JP4914328B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus.

2. Description of the Related Art Conventionally, an image forming apparatus such as a printer is connected to a host device such as a host computer via a network or the like, and prints by receiving print data from the host device. In this case, if the operator turns off the power switch of the image forming apparatus while the image forming apparatus is communicating with the upper apparatus, the print data being received from the upper apparatus is lost. Therefore, when print data is being received from the host device or when the received print data is being printed, even if the power switch is turned off, the power supply to the image forming apparatus is not turned off, and all printing is performed. There has been proposed a technique for turning off power supply to an image forming apparatus after receiving data and finishing printing of all print data (see, for example, Patent Document 1). This prevents the received print data from being lost even if the operator accidentally turns off the power switch.
JP-A-7-288929

  However, in the conventional image forming apparatus, the power supply to the image forming apparatus is not turned off while print data is being received or during printing of the print data. Even when the power switch is turned off, the power supply to the image forming apparatus is not turned off. Therefore, for example, even when it is necessary to stop the operation of the image forming apparatus, such as when an error occurs in the image forming apparatus while receiving print data or printing the print data, all printing is performed. Since it is necessary to wait until data is received and printing of all print data is completed, it takes time to turn off the power supply to the image forming apparatus.

  The present invention solves the problems of the conventional image forming apparatus, and when an operation to turn off the power supply is performed, the power supply is turned off when an operation to disable reception of image information is performed. Thus, the power supply is not turned off by mistake during image information reception or image formation, and if necessary, the power is forcibly applied even during image information reception or image formation. An object of the present invention is to provide an image forming apparatus that can turn off the power supply and turn off the power supply in a short time without waiting for a long time.

Therefore, in the image forming apparatus of the present invention, an image forming apparatus that receives image information and forms an image, a receiving unit that receives image information from a higher-level device, and a state in which the receiving unit can receive and receive A control unit for switching to a disabled state, a power supply unit for supplying power to the image forming apparatus, a power control unit for controlling power supply of the power supply unit, and a state for switching between a receivable state and a receivable state An online key, a power key for setting power supply on or power supply off, an operation unit including a display unit, an abnormality detection unit for detecting an abnormal state of the image forming apparatus, and setting of the image forming apparatus and a storage unit for storing information, if the abnormal state of the image forming apparatus by said abnormality detecting unit is detected, the control unit, not ready like the state of the receiver from the reception state When the power key is pressed after that, the control unit determines whether the setting for power supply stored in the storage unit is power supply on or power supply off, If the power supply is on, the power supply setting is turned off, and the power control unit cuts off the power supply of the power supply unit because the reception unit is in a reception-disabled state, and detects the abnormality. When the abnormal state of the image forming apparatus is not detected by the unit, if the receiving unit is in a receivable state, the display unit displays a prompt to press an online key, and if the online key is pressed, When the state of the receiving unit is switched to a non-receivable state and the setting for power supply is power supply off, the power control unit cuts off the power supply of the power supply unit.

  According to the present invention, when an operation for turning off the power supply is performed, the image forming apparatus turns off the power supply when an operation for disabling reception of image information is performed. As a result, the power supply is not turned off due to an erroneous operation during reception of image information or image formation, and if necessary, power is forcibly applied even during reception of image information or image formation. The supply can be turned off, and the power supply can be turned off in a short time without waiting for a long time.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing the configuration of the image forming apparatus according to the first embodiment of the present invention. FIG. 2 is a diagram showing the configuration of the printer engine of the image forming apparatus according to the first embodiment of the present invention.

  In FIG. 1, reference numeral 10 denotes an image forming apparatus according to the present embodiment. For example, the image forming apparatus is a printer, a facsimile machine, a copying machine, a multi-function machine having various functions, or the like. Here, the image forming apparatus 10 will be described as an electrophotographic printer that forms an image by an electrophotographic method. The image forming apparatus 10 may be an apparatus that forms a color image, but in the present embodiment, for convenience of explanation, it is assumed that the image forming apparatus 10 is an apparatus that forms a monochrome image.

  The image forming apparatus 10 is connected to a computer 11 as a host apparatus via a communication line (not shown) such as a LAN (Local Area Network), receives image information as print data from the computer 11, The image information is printed on a recording medium such as paper. The computer 11 is, for example, a general personal computer provided with arithmetic means such as a CPU and MPU, storage means such as a magnetic disk and a semiconductor memory, a communication interface, and the like. Any type of apparatus may be used as long as the apparatus has a function of creating image information for transmitting the image information and a function of transmitting the image information to the image forming apparatus 10.

  Here, as shown in FIG. 1, the image forming apparatus 10 includes a receiving unit 12, a control unit 13, an operation / display unit 14 as an operation unit, an image forming unit 15, a power control unit 16, and a power supply unit 17. Have

  The receiving unit 12 receives image information from the computer 11 and takes two states: a receivable state in which image information can be received and a non-receivable state in which image information cannot be received. be able to.

  The control unit 13 is a part that comprehensively controls the operation of each unit of the image forming apparatus 10. Then, the receiving unit 12 is controlled to control switching between a receivable state and a receivable state. Note that switching between the receivable state and the unreceivable state can also be set by the operator of the image forming apparatus 10 operating the operation / display unit 14.

  Further, the image forming unit 15 is a part that forms an image based on image information received from the computer 11 based on the control of the control unit 13, and includes a printer engine 45 that forms an image by an electrophotographic method. The control unit 13 transfers the image information received by the receiving unit 12 from the computer 11 to the image forming unit 15.

  Then, the power control unit 16 controls the power supply unit 17 to cut off the power supply ON state for supplying power to each unit of the image forming apparatus 10 and the power supply to each unit of the image forming apparatus 10. This is the part to switch to the power supply off state. The power supply unit 17 is a part that supplies power to each unit of the image forming apparatus 10 based on the control of the power control unit 16. The power supply ON and the power supply OFF can be set by the operator of the image forming apparatus 10 operating the operation / display unit 14. In the present exemplary embodiment, control is performed to determine whether power is supplied to or disconnected from each unit of the image forming apparatus 10 based on whether the power supply is on or off, and whether reception is possible or reception is not possible. To do.

  As shown in FIG. 2, the printer engine 45 includes a photosensitive drum 71, a charging unit 72, an exposure unit 73, a developing unit 74, a transfer unit 75, a fixing unit 76, a registration roller 77, a hopping roller 78, and A paper cassette 79 is provided.

  The sheets as recording media stacked and set in the sheet cassette 79 are fed one by one by the hopping roller 78 and sent to the registration roller 77. Subsequently, the sheet is sent out by the registration roller 77 at a predetermined timing, and the toner image formed on the photosensitive drum 71 is transferred by the transfer unit 75. When the paper is sent to the fixing unit 76, a fixing process is performed by a heating roller or the like provided in the fixing unit 76, and the heated and pressurized toner image is melted and fixed on the paper. Subsequently, the sheet on which the toner image is fixed is discharged to the outside of the image forming apparatus 10.

  The photosensitive drum 71 is an image carrier that can rotate at a predetermined rotational speed, and is a member in which a photoconductive layer is formed on the surface of a drum-shaped conductor such as aluminum, and stores charges on the surface. And surface charge can be removed. The charging unit 72 is a device for uniformly charging the surface of the photosensitive drum 71, and applies a predetermined voltage to the surface of the photosensitive drum 71.

  Further, the exposure unit 73 is an exposure device for selectively exposing the surface of the uniformly charged photoreceptor drum 71 to form a latent image pattern. For example, an LED (Light Emitting Diode) element and an LED It consists of a drive element and a lens array, and is arranged at a position where the irradiation light from the LED element forms an image on the surface of the photosensitive drum 71. Further, the developing unit 74 is, for example, a developing roller as a developer carrying member, which is in contact with the photosensitive drum 71 with a certain pressure, and is formed on the photosensitive drum 71 by the exposing unit 73. Is developed with toner. Further, the transfer unit 75 is disposed so as to face the photoconductive drum 71 across the paper conveyance path, and electrostatically transfers the toner image formed on the photoconductive drum 71 to the paper.

  Next, the configuration of the control system of the image forming apparatus 10 will be described.

  FIG. 3 is a diagram showing the configuration of the control system of the image forming apparatus according to the first embodiment of the present invention, and FIG. 4 is a diagram showing the configuration of the operation panel unit of the image forming apparatus according to the first embodiment of the present invention. It is.

  As shown in the figure, the image forming apparatus 10 includes an address / data bus 21 as a signal transmission circuit, a host interface unit 22 corresponding to the receiving unit 12, a CPU 23 corresponding to the control unit 13, and a program ROM 33. , An image data storage memory 43 and a device setting information storage memory 53, an operation panel unit 24 and an operation panel interface unit 34 corresponding to the operation / display unit 14, and a printer engine interface unit corresponding to the image forming unit 15. 25, a printer engine control unit 35 and a printer engine 45, a power source control unit 26 corresponding to the power control unit 16, and a power source unit 27 corresponding to the power supply unit 17.

  The CPU 23 performs overall control such as system control of the entire image forming apparatus 10 and management of the flow of print data. The control program data of the CPU 23 is stored in the program ROM 33. The image data storage memory 43 is a memory for storing image information received from the computer 11, that is, print data. Further, the device setting information storage memory 53 is a memory for storing information related to the operation of the image forming apparatus 10. The CPU 23 accesses the program ROM 33, the image data storage memory 43, and the device setting information storage memory 53 via the address / data bus 21, and reads and stores necessary information. In the present embodiment, various settings such as the power supply on and power supply off settings, the reception enabled state and the reception disabled state described above are stored in the device setting information storage memory 53. To do.

  Further, the CPU 23 can perform communication processing with the host 11, that is, the computer 11 functioning as a host device via the host interface unit 22. The host interface unit 22 is an interface that conforms to standards such as USB (Universal Serial Bus) 2.0, IEEE 1284, IEEE 1394, Ethernet (R), and the like, and receives print data from the computer 11 in accordance with the standards.

  Here, the receivable state is a state in which the host interface unit 22 can connect to the computer 11, and a state in which the image forming apparatus 10 and the computer 11 can communicate with each other via the host interface unit 22. It is. On the other hand, the reception disabled state is a state in which the host interface unit 22 is disconnected from the computer 11, and communication between the image forming apparatus 10 and the computer 11 is impossible.

  The operation panel unit 24 functions as a man-machine interface between the image forming apparatus 10 and an operator, and includes an LCD (Liquid Crystal Display) display unit 44 and an operation key unit 54. As shown in FIG. 4, the LCD display unit 44 is a display that displays information input by the operator, a control state inside the image forming apparatus 10, and the like, and the operation key unit 54 is a control desired by the operator. This is a keyboard switch for inputting contents. The operation key unit 54 includes an online key as input means for switching between a receivable state and a receivable state, and a power key for setting power supply on and power supply off. The operation panel interface unit 34 is an interface circuit that is disposed between the address / data bus 21 and the operation panel unit 24 and transmits and receives signals.

  Further, the power supply unit 27 is a part that supplies power to each unit of the image forming apparatus 10. The power supply is turned on to supply power to each unit of the image forming apparatus 10, and to each unit of the image forming apparatus 10. It is possible to switch to a power supply off state in which the power supply is cut off.

  The power supply control unit 26 controls the power supply unit 27 in accordance with an instruction from the CPU 23 to switch between a power supply on state and a power supply off state.

  The printer engine interface unit 25 is an interface circuit that transfers print data to the printer engine control unit 35 and transmits and receives control signals in accordance with instructions from the CPU 23. The printer engine 45 prints on the paper based on the print data. Further, the printer engine control unit 35 controls motors and various sensors (not shown) included in the printer engine 45.

  When the host interface unit 22 connected to the computer 11 receives print data from the computer 11, an interrupt signal is generated. Then, the CPU 23 recognizes the reception of the print data in the interrupt process, and transmits the received print data from the host interface unit 22 via the address / data bus 21 to the image data storage memory 43 for storage. The image data storage memory 43 is used as a print buffer, and print data is transmitted to the printer engine interface unit 25 via the address / data bus 21. Then, the printer engine interface unit 25 transmits the received print data to the printer engine control unit 35. The printer engine control unit 35 controls the printer engine 45 to reproduce the print data and print it on paper.

  Next, the operation of the image forming apparatus 10 having the above configuration will be described.

  FIG. 5 is a time chart showing the operation of the image forming apparatus according to the first embodiment of the present invention, and FIG. 6 is a flowchart showing the operation of the image forming apparatus according to the first embodiment of the present invention.

  First, when the image forming apparatus 10 is powered on, the power supply unit 27 supplies power to each unit of the image forming apparatus 10.

  Subsequently, the CPU 23 performs initial setting, and each initial setting of a peripheral LSI (Large Scale Integrated Circuit) (not shown) and each memory such as a program ROM 33, an image data storage memory 43, a device setting information storage memory 53, and the like. Initialize the. Further, the CPU 23 instructs the printer engine control unit 35 to prepare for printing via the printer engine interface unit 25. Then, the printer engine control unit 35 performs print preparation control for the printer engine 45, and thereby the image forming apparatus 10 enters a standby state.

  Subsequently, the CPU 23 performs a transition control to a receivable state and enables communication with the computer 11 via the host interface unit 22. As a result, the image forming apparatus 10 is in a receivable state.

  Subsequently, the CPU 23 monitors the operation key unit 54 via the operation panel interface unit 34, and the power key of the operation key unit 54 is operated by the operator while the power supply unit 27 is supplying power to each unit of the image forming apparatus 10. It is determined whether or not has been pressed.

  When the power key is pressed, the CPU 23 determines whether or not the power supply setting stored in the device setting information storage memory 53 is a power supply off setting. If the power supply is not turned off, that is, if the power supply is turned on, the CPU 23 sets the power supply off and stores the setting in the device setting information storage memory 53.

  Subsequently, the CPU 23 determines whether or not the host interface unit 22 is in a state where connection with the computer 11 is possible, that is, whether or not the receiving unit 12 is in a receivable state. When the reception is possible, the CPU 23 sends an “online key to turn off the power” on the LCD display 44 of the operation panel 24 via the operation panel interface 34 as shown in FIG. Is pressed ", and the operator is notified of the next operation method (time T1 in FIG. 5).

  As described above, if the power key has not been pressed by determining whether or not the power key has been pressed, the CPU 23 continues to display “turn off power” on the LCD display unit 44 of the operation panel unit 24. “If you do, press the online key”. If the power supply is turned off by determining whether or not the power supply is turned off, the CPU 23 sets the power supply on and stores the setting in the device setting information storage memory 53. After that, the LCD display unit 44 of the operation panel unit 24 is displayed such as “Press the online key when turning off the power”.

  Subsequently, the CPU 23 monitors the operation key unit 54 via the operation panel interface unit 34, and determines whether or not the online key of the operation key unit 54 has been pressed by the operator. If the online key has not been pressed, the CPU 23 determines again whether the power key has been pressed and repeats the subsequent operations. If the online key is pressed (time T2 in FIG. 5), the CPU 23 determines whether print data is being received from the computer 11, that is, whether data is being received.

  When data is being received, the CPU 23 performs a data reception disconnection process (time T3 in FIG. 5), and controls the host interface unit 22 to stop receiving print data from the computer 11. Subsequently, the CPU 23 controls the transition to the reception disabled state (time T4 in FIG. 5), controls the host interface unit 22, and sets the reception disabled state in which communication with the computer 11 is impossible. Note that, as described above, if it is determined whether or not data is being received and data is not being received, the CPU 23 performs control to shift to a reception disabled state as it is.

  Subsequently, the CPU 23 determines whether or not the power supply setting stored in the device setting information storage memory 53 is a power supply off setting. If the power supply is not turned off, that is, if the power supply is turned on, the CPU 23 determines again whether the power key has been pressed and repeats the subsequent operations.

  When the power supply is set to off, the CPU 23 determines whether printing is in progress. As described above, if the receiving unit 12 is in a receivable state and is not in a receivable state, the CPU 23 determines whether printing is in progress.

  When printing is in progress, the CPU 23 performs a print stop process (time T5 in FIG. 6). In the print stop process, the CPU 23 instructs the printer engine control unit 35 to stop printing via the printer engine interface unit 25. Then, the printer engine control unit 35 controls the printer engine 45 to print the currently printing page, and then stops printing.

  Subsequently, the CPU 23 performs a power-off process to stop the image forming apparatus 10 in a power-off state (time T6 in FIG. 6). Note that as described above, it is determined whether printing is in progress, and if printing is not in progress, the CPU 23 performs power-off processing as it is. In the power-off process, the CPU 23 instructs the power control unit 26 to turn off the power supply. Then, the power supply control unit 26 controls the power supply unit 27 to switch to a power supply off state in which the power supply to each unit of the image forming apparatus 10 is cut off. As a result, the power supply unit 27 cuts off the supply of power to each unit of the image forming apparatus 10 and the image forming apparatus 10 is turned off.

Next, a flowchart will be described.
Step S1: The power is turned on.
Step S2 Perform initial setting.
Step S3: Control to shift to the receivable state.
Step S4: It is determined whether or not the power key has been pressed. If the power key has been pressed, the process proceeds to step S5. If the power key has not been pressed, the process proceeds to step S9.
Step S5: It is determined whether or not the power supply is set to off. If the power supply is set to off, the process proceeds to step S7. If the power supply is not set to off, the process proceeds to step S6.
Step S6: The power supply is turned off.
Step S7: The power supply is turned on.
Step S8: It is determined whether the receiving unit 12 is in a receivable state. If the receiving unit 12 is in a receivable state, the process proceeds to step S9. If the receiving unit 12 is not in a receivable state, the process proceeds to step S14.
Step S9: It is determined whether or not the online key has been pressed. If the online key has been pressed, the process proceeds to step S10. If the online key has not been pressed, the process returns to step S4.
Step S10: It is determined whether data is being received. If data is being received, the process proceeds to step S11. If data is not being received, the process proceeds to step S12.
Step S11: Data reception disconnection processing is performed.
Step S12: Control to shift to the reception disabled state.
Step S13: Whether the power supply is set to off is determined. If the power supply is set to off, the process proceeds to step S14. If the power supply is not set to off, the process returns to step S4.
Step S14: It is determined whether printing is in progress. If printing is in progress, the process proceeds to step S15. If printing is not in progress, the process proceeds to step S16.
Step S15 Print stop processing is performed.
Step S16: Power-off processing is performed and the processing is terminated.

  As described above, in the present embodiment, when the receiving unit 12 is in a receivable state, the power supply is turned off even if the power key is pressed, that is, the power supply is turned off. Accordingly, it is possible to prevent the power supply of the image forming apparatus 10 from being turned off due to an erroneous operation by the operator during reception of print data or printing of print data. Moreover, in addition to the operation for turning off the power supply, when the online key is pressed, that is, when the operation for disabling the reception of print data is made, the power supply is turned off. When the operator wants to forcibly turn off the power supply to the image forming apparatus 10, a short time is required without waiting for a long time until the reception of print data or the print processing of all print data is completed. Thus, the power supply of the image forming apparatus 10 can be turned off.

  Next, a second embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st Embodiment, the description is abbreviate | omitted by providing the same code | symbol. The description of the same operation and the same effect as those of the first embodiment is also omitted.

  FIG. 7 is a block diagram showing the configuration of the image forming apparatus according to the second embodiment of the present invention.

  In the present embodiment, the control unit 13 includes an abnormality detection unit 31 therein. When detecting the abnormal state of the image forming apparatus 10, the abnormality detection unit 31 instructs the control unit 13 to switch from the receivable state to the unreceivable state. Since the control unit 13 corresponds to the CPU 23, the CPU 23 also executes the operation of the abnormality detection unit 31.

  Other configurations are the same as those in the first embodiment, and a description thereof will be omitted.

  Next, the operation of the image forming apparatus 10 in the present embodiment will be described.

  FIG. 8 is a flowchart showing the operation of the image forming apparatus according to the second embodiment of the present invention.

  The operation from the time when the image forming apparatus 10 is turned on until the CPU 23 determines whether or not a device alarm for shifting to the reception disabled state has occurred is the same as that in the first embodiment. Therefore, the description is omitted.

  The CPU 23 determines whether an abnormal state of the image forming apparatus 10 that needs to be switched from the receivable state to the unreceivable state is detected, that is, whether a device alarm that shifts to the unreceivable state has occurred. To do.

  Here, the case where an abnormal state of the image forming apparatus 10 that needs to be switched to the reception disabled state is detected means that, for example, the CPU 23 indicates that the image data storage memory 43 has become an error or has become full. Is detected, the CPU 23 receives from the printer engine control unit 35 an error occurrence notification that disables printing.

  Then, when it is determined whether or not a device alarm that shifts to a reception disabled state has occurred and no device alarm has occurred, the CPU 23 performs an operation to determine whether or not the above-described online key has been pressed. Do.

  Further, when it is determined whether or not a device alarm that shifts to the reception disabled state has occurred and the device alarm has occurred, the CPU 23 performs the same operation as when the above-described online key has not been pressed.

  Since subsequent operations are the same as those in the first embodiment, description thereof will be omitted.

Next, a flowchart will be described.
Step S21: The power is turned on.
Step S22 Initial setting is performed.
Step S23: Control to shift to the receivable state.
Step S24: It is determined whether or not the power key has been pressed. If the power key has been pressed, the process proceeds to step S25. If the power key has not been pressed, the process proceeds to step S29.
Step S25: Whether the power supply is set to off is determined. If the power supply is set to off, the process proceeds to step S27. If the power supply is not set to off, the process proceeds to step S26.
Step S26 The power supply is turned off.
Step S27 The power supply is turned on.
Step S28: It is determined whether or not the receiving unit 12 is in a receivable state. If the receiving unit 12 is in a receivable state, the process proceeds to step S29. If the receiving unit 12 is not in a receivable state, the process proceeds to step S35.
Step S29: It is determined whether or not a device alarm for shifting to the reception disabled state has occurred. If a device alarm that shifts to the reception disabled state has not occurred, the process proceeds to step S30. If a device alarm that shifts to the reception disabled state has occurred, the process returns to step S24.
Step S30: It is determined whether or not the online key has been pressed. If the online key has been pressed, the process proceeds to step S31. If the online key has not been pressed, the process returns to step S24.
Step S31: It is determined whether data is being received. If the data is being received, the process proceeds to step S32. If the data is not being received, the process proceeds to step S33.
Step S32: Data reception disconnection processing is performed.
Step S33 Control to shift to the reception disabled state is performed.
Step S34: Whether the power supply is set to off is determined. If the power supply is set to off, the process proceeds to step S35. If the power supply is not set to off, the process returns to step S24.
Step S35: to judge whether printing is in progress. If printing is in progress, the process proceeds to step S36. If printing is not in progress, the process proceeds to step S37.
Step S36 Print stop processing is performed.
Step S37: Power-off processing is performed and the processing is terminated.

  As described above, in the present exemplary embodiment, the image forming apparatus 10 has an abnormal state in which print data cannot be received from the computer 11 or an abnormal state in which the image forming apparatus 10 cannot be recovered unless the power supply is turned off. In this case, the power supply of the image forming apparatus 10 can be turned off immediately.

  The first and second embodiments described above are merely examples for the present invention, and the present invention is not limited to the image forming apparatus 10 configured as shown in FIG. The present invention can be implemented by various printer apparatuses, and can also be applied to facsimile machines, copiers, multifunction machines, other types of peripheral devices, and the like.

  The present invention is not limited to the above-described embodiment, and various modifications can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention.

1 is a block diagram illustrating a configuration of an image forming apparatus according to a first embodiment of the present invention. 1 is a diagram illustrating a configuration of a printer engine of an image forming apparatus according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration of a control system of the image forming apparatus in the first embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration of an operation panel unit of the image forming apparatus according to the first embodiment of the present invention. 3 is a time chart illustrating the operation of the image forming apparatus according to the first embodiment of the present invention. 3 is a flowchart showing an operation of the image forming apparatus in the first embodiment of the present invention. It is a block diagram which shows the structure of the image forming apparatus in the 2nd Embodiment of this invention. 6 is a flowchart illustrating an operation of the image forming apparatus according to the second embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 11 Computer 12 Reception part 13 Control part 14 Operation / display part 16 Power control part 17 Power supply part 31 Abnormality detection part

Claims (1)

(A) An image forming apparatus that receives image information and forms an image,
(B) a receiving unit that receives image information from the host device;
(C) a control unit that switches the receiving unit between a receivable state and a receivable state;
(D) a power supply unit that supplies power to the image forming apparatus;
(E) a power control unit that controls power supply of the power supply unit;
(F) an online key for switching between a receivable state and a receivable state, a power key for setting power supply on or power supply off , and an operation unit including a display unit ;
(G) an abnormality detection unit for detecting an abnormal state of the image forming apparatus;
(H) a storage unit for storing setting information of the image forming apparatus ;
(I) When the abnormality detection unit detects an abnormal state of the image forming apparatus, the control unit switches the state of the reception unit from a receivable state to a non-receivable state, and then the power key is pressed. When the power supply is stored, the control unit determines whether the setting for power supply stored in the storage unit is power supply on or power supply off. If the power supply is on, the power supply is determined. The power supply is turned off, and the power control unit cuts off the power supply of the power supply unit because the reception unit is in a reception-disabled state.
(J) When the abnormal state of the image forming apparatus is not detected by the abnormality detection unit, if the reception unit is in a receivable state, the display unit displays a prompt to press an online key, and the online key is pressed When the power supply is switched, the state of the reception unit is switched to a reception disabled state, and the power control unit cuts off the power supply of the power supply unit when the setting for power supply is power supply off. Image forming apparatus.

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