Ricoh D072 Service Manual page 455

System Service Mode (Basic: D067/D072)
SP2-XXX (Drum)
2001* CR Bias Adj
Printing
2001 1 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.
ID sensor pattern
2001 2 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.
Erase Margin Adj
2101*
2101 1 Leading Edge
Trailing Edge
2101 2
The rear trailing edge is this value plus 1.2 mm.
Left side
2101 3
The rear left edge is this value plus 0.3 mm.
Right side
2101 4
The rear right edge is this value plus 0.3 mm.
D067/D068/D069/D072
[–2100 to –1500 / –1650 / 1 V/step]
[0 to 400 / 300 / 1 V/step]
Adjusts the width of the erased area (
"Adjusting Copy Image Area" in the section
"Replacement and Adjustment").
[0.0 to 9.0 / 3.0 / 0.1 mm/step]
Specification: 2 ± 1.5 mm
[0.0 to 9.0 / 4.0 / 0.1 mm/step]
Specification: 2 +2.5/–1.5 mm
[0.0 to 9.0 / 2.0 / 0.1 mm/step]
Specification: 2 ± 1.5 mm
[0.0 to 9.0 / 2.0 / 0.1 mm/step]
Specification: 2 +2.5/–1.5 mm
5-146 SM Appendix