Cockling

Assumed cause
  • Cockling (wrinkling) due to paper
  • Cockling (wrinkling) due to paper suction failure in the Paper Feed Belt
  • Cockling (wrinkling) due to paper feed failure

Defect-related parts
  1. Belt Drawer Unit
    Drop in paper suction force due to failure of charging the belt
  2. Anti Static Brush
    Improper static elimination of paper / abnormal static elimination brush load increases paper ovarlap amount
  3. Registration Roller
    Paper wrinkles due to poor paper feed (paper feed side)
  4. EJ Unit
    Paper wrinkles due to poor paper feed (output side)
  5. High Voltage Power Supply Unit
    Failure of applying voltage to charge the Paper Feed Belt
Troubleshooting
Step Confirmation and action YES NO
1

Print the 20104 Black 25% Pattern on non-user paper

  • Has the image defect been improved?

(Due to user paper or separation. Use unopened or conditioned paper)

 End of work Go to step 2
2

Clean the Belt Drawer Unit
Print Ruled Line Pattern.

  • Has the image defect been improved?
 End of work Go to step 3
3

Replace the Belt Drawer Unit
Print Ruled Line Pattern.

  • Has the image defect been improved?
 End of work Go to step 4
4

Replace the Anti Static Brush Unit
Print Ruled Line Pattern.

  • Has the image defect been improved?
 End of work Go to step 5
5

Registration Roller replacement
Print Ruled Line Pattern.

  • Has the image defect been improved?
 End of work

Replace the parts/components to be checked one by one.