Second Btr & Fuser; Main Function - Dell 3010CN Service Manual

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3.4 Second BTR & FUSER

Second BTR is a conductive roll, which contacts rear side from toner transferred side of paper

and to which negative voltage is applied from HVPS.

2nd BTR Retract Motor actuates when the toner image on the belt is transferred on the paper.

The motor drives the shaft rotation, and the cam attached to the shaft rotates accordingly. The

cam advances the BTR (makes the BTR touch the paper), and the toner image is transferred.

When the image transfer is completed, the motor rotates, and the BTR returns to the retract

position by the spring.

2nd BTR Retract Sensor detects the BTR position. The shaft with cam which retracts the BTR

is provided with a sensor actuator, and when the sensor is shielded, the BTR is retracted, and

when the light is received, the BTR is advanced.

2nd BTR Retract Sensor

Chapter 6 Principle s of O peration

2nd BTR Retract Motor

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