Sharp MX-4100N Service Manual page 73
Digital full color multifunctional system
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Also See for MX-4100N:
- Operation manual (903 pages) ,
- Quick start manual (120 pages) ,
- Software setup manual (44 pages)
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12-B
DSPF mode image focus adjustment
This adjustment is required in the following cases:
* When the DSPF CCD unit is replaced.
* When the DSPF CCD unit is replaced.
* When the COPY/SCAN/FAX image focus is not properly
adjusted.
* When the DSPF unit is removed.
* When the DSPF unit is replaced.
1)
Make a duplex copy in DSPF mode.
2)
Make sure that the copied image on the back side of the paper
is satisfactorily focused.
If the image is not satisfactorily focused, do the following
steps.
3)
Open the door. Remove the screws, and remove the transport
PG upper.
4)
To prevent against shift of the CCD unit optical axis, mark the
CCD unit base as shown below.
5)
Loosen the CCD unit fixing screws (4 pcs.).
* Never loosen the screws marked with
Loosening these screws could possibly change the CCD
unit base optical axis.
changed, it cannot be corrected through on-site adjust-
ments. Solving such a problem requires the replacement of
the entire scanner unit.
.
Once the optical axis has been
MX-5001N ADJUSTMENTS 5 – 31
6)
Slide the CCD unit in the arrow direction (CCD sub scanning
direction) to change the installing position.
When the copy image is longer than the original scale, shift the
CCD unit in the direction B. When the copy image is shorter
than the original scale, shift the CCD unit in the direction A.
One scale of mark-off line corresponds to 0.2%.
At that time, fix the CCD unit so that it is in parallel with the
scale on the front and the rear side of the CCD unit base.
* Fix the CCD unit so that it is in parallel with the line marked
in procedure 4).
7)
Make a copy and check the copy magnification ratio again.
If the copy magnification ratio is not in the range of 100 ± 1%,
repeat the procedures of 4) – 6) until the condition is satisfied.
NOTE: By changing the CCD unit fixing position with the simula-
tion 48-1 adjustment value at 50, the copy magnification
ratio is adjusted within the specified range (100 ± 1.0%)
and the specified resolution is obtained based on the opti-
cal system structure.
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