Sharp Mx 2300n Service Manual

MX-2300/2700 N/G  ADJUSTMENTS  6 – 17 4) Check the rough adjustment and the fine adjustment print pat-
tern positions of each color in the front frame and the rear
frame sides.
Use the visually highest color density section as the center,
and measure the shift amount.
The front frame registration and the rear frame registration are
adjusted independently.
To check the image registration, therefore, check the front
frame side and the rear frame side individually.
(If the fine adjustment print pattern is...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 18
 







 
 
 
 
 
 
 
 
 
 



 







 
 
 
 
 
 
 
 
 
 



 







 
 
 
 
 
 
 
 
 
 



 







 
 
 
 
 
 
 
 
 
 



 


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MX-2300/2700 N/G  ADJUSTMENTS  6 – 19 (Example)
NOTE: If either of front or rear adjustment value is changed, the
other adjustment print pattern position may be varied. Be
careful of that.
 10-C Image registration adjustment (Sub scan-
ning direction) (Manual adjustment)
1) Enter SIM50-21 mode.
2) Select the paper feed tray with A4 (11 x 8.5) or A3 (11 x 17)
paper in it by changing the value of set item H.
3) Press [EXECUTE] key.
The sub scanning direction image registration adjustment pat-
tern is...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 20 4) Check the rough adjustment and the fine adjustment print pat-
tern positions of each color.
The visually highest color density section is regarded as the
center, and used as the measurement value.
(If the fine adjustment print pattern is positioned in the range of
0 ± 1 for the fine adjustment reference pattern scale, the
adjustment is not required.)
If the above condition is not satisfied, select the color mode
adjustment item A – C to be adjusted with the scroll...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 21 b) Adjustment value calculation
Add or subtract the shift amount calculated above to or from the current adjustment value, and the result value is used as the new
adjustment value.
Adjustment value = Current adjustment value + Shift amount (correction value)
(When the shift amount (correction value) is plus)
Adjustment value = Current adjustment value – Shift amount (correction value)
(When the shift amount (correction value) is minus)
 
11Scan image distortion...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 22 2) Turn the scanner drive pulley manually and shift the scanner
unit B to bring it into contact with the stopper. When the scan-
ner unit B is in contact with the two stoppers on the front and
the rear frames simultaneously, the parallelism is proper.
If not, perform the following procedures.
3) Loosen the fixing screw of the pulley angle on the front frame
side of the scanner unit.
4) Adjust the position of the pulley angle on the front frame side
of the scanner...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 23 2) Set the test chart prepared in the procedure 1) on the docu-
ment table. (Shift the test chart edge 30mm from the reference
position as shown below.) With the document cover open,
make a copy on A3 (11 x 17) paper.
3) Check for distortion in the sub scanning direction.
If La = Lb, there is no distortion.
If there is any distortion in the sub scanning direction, perform
the following procedures.
4) Loosen either one of the fixing screws of the scanner unit drive...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 24 5) Change the height balance of the scanner rail on the front
frame side.
Remove the lower cabinet of the operation panel. Loosen the
scanner rail fixing screw to change the balance between the
right and the left heights of the scanner rail.
Repeat the procedures 2) – 5) until the difference between the
image distortions (distortion balance) is deleted.
6) Without changing the balance of the scanner rail on the front
frame side, change the overall height.
7) Set the...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 25 If the copy magnification ratio is not satisfactory, perform the
following procedures.
7) Remove the document table glass.
8) Remove the dark box cover.
9) To prevent against shift of the CCD unit optical axis, mark the
CCD unit base as shown below.
* This procedure must be executed also when the CCD unit is
replaced.
10) Loosen the CCD unit fixing screws.
*Never loosen the screws marked with ✕.
If any one of these screws is loosened, the position and the
angle of...

MX-2300/2700 N/G  ADJUSTMENTS  6 – 26
 14-A Scan image magnification ratio adjustment
(Main scanning direction) (Document table
mode)
1) Place a scale on the document table as shown in the figure
below.
2) Enter the simulation 48-1 mode.
3) Make a normal copy and obtain the copy magnification ratio.
Press [CLOSE] key and shift from the simulation mode to the
copy mode and make a copy.
4) Check that the copy magnification ratio is within the specified
range (100 ± 1.0%).
If the copy magnification ratio is...