12

12.4  Auto-Toner Circuit

12.4.1  General description

(1)Function of the auto-toner circuit

·Detects the toner density in the developer material, and supplies toner when the density is low- ered to a certain level.

·Detects that there is no toner left in the cartridge (toner-empty detection).

(2)The auto-toner circuit consists of the following:

· Auto-toner sensor

: Detects the toner density.

· Control section

: Controls the toner density so that the toner in the developer material is

 

fixed to certain ratio.

· Toner motor

: Supplies toner to the developer material.

· Display

: Indicates toner-empty information.

Control panel

 

 

Arithmetic and control unit

 

 

 

 

 

 

SYS board

Display panel

 

 

 

 

 

 

 

e-STUDIO352/353/452/453

e-STUDIO350/450

 

 

FRAM

CPU

 

NVRAM

 

 

IC21

IC15

 

IC38

 

 

 

 

 

CPU

 

 

ASIC GA

North bridge

ASIC GA

 

 

 

 

 

 

IC52

 

 

IC23

IC14

IC54

 

Toner cartridge

 

 

 

 

LGC board

 

 

 

 

 

Toner

Toner

 

 

 

 

motor

Control

D/A

 

 

 

 

ASIC GA

 

 

 

voltage signal

converter

 

 

 

 

 

 

 

 

IC2

IC38

Engine

 

 

 

 

CPU

 

 

 

 

 

 

 

Toner density

 

 

 

 

Auto-toner sensor

signal

 

 

IC24

 

 

 

 

 

 

 

 

 

 

 

 

 

TA8428

 

Developer material

 

 

 

 

 

 

 

 

IC51

 

Developer unit

 

 

 

 

 

 

Fig. 12-401

 

 

e-STUDIO350/352/353/450/452/453

12 - © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved

DEVELOPMENT SYSTEM

07/11

 

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Toshiba service manual Auto-Toner Circuit, STUDIO352/353/452/453 STUDIO350/450
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350, 353, 453, 452 specifications

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