MX-RP19. Service Manual for RP19N. - Sharp Copying Equipment Service Manual (repair manual). Page 6

MX-RP19 N  ADJUSTMENTS  4 – 1

MX-RP19 N

Service Manual

 

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.

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.

5) Compare the copied image of the scale and the actual scale

length in terms of length.

6)

Obtain the copy magnification ratio correction ratio in the main
scanning direction from the following formula.
Main  scanning  direction  copy  magnification  ratio  correction
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.
Main  scanning  direction  copy  magnification  ratio  correction
ratio = (100 - 99) / 100 x 100 = 1

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.

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10

20

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100

110

10

20

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100

110

1.0mm

100mm scale
(Orignal)

Copy image 
(1mm (1%) 
shorter than 
the original)