Sharp SF-1014 Service Manual page 82

Purpose/kind Section
Adjustment Optical unit
Main Sub
code code
47 Used to store the characteristics of the AE sensor and the optical section for
the change in the copy lamp applying voltage. The exposure level in the auto
copy mode is automatically determined by the stored data and the document
density.
This simulation is used to correct the output characteristics of the AE sensor
output characteristics, which differ in different machines.
Copy lamp application voltage to AE sensor
output characteristics
(When simulation 47 is performed)
AE sensor
output level
(AE sensor
light receotion
amount)
[V] 80(160)
Copy lamp application voltage (Exposure amount)
(Operation/procedure)
When the simulation key operation is performed, the scanner unit performs
initializing and feeds about 10cm and stops.
When the print button is pressed again, the copy lamp applying voltage chan-
ges from 80V (160V) to 50V (100V) by the increment of 5V. The AE sensor
output characteristics at that time are stored in the main PWB RAM.
At that time, the AE sensor gain is automatically adjusted.
This operation must be performed before the copy density adjustment in the
auto copy mode.
48 1 Used to adjust the vertical (Machine front to rear) copy magnification ratio.
The adjustment is performed by changing the lens home position arbitrarily.
(Operation/procedure)
When the simulation key operation is performed, the currently set value is
displayed on the COPIES SELECTED display.
Enter the adjustment value with the numeric key and press the print button,
and the value will be stored in the main PWB RAM.
It is required to make a copy and adjust. However, the rough input value can
be obtained from the following formula:
Input value = Current set value + Magnification ratio correction rate × 10
2 Used to adjust the horizontal magnification ratio.(Lead to Trail)
The adjustment is performed by changing the scanning speed of the scanner
(mirror motor).
(Operation/procedure)
When the simulation key operation is performed, the currently set value is
displayed on the COPIES SELECTED display.
Enter the adjustment value with the numeric key and press the print button,
and the value will be stored in the main PWB RAM.
It is required to make a copy and adjust. However, the rough input value can
be obtained from the following formula:
Input value = Currently set value + copy magnification ratio x 10
Copy magnification ratio = (Document length – Copy image length) ÷
Document length x 100 [%]
4 Exposure correction in enlargement copy of 120% or more
Exposure correction voltage in enlargement copy of 120% or more
V = V + N * 0.3V Normal N = 0
V: Reference copy lamp voltage
v: Voltage after exposure correction
Contents
Description
Copy lamp
application
voltage
50(100)
8 – 5
Ref. page
AE sensor output to copy lamp application
voltage characteristics (AE copy mode)
[V]
Dark
AE sensor output level (Document density)
7-26
Light
7-15
7-16