Abstract: An image forming system comprises a first housing, a second housing and a third housing. The second housing may comprise a motor, a first door and a first switch. The first switch is provided on an electrical path connecting a power supply and the motor, for switching between a first state and a second state and for switching from the first state to the second state. The third housing may comprise a load. When the first door is opened in a state where the first switch is in the first state, the first switch switches from the first state to the second state to cause supply of electric power to the load to be cut off.

Abstract: An image forming apparatus, to which a replaceable unit with a nonvolatile memory is mounted, including: a storage portion configured to store data related to the replaceable unit read from the memory and hold stored contents even when the image forming apparatus is not activated; a door to be opened when the replaceable unit is replaced; a detector configured to detect whether the door is open or closed; a latch circuit configured to hold a specific state when the detector detects that the door is open when the image forming apparatus is not activated; and a controller configured to, when activating the image forming apparatus, read the data from the memory when the latch circuit is in the specific state, read the data from the storage portion when the latch circuit is not in the specific state, and perform an activation process based on the read data.

Abstract: An image forming apparatus, to which a replaceable unit with a nonvolatile memory is mounted, including: a storage portion configured to store data related to the replaceable unit read from the memory and hold stored contents even when the image forming apparatus is not activated; a door to be opened when the replaceable unit is replaced; a detector configured to detect whether the door is open or closed; a latch circuit configured to hold a specific state when the detector detects that the door is open when the image forming apparatus is not activated; and a controller configured to, when activating the image forming apparatus, read the data from the memory when the latch circuit is in the specific state, read the data from the storage portion when the latch circuit is not in the specific state, and perform an activation process based on the read data.

Abstract: An image forming apparatus, to which a replaceable unit with a nonvolatile memory is mounted, including: a storage portion configured to store data related to the replaceable unit read from the memory and hold stored contents even when the image forming apparatus is not activated; a door to be opened when the replaceable unit is replaced; a detector configured to detect whether the door is open or closed; a latch circuit configured to hold a specific state when the detector detects that the door is open when the image forming apparatus is not activated; and a controller configured to, when activating the image forming apparatus, read the data from the memory when the latch circuit is in the specific state, read the data from the storage portion when the latch circuit is not in the specific state, and perform an activation process based on the read data.

Abstract: An image forming system comprises a first housing, a second housing and a third housing. The second housing may comprise a motor, a first door and a first switch. The first switch is provided on an electrical path connecting a power supply and the motor, for switching between a first state and a second state and for switching from the first state to the second state. The third housing may comprise a load. When the first door is opened in a state where the first switch is in the first state, the first switch switches from the first state to the second state to cause supply of electric power to the load to be cut off.

Abstract: An image forming apparatus, to which a replaceable unit with a nonvolatile memory is mounted, including: a storage portion configured to store data related to the replaceable unit read from the memory and hold stored contents even when the image forming apparatus is not activated; a door to be opened when the replaceable unit is replaced; a detector configured to detect whether the door is open or closed; a latch circuit configured to hold a specific state when the detector detects that the door is open when the image forming apparatus is not activated; and a controller configured to, when activating the image forming apparatus, read the data from the memory when the latch circuit is in the specific state, read the data from the storage portion when the latch circuit is not in the specific state, and perform an activation process based on the read data.

Abstract: During a period of a low power state, an image forming apparatus causes a system controller to stop an operation of a second power source and cut off voltage supply from a first power source to each of a power relay, an AC voltage detector, a fixing controller, and a printer controller. At a time of return from the low power state, the system controller starts the power supply from the first power source to each of the power relay, the AC voltage detector, the fixing controller, and the printer controller, and then activates the second power source.

Abstract: Provided is an image forming apparatus including: an image forming unit configured to form an image on a recording material; an exhaust fan configured to exhaust air inside the image forming apparatus; a CPU configured to control rotation of the exhaust fan; and a memory configured to store in advance a first control setting value for rotating the exhaust fan at a first target rotation speed. The CPU rotates the exhaust fan based on the first control setting value, and permits the image forming unit to form an image when a rotation speed of the exhaust fan becomes equal to or faster than a lower limit rotation speed for suppressing a discharge amount of UFPs. When a predetermined time period has elapsed, the CPU performs feedback control for the exhaust fan such that the exhaust fan is rotated faster than the first target rotation speed.

Abstract: During a period of a low power state, an image forming apparatus causes a system controller to stop an operation of a second power source and cut off voltage supply from a first power source to each of a power relay, an AC voltage detector, a fixing controller, and a printer controller. At a time of return from the low power state, the system controller starts the power supply from the first power source to each of the power relay, the AC voltage detector, the fixing controller, and the printer controller, and then activates the second power source.

Abstract: Provided is an image forming apparatus including: an image forming unit configured to form an image on a recording material; an exhaust fan configured to exhaust air inside the image forming apparatus; a CPU configured to control rotation of the exhaust fan; and a memory configured to store in advance a first control setting value for rotating the exhaust fan at a first target rotation speed. The CPU rotates the exhaust fan based on the first control setting value, and permits the image forming unit to form an image when a rotation speed of the exhaust fan becomes equal to or faster than a lower limit rotation speed for suppressing a discharge amount of UFPs. When a predetermined time period has elapsed, the CPU performs feedback control for the exhaust fan such that the exhaust fan is rotated faster than the first target rotation speed.