Image Bias Voltage Adjustment - Ricoh A151 Field Service Manual

8.3 IMAGE BIAS VOLTAGE ADJUSTMENT

When:
Purpose:
How to Adjust:
How it works:
Data (SP37)
Bias Voltage [V]
Image Density
NOTE: V is the standard voltage applied to the development roller.
0
1. Make a copy after adjusting the light intensity.
2. If the image is blurred:
Decrease the bias voltage by one step and readjust the light intensity.
If the background is dirty:
Increase the bias voltage by one step and readjust the light intensity.
A151/A152
1. The image is blurred even though the image
density in black solid areas is acceptable.
2. Dirty background. The problem is not caused
by excess toner and cannot be solved by
adjusting the light intensity.
To improve the copy image.
SP37
Changes the bias voltage while the image area on
the drum is being developed.
0 1
V V +40
0 0
Normal Darkest
5-76
2 3
V +20 V –20
0 0
Darker Lighter
4
V –40
0
Lightest
FSM