SP C840DN/SP C842DN
  1. Replacement and Adjustment
  2. PCDU
  3. Notes when replacing a PCDU

For SP C840DN

  • Do not release the spring pressure in the PCDU for SP C840DN. If you have mistakenly released the spring pressure, attach the springs (Attaching the Spring after Mistakenly Releasing the Spring Pressure).

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  • Read This First
    • Symbols, Abbreviations and Trademarks
      • Symbols, Abbreviations
      • Trademarks
  • Product Information
    • Product Overview
      • Component Layout
      • Paper Path
      • Drive Layout
    • Machine Codes and Peripherals Configuration
      • Main Machine
      • Options
    • Diagram
    • Specifications
  • Installation
    • Installation Requirements
      • Environment
      • Machine Level
      • Machine Space Requirements
      • Machine Dimensions
      • Power Requirements
        • Input voltage level
    • Who Installs the Peripherals and Options
    • Main Machine Installation
      • Installation Flow Chart
      • Accessory Check
      • Installation Procedure
        • Removal of Packing Materials and Shipping Retainers
        • Pulling out the Feeler of the Paper Exit Full Sensor
        • Checking the Position of the Paper Exit Feeler
        • Attaching the I/F Connection Cover
        • Attaching the Decals
        • Toner Bottle Installation and Toner Initialization
      • Image Quality Test / Settings
        • Before Test
        • Loading Paper
        • Paper Settings
        • Color Registration and Color Calibration
        • Checking the Print Image with the Test Print
        • HDD Security Function Settings
        • Settings Relevant to the Service Contract
      • Auto Remote Firmware Update (ARFU) Settings
        • Specifying the Time and Day of the Week to Prohibit Updating via Web Image Monitor
      • Moving the Machine
    • Security Settings
      • Configuring Administrator Authentication
      • Security Function Installation
      • Data Overwrite Security
        • Before You Begin the Procedure
        • Installation Procedure
        • Using Auto Erase Memory
      • HDD Encryption
        • Before You Begin the Procedure:
        • Installation Procedure:
        • Enable Encryption Setting
        • Check the Encryption Settings
        • Backing Up the Encryption Key
        • Encryption Key Restoration
    • Anti-Condensation Heater (PCDU)
      • Accessory Check
      • Installation procedure
    • Anti-Condensation Heater for Paper Feed Trays
      • Accessory Check
      • Connecting to Main Machine Tray
      • Connecting to Paper Feed Unit PB3240
      • Connecting to Paper Feed Unit PB3250
      • Connecting to LCIT PB3260
      • Connecting the Heaters when Using a Stack of Five Paper Trays
        • Overview
        • Installation Procedure
    • Paper Feed Unit Combinations
      • Connection Diagram
      • Connection Patterns
    • Paper Feed Unit PB3240 (M494-17, -21)
      • Accessory Check
      • Installation procedure
    • Installing a Stack of Five Paper Trays
      • Overview
      • Installation Procedure
    • Paper Feed Unit PB3250 (M495-17, -21)
      • Accessory Check
      • Installation Procedure
    • LCIT PB3260 (M496-17, -27, -21)
      • Accessory Check
      • Installation procedure
        • Changing the paper size
    • LCIT RT3030 (D696-17, -27, -21)
      • Accessory Check
      • Installation procedure
        • Changing the Paper Size
    • Banner Paper Guide Tray Type M19 (D3BF-00)
      • Component Check
      • Installation Procedure
    • Bridge Unit BU3070 (D685-18, -22)
      • Accessory Check
      • Installation procedure
    • Internal Multi-fold Unit FD3000 (M482-17, -21)
      • Accessory Check
      • Installation Procedure
      • When Attaching a Finisher Downstream from the Internal Multi-Fold Unit
    • Finisher SR3230 (D3BA-17, -21)
      • Accessory Check
      • Installation Procedure
      • Attaching a Support Tray
    • Output Jogger Unit Type M25 (D3CJ-01)
      • Accessory Check
      • Installation Procedure
    • Punch Unit PU3060 (D706-00, -01, 02, -03)
      • Accessory Check
      • Installation Procedure
    • Booklet Finisher SR3220 (D3B9-17, -21)
      • Accessory Check
      • Installation Procedure
      • Attaching a Proof Support Tray
    • Finisher SR3210 (D3B8-17, -21)
      • Accessory Check
      • Installation Procedure
      • Attaching a Proof Support Tray
      • Stapleless Stapler Initial Settings
        • How to change the setting of Staple Method for Stapleless Stapler
        • How to set Margin Erase for Stapleless Stapler
    • Punch Unit PU3050
      • Accessory Check
      • Installation Procedure
    • Mail Box CS3010 (M481-17)
      • Accessory Check
      • Installation Procedure
        • Removal of the Machine Exterior
        • Transferring the Operation Panel
        • Installation of the Mailbox
        • Installation of Stabilizers
    • Attention Light AL3000 (M500-36)
      • Component Check
      • Installation Procedure
      • Indicator Behavior
    • Imageable Area Extension Unit Type P11 (M500-49)
      • Component Check
      • Installation Procedure
        • When You Forgot to Change the SP
    • NFC Card Reader Type P11 (M512-18)
      • Accessory Check
      • Installation Procedure
    • External NFC Card Reader Bracket Type P11 (M512-17)
      • Accessory Check
      • Installation Procedure
        • Procedure for Connecting to the Operation Panel USB Slot
        • Procedure for Connecting to the Main Machine USB Slot
    • Internal Options
    • HDD Option Type P11 (M500-51)
      • Component Check
      • Installation Procedure
    • USB Device Server Option Type M19 (D3BC-28,-29)
      • Component Check
        • Interface Board Surface
      • Installation Procedure
        • What Do the LED Indications Mean?
      • IP Address Setting
    • Extended USB Board Type M19 (D3BS-01)
      • Component Check
      • Installation Procedure
    • IEEE 1284 Interface Board Type M19 (D3C0-17)
      • Accessory Check
      • Installation Procedure
    • IEEE 802.11a/g/n Interface Unit Type M19 (D3BR-01)
      • Accessory Check
      • Installation Procedure
        • Attaching the boards
        • Attaching the Antenna
      • User Tool Settings for IEEE 802.11a/g/n
      • SP Mode Settings for IEEE 802.11 Wireless LAN
    • SD Card Options
      • SD Card Slots
      • List of Slots Used
    • SD Card Appli Move
      • Overview
      • Move Exec
      • Undo Exec
    • VM Card Type P8 (M500-09, 10, 11)
      • Accessory Check
      • Installation Procedure
    • IPDS Unit Type P11 (M500-45, -46, -47)
      • Accessory Check
      • Installation Procedure
    • XPS Direct Print Option Type P11 (M500-42, -43, -44)
      • Accessory Check
      • Installation Procedure
    • Camera Direct Print Card Type M19 (D3BD-13)
      • Accessory Check
      • Installation Procedure
    • PostScript3 Unit Type P11 (M500-63, -64, -65)
      • Accessory Check
      • Overview of PostScript3 Unit Type P11 (Adobe PS)
      • Installation procedure (Adobe PS)
        • Initial Settings for the Printer Driver
        • Switching back to Clone PS from Adobe PS
    • @Remote Settings
  • Preventive Maintenance
    • PM Parts Settings
      • Replacement Procedure of the PM Parts
        • Method 1: By SP3701
        • Method 2: By [PM Counter / New Unit Set] Menu
      • After Installing the New PM Parts
        • SP descriptions
      • Preparation Before Operation Check
        • SP Descriptions
      • Operation Check
    • PM Parts List
  • Replacement and Adjustment
    • Notes on the Main Power Switch
      • Push Switch
        • Characteristics of the Push Switch (DC Switch)
        • Shutdown Method
        • Forced Shutdown
    • Beforehand
    • Special Tools
    • Exterior Covers
      • Overview
        • Front and Rear Side Covers
        • Left and Right Side Covers
        • Paper Exit Covers/Top Covers
        • Inner Covers
      • Quick Reference for Removing Covers
      • Front Cover
      • Front Upper Cover
      • Main Power Switch Cover
      • Waste Toner Cover
      • Controller Cover
      • Left Upper Cover
      • Left Rear Cover
      • Left Cover
      • Rear Left Cover
      • Rear Cover
      • Rear Lower Cover
      • Right Rear Cover
      • Right Upper Cover
      • Paper Exit Tray
      • Paper Exit Cover
      • Paper Exit Lower Cover
      • Paper Exit Front Cover
      • Top Right Cover
      • Top Rear Cover
      • Inner Upper Cover
      • Inner Lower Cover
    • Smart Operation Panel
      • Operation Panel Unit
      • Internal Parts
      • USB Cable
    • Laser Unit
      • Laser Unit
        • Before Replacement
        • Removing
        • Installing a New Laser Unit
        • What to Do after Replacing the Laser Unit
      • Polygon Mirror Motor
        • What to Do after Replacing the Polygon Mirror Motor
      • SP descriptions
    • PCDU
      • Notes when replacing a PCDU
        • For SP C840DN
        • For SP C842DN
        • Attaching the Spring after Mistakenly Releasing the Spring Pressure
      • PCDU
        • Replacement
        • What to Do after Replacing the PCDU
      • Imaging Temperature Sensor (Thermistor)
    • Waste Toner
      • Waste Toner Bottle
        • Before Replacing the Waste Toner Bottle
        • Replacement Procedure
    • Image Transfer Unit
      • Image Transfer Belt Unit
        • What to Do before Replacing the Image Transfer Belt
        • Replacement
      • Image Transfer Front Cover, Image Transfer Top Cover
      • Image Transfer Cleaning Unit
        • What to Do before Replacing the Image Transfer Cleaning Unit
        • Replacement
      • Image Transfer Belt
        • Attaching the Belt
        • What to do After Replacing the Image Transfer Belt
      • Paper Transfer Roller
        • When reinstalling the paper transfer roller
      • Paper Transfer Roller Unit
        • What to Do before Replacing the Paper Transfer Roller Unit
        • Replacement
      • Fusing Entrance Sensor
      • TM/ID Sensor
        • Before Replacing the TM/ID sensor
        • Replacement procedure
        • Adjustment after replacing the TM/ID sensor
      • Temperature and Humidity Sensor
      • ITB Contact and Release Sensor
      • Image Transfer Lock Unit
        • Installing the Image Transfer Lock Unit
    • Drive Unit
      • Overview
      • Paper Feed Motor
      • Transport Motor
      • Paper Transfer Contact and Release Motor Unit
      • Imaging Drive Unit
      • PCU Motor: CMY
      • Development Motor: CMY
      • Development Motor: Black
      • PCU: Black / ITB Drive Motor
      • Registration Motor
      • Fusing Motor
      • Paper Exit / Pressure Release Motor
      • Duplex Entrance Motor
      • Toner Supply Motor
      • Sub Hopper
        • K
        • C
        • M
        • Y
      • Toner End Sensor
      • Toner Duct
      • Toner Bottle Drive Motor
        • K
        • C
        • M
        • Y
      • ID Chip Contact Board
        • K
        • C
        • M
        • Y
      • Transport Coil
        • Y
        • M
        • C
        • K
    • Fusing Unit
      • Fusing Unit
      • Fusing Entrance Guide Plate
        • Cleaning the Fusing Entrance Guide Plate
      • Fusing Exit Guide Plate
        • Cleaning the Fusing Exit Guide Plate
      • Fusing Upper Cover
      • Fusing Lower Cover
      • Fusing Sleeve Belt Unit
        • What to Do before Replacing the Fusing Sleeve Belt Unit
        • Replacement
      • Pressure Roller
        • What to Do before replacing the pressure roller
        • Replacement
      • Fusing Sleeve Thermostat Unit
      • Non-Contact Thermistor
      • Pressure Roller Thermistor
      • Thermopile Unit
      • Pressure Roller HP Sensor
      • Fusing Shield Position Sensor
      • Fusing Shield Drive Motor
      • Fusing Exit Drive Solenoid
    • Paper Exit
      • Paper Exit Unit
        • Re-installing the Paper Exit Unit
      • Paper Exit Switching Solenoid
      • Paper Exit Sensor
      • Reverse Sensor
      • Paper Exit Full Sensor
      • Reverse Motor
      • Fusing Exit Sensor
      • Inverter Guide
      • Inverter Guide Cover Sensor
    • Paper Feed
      • Paper Feed Unit
        • 1st Paper Feed Unit
        • 2nd Paper Feed Unit
      • Paper Dust Collection Unit
      • Pick-up Roller, Paper Feed Roller, Separation Roller, Torque Limiter
      • 1st Tray Lift Motor, 2nd Tray Lift Motor
      • Paper Feed Sensor
      • Transport Sensor
      • Upper Limit Sensor
      • Paper End Sensor
      • Registration Sensor
    • Bypass Tray Unit
      • Bypass Tray
      • Bypass Paper End Sensor
      • Bypass Pick-up Roller
      • Bypass Paper Feed Roller
      • Bypass Separation Roller/Torque Limiter
      • Bypass Width Sensor
      • Bypass Length Sensor
    • Duplex Unit
      • Duplex Unit
      • Duplex/Bypass Motor
      • Duplex Entrance Sensor
      • Duplex Exit Sensor
    • Electrical Components
      • Overview
        • Printed Circuits/Parts inside the Controller Box
        • Printed Circuits behind the Controller Box
        • Printed Circuit/Parts inside the Power Box
        • Printed Circuits behind the Power Box
      • Controller Box Cover
      • Controller Bracket
      • Opening the Controller Box
      • IPU
      • BCU
        • When installing the new BCU
        • Replacing the NVRAM (EEPROM) on the BCU
      • Controller Board
        • Replacing the NVRAMs on the Controller Board
      • HDD
        • What to do After Replacing the HDD
      • Imaging IOB
      • HVP
      • PSU (AC Controller Board)
      • PSU (DC Power)
      • Paper Transport IOB
      • HVP-CB
        • HVP-CB with Bracket
    • Fans/Filters
      • Ozone filter/Dust filter
        • What to do Before Replacing the Dust Filter
        • Replacement
      • Deodorization Filter
      • Development Intake Fan
      • Ozone Exhaust Fan
      • Paper Exit Cooling Fan
      • Fusing Exhaust Fan
      • Drive Cooling Fan
      • Toner Supply Cooling Fan
      • Main Exhaust Fan
      • PSU Cooling Fan
      • Controller Box Cooling Fan
    • Test Pattern Printing
    • Image Adjustment
      • Color Calibration
      • Registration
      • Erase Margin Adjustment
      • Adjusting the Tone of the Printed Image
      • Adjustment by Changing the Printer Driver Setting
        • Opening the Printer Driver's "Color Balance Details" Window
        • Color Balance Details Window
        • Adjusting the Tone in the "Color Balance Details" Window
        • Adjustment Examples
      • Adjustment by Changing the Machine's Profile Setting
        • Procedure to Change the Profile Setting
        • Patterns and Tendency of the Tone for Each Profile
      • Printer Gamma Correction
      • Color Registration
        • Check the occurrence of color registration errors
        • Judgment for type of color registration error
  • System Maintenance
    • Service Program Mode
      • Entering SP Mode
      • Exiting SP Mode
      • Types of SP Modes
        • SP Mode Button Summary
        • Selecting the Program Number
        • Service Mode Lock/Unlock
      • Remarks
        • Others
    • SP Tables
    • Firmware Update (SD Card)
      • Overview
      • Firmware Type
      • Procedure
        • Preparing the SD Card
        • Update Procedure
      • Error Screens During Updating
    • Firmware Update (Remote Firmware Update)
      • RFU Performable Condition
    • Firmware Update (Smart Firmware Update)
      • Overview
      • Immediate Update
      • Update at the Next Visit (Reserve)
        • How to Set the Machine to Download Firmware Later (Reserve)
        • How to Check if the Firmware Downloaded with Reserve
        • How to Install Firmware Downloaded with Reserve
      • Update via SD Card
    • Firmware Update (Auto Remote Firmware Update)
      • Overview
      • Downloading and Updating Process
        • Downloads the Latest Package
        • Judgement of ARFU
        • Update Process
      • Checking the ARFU Result
      • Checking the Result Using the Logging Data
      • Related SP
    • Updating JavaVM
      • Overview
      • Deactivating SDK Applications and Removing the VM Card
        • Operation from Operation Panel
        • Operation from Web Image Monitor
      • Updating JavaVM and Inserting the VM Card
      • Activating SDK Applications
    • NVRAM Data Upload/Download
      • Uploading Content of NVRAM to an SD card
      • Downloading an SD Card to NVRAM
    • Address Book Upload/Download
      • Information List
      • Download
      • Upload
    • Capturing the Device Logs
      • Overview
        • Security of the Operation Log
      • Storing the Device Logs on an SD card (SP C840DN without option HDD only)
      • Retrieving the Device Logs via Operation Panel
        • Procedure for Retrieving the Device Log with SD Card
      • Retrieving the Device Logs via Web Image Monitor
    • SMC List Card Save Function
      • Overview
      • Procedure
      • Notes on Using the SMC List Card Save Function
      • File Names of the Saved SMC Lists
      • Error Messages
    • UP/SP Data Import/Export
      • Outline
      • UP Data Import/Export
        • Data that Can Be Imported and Exported
        • Data that Cannot Be Imported or Exported
        • Exporting Device Information
        • Importing Device Information
      • SP Data Import/Export
        • Data that can be imported and exported
        • Exporting Device Information
        • Importing Device Information
      • Possible solutions for import/export problems
    • Card Save Function
      • Overview
        • Card Save
      • Procedure
      • Error Messages
  • Troubleshooting
    • Self-Diagnostic Mode
      • SC Automatic Reboot
      • Controller Self-diagnosis Outline
      • Controller Self-diagnosis Flowchart
      • HDD-related Message
    • Service Call Conditions
      • Summary
        • SC Logging
      • List of Automatic Reboot Target SC
        • Engine SC
        • Controller SC
      • SC Code Classification
    • Service Call 195
      • SC100 (Engine: Serial Number)
    • Service Call 202-285
      • SC200 (Engine: Image Writing)
    • Service Call 312-396
      • SC300 (Engine: Charge, Development)
    • Service Call 441-498
      • SC400 (Engine: Around the Drum)
    • Service Call 501-584
      • SC500 (Engine: Paper transport 1: Paper Feed, Duplex, Transport)
      • SC500 (Engine: Fusing)
        • Fusing Sleeve (Center) Error (SC54*-**)
        • Fusing Sleeve (Edge) Error (SC55*-**)
        • Pressure Roller Thermistor (Center) Error (SC56*-**)
        • Pressure Roller Thermistor (Edge) Error (SC57*-**)
        • Pressure Roller Thermistor (Full-Bleed Edge) Error (SC58*-**)
    • Service Call 620-689
      • SC600 (Engine: Communication and Others)
      • SC600 (Controller)
    • Service Call 700-792
      • SC700 (Engine: Peripherals)
    • Service Call 816-899
      • SC800 (Controller)
    • Service Call 900-998
      • SC900 (Engine: Others)
      • SC900 (Controller)
    • Troubleshooting for SC Errors
      • When SC285-02 (MUSIC Error) is Displayed
        • Cause
        • Solution
      • When SC370 (TM (ID) Sensor Calibration Error) is Displayed
        • Cause
        • Solution
        • Recovery Check Procedure
        • Adjustment after Recovery
      • When SC501, SC502, SC503, or SC504 (Paper Tray Error) is Displayed
        • Solution
      • When SC544-02, SC554-02 (Non-contact Thermistor High Temperature Detection) Is Displayed
        • How to Clear SC544-02/SC554-02 with a New Unit Detection Fuse
      • When SC549 (Shield Operation Error Detection) is Displayed
        • Troubleshooting Flowchart
        • Fusing Shield Check
      • Isolation Diagram of SC663, 664, 665, 667, 668, and 670-01
      • When SC670 (Engine start up error) is Displayed
        • Cause
        • Solution
      • When SC672 (Controller start up error) is Displayed
        • Symptom
        • Cause
        • Solution
        • [A]: LEDs on the controller board
        • [B]: Abnormal mode: LEDs on the controller board
        • [C]: Reconnecting and replacing the USB cable
        • [D]: Replacing the Memory
        • [E]: CMOS clear
        • [F]: Fuse on the IPU
        • [G]: Replacing the USB cable and the operation panel
    • Jam Detection
      • Jam Display
      • Clearing a Paper Jam
      • Paper Jam History
        • How to Check a Paper Jam
        • Paper Jam Display
      • Jam Codes and Display Codes
      • Paper Size Code
      • Sensor Locations
    • Troubleshooting for Transport/Paper Feeding of the Machine
      • Curled Paper
      • Initial Jam
        • Initial Jam: Cause Code 001 / Location Code A
        • Initial Jam: Cause Code 001 / Location Code B
        • Initial Jam: Cause Code 001 / Location Code C
        • Initial Jam: Cause Code 001 / Location Code Z
      • Jam
        • Tray 1 No Feeding: Late Jam: Cause Code 003
        • Tray 2 No Feeding: Late Jam: Cause Code 004
        • Bypass No Feeding: Cause Code 008
        • Tray 1 Transport Sensor: Late Jam: Cause Code 011
        • Tray 2 Transport Sensor: Late Jam: Cause Code 012
        • Registration Sensor: Late Jam: Cause Code 017
        • Fusing Entrance Sensor: Late Jam: Cause Code 018
        • Fusing Exit Sensor: Late Jam: Cause Code 019
        • Paper Exit Sensor: Late Jam: Cause Code 020
        • Tray 1 Transport Sensor: Lag Jam: Cause Code 051
        • Tray 2 Transport Sensor: Lag Jam: Cause Code 052
        • Registration Sensor: Lag Jam: Cause Code 057
        • Paper Exit Sensor: Lag Jam: Cause Code 060
        • Reverse Sensor: Late Jam: Cause Code 024
        • Reverse Sensor: Lag Jam : Cause Code 064
        • Duplex Exit Sensor: Late Jam: Cause Code 025
        • Duplex Exit Sensor: Lag Jam: Cause Code 065
        • Duplex Entrance Sensor: Late Jam: Cause Code 027
        • Duplex Entrance Sensor: Lag Jam: Cause Code 067
        • Duplex Not Feeding: Cause Code 009
        • Bypass Transport Sensor 1: Lag Jam: Cause Code 048
      • Display Error
        • "No paper in Tray 1" is displayed even when there is paper
        • "No paper in Tray 2" is displayed even when there is paper
        • "Tray 1 not set" is displayed even when the tray is set
        • "Tray 2 not set" is displayed even when the tray is set
        • Wrong paper size displayed on the operation panel
        • Does not shift to right door open status
        • Cannot detect paper exit full
        • Cannot print as paper exit full alert cannot be turned off
      • Others
        • "Replace the waste toner bottle" is displayed even when it is clear that the waste toner bottle is not full
        • Waste toner bottle is never full
        • No waste toner bottle set is displayed on controller board even when it is clear that is set
        • Waste toner bottle is not detected even when it is set
        • Paper Transfer Unit Open/Closed LED not lit & Paper Transfer Unit Open
        • Paper Transfer Unit Open/Closed LED not lit
        • Paper Transfer Unit Open/Closed LED always lit
    • Troubleshooting for Finishing Options
      • Finisher Registration Adjustment
        • For Finisher SR3230
        • For Booklet Finisher SR3220 or Finisher SR3210
      • Finisher Jogger Problem for Booklet Finisher SR3220 or Finisher SR3210
      • Maximum number of sheets for stapling and what happens when the job has too many pages
        • Specifications: Maximum Sheet Capability for Staple Jobs
        • Behavior: When the number of sheets exceeds the maximum staple capability
        • Select the behavior when the job has more than the maximum of staple capability with SP5199
    • Electrical Component Defects
      • Fuses
    • Image Quality Problems
      • When an Abnormal Image is Generated
    • Other Troubleshooting
      • When Abnormal Noise Occurs
        • Checking Abnormal Noise from the Fusing Unit
        • Operation Check Procedure for the Toner Supply Motor and Toner Bottle Drive Motor
      • When Fluorescent/LED Lamps Flicker
  • Detailed Descriptions
    • Guidance for Those Who are Familiar with Predecessor Products
    • Component Layout
      • Laser Exposure Unit
      • Image Transfer Unit
      • PCDU
      • Toner Supply, Waste Toner Bottle
      • Paper Feed Unit
      • Duplex Unit
      • Bypass Unit
      • Fusing Unit
      • Paper Transfer, Paper Exit
      • Air Flow
      • Drive Unit
      • Boards, Switches
    • Laser Exposure
      • Overview
        • Parts Construction
      • Mechanism
        • LD Drive Board
        • LD Safety Switch
        • Circuit Diagram
        • Line Scanning Mechanism
    • Process Control
      • Mechanism
        • Sensor Construction
        • Outline of the ID Sensors
        • Outline of the TD sensor
      • Process Control
        • Outline
        • Result Code for Executing Process Control
        • Process Control Procedure
        • Electrified Potential / Development Bias, Vref Correction
        • LD Power Control
        • Toner Supply Control
        • Developer Initialization
      • MUSIC (Automatic Color Registration Correction)
        • Correction Timing
        • Executing MUSIC Manually
        • Contact MUSIC (SP2-111-004)
        • MUSIC Error Judgment
      • Real Time Process Control
      • IBACC
        • Outline
        • Operation Timing
        • Patch Pattern
      • SP Descriptions
    • PCDU (Photo Conductor and Development Unit)
      • Overview
      • Mechanism (PCU)
        • Drum Drive
        • Charge
        • Drum Cleaning
      • Mechanism (Development)
        • Development System
        • Agitation System
        • TD (Mu) Sensor
        • Pressure Release Filter
        • Development Drive
        • Development Bias
    • Toner Supply
      • Overview
      • Mechanism
        • Toner supply (Toner Bottle - Sub-hopper)
        • Toner bottle ID chip
        • Toner supply (Sub-hopper - Development Unit)
        • Drive
        • Toner Near End/End Detection
        • SP Descriptions
    • Waste Toner
      • Overview
      • Mechanism
        • Waste Toner Bottle Set Detection
        • Waste Toner Drive
        • Waste Toner Recovery Path (PCU/Image Transfer Unit)
        • Waste Toner Bottle Full Detection
    • Image Transfer and Paper Transfer
      • Overview
        • Image Transfer Unit
        • Paper Transfer Unit
      • Image Transfer Unit Mechanism
        • Drive Mechanism
        • Transfer Bias
        • ITB Contact and Release
        • Image Transfer Belt Drive Control
        • Image Transfer Sequence
        • Unit Configuration: Changes from Met-C2
      • Image Transfer Belt Cleaning Mechanism
      • Paper Transfer Unit Mechanism
        • Paper Transfer Mechanism
        • PTR (Paper Transfer Roller) Drive
        • PTR (Paper Transfer Roller) Contact and Separation
        • Separation
        • TM/ID Sensor
    • Paper Feed / Transport
      • Overview
      • Feed /Transport Mechanisms
        • Tray Base Plate Lift
        • Paper Feed Mechanism
        • Paper Feed Transport Mechanism
        • Paper Size Detection (1st Paper Feed Tray)
        • Paper Size Detection (2nd Paper Feed Tray)
        • Remaining Paper Detection
        • Paper End Detection
        • Paper Feed Drive
        • Paper Dust Removal Mechanism
        • Tray Draw-in Mechanism
      • Bypass Feed Section
        • Bypass Feed Paper/Separation Mechanism
        • Bypass Feed Paper Size Detection
        • Bypass Feed Paper End Detection
        • Bypass Paper Feeder Drive
      • Duplex Section
        • Transport Inversion Mechanism
        • Duplex Drive
        • Interleave Mechanism
      • Paper Exit Unit
        • Delivery Location Change-over
        • Paper Exit Full Detection/Paper Exit Jam Detection
      • Drive/Sensor Layout
        • Transport Roller Drive Source
        • Gate/Pickup Arm Drive Source
        • Transport Paths Between Rollers
        • Sensor Position
        • Paper Exit Driven Roller and Paper Support Guide
        • Removing Wrinkling in the Tray
    • Fusing
      • Overview
      • Parts Layout
      • Mechanism
        • Fusing System
        • Temperature Control
        • Fusing Drive
        • Pressure Release Mechanism
        • Fusing Temperature Control
        • PPM Down Control
        • Curl Correction Mechanism
        • Fusing Unit Lock System
        • lncompatibility
    • Electrical parts
      • Block Diagram
      • Board Outline
        • Controller
        • LDB
        • BCU
        • IPU
        • IOB
        • OPU
        • HVP (composite high-voltage power supply TTS/CB)
        • PSU
      • Feed Tray Anti-condensation Heater and PCDU Anti-condensation Heater
        • Circuit Configuration
    • Exterior Cover/Air Flows (Fan Control)
      • Air Flows
      • Mechanism
        • Cooling of Toner Supply Parts
        • Cooling of PCDU Parts
        • Cooling of Fusing Parts
        • Cooling of Actuator
        • Cooling in Controller Box
        • Machine Control when Temperature Rises inside the Machine
        • Helmholtz Silencer
    • Energy Save
      • Energy Saver Modes
        • Setting Items that are Related to Energy Saving
        • Recovery Time/Reduced Electrical Consumption
      • Power States of this Machine
      • Verification of Up Time for each Energy Saving State
      • Checking the Up time by Device State
      • Recommendation
    • 10 Second Recovery from Sleep Mode
      • Improving the Print Start Time under Low Temperature, Low Humidity, or at Low Voltage
      • Improving the Throughput at the Start of Printing, under Low Temperature, or at Low Voltage
    • Adobe PS vs. Clone PS
      • Overview
      • How to Distinguish Adobe PS from Clone PS
      • Difference in Device Fonts
        • Font Change Confirmation Screen
        • List of fonts and their replacements (Adobe PS -> Clone PS)
      • Differences in Driver Functions