Konica Minolta bizhub C25 User manual

SERVICE MANUAL
2011.052011.05
Ver. 1.1Ver. 1.1
FIELD SERVICE

i
FIELD SERVICE TOTAL CONTENTS
SAFETY AND IMPORTANT WARNING ITEMS..............................................................S-1
IMPORTANT NOTICE ................................................................................................S-1
DESCRIPTION ITEMSFOR DANGER, WARNING AND CAUTION .........................S-1
SAFETY WARNINGS.................................................................................................S-2
INDICATION OF WARNING ON THE MACHINE .....................................................S-17
MEASURESTO TAKE IN CASE OF AN ACCIDENT ....................................................S-20
Composition of the service manual ................................................................................. C-1
Notation of the service manual ....................................................................................... C-2
bizhub C25 Main body
OUTLINE ........................................................................................................................ 1
MAINTENANCE.............................................................................................................. 7
ADJUSTMENT/SETTING ........................................................................................... 109
TROUBLESHOOTING ................................................................................................ 269
APPENDIX.................................................................................................................. 383
Lower Feeder Unit PF-P09
OUTLINE ........................................................................................................................ 1
MAINTENANCE.............................................................................................................. 3
ADJUSTMENT/SETTING ............................................................................................. 15

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SAFETY AND IMPORTANT WARNING ITEMS
S-1
Read carefully the safety and important warning items described below to understand them
before doing service work.
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.
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.
Symbols used for safety and important warning items are defined as follows:
SAFETY AND IMPORTANT WARNING ITEMS
IMPORTANT NOTICE
DESCRIPTION ITEMSFOR DANGER,
WARNING AND CAUTION
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
:Precaution when servicing the
product. General
precaution
Electric hazard High temperature
:Prohibition when servicing the
product. General
prohibition
Do not touch
with wet hand
Do not
disassemble
:Direction when servicing the
product. General
instruction
Unplug Ground/Earth

SAFETY AND IMPORTANT WARNING ITEMS
S-2
[1] MODIFICATIONSNOT 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 reason-
ing behind this policy.
SAFETY WARNINGS
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.

SAFETY AND IMPORTANT WARNING ITEMS
S-3
[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 prod-
uct’s rated voltage and current, and
- the plug has pin/terminal(s) for grounding, and
- provided with three-conductor cable having enough cur-
rent 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 connect-
ing 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 ter-
minals 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

SAFETY AND IMPORTANT WARNING ITEMS
S-4
[3] CHECKPOINTSWHEN 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 engi-
neer (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.
• 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.
kw

SAFETY AND IMPORTANT WARNING ITEMS
S-5
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 prod-
uct 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.

SAFETY AND IMPORTANT WARNING ITEMS
S-6
2. Installation Requirements
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.
Prohibited Installation Places
WARNING
• Do not place the product near flammable materials or vola-
tile 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.

SAFETY AND IMPORTANT WARNING ITEMS
S-7
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 docu-
mentation (service manual, technical notices, etc.) and
proceed with the inspection following the prescribed pro-
cedure in safety clothes, using only the prescribed tools.
Do not make any adjustment not described in the docu-
mentation.
If the prescribed procedure or tool is not used, the prod-
uct 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.

SAFETY AND IMPORTANT WARNING ITEMS
S-8
• Do not leave the machine unattended during transporta-
tion, installation, and inspection of the machine. If it is to
be unavoidably left unattended, face protrusions toward
the wall or take other necessary risk reducing action.
The user may stumble over a protrusion of the machine
or be caught by a cable, falling to the floor or being
injured.
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 elec-
tric shock exists.
• If it is absolutely necessary to service the machine with
the door open or external covers removed, always be
attentive to the motion of the internal parts.
A normally protected part may cause unexpected haz-
ards.
Safety Checkpoints
WARNING
• Check the exterior and frame for edges, burrs, and other
damage.
The user or CE may be injured.
• Whenever mounting an option on the machine, be atten-
tive to the motion of the fellow worker of the joint work.
The fellow worker may be injured with his or her finger or
hand pinched between the machine and the option.
Inspection before Servicing
CAUTION

SAFETY AND IMPORTANT WARNING ITEMS
S-9
• When mounting an option on the machine, be careful
about the clearance between the machine and the option.
You may be injured with your finger or hand pinched
between the machine and the option.
• When removing a part that secures a motor, gear, or other
moving part, disassembling a unit, or reinstalling any of
such parts and units, be careful about moving parts and
use care not to drop any part or unit. During the service
procedure, give sufficient support for any heavy unit.
You may be injured by a falling part or unit.
• Check the external covers and frame for possible sharp
edges, burrs, and damage.
They can be a cause of injury during use or servicing.
• When accessing a hard-to-view or narrow spot, be careful
about sharp edges and burrs of the frame and parts.
They may injure your hands or fingers.
• 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 electri-
cal 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.
• 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.
Safety Checkpoints
WARNING

SAFETY AND IMPORTANT WARNING ITEMS
S-10
• 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 mount-
ing 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 lith-
ium 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 installa-
tion 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.
• Make sure that all screws, components, wiring, connec-
tors, etc. that were removed for safety check and mainte-
nance 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.
Safety Checkpoints
WARNING

SAFETY AND IMPORTANT WARNING ITEMS
S-11
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 (ace-
tone-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.
• 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.

SAFETY AND IMPORTANT WARNING ITEMS
S-12
[4] 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.
4.1 Internal Laser Radiation
*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.
semiconductor laser
Maximum power of the laser diode 15 mW
Maximum average radiation power (*) 11.2 µW
Wavelength 770 - 800 nm
A2YFP0C003DA
Laser Aperture of
the Print Head Unit

SAFETY AND IMPORTANT WARNING ITEMS
S-13
U.S.A., Canada
(CDRH Regulation)
• This machine is certified as a Class 1 Laser product under Radiation Performance Stan-
dard 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.
.
All Areas
Denmark
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
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
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

SAFETY AND IMPORTANT WARNING ITEMS
S-14
Finland, Sweden
Norway
LUOKAN 1 LASERLAITE
KLASS 1 LASER APPARAT
VAROITUS!
• Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saat-
taa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle laser-
säteilylle.
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
VARO!
• Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättomälle laser-
säteilylle. Älä katso säteeseen.
VARNING!
• Osynlig laserstråining när denna del är öppnad och spärren är urkopplad.
Betrakta ej stråien.
ADVERSEL
• Dersom apparatet brukes på annen måte enn spesifisert i denne bruksanvisn-
ing, 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

SAFETY AND IMPORTANT WARNING ITEMS
S-15
4.2 Laser Safety Label
• A laser safety label is attached to the outside of the machine as shown below.
A2YFP0E002DA

SAFETY AND IMPORTANT WARNING ITEMS
S-16
4.3 Laser Caution Label
• A laser caution label is attached to the inside of the machine as shown below.
4.4 PRECAUTIONSFOR 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.
A2YFP0C004DA

SAFETY AND IMPORTANT WARNING ITEMS
S-17
Caution labels shown below 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.
INDICATION OF WARNING ON THE MACHINE
A2YFP0C005DA
CAUTION
• The area around the Fuser Unit is
extremely hot.
Touching any part other than those
indicated may result in burns.