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Toshiba 8070 User Manual

Toshiba 8070
379 pages
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1-1, KANDA NISHIKI-CHO, CHIYODA-KU, TOKYO, 101-8442, JAPAN
SERVICE MANUAL
DIGITAL PLAIN PAPER COPIER
8070/6570
5570/4580
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Toshiba 8070 Specifications

General IconGeneral
BrandToshiba
Model8070
CategoryCopier
LanguageEnglish

Summary

Specifications, Accessories, Options, and Supplies

Specifications

Detailed technical specifications of the copier, including copy speed and paper handling.

Accessories

Lists optional accessories provided with the copier, such as unpacking instructions and manuals.

Options

Lists optional hardware components for enhancing copier functionality, like finishers.

Supplies

Lists consumable parts required for the copier's operation, such as toner and developer.

System List

Provides diagrams illustrating the system configuration and interconnected components.

Outline of the Machine

Sectional View

Detailed sectional views showing the internal structure and location of various machine parts.

Electrical parts layout

Diagrams illustrating the layout of electrical components within different units of the copier.

Symbols and Functions of Components

Lists symbols and their corresponding functions for motors, solenoids, sensors, and other components.

Copying Process

Copying Process

Explains the step-by-step process of image formation and copying within the machine.

Details of Copying Process

Provides detailed explanations of each stage of the copying process, including drum and charging.

Comparison of Copying Process Conditions

Compares the copying process conditions and specifications between different copier models.

Copier Operation

Operation Outline

Provides a general overview of copier operation modes, including warm-up and copying.

Description of Operation

Details the operational steps for warming up, standby, automatic feed, bypass, and interrupt copying.

Fault Detection

Explains how faults are detected, classified, and provides explanations for common faults.

Flow Charts

Presents flowcharts illustrating the operational logic for power-on readiness and automatic feed copying.

Display Unit

Detailed Drawing of the Control Panel and the Display Panel

Illustrates the control panel layout and the LCD display for operation status and messages.

Items Shown on the Display Panel

Lists and explains messages displayed during normal operation and fault conditions.

Relation between Copier Conditions and Operator’s Actions

Shows the relationship between copier conditions and operator actions for various operations.

Description of Operation

Describes the circuitry and operation of the dot matrix LCD and LED display systems.

Disassembly and Replacement

Provides step-by-step instructions for disassembling and replacing control panel components.

Image Processing

Introduction

Introduces the image processing stages from scanner to printer, highlighting ASIC functions.

Image Processing Circuit

Details the image processing circuit configuration, including SLG and PLG boards.

SLG Board (PWA-F-SLG-300)

Explains the features and functions of the SLG board, including image processing capabilities.

PLG Board (PWA-F-PLG-300)

Details the functions of the PLG board, covering smoothing, interface, and laser control.

Scanner

Describes the scanner's role in image processing, including light conversion and A/D conversion.

Printer

Explains the printer's role in laser writing and image area control based on processed signals.

Scanner

Functions

Describes the scanner's function in converting reflected light into electrical signals for image processing.

Configuration

Details the configuration of the optical system and the purpose of its components.

Description of Operation

Explains the operation of the scanning motor, document motor, and optical fan motor.

Drive of the 5-Phase Stepping Motor

Details the features and principle of the 5-phase stepping motor used in the scanner.

Exposure Control Circuit

Explains the exposure control circuit, including lamp regulator and sensor adjustments.

Outline of Control

Outlines the control processes, including photo-voltaic conversion and shading compensation.

Automatic Original-Size Detection Circuit

Describes the circuit for automatically detecting the size of the original document.

Disassembly and Replacement

Provides instructions for disassembling and replacing scanner unit components.

Printing

Function Outline

Outlines how the laser optical system irradiates the drum to produce a latent image.

Structure

Details the structure of the laser unit, including diodes, lenses, apertures, and safety precautions.

Laser Diode

Describes the semiconductor laser diode used, its characteristics, and control circuits.

Disassembly and Replacement

Provides instructions for disassembling and replacing parts of the laser light unit.

Paper Feed System

General

Provides a general overview of the paper feed system, its functions, and main sections.

Aligning Section

Details the aligning section, including rollers, switches, and drive mechanisms for paper alignment.

Large Capacity Feeder (LCF)

Explains the construction, operation, and components of the Large Capacity Feeder.

Paper Feed Pedestal (PFP)

Describes the PFP's components, including cassettes, elevator, and paper feed mechanisms.

Drum-Related Section

Construction

Describes the construction of the drum and related parts, including the main charger and discharge LED.

Functions

Explains the functions of the drum, main charger, charger wire cleaner, and discharge LED.

Disassembly and Replacement

Provides procedures for disassembling and replacing the drum, main charger, and charger wire.

Transfer/Transport Unit

Construction

Describes the construction of the belt transport unit, excluding the fuser unit.

Description of Operation

Explains the operation of the transfer belt, including its contact and separation with the drum.

Functions

Details the functions of the transfer belt unit components like cleaning blade, brush, and auger.

Display and Replacement

Provides instructions for displaying and replacing the belt transport and transfer belt units.

Developer Unit

General Description

Provides a general description of the developer unit and the developing process.

Construction

Details the construction of the developer unit, including sleeves, leveler, and mixing unit.

Developer Unit Drive

Illustrates the gear train and drive mechanisms for the developer unit.

Motors

Details the IC motor and developer motor drive circuits and their operation.

Auto-Toner Sensor Circuit

Explains the auto-toner sensor circuit for maintaining toner density and detecting toner-empty status.

Disassembly and Replacement

Provides instructions for disassembling and replacing the developer unit and its components.

Cleaner Unit

Construction

Describes the construction of the cleaner unit, including blades, brushes, and toner bag.

Description of Functions

Explains the functions of the cleaner unit components like main blade, recovery blade, and toner bag.

Drum Temperature Detection Circuit

Details the circuit for detecting drum temperature and its control signals.

Control for Maintaining Image Quality Using a Toner Adhesion Amount Sensor

Explains how the toner adhesion sensor controls image quality by adjusting formation conditions.

Disassembly and Replacement

Provides instructions for disassembling and replacing cleaner unit components.

Fuser Unit

General Description

Provides a general description of the fuser unit and its role in fusing toner to paper.

Description of Operation

Explains the fuser's operation, including heat, pressure, and separation of paper.

Functions

Details the functions of fuser unit components like heater lamps, rollers, and cleaning rollers.

Heater Control Circuit

Explains the heater control circuit, temperature detection, and abnormal heater condition management.

Heat-Roller Motor Drive

Details the heat-roller motor drive, including its operation and control signals.

Disassembly and Replacement

Provides instructions for disassembling and replacing fuser unit components like rollers and lamps.

Automatic Duplexing Unit (ADU)

Introduction

Introduces the ADU's function for automatic duplex copying and stacking up to 60 copies.

Drive

Details the drive mechanisms for various ADU sections, including gates, rollers, and clutches.

Description of Operation

Explains the paper stacking and duplex copy (re-feed) operations within the ADU.

Disassembly and Replacement

Provides instructions for disassembling and replacing ADU covers and units.

Automating Document Feeder (ADF)

Outline

Outlines the ADF's function in feeding originals and its main sections: feed, transport, and exit.

Construction

Details the ADF construction, listing mechanical and electrical components by section.

Description of Operations

Explains the ADF operation for setting originals, alignment, and various transport modes.

Description of Interface Signals

Describes the interface signals used for communication between the copier and the ADF.

Detection of Paper Jam

Details the detection methods for paper jams in the ADF's feed and transport sections.

Detection of Original Size

Explains the method used by the ADF to detect the size of the original document.

Flow Charts

Provides flowcharts illustrating the ADF's main routines and operational controls.

Timing Charts

Presents timing charts for various ADF operations, showing signal sequences.

Descriptions of Symbols, Layout of Electrical Parts and Signal Block Diagrams

Lists symbols for motors, solenoids, sensors, and shows electrical parts layout and signal blocks.

Description of Circuits

Describes various circuits within the ADF, including sensor inputs and motor drives.

Description of I/O signals

Details the input/output signals for communication between the copier and the ADF.

Disassembly and Replacement

Provides instructions for disassembling and replacing ADF unit components.

Power Supply Unit

Configuration

Describes the configuration of the power supply unit, including AC filter and DC output circuits.

Operation of DC Output Circuit

Explains the operation of DC output circuits, including start-up, stop, and protection features.

PC Board

PWA-F-SYS-300

Shows the layout of the PWA-F-SYS-300 PC board.

PWA-F-MTB-300

Shows the layout of the PWA-F-MTB-300 PC board.

PWA-F-LGC-300

Shows the layout of the PWA-F-LGC-300 PC board.

PWA-F-ADU-300

Shows the layout of the PWA-F-ADU-300 PC board.

PWA-F-MOT-300

Shows the layout of the PWA-F-MOT-300 PC board.

PWA-F-SLG-300

Shows the layout of the PWA-F-SLG-300 PC board.

PWA-F-SDV-300

Shows the layout of the PWA-F-SDV-300 PC board.

PWA-F-PLG-300

Shows the layout of the PWA-F-PLG-300 PC board.

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