Learn the basic configuration by going through the following subjects

Basic Configuration

Study the functional configuration

Functional Configuration

　

○Purpose: Here, you will learn about the functional configuration to understand the overview of this machine.

　

　

1. Overview

This machine can be divided, in terms of function, into 7 blocks: "document exposure system," "image processing system," "printer control system," "laser exposure system," "image forming system," "fixing system," and "pick-up/feeding system."
When the machine starts the copy operation, the document exposure system reads a document placed on the copyboard glass. The image data of the document is sent to the image processing system and converted into print data (video signals). Then, the video signals are sent along with a print command to the printer control system. When the printer control system receives the print command, it starts the print operation as controlling the laser exposure system, image forming system, fixing system, and pick-up/feeding system.

　

Mark Block Role A Document exposure system To read a document using the contact image sensor (CIS) B Image processing system To convert image data sent from the document exposure system or an external device into print data (video signals) C Printer control system To conduct the print operation as controlling the laser exposure system, image forming system, fixing system, and pick-up/feeding system D Laser exposure system To emit laser in accordance with a video signal and irradiate it to the photosensitive drum. E Image forming system To form toner image on print paper F Fixing system To change toner image on print paper into permanent image G Pick-up/Feeding system To feed print paper inside the machine.

　

　[1] HDD

[2] Optional PCBs

[3] Photosensitive drum

[4] Primary charging

[5] Developing

[6] Transfer

[7] Fixing

[8] Delivery

[9] Pick-up control

[10] Cassette 1

[11] Cassette 2

[12] Reader controller PCB

[13] Main controller PCB

[14] DC controller PCB

Detailed information of each block will be provided in the next subject.

Study the PCB configuration

Purpose: Here, you will learn about PCBs on this machine.

　

　

1. Overview

Information on the major PCBs on this machine is given below.

　

Block Role Connector layout Reader controller PCB To control the contact image sensor Main controller PCB To convert image data sent from the reader controller or an external device into video signals DC controller PCB To make a communication with the main controller and control the printer High voltage PCB To generate various high-voltage power supplies - AC driver PCB To supply AC power fed from an outlet to power supply PCBs - Accessories power supply PCB To generate DC power and supply it to delivery system accessories - Printer power supply PCB To generate DC power and supply it to the printer - Controller power supply PCB To generate DC power and supply it to system accessories -

　

　

○Photo showing the PCB configuration 

   1) Rear side of the copier

　

   2) Front side of the copier

Study the basic sequences

Purpose: Here, you will learn about the basic sequence.

　

　

1. Overview

The system software, which controls this machine, is stored in the HDD.

When the machine starts up, the CPU reads the system software into the image memory (SDRAM) in accordance with the boot program. While the system software is being read to the SDRAM, the startup window is displayed, and the progress bar shows the progress status.

Startup window

Next, the sequence when the power is turned on (startup sequence) and the sequence when the power is turned off (shutdown sequence) are explained.

　

　

2. Startup Sequence

In the startup sequence, preparations to properly start up the machine are made.

The flow of the startup sequence is given below.

3. Shutdown Sequence

The shutdown sequence serves to turn off the power in a way that does not cause damage to the HDD.

If the main power switch is turned off while the HDD is being accessed (e.g., while a job is under way or a MEAP application is in operation), a fault can develop on the HDD. The machine avoids damage to its HDD by offering a specific shutdown sequence.

The flow of the shutdown sequence is given below.

Shutdown confirmation window

To turn off the power, be sure always to follow the shutdown sequence. If you turn off the main power without going through the shutdown sequence, a fault (e.g., E602) may develop on the HDD.