Ricoh Ch-C1 Series Service Training page 474

 Toner remaining on the PTR is sent back to the ITB, by reversing
the polarity of the PTR while it is in contact with the ITB.
 It is done at the start of each job, or when recovering from a
paper jam or SC condition.
 The duration of cleaning when recovering from a jam or SC can be
 Pro models only: Cleaning is done between every sheet. Voltage
for the non-image area is applied between sheets. The timing for
switching between image and non-image areas can be adjusted
with SP mode.
Slide 474
No additional notes
Cleaning
adjusted with SP 2692-001.
474
Ch-C1 Training