Read Sharp MX-RP20 Service Manual online
MX-RP
20 N ADJUSTMENTS 4 – 1
MX-RP11
Service Manual
[4] ADJUSTMENTS
1. Image focus adjustment (RSPF front
surface mode)
This adjustment is needed in the following situations:
* The CCD unit has been removed from the machine.
* The CCD unit has been replaced.
* When the copy image focus is not properly adjusted.
* When the copy magnification ratio in the copy image main scan-
ning direction is not properly adjusted.
* U2 trouble has occurred.
1)
Enter the SIM 48-1 mode.
2)
Set the adjustment item CCD (MAIN) to 50 (default value).
Select the adjustment item with the scroll key, and enter the
adjustment value with 10-key and press [OK] key.
adjustment value with 10-key and press [OK] key.
3)
Place a scale on the original table as illustrated below.
4)
Make a normal copy on A4 paper.
Press [CLOSE] key to shift from the simulation mode to the
copy mode, and make a copy.
copy mode, and make a copy.
5)
Compare the copied image of the scale and the actual scale
length in terms of length.
length in terms of length.
6)
Obtain the copy magnification ratio correction ratio in the main
scanning direction from the following formula.
scanning direction from the following formula.
Main scanning direction copy magnification ratio correction
ratio = (Original size - Copy image size) / Original size x 100%
ratio = (Original size - Copy image size) / Original size x 100%
(Example)
Compare the scale of 10mm with the scale of 10mm on the
copy image.
Compare the scale of 10mm with the scale of 10mm on the
copy image.
Main scanning direction copy magnification ratio correction
ratio = (100 - 99) / 100 x 100 = 1
ratio = (100 - 99) / 100 x 100 = 1
If the copy magnification ratio is not satisfactory, perform the
following procedures.
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.
CCD unit base as shown below.
* This procedure must be executed also when the CCD unit is
replaced.
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2.
10
20
90
100
110
10
20
90
100
110
1.0mm
100mm scale
(Orignal)
(Orignal)
Copy image
(1mm (1%)
shorter than
the original)
(1mm (1%)
shorter than
the original)
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