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The essentials of imaging
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Trademarks
The following are trademarks or registered trademarks of their respective owners. Other product names mentioned in this manual may also be trademarks or registered trademarks of their respective owners. Registered trademarks are registered in the United States Patent and Trademark Office; some trademarks may also be registered in other countries. QMS, magicolor, and the MINOLTA-QMS logo are registered trademarks of MINOLTA-QMS, Inc. Minolta is a trademark of Minolta Co., Ltd.
Copyright Notice
This manual is Copyrighted © 2001 by MINOLTA-QMS, Inc., One Magnum Pass, Mobile, AL 36618. All Rights Reserved. This manual may not be copied in whole or in part, nor transferred to any other media or language, without the express written permission of MINOLTA-QMS, Inc.
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.
WARNING CAUTION
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 technicians from doing what is graphically represented inside the marking. Used to instruct the service technicians to do what is graphically represented inside the marking.
WARNING
1. Always observe precautions. · Parts requiring special attention in this product include a label containing the mark shown on the left plus precautionary notes. Be sure to observe the precautions. · Be sure to observe the "Safety Information" given in the user documentation. 2. Before starting the procedures, be sure to unplug the power cord. · 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. · This product uses a laser, laser beam leakage may cause eye damage or blindness.
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3. Use the specified parts. · For replacement parts, always use the genuine parts specified in the parts manual. Installing a wrong or unauthorized part could cause dielectric breakdown or overload, or undermine safety devices resulting in possible electric shock or fire. · Replace a blown electrical fuse or thermal fuse with its corresponding genuine part specified in the 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. 4. Handle the power cord with care and never use a multiple outlet. · 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 connected. Be sure the power outlet meets or exceeds the specified capacity. 5. Be careful with the high-voltage parts. · A part marked with the symbol shown on the left carries a high voltage. Touching 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. 6. Do not work with wet hands. · 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. 7. Do not touch a high-temperature part. · 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 surrounding parts. 8. Maintain a grounded connection at all times. (This item may not apply in the USA.) · Be sure to connect the ground wire to the ground terminal even when performing 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. 9. Do not remodel the product. · 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.
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10. Restore all parts and harnesses to their original positions. · To promote safety and prevent product damage, make sure the harnesses are returned to their original positions and properly secured in their clamps and saddles 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.
CAUTION
1. Precautions for Service Jobs · 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 could result in a malfunction, 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. 2. Precautions for Servicing with Covers and Parts Removed · 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 in 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.
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3. Precautions for the Working Environment · 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. 4. Precautions for Handling Batteries (Lithium, Nickel-Cadmium, etc.) · Replace a rundown battery with the same type as specified in the manufacturer's parts manual. · Before installing a new battery, make sure of the correct polarity of the installation 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. 5. Precautions for the Laser Beam (Only for Products Employing a Laser) · Removing the cover marked with the indicated caution label could lead to possible 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 protective 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."
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Other Precautions
· 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 HANDLING 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 "HANDLING 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 particular 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.
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Safety Information
All Areas INTERNAL LASER RADIATION · · · · · Maximum average radiant power: 31.3 X 10-6 W Wavelength: 770810 nm This product employs a Class IIIb Laser Diode. The Laser Diode and Scanning Polygon Mirror are incorporated in the print head unit. The print head unit is NOT A FIELD SERVICE ITEM. Therefore, the print head unit should not be opened under any circumstances.
WARNING: Use of controls, adjustment or performance of procedures other than those specified in this manual may result in hazardous radiation exposure. U.S.A. LASER SAFETY This LBP printer 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 Food, Drug and Cosmetic Act of 1990. This means that the LBP printer does not produce hazardous laser radiation. Since radiation emitted inside the LBP printer is completely confined within protective housing and external covers, the laser beam cannot escape from the LBP printer during any phase of user operation. CDRH REGULATIONS The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration implemented regulations for laser products on August 1, 1976. These regulations apply to laser products manufactured from August 1, 1976. Compliance is mandatory for products marketed in the United States. The label shown in the figure indicates compliance with the CDRH regulations and must and be attached to laser products marketed in the United States. CLASSIFICATION OF THE LASER PRODUCT This product is classified as a Class 1 Laser Product under the CDRH Regulations, U.S.A. This is a semiconductor laser. The maximum power of the laser diode is 5mW and the wavelength is 770810 nm. Denmark ADVARSEL: Usynlig laserståling vad åbning, når sikkerhedsafbrydere er ude af funktion. Undgå udsttelse for stråling. Klasse 1 laser produkt der opfylder IEC60825 sikkerheds kravene. Finland, Sweden VAROITUS!: Laitteen käyttäminen muulla kuin tässä käyttöohjeessa maintulla tavalla saattaa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle. VARNNING: Om apparaten används på annat sätt än i denna bruksanvisning specificerats, kan använderen utsattas för osynling laserstrålnig, som överskrider gransen för laserklass 1. VARO: Avattaessa ja suojalukitus ohitettaessa olet alttiina nakymattomalle lasersateilylle. Aja katso sateeseen. VARNING: Osynlig laserstråining när denna del är öppnad och spärren är urkopplad. Batrakta ej stråien. Norway ADVERSEL: Dersum apparatet brukes på annen måte enn spesifisert i denne bruksanvisning, kan brukeren utsettes for unsynlig laserstråling som overskrider grensen for laser klasse 1. Dette er en halvleder laser. Maksimal effect til laserdiode er 5mW og bølgelengde er 770810 nm. User Instruction (for all users) The outlet should be located near the printer and should be easily accessible.
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Please read the following for your own protection.
CAUTION
Opening the cover indicated by Caution label below may expose you to harmful laser radiation which could cause damage or loss of eyesight. Do not open the cover when the power is on.
PRECAUTIONS
(1) Precautions Refer to D: DISASSEMBLY/CLEANING for the disassembly procedure. 1. When unplugging connectors on the PWBs themselves, always make sure the power is OFF first. Be sure to unplug the printer before disassembling and cleaning. 2. Always unplug connectors by holding the connector housing. Pulling on the wires can lead to problems with poor contact. 3. It is recommended that a body ground not be used when carrying out any troubleshooting procedure. Be sure to ground DC lines to a ground test point on the PWB (2) At Replacement/Adjustment/Cleaning 1. Be sure to handle the Fusing Unit carefully. It remains hot a while after the printer is turned off. 2. Do not disassemble the Imaging Cartridge or Print Head Unit.
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3. Do not expose the PC Drum of the Imaging Cartridge to direct sunlight for more than 1 minute or to room lighting for more than 5 minutes. 4. Turn off the power before removing the Print Head Unit to protect the eyes from possible exposure to the laser beam. 5. Use a Fuse only of the indicated rating. (3) During Operation 1. Keep your hands, clothing, etc. well away from operating or rotating parts. 2. Never touch the terminals of electrical parts or high voltage parts. 3. This printer uses an invisible laser beam. To prevent a laser beam leak, the printer performs a trial run to make sure the covers are in position.
Handling The Pwb
Observe the following precautions when handling a PWB with ICs. (1) During Transportation/Storage 1. During transport and storage, PWBs should be kept in conductive bags or on mats and not taken out unless absolutely necessary. 2. PWBs should be stored in a place where direct sunlight does not strike them. 3. Do not touch IC terminals with your hands. (2) At Replacement 1. Before removing connectors from a PWB, make sure the printer has been unplugged. 2. When PWBs are taken out of their conductive bags or off their mats, hold them by their edges to avoid touching the terminals or the patterned surfaces. 3. Before installing connectors on a PWB, make sure the printer has been unplugged. (3) At Inspection 1. Avoid checking a PWB with testers; instead, use operating parts of the printer, indicator lamps, and other means to evaluate operational conditions. 2. Be careful not to short-circuit IC terminals when using metal tools or screws. 3. If it is necessary to touch elements on the PWB with your hand, make sure your body is properly grounded.
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Contents A. INSTALLATION
1-1 Installation environment ...................................................................................................A-2 1 Precautions when installing ....................................................................................................A-2 2-1 Transporting......................................................................................................................A-3 2-2 Connecting the ground......................................................................................................A-3 2 Installation...............................................................................................................................A-3 2-3 Installation space ..............................................................................................................A-4
B. GENERAL INFORMATION
1-1 Printer............................................................................................................................ B-2 1 Product specifications ............................................................................................................. B-2 1-2 Parts .................................................................................................................................. B-5 1-3 Options.............................................................................................................................. B-5 2-1 3-1 Display section and key functions ................................................................................ B-8 Printer............................................................................................................................ B-9 2 Control panel........................................................................................................................... B-8 3 Part names ............................................................................................................................... B-9 3-2 5-Bin Mailbin.................................................................................................................. B-11 4-1 5-1 5-2 6-1 6-2 7-1 8-1 8-2 Paper path.................................................................................................................... B-13 Printer.......................................................................................................................... B-14 5-bin mailbin ............................................................................................................... B-15 Printer.......................................................................................................................... B-17 5-Bin Mailbin .............................................................................................................. B-18 Printer.......................................................................................................................... B-19 Printer.......................................................................................................................... B-22 Circuit board layout diagrams..................................................................................... B-23 4 Printer block diagrams .......................................................................................................... B-13 5 Component layout ................................................................................................................. B-14 6 Gear/roller layout .................................................................................................................. B-16
7 Electrical Components layout ............................................................................................... B-19 8 Connector layout ................................................................................................................... B-22 9 Power-on sequence ............................................................................................................... B-25
C. MECHANICAL AND ELECTRICAL
1-1 1-2 1-3 1-4 Overview ....................................................................................................................... C-2 Multipurpose tray .......................................................................................................... C-3 Upper tray ..................................................................................................................... C-4 Lower tray ..................................................................................................................... C-5 1 Paper take-up section .............................................................................................................. C-2
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1-5 1-6 2-1 3-1 3-2 3.3 4-1 4-2 4-3 4-4 4-5 4-6 4-7 5-1 5-2 5-3 5-4 5-5 5-6 5-7 5-8 5-9
Timing roller ................................................................................................................. C-6 OHP sensor .................................................................................................................. C-7 OPC Drum .................................................................................................................... C-8 In the Sub-scanning direction (Vertical scan direction)................................................ C-9 In the Scanning direction (Horizontal scan direction) .................................................. C-9 Printing range .............................................................................................................. C-10 Color developing process............................................................................................ C-11 Toner cartridges .......................................................................................................... C-12 Developing position of the toner cartridge ................................................................. C-13 Toner cartridge ............................................................................................................ C-14 Developing .................................................................................................................. C-15 Toner empty detection ................................................................................................ C-15 Unit contact terminals and names ............................................................................... C-16 Image transfer belt unit ............................................................................................... C-17 First transfer ................................................................................................................ C-18 Second transfer............................................................................................................ C-18 Temperature and humidity sensor............................................................................... C-19 Image transfer roller pressure contact and release spacing......................................... C-20 Erase (before image transfer ....................................................................................... C-21 Automatic Image Density Control (AIDC)................................................................. C-21 AIDC sensor................................................................................................................ C-22 Image transfer belt cleaner contact and release........................................................... C-23
2 OPC drum charge section ....................................................................................................... C-8
3 Exposure section ..................................................................................................................... C-9
4 Developing section................................................................................................................ C-11
5 Image transfer section ........................................................................................................... C-17
5-10 Waste toner collection mechanism ............................................................................. C-24 5-11 Waste toner collecting container................................................................................. C-24 5-12 Waste toner full detection ........................................................................................... C-25 5-13 Suction transfer ........................................................................................................... C-26 6-1 6-2 6-3 6-4 6-5 8-1 8-2 9-1 Fusing unit................................................................................................................... C-27 Fusing temperature control ......................................................................................... C-28 Temperature control .................................................................................................... C-29 Fusing speed switching ............................................................................................... C-30 Fusing roller pressure release...................................................................................... C-31 Paper path.................................................................................................................... C-33 Duplex printing method .............................................................................................. C-34 Paper exit modes ......................................................................................................... C-36 6 Fusing section ....................................................................................................................... C-27
7 Paper exit section .................................................................................................................. C-32 8 Duplex unit............................................................................................................................ C-33
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9-2 9-3 9-4 9-5
Paper path.................................................................................................................... C-36 Switching arm operation ............................................................................................. C-37 Paper guide operation.................................................................................................. C-38 Paper empty and paper full detection.......................................................................... C-39
9 5-Bin Mailbin........................................................................................................................ C-36
D. DISASSEMBLY AND CLEANING
1-1 1-2 1-3 1-4 1-5 2-1 2-2 2-3 2-4 3-1 3-2 3-3 3-4 3-6 3-7 3-8 3-9 Parts to be replaced .......................................................................................................D-3 Parts to be cleaned.........................................................................................................D-4 Service tools ..................................................................................................................D-4 Screws ...........................................................................................................................D-4 Fuse ratings ...................................................................................................................D-5 Mounting the rail for the image transfer belt unit .........................................................D-6 Mounting the developing motor....................................................................................D-6 Mounting the rack motor...............................................................................................D-6 Variable resistors on the circuit board ..........................................................................D-6 Removing the exterior covers ......................................................................................D-7 PWB-A (Main circuit board) ......................................................................................D-10 PU1 (Power supply) ....................................................................................................D-10 HV1 and HV2 (High-voltage circuit boards)..............................................................D-10 Transport motor...........................................................................................................D-11 Fusing pressure motor .................................................................................................D-11 Fan motors...................................................................................................................D-11 Laser safety switch (CDRH-SW)................................................................................D-13 1 Inspection and maintenance ....................................................................................................D-3
2 Items not to be handled ...........................................................................................................D-6 3 Disassembly procedures..........................................................................................................D-7
3-10 Waste toner full sensor................................................................................................D-13 3-11 Multipurpose tray take-up solenoid ............................................................................D-13 3-12 Multipurpose paper take-up tray .................................................................................D-14 3-13 Cassette paper take-up section ....................................................................................D-14 3-14 Transport section.........................................................................................................D-15 3-15 Developing section......................................................................................................D-17 3-16 Laser unit section ........................................................................................................ D-19 3-17 Image transfer section .................................................................................................D-19 3-18 Belt cleaner section .....................................................................................................D-20 3-19 Fusing section .............................................................................................................D-22 3-20 Paper exit section ........................................................................................................D-22 3-21 Duplex unit section .....................................................................................................D-22 4-1 Disassembly ................................................................................................................D-25 4 5-bin mailbin .........................................................................................................................D-25
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4-2
Adjustment ..................................................................................................................D-29
E. TROUBLESHOOTING
1-1 1-2 1-3 3-1 3-2 3-3 3-4 3-4 4-1 4-2 5-1 5-2 5-3 5-4 5-5 5-6 5-7 5-8 5-9 Repair procedures ......................................................................................................... E-2 Initial inspection............................................................................................................ E-3 No power....................................................................................................................... E-4 Location of jam detection sensors................................................................................. E-8 Media jam upper tray/Media jam MPT (Paper take-up section) .................................. E-9 Paper jam when the power switch is turned on........................................................... E-10 Media jam transfer (image transfer section) ............................................................... E-11 Media jam fuser/media jam exit (fusing and paper exit section) ................................ E-12 Counter control ........................................................................................................... E-13 Detection (sensor) items by unit type ......................................................................... E-14 Overview ..................................................................................................................... E-15 Fusing unit errors ........................................................................................................ E-16 Fan motor errors.......................................................................................................... E-17 Error Drive motor errors ............................................................................................. E-22 Laser unit errors .......................................................................................................... E-25 Image transfer belt errors ............................................................................................ E-26 Call for Service 14 XFER ROLLER (Transfer roller error) ....................................... E-28 Service Call 17 TONER RACK (Toner cartridge rack error)..................................... E-29 Service Call 22 MAN TRAY LIFT (Multipurpose tray lifting arm error) ................. E-30 1 Troubleshooting procedures.................................................................................................... E-2
2 Test prints................................................................................................................................ E-5 3 Troubleshooting for jams ........................................................................................................ E-8
4 Unit service life control......................................................................................................... E-13
5 Troubleshooting for malfunction errors................................................................................ E-15
5-10 Service Call 21 TRANS DET SENSOR (OHP sensor error) ..................................... E-30 5-11 Memory errors............................................................................................................. E-31 6-1 6-2 6-3 Check items................................................................................................................. E-32 Messages ..................................................................................................................... E-32 Test Mode ................................................................................................................... E-33
6 5-bin Mailbin......................................................................................................................... E-32 7 Image troubleshooting........................................................................................................... E-36
INDEX
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A. INSTALLATION
A-1
1
Precautions when installing
1-1 Installation environment
Ensure the following conditions are met when installing the printer: · · · · · · · · · It is not exposed to direct sunlight. It is not exposed to rapid changes in temperature and humidity. It is not exposed to extremely high or extremely low temperature and humidity. It is not in direct contact with the outlet airflow from an air conditioner heater or ventilator. Does not have low levels of moisture, dust, and other airborne materials in the area. It is level and not subject to vibration. It is away from sources of heat, such as kerosene heaters. Does not expose the power supply to water which could cause electrical leakage. It is not exposed to volatile materials (such as thinners and gasoline) or corrosive gases.
Environmental requirements
The printer has the following operating environment requirements: Temperature: Humidity: 1035° C/5095° F 1585% Temperature fluctuation: Humidity fluctuation: 10°C/50° F per hour or less 20% per hour or less
Power requirements
The printer has the following power supply requirements: Power supply: 100V, 120V 220V, 240V 50/60 Hz Voltage fluctuation Voltage fluctuation Frequency fluctuation ±10% or less ±10% or less ±3 Hz or less
· When other electrical appliances are plugged into the same power outlet, make sure that the current capacity of the outlet is not exceed. · When using sockets with multiple outlets, never plug in excessive numbers of cords. · Make sure that following conditions are met after the printer has been installed. * The power cord is free of cracks, damage, and other defects.
* The plug from the power cord is securely inserted into the socket. * The plug from the power cord is not abnormally hot.
A-2
2
Installation
2-1 Transporting
Before moving the printer, always remove the drum cartridge, toner cartridge, media, and any optional equipment. WARNING Never attempt to lift the printer alone. Always use two people when removing the printer from its shipping package and when transporting it. The printer weighs approximately 40 kg/88 lb without the drum cartridge and toner cartridge. If it is lifted by one person, back injury could occur or the printer could be dropped and damaged.
* Always remove the toner cartridge before transporting the printer. If the printer is transported without removing the
toner cartridge, the vibration will cause toner to fall onto the laser lens cover.
2-2 Connecting the ground
Always ground the printer to prevent electrical leakage, shocks and other such hazards. · Always connect the ground wire to a proper ground point, such the ground terminal of the outlet or a ground point that complies with local electrical standards. · Never connect the ground wire to an incomplete ground point, such as a gas pipe, the ground wire for a telephone, or a water pipe.
A-3
2-3 Installation space
Always provide adequate space around the printer to ensure proper cooling and easy inspection and maintenance. Refer to the dimensions in the following diagrams when installing.
Top view
100 mm (4")
400 mm (16")
100 mm (4")
Height 950 mm or (37-13/32")
950 mm (38")
450 mm (18")
950 mm (38")
A-4
B. GENERAL INFORMATION
1
Product specifications
1-1 Printer
Type: Printing system: Print resolution: Print range: Print speed: Desktop full-color laser beam printer Laser diode and polygon mirror scanning 600 dpi × 600 dpi (without controller) Black and white: Color: First printing time Monochrome printing Ordinary plain paper Single print A4 A5 Letter, B5 Legal Postcards Duplex print A4, Letter Multi print speed Monochrome printing Ordinary plain paper Single print A4, A5 Letter, B5 Legal Postcards Duplex print A4, Letter Media size: Media type: Special media: Paper take-up system: 13 -- 5 -- 20 20 -- 3.8 -- 3.8 5 4 -- 2.4 -- 2.4 Transparencies, Thick paper 25 -- 37 -- Unit: Sheets Color printing Ordinary plain paper Transparencies, Thick paper 16 16 16 17 -- 29 28 28 -- 27 25 25 25 26 -- 38 37 38 -- 36 Transparencies, Thick paper (W) 208 mm × (L) 348 mm (8.19" × 13.69") (W) 208 mm × (L) 348 mm (8.19" × 13.69") Unit: Seconds Color printing Ordinary plain paper Transparencies, Thick paper
A4, A5L, JIS B5L, Letter (8.5" × 11"), Legal (8.5" × 14"), Invoice (8.5" × 5.5"), Regulation postcards (Lengthwise only) Ordinary plain paper (6090 g/m2) (1624 lbs) Transparencies, letterhead paper, labels, thick paper (91163 g/m2) (2443 lbs), Postcards (J-Post), envelopes 3-way system Multipurpose tray: Upper tray: Lower tray: 150 sheets 500 sheets 500 sheets (Option)
B-2
Multipurpose tray Paper type Minimum A5 Maximum Legal size Ordinary plain paper Letterhead paper Thick paper Labels J-Post Transparencies Envelopes -- Weight: No specifications Paper size 92 mm × 210 mm (3.62" × 5.85") 216 mm × 356 mm (8.5" × 14.02") Paper type Ordinary plain paper 6090 g/m2 (1624 lbs) Capacity 150 sheets 90 g/m2 (24 lbs.) 50 sheets Same as the minimum and maximum sizes shown above Weight: 91163 (24.343.7 lbs) g/m2 50 sheets 50 sheets 10 envelopes
· Does not apply for legal-size thick paper. · No weight and thickness specifications have been set for envelopes. · The paper take-up direction is lengthwise for all media sizes. Upper tray, Lower tray (Optional) Paper type A4 Letter Legal Transparencies Paper size 210 mm × 297 mm (8.27" × 11.69") 216 mm × 279 mm (8.5" × 11") 216 mm × 356 mm (8.5" × 14.02") 216 mm × 279 mm (8.5" × 11") 6090 g/m2 (1624 lbs.) Paper type Capacity
500 sheets 80 g/m2 (21 lbs.)
50 sheets
· Does not apply for thick paper. · The paper take-up direction is lengthwise for all paper sizes. Paper exit system: Warm-up time: Acoustic noise: Power supply: Power consumption: Face-down system, ordinary plain paper 500 sheets/A4 or letter (80 g/m2) 150 seconds/100V, 120 V or less, 160 seconds/ 220V 240V or less (23° C/73.4° F, rated voltage) Standby 41 dB(A) or less (Average value) / Printing 55 dB(A) or less (Average value) AC100V 12A/50/60Hz, 120V 10A 50/60 Hz, 220V 240V 6A 50/60 Hz Maximum 1000 W/100V, 120 V, 1100W/220V 240V Printing: Monochrome 700W or less / Color 550W or less Standby: 250W or less (Controller 5V-6A) Heater OFF: 30W or less (Controller 5V-1.4A) 463 mm (W) × 564 mm (D) × 511 mm (H)/18.22"(W) × 22.22"(D) × 20"(H) Approximately 39 kg/86 lb (without OPC drum, toner cartridge, control panel, and controller) 159.9 mm/6.3" per second Single element developing system Comb electrode scorotron system Photoconductive drum Blade system
Dimensions: Weight: System speed: Developing system: OPC drum system: OPC drum: OPC drum cleaning:
B-3
Image transfer system: Separation system: Fusing system: Waste toner collection system: Environmental compatibility:
Transport image transfer belt system, Paper image transfer: Roller image transfer Curvature separation system + charge neutralizing (comb) Belt heat fusing system + oil coating roller Stored in waste toner container Power save function using the sleep mode
Recommended paper
Paper type Mono Plain paper1 Color Color Color Envelopes2 Xerox 4024 Microprint Laser 1000 Neusiedler Color Copy Hammermill Laser Print Radiant White Commercial #10: Sphinx International DL: Auto Fil #1914 (white) Color Color Color Mono Mono Transparency3 Mono Color Color Color Color Color Mono Q-Media P/N - 1710464-001 Q-Media P/N - 1710464-002 Q-Media P/N - 1710464-003 Q-Media P/N - 1710465-001 Q-Media P/N - 1710465-002 Q-Media P/N - 1710465-003 Q-Media P/N - 1730796-001 Q-Media P/N - 1730796-002 Q-Media P/N - 1730796-003 Q-Media P/N - 1730796-004 Q-Media P/N - 1710117-001 Q-Media P/N - 1710118-003 Letter Letter A4 Letter Letter A4 Letter Letter A4 A4 A4 A4 Note Letter Letter A4 Letter
1 It is not recommended to use perforated or 3-hole punched, long-grain plain (16 to24 lb/60 to 90 g/m2), or long-grain
thick stock (up to 60 lb cover, 90lb index/163 g/m2) 2 Envelopes must not have fastners, clasps, transparent windows, peel-off strips for sealing, or material that will melt, vaporize, off-set, dicolor, or emit dangerous fumes at the fusing temperature (200°C/392°F). Use commonoffice envelopes with diagonal joints, sharp folds and edges, and ordinary gummed flaps. Only print envelopes via the multipurpose tray. 3 Use only transparencies meeting normal photocopier standards that can withstand the fusing temperature (200°C/ 392°F).
1-2 Parts
B-4
Parts provided
User manual: Power cord: OPC drum unit: Toner cartridge: Fusing oil roller: Yellow, Magenta, Cyan, Black
Parts already mounted
Waste toner container: Laser lens cover: Fusing unit: Image transfer belt: Secondary image transfer roll: Upper tray: A4/Letter, Legal 500 sheet cassette
1-3 Options Lower tray
Paper types: Paper sizes: Paper take-up capacity: Power supply: Size: Weight: Ordinary plain paper (6090 g/m2, 1624 lbs) A4, Letter, Legal Ordinary plain paper 500 sheets 5V printer (Power supply from printer) 435 mm (W), 488 mm (D), 116.5 mm (H) 17.1" (W), 19.2 (D), 4.6" (H) Approximately 6.0 kg (13.25 lb) (Including cassette)
Duplex unit
Paper types: Paper sizes: Power supply: Size: Weight: Ordinary plain paper (6090 g/m2, 1624 lbs) A4, Letter 24V printer (Power supply from printer) 353 mm (W), 135 mm (D), 228 mm (H) 13.9" (W), 5.3" (D), 9.0" (H) Approximately 3.0 kg (6.25 lb)
5-Bin Mailbin
Type: Desktop type (connected to the exit section of the printer)
B-5
Paper feed reference: Transport method: Output section: Main unit storage section/ Mailbin switching: Storage section: Bin type: No. of bins: Bin switching: Capacity:
Center By roller Switching arm method
Fixed 5 Passage switching system Determined by paper stack height (can be stored until paper full is detected) Plain (60 to 90 g/m2 or 16-24 lbs.) Paper type OHP sheet Thick paper (91 to 163 g/m2 or 24-43 lbs.) Postcard Envelope Paper size Maximum ( ) is inches Minimum ( ) is inches CD FD CD FD Not usable Not usable Not usable 215.9 mm (8.5) 297 mm 210 mm 279.4 mm (11) Approximately 14 mm Approximately 50 Not usable
Paper empty detection: Paper full detection: Paper speed: Power supply: Power consumption: Consumed current: Dimensions: Weight (including accessories) Operating environment:
By lever and photo interrupter (provided for each bin) By lever and photo interrupter (provided for each bin) Speed of main unit × 1.013 AC 100 240V, 50 60 Hz 24 W or less DC 16V (1.5 A) 390 (W) × 438 (D) × 400 (H) mm/15.34" (W) × 17.25" (D) × 15.81" (H) 7.2 kg/16.2 lbs. Conforms to printer
B-6
Signal (Drawer connector) Pin No. 1. 2. 3. 4. 5. 6. 7. 8. . . . 14 Empty Empty Empty Mailbin transmit Mailbin receive Set detection Main unit GND Name 5-bin mailbin Printer Printer Printer Signal source
Empty
B-7
2
Control panel
2-1 Display section and key functions
LCD display LED display Control keys
Name LED display LCD display Control keys Status display (Online Data) Message display
Function
Function setting (Menu key, cancel key, execute key, up/down key, right/left key
B-8
3
Part names
3-1 Printer
2 1 5 6 10 3 4 9
7 8 11 14 15
12
13
16
17 18 19
1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Control panel Out put tray Upper-door lock-release button Right-door lock-release button Multipurpose tray Right side grip Lower-right door 1.2 Upper tray Power switch Left side grip
11. 12. 13. 14. 15. 16. 17. 18. 19.
Power cord socket Fusing unit Oil coating roller OPC drum Toner cartridge Image transfer belt unit Waste toner container Image transfer roller unit Laser lens cover for laser unit
B-9
Printer control levers
The following shows the control levers with the printer with the front cover open and the waste toner container removed. 1 2
7
3
6
5 No. 1. 2. 3. Name Image transfer belt unit Image transfer belt unit left release lever Image transfer belt unit right release lever
4 Function The toner image overlays the four YMCK colors for developing. This is used for removing the OPC drum/transfer belt unit. This retracts the image transfer roller from the image transfer unit for removing the image transfer belt unit. This is used when removing the Y, M, C, K, Toner cartridges and image transfer belt. It is used to turn the rack and align each of the color cartridges with the removal port. This is used to release the lock for the knob (dial) used for turning the rack. This is the opening for removing toner cartridge. This is used to pull the toner cartridge forward.
4.
Toner cartridge rack dial
5. 6. 7.
Toner cartridge rack release button Toner cartridge removal port Toner cartridge eject lever
B-10
3-2 5-Bin Mailbin External view (front when connected to printer)
5th bin 4th bin 3th bin 2th bin 1st bin
External view (back when connected to printer)
AC inlet
Power supply switch
AC outlet (to printer)
B-11
Cross-sectional view
7 6
4
5
8 3 9 2 1
1. 2. 3. 4. 5. 6. 7. 8. 9.
Switching arm Paper guide Paper exit roller (for each bin) Paper empty sensor (for each bin) Paper full sensor (for each bin) Bin tray (1st to 5th bin, from bottom) Upper paper exit sensor circuit board Lower paper exit sensor circuit board Paper guide, home position sensor
B-12
4
Printer block diagrams
4-1 Paper path
Front surface printing paper Rear surface printing paper
Fuser Image transfer belt
OPC Toner
Image transfer roller
Upper tray
No. 1. 2. 3. 4. 5.
Name Multipurpose section Paper take-up section OPC drum charge section Exposure section Developing section
No. 6. 7. 8. 9.
Name Image transfer section Fusing section Paper exit section Duplex printing section (option)
B-13
5
Component layout
5-1 Printer
6 7 8 9 10 11 12 13
5 4 3 2 1 14 15 16 17 18 19 20 21 22 23 27 24 26 25
No. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
Name Toner cartridge rack Toner cartridge Sleeve roller OPC drum Image transfer belt unit Electrode roller Image transfer belt Fusing unit Paper exit roller Oil coating roller Fusing belt Paper exit sensor Heater lamp Duplex printing unit (option)
No. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27.
Name Duplex paper sensor (option) Transport paper sensor Image transfer roller Timing roller Timing roller paper sensor OHP (transparency)-detecting sensor Multipurpose tray Paper empty sensor Paper take-up roller Paper empty sensor Near-empty sensor Paper lifting arm Laser unit
B-14
5-2 5-bin mailbin
PWB-B PC11
PC10 PC7 PC8 PC5 PC6 PC3 PC4 PC1 PC2
PC9
PWB-C PC12
PC1 PC2 PC3 PC4 PC5 PC6 PC7 PC8 PC9 PC10 PC11 PC12 PWB-B PWB-C
1st bin - paper empty sensor 1st bin - paper full sensor 2nd bin - paper empty sensor 2nd bin - paper full sensor 3rd bin - paper empty sensor 3rd bin - paper full sensor 4th bin - paper empty sensor 4th bin - paper full sensor 5th bin - paper empty sensor 5th bin - paper full sensor Door sensor Paper guide - Home position sensor Upper paper exit sensor circuit board Lower paper exit sensor circuit board
B-15
6
Gear/roller layout
B-16
6-1 Printer
4 5 7
3 2 1 6 8
9 10 12 11 *14 * Option
*13
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
Rack motor (M3) Developing motor (M2) Transport motor (M1) Fusing contact motor (M5) Fusing motor (M4) Image transfer unit Paper exit roller Paper exit roller Multipurpose tray Cassette paper take-up roller Timing roller OPC drum * Transport roller * Cassette paper take-up roller Timing roller OPC drum Transport motor
Belt Image transfer roller Image transfer roller contact pressure solenoid
Transport roller
Multipurpose tray take-up roller
* Clutch Cassette paper take-up roller Transport roller
B-17
6-2 5-Bin Mailbin
1
2
3
4
1. 2. 3. 4.
Transport motor (M1) Paper guide motor (M2) Paper guide drive gear Switching arm drive gear
B-18
7
Electrical Components layout
M4
7-1 Printer
M10
M5 M11
PU1
M1
SL5
S3 M9 SL4 HV2
SL7
SL8 M7 PWB-D H1 H2
M8
M3
M2
M12 PWB-I
PC8 SL3 M6 PWB-Çb
M1D M2D
PWB-A LU
HV1
PWB-AD
SL1C
LA1
B-19
S3 PC8 TH2 TS2 TH1 TS1 PC3 PC15 PC20 PC11 S1 PC6 PC16 HS1 S8 PC1 TE1 PC7 S2 S10 PC1D S4
PC14
S5
PC2
PC4 PC5 PC12 PC13
PC3C
Å@(PWB-H) PC4C
PC1C PC2C
Code LA1 H1 H2 HS1 HV1 HV2 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 Eraser lamp
Name
Code PC20 LU PU1 PWB-A PWB-C PWB-D PWB-1 S1 S2 S3 S4 S5 S8 S10 SL3 SL4 SL5
Name Transport paper sensor Laser unit Power supply unit Main circuit board Laser control circuit board (In LU) Fusing controller circuit board Belt cleaner circuit board Power supply switch Interlock switch Front right Interlock switch Upper rear Interlock switch Right side Laser safety switch Upper tray paper sensor switch Waste toner container Laser lens cover switch Cassette paper take-up solenoid Transport roller solenoid Timing roller solenoid
Heater lamp (Heat roller) Heater lamp (Pressure roller) Humidity sensor High-voltage unit 1 High-voltage unit 2 Transport motor Developing motor Rack motor Fusing motor Fusing pressure contact motor Polygon motor laser unit section) Suction fan motor Power supply cooling fan motor Ozone fan motor Fusing fan motor Toner suction fan motor
B-20
M12 PC1 PC2 PC3 PC4 PC5 PC6 PC7 PC8 PC10 PC11 PC12 PC13 PC14 PC15 PC16
Belt cleaner motor Upper tray paper empty sensor Upper tray paper near empty sensor Multipurpose tray empty sensor Upper tray door open sensor Timing roller paper sensor Black toner cartridge home position sensor Image transfer roller contact pressure sensor Paper exit sensor Fusing pressure contact position sensor Transparency (OHP) sensor Image transfer belt positioning sensor Waste toner full sensor Pressure roller release sensor Multipurpose tray position sensor Belt cleaner separation position sensor
SL7 SL8 TE1 TH1,2 TS1,2 Options MD1D* MD2D* PC1D* PC1C* PC2C* PC3C* PC4C* S1C* S1C*
Image transfer roller contact pressure solenoid Multipurpose tray take-up solenoid Toner empty sensor Thermistor 1,2 Thermostat 1, 2
Switchback motor Duplex paper take-up motor Duplex paper take-up sensor Paper near-empty sensor Paper empty sensor Door open sensor Paper take-up sensor Paper size switch Paper take-up solenoid
B-21
8
Connector layout
8-1 Printer
CN45 CN8 CN68 CN19
CN45
CN68
CN116
Connector CN8 CN19 CN45 CN68 CN116
Number of pins 7×2 11 8 14 12 -- Duplex unit Fusing unit Image transfer unit Lower tray (Option)
Unit name
B-22
8-2 Circuit board layout diagrams
PWB-A main circuit board
PJ22 PJ21 PJ18
(7P)
PJ30
(3P)
(5P)
(6P)
PJ25 (2P) PJ29 (3P) (Transfer) PJ15 (14P)
PJ11 (4P) PJ32
(13P)
PJ34
(4P)
PJ33 (4P)
PJ2 (9P)
PJ15 (14P)
(Duplex)
PJ16 (3P) PJ1 (60P) (Controller)
PJ26 (11P) PJ6 PJ13 (4P) PJ5 (10P) PJ3 (20P) PJ28 (3P) PJ20 (5P) PJ10 (6P) PJ17(4P
) (20P)
PJ12 (8P)
(LU)
PJ14 (2P) PJ8 (18P)
(HV1)
PJ19 PJ7
(5P) (9P)
PJ9
(16P) (2nd Cassette)
PJ27
(5P)
( ) indicates number of pins ( ) indicates connection destination
B-23
Do not tamper with the factory settings for VR. and RV.
PU1
CN5 (4P) CN1 F
VR62 VR61
CN3 CN6 CN4 (9P)
HV2 HV1
VR101 F001
R W R W
F
R
CN4
(9P)
RV501
RV201 RV20
RV102
F1
RV601
PWB-I
RV103 RV106
HV2
CN1 PJ1 (4P) PJ2 (13P) PJ3 (6P) PJ4 PJ6 (3P) PJ5 (4P)
B-24
9
Power-on sequence
The following diagram shows the initialization process the printer follows after the power is turned on.
Power on
Option check
· Lower tray, duplex unit, 5-bin mailbin
Paper misfeed check Cover open check Units connected check
· Checks if the covers are open. Names of covers: front cover R/L, fusing cover, transport cover, upper tray door, duplex unit door, mailbin door. · Checks connected units. Names of units: fusing unit, image transfer unit, oil coating roller, waste toner container, laser lens cover. · The warm-up of the fusing unit starts. · The rack is rotated and the installation of the toner cartridge is confirmed. · OHP sensor checked. · The black toner cartridge is aligned with the home position. · The image transfer belt is cleaned.
Warm-up start Preliminary rotation
Rack initialization Cleaning
New toner cartridge check
· Detects a new toner cartridge.
Automatic Image Density Contol (AIDC) check
· Checks the Automatic Image Density Control of each color YMCK.
Warm-up completed
Initialization completed
B-25
C. MECHANICAL AND ELECTRICAL
1
Paper take-up section
1-1 Overview
The paper take-up system is a two-way system consisting of the multipurpose tray (150 sheets) and upper tray (500 sheets). If the optional lower tray is added (500 sheets), the paper take-up system becomes a three-way system. 1 2
3
4
10 9 8 7 5 6
13
12
11
Name 1. Paper-separating pad 2. Paper take-up roller 3. Multipurpose tray 4. Multipurpose tray empty sensor (PC3) 5. Multipurpose tray position sensor (PC15) 6. Vertical transport roller 7. Paper take-up roller 8. Paper transport roller 9. Transparency (OHP) sensor 10. Timing roller 11. Paper empty sensor (PC1) 12. Paper near empty sensor (PC2) 13. Paper size switch
Function Prevents multiple sheets of paper from being fed. Feeds the paper in the multipurpose tray. Stores paper. Detects when there is no paper in the multipurpose tray. Detects the upper and lower position amount of the multi-purpose tray. Transports the paper that has been fed to it. Feeds the paper in the cassette. Transports the paper to the timing roller. Detects if the sheet that has been fed is transparency film. Aligns the paper with the Print (image) Starting position and transport it. Detects when there is no paper in the cassette. Detects when there are approximately 50 sheets remaining in the cassette. Detects the size of the paper in the cassette.
C-2
1-2 Multipurpose tray
The drive force that has been supplied from the transport motor is conveyed as follows. When the multipurpose paper take-up solenoid (SL8) is set on, the take-up clutch engages and drive power is conveyed to the take-up roller, and one sheet of paper is lifted up and transported by the Vertical Transport Roller/Paper Transport Roller. The frictional force of the separator pad prevents the second sheet of paper from being sent simultaneously. If the transparency (OHP) sensor (PC11) detects transparency film, the speed of the system is reduced. Multipurpose paper take-up solenoid (SL8)
C-3
1-3 Upper tray
The drive force that has been supplied from the transport motor is conveyed as follows. When the paper take-up solenoid (SL3) is set on, the take-up clutch engages and drive power is conveyed to the take-up roller, and one sheet of paper is lifted up and transported by the Vertical Transport Roller/Paper Transport Roller roller. The frictional force of the separator pad prevents the second sheet of paper from being sent simultaneously. · The paper size is detected by the paper size switch and paper size setting plate. The paper size is determined by the combined L and H signals from the switches as shown in the table below. SW1 L H H SW2 H H H Other SW3 H L H Paper size Letter Legal A4 Cassette not set
· The opening of the cassette door for correcting a paper jam is detected by door open sensor (PC4).
Cassette paper take-up solenoid (SL3) Paper size switch (S8)
Cassette Rear view
Cassette Side view
Paper size setting plate
Upper tray door open sensor (PC4)
C-4
1-4 Lower tray
Lower tray can store up to 500 sheets of paper. Its design and function are the same as upper tray. A paper take-up miss of lower tray is detected by the newly added lower tray paper take-up sensor. The tray paper take-up sensor detects whether or not paper take-up has been properly performed. If the paper take-up has not been properly performed, it is detected as a paper jam (misfeed). Refer to "1-2 Upper tray" on the previous page for details about other design and function items. 8 2 1 3 4 5
7
6
Name 1. Paper size/tray detection switch 2. Paper take-up solenoid 3. Paper take-up sensor 4. Paper take-up roller 5. Transport roller 6. Paper empty sensor 7. Paper near empty sensor 8. Drive Transmission Gear
Function Detects the size of the paper in the tray and whether or not there is a cassette tray. Provides drive power to the paper take-up roller. Optional cassette only. Picks up and feeds the top-most sheet of paper. Transports the paper to the transport roller and timing roller. Detects when there is no paper in the cassette tray. Detects when there are approximately 50 sheets remaining in the cassette. Drive motors are not installed in this tray. The drive for feeding and transporting paper is transmitted from the printer via the Drive Transmission Gear.
C-5
1-5 Timing roller
The timing roller corrects the angular movement of the paper that has been sent from the paper take-up section and adjusts the timing so that the end position of the visible image on the image transfer belt is the same as the edge of the paper. The timing roller rotates when the timing roller solenoid (SL5) is set on. · When the timing roller paper sensor (PC5) detects the edge of the paper that has been transported from the paper takeup has reached the timing roller, the transport roller solenoid is set on and transport of the paper is temporarily stopped by the timing roller. · Only during color printing, if the timing sensor is not set on within a specified time after the paper take-up solenoid (SL 8) has been set on, the paper take-up is performed again to prevent a paper take-up miss. · The timing sensor detects the length of the paper at the same time it detects the edge of the paper. If the paper is longer or shorter than the specified length, a paper size error is detected. Main unit Rear view
Timing roller solenoid (SL5)
Transport roller solenoid (SL4)
Timing roller paper sensor (PC5)
C-6
1-6 OHP sensor
This sensor detects when transparent (OHP) film is being used. Because the film is transparent, the LED light from the light-emitting section of the sensor passes through it and is reflected by the Prism Lens mounted at the top of the sensor. This light enters the Prism Lens (LED light), and the presence of the OHP film is detected. Ordinary plain paper prevents the light from entering the photo sensor, and it is therefore not detected as OHP film. If the paper that has been set (OHP) is actually ordinary plain paper, the printout will be white.
OHP film Prism Lens
Ordinary plain paper
LED
photo sensor
OHP sensor
C-7
2
OPC drum charge section
Before exposing to laser light, the comb electrode scorotron system is used to perform a minus (-) scorona discharge to the surface of the OPC drum, and the ozone created by the grid mesh is drawn in by the ozone fan and removed by the ozone filter. This charges the surface of the OPC drum with an even electrical load.
2-1 OPC Drum
1 2 3
4 OPC drum ground HV1 Charge bias Grid bias 5 Removal of ozone
Name 1. OPC Drum
Function Laser light is used to create a latent image on the surface of the OPC drum, and toner is used to develop it. The image is then transferred on the image transfer belt. Scrapes off residual toner from the OPC drum. Scorona system charger for providing a minus charge to the surface of the OPC drum. Transports the waste toner that has fallen off of the OPC drum to the waste toner container. Evenly provides the created electrical load to the OPC drum.
2. Cleaning Blade 3. Comb electrode 4. Waste toner collecting coil 5. Grid
C-8
3
Exposure section
The laser light from the Laser Unit creates an electrostatic latent image on the OPC drum. When the main circuit board (PWB-A) receives a print signal from the controller, the transport motor and polygon motor (M6) are rotated, and printing begins. The image is aligned on the printing position of the paper as shown below.
3-1 In the Sub-scanning direction (Vertical scan direction)
When the image transfer belt position sensor is set on, the printer sends a TOD signal to the controller, and printing starts in the sub-scan direction.
3-2 In the Scanning direction (Horizontal scan direction)
The laser unit receives a video signal from the controller by the laser controller board (PWB-C) SOS sensor signal. Laser light is emitted, and printing starts in the main scan direction.
OPC drum
SOS sensor
Laser diode PWB-A PJ12A 1
8 PJ27A 1
6 Reflector mirror Polygon motor (M6)
C-9
3.3
Printing range
4 mm (0.16") 208 mm (8.19")
The printing range for the sub-scan direction and the main scan direction are shown below.
4 mm (0.16")
Print range
304 mm (11.97") 348 mm (13.70") Black and
C-10
4
Developing section
4-1 Color developing process
The developing and image transfer for each toner (Y,M,C,K) is performed in the sequence shown below. Drum
Yellow color
Developing and image transfer K
Y M C
Magenta color
Developing and image transfer M Y K C
Cyan color
Developing and image transfer C M Y K
Paper take-up
Black color
Developing and image transfer K C M Image transfer to paper Y
Fusing
Cleaning of image transfer belt
Paper exit
C-11
4-2 Toner cartridges
The toner cartridges for the four colors Y (yellow), M (magenta), C (cyan), and K (black) are stored on the toner cartridge rack. · During printing, the toner cartridges are rotated by the rack motor (M3), and the cartridge for each color is moved in the sequence Y, M, C, K to the developing position.
Toner cartridge rack
Toner cartridge
Y
Direction of rotation
Drum
OPC Drum
K C
M
2 1
3
Name 1. Black toner cartridge home position-detecting sensor 2. Toner empty-detecting sensor port 3. Toner color identification rib
Function The sensor and breaker plate detect when the toner cartridge for the black toner is in the developing position (home position). This port detects whether or not the toner cartridge has toner in it. This rib identifies the color of the toner when each toner cartridge is inserted into the rack.
C-12
4-3 Developing position of the toner cartridge
The developing position of each toner cartridge is controlled by the rack motor (stepping motor), which stops in each developing position.
Positioning the black toner
At the same time the rack is rotated by the rack motor (M3), the developing motor rotates in reverse to mesh the gears. When the black toner cartridge home position sensor (PC6) on the rack is set on, the rack motor stops. This rotates the developing motor forward to eliminate gear-meshing looseness.
Positioning each toner color
The home position for the black toner cartridge is used as a reference, and the rack motor is turned 90° forward each time (clockwise direction) and t