13

13.3 Functions

(1)IH coil (IH: Induction Heating)

The IH coil is inside the fuser roller and applies the induction heating to the fuser roller. The coil is fixed at a position and does not move when the fuser roller is rotating.

(2)Fuser roller

The fuser roller is a metal roller which generates heat spontaneously with eddy current produced by the electromagnetic induction of IH coil. The fuser roller is heated by this self-heating of this roller, and then the toner is fused on the paper.

(3)Pressure roller

The pressure roller is a sponge roller which assures the nip amount between the fuser roller. The pressure arm and spring press the fuser roller.

The toner is fused effectively by the pressure of this roller.

(4)Separation fingers

The separation fingers are installed, five above the pressure roller and six above the fuser roller, in order to separate the paper adhered on each roller.

(5)Cleaning roller

The cleaning roller is a fluorinated metal roller which removes the residual toner and paper dust adhered on the pressure roller.

(6)Main thermistor

This thermistor detects the temperature of the fuser roller to maintain it in a certain temperature range (actually around 200°C) between the lower limit causing the poor fusing and the upper limit causing the high temperature offsetting. When the temperature of the fuser roller is lower than the preset temperature, it turns ON the power supply to the IH coil, and when it is higher than the preset temperature, it cuts off the supply.

(7)Edge thermistor

It detects the temperature abnormality at the both ends of the fuser roller. This area may be overheated without heat absorption by paper since paper does not pass through this area. This thermistor is not related to the temperature control of the fuser roller.

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

13 - © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved

FUSER UNIT / PAPER EXIT SECTION

 

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Toshiba 452, 453, 350, 353 service manual 13 2003 2008 Toshiba TEC Corporation All rights reserved
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350, 353, 453, 452 specifications

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