Toshiba e-STUDIO453 User Manual

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e-STUDIO350/352/353/450/452/453
FUSER UNIT / PAPER EXIT SECTION
© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
Reference
*The thermistor/heater status counter never has values other than 0-18.
• If the IH coil does not turn ON and the service call [C410] is displayed immediately after the
power is ON, ensure the thermistor/heater status counter is “2” or over. If it is “2” or over, be
sure to check the thermistor, thermostat and IH coil. Reset the counter to “0” (Setting Mode
(08-400)) after repairing them, then turn ON the power.
• If the thermistor/heater status counter is “19” or over (e.g., 21), the data in NVRAM or
NVRAM itself may possibly have been ruined due to causes such as leakage from the char-
gers. Check the bias, high-voltage transformers and charge wires to see if any of them is
defective, and also look through all the data in the NVRAM.
• When the thermistors detect overheating, the CPU decides the error code and counter value
of the fuser roller thermistor status. After turning OFF each output (the IH coil, exposure
lamp, control panel display, motors and so on), the CPU turns OFF the power to protect the
fuser unit.
Error code: C440 ([C] and [8])
Counter value of the fuser roller thermistor status: 9 (08-400)
Thermistors continue detecting the abnormal temperature even after the error codes and
counter values are decided. Even if the power is turned ON immediately, it is automatically
turned OFF again when the surface temperature of the fuser roller is still higher than the
abnormal temperature detected.
Wait until the surface temperature of the fuser roller is lowered enough, and turn ON the
powertocheckthecountervaluewhileitisturnedOFFagain.Afterconrmingthatitisthe
IH control abnormality, correct the abnormality and clear the counter value (08-400) to "0" to
start up the equipment normally.
(5) Thermistor/Heater status counter control
• To enhance the safety of the fusing section unit, CPU provides the following protection: When
the third [C410] error has occurred after two consecutive [C410] errors, the IH coil is not turned
ON and error [C410] is displayed immediately even if an operator turns OFF the power and
back ON.
However, if the equipment goes into a ready state normally with the thermistor/heater status
counter “1” or below, the counter is cleared to “0”.
• If the error codes [C410] to [C450] are displayed and still not cleared even though the thermis-
tor, thermostat and IH coil have been repaired (and the power ON/OFF does not clear the er-

Toshiba e-STUDIO453 Specifications

General

Brand	Toshiba
Model	e-STUDIO453
Category	All in One Printer
Language	English

Summary

General Precautions for Installation and Service

1. Transportation / Installation

Guidelines for safely moving and setting up the equipment.

2. Service of Machines

Precautions and safety measures to take when servicing the machine.

Safety and Handling Precautions

3. Main Service Parts for Safety

Highlights critical components for safe operation and maintenance.

4. Cautionary Labels

Information regarding important safety labels on the equipment.

5. Disposition of Consumable Parts and Materials

Guidance on proper disposal of materials according to regulations.

8. Precautions Against Static Electricity

Procedures to prevent damage to electronic components from static discharge.

1. Specifications, Accessories, Options, and Supplies

1.1 Specifications

Details on the technical features and capabilities of the equipment.

1.2 Accessories

Lists the items included with the equipment.

1.3 Options

Lists optional components and add-ons for the equipment.

1.4 Supplies

Information on consumable items like toner and developer.

2. Outline of the Machine

2.1 Sectional View

Explains the internal structure of the machine with diagrams.

2.2 Electric Parts Layout

Illustrates the arrangement of electrical components within the machine.

2.3 Symbols and Functions of Various Components

Details the purpose and symbols of different parts within the machine.

2.5 Installation and Replacement of Covers and PC boards

Instructions for removing and installing external covers and circuit boards.

3. Copy Process

3.1 General Description of Copying Process

Outlines the step-by-step process of how copying is performed.

3.2 Details of Copying Process

Provides in-depth explanations of each stage in the copying process.

4. General Operation

4.1 Overview of Operation

General guide to operating the equipment.

4.2 Description of Operation

Detailed explanation of how to perform various operations.

4.3 Detection of Abnormality

Information on how the machine detects and reports errors.

5. Control Panel

5.1 Control Panel and Display Panel

Description of the control panel layout and its display elements.

5.2 Items Shown on the Display Panel

Explains the various information displayed on the equipment's screen.

5.4 Description of Operation

Detailed explanation of how the equipment operates.

6. Scanner

6.1 Function

Explains the purpose and basic operation of the scanner.

6.2 Construction

Details the physical components and structure of the scanner.

6.3 Description of Operation

Explains how the scanner functions during operation.

6.7 Disassembly and Replacement

Instructions for removing and installing scanner components.

7. Image Processing

7.1 General Description

Overview of the image processing stages.

7.3 SLG Board

Details the functions and features of the SLG board.

7.4 LGC Board

Details the functions and features of the LGC board.

7.5 Laser Driving PC Board (LDR board)

Explains the function of the LDR board in laser control.

8. Laser Optical Unit

8.1 General Description

Overview of the laser optical system.

8.2 Structure

Describes the physical construction of the laser optical unit.

8.3 Laser Diode

Details the laser diode, its specifications, and control.

8.5 Polygonal Motor

Explains the polygonal motor's drive circuit and control signals.

9. Paper Feeding System

9.1 Functions

Describes the purpose and main components of the paper feeding system.

9.2 Operation

Explains how the paper feeding system operates.

9.4 Disassembly and Replacement

Instructions for disassembling and replacing components in the paper feeding system.

10. Drive System

10.1 General Description

Overview of the machine's drive system and main motor.

10.3 Main Motor

Details the main motor's drive and control signals.

10.4 Disassembly and Replacement

Instructions for removing and replacing drive system components.

11. Drum Related Section

11.1 Configuration

Outlines the components around the drum and their arrangement.

11.2 Functions

Explains the roles of the drum and related components.

11.3 Output Control Circuits of High-Voltage Transformer

Details the circuits controlling high voltage outputs for chargers and bias.

11.6 Disassembly and Replacement

Instructions for removing and replacing drum-related parts.

12. Development System

12.1 Configuration

Describes the components of the development system.

12.2 Functions

Explains the functions of the toner cartridge and developer unit.

12.4 Auto-Toner Circuit

Explains the circuit that manages toner density and supply.

12.5 Disassembly and Replacement

Instructions for disassembling and replacing developer system components.

13. Fuser Unit / Paper Exit Section

13.1 General Description

Overview of the fuser unit and its role in fusing toner.

13.2 Operation

Explains how the fuser unit operates to fuse toner onto paper.

13.3 Functions

Details the functions of the IH coil, rollers, and thermistors.

13.4 Heater Control Circuit

Describes the circuit that controls the heating elements.

13.7 Disassembly and Replacement

Instructions for disassembling and replacing fuser unit components.

14. Automatic Duplexing Unit (ADU)

14.1 General Description

Overview of the ADU's function in duplex printing.

14.2 Description of Operations

Explains the operational procedures for duplex printing.

14.5 Disassembly and Replacement

Instructions for disassembling and replacing ADU components.

15. Power Supply Unit

15.1 Construction

Describes the construction of the power supply unit, including AC filter and DC outputs.

15.2 Operation of DC Output Circuits

Explains the sequence of power supply output during startup and shutdown.

15.4 Fuse

Information on fuses and troubleshooting related to blown fuses.

15.6 Sequence of Power Supply

Timing chart illustrating the power supply sequence.

16. PC Boards

16.1 PWA-F-SYS

Diagram and identification of the main system PC board.

16.2 PWA-F-LGC

Diagram and identification of the LGC PC board.

16.3 PWA-F-SLG

Diagram and identification of the SLG PC board.

16.4 PWA-F-CCD

Diagram and identification of the CCD PC board.

16.5 PWA-F-LRL

Diagram and identification of the LRL PC board.

16.6 PWA-F-LDR

Diagram and identification of the LDR PC board.

16.7 PWA-F-SNS

Diagram and identification of the SNS PC board.

16.8 PWA-F-ADU

Diagram and identification of the ADU PC board.

16.9 PWA-F-DSP

Diagram and identification of the DSP PC board.

16.10 PWA-F-KEY

Diagram and identification of the KEY PC board.

16.11 PWA-F-FIL

Diagram and identification of the FIL PC board.

16.12 PWA-F-FUS

Diagram and identification of the FUS PC board.