Read Sharp AR-M550 (serv.man14) Service Manual online
AR-M550/M620 SETTING AND ADJUSTMENTS 7 - 16
Repeat the above adjustments until an acceptable result is obtained.
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 direction.
• 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.
3) Place a scale on the original table in parallel with the main scan-
ning direction, as illustrated below.
2) Make a normal copy on A4 paper.
3) Measure the lengths of the copied image of the scale and the
actual scale.
4) Determine the image magnification factor using the following for-
mula:
Image magnification factor (%) = Copy dimension/original dimen-
sion x 100
sion x 100
Example: Compare the copy and original dimensions by aligning
the scale’s 10 mm position with the copied image’s 10 mm posi-
tion.
the scale’s 10 mm position with the copied image’s 10 mm posi-
tion.
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.
adjustment is required; otherwise, do the following steps.
5) Go through the modes specified in Simulation 48-1.
ADJ 6
Adjusting the image
magnification
magnification
Item
Set
range
Default
0 TRAY SELECT
Paper feed tray selection
0 - 99
50
1 COPY START
Copy START (Default)
2 MAGNIFICATION Print magnification ratio
3 CCD (MAIN)
SCAN main scanning
magnification ratio
adjustment (CCD)
magnification ratio
adjustment (CCD)
4 CCD (SUB)
SCAN sub scanning
magnification ratio
adjustment (CCD)
magnification ratio
adjustment (CCD)
5 SPF (SUB)
SPF front surface
magnification ratio
adjustment (Sub scan)
magnification ratio
adjustment (Sub scan)
6 CIS (MAIN)
SPF back surface
magnification ratio
adjustment (CIS main scan)
magnification ratio
adjustment (CIS main scan)
7 SPF (MAIN)
SPF front surface
magnification ratio
adjustment (Main scan)
magnification ratio
adjustment (Main scan)
ADJ 6A
Adjust the image magnification in the
main scanning direction in original table
mode (CCD)
main scanning direction in original table
mode (CCD)
10
20
30
40
50
60
70
80
90
100
100
110
120
130
140
10
20
90
100
110
10
20
90
100
110
100mm scale
(Original)
(Original)
Copy image
(1mm (1%)
shorter than
the original)
(1mm (1%)
shorter than
the original)
0.8mm
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