Konica Minolta bizhub C35 Service Manual
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Konica Minolta bizhub C35 Service Manual

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DRAFT
SERVICE MANUAL
THEORY OF OPERATION
2010.02
2010.02
Ver. 1.0
Ver. 1.0

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Summary of Contents for Konica Minolta bizhub C35

  • Page 1 DRAFT SERVICE MANUAL THEORY OF OPERATION 2010.02 2010.02 Ver. 1.0 Ver. 1.0...

  • Page 2: Table Of Contents

    INDICATION OF WARNING ON THE MACHINE .............S-19 MEASURES TO TAKE IN CASE OF AN ACCIDENT ............S-22 Composition of the service manual ................. C-1 Notation of the service manual ..................C-2 bizhub C35 main body OUTLINE ........................1 COMPOSITION/OPERATION..................9 Lower Feeder Unit OUTLINE ........................
  • Page 3 DRAFT Blank Page...

  • Page 4: Safety And Important Warning Items

    Because of possible hazards to an inexperienced person servicing this product as well as the risk of damage to the product, Konica Minolta Business Technologies, INC. (hereafter called the KMBT) strongly recommends that all servicing be performed only by KMBT- trained service technicians.

  • Page 5: Safety Warnings

    [1] MODIFICATIONS NOT AUTHORIZED BY KONICA MINOLTA BUSINESS TECHNOLOGIES, INC. Konica Minolta brand products are renowned for their high reliability. This reliability is achieved through high-quality design and a solid service network. Product design is a highly complicated and delicate process where numerous mechanical, physical, and electrical aspects have to be taken into consideration, with the aim of arriving at proper tolerances and safety factors.
  • Page 6 DRAFT SAFETY AND IMPORTANT WARNING ITEMS [2] POWER PLUG SELECTION In some countries or areas, the power plug provided with the product may not fit wall outlet used in the area. In that case, it is obligation of customer engineer (hereafter called the CE) to attach appropriate power plug or power cord set in order to connect the product to the supply.

  • Page 7: Connection To Power Supply

    SAFETY AND IMPORTANT WARNING ITEMS [3] CHECKPOINTS WHEN PERFORMING ON-SITE SERVICE Konica Minolta brand products are extensively tested before shipping, to ensure that all applicable safety standards are met, in order to protect the customer and CE from the risk of injury.
  • Page 8 DRAFT SAFETY AND IMPORTANT WARNING ITEMS Connection to Power Supply WARNING • Check whether the product is grounded properly. If current leakage occurs in an ungrounded product, you may suffer electric shock while operating the product. Connect power plug to grounded wall outlet. Power Plug and Cord WARNING •...
  • Page 9 DRAFT SAFETY AND IMPORTANT WARNING ITEMS Power Plug and Cord WARNING • Check whether dust is collected around the power plug and wall outlet. Using the power plug and wall outlet without removing dust may result in fire. • Do not insert the power plug into the wall outlet with a wet hand.
  • Page 10 DRAFT SAFETY AND IMPORTANT WARNING ITEMS Installation Requirements Prohibited Installation Places WARNING • Do not place the product near flammable materials or vola- tile materials that may catch fire. A risk of fire exists. • Do not place the product in a place exposed to water such as rain.
  • Page 11 DRAFT SAFETY AND IMPORTANT WARNING ITEMS Servicing Inspection before Servicing CAUTION • Before conducting an inspection, read all relevant docu- mentation (service manual, technical notices, etc.) and proceed with the inspection following the prescribed pro- cedure in safety clothes, using only the prescribed tools. Do not make any adjustment not described in the docu- mentation.
  • Page 12 DRAFT SAFETY AND IMPORTANT WARNING ITEMS Safety Checkpoints WARNING • When taking a report of problems from a user, check each part and repair properly. A risk of product trouble, injury, and fire exists. • Check the exterior and frame for edges, burrs, and other damages.
  • Page 13 DRAFT SAFETY AND IMPORTANT WARNING ITEMS Safety Checkpoints WARNING • Do not remove the cover of the write unit. Do not supply power with the write unit shifted from the specified mount- ing position. The laser light can enter your eye, leading to a risk of loss of eyesight.

  • Page 14: Handling Of Consumables

    DRAFT SAFETY AND IMPORTANT WARNING ITEMS Handling of Consumables WARNING • Toner and developer are not harmful substances, but care must be taken not to breathe excessive amounts or let the substances come into contact with eyes, etc. It may be stimulative.
  • Page 15 DRAFT SAFETY AND IMPORTANT WARNING ITEMS Used Batteries Precautions Handling of batteries CAUTION • 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. •...

  • Page 16: Internal Laser Radiation

    DRAFT SAFETY AND IMPORTANT WARNING ITEMS [4] LASER SAFETY • This is a digital machine certified as a Class 1 laser product. There is no possibility of danger from a laser, provided the machine is serviced according to the instruction in this manual.
  • Page 17 DRAFT SAFETY AND IMPORTANT WARNING ITEMS U.S.A., Canada (CDRH Regulation) • This machine is certified as a Class 1 Laser product under Radiation Performance Stan- dard according to the Food, Drug and Cosmetic Act of 1990. Compliance is mandatory for Laser products marketed in the United States and is reported to the Center for Devices and Radiological Health (CDRH) of the U.S.
  • Page 18 DRAFT SAFETY AND IMPORTANT WARNING ITEMS Finland, Sweden LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT VAROITUS! • Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saat- taa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle laser- säteilylle. puolijohdelaser Laserdiodin suurin teho 15 mW aallonpituus 770 - 800 nm VARNING!

  • Page 19: Laser Safety Label

    DRAFT SAFETY AND IMPORTANT WARNING ITEMS Laser Safety Label • A laser safety label is attached to the inside of the machine as shown below. A121P0E505DA S-16...

  • Page 20: Laser Caution Label

    DRAFT SAFETY AND IMPORTANT WARNING ITEMS Laser Caution Label • A laser caution label is attached to the outside of the machine as shown below. A121P0C501DA PRECAUTIONS FOR HANDLING THE LASER EQUIPMENT • When laser protective goggles are to be used, select ones with a lens conforming to the above specifications.

  • Page 21: Safety Information

    DRAFT SAFETY INFORMATION SAFETY INFORMATION IMPORTANT NOTICE The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Admin- istration implemented regulations for laser products manufactured since August 1, 1976. Compliance is mandatory for products marketed in the United States. This copier is certified as a "Class 1"...

  • Page 22: Indication Of Warning On The Machine

    DRAFT SAFETY INFORMATION INDICATION OF WARNING ON THE MACHINE Caution labels shown below are attached in some areas on/in the machine. When accessing these areas for maintenance, repair, or adjustment, special care should be taken to avoid burns and electric shock. CAUTION •...
  • Page 23 DRAFT SAFETY INFORMATION High voltage • This area generates high voltage. Be careful not to touch here when the power is turned ON to avoid getting an electric shock. Electric hazard • To avoid electrical shock, after turning OFF the power switch, do not touch the DC power supply for 9 minutes.
  • Page 24 DRAFT SAFETY INFORMATION WARNING • Do not burn used Imaging Unit. Toner expelled from the fire is dangerous. WARNING • Do not burn used Waste Toner Bottle. Toner expelled from the fire is dangerous. WARNING • Do not burn used Toner Cartridges. Toner expelled from the fire is dangerous.

  • Page 25: Measures To Take In Case Of An Accident

    DRAFT MEASURES TO TAKE IN CASE OF AN ACCIDENT MEASURES TO TAKE IN CASE OF AN ACCIDENT 1. If an accident has occurred, the distributor who has been notified first must immediately take emergency measures to provide relief to affected persons and to prevent further damage.

  • Page 26: Composition Of The Service Manual

    DRAFT Composition of the service manual This service manual consists of Theory of Operation section and Field Service section to explain the main machine and its corresponding options. Theory of Operation section gives, as information for the CE to get a full understanding of the product, a rough outline of the object and role of each function, the relationship between the electrical system and the mechanical system, and the timing of operation of each part.

  • Page 27: Notation Of The Service Manual

    DRAFT Notation of the service manual A. Product name In this manual, each of the products is described as follows: (1) bizhub C35 Main body (2) Microsoft Windows NT 4.0: Windows NT 4.0 or Windows NT Microsoft Windows 2000: Windows 2000...

  • Page 28: Main Body

    DRAFT SERVICE MANUAL THEORY OF OPERATION Main body 2010.02 Ver. 1.0...

  • Page 29: Revision History

    DRAFT Revision history After publication of this service manual, the parts and mechanism may be subject to change for improvement of their performance. Therefore, the descriptions given in this service manual may not coincide with the actual machine. When any change has been made to the descriptions in the service manual, a revised version will be issued with a revision mark added as required.
  • Page 30 DRAFT Theory of operation Ver. 1.0 Feb. 2010 CONTENTS bizhub C35 main body OUTLINE SYSTEM CONFIGURATION................... 1 PRODUCT SPECIFICATIONS ................2 Fax specifications ....................5 SECTION CONFIGURATION.................. 6 MEDIA PATH ......................7 COMPOSITION/OPERATION OVERALL COMPOSITION ..................9 Control block diagram ................... 9 Image creation process ..................
  • Page 31 DRAFT Theory of operation Ver. 1.0 Feb. 2010 9.3.3 Toner replenishing control................25 9.3.4 Toner cartridge detection ................26 9.3.5 Toner consumption rate detection............... 27 9.3.6 Toner life detection..................27 9.3.7 Toner near-empty condition detection............27 9.3.8 Toner empty condition detection ..............27 9.3.9 Monochrome prints ..................
  • Page 32 DRAFT Theory of operation Ver. 1.0 Feb. 2010 14.3.3 Transfer belt cleaning mechanism............... 44 14.3.4 1st transfer belt backward rotation control ..........45 14.3.5 Toner collecting port shutter mechanism ............ 45 TRANSFER SECTION (2nd transfer) ..............46 15.1 Composition......................46 15.2 Drive ........................
  • Page 33 DRAFT Theory of operation Ver. 1.0 Feb. 2010 18.3.6 Media misfeed detection control ..............64 CONVEYANCE SECTION (IDC sensor)............... 65 19.1 Composition ....................... 65 19.1.1 Drive ......................66 19.2 Operation......................66 19.2.1 Toner density detection control ..............66 19.2.2 IDC sensor calibration control..............67 19.2.3 IDC sensor cover open/close mechanism ..........
  • Page 34 DRAFT Theory of operation Ver. 1.0 Feb. 2010 23.3.2 Media full detection ..................90 IMAGE STABILIZATION CONTROL..............91 24.1 Outline ........................ 91 24.2 Operation sequence ................... 92 24.2.1 Simplified correction control ................ 92 24.2.2 Complete correction control ................ 93 24.2.3 Individual registration control ..............
  • Page 35 DRAFT Theory of operation Ver. 1.0 Feb. 2010 Blank Page...

  • Page 36: Outline

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 1. SYSTEM CONFIGURATION OUTLINE SYSTEM CONFIGURATION A0VDT2C544AA bizhub C35 PF-P08 (Lower feeder unit) DK-P01 (Desk)* *: To be locally procured for North America/Europe.

  • Page 37: Product Specifications

    DRAFT 2. PRODUCT SPECIFICATIONS Theory of operation Ver. 1.0 Feb. 2010 PRODUCT SPECIFICATIONS A. Type Type Desktop tandem full-color A4 laser beam printer Printing system Semiconductor laser and electrostatic image transfer to plain paper Exposure system 4 laser diode and 1 polygon mirror PC drum type OPC (organic photo conductor) Photoconductor...
  • Page 38 DRAFT Theory of operation Ver. 1.0 Feb. 2010 2. PRODUCT SPECIFICATIONS C. Media Paper source (maximum tray capacity) Type Tray 1 Tray 2 Plain paper 100 sheets 250 sheets (60 to 90 g/m ; 16 to 24 lb) Thick 1 (91 to 150 g/m Thick 2 (151 to 210 g/m Label Media type...
  • Page 39 DRAFT 2. PRODUCT SPECIFICATIONS Theory of operation Ver. 1.0 Feb. 2010 G. Print functions Type Built-in printer controller 1.5 GB 120 GB (shared with the main body) Interface USB 2.0 (High Speed) compliant, 10Base-T/100Base-TX/1000Base-T Ethernet 30 pages/min. (A4S, 1-sided print, plain paper) 31.6 pages/min.

  • Page 40: Fax Specifications

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 2. PRODUCT SPECIFICATIONS Fax specifications Standard (203 dpi x 98 dpi) Resolution Fine (203 dpi x 196 dpi) Super fine (203 dpi x 392 dpi) Standard/Fine/Super fine Halftone level Halftone standard/Halftone fine/Halftone super fine Receive Supported Automatic reduction...

  • Page 41: Section Configuration

    DRAFT 3. SECTION CONFIGURATION Theory of operation Ver. 1.0 Feb. 2010 SECTION CONFIGURATION Auto document feeder Scanner section Fusing section Media exit section Transfer section (2nd transfer) Duplex section Transfer belt Media feed section (Tray 1) Imaging unit section Write section Media feed section (Tray 2) Lower feeder unit...

  • Page 42: Media Path

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 4. MEDIA PATH MEDIA PATH A0VDT1C502AA...
  • Page 43 DRAFT 4. MEDIA PATH Theory of operation Ver. 1.0 Feb. 2010 Blank Page...

  • Page 44: Composition/Operation

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 5. OVERALL COMPOSITION COMPOSITION/OPERATION OVERALL COMPOSITION Control block diagram Lower feeder unit Scanner Operation board Media feed and Print control board conveyance (PRCB) MFP board (MFPB) Process Image processing Fusing Duplex Leser drive board TC/Y TC/M TC/C...

  • Page 45: Image Creation Process

    DRAFT 5. OVERALL COMPOSITION Theory of operation Ver. 1.0 Feb. 2010 Image creation process Transfer belt cleaning Media separation 1st image transfer 2nd image transfer PC drum charging Developing PC drum LD exposure CCD (Photoelectric conversion) Image processing board A0VDT2C592AA •...

  • Page 46: Timing Chart At Main Body Power On

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 5. OVERALL COMPOSITION Timing chart at main body power on Conditions: A4S plain paper A0VDT2E700AA...

  • Page 47: Interface Section

    DRAFT 6. INTERFACE SECTION Theory of operation Ver. 1.0 Feb. 2010 INTERFACE SECTION Composition A0VDT2C550AA Type [1] LINE (telephone line) jack For line connection [2] TEL (telephone) jack For telephone connection [3] USB port For connection between PC and main body [4] 10Base-T/100Base-TX/1000Base-T Ethernet Inter-face port For network [5] USB HOST port...

  • Page 48: Scanner Section

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 7. SCANNER SECTION SCANNER SECTION Composition A0VDT2C605AA Exposure lamp (LA1) Inverter board (INVB) Relay board/3 Scanner motor A0VDT2C603AA...

  • Page 49: Drive

    DRAFT 7. SCANNER SECTION Theory of operation Ver. 1.0 Feb. 2010 Drive A0VDT2C604AA...

  • Page 50: Operation

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 7. SCANNER SECTION Operation 7.3.1 When the power is ON 1. To identify the position of the scanner unit, the scanner unit is moved until the scan- ner home sensor is activated. 2.

  • Page 51: Control When The Start Key Is Pressed

    DRAFT 7. SCANNER SECTION Theory of operation Ver. 1.0 Feb. 2010 7.3.2 Control when the Start key is pressed A. Original scanning mode (1) Original cover mode 1. The scanner unit is moved to the scanner home sensor detection position and then to the home position.

  • Page 52: Write Section

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 8. WRITE SECTION WRITE SECTION Composition A0VDT2C636AA Return mirror/2nd G2 lens Index board Return mirror/1st SOS mirror SOS lens G1 lens A0VDT2C501AA Polygon mirror...

  • Page 53: Operation

    DRAFT 8. WRITE SECTION Theory of operation Ver. 1.0 Feb. 2010 Operation 8.2.1 Overview • Four semiconductor lasers provided, one for each of the four different colors. A single polygon motor is used to make a scan motion. • Each photo conductor is irradiated with a laser light so that an electrostatic latent image is formed on it.

  • Page 54: Laser Emission Timing

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 8. WRITE SECTION 8.2.3 Laser emission timing • When a ready signal is detected after the lapse of a given period of time after the print cycle has been started, a laser ON signal is output from the MFP board. •...

  • Page 55: Main Scan Magnification Adjustment

    DRAFT 8. WRITE SECTION Theory of operation Ver. 1.0 Feb. 2010 8.2.5 Main scan magnification adjustment • Magnification of the main scan direction is adjusted. • The main body is mounted with only one IDC sensor and therefore unable to make the main scan magnification adjustment or calculate the skew amount automatically.

  • Page 56: Toner Supply Section

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 9. TONER SUPPLY SECTION TONER SUPPLY SECTION Composition A0VDT2C606AA Conveyance screw Agitating blade Toner collecting port A0VDT2C503AA...

  • Page 57: Drive

    DRAFT 9. TONER SUPPLY SECTION Theory of operation Ver. 1.0 Feb. 2010 Drive Drive shaft Toner supply screw Developing motor (M1) A0VDT2C504AA...

  • Page 58: Operation

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 9. TONER SUPPLY SECTION Operation 9.3.1 Toner collecting port shutter mechanism • The toner collecting port is provided with a shutter that prevents toner from being spilled out when the toner cartridge is removed from the main body. •...

  • Page 59: Toner Replenishing Mechanism

    DRAFT 9. TONER SUPPLY SECTION Theory of operation Ver. 1.0 Feb. 2010 9.3.2 Toner replenishing mechanism • The developing motor is energized by monitoring the condition of the toner level sensor for each color of toner. Toner is then supplied from the toner cartridge to the imaging unit as necessary.

  • Page 60: Toner Replenishing Control

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 9. TONER SUPPLY SECTION 9.3.3 Toner replenishing control • The toner level sensor is used to detect the amount of toner in the pre-agitation section (imaging unit), so that the main body can determine whether to replenish the toner or not.

  • Page 61: Toner Cartridge Detection

    DRAFT 9. TONER SUPPLY SECTION Theory of operation Ver. 1.0 Feb. 2010 9.3.4 Toner cartridge detection • Different toner cartridge detection methods apply according to the type of toner car- tridge: the in-box toner cartridge shipped with the main body and the replacement toner cartridge.

  • Page 62: Toner Consumption Rate Detection

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 9. TONER SUPPLY SECTION 9.3.5 Toner consumption rate detection • The toner consumption rate is calculated based on the toner supply time (the number of times the toner supply clutch is energized). •...

  • Page 63: Imaging Unit Section (Overall Composition)

    DRAFT 10. IMAGING UNIT SECTION (overall composition) Theory of operation Ver. 1.0 Feb. 2010 10. IMAGING UNIT SECTION (overall composition) 10.1 Composition A0VDT2C610AA Photo conductor Developing roller Waste Toner collecting screw Toner conveyance screw Cleaning blade Agitating screw Charge roller A0VDT2C506AA...

  • Page 64: Operation

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 10. IMAGING UNIT SECTION (overall composition) 10.2 Operation 10.2.1 Imaging unit detection • Different imaging unit detection methods apply according to the type of imaging unit: the in-box imaging unit shipped with the main body and the replacement imaging unit. Control also varies when the life is reached.

  • Page 65: Imaging Unit Section (Photo Conductor)

    DRAFT 11. IMAGING UNIT SECTION (photo conductor) Theory of operation Ver. 1.0 Feb. 2010 11. IMAGING UNIT SECTION (photo conductor) 11.1 Composition Charge transport layer Aluminum base Charge generating layer Direction of A0VDT2C611AA 4138to2505c1 rotation Photo conductor A0VDT2C588AA...

  • Page 66: Drive

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 11. IMAGING UNIT SECTION (photo conductor) 11.2 Drive Color PC drum motor (M4) Main motor (M2) PC drum A0VDT2C589AA 11.3 Operation 11.3.1 Photo conductor drive mechanism • Motors are used for the drive mechanism independently of the developing system to sup- press incorrect color registration and uneven pitch.

  • Page 67: Imaging Unit Section (Charge Corona)

    DRAFT 12. IMAGING UNIT SECTION (charge corona) Theory of operation Ver. 1.0 Feb. 2010 12. IMAGING UNIT SECTION (charge corona) 12.1 Composition Cleaning roller Charge roller A0VDT2C507AA A0VDT2C611AA Cleaning roller Charge roller A0VDT2C512AA 12.2 Drive Color PC drum motor (M4) Main motor (M2) Charge roller/Y Charge roller/M...

  • Page 68: Operation

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 12. IMAGING UNIT SECTION (charge corona) 12.3 Operation 12.3.1 Charge roller • Charge rollers are used for charging the drum. • As compared with the charge wire, the charge roller applies a lower voltage and thus pro- duces a smaller amount of ozone.

  • Page 69: Imaging Unit Section (Developing)

    DRAFT 13. IMAGING UNIT SECTION (developing) Theory of operation Ver. 1.0 Feb. 2010 13. IMAGING UNIT SECTION (developing) 13.1 Composition A0VDT2C611AA Photo conductor Toner conveyance screw Cleaning blade Agitating screw Waste Toner collecting screw Charge roller Toner supply roller A0VDT2C507AA Developing roller...

  • Page 70: Drive

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 13. IMAGING UNIT SECTION (developing) 13.2 Drive Developing motor Toner supply roller Developing roller A0VDT2C513AA...

  • Page 71: Operation

    DRAFT 13. IMAGING UNIT SECTION (developing) Theory of operation Ver. 1.0 Feb. 2010 13.3 Operation 13.3.1 Toner flow 1. Toner stored in the toner cartridge is agitated by the agitating blade and conveyed onto the front side of the toner cartridge by the toner supply screw. 2.
  • Page 72 DRAFT Theory of operation Ver. 1.0 Feb. 2010 13. IMAGING UNIT SECTION (developing) Agitating blade Toner conveyance screw Toner supply screw A0VDT2C514AA 1st transfer roller 1st transfer roller Toner conveyance screw Transfer belt Photo conductor Cleaning blade Agitating screw WasteToner collecting screw Toner supply roller Cleaning roller A0VDT2C523AA...

  • Page 73: Developing System

    DRAFT 13. IMAGING UNIT SECTION (developing) Theory of operation Ver. 1.0 Feb. 2010 13.3.2 Developing system • Two types of developing systems are used, a non-contact developing system and an alternating current application system. 1. A negative charge (supply bias voltage Vr) is applied the supply roller to regulate the amount of toner sticking to the developing roller.

  • Page 74: Cleaning Mechanism

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 13. IMAGING UNIT SECTION (developing) 13.3.3 Cleaning mechanism A. Cleaning operation 1. The cleaning blade is pressed against the surface of the photo conductor to remove toner left off the surface (fixed blade system). 2.

  • Page 75: Transfer Section (1St Transfer)

    DRAFT 14. TRANSFER SECTION (1st transfer) Theory of operation Ver. 1.0 Feb. 2010 14. TRANSFER SECTION (1st transfer) 14.1 Composition A0VDT2C614AA Transfer belt Waste toner collecting screw Retraction lever/Y, M, C Transfer belt drive roller 1st transfer roller/K 1st transfer roller/Y, M, C Cleaning blade Driven roller A0VDT2C516AA...

  • Page 76: Operation

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 14. TRANSFER SECTION (1st transfer) 14.3 Operation 14.3.1 1st transfer output control • To transfer the toner image from the photo conductor to the transfer belt, the transfer volt- age is applied to the 1st transfer roller. •...

  • Page 77: 1St Transfer Roller Pressure/Retraction Control

    DRAFT 14. TRANSFER SECTION (1st transfer) Theory of operation Ver. 1.0 Feb. 2010 14.3.2 1st transfer roller pressure/retraction control • To extend the service life of the photo conductor/Y, M, C, the pressure position of the 1st transfer roller is changed between the monochrome mode and the color mode. The 1st transfer roller/K is not provided with a retraction mechanism;...
  • Page 78 DRAFT Theory of operation Ver. 1.0 Feb. 2010 14. TRANSFER SECTION (1st transfer) B. 1st transfer roller release operation 1. Rotation of the Transport motor is transmitted by a gear train to the pressure/ release clutch. 2. Drive through the pressure/release clutch rotates the pressure cam a half turn, thus pushing the sliding plate.

  • Page 79: Transfer Belt Cleaning Mechanism

    DRAFT 14. TRANSFER SECTION (1st transfer) Theory of operation Ver. 1.0 Feb. 2010 14.3.3 Transfer belt cleaning mechanism • To scrape residual toner off the surface of the transfer belt unit, the transfer belt is pro- vided with a cleaning blade. •...

  • Page 80: 1St Transfer Belt Backward Rotation Control

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 14. TRANSFER SECTION (1st transfer) 14.3.4 1st transfer belt backward rotation control • To prevent media dust, toner, and other foreign matter from being wedged in the cleaning blade while the transfer belt remains stationary, the transfer belt is turned backward so that the foreign matter can be removed.

  • Page 81: Transfer Section (2Nd Transfer)

    DRAFT 15. TRANSFER SECTION (2nd transfer) Theory of operation Ver. 1.0 Feb. 2010 15. TRANSFER SECTION (2nd transfer) 15.1 Composition A0VDT2C618AA Retraction gear 2nd transfer roller Pre-transfer guide plate A0VDT2C528AA...

  • Page 82: Drive

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 15. TRANSFER SECTION (2nd transfer) 15.2 Drive Main motor 2nd transfer roller A0VDT2C529AA 15.3 Operation 15.3.1 2nd transfer roller pressure mechanism • The main body is provided with a mechanism that presses the 2nd transfer roller up against, and retracts it from, the transfer belt.
  • Page 83 DRAFT 15. TRANSFER SECTION (2nd transfer) Theory of operation Ver. 1.0 Feb. 2010 C. Pressure/release operation 1. When the registration clutch and the 2nd transfer release solenoid are energized, the rotation is transmitted to the release cam via a coupling gear. 2.

  • Page 84: 2Nd Transfer Voltage Control

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 15. TRANSFER SECTION (2nd transfer) 15.3.2 2nd transfer voltage control • The transfer voltage is applied to the 2nd transfer roller in order to transfer the toner image from the transfer belt to the media. •...

  • Page 85: Waste Toner Collecting Section

    DRAFT 16. WASTE TONER COLLECTING SECTION Theory of operation Ver. 1.0 Feb. 2010 16. WASTE TONER COLLECTING SECTION 16.1 Composition A0VDT2C619AA Toner collecting screw Waste toner collecting screw (imaging unit) Waste toner collecting screw Waste toner bottle Waste toner agitating blade A0VDT2C560AA...

  • Page 86: Drive

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 16. WASTE TONER COLLECTING SECTION 16.2 Drive Color PC drum motor (M4) Main motor (M2) Waste toner agitating blade A0VDT2C557AA...

  • Page 87: Operation

    DRAFT 16. WASTE TONER COLLECTING SECTION Theory of operation Ver. 1.0 Feb. 2010 16.3 Operation 16.3.1 Toner flow at the imaging unit section 1. Toner scraped off by the cleaning blade in the imaging unit is conveyed to the waste toner discharge port by the toner collecting screw.

  • Page 88: Waste Toner Flow At Transfer Belt Unit Section/2Nd Transfer Section

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 16. WASTE TONER COLLECTING SECTION 16.3.2 Waste toner flow at transfer belt unit section/2nd transfer section 1. Toner scraped off by the cleaning blade provided in the transfer belt unit is collected onto the waste toner discharge port of the transfer belt unit by the toner collecting screw.

  • Page 89: Waste Toner Bottle-In-Position Detection Mechanism

    DRAFT 16. WASTE TONER COLLECTING SECTION Theory of operation Ver. 1.0 Feb. 2010 16.3.4 Waste toner bottle-in-position detection mechanism • The waste toner bottle set detection lever is provided to detect a waste toner bottle loaded in position. • When the waste toner bottle is not loaded, the set detection lever is raised, so that the protrusion provided in the front door interferes with the set detection lever.

  • Page 90: Waste Toner Near-Full Condition Detection Control

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 16. WASTE TONER COLLECTING SECTION 16.3.6 Waste toner near-full condition detection control • A waste toner near-full condition is detected when the waste toner sensor continuously blocks for a predetermined period of time. •...

  • Page 91: Media Feed Section (Tray 1)

    DRAFT 17. MEDIA FEED SECTION (Tray 1) Theory of operation Ver. 1.0 Feb. 2010 17. MEDIA FEED SECTION (Tray 1) 17.1 Composition A0VDT2C624AA Media lift plate Feed roller Separation roller Tray1 media empty sensor A0VDT2C554AA...

  • Page 92: Drive

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 17. MEDIA FEED SECTION (Tray 1) 17.2 Drive Main motor (M2) Feed roller Tray 1 media feed clutch Separation roller A0VDT2C553AA...

  • Page 93: Operation

    DRAFT 17. MEDIA FEED SECTION (Tray 1) Theory of operation Ver. 1.0 Feb. 2010 17.3 Operation 17.3.1 Media lift plate mechanism • The media lift plate will be locked under the media lift plate lock lever by pressing it down (in which the media is loaded in position).

  • Page 94: Media Feed Control

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 17. MEDIA FEED SECTION (Tray 1) 17.3.3 Media feed control • Rotation of the transport motor is transmitted through the media feed clutch to drive the feed roller to take up and feed the media. •...

  • Page 95: Media Feed Section (Tray 2)

    DRAFT 18. Media Feed Section (Tray 2) Theory of operation Ver. 1.0 Feb. 2010 18. Media Feed Section (Tray 2) 18.1 Composition A0VDT2C626AA Tray2 set sensor Trailing edge guide plate Edge guide plate Feed roller Separation roller Tray2 media empty sensor A0VDT2C556AA...

  • Page 96: Drive

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 18. Media Feed Section (Tray 2) 18.2 Drive Main motor (M2) Feed roller Tray2 media feed clutch (CL1) A0VDT2C555AA...

  • Page 97: Operation

    DRAFT 18. Media Feed Section (Tray 2) Theory of operation Ver. 1.0 Feb. 2010 18.3 Operation 18.3.1 Media lift plate mechanism • The media lift plate is pressed down into the locked position (in which the media is loaded in position). •...

  • Page 98: Media Separation Mechanism

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 18. Media Feed Section (Tray 2) 18.3.2 Media separation mechanism • Rotation of the main motor is transmitted through the media feed clutch to thereby drive the feed roller. • The feed roller rotates to take up and feed media into the main body. •...

  • Page 99: Media Empty Condition Detection Control

    DRAFT 18. Media Feed Section (Tray 2) Theory of operation Ver. 1.0 Feb. 2010 18.3.4 Media empty condition detection control • The media empty message “PAPER EMPTY TRAY2” is displayed on the panel when the empty sensor actuator unblocks the media empty sensor. •...

  • Page 100: Conveyance Section (Idc Sensor)

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 19. CONVEYANCE SECTION (IDC sensor) 19. CONVEYANCE SECTION (IDC sensor) 19.1 Composition A0VDT2C630AA IDC sensor lever IDC sensor A0VDT2C545AA...

  • Page 101: Drive

    DRAFT 19. CONVEYANCE SECTION (IDC sensor) Theory of operation Ver. 1.0 Feb. 2010 19.1.1 Drive IDC sensor 2nd transfer release solenoid (SD2) A0VDT2C546AA 19.2 Operation 19.2.1 Toner density detection control • A reflective sensor is used for the IDC sensor that detects the amount of toner sticking to the surface of the transfer belt.

  • Page 102: Idc Sensor Calibration Control

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 19. CONVEYANCE SECTION (IDC sensor) 19.2.2 IDC sensor calibration control • Changes in various types of characteristics due to change with time of the IDC sensor (deteriorated LED, dirty sensor surface), part-to-part variations in the sensors, and change of environment affect the IDC sensor output corresponding to the clear transfer belt surface.

  • Page 103: Conveyance Section (Registration Roller)

    DRAFT 20. CONVEYANCE SECTION (Registration roller) Theory of operation Ver. 1.0 Feb. 2010 20. CONVEYANCE SECTION (Registration roller) 20.1 Composition A0VDT2C631AA Loop detection sensor (PS6) 2nd transfer roller Registration roller Registration sensor (PS5) A0VDT2C551AA 20.2 Drive Main motor (M2) Registration clutch (CL3) Registration roller A0VDT2C552AA Registration sensor...

  • Page 104: Operation

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 20. CONVEYANCE SECTION (Registration roller) 20.3 Operation 20.3.1 Conveyance speed control • The Transport motor provides drive for the conveyance section. • The conveyance speed is variable in two steps and the appropriate one is selected according to the media type and print mode as detailed below.

  • Page 105: Control Of Loop Formed Before Registration Roller

    DRAFT 20. CONVEYANCE SECTION (Registration roller) Theory of operation Ver. 1.0 Feb. 2010 20.3.3 Control of loop formed before registration roller • Media conveyance is stopped after the lapse of a predetermined period of time after the leading edge of the media fed from the feed roller has reached the registration roller. This forms a loop in the media.

  • Page 106: Media Size Error Detection Control

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 20. CONVEYANCE SECTION (Registration roller) 20.3.5 Media size error detection control • To prevent incorrect printed pages, the size of the media being conveyed is detected using the registration sensor and media feed sensor. •...

  • Page 107: Fusing Section

    DRAFT 21. Fusing section Theory of operation Ver. 1.0 Feb. 2010 21. Fusing section 21.1 Composition A0VDT2C632AA Fusing heater Thermistor 1/2 Pressure belt Thermostat A0VDT2C558AA Fusing roller...

  • Page 108: Drive

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 21. Fusing section 21.2 Drive Fusing roller Main motor (M2) A0VDT2C549AA...

  • Page 109: Operation

    DRAFT 21. Fusing section Theory of operation Ver. 1.0 Feb. 2010 21.3 Operation 21.3.1 Fusing roller drive control A. Fusing speed switching control • The main motor provides drive for the fusing section. • To prevent poor fusing performance, the fusing speed is changed in two steps according to the media type.

  • Page 110: Fusing Temperature Control

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 21. Fusing section 21.3.2 Fusing temperature control • To fuse the toner image on the media (image yet to be permanently fixed) properly into the media, the heater lamps are turned ON and OFF as necessary to bring the fusing temperature to an appropriate level.
  • Page 111 DRAFT 21. Fusing section Theory of operation Ver. 1.0 Feb. 2010 A. Warm-up control • Control is provided until the Fusing roller reaches the predetermined level. (1) Control start timing • The power switch is turned ON. • The main body leaves the power save mode. •...

  • Page 112: Protection From Abnormal Temperatures

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 21. Fusing section 21.3.3 Protection from abnormal temperatures • The main body provides protection at three different stages to prevent abnormal temper- atures of the fuser unit. 1. Thermistor protection (Soft protection) 2.

  • Page 113: Fusing Speed Control

    DRAFT 21. Fusing section Theory of operation Ver. 1.0 Feb. 2010 21.3.4 Fusing speed control A. PPM control • The PPM control is performed to inhibit the temperature of the fusing roller from decreas- ing during a multi-print cycle and the temperatures of the edges of the roller from increasing.

  • Page 114: Duplex Section

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 22. DUPLEX SECTION 22. DUPLEX SECTION 22.1 Composition A0VDT2C633AA Switchback roller reverse clutch Switchback roller feed clutch Loop detection clutch Main motor Duplex conveyance sensor Duplex conveyance roller clutch A0VDT2C547AA...

  • Page 115: Drive

    DRAFT 22. DUPLEX SECTION Theory of operation Ver. 1.0 Feb. 2010 22.2 Drive A0VDT2C548AA...

  • Page 116: Operation

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 22. DUPLEX SECTION 22.3 Operation 22.3.1 Media transport control A. Media transport • The main motor provides drive for media transport onto the duplex section. • When the main motor is energized, the media exit roller, switchback roller, transport roller 1, and transport roller 2 are driven to transport media from the duplex section to re-feed- ing position.

  • Page 117: Duplex Print Control

    DRAFT 22. DUPLEX SECTION Theory of operation Ver. 1.0 Feb. 2010 22.3.2 Duplex print control A. 1 sheet operation 1. A sheet of paper is taken up and fed in and the image of the second page of the original is printed. A0VDT2C531AA 2.
  • Page 118 DRAFT Theory of operation Ver. 1.0 Feb. 2010 22. DUPLEX SECTION 4. The paper is subject to skew correc- tion at the registration roller section before being re-fed. A0VDT2C534AA 5. The image of the first page of the original is printed on the paper re-fed from the duplex section.
  • Page 119 DRAFT 22. DUPLEX SECTION Theory of operation Ver. 1.0 Feb. 2010 B. 2 sheet operation 1. A sheet of paper is taken up and fed in and the image of the second page of the original is printed. A0VDT2C531AA 2. The switchback guide operates so as to transport the paper to the switch- back section.
  • Page 120 DRAFT Theory of operation Ver. 1.0 Feb. 2010 22. DUPLEX SECTION 4. The second sheet of paper is taken up and fed in and the image of the fourth page of the original is printed. The first sheet of paper stops tempo- rarily at the re-feeding position.

  • Page 121: Media Exit Section

    DRAFT 23. MEDIA EXIT SECTION Theory of operation Ver. 1.0 Feb. 2010 23. MEDIA EXIT SECTION 23.1 Composition A0VDT2C638AA Switchback roller reverse Switchback roller reverse clutch (CL12) Switchback roller feed clutch (CL11) Media exit roller A0VDT2C642AA...

  • Page 122: Drive

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 23. MEDIA EXIT SECTION 23.2 Drive Main motor (M2) A0VDT2C586AA...

  • Page 123: Operation

    DRAFT 23. MEDIA EXIT SECTION Theory of operation Ver. 1.0 Feb. 2010 23.3 Operation 23.3.1 Transport control A. Media exit switching mechanism • The media transport path is switched between one in the exit direction and one toward the switchback roller. •...
  • Page 124 DRAFT Theory of operation Ver. 1.0 Feb. 2010 23. MEDIA EXIT SECTION <Single-side printing> • Media exits outside the machine with the switchback gate in CLOSE mode. • The switchback roller mode is stopping. Switchback roller CLOSE mode Media exit roller A011T2C536AB <Duplex printing>...

  • Page 125: Media Full Detection

    DRAFT 23. MEDIA EXIT SECTION Theory of operation Ver. 1.0 Feb. 2010 23.3.2 Media full detection • The media full sensor detects the load capacity of output media in the exit tray. • When the media holding plate is low, the edge of the media holding plate shades the media full sensor.

  • Page 126: Image Stabilization Control

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 24. IMAGE STABILIZATION CONTROL 24. IMAGE STABILIZATION CONTROL 24.1 Outline • To ensure uniform output image quality at all times, comprehensive control is provided including control of the developing bias voltage, laser light intensity, registration correc- tion, gamma correction, and other parameters.

  • Page 127: Operation Sequence

    DRAFT 24. IMAGE STABILIZATION CONTROL Theory of operation Ver. 1.0 Feb. 2010 24.2 Operation sequence • Image stabilization control may be divided into three types according to the condition of the main body. • Image stabilization control may be divided into three types: complete correction control, simplified correction control, and individual registration control.

  • Page 128: Complete Correction Control

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 24. IMAGE STABILIZATION CONTROL 24.2.2 Complete correction control • The complete correction control is executed if the simplified correction control is not effective in making the necessary corrections. IDC sensor output control Developing bias control Developing bias control (control of the maximum amount of toner sticking to the transfer belt)

  • Page 129: Control Descriptions

    DRAFT 24. IMAGE STABILIZATION CONTROL Theory of operation Ver. 1.0 Feb. 2010 24.3 Control descriptions 24.3.1 Simplified correction control • The complete correction control is executed if the simplified correction control is not effective in making the necessary corrections. Control name Purpose To check the intensity of light (output value) of the IDC sensor relative to the clear surface of the transfer belt on which no...

  • Page 130: Complete Correction Control

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 24. IMAGE STABILIZATION CONTROL 24.3.2 Complete correction control • The following controls 1 to 6 are collectively called the complete correction control. Control name Purpose Changes in various types of characteristics due to change with time of the IDC sensor (deteriorated LED, dirty sensor surface), part-to-part variations in the sensors, and change of IDC sensor output control...

  • Page 131: Execution Timing

    DRAFT 24. IMAGE STABILIZATION CONTROL Theory of operation Ver. 1.0 Feb. 2010 24.4 Execution timing 24.4.1 Predrive operation • The following describe image stabilization controls performed when, for example, the main power switch is turned ON, the sleep mode is canceled, the door is closed, or a malfunction is reset.

  • Page 132: Power Supply Section

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 25. POWER SUPPLY SECTION 25. POWER SUPPLY SECTION 25.1 Parts energized when the main power switch is turned ON 25.1.1 Configuration Main power switch A0VDT2C634AA 25.1.2 Operation • When the main power switch is turned ON, power is supplied from the DC power supply to the following components.

  • Page 133: Fan Control

    DRAFT 26. FAN CONTROL Theory of operation Ver. 1.0 Feb. 2010 26. FAN CONTROL 26.1 Configuration DC power supply fan motor (FM10) Cooling fan motor (FM11) DC power supply fan motor (FM10) A0VDT2C639AA MFP board cooling fan motor (FM12)

  • Page 134: Operation

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 26. FAN CONTROL 26.2 Operation 26.2.1 Function Motor name Function (purpose) • Discharges heat generated from the interior parts (including the DC power DC power supply fan supply, transfer belt section, toner cartridges/C, M, Y, and motor drives) from motor the main body to prevent the interior temperature from rising inordinately.

  • Page 135: Automatic Document Feeder Section

    DRAFT 27. AUTOMATIC DOCUMENT FEEDER SECTION Theory of operation Ver. 1.0 Feb. 2010 27. AUTOMATIC DOCUMENT FEEDER SECTION 27.1 Composition A0VDT2C635AA Transport motor (M100) Release solenoid Feed roller DF control board (DFCB) Paper interval sensor Document sensor Pick-up roller Document guide A0VDT2C568AA...

  • Page 136: Drive

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 27. AUTOMATIC DOCUMENT FEEDER SECTION 27.2 Drive DF control board (DFCB) A0VDT2C567...

  • Page 137: Operation

    DRAFT 27. AUTOMATIC DOCUMENT FEEDER SECTION Theory of operation Ver. 1.0 Feb. 2010 27.3 Operation 27.3.1 Document feed mechanism • The document sensor detects an original loaded in position. • When the start key is pressed, the transport motor is driven and the pick-up roller is pushed down via the pick-up clutch.

  • Page 138: Document Separation Mechanism

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 27. AUTOMATIC DOCUMENT FEEDER SECTION 27.3.2 Document separation mechanism • Double feeding of paper is prevented using coefficient of friction between the feed roller and separator pad. Feed roller Separator pad A0VDT2C577AA •...

  • Page 139: Document Transport Mechanism

    DRAFT 27. AUTOMATIC DOCUMENT FEEDER SECTION Theory of operation Ver. 1.0 Feb. 2010 27.3.3 Document transport mechanism • The transport roller turns to transport the original that has been taken up onto the docu- ment scanning position of the printer. •...

  • Page 140: Switching Mechanism For Turnover/Paper Exit

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 27. AUTOMATIC DOCUMENT FEEDER SECTION 27.3.5 Switching mechanism for turnover/paper exit • Rotation of the exit switch back roller turns over the original conveyed from the transport section or feeds it out into the document exit tray. •...

  • Page 141: Paper Path

    DRAFT 27. AUTOMATIC DOCUMENT FEEDER SECTION Theory of operation Ver. 1.0 Feb. 2010 27.4 Paper path 27.4.1 1-sided mode • When the start key is pressed, take-up and feeding of the original will be started by the transport motor and pick-up clutch. •...

  • Page 142: 2-Sided Mode

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 27. AUTOMATIC DOCUMENT FEEDER SECTION 27.4.2 2-sided mode 1. The fist side of the original will be read. 2. The exit switch back roller turns backward to feed the original back into the docu- ment feeder.
  • Page 143 DRAFT 27. AUTOMATIC DOCUMENT FEEDER SECTION Theory of operation Ver. 1.0 Feb. 2010 Blank Page...
  • Page 144 DRAFT SERVICE MANUAL THEORY OF OPERATION 2010.02 Ver. 1.0...
  • Page 145 DRAFT Revision history After publication of this service manual, the parts and mechanism may be subject to change for improvement of their performance. Therefore, the descriptions given in this service manual may not coincide with the actual machine. When any change has been made to the descriptions in the service manual, a revised version will be issued with a revision mark added as required.
  • Page 146 DRAFT Theory of operation Ver. 1.0 Feb. 2010 CONTENTS Lower Feeder Unit OUTLINE PRODUCT SPECIFICATIONS ................1 COMPOSITION/OPERATION OVERALL COMPOSITION ..................3 DRIVE ........................4 OPERATIONS ......................5 Media feed control ....................5 4.1.1 Media lift plate mechanism ................5 4.1.2 Feed roller/vertical transport roller control ............
  • Page 147 DRAFT Theory of operation Ver. 1.0 Feb. 2010 Blank Page...

  • Page 148: Outline

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 1. PRODUCT SPECIFICATIONS OUTLINE PRODUCT SPECIFICATIONS A. Type Name Add-on 500-sheet media feed cassette Type Front-loading type Installation Desk type Media feeding system Media separation by a small-diameter roller with torque limiter Document alignment Center B.
  • Page 149 DRAFT 1. PRODUCT SPECIFICATIONS Theory of operation Ver. 1.0 Feb. 2010 Blank Page...

  • Page 150: Composition/Operation

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 2. OVERALL COMPOSITION COMPOSITION/OPERATION OVERALL COMPOSITION A0WJT2C500AA Media feed sensor (PS3) Media empty sensor (PS1) Vertical transport roller Feed roller Separation roller A0VDT2C571AA...

  • Page 151: Drive

    DRAFT 3. DRIVE Theory of operation Ver. 1.0 Feb. 2010 DRIVE Conveyance clutch (CL2) Media feed sensor (PS3) Media feed clutch (CL1) Media feed motor (M1) A0VDT2C569AA...

  • Page 152: Operations

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 4. OPERATIONS OPERATIONS Media feed control 4.1.1 Media lift plate mechanism • The media lift plate is pressed down into the locked position (in which the media is loaded in position). • Load a media stack and then slide the tray into the main body. This unlocks the media lift plate.

  • Page 153: Feed Roller/Vertical Transport Roller Control

    DRAFT 4. OPERATIONS Theory of operation Ver. 1.0 Feb. 2010 4.1.2 Feed roller/vertical transport roller control • The feed roller and vertical transport roller are rotated, which feeds media from the lower feeder unit and conveys it further into the inside of the main body 1.

  • Page 154: Media Separation Mechanism

    DRAFT Theory of operation Ver. 1.0 Feb. 2010 4. OPERATIONS 4.1.3 Media separation mechanism • A separation roller provided with a torque limiter is used to prevent double feeding of media. Feed roller Separation roller 4138to2115c0 4.1.4 Media detection mechanism •...

  • Page 155: Edge Guide Plate

    DRAFT 4. OPERATIONS Theory of operation Ver. 1.0 Feb. 2010 4.1.6 Edge guide plate • The edge guide plate can be slid to the exact size in the width direction of the media to be loaded (A4, B5, 8/12). Edge guide plate 4138to2120c0 4.1.7 Trailing edge guide plate...
  • Page 156 DRAFT Theory of operation Ver. 1.0 Feb. 2010 4. OPERATIONS 4.1.8 Media size detection control • The media size switch detects the length size (feed direction) of the media. 1. The size detection board turns as the trailing edge guide plate is moved. 2.

  • Page 157: Media Reference Position Adjustment Mechanism

    DRAFT 4. OPERATIONS Theory of operation Ver. 1.0 Feb. 2010 4.1.9 Media reference position adjustment mechanism • The edge guide plate can be moved to allow the print start reference position for the media to be adjusted. 1. Through a hole in the media lift plate on top of the tray, loosen two screws that secure the edge guide plate.
  • Page 158 DRAFT © 2010 KONICA MINOLTA BUSINESS TECHNOLOGIES, INC. © 2010 KONICA MINOLTA BUSINESS TECHNOLOGIES, INC. Printed in Japan Printed in Japan Use of this manual should be strictly supervised to Use of this manual should be strictly supervised to DDA0VD-A-TE1 DDA0VD-A-TE1 avoid disclosure of confidential information.

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