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6. Detailed Function Descriptions
Summary of Each Adjustment
Sub scan line position for YCM
The adjustment of the sub-scan line position for YCM uses the line position for K (color registration). The
machine measures the gaps between the lines of each color in the pattern on the transfer belt. If the gaps
for a color are not correct, the machine moves the image of the color up or down the sub scan axis. To do
this, it changes the laser write timing for that color.
Main scan line position for KYCM
If the machine detects that the image is out of position in the main scan direction, it changes the laser-write-
start timing for each scan line.
Magnification adjustment for KYCM
If the machine detects that magnification adjustment is necessary, it changes the LD clock frequency for the
necessary color.
Skew for YCM
The adjustment of the skew for YCM uses the line position for K.
6
Adjustment Conditions
If SP 2153 1 is set to "1 (ON)", then automatic line position adjustment is done at the times shown below.
After process control is done
If SP 2153 2 is set to "1 (ON)", then the adjustment is done when the following types of process control
are successfully done.
• Initial process control
• Interval process control
• No-use time process control
Initialization
If SP2153 3 is set to "1 (ON)", then the adjustment is done when the main power is turned on or the machine
comes back from the standby mode, but only if one of the following conditions occurs.
• At a set time after the previous adjustment. The default value is 360 minutes. You can adjust the time
with SP 2153 13.
• When the temperature changes after a previous adjustment by more than a set value. The default
value is "5°C ". You can adjust the temperature change value with SP 2153 12.
Printing
If SP 2153 4 is set to "1 (ON)", then the adjustment is done when the machine gets print job data, but only
if one of the following conditions occurs.
• At a set time after the previous adjustment. The default value is 360 minutes. You can adjust the time
with SP 2153 13.
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Table of Contents
Troubleshooting
