Test pattern check Possible cause/Countermeasure
The main scan registration of K is
shifted.
• Abnormal SP setting value of main scan: K
Adjust the value with SP2-101-001.
The main scan length of K is shifted. • Abnormal SP setting value of main scan length detection:
K
Adjust the value with SP2-185-001.
After Executing SP2-111-001
• Result: "0" in SP2-194-007
• Result: Color registration errors in SP2-194-010, -011, -012
Test pattern check Possible cause/Countermeasure
Low image density on the output • Low pattern density
Do the forced process control (SP3-011-001) or supply some
toner (SP3-015-xxx).
The main scan registration is shifted, but
only at the central area of the image on
the output.
• Defective ID sensor at center
• Deformed center area on the image transfer belt
• Defective BICU
1. Replace the ID sensor.
2. Replace the image transfer belt.
3. Replace the BICU.
The main scan registrations of M, C, Y
are shifted.
• Defective laser optics housing unit
• Defective ID sensor
• Defective BICU
• Incorrect SP value
1. Replace the laser optics housing unit.
2. Replace the ID sensor.
3. Replace the BICU.
4. Adjust the value with SP2-182-004 to -021.
5. Appendix: Troubleshooting Guide
126
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