Ricoh M C250FW, Field Service Manual

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7.Detailed Descriptions
263
MUSIC (Mirror Unit Skew and Interval Correction)
During MUSIC, the line patterns above are made 16 times for fine adjustment or 8 times for the rough
adjustment on the transfer belt. The spaces between the lines (YY, KK, CC, MM, KY, KC, KM) are
measured by the front, center, and rear TM/P sensors. The controller reads the average of the spaces,
and adjusts these items:
•
Sub scan line position for YCM
•
Main scan line position for KYCM
•
Magnification ratio for KYCM
•
Phase control
The ITB cleaning unit cleans the image transfer belt after the patterns are measured.
The execution timing for MUSIC follows the sequence of the process control.