Canon imagePRESS C7000VP Series, Trouble Shooting Information

Page: 72 / 137

Trouble Shooting Information for C7000VP series
Page 72
Rev. 2.0
2010/09/17
3.10
Dirt of pin hole (ring mark)

Symptom
There is a possibility that dirt is attached to the pinhole caused by a fine foreign material that
entered in the developing assembly.

Cause
On rare occasions, a fine foreign material enters into the developing assembly.
Since this material has low resistance, leakage occurs between the drum and sleeve.
As a result, dirt of the pinhole is printed in an image output.

Field Remedy
Replace the developer. If no improvement is seen, replace the developing assembly.
Image sample