Samsung ml-7000 Mode D'Emploi

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Optional Cassette
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Loading the Plain Paper into the Option Cassette
Your printer has an optional cassette that can hold up to 500 sheets of 
papers or 40 envelopes.
To load paper in the optional cassette, proceed as follows.
1. Pull the cassette completely out of the printer.
2. Press down on the bottom plate to lock it into position.
To load the envelope into the cassette, lift the
lever on the left side of the cassette.