Sp2000 Drum - Ricoh D131 Service Manual

SP2000 Drum

3.3 SP2000 DRUM
2001 Charge Roller Bias Adjustment
1 Applied Voltage for Image Processing
Adjusts the voltage applied to the grid plate during copying when auto process
control is off.
[600 to 1500/900/10 V]
After replacing the charge corona wire or the drum, reset to the factory default
setting.
2 ID Sensor Pattern: Adjustment of Applied Voltage
Adjusts the voltage applied to the grid plate when the ID sensor pattern is
created.
[600 to 1500/800/10 V]
3 Setting for Total Bias Current
Adjusts the total current applied to the charge corona wire. DFU
[900 to 1500/1300/10
4 Setting for Total Bias Current of Grid
Adjusts the voltage applied to the grid plate during copying when auto process
control is on.
[600 to 1500/900/10 V]
This voltage changes every time auto process control starts up (every time the
machine is switched on).
5 Total Bias Grid Voltage: OHP Total
Adjusts the voltage applied to the grid plate when OHP mode is selected.
[600 to 1500/650/10 V]
Use this if there is a copy quality problem when making OHP's.
6 Total Bias Grid Current: Photo Mode Total
Adjusts the voltage applied to the grid plate when Photo mode is selected.
[1400 to 2800/1500/10
D131/D132/D133
A]
A]
3-18 SM Appendix