Minolta DI450 Bedienungsanleitung

Di450/Di550

SERVICE MANUAL

[FIELD SERVICE]

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P-1

Safety Precautions for Inspection and Service

When performing inspection and service procedures, observe the following precautions to

prevent accidents and ensure utmost safety.

✽Depending on the model, some of the precautions given in the following do not apply.

Different markings are used to denote specific meanings as detailed below.

Indicates a potentially hazardous situation which, if not avoided,

could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided,

may result in minor or moderate injury. It may also be used to

alert against unsafe practices.

The following graphic symbols are used to give instructions that need to be observed.

Used to call the service technician’s attention to what is graphically represented

inside the marking (including a warning).

Used to prohibit the service technician’s from doing what is graphically repre-

sented inside the marking.

Used to instruct the service technician’s to do what is graphically represented

inside the marking.

1. Always observe precautions.

2. Before starting the procedures, be sure to unplug the power cord.

3. Use the specified parts.

WARNING

CAUTION

WARNING

•Parts requiring special attention in this product will include a label containing the

mark shown on the left plus precautionary notes. Be sure to observe the pre-

cautions.

•Be sure to observe the “Safety Information” given in the Operator’s Manual.

•This product contains a high-voltage unit and a circuit with a large current

capacity that may cause an electric shock or burn.

•The product also contains parts that can jerk suddenly and cause injury.

•If this product uses a laser, laser beam leakage may cause eye damage or

blindness.

•For replacement parts, always use the genuine parts specified in the manufac-

turer’s parts manual. Installing a wrong or unauthorized part could cause

dielectric breakdown, overload, or undermine safety devices resulting in possi-

bleelectricshockorfire.

•Replace a blown electrical fuse or thermal fuse with its corresponding genuine

part specified in the manufacturer’s parts manual. Installing a fuse of a different

make or rating could lead to a possible fire. If a thermal fuse blows frequently,

the temperature control system may have a problem and action must be taken

to eliminate the cause of the problem.

P-2

4. Handle the power cord with care and never use a multiple outlet.

5. Be careful with the high-voltage parts.

6. Do not work with wet hands.

7. Do not touch a high-temperature part.

8. Maintain a grounded connection at all times. (This item may not apply in the USA.)

9. Do not remodel the product.

10. Restore all parts and harnesses to their original positions.

•Do not break, crush or otherwise damage the power cord. Placing a heavy

object on the power cord, or pulling or bending it may damage it, resulting in a

possible fire or electric shock.

•Do not use a multiple outlet to which any other appliance or machine is con-

nected.

•Be sure the power outlet meets or exceeds the specified capacity.

•A part marked with the symbol shown on the left carries a high voltage. Touch-

ing it could result in an electric shock or burn. Be sure to unplug the power cord

before servicing this part or the parts near it.

•Do not unplug or plug in the power cord, or perform any kind of service or

inspection with wet hands. Doing so could result in an electric shock.

•A part marked with the symbol shown on the left and other parts such as the

exposure lamp and fusing roller can be very hot while the machine is energized.

Touching them may result in a burn.

•Wait until these parts have cooled down before replacing them or any surround-

ing parts.

•Be sure to connect the ground wire to the ground terminal even when perform-

ing an inspection or repair. Without proper grounding, electrical leakage could

result in an electric shock or fire.

•Never connect the ground wire to a gas pipe, water pipe, telephone ground wire,

or a lightning conductor.

•Modifying this product in a manner not authorized by the manufacturer may

result in a fire or electric shock. If this product uses a laser, laser beam leakage

may cause eye damage or blindness.

•To promote safety and prevent product damage, make sure the harnesses are

returned to their original positions and properly secured in their clamps and sad-

dles in order to avoid hot parts, high-voltage parts, sharp edges, or being

crushed.

•To promote safety, make sure that all tubing and other insulating materials are

returned to their original positions. Make sure that floating components mounted

on the circuit boards are at their correct distance and position off the boards.

P-3

1. Precautions for Service Jobs

2. Precautions for Servicing with Covers and Parts Removed

3. Precautions for the Working Environment

4. Precautions for Handling Batteries

CAUTION

•A toothed washer and spring washer, if used originally, must be reinstalled.

Omitting them may result in contact failure which could cause an electric shock

or fire.

•When reassembling parts, make sure that the correct screws (size, type) are

used in the correct places. Using the wrong screw could lead to stripped

threads, poorly secured parts, poor insulating or grounding, and result in a mal-

function, electric shock or injury.

•Take great care to avoid personal injury from possible burrs and sharp edges on

the parts, frames and chassis of the product.

•When moving the product or removing an option, use care not to injure your

back or allow your hands to be caught in mechanisms.

•Wherever feasible, keep all parts and covers mounted when energizing the

product.

•If energizing the product with a cover removed is absolutely unavoidable, do not

touch any exposed live parts and use care not to allow your clothing to be

caught in the moving parts. Never leave a product in this condition unattended.

•Never place disassembled parts or a container of liquid on the product. Parts

falling into, or the liquid spilling inside, the mechanism could result in an electric

shock or fire.

•Never use a flammable spray near the product. This could result in a fire.

•Make sure the power cord is unplugged before removing or installing circuit

boards or plugging in or unplugging connectors.

•Always use the interlock switch actuating jig to actuate an interlock switch when

a cover is opened or removed. The use of folded paper or some other object

may damage the interlock switch mechanism, possibly resulting in an electric

shock, injury or blindness.

•The product must be placed on a flat, level surface that is stable and secure.

•Never place this product or its parts on an unsteady or tilting workbench when

servicing.

•Provide good ventilation at regular intervals if a service job must be done in a

confined space for a long period of time.

•Avoid dusty locations and places exposed to oil or steam.

•Avoid working positions that may block the ventilation ports of the product.

•Replace a rundown battery with the same type as specified in the manufac-

turer’s parts manual.

•Before installing a new battery, make sure of the correct polarity of the installa-

tion or the battery could burst.

•Dispose of used batteries according to the local regulations. Never dispose of

them at the user’s premises or attempt to try to discharge one.

P-4

5. Precautions for the Laser Beam (Only for Products Employing a Laser)

•Removing the cover marked with the following caution label could lead to possi-

ble exposure to the laser beam, resulting in eye damage or blindness. Be sure

to unplug the power cord before removing this cover.

•If removing this cover while the power is ON is unavoidable, be sure to wear pro-

tective laser goggles that meet specifications.

•Make sure that no one enters the room when the machine is in this condition.

•When handling the laser unit, observe the “Precautions for Handling Laser

Equipment.”

DANGER

Invisible laser radiation when open.

AVOID DIRECT EXPOSURE

TO BEAM 0947-7127-01

1144D270AA

1167P001AA

P-5

•To reassemble the product, reverse the order of disassembly unless otherwise specified.

•While the product is energized, do not unplug or plug connectors into the circuit boards

or harnesses.

•The magnet roller generates a strong magnetic field. Do not bring it near a watch, floppy

disk, magnetic card, or CRT tube.

•An air gun and vacuum cleaner generates a strong electrostatic charge that can destroy

the ATDC sensor and other sensors. Before cleaning a component with one of these

devices, be sure to remove all the sensors. Otherwise, use a blower brush and cloth

when cleaning parts.

•When handling circuit boards with MOS ICs, observe the “INSTRUCTIONS FOR HAN-

DLING THE PWBs WITH MOS ICs” (applicable only to the products using MOS ICs).

•The PC Drum is a very delicate component. Observe the precautions given in “HAN-

DLING OF THE PC DRUM” because mishandling may result in serious image problems.

•Note that replacement of a circuit board may call for readjustments or resetting of partic-

ular items, or software installation.

•After completing a service job, perform a safety check. Make sure that all parts, wiring

and screws are returned to their original positions.

•Check the area surrounding the service site for any signs of damage, wear or need of

repair.

•Do not pull out the toner hopper while the toner bottle is turning. This could result in a

damaged hopper motor or locking mechanism.

•If the product is to be run with the front door open, make sure that the toner hopper is in

the locked position.

Other Precautions

P-6

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 ähnlichen Typ.

Entsorgung gebrauchter Batterien nach Angaben des Herstellers.

France

ATTENTION

Ily a danger d’explosion s’ily a remplacement incorrec de la batterie.

Remplacer uniquement avec une batterie du meme type ou d’un type équivalent recom-

mande par le constructueur.

Mettre au rebut les batteries usageés conformément aux instructions du fabricant.

Denmark

ADVARSEL!

Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering Udskiftning må kun ske med bat-

teri af samme fabrikat og type.

Levér det brugte batteri tilbage til leverandøren.

Norway

ADVARSEL

Eksplosjonsfare ved feilaktig skifte av batteri.

Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten.

Brukte batterier kasseres i henhold til fabrikantens instruksjoner.

Sweden

VARNING

Explosionsfara vid felaktigt batteribyte.

Använd samma batterityp eller en ekvivalent typ som rekommenderas av apparat-

tillverkaren.

Kassera använt batteri enligt fabrikantens instruktion.

Finland

VAROlTUS

Paristo voi räjähtää, los se on virheellisesti asennettu.

Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä Käytetty paristo

valmistajan ohjeiden mukaisesti.

Used Batteries Precautions

PS-1

PRECAUTIONS FOR SERVICE

When performing inspection and service procedures, observe the following precautions to

prevent mishandling of the machine and its parts.

✽Depending on the model, some of the precautions given in the following do not apply.

•When the user is using a word processor or personal computer from a wall outlet of the

same line, take necessary steps to prevent the circuit breaker from opening due to over-

loads.

•Never disturb the LAN by breaking or making a network connection, altering termination,

installing or removing networking hardware or software, or shutting down networked

devices without the knowledge and express permission of the network administrator or

the shop supervisor.

1. DIS/REASSEMBLY, ADJUSTMENT

•To reassemble the product, reverse the order of disassembly unless otherwise specified.

2. TROUBLESHOOTING

•If a component on a PWB or any other functional unit including a motor is defective, the

text only instructs you to replace the whole PWB or functional unit and does not give trou-

bleshooting procedures applicable within the defective unit.

•All troubleshooting procedures contained herein assume that there are no breaks in the

harnesses and cords and all connectors are plugged into the right positions.

•The procedures preclude possible malfunctions due to noise and other external causes.

•Check the area surrounding the service site for any signs of damage, wear or need of

repair.

•Keep all disassembled parts in good order and keep tools under control so that none will

be lost or damaged.

•After completing a service job, perform a safety check. Make sure that all parts, wiring

and screws are returned to their original positions.

•Do not pull out the toner hopper while the toner bottle is turning. This could result in a

damaged motor or locking mechanism.

•If the product is to be run with the front door open, make sure that the toner hopper is in

the locked position.

•Do not use an air gun or vacuum cleaner for cleaning the ATDC Sensor and other sen-

sors, as they can cause electrostatic destruction. Use a blower brush and cloth. If a unit

containing these sensors is to be cleaned, first remove the sensors from the unit.

Precautions Before Service

How to Use this Book

Precautions for Service

PS-2

•Be sure to unplug the copier from the outlet before attempting to service the copier.

•The basic rule is not to operate the copier anytime during disassembly. If it is absolutely

necessary to run the copier with its covers removed, use care not to allow your clothing to

be caught in revolving parts such as the timing belt and gears.

•Before attempting to replace parts and unplug connectors, make sure that the power

cord of the copier has been unplugged from the wall outlet.

•Be sure to use the Interlock Switch Actuating Jig whenever it is necessary to actuate the

Interlock Switch with the covers left open or removed.

•Do not plug in or unplug print jacks on the PWB or connect or disconnect the PWB con-

nectors while power is being supplied to the copier.

•Never use flammable sprays near the copier.

•A battery (lithium, nickel-cadmium, etc.) is used in this machine. Do not charge or short

circuit it and make sure of the correct polarity at replacement.

•A used battery should be disposed of according to the local regulations and never be dis-

carded casually or left unattended at the user's premises.

•When reassembling parts, make sure that the correct screws (size, type) and toothed

washer are used in the correct places.

•If it becomes necessary to replace the thermal fuse or any other fuse mounted on a

board, be sure to use one of the rating marked on the blown fuse. Always note the rating

marked on the fuse, as the rating and mounting site or number used are subject to

change without notice.

•Never create a closed circuit across connector pins except those specified in the text and

on the printed circuit.

•When creating a closed circuit and measuring a voltage across connector pins specified

in the text, be sure to use the GND wire.

Precautions for Dis/Reassembly

Precautions for Circuit Inspection

PS-3

1. During Transportation/Storage:

•During transportation or when in storage, new P.W. Boards must not be indiscriminately

removed from their protective conductive bags.

•Do not store or place P.W. Boards in a location exposed to direct sunlight and high tem-

perature.

•When it becomes absolutely necessary to remove a Board from its conductive bag or

case, always place it on its conductive mat in an area as free as possible from static elec-

tricity.

•Do not touch the pins of the ICs with your bare hands.

•Protect the PWBs from any external force so that they are not bent or damaged.

2. During Inspection/Replacement:

•Avoid checking the IC directly with a multimeter; use connectors on the Board.

•Never create a closed circuit across IC pins with a metal tool.

•Before unplugging connectors from the P.W. Boards, make sure that the power cord has

been unplugged from the outlet.

•When removing a Board from its conductive bag or conductive case, do not touch the

pins of the ICs or the printed pattern. Place it in position by holding only the edges of the

Board.

•When touching the PWB, wear a wrist strap and connect its cord to a securely grounded

place whenever possible. If you cannot wear a wrist strap, touch a metal part to dis-

charge static electricity before touching the PWB.

•Note that replacement of a PWB may call for readjustments or resetting of particular

items.

•The magnet roller generates a strong magnetic field. Do not bring it near a watch, floppy

disk, magnetic card, or CRT tube.

Handling of PWBs

Handling of Other Parts

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