Ricoh Aficio 2022, Service Manual

Page: 232 / 849

SERVICE PROGRAM MODE
B089/B093 4-16 SM
SP2XXX: Drum
2001* Charge Roller Bias Adjustment
2001 1* Printing
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 ~ 1500 / –1700 / 1 V/step]
2001 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 SP20011.
[0 ~ 400 / 200 / 1 V/step]
2001 3 Temporary Input
Inputs the charge roller voltage temporarily for test purposes.
Do not change the value.
[0 ~ –2500 / 0 / 1 V/step]
2005* Charge Roller Bias Correction
2005 1 Vsdp Min
Adjusts the lower threshold value for the charge roller correction.
When the value of Vsdp/Vsg is less than this value, the charge roller voltage
increases by 50V (e.g. from –500 to –550). The size of the increase depends on
SP2005 3.
[0 ~ 100 / 90 / 1%/step]
2005 2 Vsdp Max
Adjusts the upper threshold value for the charge roller correction.
When the value of Vsdp/Vsg is greater than this value, the charge roller voltage
decreases by 50V (e.g. from –550 to –500). The size of the decrease depends on
SP2005 3.
[0 ~ 100 / 95 / 1 %/step]
2005 3 Charge Roller Bias Correction
Adjusts the size of the charge roller voltage correction.
[0 ~ 200 / 50 / 1 V/step]