System SP Tables-2 
D017/D018/D019/D020/D084/D085 4-10  SM Appendix 
4.2  SYSTEM SP TABLES-2 
4.2.1 SP2XXX: DRUM 
 
2001* Charge Bias  
 1* 
Setting (Copying) 
Adjusts the voltage applied to the charge roller during printing. 
This value will be changed automatically when the charge roller bias 
correction is performed. 
Note that if this value is changed, the charge roller voltage will be corrected 
based on the new voltage. 
[2100 to 1500 / –1700 / 1 V/step] 
 2* 
ID Sensor Pattern 
Adjusts the voltage applied to the charge roller when making the Vsdp ID 
sensor pattern (for charge roller bias correction). 
The actual charge roller voltage is this value plus the value of SP2001 1. 
[0 to 400 / 200 / 1 V/step] 
 3 
Temporary Input 
Inputs the charge roller voltage temporarily for test purposes. 
Do not change the value. 
[0 to –2500 / 0 / 1 V/step]