(2)Function of auto-toner sensor

The auto-toner sensor consists of the following circuits:

· Drive winding

: A magnetic head (primary side) with a high-frequency magnetic field,

 

which forms a magnetic circuit in the developer material.

· Detection winding

: Receives the change in the magnetic resistance of the developer material

 

through the magnetic circuit (secondary side).

·DC conversion circuit : Converts a high-frequency output from the detection winding into a DC signal (auto-toner output VATS).

Magnetc resstance

Drve

wndng

(Developer materal)

Magnetc crcut

Detecton

 

 

DC

 

 

converson

wndng

 

 

 

 

crcut

 

 

 

 

 

 

 

Auto-toner

output To the man CPU(LGC board)

VATS

12

Fig. 12-402

When the toner density is low—

The ratio of the toner against the carrier in the developer material decreases. →The magnetic resistance decreases.

→The detection output increases.

→The auto-toner output VATS increases.

When the toner density is high—

The ratio of the toner against the carrier in the developer material increases. →The magnetic resistance increases.

→The detection output decreases.

→The auto-toner output VATS decreases.

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

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

DEVELOPMENT SYSTEM

 

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Toshiba 452, 453, 350, 353 service manual Drve ndng
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350, 353, 453, 452 specifications

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