Samsung MultiXpress M537x series Service Manual page 261

4. Troubleshooting
d) Check if any of the teeth on gear (SJ10 3308) are broken. Replace the gear if necessary.
e) Check if the Front Jogger shaft (JR10 3304) is contaminated. Clean as is necessary.
4) Replace the Rear Jogger Unit(JC81-03507C).
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