Canon FY8-13EX-000, NP6218 instruction

CHAPTER 6 FIXING SYSTEM

C. Controlling the Supply Power for the Fixing Heater

The temperature of the fixing heater is controlled by controlling the power supplied to the fixing heater.

The resistance of the plane-shaped heater used as the fixing heater may show some variation depending on which production lot it comes from.

For this reason, whenever you have replaced the copier’s heater, you must store the resistance value in service mode (No. 304; see p. 10-31); this way, the microprocessor on the DC controller PCB can exert proper control over power.

Caution:

The resistance of the fixing heater is stored in service mode at the time the copier is shipped out of the factory; do not change it unless you have replaced the fixing heater.

The power of the fixing heater is controlled by a phase power control method.

The microprocessor controls the output timing of the fixing heater drive signal (HTRD) so that power that suits the target temperature of the fixing heater may be supplied to the heater (potential control of the supply power).

HTRD

Supply power to heater

Figure 6-104

COPYRIGHT © 1997 CANON INC.

CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)

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Image 171

Canon FY8-13EX-000, NP6218 service manual Controlling the Supply Power for the Fixing Heater

Contents

FY8-13EX-000 Copyright 1997 Canon INC Introduction Copyright 1997 Canon INC Iii System Configuration General Description Copyright 1997 Canon INC Contents Image Formation System Exposure System Vii PICK-UP/FEEDING System Viii Fixing System Installation Maintenance and ServicingEXTERNALS/AUXILIARY Mechanisms II. Standards and ADJUSTMENTS..10-5 Troubleshooting Arrangement and Functions Xii Appendix Chapter General Description Office amenities and ecology FeaturesPractical basic features Multiple front loading and multifeeder for space saving System II. SpecificationsCopier Type Features 201 Standard Reproduction Ratios Others 202 Copying Speed Cassette Feeding Module-B2/Cassette Feeding Module-A2 Exterior View III. Names of Parts Body Cross Section Cassette Feeding Module-A2 Control Panel IV. Operation Operation Mode Making Two-Sided/Overlay Copies manual Outline User Mode Changing the Auto Clear Time Common Operations Keys to Use in User ModeChanging the Auto Power-Off Time Operation Reference Zoom Fine-Adjustment Turning On and Off the Auto Cassette Change Mechanism Cleaning the Feeder with ADF installed-option Initializing User Mode Selecting the Density Adjustment Method for Standard Mode Quick Guide to User Mode Handling the Toner Bottle VI. Routine Maintenance by the User Outline VII. Image Formation General Description General Description Copyright 1997 Canon INC Chapter Basic Operation Functional Construction Basic Construction CPU Outline of the Electrical Circuitry Stby Intr Scfw Scrv Lstr AER Basic Sequence of Operations 2 copies continuous, AE Mechanism Main Motor Control Circuit Inputs to the DC Controller PCB 1/3 Inputs to the DC Controller PCB CSZ3 CSZ4 Inputs to the DC Controller PCB 2/3 Inputs to the DC Controller PCB 3/3 Outputs from the DC Controller PCB 1/3 Outputs from the DC Controller PCB Mfpucld Outputs from the DC Controller PCB 2/3 Hefd Outputs from the DC Controller PCB 3/3 CS2 Inputs to and Outputs from the 1-Cassette Unit Driver PCB C3VPD Inputs to and Outputs from the 2-Cassette Unit Driver PCB C2PUCLD Basic Operation Copyright 1997 Canon INC Chapter Exposure System Varying the Reproduction Ratio II. Lens Drive System Chsld Lens Motor Drive Circuit Keeping the Lens Motor StationaryDriving the Lens Motor Stby Intr Scfw Scrv Lstr AER Basic Sequence of Operations lens drive system non-Direct Driving the Scanner III. Scanning Drive System Basic Sequence of Operations scanner Relationship between the Scanner Sensor and Signals Driving the Scanner Motor Outline Exposure System IV. Disassembly and Assembly Scanner Drive AssemblyDetaching the Scanner Drive Motor Detaching the Scanner Cable Exposure System Assembling the Mirror Position Tool Routing the Scanner Cable Set screws Loosen the set Screw to free Totation Pulley Hook Wirespring Cable Frontrear Cleaning the Scanner No Mirror Detaching the Lens Drive Motor Lens Drive Assembly Exposure System Routing the Lens Cable 421 Lens Drive Assembly Adjusting the Position of the Change Solenoid Exposure System Copyright 1997 Canon INC Chapter Image Formation System Processes Composite Power Supply PCB DC controller PCB T101 On on Basic Sequence of Operations image formation system Flprht Controlling the Scanning Lamp Pre-Heating Control scanning lamp Turning On and Off the Scanning Lamp OFF Controlling the Intensity of the Scanning Lamp FL1 Controlling the Fluorescent Lamp Heater Fluorescent Lamp Protection Mechanism Fluorescent Lamp Automatic Mpwm Controlling the Primary Charging Roller Bias Turning On and Off the Primary Charging Roller Bias Image Formation System Reference Bias Atvc Cleaning BiasControlling the Transfer Roller Bias Transfer Bias Tfwon Tfwpwm Tfws Trevon Current Limiter Circuit transfer bias Current Limiter Circuit cleaning biasTurning On and Off the Transfer Roller Bias Controlling the Transfer Bias to a Constant Voltage Controlling the Static Eliminator Bias Ensuring Proper Separation of Thin Paper Switching the Static Eliminator Bias Voltage Level Bssld Controlling Blank Exposure Blanking Whiting of Non-Image Areas for Reduction Primary Charging Roller Cleaning Operation Controlling the Primary Corona Roller Cleaning Mechanism Releasing the Transfer Roller II. Developing Assembly and Cleaning Assembly Controlling the Toner Level Detection Stby Mpwm Controlling the Development Bias Turning On and Off the AC Component of the Development Bias Control Method Automatic Control of Copy Density 207 Area Read by the AE Sensor Reference AE Adjustment III. Disassembly and Assembly Illumination AssemblyDetaching the Scanning Lamp/Fluorescent Lamp Heater Image Formation System ~5mm 60mm 306 front view Detaching the Blank Exposure Assembly Detaching the Blank Exposure Lamp Detaching the Blank Shutter Solenoid 314a Positioning the Blank Shutter Solenoid Positioning the Left/Right Margin Routing the Blanking Cable Detaching the Drum Unit Drum Unit Cleaning Detaching the Primary Corona Assembly Primary Corona Assembly Cleaning the Cleaning Pad and the Primary Corona Roller Positioning the Solenoid for the Primary Charging Roller Transfer Charging Assembly Detaching the Transfer RollerAttaching the Drum Heater Image Formation System Image Formation System Removing the Developing Assembly Removing the Blade AssemblyDeveloping System Removing the Developing Cylinder Side Seal Image Formation System Image Formation System Installing the Side Seal and the Blade Assembly Image Formation System Chapter PICK-UP/FEEDING System PICK-UP/FEEDING System PS4 II. PICK-UP Operation Copier Sequence of Operations pick-up/feeding assembly A4, 2 copies Pick-Up Operation III. PICK-UP from the Cassette Feeding MODULE-A2 Intr Scfw Scrv Scfw Scrv Lstr Sequence of Operations cassette 2 A4, 2 copies PS5 IV. Multifeeder Identifying the Size of Paper on the Multifeeder Intr Scfw Scrv Scfw Lstr Sequence of Operations multifeeder A4, 2 copies Identifying the Cassette Size Guide plate horizontal Paper size lever Guide plate vertical VI. Identifying Jams Pre-Registration Delay Jam Pre-Registration Stationary Jam Pre-Registration Timing Jam Separation Stationary Jam Separation Delay Jam Delivery Stationary Jam Delivery Delay Jam VII. Disassembly and Assembly Pick-Up AssemblyDetaching the Pick-Up Roller Unit PICK-UP/FEEDING System PICK-UP/FEEDING System Detaching the Pick-Up Roller Detaching the Pick-Up Clutch Points to Note When Attaching the Pick-Up Roller Detaching the Separation Pad Pick-Up from the Cassette Adjusting the Left/Right Registration Detaching the Multifeeder Assembly Multifeeder Assembly Detaching the Multifeeder Pick-Up Roller Unit Detaching the Multifeeder Pick-Up Roller Front of copier Detaching the Multifeeder Drive Unit Detaching the Multifeeder Clutch Positioning the Multifeeder Assembly paper guide plate cam Adjusting the Left/Right Registration Registration Roller Assembly Detaching the Registration ClutchDetaching the Upper Registration Roller PICK-UP/FEEDING System Detaching the Lower Registration Roller Detaching the Feeding Belt Feeding Assembly PICK-UP/FEEDING System Cassette Feeding Module Detaching the Copier from the Cassette Feeding ModuleDetaching/Attaching the Pick-Up Roller Chapter Fixing System Basic Operations Pwsw Controlling the Fixing Heater Temperature Reference Controlling the Supply Power for the Fixing Heater Thermal Fuse FU1 Detecting Overheating at the End of the Fixing HeaterProtection Mechanism Thermistor TH1, TH2 Correcting Displacement of the Fixing Film OFF Fixing System Controlling the Fixing Film Motor II. Disassembly and Assembly Fixing AssemblyConstruction1 Detaching the Upper Fixing Unit Fixing System Fixing System Fixing System Fixing System Fixing System Fixing System Fixing System Points to Note When Attaching the Heater Connector Points to Note When Attaching the Fixing Film Adjusting the Fixing Film Drive Roller Pressure Points to Note When Replacing the Fixing Upper Unit Fixing System Detaching the Lower Fixing Unit Fixing System Adjusting the Lower Fixing Roller Nip Measuring the Nip Delivery Assembly Fixing System Copyright 1997 Canon INC Chapter Power Supply Power Supply Circuit Assembly EXTERNALS/AUXILIARY Mechanisms Copyright 1997 Canon INC Overcurrent in the Low-voltage Power Supply Detecting Errors in the Power Supply PCBError in the High-Voltage Output Data Low-Voltage Output Data Error Protection Mechanisms for the Power Supply Circuit External Covers Cover EXTERNALS/AUXILIARY Mechanisms Detaching the Control Panel Detaching the Exhaust Fan Fans Main Motor/Main Drive Assembly Detaching the Main Drive AssemblyDetaching the Main Motor Unit EXTERNALS/AUXILIARY Mechanisms Routing the Drive Belt Detaching the Pick-Up Drive Unit Cassette unit Detaching the Cassette Motor Detaching the Cassette Driver PCB Points to Note When Replacing the DC Controller PCB DC Controller PCBDetaching the DC Controller PCB Detaching the Composite Power Supply PCB Composite Power Supply PCB EXTERNALS/AUXILIARY Mechanisms Points to Note When Handling the Composite Power Supply PCB Intensity Sensor PCB Points to Note When Replacing the AE SensorPoints to Note When Replacing the Intensity Sensor AE Sensor PCB EXTERNALS/AUXILIARY Mechanisms Copyright 1997 Canon INC Chapter Installation Selecting the Site Unpacking and Removing Fixings II. Unpacking and Installing the Copier Installation Installation Turning On the Copier Installation Installation Checking the Images and Operations Attaching the Drum Unit Changing the Cassette Size A5 R A4 Set the paper size plates selected in step Direct position refers to III. Relocating the Copier IV. Replacing the Drum Unit Go through the following when replacing the drum unit Installation Installation Installing the Control Card IV N Installation Unpacking VI. Cassette Heater KIT 5 Installation PROCE- Dure Installation to a Cassette Feeding Module-A2/B2 Screws Tie-wrap Connector Cord clamp Copiers connector Molded member Copiers base plate Relay harness Installation VII. Installing the Remote Diagnostic Device Installation to the Copier Installation Installation SW2 SW3 LED1 LED2 LED3 BAT1 AII Bits on SW2 Setting SW2-3 Shift bit 6 of the DIP switch 2 !9on the RDD’s PCB to OFF Installation Installation Installation Chapter Maintenance and Servicing Periodically Replaced Parts Periodically Replaced Parts II. Durables Pick-up roller FB2-2251-000 100,000 III. Periodical Servicing IV. Servicing Chart Maintenance and Servicing Chapter Troubleshooting 10-1 Guide to Troubleshooting Tables 10-2 Maintenance and Inspection Image Adjustment Basic Procedure10-3 10-4 Periodical Servicing II. Standards and Adjustments Image Adjustment10-5 10-6 10-7 10-8 10-9 Adjusting the Left/Right Margin No left/right margin 10-10 Adjusting the Scanning Lamp Intensity 10-11 10-12 210 DC Controller PCB 10-13 10-14 Exposure System Routing the Scanner Drive Cable10-15 10-16 Adjusting the Scanner Cable Tension Assembling the Mirror Positioning Tool10-17 10-18 10-19 220 front view 10-20 Positioning the Change Solenoid 10-21 Image Formation System 10-22 Routing the Blank Shutter Cable 10-23 After Replacing the Drum Unit 10-24 10-25 Pick-Up/Feeding SystemOrientation of the Pick-Up Roller Orientation of the Multifeeder Pick-Up Roller 10-26 Positioning the Paper Guide Plate Cam multifeeder 10-27 Fixing System 10-28 236 rear view 10-29 Points to Note after Replacing the Fixing Upper Unit 10-30 Adjusting the Nip 10-31 Storing the Fixing Heater Resistance 240 Heater Stay Side Plate rear 10-32 Setting the Fixing Heater Temperature Control Value 10-33 Example 10-34 10-35 ElectricalAfter Replacing the PCB Clearing the Back-Up RAM 10-36 Checking the Photointerrupters 10-37 Copier PS9 10-38 10-39 Cassette Feeding Unit 10-40 10-41 10-42 10-43 Adjusting the Multifeeder Paper Width Sensor 10-44 Setting the Paper Size for the Universal Cassette Initial Checks III. Troubleshooting Image Faults 10-46 10-47 10-48 Samples of Image Faults Troubleshooting Faulty Images Copy is too light half-tone only10-49 10-50 10-51 10-52 10-53 Copy is foggy overall 10-54 Copy has black lines vertical, fine 10-55 Copy has white spot vertical Copy has white lines vertical 10-56 Copy has white spots horizontal 10-57 Back of the copy is soiled Copy has a fixing fault 15, 16, 17 The leading edge of the copy is displaced10-58 10-59 Copy has a blurred image 10-60 Copy is foggy horizontal 10-61 Copy has poor sharpness Copy is blank Copy is solid black10-62 10-63 IV. Troubleshooting MalfunctionsTroubleshooting Malfunctions E000 E001 E002, E00310-64 E004 E00710-65 E010 E03010-66 E064 E202 keys on control panel invalidated10-67 10-68 10. E21011. E220 12. E240 10-69 13. E26114. E710, E711, E712, E717 15. E803 10-70 AC power supply is absent 10-71 DC power supply is absent Blank shutter fails to move Photosensitive drum fails to rotate10-72 Pick-up operation fails from cassette Pick-up operation from the multifeeder fails10-73 Scanner fails to move forward/in reverse Registration roller fails to rotate10-74 Scanning lamp fails to turn on Lens fails to move10-75 10-76 Add paper indicator fails to turn offFixing heater fails to operate Pre-exposure lamp fails to turn on 10-77 Jam message fails to turn off Troubleshooting Feeding Problems Jams copy paper10-78 10-79 Pick-Up Assembly Fixing/Delivery Assembly Separation/Feeding Assembly 10-81 Feeding FaultsDouble feeding Wrinkling VI ARRANGEMENT/FUNCTIONS of the Electrical Parts Sensors10-82 10-83 10-84 Clutches, Solenoids, and Switches 10-85 10-86 Motors, Heaters, and Lamps 10-87 10-88 PCBs 10-89 10-90 Cassette Feeding Module A2 10-91 Photointerrupter Variable Resistors VR and Check Pins by PCB DC controller PCB10-92 10-93 Composite power supply PCB 10-94 VII. Service ModeUsing Service Mode Activating Service Mode Clearing Stored Error Code Selecting a Service ModeUsing Adjustment Mode 3 and Specification Mode Using Operation/Inspection Mode 10-96 Recording on the Service Mode Label 10-97 Control Display Mode 10-98 10-99 O Mode 10-100 No /202/203/204 Port C Digital Display 10-101 Port H Display 10-102 Adjustment Mode 10-103 10-104 10-105 Operation/Inspection Mode 10-106 10-107 Specification Settings Mode 10-108 Counter Mode 10-109 VIII. Self Diagnosis 10-110 E003 10-111 E210 10-112 10-113 E400 10-114 E500 10-115 10-116 Appendix A4, 2 copies, Direct, from copier cassette General Timing Chart Signals and Abbreviations Signals and Abbreviations General Circuit Diagram Copyright 1997 Canon INC Special Tools MEK SOLVENTS/OILS Canon INC This publication is printed on 70% reprocessed paper