What are the possible paper jam error messages on the DCP-B7520DW?
The machine can display five paper jam error messages: Document Jam, Jam Rear, Jam 2-sided, Jam Tray, and Jam Inside. Each message indicates where the paper is stuck in your machine, and you can also see these messages in the Brother Status Monitor on your computer. (Page 14)
From the official Brother DCP Series B7520DW All-in-One Printer manual, page 14
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