Samsung Xpress M288 Series Service Manual page 30

2. Product spec and feature
3) Registration roller
It is used as an anti skew device, and to setup proper registration timing with that of the toned image on the drum. It also is
used for jam detection to ensure paper has left the paper tray.
4) MP (Multi-Purpose) Tray
The multi-purpose tray can hold special sizes and types of print material, such as postcards, note cards, and envelopes.
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