Text preview for : D 2500 SM.PDF part of minolta di250 service manual minolta di 250/ develop 2500id
Back to : D 2500 SM.PDF | Home
Service Manual
D 2500iD
DEVELOP
Digital Copier
Safety Precautions for Inspection and Service
When performing inspection and service procedures, observe the following precautions to prevent accidents and ensure utmost safety. V 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 technician's from doing what is graphically represented inside the marking. Used to instruct the service technician's to do what is graphically represented inside the marking.
WARNING
1. Always observe precautions. · 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 precautions. · Be sure to observe the "Safety Information" given in the Operator's Manual. 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. · If this product uses a laser, laser beam leakage may cause eye damage or blindness. 3. Use the specified parts. · For replacement parts, always use the genuine parts specified in the manufacturer's parts manual. Installing a wrong or unauthorized part could cause dielectric breakdown, 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 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-1
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. 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.
P-2
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 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 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. 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 · 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.
P-3
5. Precautions for the Laser Beam (Only for Products Employing a Laser) · Removing the cover marked with the following 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."
.
1167P001AA
DANGER
Invisible laser radiation when open.
AVOID DIRECT TO BEAM
EXPOSURE
0947-7127-01 1144D270AA
P-4
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.
P-5
Used Batteries Precautions
ALL Areas CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions. Germany VORSICHT! Explosionsgefahr bei unsachgemäßem Austausch der Batterie. Ersatz nur durch denselben oder einen vom Hersteller empfohlenen 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 recommande 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 batteri 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 apparattillverkaren. 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.
P-6
D 2500iD
GENERAL
CONTENTS
1. 2. 3. 4. 5. 6. 7. SAFETY INFORMATION ................................................................................. G-1 SPECIFICATIONS ........................................................................................... G-8 PRECAUTIONS FOR INSTALLATION ............................................................ G-10 PRECAUTIONS FOR USE .............................................................................. G-11 HANDLING OF THE CONSUMABLES ........................................................... G-12 OTHER PRECAUTIONS ................................................................................. G-12 SYSTEM OPTIONS ......................................................................................... G-13
i
1170SBG0100A
1
SAFETY INFORMATION
Laser Safety
This is a digital machine which prints by means of a laser. There is no possibility of danger from the laser, provided the machine is operated according to the instructions in this manual. Since radiation emitted by the laser is completely confined within protective housing, the laser beam cannot escape from the machine during any phase of user operation. This machine is certified as a Class 1 product. This means the machine does not produce hazardous laser radiation. CAUTION: The use of controls, adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure. Because of this, Develop strongly recommends that you operate your copy machine only as described in this documentation.
Internal Laser Radiation
Maximum Average Radiation Power: 36.7µW at laser aperture of the print head unit Wavelength: 770-810nm This product employs a Class IIIb Laser Diode that emits an invisible laser beam. 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. Laser Aperture of the Print Head Unit
1166O263AA
This figure shows the view inside the Right Side Door with the Imaging Unit removed.
For United States
CDRH regulation This copier is certified as a Class 1 Laser product under the Radiation Performance Standard according to the Food, Drug and Cosmetic Act of 1990. Compliance is mandatory for Laser products marketed in the United States and is reported to the Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration of the U.S. Department of Health and Human Services (DHHS). This means that the device does not produce hazardous laser radiation.
G-1
The label shown on page G-3 indicates compliance with the CDRH regulations and must be attached to laser products marketed in the United States. CAUTION: Use of controls, adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure. This is a semiconductor laser. The maximum power of the laser diode is 5mW and the wavelength is 770-810nm. For Europe CAUTION: Use of controls, adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure. This is a semiconductor laser. The maximum power of the laser diode is 5mW and the wavelength is 770-810nm. For Denmark ADVARSEL Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling. Klasse 1 laser produkt der opfylder IEC60825 sikkerheds kravene. For Finland LUOKAN 1 LASERLAITE VAROITUS Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle. VARO Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättomälle lasersäteilylle. Älä katso säteeseen. For Sweden KLASS 1 LASER APPARAT VARNING Om apparaten används på annat sätt än i denna bruksanvisning specificerats, kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laserklass 1. VARNING Osynlig laserstråining när denna del är öppnad och spärren är urkopplad. Betrakta ej stråien.
G-2
For Norway ADVERSEL Dersom apparatet brukes på annen måte enn spesifisert i denne bruksanvisning, kan brukeren utsettes för unsynlig laserstrålning, som overskrider grensen for laser klass 1. Dette en halveder laser. Maksimal effekt till laserdiode er 5mW og blgelengde er 770810nm.
Laser Safety Label
A laser safety label is attached to the outside of the copy machine as shown below. Laser safety label For Europe
CLASS 1 LASER PRODUCT LASER KLASSE 1 PRODUKT
For United States
MINOLTA CO., LTD
2, Higashiakatsuchi, Yawata-cho, Toyokawa-shi Aichi-ken 442-8585, Japan
MANUFACTURED:
Manufacturer's Name Plate
1166O261DA
THIS PRODUCT COMPLIES WITH 21 CFR CHAPTER I, SUBCHAPTER J.
0946-7101-14
1166O248AA
The Manufacturer's Name Plate is affixed at the position illustrated above. Please write down the Model Name and Serial No. of your copier here. Model: Serial No.:
G-3
Label inside copy machine
The following laser safety label will be attached inside the copy machine as shown below. Please read the following for your own protection.
Caution Opening the cover indicated by the Caution label 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.
1166O234AA
G-4
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 only VORSICHT! Explosinsgefahr bei unsachgemäßen austausch der batterie. Ersatz nur durch denselben oder einen vom hersteller empfohlenen ähnlichen typ. Entsorgung gebrauchter batterien nach angaben des herstellers. Denmark only ADVARSEL! Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering Udskiftning må kun ske med batteri af samme fabrikat og type. Levér det brugte batteri tilbage til leverandøren. Norway only 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 only VARNING Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en ekvivalent typ som rekommenderas av apparattillverkaren. Kassera använt batteri enligt fabrikantens instruktion. Finland only VAROlTUS Paristo voi räjähtää, los se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä Käytetty paristo valmistajan ohjeiden mukaisesti.
G-5
ALL Areas CAUTION "Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used IC Package according to the manufacturer's instructions." Germany only VORSICHT! "Austausch nur durch denselben oder einen vom Hersteller empfohlenen, gleichwertigen typ. Entsorgung gebrauchter Batterien nach Angaben des Herstellers.
G-6
Service Precautions
(1) Precautions Refer to DISASSEMBLY/CLEANING for the Disassembly procedure. 1. When unplugging connectors on the P.W.B.s themselves, always make sure the power is OFF first. Be sure to unplug the copier 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 P.W.B. (2) At Replacement/Adjustment/Cleaning 1. Be sure to handle the Fusing Unit carefully. It remains hot a while after the copier is turned off. 2. Do not disassemble the Imaging Cartridge or Print Head Unit. 3. Do not expose the PC Drum of the Imaging Cartridge to direct sunlight 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 only a Fuse 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 copier uses an invisible laser beam. To prevent a laser beam leak, the copier performs a trial run to make sure the covers are in position.
Handling the P.W.B.
Observe the following precautions when handling a P.W.B. with ICs. (1) During Transportation/Storage 1. During transport and storage, P.W.B.s should be kept in conductive bags or on mats and not taken out unless absolutely necessary. 2. P .W.B.s 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 P.W.B., make sure the copier has been unplugged. 2. When P.W.B.s 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 P .W.B., make sure the copier has been unplugged.
G-7
1170SBG0200A
2
TYPE
SPECIFICATIONS
: : : : : Console/Desktop Type Organic Photoconductor Electrostatic Dry Powdered Image Transfer to Plain Paper with a Laser 600 dpi 3-way system Manual Feed Tray: Single sheet feeding Multi-Purpose (MP) Cassette: Plain paper: Approx. 250 sheets Special paper: Approx. 20 sheets 500-Sheet Cassette: Approx. 500 sheets
PHOTOCONDUCTOR COPYING SYSTEM ORIGINAL SCANNING RESOLUTION PAPER FEEDING SYSTEM
EXPOSURE SYSTEM DEVELOPING SYSTEM CHARGING SYSTEM IMAGE TRANSFER PAPER SEPARATING SYSTEM FUSING SYSTEM PAPER DISCHARGING SYSTEM MAXIMUM ORIGINAL SIZE COPY MEDIUM
: : : : : : : :
Mirror Scanning, Slit Exposure MT-HG System Comb Electrode (1) DC Negative Corona with Scorotron System Roller Image Transfer Paper Separator Fingers and Charge Neutralizing Plate Heat Roller Charge Neutralizing Brush A3L, 11" × 17"L
Paper Source Plain paper (60 to 90 g/m2) Transparencies Medium Thick paper (91 to 157 g/m2) Postcards (190 g/m2) Recycled paper Dimensions
r: Permissible
MP Cassette r r r r r 297 × 432 mm 90 × 140 mm
Manual Feed Tray r r r r r 297 × 432 mm 90 × 140 mm
Maximum (Width × Length) Minimum (Width × Length)
-: Not permissible
MULTIPLE COPIES WARMING-UP TIME FIRST COPY TIME
: : :
1 to 99 60 sec. or less with room temperature of 23°C and rated power voltage 5.8 sec. (A4C, MP Cassette, full size mode) 5.9 sec. (8-1/2" × 11"C, MP Cassette, full size mode)
G-8
CONTINUOUS COPY SPEED (copies/min.) - Metric Size A3L B4L A4L A4C B5L B5C ZOOM RATIOS - Metric - Inch × 1.000 × 1.000 × 2.000 × 2.000 × 1.414 × 1.545 Enlargement × 1.224 × 1.294 × 1.154 × 1.214 × 0.785 × 0.866 × 0.733 × 0.816 Reduction × 0.707 × 0.647 × 0.500 × 0.500 25% to 400% (in 0.1% increments) Full Size : : : Through Lens (F = 4.0, f = 62 mm) Fluorescent Lamp 190°C Speed 14 16 19 25 22 29 - Inch Size 11" × 17"L 8-1/2" × 14"L 8-1/2" × 11"L 8-1/2" × 11"C Speed 14 17 20 25
Fixed
Variable LENS EXPOSURE LAMP
FUSING TEMPERATURE
POWER/CURRENT CONSUMPTION (Copier Only) Exposure Lamp (Rating) 24V 20W POWER REQUIREMENTS Fusing Roller Heater Lamp (Rating) 660W Max. Power Consump- Max. Current Contion (full system) sumption (full system) 850W 120V, 8A 230V, 4A
:
120V, 230V, 50/60Hz
ENVIRONMENTAL CONDITIONS Temperature Humidity Ambient Illumination Levelness DIMENSIONS 10 to 32°C with a fluctuation of 10°C or less per hour 15 to 85% RH with a fluctuation of 10% RH or less per hour 3,000 lux or less 1° (1.75 mm/100 mm) : Width ... 566 mm, 22-1/4" Depth ... 707 mm, 27-3/4" Height ... 635 mm, 25" 53.5 kg, 118 lbs.
WEIGHT
:
G-9
1170SBG0300A
3
PRECAUTIONS FOR INSTALLATION
Installation Site To ensure safety and utmost performance of the copier, the copier should NOT be used in a place: · Where it will be subjected to extremely high or low temperature or humidity. · Which is exposed to direct sunlight. · Which is in the direct air stream of an air conditioner, heater or ventilator. · Which puts the operator in the direct stream of exhaust from the copier. · Which has poor ventilation. · Where ammonia gas might be generated. · Which does not have a stable, level floor. · Where it will be subjected to sudden fluctuations in either temperature or humidity. If a cold room is quickly heated, condensation forms inside the copier, resulting in blank spots in the copy. · Which is near any kind of heating device. · Where it may be splashed with water. · Which is dirty or where it will receive undue vibration. · Which is near volatile flammables or curtains. Power Source Use an outlet with a capacity of 120V/8A, or 220V to 240V/4A or more. · If any other electrical equipment is sourced from the same power outlet, make sure that the capacity of the outlet is not exceeded. · Use a power source with little voltage fluctuation. · Never connect by means of a multiple socket any other appliances or machines to the outlet being used for the copier. · Make the following checks at frequent intervals: V Is the power plug abnormally hot? V Are there any cracks or scrapes in the cord? V Has the power plug been inserted fully into the outlet? V Does something, including the copier itself, ride on the power cord? · Ensure that the copier does not ride on the power cord or communications cable of other electrical equipment, and that it does not become wedged into or underneath the mechanism. Grounding To prevent receiving electrical shocks in the case of electrical leakage, always ground the copier. · Connect the ground wire to: V The ground terminal of the outlet. V A grounding contact which complies with the local electrical standards. · Never connect the ground wire to a gas pipe, the ground wire for a telephone, or a water pipe.
G-10
1170SBG0400A
4
PRECAUTIONS FOR USE
To ensure that the copier is used in an optimum condition, observe the following precautions. · Never place a heavy object on the copier or subject the copier to shocks. · Insert the power plug all the way into the outlet. · Do not attempt to remove any panel or cover which is secured while the copier is making copies. · Do not turn OFF the Power Switch while the copier is making copies. · Provide good ventilation when making a large number of copies continuously. · Never use flammable sprays near the copier. · If the copier becomes inordinately hot or produces abnormal noise, turn it OFF and unplug it. · Do not turn ON the Power Switch at the same time when you plug the power cord into the outlet. · When unplugging the power cord, do not pull on the cord; hold the plug and pull it out. · Do not bring any magnetized object near the copier. · Do not place a vase or vessel containing water on the copier. · Be sure to turn OFF the Power Switch at the end of the workday or upon power failure. · Use care not to drop paper clips, staples, or other small pieces of metal into the copier. Operating Environment The operating environmental requirements of the copier are as follows: · Temperature: 10°C to 32°C with a fluctuation of 10°C per hour · Humidity: 15% to 85% RH with a fluctuation of 10% RH per hour Power Requirements The power source voltage requirements are as follows: · Voltage Fluctuation: AC120/230V ±10% (Copying performance assured) +10% (Paper feeding performance assured) -15% · Frequency Fluctuation: 50/60 Hz ±0.3%
G-11
1170SBG0500A
5
HANDLING OF THE CONSUMABLES
Before using any consumable, always read the label on the container carefully. · Use the right toner. The applicable copier model name is indicated on the toner bottle. · Paper is easily damaged by dampness. To prevent absorption of moisture, store paper, which has been removed from its wrapper but not loaded into the drawer, in a sealed plastic bag in a cool, dark place. · Keep consumables out of the reach of children. · Do not touch the PC Drum with bare hands. · Store the paper, toner, and other consumables in a place free from direct sunlight and away from any heating apparatus. · The same sized paper is of two kinds, short grain and long grain. Short grain paper should only be fed through the copier crosswise, long grain paper should only be fed lengthwise. · If your hands become soiled with toner, wash them with soap and water immediately. · Do not throw away any used consumables (PC Drum, starter, toner, etc.). They are to be collected.
NOTE Do not burn, bury in the ground, or throw into the water any consumables (PC Drum, starter, toner, etc.).
1170SBG0600A
6
OTHER PRECAUTIONS
The Print Head Unit of this copier uses a laser diode that emits a laser beam. Use the following precautions when performing service jobs at the users' premises. · When a service job needs to be performed in the laser beam path, such as when working around the Print Head Unit and PC Drum, be sure first to turn the copier OFF. · If the job requires that the power cord be left plugged in, observe the following precautions 1. Take off your watch, ring, and any other reflective object and wear laser protective goggles. 2. At the job site, select a place that is as far as possible away from the users and that is enclosed by walls. 3. Do not bring a highly reflective tool into the laser beam path during the service job.
G-12
1170SBG0700A
7
SYSTEM OPTIONS
12 1 2
1166O014AA
1166O008AA
5
1166O120AA
3
11
1145M035AA
1166O015AA 1171G001AA
7,8 4
1166O121AA 1166O009AA
10
6
4608D018AA 1166O012AA
9
1166O010AB
1166O011AA
1. 2. 3. 4. 5. 6.
Duplexing Document Feeder (AFR-14) Automatic Document Feeder (AF-6) Plug-In Counter Printer Controller (Pi3500) Duplex Unit (AD-10) Large Capacity Cabinet (PF-106)
7. Paper Feed Unit (PF-108) 8. Paper Feed Unit (PF-110) 9. Shift Tray (OT-100) 10. Job Tray (JS-200) 11. Mailbin Finisher (FN-500) 12. Finisher (FN-100)
G-13
D 2500iD
MECHANICAL/ ELECTRICAL
CONTENTS
1. 2. 3. 4. 5. 6. 7. CROSS-SECTIONAL VIEW ............................................................................ M-1 COPYING PROCESS ...................................................................................... M-2 DRIVE SYSTEM .............................................................................................. M-4 OPERATING SEQUENCE .............................................................................. M-5 CPU OVERRUN MONITOR FUNCTION ......................................................... M-8 IMAGE STABILIZATION SYSTEM .................................................................. M-9 IMAGING CARTRIDGE (I/C) ........................................................................... M-10 7-1. I/C Drive Mechanism ............................................................................... M-11 7-2. Identification and Life of I/C ..................................................................... M-11 PC DRUM ........................................................................................................ M-12 DRUM CHARGING .......................................................................................... M-13 ERASE LAMP .................................................................................................. M-14 IR SECTION .................................................................................................... M-15 11-1. Exposure Section: Construction and Function ....................................... M-16 11-2. Image Processing Flow .......................................................................... M-17 11-3. Original Size Detection ........................................................................... M-18 11-4. Original Size Detection Timing ............................................................... M-20 11-5. Scanner and 2nd/3rd Mirrors Carriage Moving Mechanism ................... M-21 PH SECTION ................................................................................................... M-22 12-1. PH Components ..................................................................................... M-23 12-2. Laser Emission Timing (SOS Signal) ..................................................... M-24 DEVELOPING UNIT ........................................................................................ M-25 13-1. Sleeve/Magnet Roller ............................................................................. M-26 13-2. Developing Bias ...................................................................................... M-27 13-3. ATDC Sensor ......................................................................................... M-28 13-4. Sub Hopper Toner Replenishing Mechanism ......................................... M-29 13-5. Sub Hopper Toner Empty Detecting Mechanism ................................... M-30 13-6. Main Hopper Toner Replenishing Mechanism ....................................... M-31 13-7. I/C Cooling Fan Motor ............................................................................ M-32 13-8. Ozone Fan Motor .................................................................................... M-32 PAPER TAKE-UP/FEED SECTION ................................................................ M-33 14-1. MP Cassette Paper Lifting Plate ............................................................. M-33 14-2. MP Cassette-in-Position Detection ......................................................... M-34 14-3. MP Cassette Paper Empty Detection ..................................................... M-35 14-4. MP Cassette Paper Size Detection ........................................................ M-36 14-5. Paper Take-Up Mechanism .................................................................... M-37 14-6. Manual Bypass Tray ............................................................................... M-37 14-7. Paper Take-Up Retry Mechanism .......................................................... M-38 SYNCHRONIZING ROLLERS ......................................................................... M-39 15-1. Synchronizing Roller Drive Mechanism/Control ..................................... M-39 15-2. Paper Dust Remover .............................................................................. M-40 IMAGE TRANSFER AND PAPER SEPARATION ........................................... M-41 PC DRUM PAPER SEPARATOR FINGERS ................................................... M-42 PC DRUM CLEANING ..................................................................................... M-43
8. 9. 10. 11.
12.
13.
14.
15.
16. 17. 18.
i
19. FUSING UNIT .................................................................................................. M-44 19-1. Drive Mechanism .................................................................................... M-45 19-2. Fusing Rollers Pressure Mechanism ...................................................... M-45 19-3. Fusing Temperature Control ................................................................... M-46 19-4. CPM Control ........................................................................................... M-47 20. PAPER EXIT UNIT .......................................................................................... M-48 21. FUSING COOLING FAN MOTOR ................................................................... M-49 22. POWER UNIT COOLING FAN MOTOR .......................................................... M-50
ii
1170SBM0100A
1
CROSS-SECTIONAL VIEW
1 2 3 4 5 6 7 8 9
10
23 11 12 13 14 15 16 17 18 19
22 1. 2nd Mirror 2. 3rd Mirror 3. Exposure Lamp 4. 1st Mirror 5. Lens 6. CCD Unit 7. Paper Exit Roller 8. Fusing Roller Thermostat (TS1) 9. Fusing Roller Heater Lamp (H1) 10. Paper Exit Sensor (PC3) 11. Right Fusing Roller 12. Left Fusing Roller
21
20
1171M037AB
13. Fusing Cooling Fan Motor (M3) 14. Image Transfer Roller 15. Synchronizing Roller 16. Synchronizing Roller Sensor (PC2) 17. Manual Feed Paper Take-Up Sensor (PC8) 18. Manual Feed Paper Take-Up Roll 19. Vertical Transport Roller 20. Paper Separator Pad 21. Paper Take-Up Roll 22. Imaging Cartridge (I/C) 23. PH Unit
M-1
1170SBM0200A
2
COPYING PROCESS
14. Paper Exit 13. Fusing
3. Photoelectric Conversion Section 12. Erase 4. HGB Board 2. Drum Charging
11. Cleaning
10. Paper Separation 5. MFB Board 6. Laser Exposure 1. PC Drum 9. Image Transfer 7. Development 8. Paper Feed 8. Paper Feed
1. PC Drum · The drum is an aluminum cylinder coated with photosensitive material on which an electrostatic latent image is produced. 2. Drum Charging · A scorotron charger employing a comb electrode generates a negative DC charged layer on the surface of the PC Drum. 3. Photoelectric Conversion Section · The Exposure Lamp directs light onto the original. The light reflected off the original is directed and resized by the mirrors and lens so as to produce a reduced-size image on the CCD Sensor. 4. HGB Board · Converts an electric signal into a corresponding 8-bit digital image signal (A/D conversion), makes various corrections, and outputs the results to the MFB Board. 5. MFB Board · Compresses the image data received from the HGB Board, stores it, and uncompresses it. 6. Laser Exposure · The laser beam emitted from the LD (laser diode) strikes the surface of the PC Drum, creating an electrostatic latent image. 7. Development · Negatively charged toner adheres to the latent image on the PC Drum surface, creating a visible image. 8. Paper Feed · Feeds sheets of paper from the appropriate paper source. 9. Image Transfer · An Image Transfer Roller is used. A positive charge applied to the roller causes the visible image on the surface of the PC Drum to transfer onto the front side of the paper.
M-2
10. Paper Separation · The PC Drum Separator Fingers remove paper from the surface of the PC Drum. 11. Cleaning · The Cleaning Blade scrapes residual toner off the surface of the PC Drum and the toner is recycled back to the Developing Unit. 12. Erase · The PC Drum is exposed to light, which effectively removes any residual charge from the drum surface. 13. Fusing · Heat and pressure applied by the Right and Left Fusing Rollers fuse toner on the paper. 14. Paper Exit · Feeds paper out of the copier.
M-3
1170SBM0300A
3
DRIVE SYSTEM
A
B
C
1171M024AB
A. Scanner Motor (M5) Drives the Scanner and 2nd/3rd Mirrors Carriage. B. I/C Motor (M1) Drives the I/C Unit. C. Main Motor (M2) Drives the Paper Take-Up Roll, Manual Feed Paper Take-Up Roll, Synchronizing Roller, Image Transfer Roller, and Fusing Unit.
M-4
1170SBM0400A
4
OPERATING SEQUENCE
A The power cord is plugged into the power outlet.
ON The Power Supply Unit outputs DC24V for the Dehumidifying Heater (option).
B The Power Switch is turned ON.
ON ON DC voltage output Control panel display ON Approx. 560 msec. Fusing Roller Heater Lamp
C
The warming-up cycle is completed.
Main Motor Approx. 20 sec. OFF Predrive stops Power Unit Cooling Fan Motor turns at half speed.
ON
ON
Power Unit Cooling Fan Motor turns at full speed. Developing bias (DC) ON Approx. 100 msec. ON I/C Motor
Image transfer output: - voltage ON Approx. 700 msec. Image transfer output: + voltage ON Approx. 400 msec.
ON Approx. 400 msec.
Image transfer output: - voltage
Image transfer output: + voltage
ON Approx. 400 msec.
Image transfer output: - voltage
T/C ratio is checked for abnormality for approx. 28 sec.
Normal T/C Abnormal T/C: approx. 31 sec. OFF I/C Motor Approx. 400 msec. OFF Image transfer output Approx. 15 min. OFF Developing bias (DC)
M-5
D
The Start key is pressed.
Polygon Motor Fusing Cooling Fan Motor ON Approx. 6 sec. Laser ON Developing bias (DC) ON Approx. 100 msec. Image transfer output: - voltage
ON ON
Approx. 1.1 sec.
ON
Image transfer current value for non-printing timing between sheets of paper
ON Approx. 140 msec. ON
I/C Motor Main Motor The Power Unit Cooling Fan Motor turns at full speed. The Ozone Fan Motor turns at full speed.
ON Approx. 700 msec.
Paper Take-Up Solenoid
E
The Synchronizing Roller Sensor is activated.
OFF Approx. 110 msec. Paper Take-Up Solenoid
VSYNC signal ON: approx. 50 msec. later
ON ON ON
Paper Take-Up Solenoid Synchronizing Clutch Developing bias (AC) ON Approx. 160 msec.
Approx. OFF 90 msec.
Paper Take-Up Solenoid
Image transfer current value for printing
F
The Synchronizing Roller Sensor is deactivated.
OFF Approx. 130 msec. OFF Approx. 170 msec. ON Approx. 320 msec. Synchronizing Clutch Developing bias (AC) Image transfer output: - voltage
OFF Approx. 650 msec.
I/C Motor Approx. 15 min. OFF Developing bias (DC)
OFF
Laser
M-6
G
The Paper Exit Sensor is deactivated.
OFF Approx. 680 msec. OFF Main Motor The Power Unit Cooling Fan Motor turns at half speed. Polygon Motor Approx. 10 sec. Approx. 20 sec. OFF OFF Ozone Fan Motor Fusing Cooling Fan Motor
M-7
1170SBM0500A
5
CPU OVERRUN MONITOR FUNCTION
· CPU Overrun Monitor Function (Watchdog Function) The watchdog function is a self-monitoring function that determines whether any of the CPUs mounted on the control board overrun. · If this function detects that a CPU overruns, the copier automatically resets the CPU, thereby restarting the logic circuit and mechanism. · Even if a copier CPU operates erratically due to electrical noise, therefore, the copier is able to recover from the faulty condition so that the number of visits made by the Tech. Rep. for CPU overrun can be minimized. · Processing performed during watchdog function: If a faulty condition is detected, the copier resets the CPU and performs a restart sequence. Since this sequence of operations is performed even during a copy cycle, the copier detects a sheet or sheets of paper left inside it as a misfeed while it is being restarted.
M-8
1170SBM0600A
6
IMAGE STABILIZATION SYSTEM
· The following image stabilization controls are provided to ensure stabilized copy image. Item PC Drum temperature correction Purpose Control
To compensate for any change The I/C Thermistor is used to in ID due to changing PC Drum detect temperature and, temperatures. according to the detected temperature, Vg/Vb is corrected. To compensate for degraded Corrects Vg according to the sensitivity caused by a deterio- period of time during which the rating PC Drum. PC Drum has turned.
PC Drum deterioration correction
PC Drum Charge Corona
I/C Thermistor (TH2)
PC Drum
Grid Voltage: (Vg) PC Drum Revolution Counter
Sleeve/ Magnet Roller
Developing Bias: (Vb)
CPU
1171M028AA
M-9
1170SBM0700A
7
IMAGING CARTRIDGE (I/C)
· This copier employs an Imaging Cartridge ("I/C" in this manual) that contains a PC Drum, PC Drum Charge Corona, Developing Unit, and Cleaning Unit as one unit.
1171M002AA
1171M001AA
Toner Supply Port
1171M003AA
ATDC Sensor (E1)
M-10
1170SBM0701A
7-1.
I/C Drive Mechanism
· Drive from the I/C Motor is transmitted via a gear train to the PC Drum and Hopper.
PC Drum Drive Gear
I/C Motor (M1)
Hopper Drive Gear
1171M004AA
Electrical Component M1
1170SBM0702A
Control Signal PJ16A-3
ON L
OFF H
7-2.
Identification and Life of I/C
· When the Start key is pressed or the Side Cover is opened and closed, the copier determines whether the I/C is new or one which has been used previously. · The copier monitors the I/C life by storing in memory the period of time during which the PC Drum has turned. The data is cleared when a new I/C is installed in the copier.
M-11
1170SBM0800A
8
PC DRUM
· The PC Drum used in this copier is the organic photoconductor (OPC) type. The drum consists of an aluminum base coated with a charge generation layer and a charge transport layer. Handling Precautions Prolonged exposure to light can cause the photoconductor surface of the drum to suffer light fatigue, resulting in a loss of photosensitivity. If the I/C is removed from the copier, it should be wrapped in a soft, clean, opaque cloth or other protective covering to prevent exposure to light.
PC Drum
PC Drum Cross-Section Charge Transport Layer Charge Generation Layer Aluminum Base
1167M007AA
1139M007AA
Gear · Grounding of the PC Drum The PC Drum ground point is located inside and at the front end of the I/C as viewed from the front of the copier and in constant contact with the Drum Holding Shaft. When the I/C is installed in the copier, the Drum Holding Shaft contacts the ground point. This provides for assured grounding of the PC Drum through the ground plate in the rear to the frame of the copier. Ground Point PC Drum
Ground Plate
Shaft
1171M005AA
M-12
1170SBM0900A
9
DRUM CHARGING
· A scorotron charger system generates a negative DC corona discharge onto the PC Drum surface. The grid mesh ensures uniform charging. · The grid voltage (Vg) applied to the grid mesh is controlled by the constant voltage circuitry within the High Voltage Unit. It is varied through image stabilization control. · To restrict ozone production, the copier uses a PC Drum Charge Corona with a comb electrode. PC Drum Charge Corona PC Drum
1171M006AB
1171M008AC
Comb Electrode Grid Mesh Electrical Component Drum charging output Control Signal PJ14A-3A ON L OFF H
M-13
1170SBM1000A
10
ERASE LAMP
· Any potential remaining on the surface of the PC Drum is neutralized by both light from the Erase Lamp and a DC negative voltage applied by the Charge Neutralizing Sheet. · The Charge Neutralizing Sheet applies a negative charge on the surface of the PC Drum which is positively charged by the Image Transfer Roller. A voltage of -820V is applied to the Charge Neutralizing Sheet from the High Voltage Unit. The Erase Lamp then illuminates the surface of the PC Drum to further neutralize it. · The Erase Lamp consists of ten tungsten lamps.
Erase Lamp (LA1)
I/C PC Drum
1171M009AD
Cleaning Blade Charge Neutralizing Sheet PC Drum Erase Lamp (LA1)
PC Drum Charge Corona
1171M010AD
Sleeve/Magnet Roller Electrical Component LA1 Control Signal PJ11A-6A All lamps ON H Standby ON L
M-14
1170SBM1100A
11
IR SECTION
· Light reflected from the original passes through three mirrors and a lens to form a reduced image on the CCD Sensor as the Scanner is moved by the Scanner Motor. The CCD sensor converts the light pattern (image data) into an electrical image signal. · The electrical image signal is then output to the MFB Board. 7 8 9 10 11
5 4 3 2 1
6
12
13 20 15 19 18 1. BCR Board (BCR) 2. Original Size Detecting Sensor 5 (UN8) 3. Original Cover Detecting Sensor (PC14) 4. Original Size Detecting Sensor 4 (UN7) 5. Exposure Lamp (LA2) 6. Original Size Detecting Sensor 6 (UN9) 7. Scanner Motor (M5) 8. HGB Board (HGB) 9. Original Size Detecting Sensor 1 (UN4) 10. Original Size Detecting Sensor 2 (UN5) 11. Original Size Detecting Sensor 3 (UN6) 17 16
1167M110AD
14
12. Scanner Home Position Sensor 1 (PC12) 13. Size Reset Switch (S5) 14. CCD Board (CCD) 15. Lens 16. Scanner 17. 1st Mirror 18. Scanner Home Position Sensor 2 (PC13) 19. 2nd/3rd Mirrors Carriage 20. Inverter Board (INV)
M-15
1170SBM1101A
11-1. Exposure Section: Construction and Function
1. Auxiliary Reflector 2. Exposure Lamp
3. 1st Mirror
1167M089AA
1. Auxiliary Reflector When a book or other bound original is copied, the paper in the area near the binding generally fails to come flush against the glass, so that the copy of these areas is generally too dark. The Auxiliary Reflector reduces this problem by reflecting light from the Exposure Lamp onto these areas of the original. 2. Exposure Lamp A fluorescent lamp is used to illuminate the original. 3. 1st Mirror Directs the reflected light from the original to the 2nd Mirror. Electrical Component LA2 Control Signal CN13BCR-1 ON L OFF H
M-16
1170SBM1102A
11-2. Image Processing Flow
· Image processing is made up of the following blocks.
1. Photoelectric Conversion (CCD Sensor)
2. HGB Board Transmitted over an optical cable. 3. MFB Board
4. PH (Laser Emission)
1. Photoelectric Conversion (CCD Sensor) · Light reflected off the original is received through mirrors and lens by the CCD Sensor which, in turn, outputs the corresponding data to the HGB Board. 2. HGB Board · After converting the data received from the CCD to an analog signal, the board converts it to 8-bit image data (A/D conversion). It further makes various corrections and outputs the resultant image data to the MFB Board over an optical cable. 3. MFB Board · This board compresses the image data received from the HGB Board, stores it, and uncompresses it. · The image memory has a standard capacity of 16MB and can be expanded up to 64MB (optional). 4. PH · Emits a laser beam according to the image data provided by the MFB Board to expose the surface of the PC Drum.
M-17
1170SBM1103A
11-3. Original Size Detection
· When the copier is in Auto Paper or Auto Size, the sensors mounted in the IR receive light reflected off the original to allow the copier to determine the original size. Original Size Detecting Sensor 6 (UN9) Original Size Detecting Sensor 4 (UN7) Original Size Detecting Sensor 1 (UN4) Original Size Detecting Sensor 2 (UN5) Original Size Detecting Sensor 3 (UN6)
Original Size Detecting Sensor 5 (UN8)
1171M025AD
Electrical Component UN4 UN5 UN6 UN7 UN8 UN9
Control Signal CN4BCR-4 CN5BCR-7 CN11HGB-4 CN6BCR-4 CN9HGB-1 CN8BCR-4
Blocked L L L L L L
Unblocked H H H H H H
M-18
Original Size 11" × 17" A3L A4L A4C A5L B4L FLS Letter L Letter C Legal r r r r r r r r r r r r r r r r r r r r r UN4 S1 r r r r S2 r r r r r r r UN5 S3 r r S4 r r r UN6 S5 UN7 S6 r r r S7 r r UN8 S8 r r UN9 S9 r r r r r r r r r r
r: Detected by sensor; L: Lengthwise; C: Crosswise
NOTE UN4, UN6 and UN8 are options.
Original Size 11" × 17" A3L A4L A4C B4L 5-1/2" × 8-1/2"L FLS B5C Letter L Letter C Legal r r r r r r r r r r r r r UN5 S2 r r r r r r r r r r r r S3 r r S4 r r r UN6 S5 UN7 S6 r r r S7 r r UN8 S8 r r UN9 S9 r r r r r r r r r r r
r: Detected by sensor; L: Lengthwise; C: Crosswise
NOTE UN6, UN8 and UN9 are options.
M-19
1170SBM1104A
11-4. Original Size Detection Timing
The copier CPU affirms and resets the readings of the original size at the following timings. · Takes size readings: When the Original Cover Detecting Sensor is deactivated. · Affirms size readings: When the Start key is pressed with the Original Cover Detecting Sensor activated or the Size Reset Switch deactuated. · Resets size readings: When the Size Reset Switch is deactuated. Magnet
Original Cover Detecting Sensor (PC14)
Size Reset Switch (S5)
1167M113AB
Electrical Component S5 Electrical Component PC14
Control Signal CN9BCR-2 Control Signal CN10BCR-2
ON L Unblocked L
OFF H Blocked H
M-20
1170SBM1105A
11-5. Scanner and 2nd/3rd Mirrors Carriage Moving Mechanism
· During a scan, the Scanner projects an even amount of light from the Exposure Lamp onto the entire surface of the original. The light is reflected from the original to the 1st Mirror of the scanner and then to the 2nd and 3rd Mirrors. · The Scanner is driven by the Scanner Motor and front and rear Scanner Drive Cables. · Scanner speed is determined by the set zoom ratio in reference to the full size mode. · The Scanner is at home position when Scanner Home Position Sensor 1 is blocked. This position serves as the reference for the scan motion. · Scanner Home Position Sensor 2 determines the home position of the Scanner when AF-7 is used. <2nd/3rd Mirrors Carriage> · The 2nd and 3rd Mirrors are mounted to their holder at right angles to each other. They direct the light reflected off the 1st Mirror through the lens to the CCD. · The 2nd/3rd Mirrors Carriage is also moved by the Scanner Drive Cables and pulleys driven by the Scanner Motor. It travels at a speed half that of the Scanner, thereby keeping constant the optical path length between the Original Glass and lens. Scanner Motor (M5)
Scanner Home Position Sensor 1 (PC12)
Scanner 2nd/3rd Mirrors Carriage Scanner Home Position Sensor 2 (PC13) Forward Rotation
1167M112AA
Electrical Component M5 Electrical Component PC12 PC13
Control Signal CN3BCR-1~3 Control Signal CN11BCR-1 CN12BCR-1
Backward Rotation
Pulse output Blocked L L Unblocked H H
M-21
1170SBM1200A
12
PH SECTION
· Based on the image data output from the MFB Board, the LD (laser diode) is activated and the corresponding light strikes the surface of the PC Drum.
PH Unit
1171M035AB
M-22
1170SBM1201A
12-1. PH Components
4 3 2 5 6
1
7 1. 2. 3. 4. Polygon Motor (M10) Cylindrical Lens SOS Mirror Collimator Lens
1167M023AB
5. Laser Diode Board (PWB-B) 6. SOS Sensor 7. f- Lens
Electrical Component M10
Control Signal PJ8A-3
ON L
OFF H
M-23
1170SBM1202A
12-2. Laser Emission Timing (SOS Signal)
· The signal output from the Master Board triggers the firing of the laser. The laser beam travels to the Polygon Mirror, lens, and SOS Mirror to eventually hit the SOS Sensor, which generates an SOS signal. · The SOS signal determines the laser emission timing for each line in the main scanning direction. Cylindrical Lens Polygon Motor (M10) Collimator Lens Laser Diode Board SOS Mirror (PWB-B) SOS Sensor
Polygon Mirror
f- Lens PC Drum
1167M024AC
PC Drum
SOS Mirror
SOS Sensor
SOS Signal D C B A
1171M038AA
A to B: LD activation B to C: LD OFF C to D: Laser beam exposure area according to the image data
M-24
1170SBM1300A
13
DEVELOPING UNIT
· The Toner Conveying Rollers mix the toner and carrier particles together and carry the toner/carrier mixture up to the Sleeve/Magnet Roller. The magnetic brush formed on the surface of the roller allows the toner to come into contact with the charges on the surface of the PC Drum, thus forming an electrostatic latent image. 1 2 3 4 5 6
14
7
8
9
1171M011AB
13 1. 2. 3. 4. 5. 6. 7.
12
11
10 8. PC Drum 9. Sleeve/Magnet Roller 10. 1st Toner Conveying Roller 11. ATDC Sensor (E1) 12. 2nd Toner Conveying Roller 13. 3rd Toner Conveying Roller 14. Spent Toner Recycling Duct
Spent Toner Recycling Coil PC Drum Charge Corona Spent Toner Feed Roller 2 Cleaning Blade Spent Toner Feed Roller 1 PC Drum Paper Separator Finger PC Drum Protective Shutter
M-25
1170SBM1301A
13-1. Sleeve/Magnet Roller
· This copier employs the MT-HG system with a Sleeve/Magnet Roller having the following magnetic characteristics. · Turning of the sleeve surrounding the Magnet Roller ensures that fresh developer from the Developer Mixing Chamber is always being conveyed to the point of development with respect to the PC Drum. N1 : The point of development with the maximum magnetic flux density which ensures that the carrier is firmly held onto the Sleeve Roller when toner is attracted to the latent image. : The magnetic flux density between these two poles is made low to ensure that the developer remaining on the surface of the Sleeve Roller is smoothly recycled. They also prevent developer from scattering. : The developer brush is formed by this pole and its height is moderated before the brush is regulated by the Doctor Blade. : This pole ensures that the developer is conveyed to the point of development over the wide interval between N3 and N1. : If developer is compacted and clogs at the Doctor Blade and, as a result, part of the surface of the Sleeve/Magnet Roller is not covered with developer, the nearby developer around this pole with a weak magnetic force goes to those uncovered areas. This helps prevent white lines from occurring on the copy. N1 PC Drum
S1, N2
N3 S2a S2b
S2b S2a
S1
Sleeve/ Magnet Roller N3 N2
1171M027AA
1st Toner Conveying Roller
1167M076AB
M-26
1170SBM1302A
13-2. Developing Bias
· The amount of toner attracted onto the surface of the PC Drum is controlled by varying the developing bias voltage. · As the PC Drum deteriorates and its photoconductive layer begins to wear, it becomes more sensitive to the increase in the amount of toner. As a countermeasure against this problem, the developing bias voltage is automatically switched according to the PC Drum temperature, thereby stabilizing the image quality level.
PC Drum
Sleeve/Magnet Roller
1171M012AB
Developing Bias Contact Terminal Electrical Component Vb Control Signal PJ14A-1A ON L OFF H
M-27
1170SBM1303A
13-3. ATDC Sensor
· The ATDC Sensor automatic adjustment is made when a new I/C is installed in the copier. Toner replenishing control is thereafter controlled as detailed in the following. 1. ATDC Sensor Automatic Adjustment · The ATDC Sensor is automatically adjusted when a new I/C is loaded in the copier. During this sequence, the copier reads the sensor output value and sets it as the reference. This reference value is stored in memory and used until the I/C reaches its service life. 2. Toner Replenishing Control · While the I/C Motor is turning, the ATDC Sensor samples T/C and, according to the readings, the copier provides the following controls. T/C Ratio (%) More than 19 14 to 19 13 to 14 12 to 13 10 to 12 7 to 10 Less than 7 Sampling Data (V) Less than 1.41 2.32 to 1.41 2.50 to 2.32 2.68 to 2.50 3.10 to 2.68 3.92 to 3.10 More than 3.92 Control Details Defective ATDC Sensor Toner replenished for 0 msec. Toner replenished for 54 msec. at intervals of approx. 1 sec. Toner replenished for 150 msec. at intervals of approx. 1 sec. Toner replenished for 378 msec. at intervals of approx. 500 msec. Passed onto the T/C recovery mode. Defective ATDC Sensor
V Toner replenishment represents the operation of the Sub Hopper Toner Replenishing Motor. 3. Toner Empty Control (T/C Recovery Mode) · When the control is passed onto the T/C recovery mode, the Sub Hopper Toner Replenishing Motor is energized to replenish the supply of toner into the Developing Unit and, if T/C is recovered to a level of 14% or higher (2.32V or less) within 150 sec., it resets the toner-empty condition.
M-28
1170SBM1304A
13-4. Sub Hopper Toner Replenishing Mechanism
· Toner is replenished from the Sub Hopper to the Developing Unit by turning the Sub Hopper Toner Replenishing Motor for the period of time controlled by the ATDC output voltage (T/C).
Sub Hopper
1171M013AC
Sub Hopper Toner Replenishing Motor (M7) Electrical Component M7 Control Signal PJ11A-8A ON DC24V OFF L
M-29
1170SBM1305A
13-5. Sub Hopper Toner Empty Detecting Mechanism
· A toner-empty condition in the Sub Hopper is detected by the Magnet Lever that moves up and down as the Sub Hopper Toner Agitating Lever turns and actuates and deactuates the Sub Hopper Toner Empty Switch. · While the amount of toner in the Sub Hopper is more than the predetermined amount, the Magnet Lever rests on the toner, keeping the Sub Hopper Toner Empty Switch deactuated even when the Sub Hopper Toner Agitating Lever turns. As toner is consumed, the Magnet Lever lowers to eventually actuate the Sub Hopper Toner Empty Switch, at which timing the copier detects a toner-empty condition in the Sub Hopper.
Magnet Lever
Magnet
Sub Hopper Toner Agitating Lever
1171M021AA
Sub Hopper Toner Empty Switch (S4)
Electrical Component S4
Control Signal PJ11A-7B
ON L
OFF H
M-30
1170SBM1306A
13-6. Main Hopper Toner Replenishing Mechanism
· When a toner-empty condition in the Sub Hopper is detected, the Main Hopper Toner Replenishing Motor is energized to turn the Toner Bottle, thereby supplying toner from the Main Hopper to the Sub Hopper. · The Toner Bottle Home Position Sensor mounted on the coupling ensures that the Toner Supply Port in the Toner Bottle is positioned at the top whenever the bottle is stopped. · The Toner Bottle Cover Sensor detects whether the Toner Bottle Cover is open. If the cover is open, the copier does not authorize the initiation of a new copy cycle. If the cover is opened during a copy cycle, the copier interrupts the cycle. Toner Bottle
Main Hopper Toner Replenishing Motor (M6)
Sub Hopper Toner Bottle Home Position Sensor (PC10)
1171M020AB
Electrical Component M6 Electrical Component PC10
Control Signal PJ11A-4A Control Signal PJ11A-2B
ON DC24V Unblocked L
OFF L Blocked H
M-31
1170SBM1307A
13-7. I/C Cooling Fan Motor
· The I/C Cooling Fan Motor prevents the temperature inside the copier (around the entire I/C) from rising inordinately.
I/C
I/C Cooling Fan Motor (M9) Electrical Component M9
1170SBM1308A
1171M032AB
Control Signal PJ18A-10
ON DC24V
OFF L
13-8. Ozone Fan Motor
· Ozone produced by the PC Drum Charge Corona is absorbed by the Ozone Filter from the air being drawn out of the copier by the Ozone Fan Motor. Ozone Fan Motor (M8)
I/C
Ozone Filter
1171M023AC
Electrical Component M8
Control Signal PJ11A-1A
ON DC24V
OFF L
M-32
1170SBM1400A
14
PAPER TAKE-UP/FEED SECTION
NOTE · For the details of the 2nd Cassette (500-Sheet Cassette), see the relevant option service manual.
· This copier employs the Multi-Purpose (MP) Cassette whose capacity is about 250 sheets (about 20 sheets for special paper). Paper Size Detecting Board (PWB-I)
Paper Take-Up Roll
Trailing Edge Stop
1170SBM1401A
1167M055AA
14-1. MP Cassette Paper Lifting Plate
· The Paper Lifting Plate installed in the MP Cassette is spring-loaded to push the paper stack upward. When the cassette is slid into the copier, the lever located on the bottom of the cassette and used to lock down the Paper Lifting Plate is pushed and unlocked, allowing the Paper Lifting Plate to push the paper stack upward.
Lever Paper Lifting Plate
1167M080AA
M-33
1170SBM1402A
14-2. MP Cassette-in-Position Detection
· When the MP Cassette is slid into the copier, the light blocking plate located in the rear of the cassette blocks the Cassette Set Sensor and the copier determines that the MP Cassette has been slid into position.
Cassette Set Sensor (PC6) Light Blocking Plate
1167M052AB
Electrical Component PC6
Control Signal PJ13A-5B
Unblocked H
Blocked L
M-34
1170SBM1403A
14-3. MP Cassette Paper Empty Detection
· Two sensors are used in this copier: the Paper Empty Sensor detects a paper-empty condition, while the Paper Near-Empty Sensor detects a paper near-empty condition. Paper Near-Empty Detection: · A paper near-empty condition is detected as the paper is consumed and when the NearEmpty Lever lowers to eventually block the sensor (L). · At this time, the MP Cassette Paper Empty LED starts blinking. · A paper-empty condition results when about 50 more sheets of paper are used after the near-empty condition has been detected. Near-Empty Lever
Paper Lifting Lever Paper Near-Empty Sensor (PC4)
1167M071AC
Paper Empty Detection: · A paper-empty condition is detected as the paper is consumed and when the Empty Lever lowers to eventually block the sensor (L). · At this time, the MP Cassette Paper Empty LED lights up steadily. Paper Empty Sensor (PC5)
Empty Lever Electrical Component PC4 PC5 Control Signal PJ14A-13A PJ13A-2B
1167M073AD
Unblocked H H
Blocked L L
M-35
1170SBM1404A
14-4. MP Cassette Paper Size Detection
· The Paper Size Detecting Board detects the length of the paper (FD). · A lever is connected to the Trailing Edge Stop of the cassette and, as the stop is slid to the size of the paper loaded in the cassette, the lever is moved to turn ON and OFF the size detecting switches mounted on the copier side. · The control panel settings are necessary for any paper size other than the following. Paper Size Detecting Switches (PWB-I) 1 ON OFF OFF ON ON ON OFF ON 2 OFF OFF ON ON ON OFF ON ON 3 OFF OFF ON ON OFF OFF OFF ON 4 OFF OFF ON ON OFF ON OFF OFF Paper Size A3L, 11"×17"L B4L, 8-1/2"×14"L A4L B5L, 8-1/2"×11"L A4C/A5L B5C A5C 8-1/2"×11"C
Paper Size Detecting Board (PWB-I) 1 2 3 4
Trailing Edge Stop Electrical Component PWB-I (1) PWB-I (2) PWB-I (3) PWB-I (4) Control Signal PJ14A-1B PJ14A-2B PJ14A-3B PJ14A-4B ON L L L L
1167M060AC
OFF H H H H
M-36
1170SBM1405A
14-5. Paper Take-Up Mechanism
· Drive from the Main Motor is transmitted to the Paper Take-Up Clutch (spring clutch) and, by energizing the Paper Take-Up Solenoid, the Paper Take-Up Roll is turned. · The paper separating mechanism employs a Paper Separator Pad. Main Motor (M2)
Paper Take-Up Clutch
Paper Take-Up Roll Paper Separator Pad
Paper Take-Up Solenoid (SL1)
1167M038AB 1170SBM1406A
1167M054AB
14-6. Manual Bypass Tray
1. Construction of the Manual Bypass Tray · Drive from the Main Motor is transmitted to the Manual Paper Feed Take-Up Clutch and, by energizing this clutch, the Manual Feed Paper Take-Up Roll is turned. Main Motor (M2) Manual Paper Feed Take-Up Clutch (CL3) Manual Feed Paper Take-Up Roll
Manual Feed Paper Take-Up Sensor (PC8)
Manual Bypass Tray
1167M067AC
Electrical Component M2 SL1 CL3
Control Signal PJ16A-1 PJ13A-13B PJ4A-9A
ON L L L
OFF H H H
M-37
2. Manual Feed Paper Take-Up Detection · The Manual Feed Paper Take-Up Sensor detects a sheet of paper that is fed via the Manual Bypass Tray. · The size and type of the paper for manual feed are set on the control panel. Manual Feed Paper Take-Up Sensor (PC8)
1167M086AA
1167M085AA
Electrical Component PC8
1170SBM1407A
Control Signal PJ4A-7B
Unblocked H
Blocked L
14-7. Paper Take-Up Retry Mechanism
· To minimize the occurrence of a paper misfeed due to a slippery Paper Take-Up Roll, the Paper Take-Up Solenoid is energized a second time if a sheet of paper fails to reach the Synchronizing Roller Sensor within a given period of time after the solenoid has been energized first. · A paper take-up misfeed results if the sheet of paper does not reach the Synchronizing Roller Sensor even after two paper take-up sequences.
M-38
1170SBM1500A
15
SYNCHRONIZING ROLLERS
· The Synchronizing Rollers of this copier are located inside the Right Door. They are easily accessible for misfeed clearing by just opening the Right Door.
Synchronizing Roller
1171M029AA
1170SBM1501A
15-1. Synchronizing Roller Drive Mechanism/Control
· The Synchronizing Rollers are turned by the drive from the Main Motor transmitted to the Synchronizing Clutch. · The rollers are started when the Synchronizing Clutch is deenergized. Main Motor (M2) Synchronizing Clutch (CL1)
Left Synchronizing Roller
Right Synchronizing Roller
1167M064AA
Electrical Component M2 CL1
Control Signal PJ16A-1 PJ13A-2A
ON L L
OFF H H
M-39
1170SBM1502A
15-2. Paper Dust Remover
· The P