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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 copier, as well as the
risk of damage to the copier, Konica Corporation, strongly recommends that all servicing be
performed only by Konica-trained service technicians.
Changes may have been made to this copier to improve its performance after this Service
Handbook was printed. Accordingly, Konica Corporation, makes no representations or
warranties, either expressed or implied, that the information contained in this Service
Handbook is complete or accurate. It is understood that the user of this Service Handbook
must assume all risks or personal injury and/or damage to the copier while servicing the copier
for which this Service Handbook is intended.
Therefore, this Service Handbook must be read carefully before doing service work both in the
course of the technical training and even after that, for keeping the correct maintenance and
control of the copier. Keep the Service Handbook also for the future service. When it is
impossible to read the description about safety and warning (due to contamination or tear), the
relevant page should be replaced.
DESCRIPTION ITEMS FOR DANGER, WARNING AND CAUTION
In this Service Handbook, 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 relevant works (disassembling, assembling, adjustment, repair and
maintenance) need to be conducted with utmost care.
DANGER: Actions having a high possibility of suffering death or serious
wound
WARNING: Actions having a possibility of suffering death or serious wound
CAUTION: Actions having a possibility of suffering a slight wound, medium
trouble and material damage
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SAFETY AND IMPORTANT WARNING ITEMS
SAFETY WARNINGS
[1] MODIFICATIONS NOT AUTHORIZED
BY Konica
Konica copiers are renowned for their high reliability.
This reliability is achieved through high-quality design
and a solid service network.
Photocopier 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
degrading 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 :
(1) Using extension cables or a different power
cord than specified by Konica.
(2) Using other fuses than specified by Konica.
Safety will not be assured, leading to a risk of
fire and injury.
(3) Disabling fuses or bridging fuse terminals
with wire, metal clips, solder or similar. (This
applies also to thermal fuses.)
(4) Removing air filters (except for replacement).
(5) Disabling relay functions (such as wedging
paper between relay contacts, etc.).
(6) Disabling safety functions (interlocks, safety
circuits, etc.). Safety will not be assured,
leading to a risk of fire and injury.
(7) Performing actions to copier not described in
the instruction manual or the service
handbook.
(8) Using parts other than specified by Konica.
[2] CHECKPOINTS WHEN PERFORMING
ON-SITE SERVICE
Konica copiers are extensively tested before
shipping, to ensure that all applicable safety
standards are met, in order to protect the customer
and customer engineer 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 customer
engineer must perform regular safety checks.
1. Advance Preparation for Safety
Checks
CAUTION:
(1) Wear clothing that facilitates work and is
designed for safety.
(2) Carry out all procedures carefully to prevent
injury.
(3) Be sure to disconnect the power cord of the
copier and all optional equipment from the
AC outlet.
Simply turning off the power switch is not
sufficient, because paper feed units or other
electrical equipment may be powered also
when the power switch is turned off.
(4) Proceed with special care when performing
operation checks or adjustment while the
unit is powered. When carrying out operation
checks or adjustment while external covers
are removed, the risk of electrical shock
exists when touching parts which carry high
voltage or electrical charge. The risk of injury
exists when touching moving parts such as
gears or chains.
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SAFETY AND IMPORTANT WARNING ITEMS
2. Safety Checkpoints
The following list is not exhaustive, but it includes
actions which must be carried out at every on-site
service.
CAUTION:
(1) Check external covers and the frame for
sharp edges, burrs, or nicks.
(2) Check external covers and hinges for
loosening or damage.
(3) Check wiring for squeezing or damage.
(4) Check power cord for insulation problems
(conductor must not be exposed).
(5) Check power cord and cable ties etc. for
loosening from frame.
WARNING:
(1) Verify that the copier is properly grounded. If
a problem is detected, establish a proper
ground connection.
(2) Connecting the ground lead to an improper
point such as listed below results in a risk of
explosion and electric shock.
Unsuitable ground points:
a. Gas pipe
b. Lightning rod
c. Telephone line ground
d. Plastic water pipe or water pipe or
faucet that has not been approved by
authorities for grounding use
3. Precautions for on-site service
CAUTION:
(1) Before performing safety check work, read all
relevant documentation (service handbook,
technical notices, etc.) and proceed accord-
ing to the prescribed procedure, using only
the prescribed tools. Do not carry out any
adjustments not described in the documen-
tation.
(2) If the power cord is damaged, replace it only
with the specified power cord. If the power
cord insulation has been damaged and there
are exposed sections, short-circuits and
overheating may occur, leading to a serious
fire risk.
(3) Do not route the power cord so that it can be
stepped on or pinched. Otherwise overheating may occur, leading to a serious fire risk.
(4) When disconnecting any cables, always
grasp the connector and not the cable
(especially in the case of AC and highvoltage leads).
(5) Carefully remove all toner remnants from
electrical parts, electrodes, etc.
(6) Make sure that wiring cannot come into
contact with sharp edges, burrs, or other
pointed parts.
(7) Double-check to make sure that all screws,
components, wiring, connectors, etc. that
were removed for safety check maintenance
have been reinstalled in the original location.
(Pay special attention to forgotten connectors, pinched cables, forgotten screws, etc.)
(8) When installation and preventive mainte-
nance, verify that the power cord has been
securely plugged into the AC outlet. Contact
problems may lead to increased resistance,
overheating, and the risk of fire.
WARNING:
(1) Before disassembling or adjusting the
optical unit or any parts that use a laser,
make sure that the power cord has been
disconnected.
(2) Do not remove the main cover of the write
unit. Direct exposure of the eye to laser
beams may lead to blindness.
(3) Do not turn the copier on while the write unit
is not installed in its normal position.
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SAFETY AND IMPORTANT WARNING ITEMS
(4) Danger of explosion if battery is incorrectly
replaced, replace only with the same or
equivalent recommended by the manufacturer. Discard used batteries according to the
manufacture's instructions.
VORSICHT:
Expiosionsgefahr dei unsachegemäßem Austausch der Battetie. Ersatz nur durch denselben oder einen vom. Hersteller empfohlenen
gleichwertigen Typ. Entsorgung gebrauchter
Batterien nach Angaben des Herstellers.
[3] HANDLING OF MATERIALS FOR
SERVICING
CAUTION: Drum cleaner (alcohol-based) and
roller cleaner (acetone-based) are
highly flammable and must be
handled with care. When using
these materials for cleaning of
copier parts, observe the
following precautions.
(1) Disconnect the power cord from the AC
outlet.
(2) 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.
(3) Perform cleaning only in an environment
where sufficient ventilation is assured.
Breathing large quantities of organic
solvents can lead to discomfort.
(4) Do not replace the cover or turn the unit on
before any solvent remnants on the cleaned
parts have fully evaporated.
CAUTION: 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. If the substances
get in the eye, rinse it with plenty
of water immediately. When
symptoms are noticeable, consult
a physician.
[4] 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 re-
ceived from a customer, an on-site evaluation
must be carried out quickly and Konica Corporation must be notified.
(3) To determine the cause of the accident, condi-
tions and materials must be recorded through direct on-site checks, in accordance with instructions issued by Konica Corporation.
(4) For reports and measures concerning accidents,
consult your superior, and follow the regulations
set in "Standards for the Control Program for
Measures Against Electrical Equipment Accidents".
[5] CONCLUSION
(1) Safety of users and customer engineers de-
pends highly on accurate maintenance and administration. Therefore, safety can be maintained by the appropriate by the proper daily service work conducted by the customer engineer.
(2) When performing service, each copier on the site
must be tested for safety. The customer engineer must verify the safety of parts and ensure
appropriate management of the equipment.
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SAFETY AND IMPORTANT WARNING ITEMS
SAFETY INFORMATION
IMPORTANT INFORMATION
The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug
Administration implemented regulations for laser products manufactured since August 1, 1976.
Compliance is mandatory for products marketed in the United States.
This copier is certified as a "Class 1" laser product under the U.S.
Department of Health and Human Services (DHHS) Radiation Performance Standard
according to the Radiation Control for Health and Safety Act of 1968. Since radiation emitted
inside this copier is completely confined within protective housings and external covers, the
laser beam cannot escape during any phase of normal user operation.
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SAFETY AND IMPORTANT WARNING ITEMS
SAFETY CIRCUITS
This machine's electrical circuitry includes the safety
circuits indicated below. These circuits are intended
to ensure that abnormalities do not result in major
accidents.
[1] Overall safety circuit
[2] Overheat prevention circuits for fixing heater
lamps L2 and L3
To ensure safety, these circuits must remain
operational even when servicing is in progress. Be
sure to understand the importance of these circuits,
and avoid any actions that would disable or impair
these circuits. Operation of these circuits is explained
below.
[1] Overall safety circuit protector
CBR1
NF
[2] Overheat protection circuits for
fixing heater lamps L2 and L3
TH1 TH2
PRDB
Control
section
DCPS
RL1
AC driver
section
RL1
TS
L2
L3
1. Protection function implemented by
software
The CPU reads the voltages output by TH1 and TH2
(fixing temperature sensors 1 and 2). If either voltage
is abnormal, the CPU switches off L2 (fixing heater
lamp 1), L3 (fixing heater lamp 2), and RL1 (main
relay).
CBR2
1. Protection function by circuit
breakers (CBR1 and CBR2)
Circuit breakers CBR1 and CBR2 instantly break the
connection to the AC line terminals in the event of
excess current on the AC line (short circuit, etc.).
CAUTION: CBR1/CBR2 protection must not
be disabled under any circumstances.
CAUTION: TH1 and TH2 are contact sensors,
and must remain in contact with
the roller (with no gap). Be sure
that there is no foreign matter
lodged between the sensor and
the roller.
RL1 functioning must not be disabled under any circumstances.
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2. Protection function implemented by
hardware
A comparator circuit compares the voltages output by
TH1 and TH2 (fixing temperature sensors 1 and 2)
against corresponding reference values ("abnormal
judgment" values). If either voltage exceeds the
reference value, the hardware switches off L2, L3,
and RL1.
CAUTION: Periodically check the contact
surface on sensors TH1 and TH2
(the surface that makes contact
with the roller). If the contact
surface is abnormal, replace the
sensor.
Since TH1 and TH2 remain in
contact with the roller, check to
ensure that these sensors are
installed in the correct orientation
following occurrence of any
abnormality.
RL1 functioning must not be disabled under any circumstances.
SAFETY AND IMPORTANT WARNING ITEMS
3. Protection function implemented by
thermostat (TS)
TS goes OFF if the temperature of the upper fixing
roller exceeds the specified value, directly shutting off
the power supply to L2 and L3.
CAUTION: Do not disable this function. Spe-
cifically, do not replace TS with
any other electrical conductor.
Do not change the distance between TS and the roller.
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SAFETY AND IMPORTANT WARNING ITEMS
INDICATION OF WARNING ON THE MACHINE
The caution labels are attached to the machine areas, as shown below, where you are advised
to pay special attention to avoid any dangerous situations or serious injury.
CAUTION
The fixing unit is
very hot.
To avoid getting
burned DO NOT
TOUCH.
WARNING
This area generates
high voltage. If
touched, electrical
shock may occur. DO
NOT TOUCH!
DB-209
DB-409
CAUTION
This area is very hot.
To avoid getting burned DO NOT
TOUCH.
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. If any caution label or caution indicator is soiled, clean the label.
If you cannot make it legible or if the caution label is removed, please contact your Service Centre.
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SAFETY AND IMPORTANT WARNING ITEMS
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. If any caution label or caution indicator is soiled, clean the label.
If you cannot make it legible or if the caution label is removed, please contact your Service Centre.
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