Spf (Rspf) Scan Position Automatic Adjustment; Ratio Adjustment - Sharp AR-168S Service Manual

5. SPF (RSPF) scan position automatic
adjustment
Place a black chart so that it covers the SPF scan glass and the OC
glass together, and close the OC cover.
When test command 53-08 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 scan is not per-
formed 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 scan position with the adjustment value
displayed. The SPF glass cover edge position is calculated from the
difference between the SPFG glass cover edge and the OC side
document glass CCD output level. If the adjustment is normal, the
adjusted value is displayed. 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 scan position auto
adjustment
SPF scan position manual
adjustment
Operation
The operation is similar to test command 46-01. (In MANUAL)
OK/ERR display in AUTO
<When OK>
53-08 SPF AUTO
AUTO 100% ** OK
* Use a black chart (UKOG-0011QSZZ) or prepare a chart as shown
below.
Chart size: 300 x 100, prepared with cutting sheet No. 791 (Black) or
an equivalent one.
Reason: To prevent erroneous detection by disturbing light of a
fluorescent lamp, etc.
Display
Default LED
item
AUTO 1 COPY mode lamp
MANU 1 PRINT mode lamp
<When ERR>
53-08 SPF AUTO
AUTO 100% ** ERR
6cm or more is required.
AR-168S/168D ADJUSTMENTS 9 - 7
The size of the black chart (UKOG-0011QSZZ) is 297 x 420. Divide it
into four for use.
6. RSPF (SPF) mode sub scanning direction
magnification ratio adjustment
Note: Before performing this adjustment, be sure to check that the OC
mode adjustment in copying has been completed.
1) Put a scale on the original table as shown below, and make a
normal copy (100%) on the front and the back surfaces to make a
test chart.
Note: Since the printed copy is used as a test chart, put the scale in
paralled with the edge lines.
2) Set the test chart on the RSPF and make a duplex copy (D-D or D-
S) in the normal ratio (100%).
3) Compare the scale image and the actual image.
If necessary, perform the following adjustment procedures.
4) Execute TC 48-05.
5) The current front surface sub scanning direction magnification ratio
correction value is displayed in two digits on the display section.
To select SIDE1 and SIDE2, use [ / ] keys.
6) Enter the set value and press the start key.
When adjusting the RSPF, use [2-SIDED COPY] key to select
single/duplex after entering the one page print mode, performing 2-
page single copy.
Mode
Sub scan magnification ratio
adjustment on the surface of SPF/
RSPF document
Sub scan magnification ratio
adjustment on the surface of
RSPF document
* When there is no document in SPF, copy is inhibited.
<Adjustment specification>
Adjustment
Spec value
mode
Sub scanning At normal:
direction ±1.0%
magnification
ratio (SPF/RSPF
mode)
Display
Default LED
item
SIDE1 50 COPY
mode lamp
SIDE2 50 PRINT
mode lamp
Setting
TC Set value
range
48-5 Add 1: 1 – 99
0.1% increase
Reduce 1: 0.1%
decrease