MX-RP20. Service Manual for RP20N. - Sharp Copying Equipment Service Manual (repair manual). Page 10

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MX-RP
20 N  ADJUSTMENTS  4 – 5
4)
Enter the SIM 50-12.
SIM50-12
A - C: When the adjustment value is increased, the image
position is shifted to the rear frame side.
1step = 0.1mm
* Item A, B: When the adjustment value is increased, the scan
timing is delayed.
* Item C - H: When the adjustment value is increased, the
image loss is increased.
* Item A - H: 1 step = 0.1mm change
5)
Select an adjustment mode with the scroll key.
(SIM50-12)
6)
Enter an adjustment value with 10-key, and press [OK] key.
(Change for change in the adjustment value: 0.1mm/step)
(When the adjustment value is increased, the print image is
shifted to the rear.) Repeat the procedures of 2) - 6) until a sat-
isfactory result is obtained.
NOTE: When [CLOSE] key is pressed in this simulation mode, the
machine goes into the normal operation mode. Under this
state, copy check can be normally performed. When the
system key is pressed, the machine returns to the simula-
tion mode.
5. Copy mode image loss adjustment
(RSPF mode)
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 the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When U2 trouble occurs.
* When the RSPF section is disassembled.
* When the RSPF unit is replaced.
NOTE: To execute this adjustment, the following items must have
been properly adjusted.
Adjustment procedures
1)
Prepare the adjustment chart.
The adjustment chart can be made by the following proce-
dures. Use A4 (11" x 8.5") paper and draw arrow marks verti-
cally and horizontally on the front and the back surfaces. At the
same time, put marks of the lead edge, the trail edge, the front
end, and the rear end as well as the identification marks of the
front surface and the back surface.
Item
Display
Content
Setting 
range
Default 
value
A
OC
Document table image off-
center adjustment
1 - 99
50
B
SPF(SIDE1)
SPF front surface image off-
center adjustment
1 - 99
50
C
SPF(SIDE2)
SPF back surface image off-
center adjustment
1 - 99
50
SPF(SIDE1)
Front surface mode
SPF(SIDE2)
Back surface mode
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2.
ADJ 3C
Print engine print area (void area) adjustment
ADJ 7C
Main scanning direction image magnification ratio 
adjustment (RSPF mode)
ADJ 7D
Sub scanning direction image magnification ratio 
adjustment (RSPF mode)
ADJ 8B
Scan image off-center adjustment (RSPF mode)
ADJ 10B
Document scan position adjustment (RSPF mode 
scanner scan position adjustment)
F
L
R
FACE
BACK
R
T
F
L
T
Front surface
Back surface
Draw arrows.
Draw arrows.
Put the position 
marks.
Put the position 
marks.
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