Ricoh D017 Service Manual page 447

System SP Tables-2
2201* Development Bias Adjust
Printing
Adjusts the development bias during printing.
1
This can be adjusted as a temporary measure if faint copies appear due to
an aging drum.
[–1500 to –200 / –650 / 1 V/step]
ID Sensor Pattern
Adjusts the development bias for making the ID sensor pattern.
The actual development voltage for the ID sensor pattern is this value plus
2
the value of SP2201-1.
This should not be used in the field, because it affects ID sensor pattern
density, which affects toner supply.
[0 = N (200V) / 1 = H (240V) / 2 = L (160V) / 3 = HH (280V) / 4 = LL (120V)]
2210* Bias Off Time
Charge Bias DFU
Adjusts the charge voltage (-1200V) application time.
When the charge voltage and development bias are turned off at the same
time, toner or carrier will be attracted to the drum. To reduce the toner or
1
carrier attraction, the machine applies –1200V to the charge roller before the
development bias is turned off. This SP adjusts the time for applying the
charge.
[0 to 150 / 80 / 1 ms /step]
Development Bias DFU
2
Adjusts the development bias off time.
[-120 to 120 / 0 / 1ms/step]
D017/D018/D019/D020/D084/D085 4-14 SM Appendix