Ricoh B286 Service Manual page 315

1939 Press FB Ctrl Step by Width
Use these SP's to set up the step control used in the paper type and paper
thickness selections done in the User Tools (see "Paper Thickness Default
Selection" in this section).
1 > 611mm
2 461-610mm
3 298-460mm
4 > 297mm
1940 CPM Down Setting
CPM down control attempts to achieve optimum fusing of toner to paper. To do
this, it automatically adjusts the timing of paper feed, which increases the length
of the interval between sheets. A longer interval between sheets creates a short
delay, so that the temperature of the hot roller and pressure roller can rise.
1 Enable
Switches CPM down off and on.
[0 to 1/1/1]
0: Off
1: On
11 Temp Differential: Step 1
The interval between sheets of paper in the paper path is determined by the
temperature readings of the thermistors at the center and end of the pressure
roller.
This SP sets Step 1 of CPM down mode. If the amount of the difference between
the actual temperature and target temperature falls in the range between this SP
and SP1940 012, this is judged as Step 1.
[0 to 150/50/5]
12 Temp Differential: Step 2
SM
First, use SP1938 to select the paper type and mode
where the setting is to apply. Next, select the paper width
here.
[0 to 30/30/5]
5-45
SP1-xxx Feed
B286/B289