JP6175884B2 - Power supply monitoring device, image processing device - Google Patents

Description

  The present invention relates to a power supply monitoring apparatus and an image processing apparatus.

  In a processing device that requires power, for example, an image processing device, by using the power storage device, the power consumption in the power saving mode (sometimes referred to as “sleep mode”) is set to 0 w. AC power supply from a power source (commercial power outlet) is not required (internal switch off). For this reason, it is possible to continue to maintain the sleep mode even if the power lead-in wire (AC cable on the image processing apparatus side) normally connected to the outlet is disconnected.

  On the other hand, when returning from the sleep mode to the normal mode (the internal switch is turned on), it is necessary to connect the AC cable on the image processing apparatus side to an outlet and take in power. In this case, for example, when a tap with an off-timer function is connected between the AC cable on the image processing apparatus side and the outlet, even if the apparent wiring is connected, power is not supplied to the image processing apparatus There is.

  Patent Document 1 proposes an AC cable disconnection detection method for an accessory device connected to a main device. In this patent document 1, it is determined whether an AC cable is disconnected or a control device malfunctions by detecting AC input to an attached device or DC output of LVPS (Low Voltage Power Supply). Notifies cable disconnection or device communication failure.

  Patent Document 2 proposes a method for detecting an AC cable disconnection by comparing an AC power source detection result with an open / closed state of a power switch.

  Further, Patent Document 3 proposes detecting an AC cable disconnection in a processing device that uses a power storage device in a sleep mode instead of an external power supply. In Patent Document 3, the AC cable disconnection is detected by detecting the DC output of the in-device LVPS after the initial return operation (for example, turning on the internal switch) in the sleep mode canceling operation. In other words, whether or not power is supplied from the AC cable is not constantly monitored, but detection of AC cable disconnection is performed in conjunction with the return operation.

JP 2010-262029 A JP 2012-196839 A JP 2011-205787 A

  An object of the present invention is to obtain a power supply monitoring device and an image processing device that can always check the power supply state from an external power source and can avoid an unexpected situation due to power non-supply.

According to the first aspect of the present invention, power is supplied from the main power supply unit through the power supply line, and the main control unit that controls the processing unit is operated under the control of the main control unit, and the power supply line is made conductive. And a change-over switch to be cut off, and determination means for determining whether electric power is supplied from a power source different from the main power supply unit, and whether power is supplied from the power supply line to a portion upstream of the changeover switch of the power supply line And after the supply of power from the main power supply unit is cut off by the changeover switch and the main control unit receives no power from the main power supply unit , the main control unit is returned according to a return instruction. A sub-control unit that receives power supply from the sub-power supply unit, and if the power from the main power supply unit is supplied as a result of the determination by the determination unit, the power consumption by the main power supply unit is reduced. Display on the display unit, If the power from the source unit is not supplied, a display control unit for displaying the information indicating that there is no power supply from the main power supply unit to the display unit,
have.

Invention of Claim 2 further has an electrical storage device which supplies electric power with respect to the said display part and the said display control part in the invention of the said Claim 1 , The said display part, the said display control part, And the said electrical storage device is covered with the independent housing | casing, and is unitized.

According to a third aspect of the present invention , the power supply monitoring apparatus according to the first or second aspect is provided, and the processing unit applies an image reading unit for reading a document image to a recording sheet based on the received information. An image forming unit that forms an image and a communication circuit unit that executes transmission and reception of image information via a communication network, and is selected from processing modes including scanning, copying, printing, facsimile transmission, and facsimile reception The image processing apparatus executes processing using at least one of the image reading unit, the image forming unit, and the facsimile communication circuit unit based on the type of processing mode.

According to the first and third aspects of the present invention, it is possible to constantly check the power supply state from the external power source, and to avoid an unexpected situation due to power non-supply.

According to invention of Claim 2 , a display part, a display control part, and an electrical storage device can be handled as a separate unit from the main body comprised by others.

1A and 1B are schematic views of an image processing apparatus according to the present embodiment, in which FIG. 1A shows a state where an outlet is connected, and FIG. 2B shows a state where an outlet is disconnected. FIG. 3 is an enlarged view around a UI in the image processing apparatus according to the present embodiment. It is a block diagram of the control system of the image processing apparatus which concerns on this Embodiment. FIG. 3 is a wiring diagram mainly using a power supply line in the image processing apparatus according to the present embodiment (current detection). It is a flowchart which shows the electric power supply monitoring control routine in a sub panel. It is a flowchart which shows the electric power supply state return control routine in a sub controller. It is a wiring diagram which made the electric power supply line the main in the image processing apparatus which concerns on a modification (voltage detection).

  FIG. 1 shows an image processing apparatus 10 according to the present embodiment.

  The image processing apparatus 10 includes an image forming unit 12 that forms an image on a recording sheet, an image reading unit 14 that reads an original image, and a facsimile communication control circuit 16. The image processing apparatus 10 includes a main controller 18. The image processing apparatus 10 controls the image forming unit 12, the image reading unit 14, and the facsimile communication control circuit 16. For example, image data of a document image read by the image reading unit 14 is primary. Or the read image data is sent to the image forming unit 12 or the facsimile communication control circuit 16. The image reading unit 14 is covered with the upper housing 10A, and the image forming unit 12, the facsimile communication control circuit 16, and the main controller 18 are covered with the lower housing 10B. A lower stage of the lower housing 10B is provided with a plurality of tray units 50 for storing recording paper.

  In addition, on the upper surface and the front of the upper casing 10A covering the image reading unit 14, processing operation (service) items including image reading processing, copying processing, image forming processing, and transmission / reception processing are instructed. A user interface 52 (hereinafter also referred to as “UI 52”) for instructing detailed setting of the operation and displaying the state of the image processing apparatus 10 is disposed. The UI 52 is provided with a touch panel unit 40 that can be instructed by touching an operator's finger or the like on the display screen, and a plurality of hard keys 54 that can be instructed by mechanical operation (for example, pressing operation).

  A sub panel 80 is provided so as to be adjacent to the touch panel unit 40. In the present embodiment, the sub-panel 80 functions as an independent user interface that does not belong to the UI 52.

  A network communication network 20 such as the Internet is connected to the main controller 18, and a telephone network 22 is connected to the facsimile communication control circuit 16. The main controller 18 is connected to a host computer via, for example, a network communication line network 20 and receives image data or performs facsimile reception and facsimile transmission using the telephone line network 22 via the facsimile communication control circuit 16. Has a role to play.

  The image reading unit 14 receives a document table for positioning the document, a scanning drive system that scans an image of the document placed on the document table and emits light, and light reflected or transmitted by scanning of the scan drive system. And a photoelectric conversion element such as a CCD for converting into an electrical signal.

  The image forming unit 12 includes a photoconductor. Around the photoconductor, a charging device that uniformly charges the photoconductor, a scanning exposure unit that scans a light beam based on image data, and the scanning exposure unit. An image developing unit that develops the electrostatic latent image formed by scanning exposure, a transfer unit that transfers the developed image on the photoreceptor to a recording sheet, and a surface of the photoreceptor after the transfer are cleaned. And a cleaning unit. A fixing unit for fixing the image on the recording paper after transfer is provided on the recording paper conveyance path.

  In the present embodiment, scanning, copying, printing, facsimile transmission, facsimile using the image forming unit 12, the image reading unit 14, and the facsimile communication control circuit 16 (hereinafter sometimes collectively referred to as “device”). Services (processing forms) including reception and printing after reception can be executed.

  An outlet 26 is attached to the tip of the input power line 24 in the image processing apparatus 10, and the image processing apparatus 10 is inserted into the wiring plate 32 of the commercial power supply 31 wired up to the wall surface W. The power supply is supplied from the commercial power source 31.

  1A shows a state where the outlet 26 is inserted into the wiring plate 32. In this case, the power of the commercial power supply 31 is supplied to the image processing apparatus 10. FIG. On the other hand, FIG. 1B shows a state in which the outlet 26 is not inserted into the wiring plate 32. In this case, the power of the commercial power supply 31 is not supplied to the image processing apparatus 10.

  Further, as shown in FIG. 1A, even when the outlet 26 is inserted into the wiring plate 32, for example, when a tap with an off timer function (including an extension cord) is interposed, the appearance is as shown in FIG. Even in the power supply state as in (A), power may not be supplied to the image processing apparatus 10.

  As shown in FIG. 2, the UI 52 installed in the upper housing 10A is provided on a plate 56 that is a separate member from the upper housing 10A. A touch panel unit 40 is disposed at the center of the plate 56. A plurality of hard keys 54A to 54E (generically referred to as hard keys 54 in FIG. 1) are exposed on the surfaces of the left and right plates 56 of FIG.

  The hard keys 54A to 54E are used to determine predetermined instruction information by a pressing operation, for example, a menu key 54A for transitioning the display screen of the touch panel unit 40 to a basic screen, and a copy key. A copy key 54B, a ten key 54C for designating the number of copies, inputting a recitation number, a power saving key 54D for instructing or canceling power saving, and a start key 54E for instructing execution of processing.

  Further, in the lower right of FIG. 2 of the plate 56, in the vicinity of the start key 54E, as an LED for monitoring, an LED 72A for displaying data transmission, an LED 72B for notifying an error occurrence, and an LED 72C for notifying the power-on. Is provided.

  On the other hand, a sub-panel 80 is provided on the left side of the plate 56 in FIG. In the present embodiment, the sub panel 80 is accommodated in a rectangular recess 57 provided in the upper housing 10A.

  The sub-panel 80 is provided with a display unit 88 on the surface of the cover member that covers the entire surface (as shown in FIG. 2, the upper surface when accommodated in the recessed portion 57).

  The sub-panel 80 may be fixed while being accommodated in the recessed portion 57, or may be detachable (see the imaginary line in FIG. 2). When the sub-panel 80 is detachable, the wiring system corresponding to the bus 33E that controls information communication with the image processing apparatus 10 and the signal line 100 for current monitoring (see FIGS. 2 and 3) may be wired. However, it may be wireless.

  The attachment position of the sub-panel 80 is not limited, and the sub-panel 80 may be attached to any one of the UI 52 including the upper housing 10A and the lower housing 10B. preferable. In addition, when the sub panel 80 has a detachable structure, a plurality of temporary installation locations may be provided.

  In the present embodiment, the reason why the sub panel 80 distinguishes the UI 52 from the sub panel 80 is that the power supply source is different. Even when the power supply to the UI 52 is cut off, Upon receiving the supply, it plays a role of notifying notification information.

  As shown in FIG. 3, the sub-panel 80 is provided with a unique power storage device 82 and connected to the control unit 84 via the power supply line 35E. The power storage device 82 is charged by solar power generation by the solar panel 86.

  The sub panel 80 is provided with a display unit 88 that operates under the control of the control unit 84.

  Note that the display unit 88 uses a liquid crystal display device that does not have a backlight and has a minimum power consumption that can be conceived at present. However, depending on the amount of power stored in the power storage device 82 or the power generation capability of the solar panel 86, the backlight may be turned on. It may be a display unit 88 or an LED display unit. Furthermore, it is good also as a touchscreen type provided with the operation function.

  As described above, the sub-panel 80 does not receive power supply from the image processing apparatus 10, operates with power received from an independent power source (power storage device 82), and receives operation information (for example, received from the main controller 18 via the bus 33E). It functions as an information display device that displays notification information (mainly power value information) on the display unit 88 based on execution information and operation mode (state) information for each device.

(Control system of image processing device)
FIG. 3 is a schematic diagram of the hardware configuration of the control system of the image processing apparatus 10.

  The network line network 20 is connected to the main controller 18 of the image processing apparatus 10. The network communication line network 20 is connected to a PC (terminal device) 29 that can be a transmission source of image data.

  The main controller 18 is connected to the facsimile communication control circuit 16, the image reading unit 14, the image forming unit 12, and the UI 52 via buses 33A to 33D such as a data bus and a control bus. That is, each processing unit of the image processing apparatus 10 is controlled mainly by the main controller 18.

  Further, the main controller 18 of the present embodiment is connected to the control unit 84 of the sub panel 80 via the bus 33E.

  The image processing apparatus 10 includes a power supply device 42 and is connected to the main controller 18 by a signal harness 43.

  The power supply 42 is supplied with electric power from the commercial power supply 31 through the wiring plate 32 and the outlet 26 via the input power line 24.

  In the power supply device 42, power supply lines 35 </ b> A to 35 </ b> D that supply power independently to the main controller 18, the facsimile communication control circuit 16, the image reading unit 14, the image forming unit 12, and the UI 52 are provided. For this reason, the main controller 18 individually supplies power to each processing unit (device) (power supply mode) or restricts power supply (energy saving mode) to enable so-called partial power saving control.

  By the way, in a general energy saving mode, power supply to devices other than the main controller 18 is cut off, and the main controller 18 also waits for reception of information from the outside (network communication network 20 or telephone network 22). Power other than that required for the function is shut off. In this case, about 1.5 to 5 w is consumed as electric power.

  On the other hand, in the present embodiment, as the energy saving mode, the “sleep 0” mode that basically cuts off the power supply to the main controller 18 is set.

  “Basically shutting off power supply” means that the main controller 18 does not receive any power from the commercial power supply 31 (power supply device 42), but the information reception standby function from the outside, and the “sleep 0” mode state. In order to return to the normal mode state from the power source, it means that power is supplied from a sub power source unit different from the power source device 42 as the main power source unit. The power consumption in the “sleep 0” mode is 0.1 w or less compared to the general power consumption (1.5 w to 5 w), and the energy saving performance is extended. The display unit 88 of the sub-panel 80 can display the power consumption during the “sleep 0” mode as one piece of notification information.

  Here, in this Embodiment, the electric power display on the display part 88 is made into 1w unit. Accordingly, the power consumption of less than 1 w is displayed as “0 w” during the “sleep 0” mode.

  The image processing apparatus 10 according to the present embodiment is equipped with a leakage breaker 102 (see FIG. 4). For this reason, when the outlet 26 is connected to the wiring plate 32 and the input power line 24 and the commercial power supply 31 are in a conductive state, a current flows through the leakage breaker 102 and power of about 10 mw (0.01 w) is consumed. There is a case. Such power consumption of less than 1 w can be processed as an error range as compared with the maximum power consumption (1300 w at the time of image formation) in the image processing apparatus 10, for example.

  As shown in FIG. 3, in the present embodiment, a power supply system using photovoltaic power generation is applied as a sub power supply unit for supplying power to the main controller 18 during the “sleep 0” mode period. Yes.

  In other words, the solar panel 92 is installed in the image processing apparatus 10. For example, the solar panel 92 may be attached to all or part of the surface of the upper housing 10A or the lower housing 10B (see FIG. 1), or may be disposed away from the image processing apparatus 10. .

  The solar panel 92 is connected to the power storage device 96 via a dedicated wiring 94. The power charged in the power storage device 96 can be sent to the main controller 18 via the power supply line 98.

  The main controller 18 is provided with a power switching unit 18A and a sub controller 18S. In the power supply switching unit 18A, the power supply source is switched to the power supply device 42 (main power supply unit) in the normal mode, and is switched to the power storage device 96 (sub power supply unit) in the “sleep 0” mode. Although details will be described later, as shown in FIG. 4, in the “sleep 0” mode, the 0w switch 104 interposed in the input power supply line 24 is turned off, so that the main power switch 106 is in the on state. The power from the commercial power supply 31 is not input to the LVPS 108.

  The sub-controller 18S is a part of the function of the main controller 18. The sub-controller 18S is activated during the “sleep 0” mode period, monitors the operation state of the power saving key, waits for information reception from the outside, and “sleep”. The program for returning from the “0” mode state to the normal mode state is executed.

  The sub controller 18S may be provided separately from the main controller 18.

  FIG. 4 is a circuit diagram mainly showing wiring for supplying power to the main controller 18 in the image processing apparatus 10 of the present embodiment.

  The other end of the input power line 24 having the outlet 26 attached to one end is connected to the leakage breaker 102. That is, the earth leakage breaker 102 is connected to the upstream side of the main power switch 106.

  The leakage breaker 102 monitors the leakage of the power wiring in the image processing apparatus 10. If there is a leakage, the power supply is cut off at the most input end of the image processing apparatus 10.

  The main power switch 106 serves to turn on the power from the commercial power supply 31 to the image processing apparatus 10 at the user's will. The main power switch 106 is connected to the LVPS 108 via the 0w switch 104.

  The 0w switch 104 is a switch that is turned on / off based on an instruction signal from the main controller 18 and that is turned on / off by software. When shifting from the normal mode to the “sleep 0” mode, the 0w switch 104 is turned off, and power is supplied from the power storage device 96 to the sub-controller 18S by switching the contact of the power supply switching unit 18A. ing.

(Power shutdown notification function)
Here, in the present embodiment, the current detection device 110 is attached to the input power line 24 that is further upstream than the leakage breaker 102. In the current detection device 110, the coil unit 110 </ b> A is arranged around the input power supply line 24, and measures the current flowing through the input power supply line 24 based on the relationship between the current and the magnetic field.

  The current detection device 110 is configured to send a measurement value signal to the control unit 84 of the sub-panel 80 via the signal line 100. In the sub panel 80, the measurement value signal is constantly monitored.

  The control unit 84 of the sub-panel 80 generates a binary signal that becomes an H signal when current is flowing and an L signal when current is not flowing.

  Here, when the H signal is generated, the power value in the “sleep 0” mode (“0 w” or “0.01 w” in the case of higher accuracy) is displayed.

  On the other hand, when the L signal is generated, the power consumption is calculated based on the acquired current value.

  Moreover, in the said monitoring, when L signal is produced | generated, it is in the state by which the electric power is not supplied also to the earth leakage circuit breaker 102. FIG. For example, it is predicted that the power supply from the input power line 24 to the earth leakage breaker 102 is cut off because the outlet 26 is disconnected or the time is up with a tap with an off timer function. The

  Therefore, in the control unit 84 of the sub-panel 80, when the L signal is generated, the display unit 88 is notified that the input from the commercial power supply 31 (AC input) is cut off (for example, “the power input is cut off”). ”,“ AC input is interrupted ”,“ Check outlet etc. ”etc.).

(Return limit function)
Further, in the “sleep 0” mode, the sub controller 18S that receives power from the power storage device 96 as a sub power source and mainly monitors the trigger of the return instruction, for example, performs a return instruction operation of the power saving key 54D by the user. Then, a return operation for recovering all the functions of the main controller 18 is executed. At this time, since the power consumption rapidly increases, the power supply switching unit 18A switches the power supply system from the sub power supply to the main power supply.

  However, even when the main power source is switched, there is a case where the power for returning the main controller 18 cannot be secured in the situation where the outlet is disconnected as described above.

  Therefore, in the present embodiment, in the sub-controller 18S when returning from the “sleep 0” mode to the normal mode, signals (H signal, L signal) indicating whether or not power is supplied from the control unit 84 of the sub panel 80. Acquired to determine whether or not the commercial power supply 31 can be acquired.

  More specifically, when the sub-controller 18S receives an H signal from the control unit 84 of the sub-panel 80, it returns to the normal mode. On the other hand, when the sub controller 18S receives the L signal from the control unit 84 of the sub panel 80, the “sleep 0” mode is maintained.

  Hereinafter, the operation of the present embodiment will be described with reference to the flowcharts of FIGS.

  FIG. 5 is a flowchart showing a power supply monitoring control routine in the control unit 84 of the sub-panel 80.

  In step 150, a signal is acquired from the current detection device 110, and then the process proceeds to step 152 to generate an H signal / L signal based on the acquired current value. The H signal indicates that power is supplied, and the L signal indicates that power is not supplied.

  In the next step 154, the signal generated in step 152 is discriminated. If it is determined in step 154 that the signal is an H signal, it is determined that power from the commercial power supply 31 is supplied up to the 0w switch 104, and the process proceeds to step 156. In step 156, the power value is calculated from the current value, and then the process proceeds to step 158 to display the power value on the display unit 88 of the sub-panel 80, and the process returns to step 150.

  On the other hand, if it is determined in step 154 that the signal is an L signal, it is determined that power from the commercial power supply unit 31 is not supplied to the input power line 24, and the process proceeds to step 160.

  In step 160, the AC cut-off is notified to the display unit 88 of the sub-panel 80, and the process returns to step 150. The message may be “power input is cut off”, “AC input is cut off”, “check outlet etc.”, and the like.

  The user may unplug the outlet 26 for energy saving. If there is a return instruction when the outlet 26 is disconnected during the “sleep 0” mode, the main controller 18 may not return correctly due to insufficient power. In this embodiment, since the message is displayed on the display unit 88 of the sub-panel 80 as the cause, it is possible to notify the user that the outlet has been disconnected.

  FIG. 6 is a flowchart showing a power supply state return control routine in the sub-controller.

  In step 170, it is determined whether or not a return instruction has been issued. If a negative determination is made, this routine ends. Further, when an affirmative determination is made at step 170, the routine proceeds to step 172 where power is supplied to the main controller 18 to restore some functions. At this time, the power in the “sleep 0” mode is provided by the power from the power storage device 96.

  In the next step 174, it is determined whether or not the return instruction is return from the “sleep 0” mode.

  If a negative determination is made in step 174, it is determined that power is being supplied from the commercial power source 31 (for example, a normal energy saving mode or standby mode that operates with about 5w of power), and the process proceeds to step 176. The routine returns to execute normal return processing, and this routine ends.

  If an affirmative determination is made in step 174, it is determined that power is not supplied from the commercial power supply 31 (ie, “sleep 0” mode), the process proceeds to step 178, and the control unit 84 of the sub-panel 80 is determined. The power supply presence / absence signal (H signal / L signal) is acquired from step S180, and the process proceeds to step 180.

  In step 180, the type of signal is determined. If it is determined in step 180 that the signal is an H signal, it is determined that at least the upstream side of the 0w switch 104 has been supplied with power, and the process proceeds to step 182 to execute a sleep recovery process. In this sleep recovery process, first, the ON control of the 0w switch 104 is started, and then the power switching process in the power switching unit 18A is executed.

  If it is determined in step 180 that the signal is an L signal, it is determined that power is not supplied to the input power line 24, the process proceeds to step 184, and preparation for transition to the “sleep 0” mode is made. The routine is terminated after the power supply of the main controller 18 is cut off (partial function return is completed).

  As a result, the execution of the return process in the state where the power from the commercial power supply 31 is not supplied is avoided, so that it is possible to prevent problems such as program runaway and data loss due to power shortage in the main controller 18, for example. Is possible.

  In the present embodiment, the current detection device 110 supplies the current of the input power line 24 to the earth leakage breaker 102 mounted on the image processing device 10 by utilizing the fact that a current of about 10 mw flows even in the “sleep 0” mode. It is detected and it is determined that the commercial power supply 31 is not taken into the input power line 24 (hereinafter referred to as “power input shut-off”) due to the disconnection of the outlet or the off timer starting. As a result of this determination, the display unit 88 of the sub-panel 80 is notified of the “power input shut-off” state, and the normal mode return in the “power input shut-off” state is prohibited, and the main controller 18 runs out of control and the stored information is lost. I tried to prevent it.

  In the present embodiment, the leakage breaker 102 mounted on the image processing apparatus 10 utilizes the fact that a current of about 10 mw flows even in the “sleep 0” mode, but the leakage breaker 102 is not mounted. 7, as shown in FIG. 7, the input power supply line 24 is provided with a wiring 114 grounded via a resistor 112, a voltage between the resistors 112 is detected, and sent to the control unit 84 of the sub-panel 80. You may make it discriminate | determine whether it is a "power supply input interruption | blocking" state.

DESCRIPTION OF SYMBOLS 10 Image processing apparatus 10A Upper housing | casing 10B Lower housing 12 Image forming part 14 Image reading part 16 Facsimile communication control circuit 18 Main controller 18A Power supply switching part 18S Subcontroller 20 Network communication line network 22 Telephone line network 24 Input power line 26 Outlet 29 PC
31 Commercial Power Supply 32 Wiring Plate 33A-33E Bus 35A-35F Power Supply Line 40 Touch Panel Unit 42 Power Supply Device 43 Harness 52 User Interface (UI)
56 plate 54 hard key 54A menu key 54B copy key 54C numeric keypad 54D power saving key 54E start key 80 sub panel 82 power storage device 84 control unit 86 solar panel (for sub panel)
88 Display unit 92 Solar panel (for sub-controller)
94 Dedicated wiring 96 Power storage device 98 Power supply line 100 Signal line 102 Earth leakage breaker 104 0w switch 106 Main power switch 108 LVPS
110 Current detector 110A Coil part

Claims (3)

A main control unit that receives power from the main power supply unit via the power line and controls the processing unit;
A changeover switch that operates under the control of the main control unit, and conducts and cuts off the power supply line;
Discriminating means for discriminating whether electric power is supplied from a power source different from the main power supply unit, and whether electric power is supplied from the power source line to a portion upstream of the switch of the power source line;
After the supply of power from the main power supply unit is cut off by the changeover switch and the main control unit receives no power from the main power supply unit , the main control unit is returned according to a return instruction. A sub-control unit that receives power supply necessary for the sub-power source unit ,
When the power from the main power supply unit is supplied as a result of the determination by the determination unit, the power consumption by the main power supply unit is displayed on the display unit, and the power from the main power supply unit is not supplied A display control unit for displaying information indicating that there is no power supply from the main power supply unit on the display unit;
A power supply monitoring device. An electric storage device that supplies power to the display unit and the display control unit;
The power supply monitoring apparatus according to claim 1, wherein the display unit, the display control unit, and the power storage device are covered with an independent casing and unitized . The power supply monitoring device according to claim 1 or 2,
  The processing unit is
  An image reading unit for reading a document image, an image forming unit that forms an image on a recording sheet based on received information, and a communication circuit unit that transmits and receives image information via a communication network. At least one of the image reading unit, the image forming unit, and the facsimile communication circuit unit is used based on the type of processing mode selected from processing modes including scanning, copying, printing, facsimile transmission, and facsimile reception An image processing apparatus that executes processing.

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