System Service Mode 
SM Appendix  3-5  D115/D116 
Appendix: 
SP Mode 
Tables 
SP2-XXX (Drum) 
 
2001* 
CR Bias Adj 
2001 1 
Printing 
[–2100 to –1500 / –1650 / 1 V/step] 
Adjusts the voltage applied to the charge roller for printing. The voltage 
changes automatically as charge-roller voltage control works. The value here 
is the base value for the charge-roller voltage control. 
2001 2 
ID sensor pattern 
[0 to 400 / 300 / 1 V/step] 
Adjusts the voltage applied to the charge roller for the ID sensor pattern (as 
part of charge-roller voltage correction). The charge-roller voltage is obtained 
by adding SP2-001-002 to the value of SP2-001-001. 
 
2101* 
Erase Margin Adj 
Adjusts the width of the erased area (
 
"Adjusting Copy Image Area" in the section 
"Replacement and Adjustment"). 
2101 1  Leading Edge 
[0.0 to 9.0 / 3.0 / 0.1 mm/step] 
Specification: 2 ± 1.5 mm 
2101 2 
Trailing Edge 
[0.0 to 9.0 / 4.0 / 0.1 mm/step] 
Specification: 2 +2.5/–1.5 mm 
The rear trailing edge is this value plus 1.2 mm. 
2101 3 
Left side 
[0.0 to 9.0 / 2.0 / 0.1 mm/step] 
Specification: 2 ± 1.5 mm 
The rear left edge is this value plus 0.3 mm. 
2101 4 
Right side 
[0.0 to 9.0 / 2.0 / 0.1 mm/step] 
Specification: 2 +2.5/–1.5 mm 
The rear right edge is this value plus 0.3 mm.