Samsung CLX-8640 series Service Manual page 181

If you do not see paper in this area, go to the next step.
3) Insert tray 3 back into the machine until it locks into
place.
4) Open the right bottom door of the dual cassette feeder.
5) Remove the jammed paper by gently pulling it straight
out.
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6) Close the right bottom door.
4. Troubleshooting
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