Troubleshooting Guide
505
Test pattern check Possible cause/Countermeasure
2. Replace the BiCU.
3. Replace the laser optics housing unit.
After Executing SP2-111-003
• Result: "1" in SP2-194-007
• Result: "0" in SP2-194-010, -011, -012, -013
Test pattern check Possible cause/Countermeasure
Do SP2-111-001 or -002.
After Executing SP2-111-001
• Result: "1" in SP2-194-007
• Result: "2" or "3" (Line pattern detection failure) in SP2-194-010, -011, -012, -013
Test pattern check Possible cause/Countermeasure
White image, Abnormal image,
Low density
• Defective laser optics housing unit shutter
• Defective image processing unit
• Low density of test pattern
• Defective BiCU
1. Replace the shutter motor.
2. Replace the high voltage power supply unit.
3. Do the forced process control (SP3-011-001) or supply some toner
(SP3-030-xxx).
4. Replace the BiCU.
Normal image, but with color
registration errors
• Defective ID sensor shutter
• Defective ID sensor
• Defective BiCU
1. Replace the ID sensor shutter solenoid.
2. Replace the ID sensor.
3. Replace the BiCU.
After Executing SP2-111-001
• Result: "1" in SP2-194-007
• Result: "5" (Out of adjustable range) 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 (SP3-030-xxx).
The main scan registrations of M, C, Y, K are shifted by
more than ±1.4.
• No defective component
• Defective laser optics housing unit
• Defective BiCU
1. Do SP2-111-003 again.
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