Sharp SF-2314, Service Manual

Page: 91 / 131

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Description
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Adjustment Optical unit 46 1 Used to adjust the copy density (exposure level) and the copy density gradient
(exposure gradient) in each copy mode.
The exposure level is changed by changing the copy lamp applying voltage.
The adjustment points are exposure levels "1" and "5" in each copy mode.
The copy density (exposure level) and the copy density gradient (exposure
gradient) can be adjusted arbitrarily. 7-26
(Operation/procedure)
When the simulation key operation is performed, the currently set exposure
level will be displayed on the COPIES SELECTED display.
Select exposure level "1" or "5" with the copy density adjustment key, and
enter the set value with the numeral keys and press the print button. Then the
set value is stored.
To select each copy mode, use the copy mode key.
Copy density adjustment mode
Exposure
level
Sim No
Original
table copy
mode Normal mode Non-toner-save mode 1 5 46-1
Toner save mode 1 5
Photo mode Non-toner-save mode 1 5
Auto mode Non-toner-save mode 1 5
Toner save mode 1 5
SPF copy
mode Normal mode Non-toner-save mode Set to the
copy mode in
the original
table copy
mode. 51-6
Toner save mode
Photo mode Non-toner-save mode
Auto mode Non-toner-save mode
Toner save mode
Copy density level (exposure level (copy lamp applying voltage) to operation
panel density display level)
In the manual copy mode and the photo copy mode
Set point A (exposure level (copy lamp applying voltage) at copy density level
"1") and point B (exposure level (copy lamp applying voltage) at copy density
level "5"), and the exposure gradient (copy density gradient) and the exposure
level (copy density level) will be set.
A – B characteristic: A great exposure gradient (copy density gradient).
A
′
– B
′
characteristic: A small exposure gradient (copy density gradient).
Point A and point B can be set arbitrarily.
51 6 Used to set the correction value of the copy lamp voltage when the SPF is
used.
In copying with the SPF, the exposure level varies more than in the normal
copying. To compensate this, the copy lamp voltage is corrected by this
simulation.
(Operation/procedure)
When the simulation key operation is performed, the currently set correction
value will be displayed on the COPIES SELECTED display. 7-28
1 2 3 4 5
B'
B
A
A'
MAX 85V (170V)
MIN 40V (80V)
Great
Exposure
Small
Light
Copy
density
Dark
Copy lamp
application
voltage
( ): 200V system Density display level in the operation panel
8 – 4