Dell 3010cn - Color Laser Printer, Service Manual

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3.4 Second BTR & FUSER
3.4.1 Main function
T
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.
T 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.
T
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.
Leg_Sec06_070FB
2nd BTR
2nd BTR Retract Sensor
2nd BTR Retract Motor
Chapter 6 Principle
s
of
O
peration