Ricoh MP C2504 Field Service Manual page 669

4. Replacement and Adjustment
Out of line position
correction range
*1 Method for resetting the skew correction value.
1. Turn the power OFF.
2. Remove the left cover (page 408)
3. Remove the harness of the laser optics positioning motor attached to the laser unit (15-pin).
660
Skew of "M", "C", and/or "Y" shifts over ±0.75mm
Result of Check
against that of "K"
1. PCU installation failure
Causes 2. Laser Unit failure
3. BCU(IPU) failure
1. Reset/Replace PCU
Solution 2. Replace laser unit
3. Replace BCU(IPU)
Pattern -
Result of Check Other
1. The upper skew correction value is abnormal
Causes
2. BCU(IPU) failure
1. Reset skew correction value (*1)
Solution
2. Replace BCU(IPU)
Pattern -