Specifications

The exposure lamp voltage consists of the following 3 factors:
Exposure lamp voltage = Base lamp voltage factor
+
Reproduction ratio correction factor
+
Drum wear correction factor
3.7.1 Base Lamp Voltage Factor In Manual Image Density Control
Manual ID Level 1234567
Exposure Lamp Data Vo –4
Vo ±0 Vo ±0 Vo ±0
Vo +4 Vo +8 Vo +12
The above table shows changes in the exposure lamp data in manual image
density mode.
SP mode #48 sets the exposure lamp data for level 4 (Vo) of manual image
density mode. A value from 100 to 150 can be selected.
3.7.2 Base Lamp Voltage Factor In Auto Image Density Control
In auto ID mode, the CPU selects the level 4 (Vo) exposure lamp data
regardless of the input from the auto image density sensor. When the auto
image density level is set to lighter in SP mode #34, the exposure lamp data
changes to that of manual ID level 5 as shown below. When the auto image
density level is set to darker, the development bias shifts +40 volts. Only the
development bias varies according to the input from the auto image density
sensor. (See page 2-30).
Auto Image Density Level (SP mode #34)
Auto Image Density
Level
SP Data
(SP mode #34)
Exposure Lamp Data
Development Bias
Shift
Normal 0
Same as level 4
(Vo ±0)
±0 volts
Darker 1
Same as level 4
(Vo ±0)
+40 volts
Lighter 2
Same as level 5
(Vo +4)
±0 volts
Darker Lighter
1 December 1990
2-18