My TS9020 printer was working perfectly for a few months (including duplex printing), but one time when printing on both sides using the automatic duplexing (which again, was working flawlessly for months), the paper jammed while printing the second side. After clearing the jam following the instructions, the printer continues to jam only when attempting to print the other side using the automatic duplexer. The printer seems to print completely normally when using regular single sided printing.
The printer jams every single time attempting to use the automatic duplexer.
First try cleaning the rear tray and cassette roller. See pg 107 of the maintenance manual.
It's a good place to start, and might solve the issue right away.
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