EPSON AcuLaser CX11/CX11F Revision B
OPERATING PRINCIPLES Printer Section Operating Principle 115
SECOND BTR
 2ND BTR ASSY
The Second BTR (2ND BTR ASSY) is a conductive roll. It contacts the back of
paper (back of the side to be printed on) and a voltage is applied from the HVPS.
 2nd BTR Retract Motor
Brings the BTR to contact the paper during 2nd transfer process, and moves the
BTR away from the paper after the transfer is finished. The motor drive rotates the
shaft and the eccentric cam attached on the shaft. The eccentric cam pushes the
lever for the BTR to bring it contact with the paper for transferring toner image on
the BTR to the paper. When the transferring is finished, the motor starts to rotate
again and the lever is returned to its original position by spring force, causing the
BTR to move away from the paper.
 SENSOR 2BTR RETRACT
The position of BTR is detected by the SENSOR 2BTR RETRACT. The shaft
with the cam for contacting/releasing BTR is provided with a Sensor actuator. The
non-contact state of BTR is detected by the actuator shielding the Sensor, and the
contact state of the BTR is detected when the Sensor is subjected to light.
 Replacing the 2ND BTR is required when the life count (printed pages) exceeds
the prescribed value.
Figure 2-51. SENSOR 2BTR RETRACT
Leg_Sec06_070FB
2ND BTR ASSY
SENSOR 2BTR RETRACT
MOT ASSY MICRO
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