Sharp AL-2020 Service Manual page 120

Main Sub
Contents
code code
53 08 SPF/RSPF scan position
automatic adjustment
(excluding AL-2020)
61 03 Polygon motor check
(HSYNC output check)
63 01 Shading check
[Function]
Place a A4 paper (white chart) so that it covers the SPF/RSPF scan glass and the OC glass
together, and close the SPF/RSPF.
When this simulation is executed, the current adjustment value is displayed as the initial display.
* Default is 1. Adjustment range is 1 – 99. Adjustment unit 1 = about 0.127mm
* If the values are kept as the default values, SPF/RSPF scan is not performed properly. The
front area of the proper scan position may be scanned.
In case of AUTO, press [START] key, and the mirror unit scans from the home position to the
SPF/RSPF scan position with the adjustment value displayed. The SPF/RSPF glass cover edge
position is calculated from the difference between the SPF/RSPF glass cover edge and the OC
side document glass CCD output level. If the adjustment is normal, the adjusted value is dis-
played. If abnormal, the error LED lights up with the current set value displayed.
During the error LED is lighted, when [START] key is pressed again, execution is performed
again.
Mode
SPF/RSPF scan position
auto adjustment
SPF/RSPF scan position
manual adjustment
[Operation]
The operation is similar to simulation 46-01. (In MANUAL)
OK/ERR display in AUTO
<When OK>
53-08 SPF AUTO
AUTO 100% **
[Function]
When [OK]/[START] key is pressed, HSYNC is performed and the polygon motor is rotated for
30sec.
At that time, the ZOOM lamp (or the COPY mode lamp for the AL-2050/2060) is lighted for
100msec every time when HSYNC is detected.
[Operation] (AL-2050/2060)
1) Initial display
61-03 LSU CHK
EXECUTING...
[Function]
Used to display the detection level of white plate for shading.
When [OK]/[START] key is pressed, the mirror base unit moves to the white plate for shading
and the copy lamp is lighted.
When the light quantity is stabilized, revision is made for every second, and the level of one
pixel at the center of CCD which is not corrected is detected and the value is displayed in deci-
mal values on the LCD/display. (3 digits)
[Operation] (AL-2050/2060)
1) Initial display
63-01 SHADING CHK
EXECUTING...
AL-2020/2035/2040/2050/2060 SIMULATION, TROUBLE CODES 10 - 30
Details of function/operation
Display item LED
(AL-2050/2060) (AL-2050/2060)
AUTO COPY mode lamp AE mode lamp
MANU PRINT mode lamp TEXT mode lamp
<When ERR>
53-08 SPF AUTO
OK AUTO 100% **
000
Display lamp
Default
(AL-2035/2040)
ERR
1
1