Out of line position
correction range
Result of Check
Skew of “M”, “C” and/or “Y” shifts over ±0.75mm
against that of “K”
Causes
1. PCU installation failure
2. Laser Unit failure
3. BCU(IPU) failure
Solution
1. Reset/Replace PCU
2. Replace Laser Unit
3. Replace BCU(IPU)
Pattern -
Result of Check Other
Causes
1. The upper skew correction value is abnormal
2. BCU(IPU) failure
Solution
1. Reset skew correction value (*1)
2. Replace BCU(IPU)
Pattern -
*1
Method for resetting the skew correction value.
1. Turn the power OFF.
2. Remove the harness of the skew correction motor (A second part from the front side) attached to the
laser unit.
3. Turn the power ON, and then execute SP2-110-005 to set the skew correction mechanism to the
origin.
4. Make sure SP2-119-001 to -003 is set to “0”.
5. Turn the power OFF.
6. Connect the harness (A second part from the front side) of the skew correction motor to the laser
unit.
7. Turn the power ON
SP2-111-001 (Forced Line Position Adj.: Mode A) execution (or Color Registration Error Adjustment
via the Maintenance menu)
Result: OK Case: SP2-194-007: 0 (Success)
4. Replacement and Adjustment
430
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