Vertical Magnification Adjustment - Ricoh C231 Service Manual

COPY IMAGE ADJUSTMENT

6.2.3 VERTICAL MAGNIFICATION ADJUSTMENT

PURPOSE: To adjust the vertical magnification to within the adjustment standard
by changing the scanning speeds in platen and ADF modes.
ADJUSTMENT STANDARD:
Within 100 1.0%
CAUTION: This adjustment is required every time the MPU has been replaced.
1. Turn on the main switch, and make a copy in platen mode.
NOTE: The image position on the trial print that is automatically made after
making a master tends to be inconstant. Do not use the trial print to
check the copy image.
2. Measure the difference between the magnification of the original and the print.
If the vertical magnification does not meet specifications, go to the next step.
3. Access SP30 (Sub-Scan Magnification Adjustment).
4. Adjust the value.
5. Exit the SP mode and make a copy.
6. Check the vertical magnification again to ensure it is within specifications. If the
vertical magnification meets specifications, go to the next step.
7. Make a copy in ADF mode and repeat the same steps using SP 36 (ADF
Magnification Adjustment).
C231/C237/C238
6-8
SM