Ricoh Ch-C1 Series Service Training page 478

PTB Sensor

The PTR drive motor drives the transport belt through gears and the transport
belt drive roller.

The PTB fan draws air in and exhausts it below through holes in the transport
belt, in order to hold paper on the transport belt. In this way, paper is
transferred to the fusing unit while keeping it on the transport belt.

The PTB sensor [D] detects paper jams.
Slide 478
 The PTR drive motor also drives the paper transfer roller and the ITB
cleaning unit.
Drive
PTR Drive
Motor
PTB Fan
478
Ch-C1 Training