Magnification Adjustment - Minolta Di551 Service Manual

[9] Magnification Adjustment

Adjusting the printer and copy vertical and horizontal
magnifications.
1. Select " Image adjustment" in the Adjust-
2
ment mode menu Screen to display the Image
adjustment mode menu Screen.
2. Press " Magnification adjustment" in the
2
Image adjustment mode menu Screen to display
the Magnification adjustment mode menu
Screen.
3. Magnification adjustment consists of the follow-
ing:
Printer drum clock adjustment
1
Printer horizontal adjustment
2
Scanner drum clock adjustment
3
RADF drum clock adjustment
4
4. Press the number key corresponding to the item
to be adjusted.
5. After adjustment completes, return to the Mag-
nification adjustment menu Screen.
6. Press the
RETURN
adjustment menu Screen to return to the Image
adjustment mode menu Screen.
Caution: Check and adjust the printer vertical
magnification adjustment during
maintenance. Also adjust the printer
restart timing because it changes with
the printer vertical magnification
adjustment
key on the Magnification
2-59
1. Printer drum clock magnification adjust-
ment
Adjusting the printer vertical magnification.
Step Operation
Enter the 36 mode.
1
[Adjustment mode menu Screen]
2
Press " Image adjustment".
2
[Image adjustment mode menu Screen]
3
Select " Magnification adjustment".
2
[Magnification adjustment mode menu
Screen]
4
Press " Printer drum clock adjust-
1
ment".
[Printer drum clock adjustment Screen]
5
Press the
COPY SCREEN
Select A3 size paper and press the START
6
button to output the test pattern (No.16).
Measure the vertical magnification with a
ruler.
Specification:
± 0.5 % or less (100 % magnification)
Within ± 1mm with respect to 206 mm.
7
If the specification is not satisfied, press the
8
C button while pressing the Utility button.
[Printer drum clock adjustment Screen]
Enter a value using the numeric keys and
9
press the
SET
Setting range: -27 to +100
1 step = 0.05 %
Repeat steps 5 to 9 until the specification is
10
satisfied.
Press the
RETURN
11
Magnification adjustment mode menu
Screen.
ADJUSTMENT
key.
206 1
key.
key to return to the