Automatic Line Position Adjustment - Ricoh G-P3 Service Manual

Automatic Line Position Adjustment

Overview
YY, KK, CC, MM: Spaces between two lines of the same color
KY, KC, KM: Spaces between a black line and a color line
During automatic line position adjustment, the line patterns above are made eight times on the transfer belt.
The spaces between the lines (YY, KK, CC, MM, KY, KC, KM) are measured by the left, center, and right
ID sensors. The controller reads the average of the spaces, and adjusts the following items:
• Sub scan line position for YCM
• Main scan line position for KYCM
• Magnification ratio for KYCM
• Skew for YCM (see the note below)
• In this procedure, only the skew for YCM is measured. If you want to adjust it, do the main skew
adjustment procedure. (See 'Replacements and Adjustments – Laser Optics – LD Unit')
The transfer-belt-cleaning unit cleans the transfer belt after the patterns are measured.
Laser Exposure
6
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