After Executing SP2-111-003

  • Result: "1" in SP2-194-007
  • Result: "2" or "3" (Line pattern detection failure) in SP2-194-010, -011, -012

Test pattern check

Possible cause/Countermeasure

White image, Abnormal image, Low density

  • Defective image processing unit
  • Low density of test pattern
  • Defective BiCU
  1. Replace the high voltage power supply unit.
  2. Do the forced process control (SP3-011-001) or supply some toner (SP3-030-xxx).
  3. 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 SP2-111-003

  • Result: "1" in SP2-194-007
  • One of results: "5" (Out of adjustable range) in SP2-194-010, -011, -012, -013

Test pattern check

Possible cause/Countermeasure

The main scan registrations of M, C, Y, K are shifted by more than ±15.

  • Defective laser unit
  • Defective BiCU
  1. Perform the color skew adjustment (Image Adjustment).
  2. Replace the laser unit.
  3. Replace the BiCU.

The sub scan registrations of M, C, Y, K are shifted by more than ±20.

  • Defective image transfer belt
  • Defective drive units
  • Defective BiCU
  1. Replace the image transfer belt.
  2. Replace the drum motor.
  3. Replace the BiCU.

The main scan registration is shifted by more than ±0.66 mm, 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 skew for M, C, Y, K is more than ±0.75 mm.

  • Defective PCDU
  • Defective laser optics housing unit
  • Defective BiCU
  1. Perform the color skew adjustment (Image Adjustment).
  2. Reinstall or replace the PCDU.
  3. Replace the laser optics housing unit.
  4. Replace the BiCU.

Others

  • Skew correction upper limit error
  • Defective BiCU
  • Defective laser optics housing unit
  1. Perform the color skew adjustment (Image Adjustment).
  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.
  2. Replace the laser optics housing unit.
  3. Replace the BiCU.

The sub scan registrations of M, C, Y are shifted by more than ±1.4mm from the sub scan registration of K.

  • No defective component
  • Defective image transfer belt
  • Defective drive units
  • Defective BiCU
  1. Do SP2-111-003 again.
  2. Replace the image transfer belt.
  3. Replace the drum motor.
  4. Replace the BiCU.

The main scan registration is shifted by more than ±0.66 mm, 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 skew for M, C, Y, K is more than ± 0.75 mm at the end of the scan line?

  • Defective PCDU
  • Defective laser optics housing unit
  • Defective BiCU
  1. Perform the color skew adjustment (Image Adjustment).
  2. Reinstall or replace the PCDU.
  3. Replace the laser optics housing unit.
  4. Replace the BiCU.

Others

  • Skew correction upper limit error
  • Defective BiCU
  • Defective laser optics housing unit
  1. Replace the BiCU.
  2. Perform the color skew adjustment (Image Adjustment).
  3. Replace the laser optics housing unit.

After Executing SP2-111-001

  • Result: "0" in SP2-194-007
  • Result: Color registration errors in SP2-194-010, -011, -012, -013

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 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, K are shifted.

  • Defective laser optics housing unit
  • Defective ID sensor
  • Defective BiCU
  • Incorrect SP value
  1. Perform the color skew adjustment (Image Adjustment).
  2. Replace the laser optics housing unit.
  3. Replace the ID sensor.
  4. Replace the BiCU.
  5. Adjust the value with SP2-182-004 to -021.

The sub scan registrations of M, C, Y, K are shifted.

  • Defective image transfer belt
  • Defective drive units
  • Defective ID sensor
  • Defective BiCU
  • Incorrect SP value
  1. Replace the image transfer belt.
  2. Replace the ID sensor.
  3. Replace the drum motor.
  4. Replace the BiCU.
  5. Adjust the value with SP2-182-022 to -039.

The skew of M, C, Y, K is different.

  • Defective PCDU
  • Defective laser optics housing unit
  • Defective BiCU
  1. Reinstall or replace the PCDU.
  2. Perform the color skew adjustment (Image Adjustment).
  3. Replace the laser optics housing unit.
  4. Replace the BiCU.

The sub scan lines are shifted. Shifted lines appear cyclically.

  • Defective PCDU
  • Defective drive unit
  • Drum phase adjustment error
  1. Reinstall or replace the PCDU.
  2. Check or replace the drive unit.