Error code Category Contents of error Solution B140 Fax board soft error MSG I/F error with JC Turn OFF and ON the main power switch.Use the latest FW.Acquire the data saved in the storage from [Service Mode] -> [Debug Settings] -> [Debug Log Output]. B141 Fax soft error (received unexpected command) B142 Fax soft error (received undefined command) B143 Fax soft error (command frame length error) B144 Fax soft error (parameter length error) B145 Fax soft error (received undefined parameter) B146 Fax soft error (command/response sequence error) B147 Fax board error IC initialization error (IC failure) Replace the fax board.
(Link to the Field Service Manual)