MX-6240N, MX-7040N (serv.man24). Section 5 Adjustments and Settings - Updated November 2012 - Sharp Copying Equipment Service Manual (repair manual). Page 85

MX-7040N  ADJUSTMENTS AND SETTINGS  5 – 85

3)

Make a normal copy and obtain the copy magnification ratio.

Press [CLOSE] key to 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 within the specified range (100
 1.0%), the adjustment is completed. If the copy magnification
ratio is not within the specified range, perform the following
procedure.

5)

Change the CCD (MAIN) adjustment value of Simulation 48-1.

When the adjustment value is increased, the copy magnifica-
tion ratio is increased.

When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.02%.

Repeat the procedures 3) - 5) until the copy magnification ratio
is within the specified range (100 

 1.0%).

 

This adjustment must be performed in the following cases:

* When the copy magnification ratio in the copy image sub scan-

ning direction is not properly adjusted.

* When the scanner motor is replaced.

* U2 trouble has occurred.

* When the scanner control PWB is replaced.

* When the EEPROM of the scanner control PWB is replaced.

1)

Place a scale on the document table as shown in the figure
below.

2)

Enter the SIM 48-1 mode.

3)

Make a normal copy and obtain the copy magnification ratio.

Go 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 within the specified range (100
 1.0%), the adjustment is completed. If the copy magnification
ratio is not within the specified range, perform the following
procedure.

5)

Change the CCD (SUB) adjustment value of Simulation 48-1.

When the adjustment value is increased, the copy magnifica-
tion ratio in the sub scanning direction is increased.

When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.1%.

Repeat the procedures 3) - 5) until the copy magnification ratio is
within the specified range (100 

 1.0%).

 

This adjustment must be performed in the following cases:

* When the scan control PWB is replaced.

* When the EEPROM on the scan control PWB is replaced.

* When U2 trouble occurs.

* When the copy magnification ratio of the DSPF mode copy

image in the main scanning direction is not proper.

* When the DSPF is disassembled.

1)

Place the duplex adjustment chart shown below on the docu-
ment tray of the DSPF.

The adjustment chart is prepared by the following procedures.

Use A4 (11" x 8.5") paper, and put marks on both sides and
both surfaces of the paper at 10mm from each edge.

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10

20

90

100

110

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20

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100

110

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20

90

100

110

(Example 1)
Copy A
(Shorter than
the original)

(Example 2)
Copy B
(Longer than
the original)

Scale
(Original)

Copy magnifi-
cation ratio

(Original dimension - Copy dimension)

Original dimension

100%

A4 size

(Both the front surface

and the back surface)

10mm

10mm

Paper pass direction