Konica Minolta BIZHUB 162 Service Manual
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Konica Minolta BIZHUB 162 Service Manual

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SERVICE MANUAL
THEORY OF OPERATION
2005.04
2005.04
Ver. 1.0
Ver. 1.0

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Summary of Contents for Konica Minolta BIZHUB 162

  • Page 1 SERVICE MANUAL THEORY OF OPERATION 2005.04 2005.04 Ver. 1.0 Ver. 1.0...

  • Page 2: 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 3: 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 4 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 5 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 6 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 7 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 8 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 9 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 10 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 11: 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 12 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 13: Internal Laser Radiation

    SAFETY AND IMPORTANT WARNING ITEMS [4] Laser Safety • This is a digital machine certified as a Class 1 laser product. There is no possibility of danger from a laser, provided the machine is serviced according to the instruction in this manual.
  • Page 14 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 15 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 5 mW aallonpituus 770-795 nm VARNING!

  • Page 16: 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. 4035D510CA Laser Caution Label • A laser caution label is attached to the outside of the machine as shown below. 4035D509AA S-15...

  • Page 17: 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 18: 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. High voltage High temperature High voltage...
  • Page 19 SAFETY AND IMPORTANT WARNING ITEMS S-18...

  • Page 20: Main Unit

    SERVICE MANUAL THEORY OF OPERATION Main Unit 2005.04 Ver. 1.0...
  • Page 22 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 24: Table Of Contents

    Theory of Operation Ver. 1.0 Apr. 2005 CONTENTS Outline System configuration....................1 bizhub 210 ......................1 bizhub 162 ......................2 Product specification ....................3 Copier ........................3 Fax Kit (FK-505): (Option) ..................6 Cross sectional view....................7 Paper path....................... 8 Copy process ......................
  • Page 25 Theory of Operation Ver. 1.0 Apr. 2005 7.4.4 For Latin America area (Metric) ..............25 PH (Writing section) ....................26 Construction ....................... 26 Operation......................27 Imaging unit ......................28 Construction ....................... 28 Operation......................29 PC Drum......................30 Grounding of the PC Drum................. 30 PC Drum charging ....................
  • Page 26 18.2 Construction (for bizhub 210) ................52 18.3 Operation ......................53 18.4 Fusing Roller Pressure Mechanism..............53 18.5 Fusing Temperature Control (for bizhub 162) ............. 54 18.6 Fusing Temperature Control (for bizhub 210) ............. 55 18.7 PPM Control (bizhub 162 Only) ................56 Paper exit (for bizhub 162) ..................

  • Page 27: Theory Of Operation Ver. 1.0 Apr

    Theory of Operation Ver. 1.0 Apr. 2005 Blank page...

  • Page 28: System Configuration

    Theory of Operation Ver. 1.0 Apr. 2005 1. System configuration Outline System configuration bizhub 210 4034F1E501DA Automatic Document Feeder (DF-502) [10] Copy Table (DK-703)*3 Duplexing Document Feeder (DF-605) [11] Key Counter Kit Original Cover Kit (OC-504)*1 [12] 32MB Memory (EM-101) Job Separator (JS-503) [13] 64MB Memory (EM-102)

  • Page 29: Bizhub 162

    1. System configuration Theory of Operation Ver. 1.0 Apr. 2005 bizhub 162 4035T1E501DA Automatic Document Feeder (DF-502) Key Counter Kit Original Cover Kit (OC-504)*1 [10] 32MB Memory (EM-101) Job Separator (JS-503) [11] 64MB Memory (EM-102) Multiple Bypass (MB-501) [12] Printer Controller (IC-205)

  • Page 30: Product Specification

    Multiple Copies 1 to 99 Warm-up Time bizhub 210: 15 sec. or less (23 °C, Rated Voltage) bizhub 162: 30 sec. or less (23 °C, Rated Voltage) First Copy Time 7 sec. or less (A4/Letter, Paper Feed Tray/1, full size mode)
  • Page 31 1250 W (bizhub 210: 200 V area) Max. Current Consumption 1200 W (bizhub 210: 120 V area) (full system) 1050 W (bizhub 162: 200 V area) 1000 W (bizhub 162: 120 V area) 5.5 A (bizhub 210: 200 V area) Current Consumption...
  • Page 32 38 kg <GDI Printer Functions> Printing Speed bizhub 210: 21 printed pages/min (A4, 300 dpi) 12 printed pages/min (A4, 600 dpi) bizhub 162: 16 printed pages/min (A4, 300 dpi) 12 printed pages/min (A4, 600 dpi) Memory Shared with the copier Interface IEEE 1284 (parallel), USB Revision 1.1 (except for Windows 95 and...

  • Page 33: Fax Kit (Fk-505): (Option)

    2. Product specification Theory of Operation Ver. 1.0 Apr. 2005 Fax Kit (FK-505): (Option) General Compatibility Scanning Resolution TX Mode Resolution CD direction (dpi) FD direction (dpi) Memory TX FINE S_FINE Non memory TX FINE S_FINE Line PSTN/ PBX Data Transmission Rate 33.6 kbps (V.34 JBIG) Coding Method MH/ MR/ MMR/ JBIG...

  • Page 34: Cross Sectional View

    Theory of Operation Ver. 1.0 Apr. 2005 3. Cross sectional view Cross sectional view 4034G502BA Automatic Document Feeder DF-502 Paper Feed Unit PF-502 (Option) (Option) Scanner Copy Table DK-703 (Option) Job Separator JS-503 (Option) Paper Feed Tray/1 Fusing Unit [10] PH Unit Image Transfer Section [11]...

  • Page 35: Paper Path

    4. Paper path Theory of Operation Ver. 1.0 Apr. 2005 Paper path 4034G503BA...

  • Page 36: Copy Process

    Theory of Operation Ver. 1.0 Apr. 2005 5. Copy process Copy process Copy Process Overview 4034M544CA 1. PC Drum • Made up of an aluminum pipe coated with a photoconductive layer, on which an electro- static latent image is formed. 2.
  • Page 37 5. Copy process Theory of Operation Ver. 1.0 Apr. 2005 10. Image Transfer • A DC positive charge is applied to the Image Transfer Roller to transfer the visible image on the surface of the PC Drum onto the paper. 11.

  • Page 38: Image Forming Process

    Theory of Operation Ver. 1.0 Apr. 2005 5. Copy process Image Forming Process Step Process Function Step 1 Drum charging Forms a charge layer on the surface of the PC Drum. Forms an electrostatic latent image on the surface of Step 2 Exposure the PC Drum.

  • Page 39: Exposure Process (Step 2)

    5. Copy process Theory of Operation Ver. 1.0 Apr. 2005 Exposure Process (Step 2) • The surface of the PC Drum is irradiated with light reflected off the original, which forms an electrostatic latent image. PH Unit 4034G506AA Laser Beam Developing Process (Step 3) •...

  • Page 40: Image Transfer Process (Step 4)

    Theory of Operation Ver. 1.0 Apr. 2005 5. Copy process Image Transfer Process (Step 4) • The Image Transfer Roller applies charge from the backside of the paper, thereby trans- ferring toner on the surface of the PC Drum to the paper. Charge Neutralizing Plate Image Transfer Roller Paper...

  • Page 41: Fusing Process (Step 6)

    5. Copy process Theory of Operation Ver. 1.0 Apr. 2005 Fusing Process (Step 6) • The Fusing Unit consists of the Fusing Roller and the Fusing Roller/rt. • The Fusing Roller is provided with two Fusing Heater Lamps, thereby shortening the time required for warming-up and saving energy.

  • Page 42: Charge Neutralizing Process (Step 8)

    Theory of Operation Ver. 1.0 Apr. 2005 5. Copy process 5.10 Charge Neutralizing Process (Step 8) • Any potential remaining on the surface of the PC Drum is neutralized by the Erase Lamp. Residual Potential Erase Lamp PC Drum 4030G511AA 5.11 Image Transfer Roller Cleaning Process (Step 9) •...

  • Page 43: Toner Recovery Process (Step 10)

    5. Copy process Theory of Operation Ver. 1.0 Apr. 2005 5.12 Toner Recovery Process (Step 10) • Toner scraped off by the Cleaning Blade is transported back to the Developing Unit by the Toner Recycling Coil. Recycled Toner Agitating Blade Recycled Toner Conveying Screw PC Drum 4021M039AA...

  • Page 44: Composition/Operation

    Theory of Operation Ver. 1.0 Apr. 2005 6. Overall configuration Composition/Operation Overall configuration Timing Chart at Power ON 4034M537CA...

  • Page 45: Control Block Diagram

    6. Overall configuration Theory of Operation Ver. 1.0 Apr. 2005 Control Block Diagram 4034M538CA...

  • Page 46: Scanner (Ir)

    Theory of Operation Ver. 1.0 Apr. 2005 7. Scanner (IR) Scanner (IR) Construction 4035M528AC Name Function/System Scanner Motor (M5) Drives the Scanner Assy and the 2nd/3rd Mirrors Carriage. Converts light reflected off the mirror to a corresponding CCD Board (PWB-J) electric signal.

  • Page 47: Mechanism And Control For Moving The Scanner And Mirrors Carriage

    7. Scanner (IR) Theory of Operation Ver. 1.0 Apr. 2005 Mechanism and Control for Moving the Scanner and Mirrors Carriage 7.2.1 Scanner Moving Mechanism/Control • The Scanner is moved by the Scanner Motor at a given speed. • The Scanner Home Position Sensor detects the Scanner at its home position. •...
  • Page 48 Theory of Operation Ver. 1.0 Apr. 2005 7. Scanner (IR) <Making copiers using DF-502> 4034T2E501DA 1. When the original is loaded and the Start key pressed, the Scanner performs shad- ing. 2. The Scanner then moves to the scanning position under the ADF glass. The original is scanned as it is moved.

  • Page 49: Original Size Detection

    7. Scanner (IR) Theory of Operation Ver. 1.0 Apr. 2005 Original Size Detection • Original Size Sensor 1 and the CCD mounted in the optical section are used to detect the size of the original. UN3 (Option) 4035M528AA...

  • Page 50: Determination Of Original Size

    Theory of Operation Ver. 1.0 Apr. 2005 7. Scanner (IR) Determination of Original Size • The Original Size Sensor is used to determine the size of the original. • Two size conversion patterns are available depending on the applicable marketing area. Refer to the Field Service (CCD APS SIZE) for setting.

  • Page 51: For Latin America Area (Inch)

    7. Scanner (IR) Theory of Operation Ver. 1.0 Apr. 2005 Pattern 2 Original Size ~143.9 ~153.0 ~187.0 ~200.0 ~213.0 ~220.9 ~225.0 ~262.0 ~274.7 ~284.4 284.5 Sensor UN2 *UN3 Invoice Letter OFF OFF A5 R B5 R 16K R A4 R Letter 11×17 Legal...

  • Page 52: For Latin America Area (Metric)

    Theory of Operation Ver. 1.0 Apr. 2005 7. Scanner (IR) 7.4.4 For Latin America area (Metric) Pattern 1 Original Size ~153.0 ~187.0 ~200.0 ~215.0 ~225.0 ~262.0 ~275.0 275.1 Sensor *UN3 – A5 R B5 R 16K R A4 R – Pattern 2 Original Size ~143.9...

  • Page 53: Ph (Writing Section)

    8. PH (Writing section) Theory of Operation Ver. 1.0 Apr. 2005 PH (Writing section) Construction 4035M003AB Name Function/System Allows the surface of the PC Drum to be irradiated with a laser Polygon Motor (M1) beam so that an image is formed. Keeps constant the polarization angular velocity of the laser fθ...

  • Page 54: Operation

    Theory of Operation Ver. 1.0 Apr. 2005 8. PH (Writing section) Operation • When a laser beam strikes the Polygon Mirror, light reflected off the Polygon Mirror is directed at the PC Drum by way of the lens and return mirror. •...

  • Page 55: Imaging Unit

    9. Imaging unit Theory of Operation Ver. 1.0 Apr. 2005 Imaging unit Construction 4034M539AA Name Function/System PC Drum Paper Separator Fin- Mechanically separate the paper from the surface of the PC gers Drum. Forms an electrostatic latent image on the surface of the PC PC Drum Drum.

  • Page 56: Operation

    Theory of Operation Ver. 1.0 Apr. 2005 9. Imaging unit Operation • The Main Motor provides drive for the PC Drum, Developing Roller, and other mechani- cal components. 4035M006AA Recycled Toner Conveying Screw Developing Roller Recycled Toner Recycling Coil Main Motor (M1) 2nd Toner Conveying Roller...

  • Page 57: Pc Drum

    9. Imaging unit Theory of Operation Ver. 1.0 Apr. 2005 PC Drum • The PC Drum used in this copier is the organic photoconductor (OPC). ✽ The drum is a lamination of the Charge Transport Layer and Charge Generating Layer coating an aluminum alloy base.

  • Page 58: Pc Drum Charging

    Theory of Operation Ver. 1.0 Apr. 2005 10. PC Drum charging 10. PC Drum charging • The surface of the PC Drum is deposited with charge through corona discharge from the PC Drum Charge Corona. • The grid mesh interposed between the corona wire and the PC Drum ensures that a uni- form charge is deposited across the entire surface of the PC Drum.

  • Page 59: Developing

    11. Developing Theory of Operation Ver. 1.0 Apr. 2005 11. Developing 11.1 Developing Roller • The Developing Roller consists of an outer sleeve roller and an inner magnet roller. • The roller conveys developer to the point of development. • The developer (carrier and toner) in the Developer Mixing Chamber is conveyed onto the point of development by the Toner Conveying Rollers and the Developing Roller.

  • Page 60: Atdc Sensor

    Theory of Operation Ver. 1.0 Apr. 2005 11. Developing 11.3 ATDC Sensor • The ATDC Sensor detects the toner-to-carrier ratio (T/C) of the developer in the Devel- oper Mixing Chamber. 3rd Toner Conveying Roller Developing Roller 2nd Toner Conveying Roller 1st Toner Conveying Roller ATDC Sensor 4021M019AA...

  • Page 61: Toner Replenishing

    12. Toner replenishing Theory of Operation Ver. 1.0 Apr. 2005 12. Toner replenishing 12.1 Toner Replenishing Mechanism • Toner is supplied from the Toner Bottle to the Developer Mixing Chamber. 1. The Toner Replenishing Motor (M6) turns the coupling, which turns the Toner Bot- tle.

  • Page 62: Toner Replenishing Control

    Theory of Operation Ver. 1.0 Apr. 2005 12. Toner replenishing 12.2 Toner Replenishing Control • Replenishing of the supply of toner is determined based on the T/C ratio and B/W ratio. • If T/C is 14 % or more, toner replenishing is not carried out regardless of the B/W value. •...

  • Page 63: T/C Recovery Mode

    12. Toner replenishing Theory of Operation Ver. 1.0 Apr. 2005 12.3 T/C Recovery Mode The machine enters the T/C recover mode when a T/C of 10 % or less is detected. Toner is replenished for 90 sec. T/C is recovered by 1 % or more. T/C is not recovered by 1 % or more, or T/C is less than 12 %.

  • Page 64: Toner Bottle Home Position Detection

    Theory of Operation Ver. 1.0 Apr. 2005 12. Toner replenishing 12.4 Toner Bottle Home Position Detection • The Toner Supply Port is on the upper side whenever the Toner Bottle is at its home posi- tion. The Toner Bottle Home Position Sensor (PC7) detects the Toner Bottle at its home position.

  • Page 65: Toner Recovery

    13. Toner recovery Theory of Operation Ver. 1.0 Apr. 2005 13. Toner recovery • The Cleaning Blade is used to scrape residual toner off the surface of the PC Drum. • The spent toner is conveyed through the Recycling Duct and eventually back to the Developer Mixing Chamber.

  • Page 66: Synchronizing Roller Section

    Theory of Operation Ver. 1.0 Apr. 2005 14. Synchronizing roller section 14. Synchronizing roller section 14.1 Construction • The Synchronizing Roller ensures that the paper is fed off from the transport section in time with the exposure timing of the exposure section (PH). 4035M011AA Name Function/System...

  • Page 67: Operation

    14. Synchronizing roller section Theory of Operation Ver. 1.0 Apr. 2005 14.2 Operation • Drive from the Main Motor (M1) is transmitted through a gear train to the Synchronizing Roller Clutch (CL1). 4035M012AA Main Motor (M1) Synchronizing Roller Clutch (CL1) 14.3 Paper Dust Remover •...

  • Page 68: Image Transfer And Paper Separation Section

    Theory of Operation Ver. 1.0 Apr. 2005 15. Image transfer and paper separation section 15. Image transfer and paper separation section 15.1 Image Transfer Section • A positive charge is applied to the Image Transfer Roller to transfer the toner image formed on the surface of the PC Drum onto the paper.

  • Page 69: Paper Take-Up

    16. Paper take-up Theory of Operation Ver. 1.0 Apr. 2005 16. Paper take-up 16.1 Construction 4021M025AA Paper Size Detecting Board (PWB-I) Feed Roller/1 Paper Size Detecting Sensor (S11) Separation Roller/1 Paper Empty Sensor/1 (PC4) Paper Lifting Plate...

  • Page 70: Operation

    Theory of Operation Ver. 1.0 Apr. 2005 16. Paper take-up 16.2 Operation • The Main Motor (M1) provides the drive for paper take-up operations. • The drive is transmitted through the Paper Take-up Solenoid/1. Main Motor (M1) Paper Take-up Solenoid/1 (SL1) Feed Roller 4021M027AA...

  • Page 71: Paper Separating Mechanism

    16. Paper take-up Theory of Operation Ver. 1.0 Apr. 2005 16.2.1 Paper Separating Mechanism • The coefficient of friction between the Feed Roller and Separation Roller is effectively used to prevent double feed of paper. When one sheet of paper is taken up: The coefficient of friction on the front side of the sheet of paper taken up and fed through the space between the Feed Roller and Separation Roller is the same as that on the back- side of the sheet of paper, allowing the paper to be properly fed into the machine.

  • Page 72: Drawer In Position Detection

    Theory of Operation Ver. 1.0 Apr. 2005 16. Paper take-up 16.3 Drawer in Position Detection • When the drawer is slid into the copier, the light blocking plate blocks the Set Sensor. The copier then knows that the drawer has been slid in position. Drawer Set Sensor (PC5) 4021M026AA 16.4 Paper Empty Detection Mechanism...

  • Page 73: Paper Lifting Plate

    16. Paper take-up Theory of Operation Ver. 1.0 Apr. 2005 16.5 Paper Lifting Plate • The Paper Lifting Plate is locked into position when it is pressed down. It is unlocked when the tray is slid into the unit. • The Paper Lifting Plate is pushed upward by the Paper Lifting Springs at all times. Spring Paper Lifting Plate 4021M063AA...

  • Page 74: On/Off Positions Of Paper Size Detecting Switches And Corresponding Paper Size Detected

    Theory of Operation Ver. 1.0 Apr. 2005 16. Paper take-up 16.6.1 ON/OFF Positions of Paper Size Detecting Switches and Corresponding Paper Size Detected <For Metric> Paper Size Detecting Board Paper Size Detecting PWB-I Paper Size Sensor S11 – – – –...

  • Page 75: Paper Take Up Control

    16. Paper take-up Theory of Operation Ver. 1.0 Apr. 2005 16.7 Paper Take Up Control Start Key ON Main Motor M1 Paper Take-Up Solenoid SL1 Synchronizing Roller Sensor PC1 4021M515CA 16.7.1 Paper Take Up Retry Control • To minimize the occurrence of a paper misfeed, the paper take-up sequence is tempo- rarily halted if the paper fails to reach the Synchronizing Roller Sensor within a given period of time after the sequence has been started.

  • Page 76: Manual Bypass Section

    Theory of Operation Ver. 1.0 Apr. 2005 17. Manual bypass section 17. Manual bypass section 17.1 Operation • Drive for bypass paper take-up is provided by the Main Motor (M1). • The drive is transmitted through the Paper Take-up Solenoid/Bypass. Main Motor (M1) Paper Set Sensor/Bypass (PC2) Paper Take-up Solenoid/Bypass (SL2)

  • Page 77: Manual Feed Take Up Control

    17. Manual bypass section Theory of Operation Ver. 1.0 Apr. 2005 17.3 Manual Feed Take Up Control 4034M539CA...

  • Page 78: Fusing Unit Section

    Theory of Operation Ver. 1.0 Apr. 2005 18. Fusing unit section 18. Fusing unit section 18.1 Construction (for bizhub 162) • Heat and pressure from the Fusing Roller permanently fuse toner onto the paper. 4034M523BA Fusing Roller Heater Lamp (H1)

  • Page 79: Construction (For Bizhub 210)

    18. Fusing unit section Theory of Operation Ver. 1.0 Apr. 2005 18.2 Construction (for bizhub 210) • Heat and pressure from the Fusing Roller permanently fuse toner onto the paper. 4034M523CA 5, 6 Fusing Roller Sub Heater Lamp (H2) Fusing Roller Thermistor (TH1) Fusing Roller Heater Lamp (H1) Fusing Roller Sub Thermistor (TH2) Fusing Roller/rt...

  • Page 80: Operation

    Theory of Operation Ver. 1.0 Apr. 2005 18. Fusing unit section 18.3 Operation • The Main Motor (M1) provides the drive for the Fusing Unit. Main Motor (M1) Fusing Roller/rt Fusing Roller 4035M007AA 18.4 Fusing Roller Pressure Mechanism • To provide a nip width between the rollers, a Pressure Spring is used functioning to press the Fusing Roller/rt up against the Fusing Roller.

  • Page 81: Fusing Temperature Control (For Bizhub 162)

    18. Fusing unit section Theory of Operation Ver. 1.0 Apr. 2005 18.5 Fusing Temperature Control (for bizhub 162) • The Fusing Roller Heater Lamp is turned ON and OFF to keep a set temperature on the surface of the Fusing Roller.

  • Page 82: Fusing Temperature Control (For Bizhub 210)

    Theory of Operation Ver. 1.0 Apr. 2005 18. Fusing unit section 18.6 Fusing Temperature Control (for bizhub 210) • The Fusing Roller Heater Lamp is turned ON and OFF to keep a set temperature on the surface of the Fusing Roller. •...

  • Page 83: Ppm Control (Bizhub 162 Only)

    18. Fusing unit section Theory of Operation Ver. 1.0 Apr. 2005 18.7 PPM Control (bizhub 162 Only) • If paper of a small size (width of 250 mm or less) or thick paper is used to run a multi- copy cycle, the temperature on the edges of the Fusing Rollers tends to run high, mean- ing that the temperature of the Fusing Rollers varies among different spots of the rollers.

  • Page 84: Paper Exit (For Bizhub 162)

    Theory of Operation Ver. 1.0 Apr. 2005 19. Paper exit (for bizhub 162) 19. Paper exit (for bizhub 162) 19.1 Construction 4035M008AB Main Motor (M1) Exit Roller 19.2 Operation • The Main Motor (M1) provides the drive for the exit section.

  • Page 85: Paper Exit (For Bizhub 210)

    20. Paper exit (for bizhub 210) Theory of Operation Ver. 1.0 Apr. 2005 20. Paper exit (for bizhub 210) 20.1 Construction 4034M545CA Duplex Unit Switchback Motor (M31) Exit Roller 20.2 Operation • The exit rollers are driven by the Duplex Unit Switchback Motor (M31). 4034M546CA...

  • Page 86: Image Stabilization System

    Theory of Operation Ver. 1.0 Apr. 2005 21. Image stabilization system 21. Image stabilization system • The following image stabilization controls are provided to ensure stabilized copy image. Purpose Means Control The Vg/Vb control voltage is varied to bring Vg/Vb to an appropriate level according to the following settings.

  • Page 87: Others

    22. Others Theory of Operation Ver. 1.0 Apr. 2005 22. Others 22.1 Fan Control 22.1.1 Power Supply Section Cooling Mechanism • A cooling fan motor draws air from the area around the Power Supply Unit to the outside to prevent the Power Supply Unit temperature from running high. •...

  • Page 88: Fusing Section Cooling Mechanism

    Theory of Operation Ver. 1.0 Apr. 2005 22. Others 22.1.2 Fusing Section Cooling Mechanism • A fan motor draws air from the area around the Fusing Unit to the outside to prevent the machine interior temperature from running high. In addition, the fan motor pulls paper being transported up through suction force to help stabilize paper transport.
  • Page 89 22. Others Theory of Operation Ver. 1.0 Apr. 2005 Blank page...

This manual is also suitable for:

Bizhub 210

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