Two types of biases, a high-output bias and a low-output bias, are applied to the static eliminator using the static eliminator bias drive signal (/DISDCFOT) and

static eliminator bias output level signal (/DSCPWM) issued from the DC controller PCB according to the type of the print sequence, thus allowing the printing

paper to separate easily from the photosensitive drum.

6.9 Photosensitive Drum Cleaning

6.9.1 Outline

Toner reaming on the photosensitive drum after image transfer is scraped by the photosensitive drum cleaner blade and is fed in the waste toner box.

6.9.2 Waste Toner Full Detection

The waste toner collected by the cleaner blade is fed to the waste toner box using the waste toner feed screw in the drum unit. A torque limiter is provided at the

end of the waste toner feed screw is provided with a torque limiter. When the waste toner box is filled with waste toner, the torque limiter goes on to stop the waster

toner feed screw. As a result, the sensor flag of the waster toner full sensor (SR206) is pushed intermittently, reporting the waste toner full condition to the DC

controller PCB.

[1] Cleaner blade

[2] Waste toner stirring rod

[3] Waste toner box

[4] Torque limiter

[5] Drum

MEMO:

The waste toner box is capable of storing about 630 g of toner.

DC controller

High-voltage power supply PCB

PCB

Static eliminator bias circuit