Konica Minolta bizhub C652 Service Manual
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Konica Minolta bizhub C652 Service Manual

Konica Minolta bizhub C652 Service Manual

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SERVICE MANUAL
THEORY OF OPERATION
2009.01
Ver. 1.0

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Summary of Contents for Konica Minolta bizhub C652

  • Page 1 SERVICE MANUAL THEORY OF OPERATION 2009.01 Ver. 1.0...

  • Page 2: Table Of Contents

    WARNING INDICATIONS ON THE MACHINE ............S-18 MEASURES TO TAKE IN CASE OF AN ACCIDENT ............S-21 Composition of the service manual ................. C-1 Notation of the service manual ..................C-2 bizhub C652/C552 Main body OUTLINE ........................1 CONFIGURATION/OPERATION .................. 13 DF-618 OUTLINE ........................
  • Page 3 AU-101/AU-102/AU-201/OT-503 AU-101/AU-102....................... 1 AU-201..........................2 OT-503 ..........................3...

  • Page 4: Safety And Important Warning Items

    IMPORTANT NOTICE 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: Power Plug Selection

    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: Checkpoints When Performing On-Site Service

    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 customer engi- neer (hereafter called the CE) from the risk of injury. However, in daily use, any electrical equipment may be subject to parts wear and eventual failure.
  • Page 8 SAFETY AND IMPORTANT WARNING ITEMS Power Plug and Cord WARNING • When using the power cord set (inlet type) that came with this product, make sure the connector is securely inserted in the inlet of the product. When securing measure is provided, secure the cord with the fixture properly.
  • Page 9 SAFETY AND IMPORTANT WARNING ITEMS Wiring WARNING • Never use multi-plug adapters to plug multiple power cords in the same outlet. If used, the risk of fire exists. • When an extension cord is required, use a specified one. Current that can flow in the extension cord is limited, so using a too long extension cord may result in fire.

  • Page 10: Inspection Before Servicing

    SAFETY AND IMPORTANT WARNING ITEMS Ventilation CAUTION • The product generates ozone gas during operation, but it will not be harmful to the human body. If a bad smell of ozone is present in the following cases, ventilate the room. a.
  • Page 11 SAFETY AND IMPORTANT WARNING ITEMS Work Performed with the Product Powered On WARNING • Take every care when making adjustments or performing an operation check with the product powered. If you make adjustments or perform an operation check with the external cover detached, you may touch live or high-voltage parts or you may be caught in moving gears or the timing belt, leading to a risk of injury.
  • Page 12 SAFETY AND IMPORTANT WARNING ITEMS Safety Checkpoints WARNING • Check electrode units such as a charging corona unit for deterioration and sign of leakage. Current can leak, leading to a risk of trouble or fire. • Before disassembling or adjusting the write unit (P/H unit) incorporating a laser, make sure that the power cord has been disconnected.

  • Page 13: Handling Of Consumables

    SAFETY AND IMPORTANT WARNING ITEMS Safety Checkpoints WARNING • Make sure that all screws, components, wiring, connec- tors, etc. that were removed for safety check and mainte- nance have been reinstalled in the original location. (Pay special attention to forgotten connectors, pinched cables, forgotten screws, etc.) A risk of product trouble, electric shock, and fire exists.
  • Page 14 SAFETY AND IMPORTANT WARNING ITEMS Handling of Service Materials CAUTION • Use only a small amount of cleaner at a time and take care not to spill any liquid. If this happens, immediately wipe it off. A risk of fire exists. •...
  • Page 15 SAFETY AND IMPORTANT WARNING ITEMS [4] Used Batteries Precautions ALL Areas CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s instructions. Germany VORSICHT! Explosionsgefahr bei unsachgemäßem Austausch der Batterie.

  • Page 16: Internal Laser Radiation

    Internal Laser Radiation semiconductor laser Maximum power of the laser diode 30 mW bizhub C652 15.2 µW Maximum average radiation power (*) bizhub C552 12.9 µW Wavelength...
  • 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 30 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. * Only for the U.S.A. A00JP0E507DA Laser Caution Label • A laser caution label is attached to the outside of the machine as shown below. A00JP0C503DA S-16...

  • Page 20: Precautions For Handling The Laser Equipment

    SAFETY AND IMPORTANT WARNING ITEMS PRECAUTIONS FOR HANDLING THE LASER EQUIPMENT • When laser protective goggles are to be used, select ones with a lens conforming to the above specifications. • When a disassembly job needs to be performed in the laser beam path, such as when working around the printerhead and PC drum, be sure first to turn the printer OFF.

  • Page 21: Warning Indications On The Machine

    SAFETY AND IMPORTANT WARNING ITEMS WARNING INDICATIONS ON THE MACHINE Caution labels shown 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. WARNING Do not burn used toner cartridges.

  • Page 22: High Voltage

    SAFETY AND IMPORTANT WARNING ITEMS 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. 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.
  • Page 23 SAFETY AND IMPORTANT WARNING ITEMS 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. 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.

  • Page 24: 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 25 MEASURES TO TAKE IN CASE OF AN ACCIDENT Blank Page S-22...

  • 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 A. Product name In this manual, each of the products is described as follows: (1) bizhub C652/C552: Main body (2) Microsoft Windows 98: Windows 98 Microsoft Windows Me: Windows Me Microsoft Windows NT 4.0: Windows NT 4.0 or Windows NT...

  • Page 28: Theory Of Operation

    SERVICE MANUAL THEORY OF OPERATION 2009.01 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 Jan. 2009 CONTENTS bizhub C652/C552 Main body OUTLINE SYSTEM CONFIGURATION................... 1 bizhub C652/C552 ....................1 PRODUCT SPECIFICATIONS ................3 Type ........................3 Functions ......................4 Paper ........................6 Materials ....................... 7 Print volume......................8 Machine specifications..................8 Operating environment ..................
  • Page 31 Theory of Operation Ver. 1.0 Jan. 2009 7.3.5 Original size detection control..............33 7.3.6 Image processing ..................35 WRITE SECTION (PH SECTION) ................ 36 Configuration ...................... 36 Operation......................37 8.2.1 Outline ......................37 8.2.2 Laser exposure process................38 8.2.3 Laser emission timing ................. 39 8.2.4 Laser emission stop..................
  • Page 32 Theory of Operation Ver. 1.0 Jan. 2009 12.3.1 Developer flow..................... 66 12.3.2 Auto refining developing system ..............68 12.3.3 Developing bias................... 69 12.3.4 Toner scattering prevention................. 70 12.3.5 Developing cooling control ................71 12.3.6 Toner density control ................... 72 TONER SUPPLY SECTION .................. 73 13.1 Configuration ......................
  • Page 33 Theory of Operation Ver. 1.0 Jan. 2009 16.3.3 Detection of waste toner box loaded in position ........102 16.3.4 Waste Toner full detection................. 103 PAPER FEED SECTION (TRAY1, TRAY2)............105 17.1 Configuration ....................105 17.1.1 Major components ..................105 17.1.2 Layout of sensors and rollers..............
  • Page 34 Theory of Operation Ver. 1.0 Jan. 2009 19.3.4 Remaining paper detection control ............151 19.3.5 Detection of bypass unit opened/closed ........... 152 19.3.6 Detection of bypass sub tray extended/retracted ........153 VERTICAL TRANSPORT SECTION..............154 20.1 Configuration ....................154 20.2 Drive ......................... 155 20.3 Operation ......................
  • Page 35 Theory of Operation Ver. 1.0 Jan. 2009 23.3.2 Duplex circulation control................189 PAPER EXIT SECTION ..................195 24.1 Configuration ....................195 24.2 Drive ......................... 196 24.3 Operation......................197 24.3.1 Transport control ..................197 IMAGE STABILIZATION CONTROL ..............200 25.1 Overview ......................200 25.2 Description of control..................

  • Page 36: Outline

    Theory of Operation Ver. 1.0 Jan. 2009 1. SYSTEM CONFIGURATION OUTLINE SYSTEM CONFIGURATION bizhub C652/C552 1/2 System front view [14] [13] [12] [10] [11] A0P0F1E503DA bizhub C652/552 Local interface kit EK-604 Authentication unit: Biometric type Mount kit MK-715 *1 AU-101...
  • Page 37 1. SYSTEM CONFIGURATION Theory of Operation Ver. 1.0 Jan. 2009 2/2 System rear view [10] A0P0F1C502DA bizhub C652/552 Mount kit MK-720 Stamp unit SP-501 Key counter kit KIT-1 Fax kit FK-502 Key counter kit KIT-CF *1 Image controller IC-412 i-Option...

  • Page 38: Product Specifications

    Theory of Operation Ver. 1.0 Jan. 2009 2. PRODUCT SPECIFICATIONS PRODUCT SPECIFICATIONS Type Type Combination scanner and printer console type Copying system Electrostatic dry-powdered image transfer to plain paper Printing process Laser electrostatic printing system PC drum type OPC drum: KM-12 (OPC with high mold releasability) Scanning density Main scan direction: 600 dpi, Sub scan direction: 600 dpi Exposure lamp...

  • Page 39: Functions

    Thick 4, OHP, Post card, Envelope, Label bizhub C552: 108.00 mm/s sheet, glossy mode Copying speed for Monochrome bizhub C652: 1-sided: 65 copies/min, multi-copy cycle 2-sided: 65 copies/min (A4 or 8 x 11, plain x 11: 64 copies/min) paper, tray 1)
  • Page 40 Theory of Operation Ver. 1.0 Jan. 2009 2. PRODUCT SPECIFICATIONS Fixed zoom ratios Full size x1.000 Reduction Metric area x0.500, x0.707, x0.816, x0.866 Inch area x0.500, x0.647, x0.733, x0.785 Enlargement Metric area x1.154, x1.224, x1.414, x2.000 Inch area x1.214, x1.294, x1.545, x2.000 Zoom ratios memory Metric area 3 memories...

  • Page 41: Paper

    2. PRODUCT SPECIFICATIONS Theory of Operation Ver. 1.0 Jan. 2009 Paper Paper source (maximum tray capacity) Type Tray 1 Tray 2 Tray 3 Tray 4 Bypass tray Plain paper ❍ ❍ ❍ ❍ ❍ (64 to 90 g/m / 17 (500 sheets) (500 sheets) (150 sheets)

  • Page 42: Materials

    TN613C Toner cartridge/M 30,000 prints TN613M Toner cartridge/Y 30,000 prints TN613Y Toner cartridge/K 45,000 prints TN613K Imaging unit/C bizhub C652 135,000 prints IU612C bizhub C552 120,000 prints Imaging unit/M bizhub C652 135,000 prints IU612M bizhub C552 120,000 prints Imaging unit/Y...

  • Page 43: Print Volume

    2. PRODUCT SPECIFICATIONS Theory of Operation Ver. 1.0 Jan. 2009 Print volume • bizhub C652 Average Color print 5,500 prints/month Monochrome print 16,400 prints/month Maximum Color print 63,000 prints/month Monochrome print 187,000 prints/month Average Color print 7,400 prints/month Monochrome print...

  • Page 44: Operating Environment

    Theory of Operation Ver. 1.0 Jan. 2009 2. PRODUCT SPECIFICATIONS • bizhub C552 Power requirements Voltage: AC 100 V, 120 V, 127 V, 220-240 V Current: 100 V 15 A 110 V 15 A 120 V 16 A 127 V 16 A 230 V 10 A...

  • Page 45: Print Functions

    Windows NT4.0 SP6/2000 SP3/XP Windows Vista 32/64bit Mac OS9.2 /OSX 10.2,10.3,10.4,10.5/ OSX 10.4,10.5 intel edition Linux Scan functions Driver KONICA MINOLTA scanner driver Compatible operating Windows 2000, Windows XP/XP (incl. 64 bit) systems Scan speed 78 pages/min (A4 or 8 1/2 x 11,...

  • Page 46: Section Configuration

    Theory of Operation Ver. 1.0 Jan. 2009 3. SECTION CONFIGURATION SECTION CONFIGURATION Auto document feed section * Standard Scanner section (IR section) Paper exit section Fusing section Toner supply section Duplex section (standard) Transfer corona section Paper feed section Imaging unit section (Bypass tray) (IU section) Write section (PH section)

  • Page 47: Paper Path

    4. PAPER PATH Theory of Operation Ver. 1.0 Jan. 2009 PAPER PATH A0P0JT1C599AA...

  • Page 48: Configuration/Operation

    Theory of Operation Ver. 1.0 Jan. 2009 5. OVERALL CONFIGURATION CONFIGURATION/OPERATION OVERALL CONFIGURATION Control block diagram Scanner Inverter board section Original glass position control board CCD board Scanner Vendor relay board R G B Control panel Key counter R G B Total counter USB board...

  • Page 49: Image Creation Process

    5. OVERALL CONFIGURATION Theory of Operation Ver. 1.0 Jan. 2009 Image creation process [13] Fusing [15] Paper exit [10] Transfer belt cleaning [7] 1st transfer [9] Separation [1] Photoelectric conversion [8] 2nd transfer [2] Printer image processing [3] Photo conductor (K) [4] Photo conductor [3] Photo conductor charging (K)
  • Page 50 Theory of Operation Ver. 1.0 Jan. 2009 5. OVERALL CONFIGURATION • A DC positive voltage is applied to the backside of the paper, thereby 2nd transfer allowing the visible, developed image on the surface of the transfer belt to be transferred onto the paper. •...

  • Page 51: Image Forming Control

    5. OVERALL CONFIGURATION Theory of Operation Ver. 1.0 Jan. 2009 Image forming control Developing bias DC Y/M/C Developing bias DC K Main erase lampY/M/C Main erase lamp/K Color PC drum motor (M16) K PC drum motor (M18) Charge Y/M/C Charge K Color developing motor (M17) K developing motor (M19) BCL (+)

  • Page 52: Interface Section

    Theory of Operation Ver. 1.0 Jan. 2009 6. INTERFACE SECTION INTERFACE SECTION Configuration 6.1.1 Front side Main power switch (SW1) Total counter A0P0T5C050DA Main power switch (SW1) Total counter A0P0T5C051DA...

  • Page 53: Rear Side

    6. INTERFACE SECTION Theory of Operation Ver. 1.0 Jan. 2009 6.1.2 Rear side Upper side Lower side A0P0T5C053DA Upper side Toner filter Optional finishing connection connector A0P0T5C054DA...
  • Page 54 Theory of Operation Ver. 1.0 Jan. 2009 6. INTERFACE SECTION B. Lower side Notes • For the dehumidification heater, see “18.3.5 Dehumidification heater control”. • The power cables are constructed differently according to the model and destina- tion. Main body only AC 100V AC 110V AC 127V...

  • Page 55: Right Side

    6. INTERFACE SECTION Theory of Operation Ver. 1.0 Jan. 2009 6.1.3 Right side Front side Rear side (upper) Rear side (lower) A0P0T5C057DA...
  • Page 56 Theory of Operation Ver. 1.0 Jan. 2009 6. INTERFACE SECTION A. Front side Note • Use utmost care when unplugging or plugging the cable. If the USB cable extended from the USB terminal at the rear (lower) portion is unplugged, the USB terminal at the front side is no longer operational.
  • Page 57 6. INTERFACE SECTION Theory of Operation Ver. 1.0 Jan. 2009 B. Rear side (upper) Notes • The USB cable is extended up to the USB terminal at the front side. If the cable is unplugged from the USB terminal, therefore, the USB terminal at the front side is no longer operational.
  • Page 58 Theory of Operation Ver. 1.0 Jan. 2009 6. INTERFACE SECTION USB terminal cover USB cover sensor (PS60) A0P0T5C063DA...
  • Page 59 6. INTERFACE SECTION Theory of Operation Ver. 1.0 Jan. 2009 C. Rear side (lower) Fax kit (optional) Line extension kit (optional) TEL terminal (optional) TEL terminal (optional) LINE terminal (optional) LINE terminal (optional) A0P0T5C064DA Not used Fax kit (optional) Scanner section connection connector (standard) A0P0T5C065DA Scanner section connection...

  • Page 60: Scanner Section

    Theory of Operation Ver. 1.0 Jan. 2009 7. SCANNER SECTION SCANNER SECTION Configuration A0P0T5C058DA Original glass position Original glass moving Lens CCD unit control board (OGPCB) motor (M202) Inverter board (INVB) Glass moving unit Scanner relay board Exposure unit (REYB/SCAN) Optical cooling fan Scanner home motor (FM201)

  • Page 61: Drive

    7. SCANNER SECTION Theory of Operation Ver. 1.0 Jan. 2009 Drive Scanner motor (M201) Scanner drive cable/R Exposure unit Mirror unit Glass moving unit Original glass moving motor (M202) Scanner drive cable/F Scanner home sensor (PS201) A00JT2C003DA...

  • Page 62: Operation

    Theory of Operation Ver. 1.0 Jan. 2009 7. SCANNER SECTION Operation 7.3.1 When the power is ON 1. The exposure unit moves from the scanner standby position to the home position. 2. Exposure unit moves from the home position to the shading position (under the shading correction sheet) and stops (in scanning direction).

  • Page 63: Control When The Start Key Is Pressed

    7. SCANNER SECTION Theory of Operation Ver. 1.0 Jan. 2009 7.3.2 Control when the Start key is pressed A. Original scanning mode Original scanning mode has two types: Original cover mode and DF mode. (1) Original cover mode 1. Turning the Start key ON will turn the exposure lamp ON (at the standby position) 2.
  • Page 64 Theory of Operation Ver. 1.0 Jan. 2009 7. SCANNER SECTION (2) DF mode • The original fed by the document feeder will be read at the original DF glass for. The Exposure unit will move to the reading position and stops. The document will be read as the paper is transferred.

  • Page 65: Df Original Glass Cleaning Control

    7. SCANNER SECTION Theory of Operation Ver. 1.0 Jan. 2009 7.3.3 DF original glass cleaning control A. DF original glass cleaning • The reading lines will occur when DF original glass has stain. Shift mechanism for the DF original glass is provided to avoid this trouble. •...
  • Page 66 Theory of Operation Ver. 1.0 Jan. 2009 7. SCANNER SECTION (2) DF original glass cleaning movement performed each time after reading a sheet of original • While reading multiple originals consecutively, the DF original glass moves widely back and forth between each original reading. •...

  • Page 67: Original Scanning Area

    7. SCANNER SECTION Theory of Operation Ver. 1.0 Jan. 2009 C. Step sheet • The step sheet is provided in order to reduce the stain on the DF original glass. • It is installed to the operator side of the DF original glass in order to reduce the area orig- inal touches the glass.

  • Page 68: Original Size Detection Control

    Theory of Operation Ver. 1.0 Jan. 2009 7. SCANNER SECTION 7.3.5 Original size detection control A. Detection method • For detection of the original size, the reflective size sensors detect the length of the orig- inal while the CCD detects the width of the original. Automatic document feeder 15 degrees 15 degrees sensor (PS202)
  • Page 69 7. SCANNER SECTION Theory of Operation Ver. 1.0 Jan. 2009 B. Original size judgement NOTE • Table 1 or 2 can be selected in the service mode. Criterion Metric area & china areas Table 1 Original Main scanning width (mm) size detection ~153.0...

  • Page 70: Image Processing

    Theory of Operation Ver. 1.0 Jan. 2009 7. SCANNER SECTION C. Detection timing Validates the original length Validates the original size Original size detection sensor 1 (PS204) 15 degree sensor (PS202) Exposure lamp (FL201) Original cover sensor (RS201) A0P0T5E107DA 7.3.6 Image processing The image processing has following items.

  • Page 71: Write Section (Ph Section)

    8. WRITE SECTION (PH SECTION) Theory of Operation Ver. 1.0 Jan. 2009 WRITE SECTION (PH SECTION) Configuration PH unit A00JT2C030AA Index mirror Index board (INDEXB) Index lens G3 lens Return mirror (light source) Synthetic mirror (Y,C,M) Laser drive board/C (LDDB/C) Laser drive board/M (LDDB/M)

  • Page 72: Operation

    Theory of Operation Ver. 1.0 Jan. 2009 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 PH unit has a single-piece configuration. The PH unit has four semiconductor lasers with one laser for each four different color.

  • Page 73: Laser Exposure Process

    8. WRITE SECTION (PH SECTION) Theory of Operation Ver. 1.0 Jan. 2009 8.2.2 Laser exposure process A. Operation 1. The K laser light enters the cylindrical lens via the return mirror (light source). The Y, M, and C laser light enter the cylindrical lens via the synthetic mirror and return mirror (light source).

  • Page 74: Laser Emission Timing

    Theory of Operation Ver. 1.0 Jan. 2009 8. WRITE SECTION (PH SECTION) 8.2.3 Laser emission timing • After a print cycle has been started, when the stable rotation signals of photo conductor and polygon motor are detected, a laser ON signal is output from the printer control board.

  • Page 75: Laser Emission Stop

    8. WRITE SECTION (PH SECTION) Theory of Operation Ver. 1.0 Jan. 2009 8.2.4 Laser emission stop Emission of the laser beam is stopped if any of the following conditions is encountered dur- ing printing: • End of a print job •...

  • Page 76: Laser Emission Area

    Theory of Operation Ver. 1.0 Jan. 2009 8. WRITE SECTION (PH SECTION) 8.2.5 Laser emission area A. Main scanning direction • The print start position in the main scanning direction is determined by the main scan- ning print start signal (/HSYNC) that is output from the printer control board and the width of the paper.

  • Page 77: Color Registration Control (Color Shift Correction) System

    8. WRITE SECTION (PH SECTION) Theory of Operation Ver. 1.0 Jan. 2009 8.2.6 Color registration control (color shift correction) system • In a tandem engine, each four different color has an independent image reproduction process. Color shift may occur because of variations in part accuracy. The color registra- tion control system automatically detects color shift and correct color shift in the main and sub scanning directions.
  • Page 78 Theory of Operation Ver. 1.0 Jan. 2009 8. WRITE SECTION (PH SECTION) A. Color shift correction method • Black (K) is used as a standard of reference when other colors, yellow (Y), magenta (M), and cyan (C), are individually corrected. (1) Color shift in the main scanning direction •...

  • Page 79: Color Skew Correction Control

    8. WRITE SECTION (PH SECTION) Theory of Operation Ver. 1.0 Jan. 2009 8.2.7 Color skew correction control • Temperature may change inside the PH unit and the components can change over time. This may cause color skew problems. To prevent the problems, individual G3 lenses that correspond to Y, M, and C respectively have a color skew auto adjustment mechanism.

  • Page 80: Skew Adjustment/Skew Adjustment Reset

    Theory of Operation Ver. 1.0 Jan. 2009 8. WRITE SECTION (PH SECTION) 8.2.8 Skew adjustment/skew adjustment reset • Certain specific conditions require that a skew adjustment be performed manually. There may also be cases where the “color skew correction control” cannot be executed for some reason.

  • Page 81: Ph Unit Temperature Detection Control

    8. WRITE SECTION (PH SECTION) Theory of Operation Ver. 1.0 Jan. 2009 8.2.9 PH unit temperature detection control • Temperature change inside the PH unit may cause color shift. To prevent the problem, temperature inside the PH unit is measured by the PH thermistor. The color registration control and the color skew control start to operate when the machine detects a certain amount of temperature change between the current temperature and the one measured when the color registration was performed last time.

  • Page 82: Image Processing

    Theory of Operation Ver. 1.0 Jan. 2009 8. WRITE SECTION (PH SECTION) 8.2.10 Image processing The image processing has following items. For details, see "26. Image processing". (See: p. 207) Write section image processing block diagram • Shading correction • Line-to-line variation correction/color aberration correction •...

  • Page 83: Imaging Unit

    9. IMAGING UNIT Theory of Operation Ver. 1.0 Jan. 2009 IMAGING UNIT Configuration • The imaging unit/K is divided into two smaller units: the drum unit/K and the developing unit/K. • We call the drum unit/K and developing unit/K assembled together as the imaging unit/K. Cleaning blade Photo conductor Imaging unit/Y, M, C...

  • Page 84: Drive

    Theory of Operation Ver. 1.0 Jan. 2009 9. IMAGING UNIT Drive K PC drum motor (M18) K developing motor (M19) Color PC drum motor (M16) Color developing motor (M17) A0P0T4C003DA...

  • Page 85: Operation

    9. IMAGING UNIT Theory of Operation Ver. 1.0 Jan. 2009 Operation 9.3.1 Detection of imaging unit • Each of IU/Y, M, C has EEPROM board that detects a new IU and keeps track of the ser- vice life of the IU. A.
  • Page 86 Theory of Operation Ver. 1.0 Jan. 2009 9. IMAGING UNIT B. When life is reached • The IU life counter is used to keep track of the life of the color IU. • A warning screen appears when the life value is reached. Initiation of a new print cycle is prohibited when a predetermined number of printed pages are produced after the life value has been reached, at which time an IU replacement screen will appear.

  • Page 87: Detection Of Drum Unit/K

    9. IMAGING UNIT Theory of Operation Ver. 1.0 Jan. 2009 9.3.2 Detection of drum unit/K A. When life is reached • The drum unit life counter is used to keep track of the life of the drum unit. • A near-life condition is encountered when the consumption rate reaches about 87%, at which time a lubrication mark appears.

  • Page 88: Detection Of Developing Unit/K

    Theory of Operation Ver. 1.0 Jan. 2009 9. IMAGING UNIT 9.3.3 Detection of developing unit/K • The developing unit/K has EEPROM board that detects a new unit and keeps track of the service life of the unit. A. New developing unit detection •...

  • Page 89: Image Stabilization Control

    9. IMAGING UNIT Theory of Operation Ver. 1.0 Jan. 2009 9.3.4 Image stabilization control • An image stabilization control is automatically performed when a new color IU, develop- ing unit/K, or drum unit/K is detected. • For details, see image stabilization control.

  • Page 90: Photo Conductor Section

    Theory of Operation Ver. 1.0 Jan. 2009 10. PHOTO CONDUCTOR SECTION 10. PHOTO CONDUCTOR SECTION 10.1 Configuration Charge generating layer Charge transport layer Aluminum cylinder 4036ma2338c0 Photo conductor A0P0T2C003DA 10.2 Drive K PC drum motor (M18) Color PC drum motor (M16) Photo conductor/K Photo conductor/C Photo conductor/Y...

  • Page 91: Operation

    10. PHOTO CONDUCTOR SECTION Theory of Operation Ver. 1.0 Jan. 2009 10.3 Operation 10.3.1 Photo conductor drive mechanism • Two independent photo conductor motors, one for color and the other for monochrome, are used for the drive mechanism to suppress incorrect color registration and uneven pitch.
  • Page 92 Theory of Operation Ver. 1.0 Jan. 2009 10. PHOTO CONDUCTOR SECTION A. Photo conductor speed control • The K photo conductor drive gear has a diameter larger than that of the color photo con- ductor drive gears to enable the high-speed monochrome printing. •...
  • Page 93 10. PHOTO CONDUCTOR SECTION Theory of Operation Ver. 1.0 Jan. 2009 B. Photo conductor small amount rotation control • Humidity around the IU can produce a difference in sensitivity among different photo con- ductors. This could lead to drum memory, allowing black bands to occur in the image. •...

  • Page 94: Main Erase Lamp Control

    Theory of Operation Ver. 1.0 Jan. 2009 10. PHOTO CONDUCTOR SECTION 10.3.2 Main erase lamp control A. Main erase lamp/K control • The Drum unit/K has a main erase lamp/K located on the upstream side of the cleaning blade to improve cleaning performance. •...

  • Page 95: Photo Conductor Cleaning

    10. PHOTO CONDUCTOR SECTION Theory of Operation Ver. 1.0 Jan. 2009 10.3.3 Photo conductor cleaning • The cleaning blade is pressed up against the surface of the photo conductor, scraping residual toner off the surface (Blade abutting photo conductor in a counter direction). •...

  • Page 96: Charge Corona Section

    Theory of Operation Ver. 1.0 Jan. 2009 11. CHARGE CORONA SECTION 11. CHARGE CORONA SECTION 11.1 Configuration Serrate electrode 4038T2C027AA Photo conductor charge control plate (grid mesh) Developing unit/K, Drum unit/K IU/Y,M,C Photo conductor Photo conductor charge corona charge corona Corona Wire Cleaning Lever A00JT2C018DA Cleaning blade...

  • Page 97: Operation

    11. CHARGE CORONA SECTION Theory of Operation Ver. 1.0 Jan. 2009 11.2 Operation 11.2.1 Photo conductor charge control A. Serrate electrode • The charge corona incorporates a serrate electrode, capable of conducting charging operation centrally on the charge control plate (grid mesh), which reduces the amount of ozone produced.
  • Page 98 Theory of Operation Ver. 1.0 Jan. 2009 11. CHARGE CORONA SECTION • With the IU/Y, M, C, the charge corona is cleaned manually using the photo conductor charge corona cleaning lever incorporated in the IU. • Perform cleaning when the toner cartridge (Y, M, C) is replaced with a new one. IU/Y,M,C Photo conductor charge corona cleaning lever A00JT2C018DA...

  • Page 99: Developing Section

    12. DEVELOPING SECTION Theory of Operation Ver. 1.0 Jan. 2009 12. DEVELOPING SECTION 12.1 Configuration < K developing section > < Color developing section > Doctor blade Developing roller Doctor blade Developing roller A0P0T4C007DA 4037T2C513AA Supply/agitating/ Supply/agitating/ conveying screws conveying screws K PC drum motor (M18) K developing motor (M19) Color PC drum motor...

  • Page 100: Drive

    Theory of Operation Ver. 1.0 Jan. 2009 12. DEVELOPING SECTION 12.2 Drive K PC drum motor (M18) K developing motor (M19) Color PC drum motor (M16) Photo conductor/K Developing roller Color developing motor (M17) Photo conductor/Y A0P0T4C008DA Supply/agitating/ conveying screws...

  • Page 101: Operation

    12. DEVELOPING SECTION Theory of Operation Ver. 1.0 Jan. 2009 12.3 Operation 12.3.1 Developer flow A. Developing unit/K 1. Toner supplied from the front end of the developing unit is fed to the lower screw. It is then fed to the rear of the unit, while being mixed with developer and electrically charged by the Supply/Agitating/Conveying Screws.
  • Page 102 Theory of Operation Ver. 1.0 Jan. 2009 12. DEVELOPING SECTION B. Imaging unit/Y, M, C 1. Toner supplied from the front end of the developing unit is fed to the lower screw. It is then fed to the rear of the unit, while being mixed with developer and electrically charged by the Supply/Agitating/Conveying Screws.

  • Page 103: Auto Refining Developing System

    12. DEVELOPING SECTION Theory of Operation Ver. 1.0 Jan. 2009 12.3.2 Auto refining developing system • The machine incorporates the auto refining developing system for maintaining the devel- oper at a predetermined charge state. • Carrier is mixed with toner in the toner cartridge and the developing unit is supplied with the carrier together with the toner.

  • Page 104: Developing Bias

    Theory of Operation Ver. 1.0 Jan. 2009 12. DEVELOPING SECTION 12.3.3 Developing bias • The developing bias voltage (Vb) is applied to the developing roller so that an adequate amount of toner is attracted onto the surface of the photo conductor can be controlled. •...

  • Page 105: Toner Scattering Prevention

    12. DEVELOPING SECTION Theory of Operation Ver. 1.0 Jan. 2009 12.3.4 Toner scattering prevention • To prevent the image and machine interior from being dirtied, a toner filter is installed at the rear of the machine, and the toner suction fan motor that work together sucks toner particles rising up during development.

  • Page 106: Developing Cooling Control

    Theory of Operation Ver. 1.0 Jan. 2009 12. DEVELOPING SECTION 12.3.5 Developing cooling control • Removes ozone produced by the drum charge corona. • Only air drawn by the ozone ventilation fan motor is discharged out of the machine after the ozone filter removes ozone from it.

  • Page 107: Toner Density Control

    12. DEVELOPING SECTION Theory of Operation Ver. 1.0 Jan. 2009 12.3.6 Toner density control A. Toner density detection • The magnetic TCR sensor is mounted on the underside of each of the developing sec- tions. Each of these TCR sensors detects toner-to-carrier ratio (T/C) of the developer. The reading is used for determining the amount of toner supplied.

  • Page 108: Toner Supply Section

    Theory of Operation Ver. 1.0 Jan. 2009 13. TONER SUPPLY SECTION 13. TONER SUPPLY SECTION 13.1 Configuration Toner cartridge/Y,M,C A0P0T2C008DA Toner cartridge/K Conveyance screw /K Conveyance screw /Y, M, C Toner cartridge/K Toner hopper/K Toner cartridge/Y, M, C Toner hopper/Y, M, C A0P0T4C014DA...

  • Page 109: Drive

    13. TONER SUPPLY SECTION Theory of Operation Ver. 1.0 Jan. 2009 13.2 Drive Toner cartridge motor C/K (M14) Toner cartridge motor Y/M (M13) A0P0T4C015DA...

  • Page 110: Operation

    Theory of Operation Ver. 1.0 Jan. 2009 13. TONER SUPPLY SECTION 13.3 Operation 13.3.1 Replenishing the toner hopper with toner A. Toner replenishing control • In the toner replenishing step from the toner cartridge to the toner hopper, a single toner supply motor is turned either forward or backward to supply toner of two different colors.
  • Page 111 13. TONER SUPPLY SECTION Theory of Operation Ver. 1.0 Jan. 2009 • A reed switch is used as the toner empty sensor/Y, M, C, while a piezo sensor is used as the toner empty sensor/K. Toner empty sensor/Y,M,C (RS/ Toner empty sensor/K (PZS/K) Y,RS/M,RS/C) Toner supply motors (M9,10,11,12)

  • Page 112: Replenishing The Developing Unit With Toner

    Theory of Operation Ver. 1.0 Jan. 2009 13. TONER SUPPLY SECTION 13.3.2 Replenishing the developing unit with toner A. Toner replenishing control • Toner, which has been supplied from the toner cartridge to the toner hopper, is replen- ished to the developing unit by the toner supply motors that independently operate for Y, M, C, and K •...

  • Page 113: Toner Cartridge Detection

    13. TONER SUPPLY SECTION Theory of Operation Ver. 1.0 Jan. 2009 13.3.3 Toner cartridge detection • Individual cartridge detection is controlled by means of accessing the toner cartridge set board when the front upper door is closed or the main power switch is turned ON to determine whether a specific toner cartridge is loaded or not.
  • Page 114 Theory of Operation Ver. 1.0 Jan. 2009 13. TONER SUPPLY SECTION B. Toner cartridge empty control • After the toner cartridge empty condition is detected, if the toner hopper toner empty sensor detects toner empty, the toner cartridge empty warning is displayed. C.

  • Page 115: Toner Spill Prevention Shutter

    13. TONER SUPPLY SECTION Theory of Operation Ver. 1.0 Jan. 2009 13.3.5 Toner spill prevention shutter • To prevent toner from being spilled when the toner cartridge is removed from the machine, there is a shutter mechanism provided. When the toner cartridge is installed in the machine, the shutter opens.

  • Page 116: St Image Transfer Section

    Theory of Operation Ver. 1.0 Jan. 2009 14. 1st IMAGE TRANSFER SECTION 14. 1st IMAGE TRANSFER SECTION 14.1 Configuration A0P0T2C013DA 1st Image transfer roller/C 1st Image transfer roller/Y 1st Image transfer roller/M 1st Image transfer roller/K Cleaning brush 1 Cleaning brush 2 Transfer belt drive roller A0P0T5C037DA 1st Image transfer pressure/...

  • Page 117: Drive

    14. 1st IMAGE TRANSFER SECTION Theory of Operation Ver. 1.0 Jan. 2009 14.2 Drive Transfer belt motor (M1) Cleaner motor (M38) Transfer belt A0P0T5C092DA 1st Image transfer roller/K 1st Image transfer roller/C 1st Image transfer roller/Y 1st image transfer pressure retraction motor (M21) 1st Image transfer roller/M A00JT2C041DA...

  • Page 118: Operation

    Theory of Operation Ver. 1.0 Jan. 2009 14. 1st IMAGE TRANSFER SECTION 14.3 Operation 14.3.1 1st image transfer roller control • The machine is provided with a mechanism that presses the 1st image transfer rollers up against the inside of the transfer belt during the 1st image transfer stage. The 1st image transfer pressure retraction motor provides the drive for this operation.
  • Page 119 14. 1st IMAGE TRANSFER SECTION Theory of Operation Ver. 1.0 Jan. 2009 • The pressure operation starts when a print cycle starts, and the retraction operation starts when the print cycle completes. Start key ON Paper Moves Past 2nd Image transfer roller Transfer belt motor (M1) 1st Image transfer pressure retraction motor (M21)
  • Page 120 Theory of Operation Ver. 1.0 Jan. 2009 14. 1st IMAGE TRANSFER SECTION A. Retraction roller control • In addition to the change of the pressure position of the 1st image transfer roller, the machine moves the color retraction roller or the K retraction roller up and down to change the position of the image transfer on the surface of the transfer belt depending on the print mode of each job.

  • Page 121: Pressure/Retraction Control By Print Mode

    14. 1st IMAGE TRANSFER SECTION Theory of Operation Ver. 1.0 Jan. 2009 14.3.2 Pressure/retraction control by print mode (1) Black • The pressure position of the image transfer roller/Y, M, C in the monochrome mode is where the photo conductor/Y, M, C leaves the transfer belt, while that of the image trans- fer roller/K is where the photo conductor/K is in contact with the transfer belt.

  • Page 122: Acs

    Theory of Operation Ver. 1.0 Jan. 2009 14. 1st IMAGE TRANSFER SECTION 14.3.3 • For monochrome printing in the ACS mode, the pressure/retraction operation of the 1st image transfer roller is controlled according to the number of monochrome originals that continue during multiple copies.
  • Page 123 14. 1st IMAGE TRANSFER SECTION Theory of Operation Ver. 1.0 Jan. 2009 • Number of multiple copies of monochrome originals when the paper feed speed is 120 mm/s (Thick stock 1, Thick stock 1+, Thick stock 2, Thick stock 3, Thick stock 4, Special paper).
  • Page 124 Theory of Operation Ver. 1.0 Jan. 2009 14. 1st IMAGE TRANSFER SECTION • Number of multiple copies of monochrome originals when the paper feed speed is 108 mm/s (Thick stock 1, Thick stock 1+, Thick stock 2, Thick stock 3, Thick stock 4, Special paper).
  • Page 125 14. 1st IMAGE TRANSFER SECTION Theory of Operation Ver. 1.0 Jan. 2009 • ACS control operates only after the number of multi-copies for monochrome original is counted. “The pressure/retraction control for ACS mode” will not be properly executed with only one sheet of print job, since on the first copy, the control can be performed only for where the original is read and counted.

  • Page 126: Transfer Belt Cleaning

    Theory of Operation Ver. 1.0 Jan. 2009 14. 1st IMAGE TRANSFER SECTION 14.3.4 Transfer belt cleaning • To scrape residual toner off the surface of the transfer belt, the transfer belt is provided with cleaning brushes 1 and 2. • Cleaning brush 1/2 is a rotary brush. To enhance its ability to scrape residual toner off the surface of the transfer belt, the brush is turned in a direction opposite to that of the transfer belt.

  • Page 127: Nd Image Transfer Section

    15. 2nd IMAGE TRANSFER SECTION Theory of Operation Ver. 1.0 Jan. 2009 15. 2nd IMAGE TRANSFER SECTION 15.1 Configuration 2nd Image transfer roller A0P0T4C019DA A0P0T2C015DA Temperature/humidity sensor (TEM/HUMS) A0P0T2C016DA 2nd Image transfer roller Pressure welding alienation sensor (PS50) 2nd image transfer pressure retraction motor (M3) IDC registration sensor/R (IDCS/R)

  • Page 128: Drive

    Theory of Operation Ver. 1.0 Jan. 2009 15. 2nd IMAGE TRANSFER SECTION 15.2 Drive 2nd Image transfer roller Pressure welding alienation sensor (PS50) 2nd image transfer pressure retraction motor (M3) IDC registration sensor/R (IDCS/R) Shutter Pressure lever IDC registration sensor/F (IDCS/F) A00JT2C043DA...

  • Page 129: Operation

    15. 2nd IMAGE TRANSFER SECTION Theory of Operation Ver. 1.0 Jan. 2009 15.3 Operation 15.3.1 2nd image transfer roller control A. 2nd image transfer roller pressure/retraction • The 2nd image transfer roller has a pressure/retraction mechanism which presses to and retracts from the transfer belt so the patterns made on the transfer belt except by copy- ing, such as detection pattern during image stabilization operation, will not affect the 2nd image transfer roller.

  • Page 130: 2Nd Image Transfer Control

    Theory of Operation Ver. 1.0 Jan. 2009 15. 2nd IMAGE TRANSFER SECTION • The pressure operation starts when a print cycle starts, and the retraction operation starts when the print cycle completes. Start key ON Paper moves past 2nd Image transfer roller Transfer belt motor (M1) 2nd Image transfer pressure retraction motor (M3)

  • Page 131: 2Nd Image Transfer Roller Cleaning

    15. 2nd IMAGE TRANSFER SECTION Theory of Operation Ver. 1.0 Jan. 2009 15.3.3 2nd image transfer roller cleaning • To remove residual toner off the surface of the 2nd Image transfer roller, a +/- DC bias is applied alternately to the roller, thereby moving the residual toner to the surface of the transfer belt.

  • Page 132: Paper Separation Control

    Theory of Operation Ver. 1.0 Jan. 2009 15. 2nd IMAGE TRANSFER SECTION 15.3.4 Paper separation control • To neutralize any charge potential left in the paper which has undergone the 2nd image transfer stage, a charge neutralizing needle is installed to the guide plate after the 2nd Image Transfer Roller.

  • Page 133: Sensor Protection

    15. 2nd IMAGE TRANSFER SECTION Theory of Operation Ver. 1.0 Jan. 2009 15.3.5 Sensor protection • The IDC sensor can be contaminated with toner since it is located under the transfer belt. There is a shutter mechanism provided for the sensor to prevent it from being contami- nated.

  • Page 134: Toner Collecting Section

    Theory of Operation Ver. 1.0 Jan. 2009 16. TONER COLLECTING SECTION 16. TONER COLLECTING SECTION 16.1 Configuration A0P0T2C020DA Transfer belt toner collecting screw Drum unit/K toner collecting screw Waste toner Imaging unit/Y, M, C toner collecting screw Developing unit/K Agitating screw developer collecting section A0P0T4C020DA...

  • Page 135: Drive

    16. TONER COLLECTING SECTION Theory of Operation Ver. 1.0 Jan. 2009 16.2 Drive Transfer belt toner collecting screw Cleaner motor (M38) Toner collecting roller K PC drum motor (M18) Color PC drum motor (M16) A0P0T4C021DA Waste toner agitating motor (M20)

  • Page 136: Operation

    Theory of Operation Ver. 1.0 Jan. 2009 16. TONER COLLECTING SECTION 16.3 Operation 16.3.1 Toner collecting path • Toner collected by the cleaning brush of the transfer belt and waste toner on each of the photo conductors are conveyed by the corresponding toner collecting screws to the waste toner box.

  • Page 137: Agitation Control In Waste Toner Box

    16. TONER COLLECTING SECTION Theory of Operation Ver. 1.0 Jan. 2009 16.3.2 Agitation control in waste toner box • In order to avoid detecting an incorrect waste toner amount, two agitating screws are installed in the waste toner box so that waste toner and developer can build up evenly in the box.

  • Page 138: Waste Toner Full Detection

    Theory of Operation Ver. 1.0 Jan. 2009 16. TONER COLLECTING SECTION 16.3.4 Waste Toner full detection • An interrupter-type photosensor is used to detect waste toner. When the sensor is blocked for a given period of time, the machine determines that the waste toner box is nearly full of waste toner.
  • Page 139 16. TONER COLLECTING SECTION Theory of Operation Ver. 1.0 Jan. 2009 • After the waste toner box has been replaced and the waste toner full sensor has been unblocked for a given period of time, the machine cancels the copying-disabled condi- tion, while at the same time automatically clearing the counter exclusive.

  • Page 140: Paper Feed Section (Tray1, Tray2)

    Theory of Operation Ver. 1.0 Jan. 2009 17. PAPER FEED SECTION (TRAY1, TRAY2) 17. PAPER FEED SECTION (TRAY1, TRAY2) 17.1 Configuration 17.1.1 Major components • Tray1 and 2 have same sensor position. A00JT2C277AA Tray1 upper limit sensor (PS6) Tray1 vertical transport sensor (PS4) Tray1 paper feed sensor (PS5) Tray1 near empty sensor (PS3) Tray1 device detection sensor (PS1)

  • Page 141: Layout Of Sensors And Rollers

    17. PAPER FEED SECTION (TRAY1, TRAY2) Theory of Operation Ver. 1.0 Jan. 2009 17.1.2 Layout of sensors and rollers Timing roller Timing roller sensor (PS38) Tray1 vertical transport sensor (PS4) Tray1 vertical transport roller Tray1 paper feed roller First sheet of paper Second sheet of paper Tray2 vertical transport sensor (PS12)

  • Page 142: Drive

    Theory of Operation Ver. 1.0 Jan. 2009 17. PAPER FEED SECTION (TRAY1, TRAY2) 17.2 Drive • Drive parts are arranged in the same way in tray1 and 2. • Take-up motor drives the tray1 and 2 paper feed rollers. • Each paper feed roller has a clutch that is turned ON when it needs to be driven. Tray1 Tray1 vertical transport motor (M5) Take-up motor (M22)

  • Page 143: Operation

    17. PAPER FEED SECTION (TRAY1, TRAY2) Theory of Operation Ver. 1.0 Jan. 2009 17.3 Operation 17.3.1 Up/down control A. Up operation • Paper lifting plate B is located under paper lifting plate A. • The lifting plate drive shaft of the tray1(2) lift-up motor is connected to paper lifting plate •...
  • Page 144 Theory of Operation Ver. 1.0 Jan. 2009 17. PAPER FEED SECTION (TRAY1, TRAY2) C. Operation timing (1) When the tray is slid in • When the tray is slid into the machine, the tray1(2) device detection sensor is blocked. The machine then determines that the tray is slid into position. •...

  • Page 145: Paper Feed Control

    17. PAPER FEED SECTION (TRAY1, TRAY2) Theory of Operation Ver. 1.0 Jan. 2009 17.3.2 Paper feed control • Tray1 and Tray2 are controlled in the same control procedure. A. Pick-up control • The take-up motor is energized by the print start signal. •...
  • Page 146 Theory of Operation Ver. 1.0 Jan. 2009 17. PAPER FEED SECTION (TRAY1, TRAY2) C. Separation control • The paper separator roller is driven via a torque limiter in the direction opposite the paper transport direction. • The paper separator roller is pressed against the paper feed roller by the operating pres- sure generated by pressure of the spring and torque of the torque limiter.
  • Page 147 17. PAPER FEED SECTION (TRAY1, TRAY2) Theory of Operation Ver. 1.0 Jan. 2009 D. Paper transport control • The tray1(2) vertical transport motor is energized after the lapse of a predetermined period of time after the print start signal. • The driving force of the tray1(2) vertical transport motor is transmitted to the tray1(2) ver- tical transport roller.
  • Page 148 Theory of Operation Ver. 1.0 Jan. 2009 17. PAPER FEED SECTION (TRAY1, TRAY2) E. Paper feed speed reduction control • When paper reaches the tray1(2) paper feed sensor, if the interval between the paper and the preceding paper is short, the take-up motor speed is reduced temporarily to adjust the paper interval to the proper one.
  • Page 149 17. PAPER FEED SECTION (TRAY1, TRAY2) Theory of Operation Ver. 1.0 Jan. 2009 F. Downstream exit control during multi-print cycle • The following terms are used for convenience’ sake throughout this chapter. Upstream: Refers to the source side of paper supply relative to the paper feeding direc- tion Downstream: Refers to the destination side of paper transport relative to the paper feed- ing direction...
  • Page 150 Theory of Operation Ver. 1.0 Jan. 2009 17. PAPER FEED SECTION (TRAY1, TRAY2) (3) 1-sided printing Operation 1 • In consecutive 1-sided printing, 4th sheet causes a jam- ming at the paper feed tray section. Sheet before a 1-sided image transfer •...
  • Page 151 17. PAPER FEED SECTION (TRAY1, TRAY2) Theory of Operation Ver. 1.0 Jan. 2009 (4) 2-sided printing Operation 1 • In consecutive 2-sided printing, 5th sheet causes a jam- Sheet before a 1-sided image transfer ming at the paper feed tray section. Sheet after a 1-sided image transfer •...

  • Page 152: Paper Size Detection Control

    Theory of Operation Ver. 1.0 Jan. 2009 17. PAPER FEED SECTION (TRAY1, TRAY2) 17.3.3 Paper size detection control A. Main scanning direction • The size in the main scanning direction is detected based on the combination of tray1(2) CD paper size sensor/1 and tray1(2) CD paper size sensor/2 being unblocked or blocked.
  • Page 153 17. PAPER FEED SECTION (TRAY1, TRAY2) Theory of Operation Ver. 1.0 Jan. 2009 C. Sheet size determination • Combination of the width of the main scanning and the length of the sub scanning will decide a sheet size. Ditection switch/ Paper size detect board/1 (PSDTB/1) Tray1 CD paper size Tray1 CD paper size...

  • Page 154: Remaining Paper Detection Control

    Theory of Operation Ver. 1.0 Jan. 2009 17. PAPER FEED SECTION (TRAY1, TRAY2) 17.3.4 Remaining paper detection control A. Paper near-empty detection • The tray1(2) near empty sensor detects a paper near-empty condition of the tray. • As paper is consumed, the position of the near empty detection actuator provided at the lifting plate drive shaft of the lift-up motor is raised.

  • Page 155: Paper Temperature Detection Control

    17. PAPER FEED SECTION (TRAY1, TRAY2) Theory of Operation Ver. 1.0 Jan. 2009 C. Remaining paper level display • The amount of remaining paper is indicated by the LED on the right side of each tray and by the screen of the control panel. •...

  • Page 156: Paper Feed Section (Tray3, Tray4)

    Theory of Operation Ver. 1.0 Jan. 2009 18. PAPER FEED SECTION (TRAY3, TRAY4) 18. PAPER FEED SECTION (TRAY3, TRAY4) 18.1 Configuration 18.1.1 Major components (tray3) Horizontal transport section (upper section) A0P0T5C073DA Tray3 paper feed section Tray3 upper limit sensor (PS20) Tray3 paper empty sensor (PS19) Tray3 paper feed sensor (PS21) Tray3 near empty sensor (PS22)

  • Page 157: Major Components (Tray3 Horizontal Transport Section)

    18. PAPER FEED SECTION (TRAY3, TRAY4) Theory of Operation Ver. 1.0 Jan. 2009 18.1.2 Major components (tray3 horizontal transport section) A0P0T5C072DA Tray4 paper feed section Tray3 horizontal transport section Horizontal transport Vertical transport motor (M26) clutch/1 (CL3) Horizontal transport roller 2 Transport motor (M25) A0P0T5C011DA Horizontal transport...

  • Page 158: Major Components (Tray4)

    Theory of Operation Ver. 1.0 Jan. 2009 18. PAPER FEED SECTION (TRAY3, TRAY4) 18.1.3 Major components (tray4) A00JT2C276AA Tray4 upper limit sensor (PS25) Tray4 paper empty sensor (PS24) Tray4 near empty sensor (PS27) Tray4 paper feed sensor (PS26) A00JT2C294AA...

  • Page 159: Layout Of Sensors And Rollers

    18. PAPER FEED SECTION (TRAY3, TRAY4) Theory of Operation Ver. 1.0 Jan. 2009 18.1.4 Layout of sensors and rollers Timing roller Timing roller sensor (PS38) OHP detect sensor (PS40) Tray1 vertical Tray1 vertical transport sensor (PS4) transport roller Tray2 vertical Tray2 vertical transport sensor (PS12) transport roller Horizontal transport sensor (PS29)

  • Page 160: Drive

    Theory of Operation Ver. 1.0 Jan. 2009 18. PAPER FEED SECTION (TRAY3, TRAY4) 18.2 Drive 18.2.1 Tray3 Tray3 transport clutch (CL6) Transport motor (M25) Tray3 paper feed clutch (CL5) Tray3 paper feed roller Tray3 take-up axis Coupling A00JT2C301AA Tray3 lift-up motor (M23) Tray3 18.2.2 Tray3 horizontal transport...

  • Page 161: Tray4

    18. PAPER FEED SECTION (TRAY3, TRAY4) Theory of Operation Ver. 1.0 Jan. 2009 18.2.3 Tray4 Tray4 paper feed clutch (CL7) Vertical transport motor (M26) Tray4 transport roller Transport motor (M25) Tray4 paper feed roller Coupling Tray4 lift-up motor (M24) A00JT2C295AA Tray4 Tray4 take-up axis...

  • Page 162: Operation

    Theory of Operation Ver. 1.0 Jan. 2009 18. PAPER FEED SECTION (TRAY3, TRAY4) 18.3 Operation 18.3.1 Up/down control • The same control procedure applies to tray3 and tray4. A. Up operation • A lifting cable is connected to the paper lifting plate and the paper plate is held in the hor- izontal position by the take-up axis.
  • Page 163 18. PAPER FEED SECTION (TRAY3, TRAY4) Theory of Operation Ver. 1.0 Jan. 2009 C. Operation timing (1) When the tray is slid in • When the tray is slid in, the drawer connector of tray3(4) is connected. The machine then determines that the tray is slid in position.
  • Page 164 Theory of Operation Ver. 1.0 Jan. 2009 18. PAPER FEED SECTION (TRAY3, TRAY4) (2) During printing • As paper is consumed, the pick-up roller gradually lowers and the tray3(4) upper limit sensor is unblocked. • Determining that the tray3(4) upper limit sensor is unblocked, the machine lets the tray3(4) lift-up motor rotate to start the up operation of the paper plate.

  • Page 165: Paper Feed Control

    18. PAPER FEED SECTION (TRAY3, TRAY4) Theory of Operation Ver. 1.0 Jan. 2009 18.3.2 Paper Feed control A. Pick-up control (tray3) • The transport motor is energized by the print start signal. • The tray3 paper feed clutch is energized after the lapse of a predetermined period of time after the print start signal.
  • Page 166 Theory of Operation Ver. 1.0 Jan. 2009 18. PAPER FEED SECTION (TRAY3, TRAY4) B. Pick-up control (tray4) • The transport motor is energized by the print start signal. • The tray4 paper feed clutch is energized after the lapse of a predetermined period of time after the print start signal.
  • Page 167 18. PAPER FEED SECTION (TRAY3, TRAY4) Theory of Operation Ver. 1.0 Jan. 2009 C. Separation control • The paper separator roller is driven via a torque limiter in the direction opposite the paper transport direction. • The paper separator roller is pressed against the paper feed roller by the operating pres- sure generated by pressure of the spring and torque of the torque limiter.
  • Page 168 Theory of Operation Ver. 1.0 Jan. 2009 18. PAPER FEED SECTION (TRAY3, TRAY4) D. Horizontal transport control (tray3) • The transport motor is energized after the lapse of a predetermined period of time after the print start signal. • The horizontal transport clutch is energized after the lapse of a predetermined period of time after the transport motor has been energized.
  • Page 169 18. PAPER FEED SECTION (TRAY3, TRAY4) Theory of Operation Ver. 1.0 Jan. 2009 F. Operation timing (1) The tray3 Plain paper: OHP detection sensor ON * When there is no preceding paper Thick paper: Timing roller sensor ON Timing motor ON Start key ON Transport motor (M25) Tray3 paper feed clutch (CL5)
  • Page 170 Theory of Operation Ver. 1.0 Jan. 2009 18. PAPER FEED SECTION (TRAY3, TRAY4) (2) The tray4 Plain paper: OHP detection sensor ON * When there is no preceding paper Thick paper: Timing roller sensor ON Timing motor Start key ON Transport motor (M25) Tray4 paper feed clutch (CL7) Tray4 paper feed sensor (PS26)

  • Page 171: Paper Size Detection Control

    18. PAPER FEED SECTION (TRAY3, TRAY4) Theory of Operation Ver. 1.0 Jan. 2009 18.3.3 Paper size detection control • Tray3 and 4 don’t have paper size detection function. • To set a different paper size, press keys as follows. [Service mode] − [System setting 2] − [LCC size setting] •...

  • Page 172: Remaining Paper Detection Control

    Theory of Operation Ver. 1.0 Jan. 2009 18. PAPER FEED SECTION (TRAY3, TRAY4) 18.3.4 Remaining paper detection control A. Paper near-empty detection • The tray3(4) near empty sensor detects a paper near-empty condition of the tray. • As the amount of paper becomes small during printing, the paper lifting plate is raised. (See “A.
  • Page 173 18. PAPER FEED SECTION (TRAY3, TRAY4) Theory of Operation Ver. 1.0 Jan. 2009 C. Paper empty detection (tray4) • The tray4 paper empty sensor detects a paper empty condition of the tray. • When the empty detection actuator is raised to a position at which it blocks the tray4 paper empty sensor, the machine detects a paper empty condition.
  • Page 174 Theory of Operation Ver. 1.0 Jan. 2009 18. PAPER FEED SECTION (TRAY3, TRAY4) E. Display of paper supply level • The amount of remaining paper is indicated by the LED on the right side of each tray and by the screen of the control panel. •...

  • Page 175: Dehumidification Heater Control

    18. PAPER FEED SECTION (TRAY3, TRAY4) Theory of Operation Ver. 1.0 Jan. 2009 18.3.5 Dehumidification heater control • The machine has two dehumidification heaters mounted on its frame (heaters for tray3 and tray4 come as standard). • When energized, the dehumidification heater generates heat to dehumidify the inside of the tray and the machine.

  • Page 176: Detection Of Tray3/4 Slid Out/In

    Theory of Operation Ver. 1.0 Jan. 2009 18. PAPER FEED SECTION (TRAY3, TRAY4) 18.3.6 Detection of tray3/4 slid out/in • The connection state of the drawer connection located in the rear of the tray determines whether the tray3(4) is slid out or in. •...

  • Page 177: Detection Of Horizontal Transport Unit Slid Out/In

    18. PAPER FEED SECTION (TRAY3, TRAY4) Theory of Operation Ver. 1.0 Jan. 2009 18.3.7 Detection of horizontal transport unit slid out/in • The horizontal transport sensor detects the horizontal transport unit that is being slid out or in. • By sliding out the horizontal transport unit, the horizontal transport guide for clearing paper misfeed from the horizontal transport unit can be opened.

  • Page 178: Paper Feed Section (Bypass Tray)

    Theory of Operation Ver. 1.0 Jan. 2009 19. PAPER FEED SECTION (BYPASS TRAY) 19. PAPER FEED SECTION (BYPASS TRAY) 19.1 Configuration Paper side guide plate A00JT2C274AA Bypass sub tray Bypass paper width detection resistor (VR) Bypass paper empty Bypass sub tray set sensor (PS34) sensor (PS37) Bypass paper...

  • Page 179: Drive

    19. PAPER FEED SECTION (BYPASS TRAY) Theory of Operation Ver. 1.0 Jan. 2009 19.2 Drive Bypass tray up down motor (M28) Bypass paper lower sensor (PS36) Bypass paper limit sensor (PS35) Paper lifting plate Bypass paper feed motor (M27) Bypass paper feed motor (M27) Bypass tray separator roller Bypass paper feed roller A00JT2C283AA...

  • Page 180: Operation

    Theory of Operation Ver. 1.0 Jan. 2009 19. PAPER FEED SECTION (BYPASS TRAY) 19.3 Operation 19.3.1 Bypass paper lifting motion control A. Up operation • The bypass tray up down motor rotates forward to drive the lifting gear, which raises the paper lifting plate to the paper feed position.

  • Page 181: Paper Feed Control

    19. PAPER FEED SECTION (BYPASS TRAY) Theory of Operation Ver. 1.0 Jan. 2009 Occurrence of the event that Start key ON moves to standby position Standby Paper feeding position position Normal rotation Bypass tray up down motor (M28) Inverse rotation Bypass paper upper limit sensor (PS35) Bypass paper lower limit sensor (PS36) A0P0T5E115DA...
  • Page 182 Theory of Operation Ver. 1.0 Jan. 2009 19. PAPER FEED SECTION (BYPASS TRAY) B. Separation control • The paper separator roller is driven via a torque limiter in the direction opposite the paper transport direction. • The paper separator roller is pressed against the paper feed roller by the operating pres- sure generated by pressure of the spring and torque of the torque limiter.

  • Page 183: Paper Size Detection Control

    19. PAPER FEED SECTION (BYPASS TRAY) Theory of Operation Ver. 1.0 Jan. 2009 19.3.3 Paper size detection control A. Main scanning direction • The paper size in the main scanning direction is detected with 10-bit digital data detected by the bypass paper width detection resistor. •...
  • Page 184 Theory of Operation Ver. 1.0 Jan. 2009 19. PAPER FEED SECTION (BYPASS TRAY) C. Sheet size determination • Combination of the width of the main scanning and the length of the sub scanning will decide a sheet size. Metric area Bypass paper width detection Multi FD size Multi FD size...
  • Page 185 19. PAPER FEED SECTION (BYPASS TRAY) Theory of Operation Ver. 1.0 Jan. 2009 Inch area Bypass paper width detection Multi FD size Multi FD size Multi FD size resistor Paper detection size sensor/1 sensor/2 sensor/3 Width (mm) 80 to less than 115 115 to 144 inclusive ×...
  • Page 186 Theory of Operation Ver. 1.0 Jan. 2009 19. PAPER FEED SECTION (BYPASS TRAY) 19.3.4 Remaining paper detection control A. Paper near-empty control • The bypass tray is not mounted with any near-empty detection mechanism. B. Paper empty control • The bypass paper empty sensor detects a paper empty condition in the bypass tray. •...
  • Page 187 19. PAPER FEED SECTION (BYPASS TRAY) Theory of Operation Ver. 1.0 Jan. 2009 19.3.5 Detection of bypass unit opened/closed • The bypass unit is equipped with an open/close mechanism that facilitates misfeed clear- ing procedure and access to the tray1 paper feed part. •...
  • Page 188 Theory of Operation Ver. 1.0 Jan. 2009 19. PAPER FEED SECTION (BYPASS TRAY) 19.3.6 Detection of bypass sub tray extended/retracted • The bypass sub tray set sensor prevents erroneous detection by multi FD size sensors 2 and 3 when the bypass sub tray is retracted. •...

  • Page 189: Vertical Transport Section

    20. VERTICAL TRANSPORT SECTION Theory of Operation Ver. 1.0 Jan. 2009 20. VERTICAL TRANSPORT SECTION 20.1 Configuration Timing roller Timing roller sensor (PS38) Actuator Registration motor OHP detectinon sensor (PS40) (M2) OHP detection sensor Tray1 vertical transport motor (reflection unit) (PS40) (M5) Tray1 Tray1 Tray1 vertical...
  • Page 190 Theory of Operation Ver. 1.0 Jan. 2009 20. VERTICAL TRANSPORT SECTION 20.2 Drive Registration motor (M2) Timing roller OHP detection sensor (PS40) Timing roller sensor (PS38) Tray1 vertical transport sensor (PS4) Tray1 paper feed Tray1 vertical transport roller section Tray1 paper feed sensor (PS5) Tray1 paper feed roller Paper feed motor (M22)
  • Page 191 20. VERTICAL TRANSPORT SECTION Theory of Operation Ver. 1.0 Jan. 2009 20.3 Operation 20.3.1 Vertical transport control • The vertical transport section transports paper fed from tray1, 2, 3, or 4 onto the registra- tion section. • The paper fed from tray1 is transported onto the registration section by the tray 1 vertical transport roller.
  • Page 192 Theory of Operation Ver. 1.0 Jan. 2009 20. VERTICAL TRANSPORT SECTION B. Tray2 vertical transport roller • The tray2 vertical transport roller starts rotating after the lapse of a predetermined period of time after the print start signal. • The tray2 vertical transport sensor located downstream of the tray2 vertical transport roller along the paper path detects the leading edge of the paper that has moved past the tray2 vertical transport roller.

  • Page 193: Registration Section

    21. REGISTRATION SECTION Theory of Operation Ver. 1.0 Jan. 2009 21. REGISTRATION SECTION 21.1 Configuration 2nd image transfer roller Timing roller A0P0T5C094DA 21.2 Drive IDC registration sensor/R (IDCS/R) Registration motor (M2) Timing roller Timing roller sensor (PS38) OHP detection sensor (PS40) (Reflection unit) Tray1 vertical trans- IDC registration sensor/F...
  • Page 194 Theory of Operation Ver. 1.0 Jan. 2009 21. REGISTRATION SECTION 21.3 Operation 21.3.1 Registration control • The registration motor is connected to the timing roller. When the registration motor is energized, therefore, the timing roller is rotated. • The paper will create a loop between the tray 1 vertical transport roller (or ADU transport roller 4) and the regist motor when the paper is being conveyed in order to correct the skew.
  • Page 195 21. REGISTRATION SECTION Theory of Operation Ver. 1.0 Jan. 2009 21.3.2 OHP detection • OHP detection sensor checks to prevent printing on the paper other than OHP. • OHP detection will be performed after paper made the loop at the timing roller. When the OHP detection shows the different result from the setting on the operation panel, printing will stop to display “Error.”...
  • Page 196 Theory of Operation Ver. 1.0 Jan. 2009 21. REGISTRATION SECTION 21.3.3 Paper transport speed control • It controls the timing the paper reaches to the timing roller sensor. A. Operation • The tray1 vertical transport roller, the tray2 vertical transport roller and the intermediate roller may speed up, slow down or stop temporarily during paper transportation in order to adjust the paper interval.

  • Page 197: Fusing Section

    22. FUSING SECTION Theory of Operation Ver. 1.0 Jan. 2009 22. FUSING SECTION 22.1 Configuration IH coil unit Heating roller Heating roller temperature temperature sensor/1 (TEMS1) sensor/2 (TEMS2) Heating roller A0P0T5C075DA Loop amount temperature A00JT2C271AA Fusing unit detection sensor sensor/3 (TEMS3) 1 (PS41), Loop amount detection sensor...
  • Page 198 Theory of Operation Ver. 1.0 Jan. 2009 22. FUSING SECTION (1) Configuration of the temperature detector element of fusing unit Heating roller sensor/1 (TEMS1) Heating roller thermistor/1 (TH2) Heating roller rotation sensor Soaking roller thermistor/2 (TH3) (PS56) Soaking roller thermostat (TS2) Loop amount detection sensor/2 (PS42) Loop amount detection...
  • Page 199 22. FUSING SECTION Theory of Operation Ver. 1.0 Jan. 2009 22.2 Drive Fusing pressure retraction motor (M29) Fusing retraction position sensor (PS59) Fusing pressure roller Pressure home sensor (PS55) Fusing motor (M30) Front side A00JT2C299AA Heating roller...
  • Page 200 Theory of Operation Ver. 1.0 Jan. 2009 22. FUSING SECTION 22.3 Operation 22.3.1 Fusing speed correction A. Roller speed control • In order to avoid fusing error, the rotation speed of heating roller/fusing pressure roller exchanged according to the paper type or the print mode. •...
  • Page 201 22. FUSING SECTION Theory of Operation Ver. 1.0 Jan. 2009 B. Adjustment of paper loop amount • By creating a paper loop, the speed difference between the fusing and paper convey- ance at 2nd transfer section will be adjusted. It prevents the double transferred image or brush effect.
  • Page 202 Theory of Operation Ver. 1.0 Jan. 2009 22. FUSING SECTION 22.3.2 Fusing pressure/retraction control • To ensure prolonged durability of the heating roller, the heating roller and fusing pressure roller is retracted * from the fusing belt during any time other than printing. (The roller is, however, retracted * during printing using envelopes.) *1: The fusing pressure roller does not completely retract but is slightly pressed to the...
  • Page 203 22. FUSING SECTION Theory of Operation Ver. 1.0 Jan. 2009 22.3.3 Heating roller heating control A. Heating control • The inside surface of the heating roller is formed with Ni layer. • The IH coil located beside the heating roller radiates magnetic flux to the heating roller when energized.
  • Page 204 Theory of Operation Ver. 1.0 Jan. 2009 22. FUSING SECTION C. Center heating switch control • The temperature on ends of the heating roller is measured with the heating roller sensor/ • When the temperature of ends of the heating roller exceeds a predetermined value dur- ing printing using paper of a small size or in the standby state, the demagnetization coil comes into play in inhibiting heating of roller ends and only the center portion of the roller is heated.
  • Page 205 22. FUSING SECTION Theory of Operation Ver. 1.0 Jan. 2009 D. Detection of rotation of the heating roller • The heating roller is rotated while it is being heated to ensure that the entire periphery of the roller reaches an adequate temperature. •...
  • Page 206 Theory of Operation Ver. 1.0 Jan. 2009 22. FUSING SECTION 22.3.4 Heating control of the fusing pressure roller • The fusing pressure roller has the soaking roller for heating. • The soaking roller is pressed constantly to the fusing pressure roller. •...
  • Page 207 22. FUSING SECTION Theory of Operation Ver. 1.0 Jan. 2009 22.3.5 Fusing temperature control • The surface temperature of the heating roller and the soaking roller are detected to con- trol the amount of the heat of the IH heater and the soaking pressure roller heater lamp in the soaking roller in order to maintain the appropriate fusing temperature.
  • Page 208 Theory of Operation Ver. 1.0 Jan. 2009 22. FUSING SECTION B. IH heater temperature control • The heater is controlled to allow the heating roller temperature to fall within a predeter- mined range during warm-up, printing, and in the standby state. •...
  • Page 209 22. FUSING SECTION Theory of Operation Ver. 1.0 Jan. 2009 C. Temperature control during warm-up • The warm-up control is started as soon as the main power switch and the sub power switch are turned ON. • If the fusing pressure roller presses the heating roller, the fusing pressure retraction motor is energized to let the fusing pressure roller retract from the heating roller.
  • Page 210 Theory of Operation Ver. 1.0 Jan. 2009 22. FUSING SECTION D. Temperature control in standby state • The machine enters the standby temperature control if no print requests are received after the warm-up. • The standby temperature control ensures that the temperature of each roller in the standby state is not decreased.
  • Page 211 22. FUSING SECTION Theory of Operation Ver. 1.0 Jan. 2009 F. Temperature control under low power mode • Temperature control is provided, in which the main coil and demagnetization coil are deenergized to suspend heating of the heating roller in order to reduce power consump- tion during the low power mode.
  • Page 212 Theory of Operation Ver. 1.0 Jan. 2009 22. FUSING SECTION 22.3.7 Heating roller temperature sensor condensation detection A. Detection of condensation on the heating roller temperature sensor • The control of detection of condensation on the heating roller temperature sensor is to determine degradation of detection accuracy of the temperature sensor caused by con- densation or dirt.
  • Page 213 22. FUSING SECTION Theory of Operation Ver. 1.0 Jan. 2009 B. Contamination detection conditions (1) Control start conditions • The contamination detection control is started if, at any timing 30 sec. or more after the completion of the warm-up, the difference in temperature between that detected by heat- ing roller thermistor/1 and that detected by heating roller temperature sensor/1 is equal to, or more than, a specified value and that condition lasts for 1 sec.
  • Page 214 Theory of Operation Ver. 1.0 Jan. 2009 22. FUSING SECTION C. Print job during the alternative temperature control • If a print job is received during the heating roller alternative temperature control, control is performed according to the settings made in "Security setting" of "Service mode". Reference: Service mode –...
  • Page 215 22. FUSING SECTION Theory of Operation Ver. 1.0 Jan. 2009 B. Hard protection • Next level is provided when the level 1 cannot detect due to CPU overrun. • The heater relay, through the printer control board, is turned OFF in the second level operation to block the power supply to the IH coil and soaking roller heater lamp.
  • Page 216 Theory of Operation Ver. 1.0 Jan. 2009 22. FUSING SECTION 22.3.11 Sensor disconnection detection control • If the temperature of the NC sensor/thermistor fails to reach the specified temperature in the given period after the warm-up started, the sensor is judged to have disconnection, and the trouble code will appear.
  • Page 217 22. FUSING SECTION Theory of Operation Ver. 1.0 Jan. 2009 22.3.13 Fusing cooling control A. Cooling of the IH coil unit • The machine is provided with the cooling fan motor for cooling the IH coil that heats the heating roller and heat accumulated in and around the K toner cartridge. •...
  • Page 218 Theory of Operation Ver. 1.0 Jan. 2009 22. FUSING SECTION B. Cooling of the fusing unit 1 • The machine is provided with fusing cooling fan motor/1 for cooling the fusing unit and the paper after the fusing process and drawing smell of the fusing section. •...
  • Page 219 22. FUSING SECTION Theory of Operation Ver. 1.0 Jan. 2009 C. Cooling of the fusing unit 2 • The machine is provided with fusing cooling fan motor/2 and fusing cooling fan motor/3 for cooling the machine interior around the fusing unit and the paper that has been fed out of the machine.

  • Page 220: Duplex Section

    Theory of Operation Ver. 1.0 Jan. 2009 23. DUPLEX SECTION 23. DUPLEX SECTION 23.1 Configuration A0P0T5C076DA A00JT2C275AA ADU transport roller 2 ADU transport roller 3 ADU paper passage sensor/1 (PS47) ADU door sensor (PS49) ADU paper passage sensor/2 (PS48) A00JT2C291AA...
  • Page 221 23. DUPLEX SECTION Theory of Operation Ver. 1.0 Jan. 2009 23.2 Drive ADU transport roller 1 ADU transport motor/1 ADU transport roller 2 (M31) ADU transport roller 3 ADU transport motor/2 (M32) ADU transport roller 4 A00JT2C291AA...
  • Page 222 Theory of Operation Ver. 1.0 Jan. 2009 23. DUPLEX SECTION 23.3 Operation 23.3.1 Paper conveyance control • Paper transported from the paper exit section is conveyed to the internal duplex section by the ADU transport roller 1 and 2. • Paper is conveyed to the vertical conveyance section by the ADU transport roller 3 and 4 to re-transport the paper.
  • Page 223 23. DUPLEX SECTION Theory of Operation Ver. 1.0 Jan. 2009 B. Paper entrance control • The switchback motor at the paper exit section is deenergized to stop transport of the paper temporarily (stop position 1). The switchback motor thereafter rotates backward to transport the paper into the duplex section.
  • Page 224 Theory of Operation Ver. 1.0 Jan. 2009 23. DUPLEX SECTION 23.3.2 Duplex circulation control • The duplex circulation control is performed differently according to the sub scanning direction length of the paper. Sub scanning direction paper length Duplex circulation control Lower limit Upper limit 433 mm or more...
  • Page 225 23. DUPLEX SECTION Theory of Operation Ver. 1.0 Jan. 2009 Operation 4 • The image of the first page is printed on the paper re-sup- plied from the duplex section. A00JT2C239AA Operation 5 • The first sheet of the paper is fed out. •...
  • Page 226 Theory of Operation Ver. 1.0 Jan. 2009 23. DUPLEX SECTION B. Two-sheet circulation operation Operation 1 • The first sheet of paper is supplied and the image of the second page is printed. A00JT2C236AA Operation 2 • The first sheet of paper is reversed at the paper exit sec- tion and transported onto the duplex section.
  • Page 227 23. DUPLEX SECTION Theory of Operation Ver. 1.0 Jan. 2009 Operation 5 • The first sheet of paper is fed out. • The second sheet of paper waits at stop position3 (ADU transport roller 4). • The image of the sixth page is printed on the third sheet of paper.
  • Page 228 Theory of Operation Ver. 1.0 Jan. 2009 23. DUPLEX SECTION C. Three-sheet circulation operation Operation 1 • The first sheet of paper is supplied and the image of the second page is printed. A0P0T5C040DA Operation 2 • The first sheet of paper is reversed at the paper exit section and transported onto the duplex section.
  • Page 229 23. DUPLEX SECTION Theory of Operation Ver. 1.0 Jan. 2009 Operation 6 • The first sheet of paper is fed out. • The second sheet of paper waits at stop position 3. • The third sheet of the paper is transported onto, and stopped at, stop position 2 (ADU transport roller 2).

  • Page 230: Paper Exit Section

    Theory of Operation Ver. 1.0 Jan. 2009 24. PAPER EXIT SECTION 24. PAPER EXIT SECTION 24.1 Configuration Switchback paper exit section A00JT2C280AA Paper exit section Switchback roller Paper exit sensor (PS39) Paper exit roller 2 A00JT2C309AA Paper exit switch gate Paper exit roller 1...
  • Page 231 24. PAPER EXIT SECTION Theory of Operation Ver. 1.0 Jan. 2009 24.2 Drive • The paper exit and switchback roller are driven by the exclusive motor. Switchback Motor (M33) Paper exit motor (M4) Switchback roller A00JT2C310AA Paper exit roller 2...
  • Page 232 Theory of Operation Ver. 1.0 Jan. 2009 24. PAPER EXIT SECTION 24.3 Operation 24.3.1 Transport control • The paper exit section feeds the paper transported from the fusing section out onto the exit tray using paper exit roller 1 and paper exit roller 2. •...
  • Page 233 24. PAPER EXIT SECTION Theory of Operation Ver. 1.0 Jan. 2009 B. Paper exit control • The paper exit roller 1 is connected to the fusing motor. When the fusing motor is ener- gized, the paper exit roller 1 is synchronized with the fusing roller and the roller 1 starts rolling.
  • Page 234 Theory of Operation Ver. 1.0 Jan. 2009 24. PAPER EXIT SECTION (1) Operation timing Instruction form the Switchback motor optimal paper position turns around Fusing motor (M30) Exhaust sensor (PS39) Gate switch solenoid (SD) Nomal rotation Switchback motor (M33) Inverse rotation ADU transport motor/1 (M31) A00JT2E531DA...

  • Page 235: Image Stabilization Control

    25. IMAGE STABILIZATION CONTROL Theory of Operation Ver. 1.0 Jan. 2009 25. IMAGE STABILIZATION CONTROL 25.1 Overview • The machine provides the following image stabilization control to ensure stabilized copy image. Purpose Control Control means • IDC registration sensor adjust- ment control •...

  • Page 236: Description Of Control

    Theory of Operation Ver. 1.0 Jan. 2009 25. IMAGE STABILIZATION CONTROL 25.2 Description of control 25.2.1 IDC registration sensor adjustment control • Controls changes in characteristics due to change with time and contamination of the transfer belt and IDC registration sensor, part-to-part variations in the sensors, and change of environment.

  • Page 237: Operation Sequence

    25. IMAGE STABILIZATION CONTROL Theory of Operation Ver. 1.0 Jan. 2009 25.3 Operation sequence Mode 1 Mode 3 Mode 4 Mode 5 Mode 6 Mode 2 Sequence (new, initial- (registration (registration (mono- (mono- (ordinary) ized) chrome 1) chrome 2) IDC registra- IDC registra- IDC registra- IDC registra-...

  • Page 238: Operation Timing

    Theory of Operation Ver. 1.0 Jan. 2009 25. IMAGE STABILIZATION CONTROL 25.4 Operation timing A. Predrive operation Mode Operation condition * Stabilization mode • A new transfer belt is detected • IU units are removed and installed. • A new IU is detected (Image stabilization in the initial value is executed only for a new IU that has been Mode 1 installed)
  • Page 239 25. IMAGE STABILIZATION CONTROL Theory of Operation Ver. 1.0 Jan. 2009 • These modes are provided to maintain image quality and achieve the following purposes. 1. To reduce frequency at which the stabilization control is performed in order to reduce cost per print for users who have a low print volume and low color ratio 2.
  • Page 240 Theory of Operation Ver. 1.0 Jan. 2009 25. IMAGE STABILIZATION CONTROL B. Before, during, and after a print cycle Operating conditions Change in Change in PH absolute temperature of Pressure Count of humidity of a The number a predeter- Execution condition of printed pages predeter-...
  • Page 241 25. IMAGE STABILIZATION CONTROL Theory of Operation Ver. 1.0 Jan. 2009 Paper length in the sub scanning direction Count 216 mm or less Over 216 mm and up to 432 mm or less Over 432 mm and up to 648 mm or less Over 648 mm and up to 864 mm or less Over 864 mm and up to 1080 mm or less Over 1080 mm...

  • Page 242: Scanner Section Image Processing Block Diagram

    Theory of Operation Ver. 1.0 Jan. 2009 26. IMAGE PROCESSING 26. IMAGE PROCESSING 26.1 Scanner section image processing block diagram 1. Photoelectric conversion CCD sensor board 2. Analog-to-digital conversion To the MFP board • The following detail the image processing operations performed by the scanner section. 1.

  • Page 243: Write Section Image Processing Block Diagram

    26. IMAGE PROCESSING Theory of Operation Ver. 1.0 Jan. 2009 26.2 Write section image processing block diagram From scanner section MFP board 1. Shading correction 2. Line-to-line variation correction/color aberration correction 3. Free erase 16. Output buffer memory 4. ACS control 17.
  • Page 244 Theory of Operation Ver. 1.0 Jan. 2009 26. IMAGE PROCESSING • The following detail the image processing operations performed by MFP board on the Write section. 1. Correct variations in reading caused by pixel-to-pixel variations in sensitivity of the CCD sensor and uneven light distribution by the exposure lamp. A peak-hold-type shading correction is performed, in which the maximum value of two or more read- ings of two or more lines is taken to prevent effect due to dust or dirt on the shading sheet.
  • Page 245 26. IMAGE PROCESSING Theory of Operation Ver. 1.0 Jan. 2009 21. Edge of letter and lineal drawing gets area discrimination and FEET processing is conducted according to the discrimination result. 22. When FEET processing is conducted, interpolation is done so that no influence is given to continuous gradation portion.

  • Page 246: Power Supply Section

    Theory of Operation Ver. 1.0 Jan. 2009 27. POWER SUPPLY SECTION 27. POWER SUPPLY SECTION 27.1 Parts energized when the main power switch is turned ON 27.1.1 Configuration Main power switch A0P0T2J613AA 27.1.2 Operation • When the main power switch is turned ON, power is supplied from the DC power supply unit to the following components.

  • Page 247: Parts Energized When The Sub Power Switch Is Turned On

    27. POWER SUPPLY SECTION Theory of Operation Ver. 1.0 Jan. 2009 27.2 Parts energized when the sub power switch is turned ON 27.2.1 Configuration Sub power switch A0P0T2E614AA 27.2.2 Operation • When the sub power switch is turned ON, MFP board detects it and sends a control sig- nal to the DC power supply through the printer control board.

  • Page 248: Power Cables

    Theory of Operation Ver. 1.0 Jan. 2009 27. POWER SUPPLY SECTION 27.3 Power cables 27.3.1 Configuration • C652/C552 Power supply:15A A00HT2C304AA • C652 (Only Taiwan) Power supply 1:15A A00HT2C303AA Power supply 2:7A 27.3.2 Operation • C652/C552 The main body uses a single outlet. •...

  • Page 249: Fan Control

    28. FAN CONTROL Theory of Operation Ver. 1.0 Jan. 2009 28. FAN CONTROL 28.1 Configuration Optical cooling fan motor (FM201) Rear side cooling fan motor (FM16) Toner suction fan motor (FM7) Fusing cooling fan motor/1 (FM2) Paper cooling fan motor (FM13) Ozone ventilation fan motor (FM6) Fusing cooling fan motor/3 (FM5) Fusing cooling fan motor/2 (FM4)
  • Page 250 Theory of Operation Ver. 1.0 Jan. 2009 28. FAN CONTROL 28.2 Operation 28.2.1 Function Motor name Control conditions • Paper will be sucked between transfer part and fusing part, so it will have Suction fan motor (FM1) a stable behavior and go smoothly into the fusing roller. •...
  • Page 251 28. FAN CONTROL Theory of Operation Ver. 1.0 Jan. 2009 28.2.2 Control conditions Motor name Control Control conditions (outline) Stop • Any timing other than below • During print cycle • During image stabilization performed during print cycle Suction fan motor (FM1) Full speed •...
  • Page 252 Theory of Operation Ver. 1.0 Jan. 2009 28. FAN CONTROL Motor name Control Control conditions (outline) Stop • Any timing other than below • Half speed rotation for 30 sec. after the end of following con- Half speed ditions IH cooling fan motor/1 •...
  • Page 253 28. FAN CONTROL Theory of Operation Ver. 1.0 Jan. 2009 Motor name Control Control conditions (outline) • For printing a paper which size is B5 or less. Or other than Stop following. Exit cooling fan motor2/ • Full speed rotation for 30 sec. after paper exit following the 3 (FM102,FM103) Full speed end of print cycle.

  • Page 254: Counter Control

    Theory of Operation Ver. 1.0 Jan. 2009 29. COUNTER CONTROL 29. COUNTER CONTROL 29.1 Configuration Printer control board Total counter (PRCB) Key counter (option) MFP board (MFPB) Electronic counter A0P0T2C612AA 29.2 Operation Name Function/system • Displays the cumulative number of copies and prints of all jobs. Total counter •...
  • Page 255 29. COUNTER CONTROL Theory of Operation Ver. 1.0 Jan. 2009 Blank Page...

  • Page 256: Theory Of Operation

    SERVICE MANUAL THEORY OF OPERATION 2009.01 Ver. 1.0...

  • Page 257: 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 258 Theory of Operation Ver. 1.0 Jan 2009 CONTENTS DF-618 OUTLINE PRODUCT SPECIFICATIONS ................1 SECTION CONFIGURATION.................. 5 PAPER PATH......................5 CONFIGURATION/OPERATION CONFIGURATION ....................6 DRIVE ........................7 OPERATION ......................8 Paper feed section ....................8 6.1.1 Document feed tray ascent/descent mechanism .......... 8 6.1.2 Feeding the original..................
  • Page 259 Theory of Operation Ver. 1.0 Jan 2009 Blank Page...

  • Page 260: Outline

    Theory of Operation Ver. 1.0 Jan 2009 1. PRODUCT SPECIFICATIONS OUTLINE PRODUCT SPECIFICATIONS A. Type Name Reverse automatic document feeder Paper feed section Paper feed from top of stack Image reading section Sheet-through system Type Turnover section Switchback system Exit section Straight exit system Installation Screw cramp to the main body...
  • Page 261 1. PRODUCT SPECIFICATIONS Theory of Operation Ver. 1.0 Jan 2009 D. Paper feed prohibited originals • If fed, trouble occurrence will be highly possible. Type of original Possible trouble Paper feed failure, damaged sheet, defective drive Sheets stapled or clipped together mechanism due to jammed staples or clips Sheets glued together Paper feed failure, damaged sheet...
  • Page 262 Theory of Operation Ver. 1.0 Jan 2009 1. PRODUCT SPECIFICATIONS F. Mixed original feed chart For metric Max. original 297 mm 257 mm 210 mm 182 mm 148 mm 128 mm size Mixed original size 297 mm 257 mm 210 mm 182 mm 148 mm 128 mm...
  • Page 263 1. PRODUCT SPECIFICATIONS Theory of Operation Ver. 1.0 Jan 2009 G. Machine specifications DC 24 V (supplied from the main unit) Power requirements DC 5 V Max. power 60 W or less consumption 618 mm (W) x 575 mm (D) x 130 mm (H) Dimensions 24.33 inch (W) x 22.64 inch (D) x 5.12 inch (H) Weight...

  • Page 264: Section Configuration

    Theory of Operation Ver. 1.0 Jan 2009 2. SECTION CONFIGURATION SECTION CONFIGURATION Transport section Paper feed section Paper exit section 9J07T2C203c0 Turnover section Paper exit turnover section PAPER PATH Feed tray Exit tray A0HTT2C001DA Document read position...

  • Page 265: Configuration/Operation

    4. CONFIGURATION Theory of Operation Ver. 1.0 Jan 2009 CONFIGURATION/OPERATION CONFIGURATION A01HT2C002AA A0P0T5C052DA Transportation cover Original read section Document feed tray Magnet Turnover cover Document guide Feed roller Pick-up roller Registration roller Separation roller Switch back roller A0HTT4C001DA Exit roller Reading roller 2 Reading roller 1 Exit switch back roller...

  • Page 266: Drive

    Theory of Operation Ver. 1.0 Jan 2009 5. DRIVE DRIVE Take-up motor (M2) Exit motor (M3) Lift-up motor (M6) Switch back roller pressure/retraction Regist motor (M7) motor (M5) Reading motor (M1) Reading roller pressure/ retraction motor (M4) A0HTT5C001DA...

  • Page 267: Operation

    6. OPERATION Theory of Operation Ver. 1.0 Jan 2009 OPERATION Paper feed section 6.1.1 Document feed tray ascent/descent mechanism • The document feed tray will move up to feed the original. • Ascent/descent of the document feed tray will be performed by the lift-up motor. A.

  • Page 268: Feeding The Original

    Theory of Operation Ver. 1.0 Jan 2009 6. OPERATION 6.1.2 Feeding the original • The paper feed section consists of the pick-up roller, feed roller as well as the separation roller, and is directly driven by the take-up motor. • Pressing the start key will transfer the original to the registration roller by the pick-up roller and the feed roller.

  • Page 269: Original Size Detection

    6. OPERATION Theory of Operation Ver. 1.0 Jan 2009 6.1.4 Original size detection Length sensor 3 Length sensor 1 (PS12) (PS10) Length sensor 2 (PS11) Before read Document width detection sensor (PS9) variable resistor (VR1) A0HTT6C002DA Mixed sensor 1 (PS19) Mixed sensor 3 Mixed sensor 2 (PS17)

  • Page 270: Transport Section

    Theory of Operation Ver. 1.0 Jan 2009 6. OPERATION Transport section 6.2.1 Transfer mechanism • The original transferred from the paper feed section will be transferred to the paper exit section or turnover section by the registration roller, the reading roller 1 and 2, and the switch back roller.

  • Page 271: Turnover/Paper Exit Section

    6. OPERATION Theory of Operation Ver. 1.0 Jan 2009 Turnover/paper exit section 6.3.1 Transferring the original • The original transferred from the transport section will switch back or exit by the exit roller, the switch back roller, and the exit switch back roller. •...
  • Page 272 Theory of Operation Ver. 1.0 Jan 2009 6. OPERATION B. Paper exit section • The exit lever will switch the pathway of the original to exit. • The exit lever will be switched by ON/OFF of the exit switch back solenoid. When in 1-sided mode: Exit switch back solenoid will be OFF When in 2-sided/mixed original/AMS (1-sided, 2-sided) mode: Exit switch back solenoid will be ON Exit switch back solenoid (SD2)

  • Page 273: Switch Back Roller Pressure/Retraction Control

    6. OPERATION Theory of Operation Ver. 1.0 Jan 2009 6.3.3 Switch back roller pressure/retraction control • To enhance productivity in document scanning, control is performed at the turnover sec- tion by narrowing the gap between two originals so that they pass each other properly at the switch back roller.

  • Page 274: Paper Path

    Theory of Operation Ver. 1.0 Jan 2009 6. OPERATION Paper path 6.4.1 1-sided mode A0HTT6C007DA 1. Pressing the start key will lift up the feed tray and press the reading roller 1. 2. After the feed tray is lifted up, the feed motor is started and the pick-up roller and the feed roller will start rotating to start feeding the first sheet of paper.

  • Page 275: 2-Sided Mode

    6. OPERATION Theory of Operation Ver. 1.0 Jan 2009 6.4.2 2-sided mode 1. The first side of the original will be read. 2. The original will be transferred to the turnover section. (Switch back solenoid will be 3. In order to read the second side of the original which is transferred to the turnover section, the switch back roller will reverse by the switch pack operation of the regist motor, and transfer the original to the switch back registration roller.

  • Page 276: Mixed Original/Ams Mode (2-Sided)

    Theory of Operation Ver. 1.0 Jan 2009 6. OPERATION 6.4.3 Mixed original/AMS mode (2-sided) • Paper path control will be the same as the 2-sided mode. 1. The original will be fed to detect the paper length. (It will not read the original) The length of the original will be judged by the before read sensor ON time, and the width of the original will be judged by the mixed sensor 1, 2, and 3.
  • Page 277 6. OPERATION Theory of Operation Ver. 1.0 Jan 2009 4. The original will be transferred to the paper exit turnover section after second side is read. (Switch back solenoid will be ON) Exit switch back roller will reverse by the exit motor’s reverse operation. A0HTT6C014DA 5.

  • Page 278: Open/Close Detecting Section

    Theory of Operation Ver. 1.0 Jan 2009 6. OPERATION Open/close detecting section 6.5.1 DF 15 degree open/close detection • The lever actuator is provided to detect the original size when using the auto document feeder as the original cover. • When lowering the auto document feeder to 15 degree angle or lower, the angle detec- tion lever for the original cover on the copier will be pressed to turn ON the 15 degree sensor.

  • Page 279: Cooling Inside The Unit

    6. OPERATION Theory of Operation Ver. 1.0 Jan 2009 Cooling inside the unit • The air will be blown inside the unit by the cooling fan in order to avoid the temperature increase of the driving motor and the board. Cooling fan motor (FM1)

  • Page 280: Theory Of Operation

    SERVICE MANUAL THEORY OF OPERATION 2009.01 Ver. 1.0...

  • Page 281: 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 282 Theory of Operation Ver. 1.0 Jan 2009 CONTENTS LU-301 OUTLINE PRODUCT SPECIFICATION .................. 1 SECTION CONFIGURATION.................. 2 PAPER FEED PATH ....................2 CONFIGURATION/OPERATION CONFIGURATION ....................3 DRIVE ........................4 OPERATIONS ......................5 Paper Feed and Transport Control ............... 5 Paper level detection .................... 7 Paper empty detection..................
  • Page 283 Theory of Operation Ver. 1.0 Jan 2009 Blank Page...

  • Page 284: Outline

    Theory of Operation Ver. 1.0 Jan 2009 1. PRODUCT SPECIFICATION OUTLINE PRODUCT SPECIFICATION A. Type Name 3,000 sheets Large Capacity Unit Type External option attached to the right side of the main body Document alignment Center B. Paper type Type Size Weight Capacity...

  • Page 285: Section Configuration

    2. SECTION CONFIGURATION Theory of Operation Ver. 1.0 Jan 2009 SECTION CONFIGURATION Paper transport section Paper storage section Paper feed section Dehumidification heater A03NT1C002AA PAPER FEED PATH Transportation to main body Paper feed from the tray A03NT1C001AA Main body LU-301...

  • Page 286: Configuration/Operation

    Theory of Operation Ver. 1.0 Jan 2009 4. CONFIGURATION CONFIGURATION/OPERATION CONFIGURATION A03NT2C204AA LU drive board (LUDB) Near empty sensor /1 (PS5) Near empty sensor /2 (PS6) LU door switch (MS1) Upper limit sensor (PS2) Tray LED (LED) Dehumidification heater A03NT2C213AA (DH) Lift-up motor (M1) Paper empty sensor (PS4)

  • Page 287: Drive

    5. DRIVE Theory of Operation Ver. 1.0 Jan 2009 DRIVE Feed roller Transport motor (M3) Paper feed motor (M2) Transport roller A03NT2C214AA...

  • Page 288: Operations

    Theory of Operation Ver. 1.0 Jan 2009 6. OPERATIONS OPERATIONS Paper Feed and Transport Control • The feed roller rotates and feeds paper at a predetermined timing. • The LCT transport rollers rotate and convey paper at a predetermined timing. •...
  • Page 289 6. OPERATIONS Theory of Operation Ver. 1.0 Jan 2009 • Layout of sensors and rollers Paper feed sensor (PS3) Transfer roller Feed roller Tray2 vertical transport sensor (PS12) Tray2 vertical transport roller A03NT2C002AA Main body LU-301...

  • Page 290: Paper Level Detection

    Theory of Operation Ver. 1.0 Jan 2009 6. OPERATIONS Paper level detection • The level of the paper still available for use is determined based on the outputs from near empty sensor/1 and sensor/2. • A near empty condition is detected when the amount of paper left still available for use is about 50 sheets ±...

  • Page 291: Paper Empty Detection

    6. OPERATIONS Theory of Operation Ver. 1.0 Jan 2009 Paper empty detection • The paper empty sensor detects a paper empty condition. Paper empty sensor (PS4) Upper limit sensor (PS2) Paper still available A03NT2C205AA Paper empty condition A03NT2C205AA Paper level indicator •...

  • Page 292: Tray Lift-Up Control

    Theory of Operation Ver. 1.0 Jan 2009 6. OPERATIONS Tray lift-up control 6.5.1 Tray ascend/descend mechanism • The tray is suspended by the wires at the front and rear. • Rotation of the lift-up motor winds the wires, which causes the tray to go up. •...
  • Page 293 6. OPERATIONS Theory of Operation Ver. 1.0 Jan 2009 A. Closing the LU door • The condition of the upper limit sensor signal is checked when the LU door is closed. If the upper limit sensor is unblocked, the lift-up motor is energized so that lifting of the tray is started.

  • Page 294: Paper Size Detection

    Theory of Operation Ver. 1.0 Jan 2009 6. OPERATIONS 6.5.2 Paper size detection • The LCT is not capable of detecting the paper size. • The paper size is set by Service Mode → System 2 → LCT Paper Size Setting. A03NT2E500DA Dehumidification heater control •...
  • Page 295 6. OPERATIONS Theory of Operation Ver. 1.0 Jan 2009 Blank Page...

  • Page 296: Theory Of Operation

    SERVICE MANUAL THEORY OF OPERATION 2009.01 Ver. 1.0...

  • Page 297: 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 298 Theory of Operation Ver. 1.0 Jan. 2009 CONTENTS LU-204 OUTLINE PRODUCT SPECIFICATION .................. 1 SECTION CONFIGURATION.................. 2 PAPER FEED PATH ....................2 CONFIGURATION/OPERATION CONFIGURATION ....................3 DRIVE ........................4 OPERATIONS ......................5 Paper feed and transport control ................5 Paper level detection .................... 6 Paper empty detection..................
  • Page 299 Theory of Operation Ver. 1.0 Jan. 2009 Blank Page...

  • Page 300: Outline

    Theory of Operation Ver. 1.0 Jan. 2009 1. PRODUCT SPECIFICATION OUTLINE PRODUCT SPECIFICATION A. Type Name 2,500 sheets Large Capacity Unit Type External option attached to the right side of the main body Document alignment Center B. Paper type Type Size Weight Capacity...

  • Page 301: Section Configuration

    2. SECTION CONFIGURATION Theory of Operation Ver. 1.0 Jan. 2009 SECTION CONFIGURATION Paper transport section Paper feed section Paper storage section Dehumidification heater A0TJT1C001DA PAPER FEED PATH Transportation to main body Paper feed from the tray Main body LU-204 A0TJT1C002DA...

  • Page 302: Configuration/Operation

    Theory of Operation Ver. 1.0 Jan. 2009 4. CONFIGURATION CONFIGURATION/OPERATION CONFIGURATION A0TJT2C001DA LU drive board (LUDB) Near empty sensor /1 (PS5) Near empty sensor /2 (PS6) LU door switch (MS1) Tray LED (LED) Paper feed sensor (PS3) Paper empty sensor (PS4) Upper limit sensor (PS2) Lift-up motor (M1) Tray set sensor/2 (PS7)

  • Page 303: Drive

    5. DRIVE Theory of Operation Ver. 1.0 Jan. 2009 DRIVE Transport motor (M3) Feed roller Paper feed motor (M2) Transport roller A0TJT2C003DA...

  • Page 304: Operations

    Theory of Operation Ver. 1.0 Jan. 2009 6. OPERATIONS OPERATIONS Paper feed and transport control • The feed roller rotates and feeds paper at a predetermined timing. • The LCT transport rollers rotate and convey paper at a predetermined timing. •...

  • Page 305: Paper Level Detection

    6. OPERATIONS Theory of Operation Ver. 1.0 Jan. 2009 Paper level detection • The level of the paper still available for use is determined based on the outputs from near empty sensor/1 and sensor/2. • The estimate amount of paper for near empty is around 50. Reference data: Paper full Paper near full...

  • Page 306: Paper Empty Detection

    Theory of Operation Ver. 1.0 Jan. 2009 6. OPERATIONS Paper empty detection • The paper empty sensor detects a paper empty condition. Paper empty sensor (PS4) Upper limit sensor (PS2) Paper still available Paper empty condition A0TJT2C006DA...

  • Page 307: Paper Level Indicator

    6. OPERATIONS Theory of Operation Ver. 1.0 Jan. 2009 Paper level indicator • The level of the paper still available for use is indicated by the LED provided on the right- hand side of the unit as viewed from the front, and displayed on the control panel. •...

  • Page 308: Tray Lift-Up Control

    Theory of Operation Ver. 1.0 Jan. 2009 6. OPERATIONS Tray lift-up control 6.5.1 Tray ascend/descend mechanism • The tray is suspended by the wires at the front and rear. • Rotation of the lift-up motor winds the wires, which causes the tray to go up. •...
  • Page 309 6. OPERATIONS Theory of Operation Ver. 1.0 Jan. 2009 A. Closing the LU door • The condition of the upper limit sensor signal is checked when the LU door is closed. If the upper limit sensor is unblocked, the lift-up motor is energized so that lifting of the tray is started.
  • Page 310 Theory of Operation Ver. 1.0 Jan. 2009 6. OPERATIONS B. During a print cycle • As the paper is consumed for a number of print cycles carried out, the pickup roller grad- ually lowers and eventually unblocks the upper limit sensor. The lift-up motor is then energized again and the lifting of the tray is started.

  • Page 311: Paper Size Detection

    6. OPERATIONS Theory of Operation Ver. 1.0 Jan. 2009 6.5.2 Paper size detection • The LCT is not capable of detecting the paper size. • The paper size is set by Service Mode → System 2 → LCT Paper Size Setting. A0TJT2E015DA Dehumidification heater control •...

  • Page 312: Theory Of Operation

    SERVICE MANUAL THEORY OF OPERATION 2009.01 Ver. 1.0...

  • Page 313: 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 314 Theory of Operation Ver. 1.0 Jan. 2009 CONTENTS FS-526 OUTLINE PRODUCT SPECIFICATIONS ................1 PAPER FEED PATH ....................4 Main tray ....................... 4 Sub tray ........................ 5 Stapling......................... 6 CONFIGURATION/OPERATION CONFIGURATION ....................7 HORIZONTAL TRANSPORT SECTION ..............8 Configuration ......................8 Horizontal transport mechanism................
  • Page 315 Theory of Operation Ver. 1.0 Jan. 2009 STAPLER ......................25 Drive ........................25 Operation......................26 8.2.1 Stapler movement..................26 8.2.2 Stapler control..................... 27...

  • Page 316: Outline

    Theory of Operation Ver. 1.0 Jan. 2009 1. PRODUCT SPECIFICATIONS OUTLINE PRODUCT SPECIFICATIONS A. Type Name Flat-stapling finisher: 100 sheets staple Type Staple finisher attached to the side of the main body Including horizontal transport unit (Built-in finisher that is mounted from the left of Installation the main body) Document...
  • Page 317 1. PRODUCT SPECIFICATIONS Theory of Operation Ver. 1.0 Jan. 2009 D. Max. paper capacity 3,000 sheets :A4/A4S, B5/B5S, 8 x 11/ x 11S, 16K/16KS, x 10 x 10 1,500 sheets :A3, B4, 8 x 13, 8 x 13, x 13, 8 x 13 x 13 , 12 x 8, 11 x 17,...
  • Page 318 Theory of Operation Ver. 1.0 Jan. 2009 1. PRODUCT SPECIFICATIONS F. Machine specifications DC 24 V (supplied from the main body) Power requirements DC 5 V (supplied from the main body) Max. power 85 W or less consumption 723.8 (W) x 709.5 (D) x 1025 (H) mm 28.45 (W) x 27.88 (D) x 40.28 (H) inch Dimensions 848.8 (W) x 709.5 (D) x 1025 (H) mm *...

  • Page 319: Paper Feed Path

    2. PAPER FEED PATH Theory of Operation Ver. 1.0 Jan. 2009 PAPER FEED PATH Main tray Paper output roller Alignment plate Bypass gate Main tray Paper path from the horizontal transport unit A11PT1C001DA...

  • Page 320: Sub Tray

    Theory of Operation Ver. 1.0 Jan. 2009 2. PAPER FEED PATH Sub tray Sub tray Sub tray change gate Bypass gate Paper path from the horizontal transport unit A11PT1C002DA...

  • Page 321: Stapling

    2. PAPER FEED PATH Theory of Operation Ver. 1.0 Jan. 2009 Stapling Paper output roller Sub tray change gate Bypass gate Main tray Paper path from the horizontal transport unit Stapler Alignment section A11PT1C003DA...

  • Page 322: Configuration/Operation

    Theory of Operation Ver. 1.0 Jan. 2009 3. CONFIGURATION CONFIGURATION/OPERATION CONFIGURATION • The following sections are combined in a single unit: the horizontal transport section, transport section, alignment section, exit tray section (main tray), and stapler section. Horizontal transport section Transport section Alignment section Exit tray section...

  • Page 323: Horizontal Transport Section

    4. HORIZONTAL TRANSPORT SECTION Theory of Operation Ver. 1.0 Jan. 2009 HORIZONTAL TRANSPORT SECTION Configuration • The horizontal transport section is composed of the transport control board, transport motor, fan motor, door open/close sensor, and paper pass sensor. Door open/close sensor (PS201) Transport control board (TRCB) Fan motor/2 (FM2) Transport motor (M201)

  • Page 324: Horizontal Transport Mechanism

    Theory of Operation Ver. 1.0 Jan. 2009 4. HORIZONTAL TRANSPORT SECTION Horizontal transport mechanism 4.2.1 Paper transport • The horizontal transport section transfers paper fed out from the main body to the fin- isher. • The transport motor provides drive for the transport rollers. •...

  • Page 325: Fan Motor

    4. HORIZONTAL TRANSPORT SECTION Theory of Operation Ver. 1.0 Jan. 2009 4.2.2 Fan motor • The fan motor cools the paper fed out from the main body. Fan motor/2 (FM2) Fan motor/1 (FM1) A11PT2C002DA (1) Function Motor name Function Fan motor/1 (FM1) •...

  • Page 326: Transport Section

    Theory of Operation Ver. 1.0 Jan. 2009 5. TRANSPORT SECTION TRANSPORT SECTION Drive Sub tray exit roller/2 Bypass roller Bypass gate Transport motor/2 (M2) Transport motor/1 (M1) Sub tray exit roller/1 Stacker entrance motor (M10) Sub tray gate solenoid (SD3) Z-fold punch regist sensor (PS2)

  • Page 327: Operation

    5. TRANSPORT SECTION Theory of Operation Ver. 1.0 Jan. 2009 Operation 5.2.1 Route change gate • The route change gate switches paper to different routes that go to individual trays and SD-508. • The FS control board controls the route change gate solenoid. •...

  • Page 328: Bypass Gate

    Theory of Operation Ver. 1.0 Jan. 2009 5. TRANSPORT SECTION 5.2.2 Bypass gate • The bypass route is provided to eliminate loss of time spent for the subsequent paper and to increase productivity during stapling. • The bypass gate is provided at the place where the regular route and the bypass route join.
  • Page 329 5. TRANSPORT SECTION Theory of Operation Ver. 1.0 Jan. 2009 B. Bypass gate control • The bypass gate only operates for the paper (8 x 11, A4, 16K, Executive, B5, and ISO- B5). • The FS control board controls the bypass gate solenoid. •...

  • Page 330: Exit Tray Section

    Theory of Operation Ver. 1.0 Jan. 2009 6. EXIT TRAY SECTION EXIT TRAY SECTION Drive Main tray Lift pulley /Up Lift wire Lift pulley /Lw Main tray lift motor (M5) A11PT2C009DA...

  • Page 331: Operation

    6. EXIT TRAY SECTION Theory of Operation Ver. 1.0 Jan. 2009 Operation 6.2.1 Tray lift A. Tray lift operation • The worm gear installed in the shaft of the main tray lift motor winds up the lift wire. • It lifts up or down the main tray depending on the winding direction. •...

  • Page 332: Exit Roller Motor

    Theory of Operation Ver. 1.0 Jan. 2009 6. EXIT TRAY SECTION 6.2.2 Exit roller motor • The exit roller motor is driven by the signal from the FS control board. • The main tray exit roller is driven by the exit roller motor. <Store paper into alignment section>...

  • Page 333: Main Tray Transport

    6. EXIT TRAY SECTION Theory of Operation Ver. 1.0 Jan. 2009 6.2.3 Main tray transport • After the process in the alignment section, the exit roller motor and paper output roller motor are driven to transfer paper to the main tray. A.

  • Page 334: Sub Tray Exit

    Theory of Operation Ver. 1.0 Jan. 2009 6. EXIT TRAY SECTION 6.2.4 Sub tray exit • The sub tray change gate is provided to transfer paper conveyed from the horizontal transport section to the sub tray. • The sub tray change gate transfers the paper to the sub tray by moving up and down. •...

  • Page 335: Alignment Section

    7. ALIGNMENT SECTION Theory of Operation Ver. 1.0 Jan. 2009 ALIGNMENT SECTION Drive Alignment plate/F Trail edge stopper Alignment plate belt/F Alignment plate/R Alignment plate motor/F (M11) Alignment plate motor/R (M12) Alignment plate belt/R 2 staples trail edge stopper motor (M19) A11PT2C015DA...

  • Page 336: Operation

    Theory of Operation Ver. 1.0 Jan. 2009 7. ALIGNMENT SECTION Operation 7.2.1 Alignment plate • After sheets of paper are aligned and stapled inside the finisher, they are transferred to the main tray. With the exit roller separated, each copy set is stored in the alignment sec- tion at a time.

  • Page 337: Shift Control

    7. ALIGNMENT SECTION Theory of Operation Ver. 1.0 Jan. 2009 7.2.2 Shift control • In normal print and staple mode, the paper is fed into the tray at its center position. If no stapling is involved in the sort or group copy mode, the alignment plate shifts 15 mm to the front or rear from the center.
  • Page 338 Theory of Operation Ver. 1.0 Jan. 2009 7. ALIGNMENT SECTION A. Shift operation • Under sort/group copy mode, after a specified period of time the 2 staples stacker sensor detected the trailing edge of paper, the alignment plate motor/R and /F are turned ON to shift the alignment plate/R and /F.

  • Page 339: Alignment Section Transport Mechanism

    7. ALIGNMENT SECTION Theory of Operation Ver. 1.0 Jan. 2009 7.2.3 Alignment section transport mechanism • When the paddle motor is driven, it makes the rewind paddle and paddle 1/2 rotate to transfer paper conveyed from the main body to the alignment section. •...

  • Page 340: Stapler

    Theory of Operation Ver. 1.0 Jan. 2009 8. STAPLER STAPLER Drive Stapler position sensor/3 (PS52) Stapler position sensor/2 (PS51) Stapler position sensor/4 (PS53) Stapler position sensor/1 (PS50) 2 staples stapler movement motor (M13) Stapler drive rack A11PT2C023DA...

  • Page 341: Operation

    8. STAPLER Theory of Operation Ver. 1.0 Jan. 2009 Operation 8.2.1 Stapler movement A. Stapler movement operation • The 2 staples stapler movement motor moves the stapler. • The rotation of the 2 staples stapler movement motor makes the belt rotate the gear, causing the stapler drive rack to operate with the stapler.

  • Page 342: Stapler Control

    Theory of Operation Ver. 1.0 Jan. 2009 8. STAPLER 8.2.2 Stapler control • The stapling operation is performed by the 2 staples stapler motor. A. Stapling operation • In the stapling operation, the 2 staples stapler motor drives the clincher side to press the paper.
  • Page 343 8. STAPLER Theory of Operation Ver. 1.0 Jan. 2009 B. Staple control (1) Stapling • After completing the alignment operation of the alignment plate, the 2 staples stapler motor performs the stapling operation. • The stapling operation is completed when the stapler position sensor/4 in the stapler detects the home position and turn ON.

  • Page 344: Theory Of Operation

    SERVICE MANUAL THEORY OF OPERATION 2009.01 Ver. 1.0...

  • Page 345: 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 346 Theory of Operation Ver. 1.0 Jan. 2009 CONTENTS SD-508 OUTLINE PRODUCT SPECIFICATION .................. 1 PAPER FEED PATH ....................3 Folding/saddle stitching ..................3 Tri-folding ......................4 CONFIGURATION/OPERATION CONFIGURATION ....................5 ALIGNMENT SECTION ..................6 Drive ........................6 Operation ......................7 4.2.1 Alignment ......................
  • Page 347 Theory of Operation Ver. 1.0 Jan. 2009 Blank Page...

  • Page 348: Outline

    Theory of Operation Ver. 1.0 Jan. 2009 1. PRODUCT SPECIFICATION OUTLINE PRODUCT SPECIFICATION A. Type Name Saddle sticher SD-508 Type Built into the finisher Installation Screwed to the finisher Document alignment Center Stapling function Center parallel two points B. Paper (1) Saddle stitching Type Plain paper, Thick paper 1, Thick paper 2...
  • Page 349 1. PRODUCT SPECIFICATION Theory of Operation Ver. 1.0 Jan. 2009 D. Operating environment • Conforms to the operating environment of the main body. E. Consumables • Staples 5000 (MS-5C) NOTE • These specifications are subject to change without notice.

  • Page 350: Paper Feed Path

    Theory of Operation Ver. 1.0 Jan. 2009 2. PAPER FEED PATH PAPER FEED PATH Folding/saddle stitching A11RT1C001DA...

  • Page 351: Tri-Folding

    2. PAPER FEED PATH Theory of Operation Ver. 1.0 Jan. 2009 Tri-folding A11RT1C002DA...

  • Page 352: Configuration/Operation

    Theory of Operation Ver. 1.0 Jan. 2009 3. CONFIGURATION CONFIGURATION/OPERATION CONFIGURATION Alignment section Stapler Exit section A11RT2C001DA...

  • Page 353: Alignment Section

    4. ALIGNMENT SECTION Theory of Operation Ver. 1.0 Jan. 2009 ALIGNMENT SECTION Drive Alignment plate/R Alignment plate/F Center staple alignment Center staple alignment Leading edge motor/R (M21) motor/F (M20) stopper Leading edge stopper motor (M22) Leading edge stopper A11RT2C002DA...

  • Page 354: Operation

    Theory of Operation Ver. 1.0 Jan. 2009 4. ALIGNMENT SECTION Operation 4.2.1 Alignment • In the folding/saddle stitching/tri-folding mode, the center staple alignment motor/F and /R aligns paper. • The center staple alignment motor rotates in the forward/reverse direction to move the alignment plates and align paper.
  • Page 355 4. ALIGNMENT SECTION Theory of Operation Ver. 1.0 Jan. 2009 B. Alignment control • Transmitting the FNS signal from the main body, the center staple alignment motor/F and /R rotate to close the alignment plates, and then they stop the alignment plates at the standby position that is a little wider than the paper width.

  • Page 356: Stopper

    Theory of Operation Ver. 1.0 Jan. 2009 4. ALIGNMENT SECTION 4.2.2 Stopper • At the leading edge stopper, papers in sub scanning direction are aligned, and papers conveyed to the aligning section are conveyed to the specified position. • The exit grip holds the paper when shifting it to the specified position and when stapling papers.
  • Page 357 4. ALIGNMENT SECTION Theory of Operation Ver. 1.0 Jan. 2009 B. Stopper control (1) Folding mode • After a specified period of time since the last sheet of paper was aligned, the exit grip solenoid is turned ON and the sheets of paper are held in place. •...
  • Page 358 Theory of Operation Ver. 1.0 Jan. 2009 4. ALIGNMENT SECTION (2) Saddle stitching mode • After a specified period of time since the last sheet of paper was aligned, the exit grip solenoid is turned ON and the sheets of paper are held in place. •...
  • Page 359 4. ALIGNMENT SECTION Theory of Operation Ver. 1.0 Jan. 2009 (3) Tri-folding mode • After a specified period of time since the last sheet of paper was aligned, the exit grip solenoid is turned ON and the sheets of paper are held in place. •...

  • Page 360: Stapler

    Theory of Operation Ver. 1.0 Jan. 2009 5. STAPLER STAPLER Drive Stapler Center staple motor (M23) Clincher Timing belt Stapler home sensor (PS33) A11RT2C009DA...

  • Page 361: Operation

    5. STAPLER Theory of Operation Ver. 1.0 Jan. 2009 Operation 5.2.1 Stapler movement A. Stapler movement operation • The center staple motor moves the stapler. • The stapler and the clincher are mounted at the timing belt. • The stapler home sensor detects the distance between the stapler and the clincher. Staple motor (M24) Center staple motor (M23) Stapler...
  • Page 362 Theory of Operation Ver. 1.0 Jan. 2009 5. STAPLER B. Stapler movement control • At the moment when the center staple alignment motor /F is turned OFF, the center sta- ple motor starts rotating to move the stapler to the front side. •...

  • Page 363: Stapling

    5. STAPLER Theory of Operation Ver. 1.0 Jan. 2009 5.2.2 Stapling • The stapling operation is performed by the stapler motor and the clincher motor. A. Stapling operation • In the stapling operation, the stapler motor in the stapler pushes out the paper press sec- tion to the clincher by the cam mechanism to hold the paper and punch out the staple.
  • Page 364 Theory of Operation Ver. 1.0 Jan. 2009 5. STAPLER B. Staple control (1) Stapling • After completing the alignment operation of the alignment plate, the staple motor per- forms the stapling operation. • After a specified period of time, the clincher motor bends the staple. •...

  • Page 365: Folding/Saddle Stitching/Tri-Folding

    6. FOLDING/SADDLE STITCHING/TRI-FOLDING Theory of Operation Ver. 1.0 Jan. 2009 FOLDING/SADDLE STITCHING/TRI-FOLDING Drive Tri-folding change solenoid (SD5) Tri-folding gate Folding roller Folding knife Tri-folding roller Transport motor (M33) Center fold knife motor (M32) A11RT2C013DA...

  • Page 366: Operation

    Theory of Operation Ver. 1.0 Jan. 2009 6. FOLDING/SADDLE STITCHING/TRI-FOLDING Operation 6.2.1 Folding knife • The center fold knife motor drives the folding knife. • The folding knife is used in the folding/saddle stitching/tri-folding mode. • In the tri-folding mode, it is used at the 1st folding. A.

  • Page 367: Folding Transfer

    6. FOLDING/SADDLE STITCHING/TRI-FOLDING Theory of Operation Ver. 1.0 Jan. 2009 6.2.2 Folding transfer • The transport motor drives the folding roller. • Then, the folding roller drives the tri-folding roller. A. Folding transfer control • The center fold knife motor turns ON after a specified period of time since the leading edge stopper stops at the folding position.

  • Page 368: Tri-Folding Gate

    Theory of Operation Ver. 1.0 Jan. 2009 6. FOLDING/SADDLE STITCHING/TRI-FOLDING 6.2.3 Tri-folding gate • The tri-folding gate switches between the folding/saddle stitching path and the tri-folding path. • The tri-folding change solenoid drives the tri-folding gate. A. Tri-folding 2nd folding operation •...

  • Page 369: Exit Section

    7. EXIT SECTION Theory of Operation Ver. 1.0 Jan. 2009 EXIT SECTION Drive Lift up switch (SW3) Belt SD exit sensor/PR (PS29) SD exit full sensor (PS35) SD exit upper limit sensor (PS41) Exit motor (M34) SD exit sensor/LED (PS28) A11RT2C017DA...

  • Page 370: Operation

    Theory of Operation Ver. 1.0 Jan. 2009 7. EXIT SECTION Operation 7.2.1 Exit • Turn ON the exit motor to drive the belt and convey papers by each copy set. • Press the lift up switch of ahead of the exit tray to covey papers to ahead of the exit tray randomly.
  • Page 371 7. EXIT SECTION Theory of Operation Ver. 1.0 Jan. 2009 Blank Page...

  • Page 372: Theory Of Operation

    SERVICE MANUAL THEORY OF OPERATION 2009.01 Ver. 1.0...

  • Page 373: 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 374 Theory of Operation Ver. 1.0 Jan. 2009 CONTENTS PK-516 OUTLINE PRODUCT SPECIFICATION .................. 1 UNIT CONFIGURATION ..................2 PAPER PATH......................3 CONFIGURATION/OPERATION PUNCH SECTION ....................5 Configuration ......................5 Drive ........................6 4.2.1 Punch shift drive ................... 6 4.2.2 Punch drive ....................7 Operation ......................
  • Page 375 Theory of Operation Ver. 1.0 Jan. 2009 Blank Page...

  • Page 376: Outline

    Theory of Operation Ver. 1.0 Jan. 2009 1. PRODUCT SPECIFICATION OUTLINE PRODUCT SPECIFICATION A. Type Name Punch unit Type FS-integrated type punching operation device B. Functions Punching method Stops and punches every paper No. of holes 2-3 holes / 2-4 holes / 4 holes 2 holes / φ...

  • Page 377: Unit Configuration

    2. UNIT CONFIGURATION Theory of Operation Ver. 1.0 Jan. 2009 UNIT CONFIGURATION Punch section Punch scraps box section A11TT2C001DA...

  • Page 378: Paper Path

    Theory of Operation Ver. 1.0 Jan. 2009 3. PAPER PATH PAPER PATH Punch unit Paper path from the main body Punch scraps box A11TT2C002DA...
  • Page 379 3. PAPER PATH Theory of Operation Ver. 1.0 Jan. 2009 Blank Page...

  • Page 380: Configuration/Operation

    Theory of Operation Ver. 1.0 Jan. 2009 4. PUNCH SECTION CONFIGURATION/OPERATION PUNCH SECTION Configuration Punch unit Punch blade Entrance roller Punch blade Punch unit Front A11TT2E011DA NOTE • North America, Europe and Sweden are same configuration except for a number of blades.

  • Page 381: Drive

    4. PUNCH SECTION Theory of Operation Ver. 1.0 Jan. 2009 Drive 4.2.1 Punch shift drive Punch oscillating motor (M302) Belt Guide shaft Punch blade Rack Front Punch unit A11TT2E012DA...

  • Page 382: Punch Drive

    Theory of Operation Ver. 1.0 Jan. 2009 4. PUNCH SECTION 4.2.2 Punch drive A. North America (2 to 3 holes) Punch drive motor (M301) Punch blades for Punch blades for the 3-hole punch the 2-hole punch Slot Front Punch drive plate A11TT2E013DA B.
  • Page 383 4. PUNCH SECTION Theory of Operation Ver. 1.0 Jan. 2009 C. PK-516 for Sweden (4 holes) Punch drive motor (M301) Punch blades for the 4-hole punch Slot Front Punch drive plate A11TT2E015DA...

  • Page 384: Operation

    Theory of Operation Ver. 1.0 Jan. 2009 4. PUNCH SECTION Operation 4.3.1 Punch standby position movement control Turning ON the device, the punch oscillating motor rotates to move the punch unit to the home position until the PK punch oscillating home sensor turns ON. After selecting a punch mode, one of five sensors corresponded to each paper size detects a paper and the punch unit is shifted.

  • Page 385: Punch Position Correction Control

    4. PUNCH SECTION Theory of Operation Ver. 1.0 Jan. 2009 4.3.2 Punch position correction control For the punch unit positioned from the side edge of the paper to the inside, the punch posi- tion is adjusted in the following procedure so that punching is made to the center of paper at all times.

  • Page 386: Punch Control

    Theory of Operation Ver. 1.0 Jan. 2009 4. PUNCH SECTION 4.3.3 Punch control A. Registration loop control The transport motor/1 turns OFF temporarily to stop conveyance of paper when the speci- fied time has passed since paper exit sensor detected the leading edge of the paper. Thus the paper is pressed against the entrance roller forming a loop to correct the bend.
  • Page 387 4. PUNCH SECTION Theory of Operation Ver. 1.0 Jan. 2009 B. Punch control Transmitting the start signal from the main body, the transport motor/1 rotates. In the punch mode, the transport motor/1 stops temporarily a specified period of time after the FNS pass sensor detects the trailing edge of the paper.
  • Page 388 Theory of Operation Ver. 1.0 Jan. 2009 4. PUNCH SECTION Europe (2 to 4 holes) Punch driver motor (M301) Punch blade Punch unit PK punch home Punch drive plate Slot sensor (PS301) Front A11TT2E019DA...
  • Page 389 4. PUNCH SECTION Theory of Operation Ver. 1.0 Jan. 2009 Sweden (4 holes) Punch driver motor (M301) Punch blades Punch unit Punch drive plate Slot PK punch home sensor (PS301) Front A11TT2E020DA...

  • Page 390: Punch Scraps Box Section

    Theory of Operation Ver. 1.0 Jan. 2009 5. PUNCH SCRAPS BOX SECTION PUNCH SCRAPS BOX SECTION Configuration PK punch scraps box full sensor (PS302) Punch scraps box Front PK punch scraps box set sensor (PS304) A11TT2E021DA Drive • The punch scraps box section comprises no moving parts. Operation 5.3.1 Punch scraps box control...
  • Page 391 5. PUNCH SCRAPS BOX SECTION Theory of Operation Ver. 1.0 Jan. 2009 Blank Page...
  • Page 392 SERVICE MANUAL THEORY OF OPERATION 2009.01 Ver. 1.0...
  • Page 393 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 394 Theory of Operation Ver. 1.0 Jan 2009 CONTENTS AU-101/AU-102/AU-201/OT-503 AU-101/AU-102 CONFIGURATION ....................1 OPERATION ......................1 AU-201 CONFIGURATION ....................2 OPERATION ......................2 OT-503 CONFIGURATION ....................3 OPERATION ......................3...
  • Page 395 Theory of Operation Ver. 1.0 Jan 2009 Blank Page...

  • Page 396: Configuration

    Theory of Operation Ver. 1.0 Jan. 2009 1. CONFIGURATION AU-101/AU-102 CONFIGURATION Ultra-red LED Finger Vein image Camera A00JT2C256AA Authentication unit (AU-101) Vein Finger Authentication unit (AU-102) A0P0T2C581AA OPERATION • A finger vein pattern is used for personal identification. • Vein patterns are inside the body and cannot be visually recognized. This makes vein patterns extremely difficult to forge or falsify.

  • Page 397: Configuration

    3. CONFIGURATION Theory of Operation Ver. 1.0 Jan. 2009 AU-201 CONFIGURATION Abcde Fgdhi ABCDE_Co. Non-contact IC card Authentication unit (AU-201) A00HT2C302AA OPERATION • A non-contact IC card, such as an employee ID card, is used for personal identification. • The system supports the communications protocol in compliance with Type A, Type B, and Felica (Type C) of ISO14443.
  • Page 398 Theory of Operation Ver. 1.0 Jan. 2009 5. CONFIGURATION OT-503 CONFIGURATION Fan unit Paper exit tray A092T2C501AA OPERATION • Output Tray OT-503 is comprised a fan unit and a paper exit tray. • In order to avoid toner adhesion to other things, three tucking fan motors installed in the fan unit send outside air to an ejected paper for cool it down.
  • Page 399 6. OPERATION Theory of Operation Ver. 1.0 Jan. 2009 Blank Page...
  • Page 400 © 2009 KONICA MINOLTA BUSINESS TECHNOLOGIES, INC. © 2009 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 DDA0P0-M-TE1 DDA0P0-M-TE1 avoid disclosure of confidential information.

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