Sharp AR-M256 Service Manual page 40

1) Put a scale on the original table as shown below, and make a nor-
mal (100%) copy to make a test chart.
Note: Since the printed copy is used as a test chart, put the scale in
parallel with the front side edge of the glass.
2) Set the test chart on the RSPF and make a normal (100%) copy.
3) Compare the scale image and the actual image.
If necessary, perform the following adjustment procedures.
4) Execute SIM 48-1-3.
5) After warm-up, shading is performed.
The current front surface sub scanning direction magnification ratio
correction value is displayed in two digits on the display section.
6) Enter the set value and press the start key.
The set value is stored and a copy is made.
7) Execute SIM 48-1-4.
The current back surface sub scanning direction magnification ratio
is displayed in two digits on the display section.
8) Enter the set value and press the start key.
The set value is stored and a copy is made.
<Adjustment specification>
Spec
Adjustment mode
value
Sub scanning At normal:
direction ±1.0%
magnification ratio
(RSPF mode)
(11) Off center adjustment (RSPF mode)
Note: Before performing this adjustment, be sure to check that the
paper off center is properly adjusted.
1) Place the center position adjustment test chart (sheet with a
straight line in the scan direction at the center) on the RSPF.
2) Make a normal copy from the manual paper feed tray, and check
the printed copy with the test chart.
If any adjustment is required, perform the following procedure.
3) Execute SIM 50-12.
4) After warm-up, shading is performed and the current set value of
the off center adjustment is displayed on the display section in 2
digits.
5) Enter the set value and press the start key.
The set value is stored and a copy is made.
<Adjustment specification>
Adjustment
Spec value
mode
Original off Single: Center
center mode ± 3.0mm
(RSPF
Duplex: Center
mode)
±3.5mm
AR-M256/M257/M258/M316/M317/M318/5625/5631 ADJUSTMENTS, SETTING 7 - 8
Setting
SIM Set value
range
48-1-3 Add 1: 1 – 99
48-1-4 0.05% increase
Reduce 1:
0.05% decrease
Setting
SIM Set value
range
50-12 Add 1: 0.1mm 1 – 99
shift to R side
Reduce 1: 0.1mm
shift to L side
(12) OC (RSPF) open/close detection position adjustment
1) Execute SIM 41-3.
2) Gradually close the OC (RSPF) from the full open position, and
measure distance A when the display on the operation panel
changes. (See the figure below.)
Distance A = Table glass top - OC (RSPF) handle rib
<Adjustment specification>
OC (SPF) open/close position A: 125 – 225mm
3) If the distance is outside the specified range, adjust the open/close
sensor attachment plate position as shown below.
･ Distance < 125mm: Shift toward A.
･ Distance > 225mm: Shift toward B.
(13) Original sensor adjustment (SIM 41-2, 41-4)
1) Set A3 (11" x 17") paper on the OC table.
(Keep the SPF (OC cover) open.)
2) Execute SIM 41-2.
3) Keep A=125mm, and execute SIM 41-4. (Do not put paper on the
table.)
4) Check the reaction with SIM 41-1.
A
A
B