Ricoh D009 Service Manual page 617

Image Fusing
After the machine has completed printing a total of 0 to 5 sheets continuously (adjustable
with SP3905-001: default 5), the fusing motor waits for 15 seconds at the end of the job, and
then switches on for 15 sec. This 15 sec. off/on cycle, called "Cleaning A", is done once.
2nd Cleaning Mode
After the machine has completed printing a total of 6 to 49 sheets continuously (adjustable
with SP3905-003: default 30), Cleaning A is done twice at the end of the job.
3rd Cleaning Mode
After the machine has completed printing a total of 50 to 999 sheets continuously
(adjustable with SP3905-005: default 100), Cleaning A is done twice at the end of the job.
After that, the fusing motor waits for 45 sec. again and then switches on for 15 sec. This
off/on cycle (45 sec. wait and 15 sec. rotate) is called "Cleaning B".
SM 6-67 D009/D011/D012/D013