Ricoh FT 4015, Service Manual

Page: 177 / 229

8.1.2 Image Density Adjustment
When: The customer requires the image density to be either darker or lighter.
Purpose: To get proper image density.
Method: SP34
How it works: Changes the ac drive/dc power board output voltage.
NOTE: SP34 settings can be changed by customers.
- SP34: Image Density Adjustment (ADS Mode) -
Setting 0 1 2 3 4
Bias Voltage
Change [V]
±
0 –40 +40 –40 +40
Exposure Lamp Change
±
0
±
0
±
0
+4 steps –4 steps
Image Density Normal Lighter Darker Lightest Darkest
1 step = 0.5 V (120 V machines) or 1.0 V (230 V machines)
- SP62 V
L
Correction Interval -
Setting V
L
Correction Interval
0 2 steps/8,000 copies
1 2 steps/6,000 copies
2 2 steps/4,000 copies
3 2 steps/2,000 copies
4 2 steps/1,000 copies
5 No correction
1 step = 0.5 V (120 V machines) or 1.0 V (230 V machines)
Replacement
Adju
stment
20 December 1996 COPY QUALITY ADJUSTMENT
6-51