Konica Minolta magicolor 1690MF Service Manual
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Konica Minolta magicolor 1690MF Service Manual

Theory of operation
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SERVICE MANUAL
magicolor 1680MF
magicolor 1680MF
magicolor 1690MF
magicolor 1690MF
THEORY OF OPERATION
2008.11
2008.11
Ver. 1.0
Ver. 1.0

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Summary of Contents for Konica Minolta magicolor 1690MF

  • Page 1 SERVICE MANUAL THEORY OF OPERATION magicolor 1680MF magicolor 1680MF magicolor 1690MF magicolor 1690MF 2008.11 2008.11 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 magicolor 1680MF/magicolor 1690MF Main body OUTLINE ........................7 COMPOSITION/OPERATION..................15 Auto document feeder unit OUTLINE ........................
  • Page 3 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 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 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 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 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 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 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 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

    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 SAFETY AND IMPORTANT WARNING ITEMS Fuse Fuse CAUTION • CAUTION Double pole / neutral fusing • ATTENTION Double pôle / Fusible sur le neutre 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.

  • Page 16: Internal Laser Radiation

    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 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 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 20 mW aallonpituus 775 - 800 nm VARNING!

  • Page 19: Laser Safety Label

    SAFETY AND IMPORTANT WARNING ITEMS Laser Safety Label • A laser safety label is attached to the inside of the machine as shown below. A0HFP0C500DA S-16...

  • Page 20: Laser Caution Label

    SAFETY AND IMPORTANT WARNING ITEMS Laser Caution Label • A laser caution label is attached to the outside of the machine as shown below. A0HFP0C501DA 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

    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

    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 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 elec- tric shock. A0HFP0C504DA S-20...
  • Page 24 SAFETY INFORMATION WARNING • Do not burn used Imaging Cartridge. Toner expelled from the fire is dangerous. WARNING • Do not burn used Toner Cartridges. Toner expelled from the fire is dangerous. A0HFP0505DA CAUTION: • You may be burned or injured if you touch any area that you are advised by any caution label to keep yourself away from.

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

    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

    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

    Notation of the service manual A. Product name In this manual, each of the products is described as follows: (1) magicolor 1680MF/magicolor 1690MF Main body (2) Microsoft Windows NT 4.0: Windows NT 4.0 or Windows NT Microsoft Windows 2000: Windows 2000...

  • Page 28: Main Body

    SERVICE MANUAL THEORY OF OPERATION magicolor 1680MF magicolor 1690MF Main body 2008.11 Ver. 1.0...

  • Page 29: Revision History

    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 Theory of Operation Ver. 1.0 Nov. 2008 CONTENTS magicolor 1680MF/magicolor 1690MF Main body OUTLINE System configuration....................1 Product specifications ..................... 2 Center cross section ....................6 Media path ......................7 COMPOSITION/OPERATION Overall composition....................9 Control block diagram ................... 9 Image creation process ..................10 Operation sequence ...................
  • Page 31 Theory of Operation Ver. 1.0 Nov. 2008 10.1 Composition ....................... 23 10.2 Drive ........................23 10.3 Operation......................24 10.3.1 Photo conductor drive mechanism ............. 24 10.3.2 Photo conductor cleaning mechanism............24 Charge corona section..................25 11.1 Composition ....................... 25 11.2 Operation......................25 11.2.1 Charge corona control ................
  • Page 32 Theory of Operation Ver. 1.0 Nov. 2008 15.3 Operation ......................51 15.3.1 Toner collecting mechanism................ 51 15.3.2 Waste toner near full detection system ............52 Media feed section ....................53 16.1 Composition......................53 16.2 Drive ........................54 16.3 Operation ......................55 16.3.1 Up/down control ..................
  • Page 33 Theory of Operation Ver. 1.0 Nov. 2008 20.1 Composition ....................... 68 20.2 Operation......................68 20.2.1 Function ...................... 68 20.2.2 Control conditions ..................69...

  • Page 34: Outline

    Theory of Operation Ver. 1.0 Nov. 2008 1. System configuration OUTLINE System configuration A. magicolor 1680MF A0HFT2C515AA Option magicolor 1680MF Dust cover ( B. magicolor 1690MF A0HFT1C500AA magicolor 1690MF Duplex Option Attachment (Option) Option Duplex Option (Option) Lower Feeder Unit (...

  • Page 35: Product Specifications

    1200 x 600 dpi, 600 x 600 dpi magicolor 1680MF One-way system (Tray 1: 200 sheets) One-way system (Tray 1: 200 sheets) Media feeding system magicolor 1690MF * Expandable to a two-way system by adding an optional Lower Feeder Unit. Developing system Single-element developing system...
  • Page 36 Theory of Operation Ver. 1.0 Nov. 2008 2. Product specifications B. Functions Warm-up time Average 30 seconds (time to return to Ready mode from Energy Save mode) Plain paper 126.78 mm/second Process speed Thick stock 63.39 mm/second Full color 1-sided: 21 seconds First-Page-Out Time (A4/letter, Plain paper) Monochrome...
  • Page 37 1060 W or less (220 V to 240 V) magicolor 1680MF 405 mm (W) x 427 mm (D) x 376 mm (H) Dimensions magicolor 1690MF 405 mm (W) x 427 mm (D) x 432 mm (H) magicolor 1680MF 20.0 kg (including the consumables) Weight magicolor 1690MF 21.0 kg (including the consumables)
  • Page 38 Theory of Operation Ver. 1.0 Nov. 2008 2. Product specifications (2) magicolor 1690MF Type Built-in type controller Standard memory 128MB USB 2.0 (High Speed) compliant, 10Base-T/100Base-T Ethernet, Host USB Interfaces (for scan to USB memory) - Microsoft Windows Vista Home Basic/Home Premium/Ultimate/Business/...

  • Page 39: Center Cross Section

    3. Center cross section Theory of Operation Ver. 1.0 Nov. 2008 Center cross section Auto document feeder section* Scanner section Imaging cartridge section Toner cartridge section Fusing section Write section 2nd transfer section A0HFT2C518AA Media feed section *: Only for the magicolor 1690MF...

  • Page 40: Media Path

    Theory of Operation Ver. 1.0 Nov. 2008 4. Media path Media path <Auto document feeder section> A0HFT2C516AA <Main body (magicolor 1690MF)> A0HFT2C517AA...
  • Page 41 4. Media path Theory of Operation Ver. 1.0 Nov. 2008 Blank Page...

  • Page 42: Composition/Operation

    Control panel FAX* Print control board (PRCB) Paper pi ck-up/ MFP board (MFPB) transport Image processing Image process Fusing Power supply/ high voltage Write unit (PH ) Control system line Image bus line A0VTT2C500AA *: Only for the magicolor 1690MF...

  • Page 43: Image Creation Process

    5. Overall composition Theory of Operation Ver. 1.0 Nov. 2008 Image creation process [9] Transfer belt cleaning [6] 1st image transfer [2] Photo [8] Media separation conductor [7] 2nd image transfer [5] Developing [10] PC drum cleaning [3] Photo conductor charging [1] Printer image processing [4] Laser exposure A00VT1C005AA...

  • Page 44: Operation Sequence

    Theory of Operation Ver. 1.0 Nov. 2008 5. Overall composition Operation sequence A034T2E579AA...

  • Page 45: Interface Section

    6. Interface section Theory of Operation Ver. 1.0 Nov. 2008 Interface section Composition 6.1.1 magicolor 1680MF USB port (USB 2.0) A0HFT2C502AA Type Application USB port For PC to printer connection...

  • Page 46: Magicolor 1690Mf

    Theory of Operation Ver. 1.0 Nov. 2008 6. Interface section 6.1.2 magicolor 1690MF TEL (telephone) jack LINE (telephone line) jack USB port 10Base-T/100Base-TX (IEEE 802.3) Ethernet Interface port A0VTT2C501AA USB memory port A0HFT2C506AA Type Application TEL (telephone) jack For telephone connection...

  • Page 47: Scanner Section

    7. Scanner section Theory of Operation Ver. 1.0 Nov. 2008 Scanner section Composition A0HFT2C501AA A0HFT2C502AA Scanner motor (M101) A0HFT2C512AA Exposure unit...

  • Page 48: Drive

    Theory of Operation Ver. 1.0 Nov. 2008 7. Scanner section Drive A0HFT2C505AA...

  • Page 49: Operation

    7. Scanner section Theory of Operation Ver. 1.0 Nov. 2008 Operation 7.3.1 When the Start key is pressed A. Original reading mode (1) Original cover mode 1. Press the start key, and the LED lights ON. 2. The exposure units moves from the home position (stand-by position ) reading the shading sheet to make a shading compensation.

  • Page 50: Home Position Detection

    Theory of Operation Ver. 1.0 Nov. 2008 7. Scanner section (2) DF mode 1. Press the start key, and the LED lights ON. 2. The exposure units moves from the home position (stand-by position ) reading the shading sheet to make a shading compensation. 3.

  • Page 51: Write Section (Ph Section)

    8. Write section (PH section) Theory of Operation Ver. 1.0 Nov. 2008 Write section (PH section) Composition A034T2C574AA SOS mirror Return mirror G2 lens SOS sensor G1 Lens Semiconductor laser Polygon mirror A034T2C504AA...

  • Page 52: Operation

    Theory of Operation Ver. 1.0 Nov. 2008 8. Write section (PH section) Operation 8.2.1 Outline • The surface of the photo conductor is irradiated with a laser light and an electrostatic latent image is thereby formed. • The polygon mirror has four faces. The machine uses a two-beam array LD to inhibit the speed of the polygon mirror from increasing because of the decreased number of faces the polygon mirror has as compared with the conventional models.

  • Page 53: Laser Emission Area

    8. Write section (PH section) Theory of Operation Ver. 1.0 Nov. 2008 8.2.3 Laser emission area A. Main scan direction (CD) • The print start position in the CD direction is determined by the CD print start signal (/ HSYNC) that is output from the MFP board (MFPB) and the width of the media. •...

  • Page 54: Imageing Cartridge Section

    Theory of Operation Ver. 1.0 Nov. 2008 9. Imageing cartridge section Imageing cartridge section Composition A034T2C554AA Driven roller2 Transfer belt 1st transfer roller Driven roller1 Photo conductor Charge corona A034T2C506AA...

  • Page 55: Drive

    9. Imageing cartridge section Theory of Operation Ver. 1.0 Nov. 2008 Drive A034T2C508AA Operation 9.3.1 Imaging cartridge (IC) life control A. New DC detection • The machine attempts to perform a new IC detection sequence when the power switch is turned OFF and ON, or the Front door is closed.

  • Page 56: Photo Conductor Section

    Theory of Operation Ver. 1.0 Nov. 2008 10. Photo conductor section 10. Photo conductor section 10.1 Composition Photo conductor Charge generating layer Charge transport layer Aluminum base A034T2C555AA 4139to2057e1 10.2 Drive Photo conductor Transport motor A034T2C507AA...

  • Page 57: Operation

    10. Photo conductor section Theory of Operation Ver. 1.0 Nov. 2008 10.3 Operation 10.3.1 Photo conductor drive mechanism A. Photo conductor drive • The photo conductor is driven by the Main motor (M1). 10.3.2 Photo conductor cleaning mechanism • The cleaning blade is pressed up against the surface of the photo conductor, scraping residual toner off the surface.

  • Page 58: Charge Corona Section

    Theory of Operation Ver. 1.0 Nov. 2008 11. Charge corona section 11. Charge corona section 11.1 Composition A034T2C570AA A034T2C569AA Photo conductor Charge corona A034T2C510AA 11.2 Operation 11.2.1 Charge corona control A. Charging grid • The photo conductor is charged through corona discharge from the photo conductor charge corona.

  • Page 59: Developing Section

    12. Developing section Theory of Operation Ver. 1.0 Nov. 2008 12. Developing section 12.1 Composition Hopper section Supply section Developing roller Supply roller A034T2C571AA A034T2C513AA Transfer belt Y Developing roller Photo conductor Agitating screw M Developing roller K Developing roller C Developing roller A034T2C512AA...

  • Page 60: Drive

    Theory of Operation Ver. 1.0 Nov. 2008 12. Developing section 12.2 Drive Imaging cartridge Transport motor Rack motor A034T2C511AA 12.3 Operation 12.3.1 Toner flow • Toner stored in the hopper is conveyed into the toner supply portion through rotation of the toner cartridge rack.

  • Page 61: Toner Cartridge Rack

    12. Developing section Theory of Operation Ver. 1.0 Nov. 2008 12.3.2 Toner Cartridge Rack • The toner cartridge rack is mounted with four toner cartridges. The rack employs a rotary system. • Development of the image of each color of toner is performed by rotating the toner car- tridge rack.
  • Page 62 Theory of Operation Ver. 1.0 Nov. 2008 12. Developing section B. Toner cartridge rack stop position • The toner cartridge rack must be brought to a stop so that the toner cartridge of each color of toner is located at its correct position. To accomplish this task, three stop posi- tions are established: the standby (reference) position, the developing position, and the cartridge replacement position.
  • Page 63 12. Developing section Theory of Operation Ver. 1.0 Nov. 2008 (3) Cartridge replacement position • The cartridge replacement position is where the toner cartridge rack is rotated 90° from the developing position. For developing of C 90° Standby position Cartridge replacement position A034T2C517AA C.
  • Page 64 Theory of Operation Ver. 1.0 Nov. 2008 12. Developing section D. Color printing process (1) Operation sequence 1. The toner cartridge rack is stationary at the standby position. 2. When a print request is received from the controller, the toner cartridge rack is rotated and temporarily stopped at the K developing position.
  • Page 65 12. Developing section Theory of Operation Ver. 1.0 Nov. 2008 E. Toner cartridge rack stop position detection • The toner cartridge rack stop position for each color of toner is detected by the Rack motor (M2) and the Rack positioning sensor (PS5). •...
  • Page 66 Theory of Operation Ver. 1.0 Nov. 2008 12. Developing section (1) Toner cartridge rack standby position • The M toner cartridge is provided with a slit for detecting the standby position. • When the toner cartridge rack is rotated, the Rack positioning sensor (PS3) moves past the slit for detecting the standby position.

  • Page 67: Developing Roller Drive

    12. Developing section Theory of Operation Ver. 1.0 Nov. 2008 12.3.3 Developing Roller drive • The developing roller is driven by the Developing motor (M3) and Intermediate gear. • When the toner cartridge rack is stationery at the developing position, the developing roller drive gear comes into mesh with the Intermediate gear.

  • Page 68: Developing System

    Theory of Operation Ver. 1.0 Nov. 2008 12. Developing section 12.3.5 Developing system • The machine employs the single-component, non-contact developing system. • In the non-contact, single-component developing system, the magnetic brush does not rub the surface of the photo conductor (or the image). This prevents a foggy image from occurring and the photo conductor from being worn.

  • Page 69: St Transfer Section

    13. 1st transfer section Theory of Operation Ver. 1.0 Nov. 2008 13. 1st transfer section 13.1 Composition A034T2C527AA A034T2C570AA 1st transfer roller Driven roller 2 Transfer belt IDC sensor (IDC) Driven roller 1 Toner collecting screw Cleaning blade Belt positioning sensor (PS6) Waste toner near full sensor (PS7) A034T2C526AA...

  • Page 70: Drive

    Theory of Operation Ver. 1.0 Nov. 2008 13. 1st transfer section 13.2 Drive A034T2C508AA...

  • Page 71: Operation

    13. 1st transfer section Theory of Operation Ver. 1.0 Nov. 2008 13.3 Operation 13.3.1 1st transfer output control • The 1st image transfer roller is not equipped with a pressure/retraction mechanism and presses the transfer belt up against the photo conductor drum. •...

  • Page 72: Cleaning Blade Pressure/Retraction Mechanism

    Theory of Operation Ver. 1.0 Nov. 2008 13. 1st transfer section 13.3.3 Cleaning blade pressure/retraction mechanism • In color printing, an image is formed on the transfer belt for each color of toner. The cleaning blade is therefore provided with a pressure/retraction mechanism. •...
  • Page 73 13. 1st transfer section Theory of Operation Ver. 1.0 Nov. 2008 B. Operation timing Point of contact with the transfer belt Cleaning blade pressure/ retraction solenoid Cleaning blade pressure/ Retraction stop During pressure operation Retraction stop retraction condition Point of contact with the transfer belt Cleaning blade pressure/ retraction solenoid Cleaning blade pressure/...
  • Page 74 Theory of Operation Ver. 1.0 Nov. 2008 13. 1st transfer section D. Pressure sequence 1. When the Cleaning blade pressure/retraction solenoid (SD5) is energized in the condition, in which the cleaning blade is retracted from the transfer belt, the pres- sure cam rotates a half turn.

  • Page 75: Belt Positioning Sensor

    13. 1st transfer section Theory of Operation Ver. 1.0 Nov. 2008 13.3.4 Belt Positioning Sensor • When development takes place in this machine, the image of each color of toner is formed on the surface of the transfer belt. The leading edge of the image of each color of toner must therefore be aligned correctly with each other on the surface of the transfer belt.

  • Page 76: Atvc (Auto Transfer Voltage Control)

    Theory of Operation Ver. 1.0 Nov. 2008 13. 1st transfer section 13.3.5 ATVC (Auto transfer voltage control) • The ATVC, or Auto transfer voltage control, is for optimizing the transfer output. A con- stant current is made to flow through each of the transfer rollers. From the voltage thereby detected, the resistance of each of the 1st transfer roller, 2nd transfer roller, and transfer belt is measured.

  • Page 77: Image Stabilization Control Item

    13. 1st transfer section Theory of Operation Ver. 1.0 Nov. 2008 13.3.6 Image stabilization control item • IDC sensor LED intensity control • Transfer belt surface correction control • Control of the maximum amount of toner sticking • Laser intensity adjustment control •...

  • Page 78: Nd Transfer Section/ Media Separation

    Theory of Operation Ver. 1.0 Nov. 2008 14. 2nd transfer section/ media separation 14. 2nd transfer section/ media separation 14.1 Composition 2nd transfer roller 2nd transfer roller Pressure/ Retraction slider A034T2C533AA A034T2C557AA 2nd image transfer pressure/ retraction solenoid 2nd transfer roller A0HFT2C507AA...

  • Page 79: Drive

    14. 2nd transfer section/ media separation Theory of Operation Ver. 1.0 Nov. 2008 14.2 Drive 2nd transfer roller Transport motor (M1) A034T2C534AA...

  • Page 80: Operation

    Theory of Operation Ver. 1.0 Nov. 2008 14. 2nd transfer section/ media separation 14.3 Operation 14.3.1 2nd transfer roller pressure/retraction control • In color printing, the toner image of each color of toner is transferred to the transfer belt (thus a total of four times to cover the four colors of toner). Pressure/retraction control with respect to the transfer belt is therefore provided for the 2nd transfer roller.

  • Page 81: 2Nd Transfer Roller Cleaning

    14. 2nd transfer section/ media separation Theory of Operation Ver. 1.0 Nov. 2008 (1) Retraction sequence 1. When the 2nd image transfer pressure/retraction solenoid (SD4) is energized in the condition in which the 2nd transfer roller is pressed against the transfer belt, the Pressure/retraction clutch rotates a half turn.

  • Page 82: Neutralization And Separation Of Media

    Theory of Operation Ver. 1.0 Nov. 2008 14. 2nd transfer section/ media separation 14.3.3 Neutralization and separation of media • To neutralize the media that has undergone the 2nd transfer process, a Charge neutraliz- ing cloth is provided for the guide plate after the 2nd transfer roller. Charge neutralizing cloth Charge neutralizing cloth 2nd transfer roller...

  • Page 83: Toner Collecting Section

    15. Toner collecting section Theory of Operation Ver. 1.0 Nov. 2008 15. Toner collecting section 15.1 Composition Toner collecting screw 1 Toner collecting screw 2 A034T2C537AA 15.2 Drive Toner collecting screw 1 Waste toner near full sensor Toner collecting screw 2 Toner agitating screw Transport motor (M1) A034T2C538AA...

  • Page 84: Operation

    Theory of Operation Ver. 1.0 Nov. 2008 15. Toner collecting section 15.3 Operation 15.3.1 Toner collecting mechanism • Waste toner scraped off by the cleaning blade of the transfer belt and that scraped off by the cleaning blade of the photo conductor are conveyed by each of the toner collecting screws into the drum cartridge.

  • Page 85: Waste Toner Near Full Detection System

    15. Toner collecting section Theory of Operation Ver. 1.0 Nov. 2008 15.3.2 Waste toner near full detection system • Waste toner near full and waste toner full conditions are detected through the control performed using the Waste toner near full sensor, toner agitating screw, and the internal counter.

  • Page 86: Media Feed Section

    Theory of Operation Ver. 1.0 Nov. 2008 16. Media feed section 16. Media feed section 16.1 Composition Media feed roller A034T2C559AA A034T2C558AA Media feed roller Tray1 media feed solenoid (SD1) A0HFT2C508AA...

  • Page 87: Drive

    16. Media feed section Theory of Operation Ver. 1.0 Nov. 2008 16.2 Drive Transport motor (M1) Media feed roller Tray1 media feed solenoid (SD1) A034T2C542AA...

  • Page 88: Operation

    Theory of Operation Ver. 1.0 Nov. 2008 16. Media feed section 16.3 Operation 16.3.1 Up/down control A. Up/down operation • When the Tray1 Paper pick-up solenoid (SD1) is energized, drive from the Main motor (M1) is transmitted to the Pick-up roller via the Paper pick-up clutch. The Pick-up roller is thereby rotated.

  • Page 89: Paper Feed Control

    16. Media feed section Theory of Operation Ver. 1.0 Nov. 2008 16.3.2 Paper feed control A. Pick-up/separation control • When the Tray 1 media feed solenoid (SD1) is energized, drive from the Transport motor (M1) is transmitted to the pick-up roller via the paper pick-up clutch and the pick-up roller is rotated.

  • Page 90: Media Feed Retry Function

    Theory of Operation Ver. 1.0 Nov. 2008 16. Media feed section 16.3.5 Media feed retry function • To reduce the number of media misfeeds detected due to failure to take up and feed in media properly during color printing, another media feed sequence is carried out if the Registration sensor (PS1) is not unblocked and blocked within a predetermined period of time.

  • Page 91: Fusing Section

    17. Fusing section Theory of Operation Ver. 1.0 Nov. 2008 17. Fusing section 17.1 Composition A034T2C575AA A034T2C561AA Thermostat Thermistor (TH1) Exit sensor (PS7) Heater lamp Pressure roller Fusing roller A034T2C551AA...

  • Page 92: Drive

    Theory of Operation Ver. 1.0 Nov. 2008 17. Fusing section 17.2 Drive Fusing roller Transport motor A0HFT2C509AA...

  • Page 93: Operation

    17. Fusing section Theory of Operation Ver. 1.0 Nov. 2008 17.3 Operation 17.3.1 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 94: Wait Control

    Theory of Operation Ver. 1.0 Nov. 2008 17. Fusing section D. Control start decision • Either of the following two control start decisions is made according to the temperature detected by the temperature/humidity sensor. The fusing temperature during the print cycle varies depending on the type of the start control carried out, either low temperature start control or ordinary start control.

  • Page 95: Protection Against Abnormally High Temperature

    17. Fusing section Theory of Operation Ver. 1.0 Nov. 2008 17.3.4 Protection against abnormally high temperature • The machine provides protection at three different stages to prevent abnormally high temperature of the Fusing unit. A. Soft protection • If the Thermistor (TH1) detects a temperature exceeding a predetermined value, the mal- function code representing abnormally high temperature is displayed.

  • Page 96: Media Exit Section

    Theory of Operation Ver. 1.0 Nov. 2008 18. Media exit section 18. Media exit section 18.1 Composition A0HFT2C513AA Media exit roll Media exit roller Media full sensor (PS16) A0HFT2C514AA...

  • Page 97: Drive

    18. Media exit section Theory of Operation Ver. 1.0 Nov. 2008 18.2 Drive Exit roller Transport motor A0HFT2C510AA 18.3 Operation 18.3.1 Conveyance control A. Reverse/paper exit switch control • The exit roller is driven by the transport motor. • During 1-sided printing, the exit roller rotates in the forward direction and feeds the media transported from the fusing section out onto the media exit tray.

  • Page 98: Image Stabilization Control

    Theory of Operation Ver. 1.0 Nov. 2008 19. Image stabilization control 19. Image stabilization control 19.1 Overview • To ensure that a stabilized output image is produced at all times, the following image sta- bilization controls are provided. Purpose Control Detection ATVC To ensure stabilized transfer...

  • Page 99: Operation

    19. Image stabilization control Theory of Operation Ver. 1.0 Nov. 2008 19.2 Operation 19.2.1 Leak detection control • For the clearance between the photo conductor and developing roller, an optimum devel- oping bias voltage is established that does not result in a leak image or uneven density. 19.2.2 IDC sensor LED intensity control •...

  • Page 100: G Correction Control

    Theory of Operation Ver. 1.0 Nov. 2008 19. Image stabilization control 19.3 Operation timing Mode Operation timing • The environment in which the power switch is turned ON is different from the environ- ment the machine was in when the power switch was turned OFF last. •...

  • Page 101: Fan Control

    20. Fan control Theory of Operation Ver. 1.0 Nov. 2008 20. Fan control 20.1 Composition Exit tray cooling fan motor (FM4) DC power supply fan motor (FM1) Suction Exhaust Ozone ventilation fan motor (FM2) A0HFT2C511AA 20.2 Operation 20.2.1 Function Motor name Function (purpose) To discharge heat stagnant inside the machine to the outside to DC power supply fan motor (FM1)

  • Page 102: Control Conditions

    Theory of Operation Ver. 1.0 Nov. 2008 20. Fan control 20.2.2 Control conditions Motor name Condition Control conditions • For a predetermined period of time after the power is turned ON • For a predetermined period of time after the end of the (high Energy save mode speed)
  • Page 103 20. Fan control Theory of Operation Ver. 1.0 Nov. 2008 Blank Page...

  • Page 104: Auto Document Feeder Unit

    SERVICE MANUAL THEORY OF OPERATION Auto Document Feeder Unit 2008.11 Ver. 1.0...
  • Page 105 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 106 Theory of Operation Ver. 1.0 Nov. 2008 CONTENTS Auto document feeder unit OUTLINE Product Specifications..................... 1 COMPOSITION/OPERATION Composition ......................3 Drive ........................4 Mechanical operations .................... 5 Document feed mechanism .................. 5 4.1.1 Document separation mechanism..............6 Document transport/exit mechanism ..............7 4.2.1 Document transport mechanism ..............
  • Page 107 Theory of Operation Ver. 1.0 Nov. 2008 Blank Page...

  • Page 108: Outline

    Theory of Operation Ver. 1.0 Nov. 2008 1. Product Specifications OUTLINE Product Specifications A. Type Name Automatic Document Feeder Installation Inserted at upper-rear side of main body Document alignment Center Document loading Face up Color (600 x 300 dpi) 3.0 opm Monochrome (600 x 300 10 opm Scan speed...
  • Page 109 1. Product Specifications Theory of Operation Ver. 1.0 Nov. 2008 E. Paper feed prohibited originals • The following types of originals should not be used. Types of document Possible malfunctions Feed failure, damage to the original, or drive Original that is stapled or clipped. failure due to clip clogging Misfeed, broken original, or folded paste-up Pasted originals...

  • Page 110: Composition/Operation

    Theory of Operation Ver. 1.0 Nov. 2008 2. Composition COMPOSITION/OPERATION Composition A0HFT2C519AA Relay board/1 (REYB/1) DF transport motor (M100) Registration roll/1 Registration roller Media feed roller Pick-up roller A0HFT2C506AA...

  • Page 111: Drive

    3. Drive Theory of Operation Ver. 1.0 Nov. 2008 Drive A0HFT2C507AA...

  • Page 112: Mechanical Operations

    Theory of Operation Ver. 1.0 Nov. 2008 4. Mechanical operations Mechanical operations Document feed mechanism • The media feed sensor detects a document that has been properly loaded in the docu- ment feeder. • The document stopper establishes the leading edge position of the document loaded in the document feeder.

  • Page 113: Document Separation Mechanism

    4. Mechanical operations Theory of Operation Ver. 1.0 Nov. 2008 4.1.1 Document separation mechanism • Double feeding of paper is prevented using coefficient of friction between the media feed roller and separator pad. Media feed roller Separator pad A0HFT2C509AA Single sheet feeding : The coefficient of friction on the front side of the paper fed between the media feed roller and separator pad is equal to that on the backside of the paper.

  • Page 114: Document Transport/Exit Mechanism

    Theory of Operation Ver. 1.0 Nov. 2008 4. Mechanical operations Document transport/exit mechanism 4.2.1 Document transport mechanism • The registration roller is rotated by the drive from the DF transport motor and transports the original that has been taken up to the document scanning position of the printer. •...

  • Page 115: Document Exit Mechanism

    4. Mechanical operations Theory of Operation Ver. 1.0 Nov. 2008 4.2.2 Document exit mechanism • The exit roller turns to feed the original out of the document feeder. The original is fed onto the document exit tray. • The DF transport motor turns the exit roller through a gear train. DF transport motor (M100) Exit roller A0HFT2C511AA...

  • Page 116: Lower Feeder Unit

    SERVICE MANUAL THEORY OF OPERATION Lower Feeder Unit 2008.11 Ver. 1.0...
  • Page 117 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 118 Theory of Operation Ver. 1.0 Nov. 2008 CONTENTS Lower Feeder Unit OUTLINE Product specifications ..................... 1 Type ........................1 Paper type ......................1 Machine specifications..................1 Operating environment ..................1 Composition/Drive Composition ......................3 Drive ........................4 Drive ........................5 Conveyance drive mechanism................
  • Page 119 Theory of Operation Ver. 1.0 Nov. 2008 Blank Page...

  • Page 120: Outline

    Theory of Operation Ver. 1.0 Nov. 2008 1. Product specifications OUTLINE Product specifications Type Name Add-on 500-sheet paper feed cassette Installation Desk type Document alignment Center Paper type Paper size A4S/LetterS Paper type Plain paper: 60 to 90 g/m (16 to 24 lb) Capacity 500 sheets Machine specifications...
  • Page 121 1. Product specifications Theory of Operation Ver. 1.0 Nov. 2008 Blank Page...

  • Page 122: Composition/Drive

    Theory of Operation Ver. 1.0 Nov. 2008 2. Composition Composition/Drive Composition Feed roller A0VPT2C502AA A0VPT2C501AA Media empty sensor (PS10) Feed roller Tray set sensor (PS11) Media feed solenoid (SD6) A0VPT2C503AA...
  • Page 123 3. Drive Theory of Operation Ver. 1.0 Nov. 2008 Drive Media feed solenoid (SD6) A0VPT2C504AA...

  • Page 124: Drive

    Theory of Operation Ver. 1.0 Nov. 2008 4. Drive Drive Conveyance drive mechanism • The lower feeder unit is not provided with any drive motor. The driving force for media feeding and conveyance (drive from M1) is transmitted through a coupling gear from the printer.

  • Page 125: Media Empty Detection

    4. Drive Theory of Operation Ver. 1.0 Nov. 2008 Media Empty Detection • The media empty sensor (PS10) of the PC control board (PCCB) detects a media empty condition in the lower feeder unit. • When there is media loaded in the lower feeder unit, the actuator is raised, which unblocks the sensor.

  • Page 126: Duplex Unit

    SERVICE MANUAL THEORY OF OPERATION Duplex Unit 2008.11 Ver. 1.0...
  • Page 127 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 128 Theory of Operation Ver. 1.0 Nov. 2008 CONTENTS Duplex Option OUTLINE Product specifications ..................... 1 COMPOSITION/OPERATION Composition ......................3 Duplex option......................3 Attachment ......................4 Drive ........................5 Duplex option......................5 Attachment ......................5 Operations....................... 6 Switchback mechanism ..................6 4.1.1 Switchback operation ..................
  • Page 129 Theory of Operation Ver. 1.0 Nov. 2008 Blank Page...

  • Page 130: Outline

    Theory of Operation Ver. 1.0 Nov. 2008 1. Product specifications OUTLINE Product specifications A. Type Name Duplex Option Installation Mounted on the back side of main body Reversing system Exit roller switchback Document alignment Center B. Paper type Paper size A4S/LetterS Paper type •...
  • Page 131 1. Product specifications Theory of Operation Ver. 1.0 Nov. 2008 Blank Page...

  • Page 132: Composition/Operation

    Theory of Operation Ver. 1.0 Nov. 2008 2. Composition COMPOSITION/OPERATION Composition Duplex option Transport roller/1 Registration roller A0VT 2C509AA A0VTT2C501AA Cooling fan motor (FM3) Switchback motor (M5) Transport roller/1 Door sensor (PS14) Transport Sensor/1 (PS15) Transport motor (M6) AD drive board (ADDB) Registration solenoid (SD7) Registration roller Loop sensor (PS13)

  • Page 133: Attachment

    2. Composition Theory of Operation Ver. 1.0 Nov. 2008 Attachment Transport roller/2 A0VT 2C512AA A0VT 2C510AA Transport Sensor/2 (PS17) A0VT 2C511AA...

  • Page 134: Drive

    Theory of Operation Ver. 1.0 Nov. 2008 3. Drive Drive Duplex option Switchback motor (M5) Transport roller 1 Transport motor (M6) Registration roller A0VT 2C503AA Attachment Transport roller 2 Transport motor (M1) A0VT 2C513AA...

  • Page 135: Operations

    4. Operations Theory of Operation Ver. 1.0 Nov. 2008 Operations Switchback mechanism 4.1.1 Switchback operation • The media exit roller of the main unit is used to subject the 1-sided print to a switchback sequence so that the 1-sided print is to be transported through the duplex option. Exit roller Switchback motor (M5) Feeding the media into duplex option...

  • Page 136: Switchback Motor Control

    Theory of Operation Ver. 1.0 Nov. 2008 4. Operations 4.1.3 Switchback Motor Control • Rotation of the Switchback motor (M5) is controlled by the signal output from the AD drive board (ADDB).

  • Page 137: Transport And Duplex Media Take-Up Mechanism

    4. Operations Theory of Operation Ver. 1.0 Nov. 2008 Transport and duplex media take-up mechanism 4.2.1 Transport and duplex media take-up operation • Drive for the duplex option is provided by the Transport motor (M6). Transport motor (M6) Transport roller Registration roller A0VT 2C506AA 4.2.2...

  • Page 138: Loop Correction Control

    Theory of Operation Ver. 1.0 Nov. 2008 4. Operations 4.2.4 Loop correction control • A loop correction mechanism is provided to prevent skew from occurring in the second page. • The Registration solenoid (SD7) is energized after the lapse of a given period of time after the Loop sensor (PS13) has been activated.

  • Page 139: 2-Sided Printing Method

    4. Operations Theory of Operation Ver. 1.0 Nov. 2008 2-sided printing method • The following two types of 2-sided printing methods are available. 2-sided printing with a single sheet of media resident in the system 2-sided printing method 2-sided printing with two sheets of media resident in the system (When the FD length is no less than 276 mm, no more than 297 mm).
  • Page 140 Theory of Operation Ver. 1.0 Nov. 2008 4. Operations Operation 4 • The main unit carries out the second print cycle to produce the print image of the first page of the original on the other side of the 1-sided print. Operation 5 •...

  • Page 141: Operations In 2-Sided Printing With Two Sheets Of Media Resident In The System

    4. Operations Theory of Operation Ver. 1.0 Nov. 2008 4.4.2 Operations in 2-sided printing with two sheets of media resident in the sys- Operation 1 Media Exit • The first sheet of media is taken up and fed in from the Roller main unit drawer and the main unit starts the first print cycle to produce the print image of the second page of the...
  • Page 142 Theory of Operation Ver. 1.0 Nov. 2008 4. Operations Operation 5 • While feeding the first 2-sided print out, main unit produces the print image of the 6th page of the original on the third sheet of media. • The second sheet of media waits at the duplex take-up posi- tion until the third sheet of media is subjected to a switch- back sequence.
  • Page 143 4. Operations Theory of Operation Ver. 1.0 Nov. 2008 • 2-sided printing of two A4 originals with two sheets of media resident in the sys- Belt Positioning Sensor (PS6) Registration Sensor (PS2) Exit Sensor (PS4) Forward Backward Forward Backward Forward Backward Forward Backward...
  • Page 144 © 2008 KONICA MINOLTA BUSINESS TECHNOLOGIES, INC. © 2008 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 DDA0HF-A-TE1 DDA0HF-A-TE1 avoid disclosure of confidential information.

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