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Detailed Descriptions

Overview

General Layout

Component Layout

Bypass Unit

Optics

Paper Feed Unit (PFU)

Electrical Components

Tandem Tray

Around the Drum

Sensors, Switches

Motors, Fans

Transfer, Fusing, Exit Units

Duplex Unit

ADF Unit

Paper Path

Motors

Scanner

Overview

Block Diagram

Cross Section

Configuration

Mechanism

Scanner

Scanner drive

Original Size Detection

Sensor States

Original Feed from ADF

Dust Detection

Overview

Shifting the Scanning Position

Scanner Anti-Condensation Heater

Image Processing

Image Data Flow

Image Processing

Image Processing Flow

Manual Gamma Adjustment

SP Codes Related to Gamma Adjustments

Print Process (Main Engine Components)

Laser Unit

Block Diagram of Laser Unit

Laser Unit Components

Laser Unit

APC (Auto Power Control)

LD Safety Switch (Front Door Interlock Switch)

Laser Unit Control

Line scan mechanism

Multi-beam Scanning

Drum Unit

Cross Section of Drum Unit

OPC Drum

Charge

Charge Wire Cleaning

PTL (Pre-Transfer Lamp)

Paper separation pawls

Drum Cleaning mechanism

Drum Cleaning Drive

Ozone Filters and Drum Cooling

Toner recycling mechanism

Reusable and Unreusable Toner Separation Mechanism

Used Toner Bottle

Process Control

Automatic Setting Operation

Automatic Process Control

Development Unit

Development Unit Cross Section

Toner Supply Unit

Development Mechanism

Inside the Development Unit

Development Bias

Development Unit Pressure Release (D225 only)

Toner Supply

Development Unit Drive and Cooling

Toner Transport

Toner End Detection

Shutter Mechanism

Toner Bottle Supply, Toner Bottle Cooling

Toner Supply Control

Sensor Control Mode

Pixel Count Mode

TD Sensor Reference Voltage

Abnormal TD Sensor Output

ID Sensor Control

Both TD Sensor and ID Sensor Abnormal

Toner Near-End Control

Toner End Recovery

Transfer Belt Unit

Overview

Transfer Separation Mechanism

Image Transfer Mechanism

Transfer Bias Charge Mechanism

Transfer Belt Lift

Transfer Belt Drive and Paper Transport Mechanism

Transfer Belt Cleaning Mechanism

Transfer Belt Release Mechanism

Anti-Condensation Heater (Option)

Image Transfer Current Settings

Fusing Unit

Overview

More About the Fusing Unit

Fusing Pressure Mechanism

Pressure Application (D223/D224 Only)

Fusing Safety Devices

Entrance Guide Height Adjustment

Fusing Drive Mechanism

Temperature Control for Special Paper

Fusing Temperature Control

CPM Down Mode

Important Related SP Codes

Temperature Sensor Fan Control

Fans Controlled by Temperature Sensor

Fan Speed Control by Temperature Sensor

Relate SP Codes

Paper Transport

Paper Feed Units (PFU)

Overview

Tray Paper Feed Drive

Paper Feed From Tray 1

Paper Feed From Tray 2

Paper Feed From Tray 3

PFU and Tray Details

Paper Feed and Separation

Separation Roller Release

Tray Raising and Lowering

Tray Upper Limit Detection

Paper End Detection

Paper Size Detection

Tray Set Mechanism

Vertical Paper Feed

Tray 1 (Tandem Tray)

Paper Size Detection

Tray Movement Mechanism

Paper Height Detection

Right Tray Fence Movement Mechanism

Left Tray Movement

Left Tray Lock Mechanism

Right Tray Lock Mechanism

Bypass Tray

Bypass Feed Tray Mechanism

Bypass Tray Feed and Separation Mechanism

Paper Stopper Mechanism

Bypass Tray Paper End Detection Mechanism

Paper Size Detection

Paper Registration and Transport in Bypass Unit

Invert, Duplex Unit

Overview

Motors

Invert Duplex Entrance

Jogging Operation

Invert Operation

Duplex Transport Mechanism

Paper Jam Release and Reset Mechanism

Exit Unit

Overview

Decurl Mechanism

Exit Junction Gate Mechanism

Duplex Interleave Feed Sequence

Electronic Components

Boards

Board Layout

Board Functions

ADF Unit

Overview

Specifications

Original Size

Cross-Section of ADF Unit

Scanning Sequence

ADF Components

Motors

Original Pick-up

Bottom Plate Lift

Original Feed and Separation Mechanism

Skew Correction Mechanism

Original Size Detection

Original Transport

Original Scanning

Jam Detection Sensors

ADF SC Errors

New Features

Human Detection (Proximity) Sensor

Overview

Sensor Operation

Operation Modes

User Tool

Related SC Codes

Related SP Code

Operation Panel

Shutdown Feature

Specification

The Shutdown Screen

Automatic Delete Memory Function (HDD Security)

Specification

Data Encryption

Overview

Handling Data Encryption

Data Targeted for Encryption

Precautions About Encryption

Preferences Function (SMC Data Media Storage)

Function Details