Canon imagePRESS C10000VPSeries, Troubleshooting Manual

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Streaks and stains on image in feeding direction due to breakage
of the tension spring
[Symptom/Question]
Streaks and stains on image in feeding direction may occur. When checking the collection roller upon the issue occurrence, the
location of the soiled areas [a] is found to match between the streaks and stains on the image and the collection roller [1]. The
arrow indicates the paper feeding direction.
[Cause]
As the life of the tension spring [1] of the web roller in the fixing web unit advances, the tension spring may break. When the web
roller is pressed against the collection roller with less force due to the tension spring breakage, cleaning capability decreases.
As a result, the collection roller is soiled gradually and it results in the above symptom.
[Remedy/Answer]
When the above symptom occurs, prepare the new tension spring (FU2-1836-000) and replace it by following the steps below.
For every web roller, there are 2 tension springs located, one each in the front [A] and the back [B]. Even when only one of them
breaks, be sure to replace both at once.
1) Refer to Service Manual > 4. Parts Replacement and Cleaning > Fixing System > "Replacing the Secondary Fixing Web Unit"
and remove the fixing web unit.
2) Remove the 2 retaining rings [1] and the 2 bushings [2] with fingers from the [A] and [B] sides of the fixing web unit. After
replacing the tension spring, the removed retaining rings and the bushings will be reused.
3) Remove the 2 tension springs [1] with fingers from the [A] and [B] sides.
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