Ricoh M080 Service Manual page 192

Printer Engine Service Mode
Thermistor Adj DFU
If this is "Yes", the machine automatically adjusts the charge roller voltage
2910
and transfer current in response to the temperature in the machine.
[Yes/ No]
Waste Toner Cnt
2980
Displays the waste toner count.
M080
Thermistor Adjustment
Used Toner Count
3-14 SM Appendix