Sharp MX-M550U Service Manual page 70

6-D Adjust the image magnification in the main
scanning direction in DSPF back-face mode
(CIS)
This adjustment is needed in the following situations:
* 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.
* Images are not correctly magnified in the main scanning direc-
tion.
1) On the DSPF original tray, place such a duplex original as
illustrated below.
10mm
2) Make a normal duplex copy on A4 paper.
3) Measure the lengths of the copied image (on the back side)
and the original image.
original
10 50 100 150 200
4) Determine the image magnification factor using the following
formula:
Image magnification factor (%) = Copy dimension/original
dimension x 100
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.
A4 size
(both sides)
10mm
copy
250
10 50 100 150 200 250
MX-M700N ADJUSTMENTS 6 – 19
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(%)
6) Select the number that corresponds to the adjustment item
CIS (MAIN) using the numeric keypad.
This adjustment item is intended to adjust the image magnifi-
cation in the main scanning direction in DSPF back-face mode
(CIS). (CIS (MAIN))
7) Press the Start key.
8) Adjust the image magnification factor by entering an appropri-
ate value through the numeric keypad.
9) Press the P or Start key. Pressing the Start key starts copy
operation as well as applying the adjustment value.
Repeat the above adjustments until an acceptable result is
obtained.
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.
1
Press [START] key, or press
[SYSTEM SETTINGS] key.
100
2