Ricoh FW 810, Service Manual

Page: 46 / 170

4.5.3 Auto Image Density Bias
The above chart shows the development bias when in ADS mode. The ADS
can be switched to the "Darker" setting with service program mode #20.
In addition to the development bias, the image density is also controlled by
varying the exposure light intensity. (See the exposure section.)
4.5.4 Bias Adjustment
Using service program mode #19, the bias level can be increased or
decreased as shown in the above chart.
-280
-240
-200
-180
Normal
ADS
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
-180
-260
-220
-160
Darker
ADS
ADS Vod/Vsd
Vod: Original Density Detecting Voltage (ADS out put voltage)
Vsd: Standard Pattern (White Plate) Density Detecting Voltage
0.18 0.85
0.77
0.73
Lighter
ADS
-300
-260
-220
-200
Program Mode #19
1 2 3 4 0
Bias
Adjustment
(Volts)
+20
0
-20
+40
-40
6 January 1990
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