Development Bias - Ricoh G190 Service Manual

forward and rearward to mix the developer.
This occurs at these times:
Immediately after a new PCU is installed.
During the process control self check
During toner supply
During development.
Every 36 hours (can be changed with SP 3554 003)
If absolute humidity changes more than ± 6 g/m
humidity threshold can be changed with SP 3554 004.

6.6.4 DEVELOPMENT BIAS

The high voltage supply board #2 supplies development bias to the development roller
through the receptacle at the rear of each development unit.
There are ac and dc bias voltages. The ac bias improves toner transfer to the drum.
The machine automatically controls the dc bias, if automatic process control is enabled.
However, if process control is turned off, (that is, if SP3-501-001 is set to 1), the dc bias is
the value stored in SP2212-001 to –009 (do not adjust in the field unless told to do this).
SM
3
(e.g. 23°C/ 50%
6-45
Development
27°C/ 70%). The
G190