JP2006142551A - Image forming apparatus, and its control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus in which presence of a suspended job is checked when a power switch being operated by a user at the end of work is turned off, a power supply is turned off if there is no suspended job, otherwise a display for urging the user to make a selection whether the suspended job is performed or not is presented on an operation display means and on/off of the power supply is controlled in correspondence with selection results of the user, and to provide a control method of the image forming apparatus. <P>SOLUTION: The image forming apparatus comprises a first power switch provided between a commercial power supply and the power supply, and a second power switch for delivering information, designating on/off of power being supplied from the power supply to each load, to a control means. Upon delivery of information for designating the second power switch to turn off power, the control means checks presence of a suspended job and performs on/off control of the power supply. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to power control of an image forming apparatus such as a copying machine, a printer, and a facsimile.

  When an image forming apparatus such as a copying machine, a printer, or a facsimile is used, a plug at one end of a power cord of the image forming apparatus is inserted into an outlet that is a commercial power supply port provided in a building to receive power. The received power is normally supplied to the power supply device of the image forming apparatus via a power connector and a power switch.

  The power supply device converts the power received from the commercial power source into various electrical loads of the image forming apparatus, such as voltage conversion, AC / DC conversion, constant voltage, etc. Supply.

  Accordingly, such a power supply apparatus is provided with a plurality of power supply ports for supplying power to each load, and for individually turning on / off the power supplied to each load according to instruction information sent from the outside. A power supply control means is also provided.

  The image forming apparatus is provided with a first power switch that cuts off electric power (on / off) between the commercial power source and the power source device of the image forming apparatus, and the first power switch is off. Sometimes, the power supplied to the image forming apparatus is zero, and all electrical operations are stopped.

  If the image forming apparatus is configured to be turned on / off only with such a first power switch, all controls are stopped when the image forming apparatus is off, and information cannot be exchanged with an external apparatus. Even when the power switch is turned on when using the image forming apparatus, a long warm-up time and a time for initial setting are required.

  In order to avoid such an inconvenience, a second power switch is provided, and when the user finishes the work with the image forming apparatus and does not use the device for a long time, the second power switch is generally turned off. Has been done. In this case, even if the second switch is turned off, it is configured so that power is supplied to a portion related to a predetermined operation of the control means, and for necessary management with minimum power. It enables control and information exchange with external devices.

  On the other hand, some recent image forming apparatuses have a function that allows a user to make reservation settings for a plurality of jobs in advance using the operation display means of the image forming apparatus, and has a function of sequentially executing reserved jobs. Many came to be seen.

  However, among the reserved jobs, for example, a job that is difficult to execute, such as a case where paper of a size necessary for executing the job is not loaded in the image forming apparatus at that time, Alternatively, there may be a job that needs to be changed. In order to deal with such a case, a job for which job execution is to be stopped is designated from a queue in which accepted jobs are arranged in the order of acceptance, and the designated jobs are sequentially stored in a predetermined queue means for execution. There is also a proposal of sequentially executing possible jobs (for example, see Patent Document 1).

However, when all the reserved jobs are executed, the user may determine that all the jobs set in the image forming apparatus have ended and turn off the second power switch described above. . In this case, the information related to the held job often disappears when the second power switch is turned off, or it is often necessary to warm up again in order to execute the job.
JP-A-8-286895 (first page)

The present invention has been made in view of the situation described above, and when a power switch operated by a user at the end of work is turned off,
Determine if there are any pending jobs,
If there is no held job, turn off the power supplied to each load from the power supply,
If there are pending jobs,
A display prompting the user to select whether or not to execute the held job is output to the operation display means.
An object of the present invention is to provide an image forming apparatus that controls on / off of a power supply device in accordance with a user selection result, and a method for controlling the image forming apparatus.

The above objects can be achieved by realizing an image forming apparatus and an image forming method of the image forming apparatus described in the following claims.
(Claim 1)
An operation display means capable of setting a plurality of jobs to be reserved in a job file and a setting to hold execution of a specified job in a hold job file;
A power supply device that receives power from a commercial power supply and supplies power of a predetermined specification to each load, and includes a power supply control unit that controls on / off of power supply to each load;
A first power switch provided between a commercial power supply and the power supply device;
Control means for sending, to the power supply control means, first instruction information for instructing on / off of power supplied from the power supply device to each load;
A second power switch for sending to the control means second instruction information for instructing on / off of power supplied from the power supply device to each load;
In an image forming apparatus having
When the second power switch outputs second instruction information for turning off the power,
The control means includes
Determine whether there are any jobs held in the hold job file,
If there is no held job, the first instruction information for turning off the power supplied to each load from the power supply device is sent to the power supply control means,
If there are pending jobs,
An image forming apparatus, wherein the first instruction information for continuing the ON state is sent to the power supply control means.
(Claim 2)
The control means includes
While sending the first instruction information to continue the ON state to the power supply control means,
An indication to inform the user that there is a pending job,
The image forming apparatus according to claim 1, wherein a display prompting the user to select whether or not to execute a held job is output to the operation display unit.
(Claim 3)
The control means includes
When execution of a held job is selected, it is confirmed that the second power switch has been switched from OFF to ON, and the display of the operation display means is displayed by the second power switch. To return to the state just before it was switched off,
When it is selected not to execute the held job, the confirmation information input by the operation display unit is confirmed, and first instruction information for turning off the power supplied to each load is displayed as the power source. The image forming apparatus according to claim 2, wherein the image forming apparatus is sent to a control unit.
(Claim 4)
An operation display means capable of setting a plurality of jobs to be reserved in a job file and a setting to hold execution of a specified job in a hold job file;
A power supply device that receives power from a commercial power supply and supplies power of a predetermined specification to each load, and includes a power supply control unit that controls on / off of power supply to each load;
A first power switch provided between a commercial power supply and the power supply device;
Control means for sending, to the power supply control means, first instruction information for instructing on / off of power supplied from the power supply device to each load;
A second power switch for sending to the control means second instruction information for instructing on / off of power supplied from the power supply device to each load;
In an image forming apparatus control method comprising:
When the second power switch outputs second instruction information for turning off the power,
Determine whether there are any jobs held in the hold job file,
If there is no held job, the first instruction information for turning off the power supplied to each load from the power supply device is sent to the power supply control means,
If there are pending jobs,
A control method for an image forming apparatus, characterized in that control is performed so that first instruction information for continuing an on state is sent to the power supply control means.
(Claim 5)
While sending the first instruction information to continue the ON state to the power supply control means,
An indication to inform the user that there is a pending job,
5. The method of controlling an image forming apparatus according to claim 4, wherein control is performed so that a display prompting a user to select whether or not to execute a held job is output to the operation display unit.
(Claim 6)
When execution of a held job is selected, it is confirmed that the second power switch has been switched from OFF to ON, and the display of the operation display means is displayed by the second power switch. To return to the state just before it was switched off,
When a selection is made not to execute a held job, confirmation information input by the operation display means is confirmed, and first instruction information for turning off the power supplied to each load is displayed as the power supply. 6. The method of controlling an image forming apparatus according to claim 5, wherein control is performed so that the image is sent to a control unit.

  According to the first aspect of the present invention, an image that prevents the loss of the held job that occurs when the user turns off the power switch of the image forming apparatus without noticing the presence of the held job. A forming apparatus is realized.

  According to the second aspect of the present invention, when the user turns off the power switch of the image forming apparatus without noticing the presence of the held job, the user is notified that the held job exists. Thus, an image forming apparatus that allows the user to select the response to the held job is realized.

  According to the third aspect of the present invention, when the user turns off the power switch of the image forming apparatus without noticing the presence of the held job, the user is notified that the held job exists. Thus, an image forming apparatus that realizes an on / off control of the power supplied to each load based on the selected result by causing the user to select a response to the held job is realized.

  According to the fourth aspect of the present invention, an image that prevents the loss of the held job that occurs when the user turns off the power switch of the image forming apparatus without noticing the presence of the held job. A forming apparatus control method is realized.

  According to the fifth aspect of the present invention, when the user turns off the power switch of the image forming apparatus without noticing the presence of the pending job, the user is notified that the pending job exists. Thus, a control method of the image forming apparatus that allows the user to select the response to the held job is realized.

  According to the sixth aspect of the present invention, when the user turns off the power switch of the image forming apparatus without noticing the presence of the pending job, the user is notified that the pending job exists. Then, the control method of the image forming apparatus is realized in which the user selects the response to the held job and the power supplied to each load is turned on / off based on the selected result.

  Hereinafter, the present invention will be described with reference to the drawings.

  FIG. 1 is a conceptual diagram of an image forming system including an image forming apparatus and peripheral devices.

  The image forming apparatus A is connected to an automatic document feeder ADF, a large-capacity paper feed tray LCT, and a post-processing device FIN, which are peripheral devices.

  The automatic document feeder ADF separates the documents d placed on the document table 210 one by one, sends them to the document conveyance path 201, winds them on the conveyance drum 202, and conveys them. The document d being conveyed is read by the document reading unit 1 at the document reading position 11 below the conveyance drum 202. The document d that has been read is discharged to a document discharge tray 205 by a first document transport guide 203 having a switching mechanism and a document discharge roller 204.

  When reading images on both sides of the document d, the document d on which the document image on the first surface is read is sent out in the direction of the arrow a by the first document conveyance guide 203 and the reverse roller 206, and the rear end is reversed. It stops once in a state of being pinched by the roller 206. Thereafter, when the reversing roller 206 starts reversing, the document d once stopped is switched to the first document conveying guide 203 with the trailing edge as the leading edge of the document d and the front and back being reversed. It is guided to a second document conveyance guide 207 having a mechanism and sent again to the document conveyance path. The document d sent out is scanned on the second side of the document image, and is discharged to the document discharge tray 205 by the first document transport guide 203 and the document discharge roller 204.

  The image forming apparatus A includes an original reading unit 1, an image writing unit 2, an image forming unit 3, a fixing unit 4, a reversing unit 5, a refeed unit 6, a sheet feeding unit 7, an operation display unit 8, a control unit C1, and the like. It is configured.

  The document reading means 1 irradiates the document surface of the document d conveyed by the automatic document feeder ADF at the document reading position 11 with the exposure lamp 12 and reflects the reflected light to the first mirror unit 13 and the second mirror. The original image is read by forming an image on the light receiving surface of the image sensor CCD by the unit 14 and the imaging lens 15.

  The image signal output from the image pickup device CCD is A / D converted by the input image processing means 16, subjected to processing such as shading correction and compression, and is sent to the control means C 1 as document image information and is sent to the memory M. Remembered.

  The stored document image information is used as image information sent to the network via the communication means T1 when the scanner mode for reading the document and transferring the obtained information to another device is set in the image forming apparatus. When a print mode for creating a hard copy from an original is set, it is used as image information for creating a hard copy.

  The image writing means 2 forms a latent image by scanning the surface of the photosensitive drum 31 of the rotating image forming means 3 with a laser beam using the image information read from the memory M of the control means C1. Thus, it is a known one composed of a semiconductor laser, a polygon mirror, a cylindrical lens, a plane mirror and the like.

  The image forming unit 3 includes a charging unit 32, a developing unit 33, a transfer separating unit 34, and a cleaning unit 35 arranged around the photosensitive drum 31. The photosensitive drum 31 whose peripheral surface is uniformly charged by the charging unit 32 is formed with a latent image by the writing unit 2 and then developed by the developing unit 33. A toner image is formed on the peripheral surface of the developed photosensitive drum 31, and is transferred onto the paper P fed from the paper feeding unit 7 by the transfer separation unit 34. The sheet P carrying the toner image is sent to the fixing unit 4, and the toner remaining on the surface of the photoreceptor drum 31 after the transfer of the toner image is removed by the cleaning unit 35 and is used for the next image formation.

  The fixing unit 4 conveys the paper P sent from the image forming unit 3 by the heating roller 41 and the pressure roller 42 arranged to face each other while being heated under pressure. To settle.

  The reversing unit 5 sends the paper P sent from the fixing unit 4 to the post-processing device FIN by the reversing guide 51 and the paper discharge roller 54.

  When the paper P is reversed and sent out, the reverse guide 51 is switched to the dotted line position in the figure, the paper P is guided downward, and then the first reverse roller 52 and the second reverse roller 53 are reversed, and the paper The rear end of P is changed to the front end and sent to the paper discharge roller 54.

  In addition, when performing so-called double-sided copying work in which image formation is performed on both sides of a sheet, the sheet P that has been fixed on the first side is guided downward by the reversing guide 51 and the trailing edge is secondly reversed. After being sandwiched between the rollers 53, this is reversed and sent out to the re-feeding means 6.

  The sheet refeeding unit 6 sends the paper P sent from the reversing unit 5 back to the sheet feeding / conveying unit 74 of the sheet feeding unit 7 to be used for image formation on the second surface.

  The paper feed means 7 includes paper feed trays 71, 72, 73 for storing the paper P, a plurality of rollers for taking out the paper P one by one from these trays and transporting the paper P to the paper feed roller 75, a guide member, A sheet feeding / conveying means 74 and a sheet feeding roller 75 are configured. In the present embodiment, a large-capacity paper feed tray LCT capable of stacking a large amount of paper P is connected to the image forming apparatus A. The paper P fed from here is sent to the paper feed roller 75 by the paper feed / conveying means 74 in the same manner as when fed from another paper feed tray.

  The paper feed roller 75 feeds the fed paper P in accordance with the toner image position on the photosensitive drum 31 after correcting the conveyance curve.

  The operation display means 8 is a combination of a display means for displaying characters and images and an operation means for a user to input an instruction operation, and is configured by a touch panel and push buttons.

  The post-processing apparatus FIN has a sheet mounting table 310, 311 on which various insertion sheets P2 are mounted, and a plurality of rollers and guides for sending the insertion sheet P2 from the sheet mounting table 310, 311 to each processing unit. A part of the sheet feeding means 300 made up of members and a paper discharge tray 390 for stacking a small amount of discharged paper P are arranged, and below these are the sheet feeding means 300, the punching means 320, and the shift means. 330, an intermediate stacker 360, a stapler 340, a folding means 350, paper discharge trays 391 and 392 for stacking a large amount of paper P that has been subjected to predetermined post-processing and output, and a control means C3 for controlling these means. Has been.

  The punching means 320 is used for filing on the sheet P formed and output by the image forming apparatus A and the insertion sheet P2 fed by the sheet feeding means 300 from the sheet placing tables 310 and 311 of the post-processing apparatus FIN. According to the conditions set by the operation display means of the image forming apparatus A or the operation display means of the post-processing apparatus F, the punching process is performed at a position corresponding to the size of the paper P and the insertion sheet. Do.

  The shift unit 330 is a processing unit that discharges the paper P and the insertion sheet P2 in the transport width direction by changing the paper discharge position for each part composed of a predetermined number of originals. This is determined by information sent from the control means C1 of the image forming apparatus A or information set by the operation display means 370 of the post-processing apparatus FIN.

  The stapler 340 is a binding unit that binds a bundle of sheets P and insertion sheets P2 stacked on the intermediate stacker 360 with a needle. The processing conditions such as the number of sheets to be bound, the binding position (for example, binding the vertical side portion or the horizontal side portion), and the number of bindings are displayed on the operation display unit 8 of the image forming apparatus A or the operation display of the post-processing apparatus F. It is determined by the conditions set by the means 370. The sheet P and the insertion sheet P2 after the binding process are finished are pushed up by the intermediate stacker 360, the end portions are nipped by the sheet discharge rollers 97, and then discharged onto the sheet discharge tray 391.

  The folding means 350 performs a folding process on the paper P accumulated on the intermediate stacker 360 and the insertion sheet P2, and discharges the paper P to the paper discharge tray 392 by the transport belt.

  As described above, the post-processing device F is provided with a plurality of placing means for placing sheets according to the purpose.

  The sheet placement tables 310 and 311 use the insertion sheet P2 prepared for addition to the paper P discharged from the image forming apparatus A or the post-processing apparatus F alone in an off-line state with respect to the image processing apparatus A. In this case, it is a placing means for placing various sheets. In this example, the post-processing apparatus F has two sheet placement tables, but may be provided with one or more than three sheet placement tables.

  A paper discharge tray 390 is a small capacity that receives paper P that has been discharged from the image forming apparatus A and processed by the post-processing apparatus F, and paper that has been processed from the sheet placement tables 310 and 311 and processed. It is a mounting means.

  The paper discharge tray 391 is a large-capacity placing means for receiving the paper P processed and discharged by the shift means 330 or the stapler 340 and the insertion sheet P2, and the paper discharge tray 392 is folded by the folding means 350. It is a placing means for receiving the sheet P and the insertion sheet P2.

  FIG. 2 is a block diagram illustrating the control relationship between the image forming apparatus A and peripheral devices. Note that blocks not related to the description of the present invention are not shown in the figure.

  The control unit C1 of the image forming apparatus A is a computer system that includes a memory M, an image processing chip, an input / output interface, a drive circuit, and the like with a CPU at the center. Control of each means by the control means C1 is performed by executing the program stored in the memory M. The control units C2, C3, and C4 of the automatic document feeder ADF, the post-processing device FIN, and the large-capacity paper feed tray LCT, which are peripheral devices, are also configured in a similar manner although they are small in scale. , T4. The communication unit T1 connects an external information processing device and the image forming apparatus A, and can thereby transmit image information from a plurality of information processing devices and output a copy to the image forming apparatus A. .

  As described with reference to FIGS. 1 and 2, this image forming system is a high-speed image forming system having multiple functions, and the user uses the operation display unit 8 of the image forming apparatus A in advance for the purpose. A plurality of jobs can be set.

FIG. 3 is a block diagram showing the power supply path of the power supply device D and the control relationship.
When the plug D0 is inserted into an outlet for supplying commercial power and the first power switch D1 of the image forming apparatus A is closed (turned on), power is supplied to the power conversion means D2 of the power supply D. The The power conversion means D2 performs processing such as voltage conversion, AC / DC conversion, constant voltage, etc. on the power supplied from the commercial power supply, and the electric load of each means included in the image forming apparatus A has a predetermined specification power. Supply.

  The power supply path is roughly divided into a, b, and c as shown in the figure. The power supply paths a and b become supply paths for starting power supply to the control means C1 and the power supply control means D3 when the first power switch D1 is turned on. On the other hand, the power supply path c is a plurality of power supply paths for supplying power of a predetermined specification to each means, and the first power switch D1 is turned on and the power control means D3 is turned on. When a signal is output, power is supplied to each means.

  When the first power switch D1 is turned on and then the second power switch D4 is turned on, the control means C1 detects that the second power switch D4 is turned on. The control means C1 that has obtained the detection information outputs a power-on signal to the power supply control means D3. The power conversion means D2 having obtained the power-on signal outputs a power-on signal to the power conversion means D2 so as to start power supply to each means.

  The control means C1 sends initial setting information for executing a predetermined operation to each means that has become operable by supplying power. When the preparation for performing the image forming operation is completed, a usable display and a display for accepting job reservation information input by the user during the image forming operation are output to the operation display unit of the image forming apparatus A.

  FIG. 4A is a diagram showing a display screen for a reserved job that has been set, and FIG. 4B is a diagram showing a display screen for a pending job.

  On the touch panel of the operation display means 8, as shown in FIG. 4A, reserved jobs are arranged in the order of execution. To hold a job to be specified from among these jobs, first touch the display image position of the job to be held displayed on the touch panel to specify the job, and then hold the job displayed on the right side. I press the button.

  As a result of the above operation, the designated job is moved from the reserved job file in which the reserved jobs are sequentially stored to the reserved job file in which the reserved jobs are sequentially stored. The queue of pending jobs is displayed. When a held job is registered again as a reserved job in the reserved job file, the job to be released from the hold is designated and the right hold release button is pressed.

  A plurality of users reserve a plurality of jobs in the image forming system as described above, and the image forming system sequentially executes the plurality of reserved jobs. However, when all the reserved jobs are processed, all the reserved jobs are finished, and the user who has determined that there is no job to be processed for a while is operated even though there is a pending job. The second power switch D4 in the vicinity of the display means may be turned off.

  In such a case, the held job file returns to the initial state, and a new reservation setting for executing the held job is necessary, or the second power switch D4 is turned on again to turn on the system. The inconvenience of having to start up may occur.

  The present invention has been made to avoid such inconvenience, and provides an image forming apparatus A having a control unit that uses the operation unit 8 to alert the user and instruct a necessary operation. is there.

  FIG. 5 is a flowchart showing a control flow when the second power switch D4 is turned off.

  When the second power switch D4 is turned off by the user (step S1: Y), the hold job file storing the hold jobs in turn is referred to, and it is confirmed whether there is a hold job. This is done (step S2). If there is no pending job (step S2: N), the control means C1 issues power-off instruction information to the power supply control means D3 (step S9). Receiving the instruction information, the power supply control means D3 turns off the power supply from the power supply conversion means D2 to each load except for the control means C1.

If it is confirmed that there is a pending job (step S2: Y),
Power-on instruction information is output to the power control means D3, and the power supply from the power conversion means D2 to each load continues to be on (step S3).

  Further, on the display screen of the operation display means 8, a display for informing the user that there is a job being held is output. At the same time, the display screen indicates to the user that “the power supply from the power conversion means D2 to the load is turned off without executing the suspended job” or “the second time again. A display prompting selection of “turn on power switch D4 and execute this job” is also output (step S4).

  When the user presses a predetermined position on the touch panel of the operation display unit 8 to select “turn off the power supply from the power conversion unit D2 to each load without executing the held job” (Step S5: Y), the control means C1 confirming this information sends power-off instruction information to the power supply control means D3 (Step S9). If “Select the second power switch D4 to be turned on again and execute this job” is selected, the message “Turn off the second power switch D4 that has been turned off again” is operated. It is displayed on the display means 8 (step S6).

  When the user turns on the second power switch D4 (step S7: Y), the switching of the switch is confirmed, and the display screen of the operation display means 8 is displayed before the second power switch D4 is turned off. (Step S8). The user can move the held job file to the reserved job file and execute it.

  By controlling as described above, it is possible to prevent the inconvenience of turning off the power switch of the image forming apparatus while leaving the hold job to be executed.

1 is a conceptual diagram of an image forming system including an image forming apparatus and peripheral devices. FIG. 2 is a block diagram illustrating a control relationship between an image forming apparatus and peripheral devices. It is a block diagram which shows the electric power supply path of a power supply device, and control relation. It is a figure which shows a display screen. It is a flowchart which shows the flow of control when a 2nd power switch is turned off.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Document reading means 2 Image writing means 3 Image forming means 4 Fixing means 5 Reversing means 6 Refeeding means 7 Paper feeding means 8 Operation display means A Image forming apparatus C1 Control means (image forming apparatus)
D power supply D1 first power switch D2 power conversion means D3 power control means D4 second power switch M memory T1, T2, T3, T4 communication means ADF automatic document feeder FIN post-processing device LCT large capacity paper feed tray

Claims (6)

An operation display means capable of setting a plurality of jobs to be reserved in a job file and a setting to hold execution of a specified job in a hold job file;
A power supply device that receives power from a commercial power supply and supplies power of a predetermined specification to each load, and includes a power supply control unit that controls on / off of power supply to each load;
A first power switch provided between a commercial power supply and the power supply device;
Control means for sending, to the power supply control means, first instruction information for instructing on / off of power supplied from the power supply device to each load;
A second power switch for sending to the control means second instruction information for instructing on / off of power supplied from the power supply device to each load;
In an image forming apparatus having
When the second power switch outputs second instruction information for turning off the power,
The control means includes
Determine whether there are any jobs held in the hold job file,
If there is no held job, the first instruction information for turning off the power supplied to each load from the power supply device is sent to the power supply control means,
If there are pending jobs,
An image forming apparatus, wherein the first instruction information for continuing the ON state is sent to the power supply control means. The control means includes
While sending the first instruction information to continue the ON state to the power supply control means,
An indication to inform the user that there is a pending job,
The image forming apparatus according to claim 1, wherein a display prompting the user to select whether or not to execute a held job is output to the operation display unit. The control means includes
When execution of a held job is selected, it is confirmed that the second power switch has been switched from OFF to ON, and the display of the operation display means is displayed by the second power switch. To return to the state just before it was switched off,
When it is selected not to execute the held job, the confirmation information input by the operation display unit is confirmed, and first instruction information for turning off the power supplied to each load is displayed as the power source. The image forming apparatus according to claim 2, wherein the image forming apparatus is sent to a control unit. An operation display means capable of setting a plurality of jobs to be reserved in a job file and a setting to hold execution of a specified job in a hold job file;
A power supply device that receives power from a commercial power supply and supplies power of a predetermined specification to each load, and includes a power supply control unit that controls on / off of power supply to each load;
A first power switch provided between a commercial power supply and the power supply device;
Control means for sending, to the power supply control means, first instruction information for instructing on / off of power supplied from the power supply device to each load;
A second power switch for sending to the control means second instruction information for instructing on / off of power supplied from the power supply device to each load;
In an image forming apparatus control method comprising:
When the second power switch outputs second instruction information for turning off the power,
Determine whether there are any jobs held in the hold job file,
If there is no held job, the first instruction information for turning off the power supplied to each load from the power supply device is sent to the power supply control means,
If there are pending jobs,
A control method for an image forming apparatus, characterized in that control is performed so that first instruction information for continuing an on state is sent to the power supply control means. While sending the first instruction information to continue the ON state to the power supply control means,
An indication to inform the user that there is a pending job,
5. The method of controlling an image forming apparatus according to claim 4, wherein control is performed so that a display prompting a user to select whether or not to execute a held job is output to the operation display unit. When execution of a held job is selected, it is confirmed that the second power switch has been switched from OFF to ON, and the display of the operation display means is displayed by the second power switch. To return to the state just before it was switched off,
When a selection is made not to execute a held job, confirmation information input by the operation display means is confirmed, and first instruction information for turning off the power supplied to each load is displayed as the power supply. 6. The method of controlling an image forming apparatus according to claim 5, wherein control is performed so that the image is sent to a control unit.

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