Samsung SL-X7600GX Service Manual page 71

■ Adjustment
•
Sub Scan Line Position for CMY
The adjustment of the sub-scan line position for CMY is based on the line position for K. The machine measures the gaps
between the lines of each color in the pattern on the transfer belt. When 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 CMY
When 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 CMY
When the machine detects that magnification adjustment is necessary, it changes the LD clock frequency for the
required color.
•
Skew for CMY
The adjustment of the skew for CMY is based on the line position for K.
■ Adjustment Conditions
Line position adjustment can be turned on or off. However, it is normally recommended to turn on this function.
Line position adjustment timing depends on several settings. These settings include the following :
•
ΔT = Temperature change of LSU (Laser Scanning Unit) between the temperature of the previous line position
adjustment and the current temperature.
•
Pages = Total printed pages after previous line position adjustment.
Interval During Print Job :
Line position adjustment interrupts printing and then starts automatically when one of these conditions occurs when the
machine checks at the sheet interval.
1) ΔT > Temperature threshold (LSU temperature: [default: 3°C])
2) Pages > Output threshold for all outputs (default: 500 pages)
Waste Toner Container Not-Installed / Installed :
1) Line position adjustment starts automatically when waste toner container is removed and reinstalled.
Drum Unit or Developer Unit replaced :
1) When the machine detects a new drum unit or developer unit, line position adjustment is automatically performed.
ITB replaced :
1) When the machine detects a new ITB or other ITB, SVC engineer have to execute the adjustment manually.
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2. Product Specifications and Description
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