Correction For Machine Internal Temperature; Copy Speed Reduction (Cpm Down Mode) - Ricoh B132 Service Manual

THERMISTORS, THERMOSTATS

Correction for Machine Internal Temperature

If the temperature inside the machine is less than 20 ºC, all target fusing
temperatures are increased by 5 ºC.
If the temperature inside the machine is more than 20 ºC, the standby temperature
is decreased by 5 ºC.
The temperature inside the machine is measured with the temperature sensor that
is near the waste toner bottle.

Copy Speed Reduction (CPM Down Mode)

During copying, the target temperature is 175 ºC (plain paper).
If the room temperature is low (less than 10 ºC), the fusing unit temperature can
become low as well.
To compensate for this, copy speed is reduced, as explained below.
After 20 copies, if the fusing unit temperature is 165 ºC or less, the copier goes into
1st CPM Down Mode. At this time, the copy speed decreases to 55 cpm (black-
and-white) and 30 cpm (color).
After 10 more copies, if the fusing unit temperature is less than 165 ºC, the copier
goes into 2nd CPM Down Mode. At this time, the copy speed decreases to 45
cpm (black-and-white) and 25 cpm (color).
If the fusing temperature increases to 175 ºC, the copier speed goes back up one
level (to 1st CPM Down Mode, or to full copying speed).
B132/B200 6-140 SM