C. Image Density (Exposure) Adjustment - Sharp AR-M256 Service Manual

(14) RSPF white correction pixel position adjustment
(required in an RSPF model when replacing the lens
unit) (SIM63-7)
1) Fully open the RSPF.
2) Execute SIM 63-7.
3) When the operation panel displays "COMPLETE," the adjustment
is completed.
4) If the operation panel displays "ERROR," perform the following
measures.
• When the display is 0:
Check that the SPF is open.
Check that the lamp is ON. (If the lamp is OFF, check the MCU con-
nector.)
Check that the CCD harness is properly inserted into the MCU con-
nector.
• When the display is 281 or above:
1) Remove the table glass.
2) Remove the dark box.
3) Slide the lens unit toward the front side and attach it, then exe-
cute SIM.
• When the display is 143 or below:
1) Remove the table glass.
2) Remove the dark box.
3) Slide the lens unit toward the rear side and attach it, then execute
SIM.
F
∗
When the lens unit is moved, execute the OC main scanning magni-
fication ratio auto adjustment, SIM 48-1-1.
∗
This adjustment is basically O.K. with SIM 63-7.
(15) RSPF scan position auto adjustment
[Function]
Used to adjust the RSPF scan position automatically.
[Operation]
1) With the RSPF or the OC cover open, place a chart of black back-
ground on the OC glass. (In the RSPF standard model, the RSPF
glass surface is included.)
∗
Use a black chart (UKOG-0011QSZZ) or prepare a chart as shown
below.
Chart size: 310 x 470, prepared with cutting sheet No. 791 (Black) or
an equivalent one.
Reason: To prevent erroneous detection by disturbing light of a
fluorescent lamp, etc.
2) Enter SIM53-08, and press [START] button.
Outline of SIM: The optical unit is shifted to recognize the bound-
ary between the OC glass and the RSPF glass cover.
With the same position as the reference, the RSPF scan position is
automatically adjusted.
<Note>
• After completion of the RSPF scan position auto adjustment, the
RSPF lead edge adjustment must be executed. (Both surfaces)
• There must be no other sheet than the black chart on the glass sur-
face.
• Especially when in RSPF scan, the center area is scanned in the
main scan direction. Be careful to prevent external light from enter-
ing the scan area.
AR-M256/M257/M258/M316/M317/M318/5625/5631 ADJUSTMENTS, SETTING 7 - 9
3) Check that the lead edge is not shifted. (Both surfaces)
4) Change the adjustment value of the RSPF scan end position.
5) Change the initial value of the RSPF exposure adjustment (SIM46-
R

C. Image density (exposure) adjustment

(1) Copy mode (SIM46-2)
1) Set a test chart (UKOG-0162FCZZ) on the OC table as shown
2) Place three or more sheets of A3 (11" x 17") paper on the test
3) Execute SIM 46-2.
4) After warm-up, shading is performed and the current set value of
5) Change the set value with the [10-key] to adjust the copy image
6) Make a copy and check that the specification below is satisfied.
Note: Place originals in the rear reference, and the test chart in the
(If the original lead edge adjustment has been made properly, even
when the scan position is shifted, it is followed automatically.)
For the RSPF standard-provision
Place only the black
machine, check that the black
chart on the OC glass.
chart covers the SPF glass.
(Change the adjustment value of SIM50-6-3 from 50 to 36.)
Change the number of steps for Pin off – scan end position from
1,014 to 986.
Be sure to execute this adjustment because an image may be cut
off during FAX transmission though copying is normally performed.
20) from 50 to 53.
(For the CCD exposure adjustment with RSPF, use the value of the
OC adjustment value +3.)
There are suffixes of –1 SPF and –2 RSPF. Change each of them.
below.
chart.
the density (exposure) level is displayed on the display section in 2
digits.
For mode selection, use the [10-key].
density.
front reference when adjusting the exposure.
Placing the black chart
The black chart must cover
this area.
Rear
Front