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Error code: 0x51
CR lock release error.
An error occurred in the carriage operation sequence.
Carriage Assembly Operation Check.
Check that there are no foreign objects in the route of the carriage.
Move the carriage assembly by hand, and check that it moves smoothly.
Make the following adjustments.
Carriage measurement adjustment.
Check the following parts for dirt or damage. Clean or replace them if necessary.
Carriage shaft (also check lubrication).
CR belt (also check its tension).
Printer control board.
Check the following connection status and check the cables for damage.
Connection between the CR motor and the printer relay board.