Adjusting The Image Magnification - Sharp MX-M550U Service Manual

Repeat the above adjustments until an acceptable result is
obtained.
ADJ 6
Adjusting the image
magnification
6-A Adjust the image magnification in the main
scanning direction in original table mode
(CCD)
This adjustment is needed in the following situations:
* The CCD unit has been removed from the machine.
* The CCD unit has been replaced.
* Images are not correctly magnified in the main scanning direc-
tion.
* The MFP control PWB has been replaced.
* The EEPROM on the MFP control PWB has been replaced.
* The scan control PWB has been replaced.
* The EEPROM on the scan control PWB has been replaced.
* U2 trouble has occurred.
1) Place a scale on the original table in parallel with the main
scanning direction, as illustrated below.
5 1 2
A5
B5
A5
A4
8 1 2
B5
B4
11
A4
A3
5 1 2 8 1 2 11 13 14 17
A4
A5 B5 A5 B5 A4 B4 A3
MX-M700N ADJUSTMENTS 6 – 16
2) Make a normal copy on A4 paper.
3) Measure the lengths of the copied image of the scale and the
actual scale.
100mm scale
10
(Original)
Copy image
(1mm (1%) shorter
10
than the original)
4) Determine the image magnification factor using the following
formula:
Image magnification factor (%) = Copy dimension/original
dimension x 100
Example: Compare the copy and original dimensions by align-
ing the scale's 10 mm position with the copied image's 10 mm
position.
Image magnification factor (%) = 99 / 100 x 100 = 99
If the image magnification factor is within the spec (100 0.8%),
no adjustment is required; otherwise, do the following steps.
5) Go through the modes specified in Simulation 48-1.
SIMULATION 48-1
MAGNIFICATION ADJUSTMENT. SELECT 0-7, AND PRESS START.
0.TRAY SELECT 1 1.PRINT START
2.MAGNIFICATION 100
3.CCD(MAIN) 50 4.CCD(SUB)
6.CIS(MAIN) 50 7.SPF(MAIN)
Select other than 0 - 2,
and press [START] key.
SIMULATION 48-1
MAGNIFICATION ADJUSTMENT. INPUT VALUE 0-99, AND PRESS
START.
4.CCD(SUB)
Select 1, and
Press [START] key.
press [START] key.
SIMULATION 48-1
MAGNIFICATION ADJUSTMENT. NOW COPYING.
Select 0, and press [START] key.
SIMULATION 48-1
MAGNIFICATION ADJUSTMENT. SELECT 1-16, AND PRESS START.
(FEED TRAY)
1.TRAY1 2.TRAY2 3.TRAY3 4.TRAY4
5.BPT 6.LCC
(ABOVE+10: DUPLEX MODE)
Select 2, and press
[START] key.
SIMULATION 48-1
MAGNIFICATION ADJUSTMENT.
(MAGNIFICATION)
INPUT 25-400(%)
20 90 100 110
0.8mm
20 90 100 110
50 5.SPF(SUB) 50
50
Press [SYSTEM SETTINGS] key.
50
Press [SYSTEM SETTINGS] key,
or terminate copying.
Press [START] key, or press
[SYSTEM SETTINGS] key.
Press [START] key, or press
[SYSTEM SETTINGS] key.
100
2
1