Read Sharp MX-M364N / MX-565N (serv.man4) Service Manual online
MX-M565N ADJUSTMENTS AND SETTINGS 4 – 18
6-B
Image focus adjustment (DSPF back
surface mode)
surface mode)
This adjustment is required in the following cases:
* 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.
is satisfactorily focused.
If the image is not satisfactorily focused, do the following
steps.
steps.
3)
Open the door. Remove the screws and transport PG upper.
4)
To prevent against shift of the CCD unit optical axis, mark the
CCD unit base as shown below.
CCD unit base as shown below.
5)
Loosen the CCD unit fixing screws.
* Never loosen the screws marked with 5.
Loosening these screws could possibly change the CCD
unit base optical axis. Once the optical axis has been
changed, it cannot be corrected through on-site adjust-
ments. Solving such a problem requires the replacement of
the entire scanner unit.
unit base optical axis. Once the optical axis has been
changed, it cannot be corrected through on-site adjust-
ments. Solving such a problem requires the replacement of
the entire scanner unit.
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.
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 +/-
0.8%, repeat the procedures of 4) - 6) until the condition is sat-
isfied.
0.8%, repeat the procedures of 4) - 6) until the condition is sat-
isfied.
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 +/- 0.8%)
and the specified resolution is obtained based on the opti-
cal system structure.
ratio is adjusted within the specified range (100 +/- 0.8%)
and the specified resolution is obtained based on the opti-
cal system structure.
ADJ 7
Scan image magnification ratio
adjustment
(Manual adjustment)
adjustment
(Manual adjustment)
This manual adjustment is used when the automatic adjustment of
SIM 50-28 cannot obtain a satisfactory result.
SIM 50-28 cannot obtain a satisfactory result.
This adjustment is needed in the following situations:
* When the copy image magnification ratio in the sub scanning
direction is not properly adjusted.
* When the scanner motor is replaced.
* When a U2 trouble occurs.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
Before this adjustment, the focus adjustment (CCD unit installing
position adjustment) must have been completed.
position adjustment) must have been completed.
A
B
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