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Main code
Sub code
44
05
Grid voltage correction operation test
Used to perform the grid voltage correction and to display the measure data on the copy quantity display.
When this simulation is executed, the grid voltage correction is automatically performed. The image density
sensor is read when -30V, 0V, and +30V are applied to the latest patch forming grid voltage.
After completion of the operation, the measure data are displayed on the copy quantity display.
Since there are two or more display items, the third digit is used to make distinction between the light reception
level and the original judgment level, and the lower two digits are used to display the data.
The display is selected by the magnification ratio key.
The data displayed by the lower two digits are A/D input values of the original sensor, and is expressed in
decimal. (Display range: 0 ∼ 99)
The patch forming grid voltage after execution of this simulation can be checked with SIM 44-9.
06
Grid voltage correction compulsory execution
The grid voltage correction is forcibly executed during the simulation.
When the operation is completed, the patch forming grid voltage after grid voltage correction is displayed on the
copy quantity display. The relationship between the display value and the patch forming grid voltage value is as
shown below.
The drum surface data and the patch data after execution of this simulation can be checked with SIM 44-10.
(Note) When this simulation is executed, the patch forming grid voltage is stored, and the grid voltage amount may
07
Image density sensor, drum mark sensor operation test
Used to read the light reception level for the light emitting amount of the image density sensor and the drum mark
sensor and to display on the copy quantity display.
When this simulation is executed, the light emitting levels of the image density sensor and the drum mark sensor
are changed in 5 steps and each light reception level is read.
After completion of operation, the measured data are displayed on the copy quantity display.
Since there are two or more display items, the third digit is used to make distinction between the light reception
level and the original judgment level, and the lower two digits are used to display the data.
The display is selected by the magnification ratio key.
The data displayed with the lower two digits:
"A" ∼ "E": Image density sensor A/D input value. Converted into a decimal number and displayed. (Display range:
"F" ∼ "J": Drum mark sensor level is displayed with 0 and 1.
Copy quantity display
3rd digit
2nd, 1st digits
A
Measured
data
b
C
d
E
F
Display value
Patch forming grid voltage
8
200 V
50
410 V
99
655 V
be changed from the patch forming grid voltage before and after execution.
Copy quantity display
3rd digit
2nd, 1st digits
A
Measured
data
b
C
d
E
F
Judgement
data
G
H
I
J
0 ∼ 99)
"0": Drum mark sensor sensing impossible
"1": Drum mark sensor sensing possible
Content
Display data (Image density sensor A/D input value)
Drum surface data (patch forming grid voltage) –30V is applied.
Drum surface data (patch forming grid voltage) is applied.
Drum surface data (patch forming grid voltage) is applied.
Patch data (patch forming grid voltage) -30V is applied.
Patch data (patch forming grid voltage) is applied.
Patch data (patch forming grid voltage) +30V is applied.
Display range: 8 ∼ 99
When the display is
changed by 1, the
voltage is changed by 5V.
Display data
Image density sensor input value, when light emitting 1V
Image density sensor input value, when light emitting 2V
Image density sensor input value, when light emitting 3V
Image density sensor input value, when light emitting 4V
Image density sensor input value, when light emitting 5V
Drum mark sensor level, when light emitting 1V
Drum mark sensor level, when light emitting 2V
Drum mark sensor level, when light emitting 3V
Drum mark sensor level, when light emitting 4V
Drum mark sensor level, when light emitting 5V
8 – 10
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