Points To Note When Replacing The Fixing Belt Unit - Canon imagePRESS C850 Series Troubleshooting Manual

Points to note when replacing the fixing belt unit

[Detail]
When the life of the fixing belt unit advances, the greases applied to 27T gear in the fixing drive unit and 31T gear in the fixing
belt unit deteriorate. Also abnormal noise (noise of meshing failure of tooth) during operation or E004-0203 may occur when the
gear is worn out due to the deterioration of the greases.
Clean the deteriorated greases when replacing the fixing belt unit to prevent the above-mentioned issue.
Regarding the operating steps, please refer the following Servicing Work.
- E004-0203 : Protection circuit error
[Service work]
Clean 27T gear [1] and reapply grease by following the step A).
If any damage was observed on teeth of gears, replace the gears by following the step B).
A) Cleaning the gears and reapplying grease
1) Prepare grease SE1107 (FY9-6036-000), the lint-free paper and alcohol for cleaning.
2) Remove the fixing belt unit to get prepared for the work.
3) Wipe out the deteriorated greases which are adherent to the 27T gear with the lint-free paper moistened with alcohol.
[Note] Move the lint-free paper along a tooth trace. When cleaning the gear, rotate it manually and clean all tooth traces.
4) After cleaning, apply 1.3g grease [a] evenly to make sure that the grease covers the entire circumference of the gear.
[Reference] Applying grease is not necessary to the area [a], approximately 10mm between the root of the gear. However, there
is no problem if the grease is applied to this area.
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