

20.1.10 Colored spots............................................................................................ 362

20.1.11 Blurred image ........................................................................................... 363

20.1.12 Blank copy, black copy.............................................................................. 364

Field Service Ver. 1.0 Sep. 2008

C003: RAM error at startup (expanded memory) ..................................... 346

C015: BOOT ROM error at startup

C022: NVRAM error at startup ................................................................. 346

C026: Controller ROM error (Access error)

C027: Controller ROM error (Data error) .................................................. 347

xiv

Field Service Ver. 1.0 Sep. 2008

20.1.13 Incorrect color image registration.............................................................. 365

20.1.14 Poor fusing performance, offset ................................................................ 366

20.1.15 Brush effect ............................................................................................... 367

20.1.16 Back marking ............................................................................................ 368

20.1.17 Uneven pitch ............................................................................................. 369

21. FAX error ............................................................................................................. 370

21.1 Communication error ........................................................................................ 370

21.2 Outline .............................................................................................................. 370

21.3 Error occurring during transmission.................................................................. 371

21.3.1 Error occurring during reception ............................................................... 371

21.4 Error code ......................................................................................................... 372

21.4.1 Reception.................................................................................................. 372

21.4.2 Transmission ............................................................................................. 374

22. Scan error ........................................................................................................... 377

Appendix

23. Parts layout drawing ............................................................................................ 379

23.1 Main body ......................................................................................................... 379

23.2 Auto Document Feeder Unit ............................................................................. 382

23.3 Lower feeder unit (option)................................................................................. 383

24. Connector layout drawing.................................................................................... 384

bizhub C20Outline

MaintenanceAdjustment / Setting

xv

Troubleshooting

Appendix

bizhub C20

Outline

MaintenanceAdjustment / Setting

Field Service Ver. 1.0 Sep. 2008

Blank Page

Troubleshooting

Appendix

xvi

Field Service Ver. 1.0 Sep. 2008 1. System configuration

Outline

1. System configuration

Machine front view

[1]

[2]

A0FDF1C500DA

[1] bizhub C20 [2] Lower feeder unit

bizhub C20Outline

1

2. Product specifications Field Service Ver. 1.0 Sep. 2008

2. Product specifications

A. Type

Type Desktop tandem full-color A4 laser beam printer

bizhub C20

Outline

Printing system Semiconductor laser and electrostatic image transfer to plain paper

Exposure system 4 laser diode and 1 polygon mirror

PC drum type OPC (organic photo conductor)

Photoconductor
cleaning

Scan resolution 600 x 600 dpi, 600 x 300 dpi

Print resolution 600 x 600 dpi x 4bit

Copy resolution 600 x 600 dpi, 1200 x 600 dpi

Platen Stationary

Registration Rear left edge

Paper feeding system

Developing system Single-element developing system

Charging system Needle charging system (with Ozone suction feature)

Image transfer
system

Paper separating
system

Fusing system Belt fusing

Paper exit system Face down (Output tray capacity: 250 sheets)

Blade cleaning system

Tray1: 100 sheets
Tray2: 250 sheets
Tray3: 500 sheets (Option)

Intermediate transfer belt system

Curvature separation + charge-neutralizing system

B. Functions

Cold start: 58 seconds

Warm-up time

Process speed

First-page-out-time 18.0 second (Full-color mode, A4S/LetterS, 1-sided mode, plain paper)

Print speed

Sleep-mode to ready: 40 seconds
(Power on to ready, at ambient temperature of 23 °C/73.4 °F and rated source
voltage)

144 mm/sec (plain paper, Monochrome/full color mode)
72 mm/sec (thick paper/OHP, Monochrome/full color mode)

24 pages/min. (A4S, 1-sided print, plain paper)
25 pages/min. (LetterS, 1-sided print, plain paper)
12 pages/min. (A4S, 1-sided print, thick paper)

12.5 pages/min. (LetterS, 1-sided print, thick paper)

2

Field Service Ver. 1.0 Sep. 2008 2. Product specifications

C. Media

Paper source (maximum tray capacity)

Tray 1 Tray 2

100 sheets 250 sheets

20 sheets

92 to 216 mm

(3.6 to 8.5 inch)

148 to 356 mm

(5.8 to 14.0 inch)

92 to 216 mm

(3.6 to 8.5 inch)

148 to 297 mm

(5.8 to 11.7 inch)

⎯

Media type

Media
dimensions

Ty pe

Plain paper
(60 to 90 g/m

Thick 1 (91 to 150 g/m

Thick 2 (151 to 210 g/m

2

; 16 to 24 lb)

2

)

2

)

OHP

Label

Letterhead

Transparencies

Glossy 1 (100 to 128 g/m

Glossy 2 (129 to 158 g/m

2

)

2

)

Postcard

Envelope 10 sheets

Width

Length

D. Maintenance

Machine durability 400,000 prints or 5 years, whichever comes first

E. Machine specifications

Power requirements

Max power consumption

Dimensions

Weight

Operating noise

Voltage: AC 100V, 120 V, 220 to 240 V

Frequency: 50 to 60 Hz ± 3 Hz

1,250 W or less
25 W less (Energy saver mode)

539 (W) x 590 (D) x 578 (H) mm

21.23 (W) x 23.23 (D) x 22.75 (H) inch

50.0 kg (110.3 lb) or less without consumables

55.0 kg (121.3 lb) or less with consumables

During standby : 39 dB (A) or less
During printing : 53.5 dB (A) or less
During copying : 54.5 dB (A) or less (with ADF)

bizhub C20Outline

F. Operating environment

Temperature 10 °C to 35 °C / 50 °F to 95 °F (with a fluctuation of 10 °C / 18 °F or less per hour)

Humidity 15% to 85% (with a fluctuation of 20% or less per hour)

3

2. Product specifications Field Service Ver. 1.0 Sep. 2008

G. Print functions

Type Built-in type controller

Pentium II: 400 MHz or higher

bizhub C20

Outline

Personal computer

Operating system Microsoft Windows Vista Home Basic/Home Premium/Ultimate/Business/

Standard memory Printer: 256 MB, Copier: 256MB

I/O Interfaces 10Base-T/100Base-TX/1000Base-T Ethernet interface port

PowerPC G3 or later (G4 or later is recommended)

Macintosh equipped with an Intel processor

Enterprise, Windows Vista Home Basic /Home Premium /Ultimate/Business /
Enterprise x64 Edition, Windows XP Home Edition/Professional (Service Pack
2 or later), Windows XP Professional x64 Edition, Windows Server 2003, Win­dows Server 2003 x64 Edition, Windows 2000 (Service Pack 4 or later)

Mac OS X (10.2.8 or later; We recommend installing the newest patch)

Red Hat Linux 9.0, SuSE Linux 8.2

USB (PictBride1.0, USB Device Printing) RJ-45 connector

NOTE

• These specifications are subject to change without notice.

2.1 Fax specifications

Standard (203 dpi x 98 dpi)

Resolution

Halftone level

Automatic reduction

Compatibility ECM/Super G3

Modem speed V.34 (up to 33.6 Kbps)

Transmit speed 3 second/page (at V.34)

Compression MH/MR/MMR/JBIG

Memory for receiving 6 MB for Fax-RX (approx. 250 pages), (included in 32 MB NAND flash)

Remote setting Available via Tel line and USB

Paper size A4S, LegalS, LetterS

Paper type Plain paper, recycled paper

Functions

Fine (203 dpi x 196 dpi)

Super fine (203 dpi x 392 dpi)

Standard/Fine/Super fine
Halftone standard/Halftone fine/Halftone super fine

Receive Supported

Transmit Supported

Speed dial 220

Group dial 20 groups (50 destination stations for one group)

Broadcast

Other supported
functions

Available maximum 255 stations.
(Speed dial 220 stations, full dial 16 stations)

Timer transmission, address book, real time clock, auto
redial, reduce/split, smoothing

4

Field Service Ver. 1.0 Sep. 2008 3. Periodical check

Maintenance

3. Periodical check

3.1 Maintenance items

3.1.1 Parts to be replaced by users (CRU)

No Class Part to be replaced Number of prints Clean Replace Description

1

2

Processing

section

3 Imaging unit (C, M, Y, K)

4 Ozone filter *4 120,000

Tray 2

5

media feed

section

Tray 1

6

media feed

section

7

Image

8 Transfer roller *4

transfer
section

9 Waste toner bottle

Fusing

10

section

Standard in-box toner car­tridge (C, M, Y, K)

High-capacity toner
cartridge (C, M, Y, K)

Feed roller

Feed roller

Transfer belt unit

Fuser unit

*1 : 2 pages/job
*2 : When printed in black only
*3 : When printed in color only
*4 : The transfer roller and ozone filter are available as a kit and must be replaced at the

same time

8,000 (Continuous

printing)

8,000 (Continuous

printing)

30,000 (Continuous

printing)

When malfunction

occurs

When malfunction

occurs

120,000 (Continuous

printing, 2P/J *1)

120,000 (Continuous

printing, 2P/J *1)

36,000 (K *2)

9,000 (Y,M,C,K *3)

120,000 (Continuous

printing)

100,000 (2P/J *1)

bizhub C20

Maintenance

5

3. Periodical check Field Service Ver. 1.0 Sep. 2008

3.1.2 Parts to be replaced by a service engineer (FRU)

No Class Part to be replaced Number of prints Clean Replace Description

Tray 2

1

bizhub C20

media feed

2

media feed

3

feeder unit

section

Tray 1

section

Lower

Feed roller 300,000

Feed roller 300,000

Feed roller 300,000

3.2 Maintenance parts

• To ensure that the machine produces good prints and to extend its service life, it is rec­ommended that the maintenance jobs described in this schedule be carried out as
instructed.

• The replacing time is to be determined by the total counter value.

• Maintenance conditions are based on A4S or letterS,1-side print.

3.2.1 Replacement parts

A. Main body

Maintenance

No Class Maintenance parts

1 Tray 2 Feed roller 1 300,000 4138 3032 ## P. 8

2 Tray 1 Feed roller 1 300,000 4138 3032 ## P. 9

Quan

tity

Actual

durable cycle

Parts No.

Descrip-

tion

Ref.page

B. Option

No Class Maintenance parts

Lower

1

feeder unit

Feed roller 1 300,000 4128 3214 ## *1

Quan

tity

Actual

durable cycle

*1: For details, see the optional lower feeder unit service manual.

6

Parts No.

Descrip-

tions

Ref.page

Field Service Ver. 1.0 Sep. 2008 3. Periodical check

3.3 Concept of parts life

Waste toner

bottle

Fuser unit

Ozone filter ⎯ 120,000 prints

Transfer roller • Based on the number of pages printed, the life is detected. 120,000 prints

Transfer belt

Imaging unit

• Detected by the waste toner full sensor.

• A waste toner full condition is detected when about 1,500
color printed pages are produced after a waste toner near
full condition has been detected.

• Based on the fusing motor rotation data, the fuser unit driv­ing time is counted.
Comparing the fuser unit driving time count value with the
number of pages printed, the machine detects the one that
reaches its life value earlier.

• Base on the intermediate transport motor rotation data, the
transfer belt driving time is counted and the life is detected.

• Base on the color PC drum motor or intermediate transport
motor rotation data, the imaging unit driving time is
counted.
Comparing the imaging unit driving time count value and
the number of pages printed, the machine detects the one
that reaches its life value earlier.

Description Life value

Monochrome:

36,000 prints

Color: 9,000 prints

120,000 prints

(Continuous printing)

100,000 prints (2P/J)

120,000 prints

30,000 prints

(Continuous printing)

20,000 prints (2P/J)

A. Conditions for life specifications values

• The life specification values represent the number of pages printed or figures equivalent
to it when the given conditions (see the table given below) are met. They may be more or
less, depending on the machine operating conditions of each individual user.

Item Description

Job type 2 consecutive pages (2 pages/job)

Media size A4S or LetterS

Color ratio Black to Color = 6 : 4

Original density C/W ratio = 5% each color

bizhub C20

Maintenance

7

3. Periodical check Field Service Ver. 1.0 Sep. 2008

3.4 Maintenance Procedure (periodical check parts)

3.4.1 Replacing the tray 2 feed roller A. Periodically replaced parts/cycle

• Tray 2 feed roller: Every 300,000 prints

bizhub C20

B. Procedure

1. Slide out the tray 2.

[2]

[2][3]

2. Lock the media lift plate [1].

3. Remove two C-rings [2], and remove

the bearing [3] at the front.

Maintenance

[1]

[1]

[2]

A0FDF2C001DA

4. Remove the C-ring [1], and remove
the feed roller [2].

A0FDF2C002DA

NOTE

• When reinstalling the feed roller [1],

make sure that it is mounted in the
direction shown in the illustration
on the left.

[1]

A011F2C501DA

8

Field Service Ver. 1.0 Sep. 2008 3. Periodical check

3.4.2 Replacing the tray 1 feed roller A. Periodically replaced parts/cycle

• Tray 1 feed roller: Every 300,000 prints

B. Procedure

1. Open the right door.

2. Remove two screws [1].

bizhub C20

[1]

[2]

[1]

[1]

[1]

A0FDF2C003DA

A00FF2C004DA

Maintenance

3. Remove two screws [1], and remove
the cover [2].

4. Remove two screws [1], and remove
two springs [2].

[2]

[2]

[1]

A00FF2C005DA

9

3. Periodical check Field Service Ver. 1.0 Sep. 2008

bizhub C20

Maintenance

[1]

[1]

[1]

[2]

[2]

5. Remove the screw [1], and remove
the cover [2].

A00FF2C006DA

6. Pull the hook part [1] in the direction
of the arrow and remove it.
Remove the transport unit [2].

A0FDF2C004DA

7. Remove four screws [1], and remove
the tray 1 feed roller unit [2].

10

[2]

A0FDF2C005DA

Field Service Ver. 1.0 Sep. 2008 3. Periodical check

[2]

[1]

[1]

[1]

[2]

[2]

[3]

8. Remove the E-ring [1] and remove
the bearing [2]. Then, slide the tray 1
feed roller assy [3] in the direction of
the arrow shown.

bizhub C20

A00FF2C009DA

NOTE

• When reinstalling the tray 1 feed

roller assy, make sure that the shaft
[2] sits on the front side of the stop­per [1] as shown in the illustration.

Maintenance

[2] [3]

[1]

A00FF2C507DA

9. Remove the E-ring [1], and remove
the clutch [2] and the feed roller [3].

A00FF2C010DA

11

3. Periodical check Field Service Ver. 1.0 Sep. 2008

NOTE

• When reinstalling the feed roller [1]
and the clutch, make sure that it is
mounted in the direction shown in

bizhub C20

[1]

A011F2C503DA

the illustration on the left.

3.4.3 Replacing the ozone filter A. Periodically replaced parts/cycle

• Ozone filter: Every 120,000 prints

B. Procedure

1. Hold onto the handle of the ozone fil-

ter [1] and slide it out of the machine.

Maintenance

[1]

A0FDF2C500DA

2. Install a new ozone filter in the machine.

3. Replace the transfer roller.

See P.21

12

Field Service Ver. 1.0 Sep. 2008 3. Periodical check

3.4.4 Replacing the toner cartridge (C/M/Y/K) A. Periodically replaced parts/cycle

• Toner cartridge furnished with the machine (C, M, Y, K): Every 8,000 prints

• High-capacity toner cartridge (C, M, Y, K): Every 8,000 prints

B. Removal procedure

1. Open the front cover.

2. Slide the lock lever [1] to the right.

[1]

Y

A0FDF2C501DA

3. Pull down the lock lever to unlock the
toner cartridge.

Y

bizhub C20

Maintenance

[1]

[2]

Y

[1]

A0FDF2C502DA

4. Grasp the toner cartridge handle [1]
and pull the toner cartridge [2] out.

Y

Y

A0FDF2C503DA

13

3. Periodical check Field Service Ver. 1.0 Sep. 2008

C. Reinstallation procedure

1. Take the toner cartridge out of its plastic bag.

2. Gently shake the toner cartridge [1]

three times to agitate the toner.

bizhub C20

Maintenance

[2]

[1]

A00FF2C119DA

3. Grasp the toner cartridge handle [1]
and slide the toner cartridge [2] in.

[1]

Y

Y

A0FDF2C504DA

4. Remove the protective sheet by pull-

[1]

Y

Y

A0FDF2C505DA

ing it.

14

Field Service Ver. 1.0 Sep. 2008 3. Periodical check

5. Raise the lock lever [1].

Y

Y

[1]

A0FDF2C506DA

6. Slide the lock lever [1] to the left to
lock the toner cartridge.

[1]

Y

A0FD2C507DA

7. Close the front cover.

NOTE

• When removing or reinstalling the toner cartridge while it is being used or after it
has been used up, do not hold it or place it upside down, as spilled toner could
result.

bizhub C20

Maintenance

15

3. Periodical check Field Service Ver. 1.0 Sep. 2008

K

3.4.5 Replacing the imaging unit (C,M,Y,K) A. Periodically replaced parts/cycle

• Imaging unit: Every 3,000 prints

B. Removal procedure

bizhub C20

1. Open the front cover.

2. Slide the lock lever [1] to the right.

K

Maintenance

[1]

[1]

[2]

A0FDF2C508DA

3. Pull down the lock lever [1] to unlock
the imaging unit.

[1]

K

K

A0FDF2C509DA

4. Press down the “Push” marked place
[1].

5. Pull the imaging unit [2] out.

K

A0FDF2C510DA

16

Field Service Ver. 1.0 Sep. 2008 3. Periodical check

C. Reinstallation procedure

1. After removing the plastic bag, hold
the imaging unit [1] with your hands
and shake it two times as shown in
the left illustration.

P
US

H

K

[1]

P
U
S
H

Y

bizhub C20

P

U
S

H

Y

Maintenance

A00FF2C127DA

2. Take the imaging unit [1] out of the

[1]

plastic bag and remove the shipping
tape.

PU

S

H

K

A00FF2C128DA

17

3. Periodical check Field Service Ver. 1.0 Sep. 2008

bizhub C20

Maintenance

[1]

P

U

SH

A00FF2C129DA

4. Slide the imaging unit [1] in.

3. Remove the protective cover [1].

[1]

K

A0FDF2C511DA

5. Raise the lock lever [1].

18

K

[1]

K

A0FDF2C512DA

Field Service Ver. 1.0 Sep. 2008 3. Periodical check

6. Slide the lock lever [1] to the left to
lock the imaging unit.

K

bizhub C20

[1]

7. Close the front cover.

[1]

A0FDF2C513DA

NOTE

• When installing and removing the

imaging unit, take care not to touch
the surface of the PC drum [1].

Maintenance

A00FF2C133DA

19

3. Periodical check Field Service Ver. 1.0 Sep. 2008

3.4.6 Replacing the waste toner bottle A. Periodically replaced parts/cycle

• Waste toner bottle: Every 36,000 prints (when printed in black only) /
9,000 prints (when printed in color only)

B. Removal procedure

bizhub C20

1. Open the front cover.

2. Turn the lever [1] to unlock the waste

toner bottle.

Lock Unlock

Maintenance

[1]

[2]

[1]

4. To reinstall, reverse the order of removal.

A0FDF2C514DA

3. Holding the left and right handles [1],
remove the waste toner bottle [2].

A0FDF2C515DA

20

Field Service Ver. 1.0 Sep. 2008 3. Periodical check

3.4.7 Replacing the transfer roller A. Periodically replaced parts/cycle

• Transfer roller: Every 120,000 prints

B. Removal procedure

1. Open the right door.

2. Hold onto the tab [1] and raise the

[2]

transfer roller assy [2] in the direction
shown by the arrow.

[1]

A00FF2C508DA

bizhub C20

[1]

[1]

A00FF2C509DA

[2]

A00FF2C510DA

3. Unlock the lock lever [1].

Maintenance

4. Hold onto the tab and raise the trans­fer roller [2] in the direction shown by
the arrow.

21

3. Periodical check Field Service Ver. 1.0 Sep. 2008

5. Remove the transfer roller [1].

[1]

bizhub C20

A00FF2C511DA

6. To reinstall, reverse the order of removal.

[2]

[1]

Maintenance

A00FF2C512DA

NOTE

• When reinstalling the transfer roller
[1], do that while unlocking the lock
lever [2] as shown on the left.

7. Replacing the ozone filter.

See P.12

8. From the Menu, select [MAINTENANCE MENU] → [SUPPLIES REPLACE] →
[TRANSFER ROLLER] and execute this function to reset the transfer roller counter
value.

For details, see “Adjustment/Setting.”

9. From the Menu, select [MAINTENANCE MENU] → [AIDC MODE] and execute this
function.

For details, see “Adjustment/Setting.”

22

Field Service Ver. 1.0 Sep. 2008 3. Periodical check

3.4.8 Replacing the transfer belt A. Periodically replaced parts/cycle

• Transfer belt: Every 120,000 prints

B. Removal procedure

1. Turn OFF the power switch.

2. Open the front cover.

3. Remove the waste toner bottle.

See P.20

4. Remove the imaging unit (C, M, Y, K).

See P.16

5. Remove the left cover.

See P.61

6. Open the right door.

[1] [1]

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7. Loosen two screws [1], and unlock
the transfer belt.

bizhub C20

Maintenance

[1]

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8. Open the left side cover [1].

23

1

3. Periodical check Field Service Ver. 1.0 Sep. 2008

bizhub C20

Maintenance

[1]

9. Slide the shutter lever [1] to the front.

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10. Grasp the transfer belt [1] handle
and pull the transfer belt [1] out.

[1]

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11. Remove the packing materials from
the new transfer belt.

NOTE

• Use care not to touch the belt of the

transfer belt.

24

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Field Service Ver. 1.0 Sep. 2008 3. Periodical check

[1][1]

12. Insert the transfer belt [2] along the
rails [1].

NOTE

• When inserting the unit, use care

not to allow the docking gear to hit
against the rail or other mechanism
to prevent damage.

[2]

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13. To reinstall, reverse the order of removal.

14. From the Menu, select [MAINTENANCE MENU] → [SUPPLIES REPLACE] →

[TRANSFER BELT] and execute this function to reset the transfer belt counter value.

For details, see “Adjustment/Setting.”

15. From the Menu, select [MAINTENANCE MENU] → [AIDC MODE] and execute this

function.

For details, see “Adjustment/Setting.”

bizhub C20

Maintenance

25

3. Periodical check Field Service Ver. 1.0 Sep. 2008

3.4.9 Replacing the fuser unit

CAUTION

• The temperature gets high in the vicinity of the fuser unit. You may get

bizhub C20

burned when you come into contact with the area. Before replacement
operations, make sure that more than 20 minutes have elapsed since the
main and sub power switches were turned off.

A. Periodically replacing parts/cycle

• Fuser unit: Every 120,000 prints (continuous printing) / Every 100,000 prints (2P/J)

B. Procedure

1. Turn OFF the power switch, unplug the power cord from the power outlet, and let the
machine to stand idle for about 20 min.

2. Open the front cover.

[1]

Maintenance

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3. Open the scanner unit [1].

4. Open the right door.

26

5. Using a coin, remove the two screws

[1] on the left side.

[1][1]

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Field Service Ver. 1.0 Sep. 2008 3. Periodical check

[1]

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6. Remove the fuser unit [1].

7. Install the new fuser unit.

8. From the Menu, select [MAINTENANCE MENU] → [SUPPLIES REPLACE] → [FUSER

UNIT] and execute this function to reset the fuser unit counter value.

For details, see “Adjustment/Setting.”

bizhub C20

Maintenance

27

4. Service tool Field Service Ver. 1.0 Sep. 2008

4. Service tool

4.1 Service material list

bizhub C20

Cleaning pad 000V-18-1 10pcs/1pack

Isopropyl alcohol ⎯

4.2 CE tool list

Maintenance

Laser lens cleaning tool 1 A011 1901 ##

Laser lens cleaning tool pad 1 4138 2018 ##

Tool name Shape Material No. Remarks

A02EF2C526DA

A00KF2C506DA

Tool name Shape Quantity Parts No.

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28

Field Service Ver. 1.0 Sep. 2008 5. Remote Setup Utility

5. Remote Setup Utility

5.1 About RSU

• RSU software (Remote Setup Utility) provides utility setting and also service setting with
ease through the intermediary of PC.

• The PC is connected to user machine via the phone line or standard USB interface port.

• Using the RSU software allows checking the user machine conditions from a distance
place.

5.2 Outline

5.2.1 Corresponding OS

• Windows 2000, Windows XP, Windows Server 2003, Windows Vista.

5.2.2 PC environments

• Modem built-in PC or the PC on which external modem is connected where communica­tion is possible using modem.

5.3 Connection methods

• The connection methods include the following two ones:

bizhub C20

Remote connection (service side)

PC

PC

5.3.1 Remote connection (Phone line connection)

• Connecting to the phone line where the PC is connected to user machine via the modem
and switching device allows user machine conditions to be checked from a distant place.

NOTE

• When the phone line connection is to be made, set [ADMIN. MANAGEMENT] ­[REMOTE MONITOR] to [ON].

See P.136

• RSU does not allow FAX communication. It should be notified to the user that FAX
transmission, and the operation and setting of other user machines are not
allowed during use of RSU.

• You should not carry out local connection through other ports during remote con­nection with the PC, which is being currently used.

Remote

USB

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Maintenance

29

5. Remote Setup Utility Field Service Ver. 1.0 Sep. 2008

5.3.2 Local connection (USB connection)

• Local connection allows the user machine conditions to be checked through connecting
to the user machine directly via the USB port.

NOTE

bizhub C20

• You should install the TWAIN driver before performing local connection.

5.4 Setup

5.4.1 Setup of PC

(1) Installing the RSU software

• You should download the RSU software beforehand into the computer where RSU is run­ning.

1. Open the RSU software folder, which was downloaded before.

2. Double-click [RSU V0xx.exe].

Maintenance

5.4.2 Connection and access of user machine

(1) Connection through phone line (remote connection)

1. Verify that user machine can run fax communication (communication standby status)

2. Connect the PC modem with the phone line.

3. Boot the RSU software in PC.

4. Select the [Remote Connect] from the menu.

5. Click [Next].

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30

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Field Service Ver. 1.0 Sep. 2008 5. Remote Setup Utility

6. Enter the telephone number of the destination party.

7. Click [OK].

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(2) Local connect (USB connect)

1. You should install TWAIN driver beforehand.

2. Connect the PC with user machine.

3. Boot the RSU software in PC.

4. Select the [USB Connect] from the menu.

5. Click [Next].

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Maintenance

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6. The message [ADMINISTERED BY PC PLEASE WAIT!] appears on the machine
screen.

ADMINISTERED BY PC

PLEASE WAIT!

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31

5. Remote Setup Utility Field Service Ver. 1.0 Sep. 2008

5.5 Operation

5.5.1 Job list

Setting Description Refer

bizhub C20

Maintenance

New Create a new dial setting. P. 3 2

Open File Read the setting information previously saved. P. 3 5

USB Connect Connect machine by USB.

Remote Connect Connect machine by Remote.

Update Firmware Update firmware to machine. P. 3 6

Clear Memory Data Clear all the contents of a memory. P. 3 7

Clear SRAM Data Clear all image memory. P. 3 8

P. 3 0

5.5.2 New (Dial setting)

1. Select the [New] from the menu.

2. Click [Next].

32

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Field Service Ver. 1.0 Sep. 2008 5. Remote Setup Utility

(1) Favorite
NOTE

• Before registering destinations in the favorite list, register them as [Speed Dial] or [Group Dial]

destinations.

1. Select the [Favorite] tab and double-click the “Favorite list” to be set.

bizhub C20

2. Select either “Speed Dial List” or “Group Dial List” and click [Save].

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Maintenance

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33

5. Remote Setup Utility Field Service Ver. 1.0 Sep. 2008

• To delete a Favorite list
Select the “Favorite list” to be deleted and click [Delete].

• To print a Favorite list
Click [Print].

3. Click [Next].

bizhub C20

Maintenance

4. Select [Upload by USB] or [Upload by Remote Connect] according to the connection

with the user machine.

5. Click [Next].

A0FDF2E553DA

A0FDF2E549DA

34

Field Service Ver. 1.0 Sep. 2008 5. Remote Setup Utility

5.5.3 Open File

1. Select the [Open File] from the menu.

2. Click [Next].

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3. Select open KONICA MINOLTA bizhub C20 RSU format file (*.DAT).

bizhub C20

Maintenance

A0FDF2E543DA

35

5. Remote Setup Utility Field Service Ver. 1.0 Sep. 2008

5.5.4 Update Firmware

1. Select the [Update Firmware] from the menu.

2. Click [Next].

bizhub C20

3. Select open KONICA MINOLTA bizhub C20 RSU format file (*.BIN).

Maintenance

A0FDF2E544DA

36

A0FDF2E545DA

Field Service Ver. 1.0 Sep. 2008 5. Remote Setup Utility

5.5.5 Clear Memory Data

1. Select the [Clear Memory Data] from the menu.

2. Click [Next].

A0FDF2E546DA

3. Select [Upload by USB] or [Upload by Remote Connect] according to the connection
with the user machine.

4. Click [Next].

bizhub C20

Maintenance

A0FDF2E547DA

37

5. Remote Setup Utility Field Service Ver. 1.0 Sep. 2008

5.5.6 Clear SRAM Data

1. Select the [Clear SRAM Data] from the menu.

2. Click [Next].

bizhub C20

3. Select [Upload by USB] or [Upload by Remote Connect] according to the connection

Maintenance

with the user machine.

4. Click [Next].

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38

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Field Service Ver. 1.0 Sep. 2008 5. Remote Setup Utility

5.6 Function setting

1. Select the function.

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NOTE

• For details of each menu, see “Adjustment/Setting” and make the settings as nec-

essary.

See P.127

2. Click [Next].

bizhub C20

Maintenance

A0FDF2E540DA

39

5. Remote Setup Utility Field Service Ver. 1.0 Sep. 2008

3. Select [Upload by USB] or [Upload by Remote Connect] according to the connection
with the user machine.

4. Click [Next].

bizhub C20

5. This completes the setting change procedure for the user machine.

Maintenance

A0FDF2E549DA

40

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Field Service Ver. 1.0 Sep. 2008 5. Remote Setup Utility

5.7 Troubleshooting

5.7.1 Error message list

Error Message list Causes

File format is error! Please select valid format ! • The format of file name list is incorrect.

Error opening USB Port !

Machine busy

Machine timeout

Connect error !
Change to off-line edit mode.

Please input [Dial Number] !

Connect Fail ! • Remote connection has been failed.

“ ” is not a valid integer value !

Invalid password : must be within 0000 to 9999 !

Invalid password : must be within 000000 to 999999 !

Phone number must be specified ! • Telephone number must be specified.

E-Mail address must be specified ! • Nothing is entered in E-mail address.

E-Mail address is invalid ! • E-mail address is incorrect.

Password is not correct !

Group name Required !

Data List is empty !

THE PARTY IS FULL

• The USB port, which was specified, cannot
be used for the computer that is in use.

• Since user machine is in use, it does not
enable connection.

• Timeout occurs during connection with user
machine.

• Connection is not established because the
USB cable is disconnected during USB con­nection or the user machine is turned OFF.

• No number is entered into the phone number
list.

• The characters other than numeric value are
entered.Or nothing is entered as being blank.

• The password entered is not correct.

• Since password is incorrect in “Administrator”
of “Utility Setting”, it does not enable connec­tion.

• Nothing is entered into group name list.

• There is no group location list when register­ing the group.

• When trying to register destinations more
than 50.

bizhub C20

Maintenance

41

6. Firmware upgrade Field Service Ver. 1.0 Sep. 2008

6. Firmware upgrade

6.1 Controller firmware upgrading

6.1.1 Preparations for firmware upgrading

bizhub C20

NOTE

• Make sure that the scanner driver has been installed in the PC.

• Before updating the firmware, print Configuration Page to confirm the current
Controller Firmware Version.

See P.122

6.1.2 Upgrading procedure

1. Connect the machine and PC using the USB cable.

2. Turn ON the machine's main switch pressing Menu/Select key.

3. Confirm that [*BOOTROM MODE*] appears on the screen.

2008/08/01 V0.13

BOOTROM MODE

Maintenance

2008/08/01 V0.13

SAPPHIRE BOOTROM

A0FDF2C576DA

4. Copy the firmware data and upgrading program in any arbitrary directory of the PC.

5. Double-click “Update.exe”.

6. Click [Browse] and select File path, “XXXXX.bin".

7. Click [Update].

A0FDF2C591DA

42

Field Service Ver. 1.0 Sep. 2008 6. Firmware upgrade

8. Firmware updating starts.

FIRMWARE UPDATE

PLEASE WAITING
UPDATE FAX F/W

FIRMWARE UPDATE

FIRMWARE UPDATE

A0FDF2C529DA

9. When [Transfer Successfully!] message appears on the screen, click [OK] to close the
execution tool.

bizhub C20

Maintenance

A0FDF2C530DA

10. Confirm that [FIRMWARE UPDATE OK] message has been displayed, and turn OFF/
ON the machine's main switch.

FIRMWARE UPDATE

FIRMWARE UPDATE OK

MACHINE POWER OFF/ON

A0FDF3C531DA

11. Print [CONFIGURATION PAGE] to confirm the Controller Firmware Version.

See P.122

43

6. Firmware upgrade Field Service Ver. 1.0 Sep. 2008

6.2 Firmware upgrading procedure by updater

6.2.1 Updating method

• To update the firmware, perform “Firmware Updater.”

bizhub C20

A. System requirements

• PC with a Pentium 2, 400 MHz or faster processor
(A Pentium 3, 500 MHz or faster processor is recommended.)

• Apple Macintosh computer with a PowerPC G3 or later proces­sor (A PowerPC G4 or later is recommended.)

• MacOS X 10.2 or later
(We recommend installing the newest patch.)

• 10Base-T/100Base-TX/1000Base-T Ethernet

• USB 2.0 (High Speed) compliant

• Parallel (IEEE 1284)

Maintenance

Computer

OS

Available

hard disk space

Memory • 128 MB or more

Interface

Windows

Macintosh

Windows • Microsoft Windows Windows 2000 or later

Macintosh

Windows • Approximately 20 to 26 MB

Macintosh • Approximately 30 to 42 MB

Windows

Macintosh • 10Base-T/100Base-TX/1000Base-T Ethernet

44

Field Service Ver. 1.0 Sep. 2008 6. Firmware upgrade

B. Connection for Windows
(1) Starting the firmware updater

NOTE

• Before starting the firmware updater, turn on the printer, and make sure that it is
correctly connected.

1. Download the firmware updater.

2. Double-click “xxxxxxxxxxxx.exe.”

3. The printer name and firmware version are displayed. Click the [Next].

A011F2E555DA

bizhub C20

Maintenance

4. The license agreement is displayed. Select “I agree”, and then click the [Next].

A011F2E556DA

45

6. Firmware upgrade Field Service Ver. 1.0 Sep. 2008

5. The list of printer drivers is displayed. Select the appropriate connection for the environ­ment where the printer is being used.

bizhub C20

• For a network connection: Select “Network port.”

See P.47

• For a local connection: Select “Local port.”

Maintenance

See P.50

• When specifying the IP address of the printer: Select “Printer IP address.”

See P.51

NOTE

• If you select “Network port” or “Local port”, make sure that the printer driver has

been installed.

• If you select “Printer IP address”, the firmware can be updated even if a printer

driver is not already installed.

A011F2E557DA

46

Field Service Ver. 1.0 Sep. 2008 6. Firmware upgrade

(2) For a network connection

1. When “Network port” is selected, a list of printer drivers for the network port appears.

2. Select the printer driver, and then click the [Next].

A011F2E558DA

3. A message appears, requesting confirmation to update the firmware. Click the [Start] to
begin transferring the firmware.

NOTE

• Do not turn off the printer while its firmware is being updated.

bizhub C20

Maintenance

A011F2E559DA

47

6. Firmware upgrade Field Service Ver. 1.0 Sep. 2008

4. The result of the firmware transfer is displayed. Click the [Exit].

bizhub C20

5. If the firmware was successfully updated, the printer will automatically restar t.

Maintenance

A011F2E560DA

48

Field Service Ver. 1.0 Sep. 2008 6. Firmware upgrade

<If spooling of the data fails>

NOTE

• If spooling fails, data may remain in the printer spooler. Delete this data, and then

try again.

1. If spooling of the data fails, the following message appears.

2. Click [OK].

A011F2E561DA

3. Check that the printer is ready and that it is correctly connected, and then click the
[Update again].

bizhub C20

Maintenance

A011F2E562DA

49

6. Firmware upgrade Field Service Ver. 1.0 Sep. 2008

(3) For a local connection

1. When “Local port” is selected, a list of printer drivers for the local port appears.

2. Select the printer driver, and then click the [Next].

bizhub C20

3. A message appears, requesting confirmation to update the firmware. Click the [Start] to

Maintenance

begin transferring the firmware.

NOTE

• Do not turn off the printer while its firmware is being updated.

A011F2E563DA

50

A011F2E564DA

Field Service Ver. 1.0 Sep. 2008 6. Firmware upgrade

4. The result of the firmware transfer is displayed. Click the [Exit].

A011F2E565DA

5. If the firmware was successfully updated, the printer will automatically restart.

<If spooling of the data fails>

For details, see “For a network connection.”
See P.49

(4) When specifying the IP address of the printer

1. When “Printer IP address” is selected, the “Printer IP address” box becomes available.

2. Type in the IP address, and then click the [Next].

bizhub C20

Maintenance

A011F2E566DA

51

6. Firmware upgrade Field Service Ver. 1.0 Sep. 2008

3. A message appears, requesting confirmation to update the firmware. Click the [Start] to
begin transferring the firmware.

NOTE

• Do not turn off the printer while its firmware is being updated.

bizhub C20

Maintenance

4. The result of the firmware transfer is displayed. Click the [Exit].

A011F2E567DA

5. If the firmware was successfully updated, the printer will automatically restar t.

52

A011F2E565DA

Field Service Ver. 1.0 Sep. 2008 6. Firmware upgrade

<If transferring of the data fails>

1. If transferring of the data fails, the following message appears.

2. Click [OK].

A011F2E569DA

3. Check that the printer is ready and that it is correctly connected, and then click the
[Update again].

bizhub C20

Maintenance

A011F2E570DA

53

6. Firmware upgrade Field Service Ver. 1.0 Sep. 2008

C. Connection for Macintosh
(1) Starting the firmware updater and the updating procedure

NOTE

• Before starting the firmware updater, turn on the printer, and make sure that it is

bizhub C20

correctly connected.

1. Download the firmware updater.

2. Double-click “xxxxxxxxxxxx.”

3. The printer name and firmware version are displayed. Click the [Next].

Maintenance

4. The license agreement is displayed. Select “I agree”, and then click the [Next].

A011F2E571DA

54

A011F2E572DA

Field Service Ver. 1.0 Sep. 2008 6. Firmware upgrade

5. The screen for specifying the IP address of the printer appears.

A011F2E573DA

6. Type in the IP address, and then click the [Next].

bizhub C20

Maintenance

A011F2E574DA

7. A message appears, requesting confirmation to update the firmware. Click the [Start] to
begin transferring the firmware.

NOTE

• Do not turn off the printer while its firmware is being updated.

A011F2E575DA

55