Xerox WorkCentre 7220

If any elements contained in the Cleaner-Roll attach to the BCR surface at the BCR-to-Cleaner-Roll Nip area, the resistance on the BCR may lower, causing white streaks to appear in the FS direction.

Sometimes a discharge element attaches to the photoreceptor at the BCR nip area, causing white streaks to appear at intervals of Photoreceptor Pitch.

This problem may occur in a machine that has had a long rest or at the first operation of the day. (Halftone Image)

Initial Actions

Make approx. 10 to 30 prints using dC612. If the streaks do not disappear, perform the procedure.

Procedure

NOTE: If the problem occurs with the Y, M, or C Drum, print Full Color images. If it occurs with the K Drum, print either Full Color or Black and White images.

Change NVM location 751-327 (Recovery from Deletion Mode SW) to 1. (Default is “0.”)

When 1 is selected and all the following conditions are met, the recovery sequence is initiated. The following NVM locations can be adjusted according to the installation environment and/or the situation where the problem occurred.

• Environment Condition
  The temperature inside the machine is higher than [Deletion Set Temp Threshold] (751-328) and the humidity inside it is higher than [Deletion Set Humidity Threshold] (751-329). If you want to exclude the environment condition, set the minimum value.
• Image Area Coverage Condition
  Deletion Average A/C of each color (751-331 to 334) is higher than Deletion A/C Threshold (751-330). If you want to exclude the Image Area Coverage condition, set the minimum value.
• Job Rest Condition
  The Rest Time is longer than the Rest Time Threshold (751-335=100 min.). If you want to exclude the Rest condition, set the minimum value.

A length of Idling Operation Time can be adjusted by use of Recovery from Deletion Mode: Length (751-338=9,425mm). The default (recommended) enables the parts to rotate for approx. one minute. The maximum value (30,160mm) enables them to rotate for approx. 4 minutes.