Ricoh Ch-C1 Series Service Training page 468

 The PTR drive motor rotates the paper transfer roller.
 An encoder monitors the roller rotation and feeds back the data
to the motor.
 The PTR drive motor also drives the paper transport belt and the
ITB cleaning unit.
Slide 468
 The PTR drive motor also drives the paper transport belt and the ITB
cleaning unit.
PTR Drive
Encoder
468
Ch-C1 Training
PTR Drive
Motor