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Troubleshooting 
2 Remove any partially fed paper. 
3 Push the cassette back in securely. The printer warms up and 
resumes printing.
Duplex Unit
Paper is jammed in the duplex section. Remove the jammed paper using the procedure given below.
1 Pull out the cassette from the machine.
2 Open the duplex front cover and remove any jammed paper.
Note  Check to see if paper is loaded correctly. If not, reload 
the paper.
IMPORTANT  When pulling out the cassette from the machine, 
ensure that it is supported and does not fall out.