Sp Bias Settings - Ricoh A219 Service Manual

8.2.2 SP Bias Settings

When: 1. The image is blurred in ADS mode, even though the image density in
black solid areas is acceptable.
2. Dirty background in ADS mode. The problem is not caused by
excess toner and cannot be solved by adjusting the light intensity.
Purpose: To get the proper image density
Method: VRB on the high voltage supply board, SP33, SP34
How it works: Changes the bias voltage while the image area on the drum is being
developed.
NOTE: SP34 can be changed by customers.
- SP33 Image Bias Adjustment (Manual ID Mode) -
Setting
Bias Voltage
Change [V]
Image Density
1 step = 0.5 V (120 V machines) or 1.0 V (230 V machines)
- SP34 Image Density Adjustment (ADS Mode) -
Setting
Bias Voltage
Change [V]
Exposure Lamp
Change
Image Density
1 step = 0.5 V (120 V machines) or 1.0 V (230 V machines)
SM
CÓPIA NÃO CONTROLADA
0 1
±0
+40
Normal Darkest
0 1
±0
–40
±0 ±0
Normal Lighter
6-53
CÓPIA NÃO CONTROLADA
COPY QUALITY ADJUSTMENT
2 3
+20 –20
Darker Lighter
2 3
+40 –40
±0
+4 steps
Darker Lightest
4
–40
Lightest
4
+40
–4 steps
Darkest
A219