Abstract: A fixing unit includes a casing, a heating unit, a second rotary member, a first guide portion, a separation unit, and a separation unit movement mechanism. The separation unit has a separation member and movable relative to the casing between a first position at which the separation unit is positioned when the heating unit is positioned at a position to form a fixing nip portion, and a second position at which the separation unit is positioned when the heating unit is retracted from the position to form the fixing nip portion. The separation unit movement mechanism is configured to move the separation unit from the second position to the first position with the heating unit mounting to the position to form the fixing nip portion.

Abstract: An image forming apparatus includes a motor, a unit including first and second rotatable members, an input gear, a first transmission path, a second transmission path, a rotation detecting portion, and a controller. The a controller executes an operation in an abnormality output mode for outputting abnormality information, wherein if the first rotatable member is not rotated despite rotation of the motor in a first direction, the controller inputs a signal for rotating the motor in a second direction, and (1) if the second rotatable member is not rotated, the controller outputs abnormality information regarding the motor or a drive transmission path for transmitting the driving force from the motor to the input gear, and (2) if the second rotatable member is rotated, the controller outputs abnormality information regarding the unit.

Abstract: An image forming apparatus includes a motor, a unit including first and second rotatable members, an input gear, a first transmission path, a second transmission path, a rotation detecting portion, and a controller. The a controller executes an operation in an abnormality output mode for outputting abnormality information, wherein if the first rotatable member is not rotated despite rotation of the motor in the first direction, the controller inputting a signal for rotating the motor in the second direction, and (1) if the second rotatable member is not rotated, the controller outputs abnormality information on the motor or a drive transmission path for transmitting the driving force from the motor to the input gear, and (2) if the second rotatable member is rotated, the controller outputs abnormality information on the unit.