Canon NP6251 manuals
NP6251
Table of contents
- system configuration
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Table Of Contents
- I. FEATURES
- II. SPECIFICATIONS
- Performance
- Others
- B. Paper Deck-A1
- III. NAMES OF PARTS
- B. Cross Section
- IV. OPERATING THE MACHINE
- B. Extended Modes
- C. User Mode
- V. ROUTINE MAINTENANCE BY THE USER
- VII. IMAGE FORMATION
- basic operation
- Holding Tray Feeding
- B. Outline of the Electrical Circuitry
- C. Basic Sequence of Operations
- Basic Sequence of Operations at Power-On (2/2)
- Basic Sequence of Operations
- Basic Sequence of Operations in Page Separation Mode
- D. Main Motor (M1) Control Circuitry
- Operation
- E. Inputs to the DC Controller
- F. Outputs from the DC Controller
- G. Inputs to and Outputs from Accessories
- I. OUTLINE OF OPERATION
- II. LENS DRIVE SYSTEM
- Moving the Lens
- III. SCANNER DRIVE SYSTEM
- Scanner Sensors and the Signals
- Movement of the Scanner in Page Separation Mode
- Cable
- Removing the Scanner Drive Cable
- Adjusting the Tension of the Scanner Drive Cable
- Adjusting the Scanner Home Position
- Positioning the Scanner Locking Solenoid (SL1)
- B. Lens Drive Assembly
- Removing the Lens Stage Temporarily
- Installing the Light-Blocking Belt Mount
- Removing the Lens X Direction Drive Motor
- Attaching the Lens X Direction Drive Belt
- Replacing the Light Blocking Belt
- Table Of Contents
- I. PROCESSES
- Control Method
- Potential Measurement Circuit
- B. Controlling the Intensity of the Scanning Lamp
- Auto Exposure Control
- Making Checks
- C. Controlling the Primary/Transfer Corona Current
- Controlling the Transfer Corona Current
- D. Controlling the Separation/Pre Transfer Corona Current
- Separation/ Pre-Transfer Corona Current
- of the Separation/Pre-Transfer Corona Current
- E. Controlling the Blanking Exposure Lamp (LED)
- f. drum heater circuit
- cleaning mechanism
- A. Scanning Lamp Assembly
- Removing the Thermal Fuse
- C. Pre-Exposure Lamp Unit
- D. Blanking Exposure Lamp Assembly
- E. Photosensitive Drum
- Replacing the Drum Heater
- F. Potential Sensor Assembly
- H. Pre-Transfer Charging Assembly
- Separation Charging Assembly
- J. Charging Wire
- Stringing the Grid Wire of the Primary Charging Assembly
- Adjusting the Height of the Charging Wire
- Cleaning the Primary Charging Assembly Anti-Stray Sheet
- K. Developing Assembly
- Removing the Blade Unit
- Cylinder and the Magnetic Seal
- Cleaning the Developing Assembly Anti-Stray Sheet
- L. Hopper Assembly
- M. Drum Cleaner
- Installing the Cleaning Blade
- Installing the Side Seal
- N. Separation Claw/Separation Claw Drive Assembly
- O. Waste Toner Feeding Assembly
- Table Of Contents
- I. PICK-UP/FEEDING SYSTEM
- II. CASSETTE PICK-UP
- Outline
- B. Cassette Lifter Operation
- C. Identifying the Size of Copy Paper in the Cassette
- Markings on the Width Guide Rail
- Paper Size
- Registering Paper Width Basic Value
- b. lifter operation
- d. high-speed pick-up
- V. CONTROLLING THE REGISTRATION CLUTCH
- VI. MAKING TWO-SIDED/OVERLAY COPIES
- Outline of Operation
- D. Reversal Delivery
- Sequence of Reversal Delivery Operations
- Sided/Overlay/Reversal Delivery Copies
- Jogging Plate and the Trailing Edge Guide Plate
- Detecting the Presence Absence of Copy Paper
- F. Re-Pick Up from the Holding Tray
- G. Skipping Operation
- Outline of Operations
- Skipping Operation (odd number of originals)
- Reversal Delivery
- VII. DETECTING JAMS
- Registration Roller Delay Jam
- Pick-Up Vertical Path Feeding 0/1 Delay Jam
- Pick-Up Vertical Path Feeding 2 through 4 Delay Jam
- Fixing Assembly Outlet Delay Jam
- External Delivery Delay Jam
- Internal Delivery Delay Jam
- Holding Tray Inlet Delay Jam
- Holding Tray Re-Pick Up Delay Jam
- Holding Tray Registration Stationary Jam
- VIII. DISASSEMBLY AND ASSEMBLY
- A. Multifeeder Assembly
- B. Front Paper Deck Assembly
- Removing the Pick-Up Roller
- Removing the Feeding Roller
- Adjusting the Pressure of the Separation Roller
- Orientation of the Separation Roller
- Roller of the Cassette/Deck Pick-Up Assembly
- Releasing Solenoid of the Cassette
- Removing the Pick-Up Assembly from the Copier
- Removing the Separation Roller
- Roller Assembly of the Left Deck Pick-Up Assembly
- Assembly
- Construction
- Removing the Registration Roller (upper rubber roller)
- Removing the Fixing/Feeding Unit
- Removing the Feeding Belt
- H. Holding Tray Assembly
- Removing the Holding Tray from the Copier
- Removing the Holding Tray Registration Paper Sensor
- Removing the Re-Pick Up Roller
- Removing the Holding Tray Y Motor
- Removing the Y Motor Home Position Sensor
- Roller/Separation Belt Assembly
- Removing the Separation Belt Assembly
- Paper Deflecting Plate Drive Solenoid
- Removing the Holding Tray X Motor
- Removing the Holding Tray Paper Jogging Solenoid
- Paper Jogging Guide Plate Assembly
- the Holding Tray Assembly Paper Jogging Guide Plate
- I. Holding Tray Feeding Assembly
- Holding Tray Feeding Assembly
- C. Controlling the Fixing Temperature
- D. Reciprocating Mechanism for the Main Thermistor (TH1)
- the Upper Separation Claw
- F. SSR Error Detection Circuit for the Fixing Heater
- G. Locking Operation (fixing/feeding unit)
- H. Error Detection Circuit
- Fixing Heater Error Activation Detection Circuit
- Motor Error Rotation Detection Circuit
- II. DISASSEMBLY AND ASSEMBLY
- A. Fixing Assembly
- Removing the Fixing Cleaning Belt
- Installing the Fixing Cleaning Belt
- Removing the Upper Fixing Unit
- Removing the Fixing Heater
- Installing the Fixing Heater
- Installing the Upper Fixing Roller
- Removing the Thermal Switch
- Removing the Lower Separation Claw Assembly
- Removing the Lower Roller
- Adjusting the Nip (tightening the pressure adjusting nut)
- Adjusting the Fixing Clutch
- B. Delivery Assembly
- Removing the Fixing/Feeding Assembly Locking Assembly
- Paper Sensor and the Internal Delivery Paper Sensor
- Removing the Internal Delivery Assembly Roller
- Table Of Contents
- I. CONTROL PANEL
- LCD Processing
- Automatic Control of LCD Contrast
- Touch Switch Inputs
- II. FANS
- III. POWER SUPPLY
- B. Power Supply Circuit
- C. Date/Time Display Power Supply
- IV. DISASSEMBLY AND ASSEMBLY
- A. External Covers
- Removing the Front Door
- Removing the Inside Upper Cover
- Removing the Fixing/Feeding Unit Front Cover
- Sliding Out the Hopper Assembly
- b. control panel
- c. door switch assembly
- d. fan unit
- Removing the Cleaner Fan
- Removing the Feeding Fan
- F. Main Motor Assembly
- G. Fixing/Waste Toner Drive Assembly
- H. Main Drive Assembly (drum developing)
- I. Vertical Path Drive Assembly
- J. Pick-Up Drive Assembly
- Removing
- K. Duplexing Drive (1) Assembly
- L. Lifter Drive Assembly
- M. Cassette Pick-Up Drive Assembly
- N. Attaching the Drive Belt
- O. DC Controller PCB
- P. DC Power Supply Assembly
- Q. High-Voltage Transformer Assembly
- R. Power Supply Inlet Assembly
- paper deck-a
- I. SIDE PAPER DECK
- Outputs from the Side Deck Driver (1/1)
- B. Pick-Up
- Sequence of Operations (deck pick-up)
- C. Detection of Paper for the Deck
- D. Deck Lifter
- Opening/Closing the Deck
- Sequence of Operations (deck opening/closing)
- Positioning the Roll
- C. Drive System
- Removing the Deck Main Motor (M101)
- Removing the Deck Lifter Motor (M102)
- Routing the Lifter Cable
- D. Feeding System
- Removing the Deck Pick-Up Roller
- Removing the Deck Feeding Roller
- Removing the Deck Separation Roller
- Adjusting the Deck Separation Roller Pressure
- E. Electrical System
- Table Of Contents
- I. SELECTING THE SITE
- II. UNPACKING AND INSTALLING
- A. Unpacking
- B. Installing the Scanner
- C. Installing the Fixing Assembly
- D. Installing the AP Kit and the Charging Assemblies
- E. Installing the Copy Tray
- Replacing the Delivery Roller Leaf Spring
- F. Checking the Developing Assembly
- G. Installing the Pick-Up Assembly
- H. Supplying Toner
- i. connecting the rdf connector
- III. RELOCATING THE MACHINE
- IV. INSTALLING THE CONTROL CARD V
- V. INSTALLING THE COPY DATA CONTROLLER-A1
- installation procedure
- B. Installing to the Copier
- C. Checking the Operation
- VI. INSTALLING THE REMOTE DIAGNOSTIC DEVICE II
- I. PERIODICALLY REPLACED PARTS
- II. CONSUMABLES AND DURABLES
- Table Of Contents
- a. image adjustment
- b. exposure system
- routing the scanner drive cable
- c. image formation system
- position of the roller electrode
- d. pick-up/feeding system
- e. fixing system
- f. electrical system
- a. initial checks
- b. sample image faults
- c. troubleshooting image faults
- a. troubleshooting malfunctions
- ac power is absent
- dc power supply is absent
- pick-up fails. (multifeeder)
- the vertical path roller fails to rotate
- the lens fails to move
- pick-up fails. (paper deck-a)
- a. copy paper jams
- pick-up assembly
- fixing/delivery assembly
- cleaning assembly
- b. feeding faults
- a. sensors
- c. motors and fans
- d. clutches
- f. pcbs
- g. paper deck-a
- check pins by pcb
- ac driver pcb
- control cpu pcb
- holding tray driver pcb
- potential measurement pcb
- hvt1 pcb
- hvt2 pcb
- lamp regulator pcb
- vii. service mode
- b. using service mode
- f. adjustment mode
- h. options mode
- i. counter mode
- viii. self diagnosis
- c. sorter
NP6251
Table of contents
- system configuration
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Table Of Contents
- I. FEATURES
- II. SPECIFICATIONS
- Performance
- Others
- B. Paper Deck-A1
- III. NAMES OF PARTS
- B. Cross Section
- IV. OPERATING THE MACHINE
- B. Extended Modes
- C. User Mode
- V. ROUTINE MAINTENANCE BY THE USER
- VII. IMAGE FORMATION
- basic operation
- I. BASIC MECHANISMS
- B. Outline of the Electrical Circuitry
- C. Basic Sequence of Operations
- Basic Sequence of Operations at Power-On (2/2)
- Basic Sequence of Operations
- Basic Sequence of Operations in Page Separation Mode
- D. Main Motor (M1) Control Circuitry
- Operation
- E. Inputs to the DC Controller
- F. Outputs from the DC Controller
- G. Inputs to and Outputs from Accessories
- I. OUTLINE OF OPERATION
- II. LENS DRIVE SYSTEM
- Moving the Lens
- III. SCANNER DRIVE SYSTEM
- Scanner Sensors and the Signals
- Movement of the Scanner in Page Separation Mode
- Cable
- Removing the Scanner Drive Cable
- Adjusting the Tension of the Scanner Drive Cable
- Adjusting the Scanner Home Position
- Positioning the Scanner Locking Solenoid (SL1)
- B. Lens Drive Assembly
- Removing the Lens Stage Temporarily
- Installing the Light-Blocking Belt Mount
- Removing the Lens X Direction Drive Motor
- Attaching the Lens X Direction Drive Belt
- Replacing the Light Blocking Belt
- Table Of Contents
- I. PROCESSES
- Control Method
- Potential Measurement Circuit
- B. Controlling the Intensity of the Scanning Lamp
- Making Checks
- C. Controlling the Primary/Transfer Corona Current
- Controlling the Transfer Corona Current
- D. Controlling the Separation/Pre Transfer Corona Current
- of the Separation/Pre-Transfer Corona Current
- E. Controlling the Blanking Exposure Lamp (LED)
- f. drum heater circuit
- cleaning mechanism
- a. scanning lamp assembly
- b. standard white plate
- c. pre-exposure lamp unit
- e. photosensitive drum
- f. potential sensor assembly
- h. pre-transfer charging assembly
- Outline
- k. developing assembly
- l. hopper assembly
- m. drum cleaner
- o. waste toner feeding assembly
- Table Of Contents
- b. cassette lifter operation
- b. lifter operation
- d. high-speed pick-up
- d. reversal delivery
- g. skipping operation
- vii. detecting jams
- registration roller delay jam
- viii. disassembly and assembly
- a. multifeeder assembly
- b. front paper deck assembly
- fixing system
- motor error rotation detection circuit
- Table Of Contents
- b. operation
- a. outline of power supply
- b. power supply circuit
- c. date/time display power supply
- b. control panel
- d. fan unit
- e. removing the counter assembly
- f. main motor assembly
- n. attaching the drive belt
- o. dc controller pcb
- r. power supply inlet assembly
- Table Of Contents
- b. pick-up
- c. detection of paper for the deck
- d. deck lifter
- f. controlling the deck motor
- b. paper deck
- c. drive system
- e. electrical system
- Table Of Contents
- a. image adjustment
- b. exposure system
- c. image formation system
- d. pick-up/feeding system
- e. fixing system
- f. electrical system
- a. initial checks
- b. sample image faults
- c. troubleshooting image faults
- a. troubleshooting malfunctions
- a. copy paper jams
- b. feeding faults
- f. pcbs
- check pins by pcb
- vii. service mode
- b. using service mode
- f. adjustment mode
- i. counter mode
- viii. self diagnosis
- c. sorter
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