JP2004133037A - Image forming apparatus and information processing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus and information processing method which prevent the effects of noise resulting from an output of each high voltage power source and the effects of noise caused when discharge occurs from a recording medium stripped and charged in the course of the running of the medium, and which correctly read and write information. <P>SOLUTION: After power supply is stopped from the high voltage power sources to a charger, a development unit, and a transfer unit (reference to a charging output VPr, a development output VDv, a transfer output VTr), access to a nonvolatile storage element which stores the status information of the apparatus (reference to read data signal) is enabled. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus using an electrophotographic process, wherein a non-volatile storage medium (hereinafter, referred to as an EEPROM) is replaced by a unit obtained by uniting the apparatus and replacement parts such as a photosensitive drum, a charger, a developing unit, and a transfer unit. (Hereinafter referred to as a cartridge), and stores the state information of the apparatus and the cartridge, and reads out the stored information after restarting or exchanging the cartridge, thereby performing an optimal process at the time of image formation.
[0002]
[Prior art]
FIG. 9 is a sectional view showing an example of this type of image forming apparatus (in the case of a laser beam printer), and FIG. 10 is a block diagram of an electric circuit thereof.
[0003]
In FIG. 9, reference numeral 100 denotes a controller unit. The video controller 103 develops an electrical signal, which is code data input from a host computer (not shown), into a dot image and stores it in a memory inside the video controller 103. As a video signal. Each element of the engine unit 102 is controlled by the engine controller 105, and exchange of video signals with the controller unit 100 is also performed via the engine controller 105.
[0004]
A video signal input to a video interface unit (not shown) of the engine controller 105 is sent to a laser driver 106, where ON / OFF of a semiconductor laser 107 is controlled. The laser light 110 emitted from the semiconductor laser 107 is deflected by the polygon mirror 108 to become scanning light in the longitudinal direction of the photosensitive drum 112, and is projected on the photosensitive drum 112 via the mirror 109. The photosensitive drum 112 rotates in the direction of the arrow and is temporarily charged by the primary charger 111, and then receives an exposure corresponding to ON / OFF of the laser beam, so that an electrostatic latent image is formed on the surface of the photosensitive drum 112. Then, after colored toner particles (hereinafter, referred to as toner) are applied by the developing device 113 and a visualized image is obtained, the recording is taken out one by one from the paper feeding cassette 120 by the transfer charging device 114 by the paper feeding roller 121. The visible image is transferred to a medium. The transfer residual toner is wiped off from the surface of the photosensitive drum 112 by the cleaning device 115, and the photosensitive drum 112 prepares for the next image forming process.
[0005]
On the other hand, the recording medium on which the unfixed toner image is placed is inserted into the fixing device 116, and after a permanent fixed image is obtained, the recording medium is discharged out of the apparatus as a final print in the direction of the arrow in FIG. The arrows in the drawing indicate the feeding trajectory of the recording medium taken out of the paper feed cassette 120 and conveyed.
[0006]
The fixing device 116 has a heater (fixing heater) 119 in the hollow fixing roller 117. When the heater 119 is energized, the fixing roller 117 is heated, and a sensor (not shown) for detecting the surface temperature of the fixing roller 117 is provided. The output is input to a temperature controller (not shown), and the heater 119 is turned on / off to maintain a predetermined surface temperature. The pressing roller 118 is pressed against the fixing roller 117 by an urging means (not shown), and the unfixed toner on the recording medium is heated and heated together with the recording medium in a nip formed by the fixing roller 117 and the pressing roller 118. Pressed and permanently fixed.
[0007]
The photosensitive drum 112, the primary charging device 111, the developing device 113, the cleaning device 115, and the second EEPROM 131 constitute a cartridge 130 as a unit. The second EEPROM 131 stores information on the cartridge 130 (for example, date and time of manufacture, number of sheets passed, operation time, toner consumption, etc.) and is used to optimize high-voltage output conditions during image formation.
[0008]
[Problems to be solved by the invention]
As shown in FIG. 11, while the high-voltage power supply is being output, noise may also be generated on the power supply line Vcc3 of the EEPROM 131, causing a problem when writing or reading a series of setting information of the apparatus to or from the second EEPROM 131 in the cartridge. May occur. Since a problem such as inability to write or read information occurs and the image forming process cannot be optimized, an image cannot be correctly output to a recording medium.
[0009]
In particular, when the cable from the engine controller 105 to the EEPROM 131 of the cartridge is long, the cable is easily affected by noise.
[0010]
Noise may be generated due to a scratch on the roll surface of the developing device 113, the charging device 111, and the transfer device 114 to which a high voltage is applied or a scratch on the surface of the photosensitive drum 112. In addition, noise is generated due to a contact failure between the shaft, the bearing portion, and the peripheral contact portion of each roll. Noise is also generated when opening and closing the contacts of each roll.
[0011]
When a recording medium (paper or the like) is taken out one by one and fed, the recording medium is peeled and charged, and the charged charge is discharged to the rolls constituting the sheet feeding unit and the conveying unit. When this discharge occurs, noise is generated.
[0012]
The present invention has been made under such a circumstance, and it is desirable to eliminate the effects of noise associated with each output of a high-voltage power supply and noise generated when discharging from a recording medium that has been peeled and charged during conveyance. It is an object of the present invention to provide an image forming apparatus and an information processing method capable of reading and writing information correctly.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, the image forming apparatus is configured as in the following (1) to (13), and the information processing method in the image forming apparatus is as in the following (14) to (16). Constitute.
[0014]
(1) a high-voltage power supply for image formation;
A non-volatile storage medium for storing device status information;
When performing access to the non-volatile storage medium, control means for controlling so as to access after stopping the power supply by the high-voltage power supply,
An image forming apparatus comprising:
[0015]
(2) a non-volatile storage medium for storing status information of the device;
A cartridge having a photosensitive drum, a developing device, a charging device, a transfer device and the non-volatile storage medium;
A high-voltage power supply for the developing device, the charging device, and the transfer device;
When performing access to the non-volatile storage medium, control means for controlling so as to access after stopping the power supply from the high-voltage power supply,
An image forming apparatus comprising:
[0016]
(3) a high-voltage power supply for image formation;
A non-volatile storage medium for storing device status information;
A switch provided on a power supply line of the high-voltage power supply,
When accessing the non-volatile storage medium, control means for controlling to access after opening the switch,
An image forming apparatus comprising:
[0017]
(4) a high-voltage power supply for image formation;
A non-volatile storage medium for storing device status information;
A first switch provided on a power supply line of the high-voltage power supply,
A second switch provided on a power supply line of the nonvolatile storage medium,
Driving means for driving the first switch and the second switch so that the open / close states thereof are opposite to each other,
When accessing the non-volatile storage medium, control means for controlling the driving means to open the first switch and close the second switch and then to access the non-volatile storage medium. When,
An image forming apparatus comprising:
[0018]
(5) a drive motor for driving the conveyance of the recording medium;
A power supply for energizing the drive motor;
A non-volatile storage medium for storing device status information;
When performing access to the non-volatile storage medium, control means for controlling so as to access after stopping the power supply by the power supply,
An image forming apparatus comprising:
[0019]
(6) a drive motor for driving the conveyance of the recording medium;
A power supply for energizing the drive motor;
A non-volatile storage medium for storing device status information;
A switch provided on a power supply line of the power supply,
When accessing the non-volatile storage medium, control means for controlling to access after opening the switch,
An image forming apparatus comprising:
[0020]
(7) a drive motor for driving the conveyance of the recording medium;
A power supply for energizing the drive motor;
A non-volatile storage medium for storing device status information;
A third switch provided on a power supply line of the power supply,
A second switch provided on a power supply line of the nonvolatile storage medium,
Driving means for driving the third switch and the second switch so that the open / close states thereof are opposite to each other,
When accessing the non-volatile storage medium, control means for controlling the drive means to open the third switch, close the second switch, and then perform access. When,
An image forming apparatus comprising:
[0021]
(8) a high-voltage power supply for image formation;
A drive motor for driving the conveyance of the recording medium,
A power supply for energizing the drive motor;
A non-volatile storage medium for storing device status information;
When accessing the non-volatile storage medium, control means for controlling the high-voltage power supply and the power supply by the power supply to access after stopping,
An image forming apparatus comprising:
[0022]
(9) a high-voltage power supply for image formation;
A drive motor for driving the conveyance of the recording medium,
A power supply for energizing the drive motor;
A non-volatile storage medium for storing device status information;
A first switch provided in the high-voltage power supply line,
A third switch provided on a power supply line of the power supply,
When performing access to the non-volatile storage medium, control means for controlling to perform access after opening the first switch and the third switch,
An image forming apparatus comprising:
[0023]
(10) a high-voltage power supply for image formation;
A drive motor for driving the conveyance of the recording medium,
A power supply for energizing the drive motor;
A non-volatile storage medium for storing device status information;
A first switch provided in the high-voltage power supply line,
A third switch provided on a power supply line of the power supply,
A second switch provided on a power supply line of the nonvolatile medium,
When performing access to the non-volatile storage medium, the first switch and the third switch is opened, control means for controlling to access after closing the second switch, ,
An image forming apparatus comprising:
[0024]
(11) In the image forming apparatus according to any one of (3), (4), (6), (7), and (9),
The image forming apparatus, wherein the switch is configured by a semiconductor circuit.
[0025]
(12) In the image forming apparatus according to any one of (3), (4), (6), (7), and (9),
The image forming apparatus, wherein the switch is configured by a relay circuit.
[0026]
(13) In the image forming apparatus according to any one of (1) and (3) to (12),
An image forming apparatus, wherein the non-volatile storage medium is a non-volatile storage medium provided on a cartridge having a photoconductor and / or a non-volatile storage medium provided outside the cartridge.
[0027]
(14) An information processing method in an image forming apparatus including a high-voltage power supply for image formation and a non-volatile storage medium for storing state information of the apparatus,
Step A of stopping power supply by the high-voltage power supply;
A step B of accessing the nonvolatile storage medium after the execution of the step A;
An information processing method in an image forming apparatus provided with:
[0028]
(15) An information processing method in an image forming apparatus, comprising: a driving motor for driving the conveyance of a recording medium; a power supply for energizing the driving motor; and a non-volatile storage medium for storing state information of the apparatus.
Step C of stopping power supply by the power source;
A step D of accessing the nonvolatile storage medium after the execution of the step C;
An information processing method in an image forming apparatus provided with:
[0029]
(16) An image forming apparatus including a high-voltage power supply for image formation, a drive motor for driving the conveyance of a recording medium, a power supply for energizing the drive motor, and a non-volatile storage medium for storing state information of the apparatus. An information processing method in an apparatus,
Step E of stopping power supply by the high-voltage power supply and the power supply;
A step F of accessing the nonvolatile storage medium after the execution of the step E;
An information processing method in an image forming apparatus provided with:
[0030]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to examples of an image forming apparatus. The present invention is not limited to the form of the apparatus, but can be implemented in the form of a method, supported by the description of the embodiments.
[0031]
【Example】
(Example 1)
FIG. 1 is a block diagram illustrating a relationship between an engine controller, a high-voltage power supply, a cartridge, a low-voltage power supply, and a switch of the “image forming apparatus” according to the first embodiment. FIG. 2 is a block diagram of the electric circuit, and is a block diagram showing the relationship between the cartridge 130 including the photosensitive drum 112, the developing device 113, the primary charger 111, the cleaner 115, and the second EEPROM 131, and the image forming apparatus. is there. FIG. 3 is a timing chart when reading is performed to the EEPROM 131 after the power supply line of the high-voltage power supply is turned off.
[0032]
In FIG. 3, a high-voltage power switch signal HVSW that controls a switch that opens and closes a power line of a high-voltage power supply, a power supply voltage Vcc2 supplied to the high-voltage power supply, a charged output VPr of an output voltage of the high-voltage power supply, a development output VDv, a transfer output VTr, The relation between the power supply voltage Vcc1 supplied to the microcomputer (CPU) of the engine controller 105, the read clock of the EEPROM 131 built in the cartridge, the read data signal, and the power supply voltage Vcc3 is shown. The reading of the EEPROM 131 is composed of four blocks of an address, a password, an ID, and data.
[0033]
A sequence for stopping high-voltage output and reading information from the EEPROM 131 of the cartridge will be described.
[0034]
The high-voltage power switch signal HVSW (see FIG. 1) output from the I / O port of the CPU 105a is controlled to a high level by a program stored in the ROM 105c of the engine controller 105 to supply power to the high-voltage power supply 10. When the HVSW signal goes high, the transistor Tr2 that constitutes the switch 200 is turned on, and a current flows from the collector to the emitter. A current flows from the collector of the transistor Tr2 to the base of the transistor Tr1 connected via the resistor R1, and the transistor Tr1 turns on. The power supply line connected from the low-voltage power supply 4 to the high-voltage power supply 10 is energized, and a voltage of Vcc2 is supplied.
[0035]
The engine controller 105 controls each high-voltage output (charging VPr, development VDv, transfer VTr) by a control signal connected to the high-voltage power supply 10.
[0036]
Due to this high voltage output, noise is applied to the power supply line Vcc3 of the EEPROM 131 of the cartridge. If the EEPROM 131 is accessed (read, written) with noise, correct information cannot be exchanged, and the engine controller 105 does not access the EEPROM 131.
[0037]
The engine controller 105 sets the high-voltage power switch signal HVSW to a low level in order to stop the power supplied to the high-voltage power supply 10. When the high-voltage power switch signal HVSW becomes Low level, the transistor Tr2 of the switch 200 is turned off to cut off the current flowing through the resistor R1 connected between the transistors Tr2 and Tr1. Since the current flowing to the base of the transistor Tr1 is cut off, the transistor Tr1 is turned off, and the voltage of Vcc2 also drops to 0V. Since the power supply Vcc2 supplied to the high-voltage power supply 10 becomes 0V, each high-voltage output (charging VPr, development VDv, transfer VTr) also becomes 0V.
[0038]
Since each high-voltage output becomes 0 V, a noise component superimposed on the power supply line Vcc3 of the EEPROM 131 due to the high-voltage output is also not superimposed and becomes a normal DC voltage. A read clock signal and a read data signal connected to a port of the CPU 105a of the engine controller 105 are controlled to read information from the EEPROM 131, and a write clock signal and a write data signal are controlled to store information.
[0039]
In this manner, as shown in FIG. 3, the power supply line Vcc3 of the EEPROM 131 can be accessed in a state where the noise component is not superimposed, and incorrect information is read or stored due to the influence of the noise of the power supply line Vcc3 of the EEPROM 131. And information can be read and stored correctly, so that the setting conditions at the time of image formation can be optimized.
[0040]
FIG. 4 is a diagram for explaining a state in which noise is generated in the charging voltage VPr in a state where the withstand voltage is reduced due to deterioration of the peripheral contact point of the primary charging roller 111 and the voltage does not exceed a predetermined voltage and the power supply voltage Vcc3 of the EEPROM 131. FIG. 5 is a timing chart showing a state where the voltage does not increase when the charging voltage exceeds a constant voltage on the negative side, and a portion indicated by a broken line portion of the waveform indicates a normal output voltage. However, since the output cannot exceed a certain voltage, the waveform in this period is in a clamped state. During the clamp period, a leakage current flows in a portion where the breakdown voltage is deteriorated, and noise is generated by the leakage current. The power supply voltage waveform of the EEPROM 131 indicates that noise occurs during this clamp period.
[0041]
As described above, according to the present embodiment, the output of the high-voltage power supply is stopped by the function of disconnecting the power supply line of the high-voltage power supply, and then the EEPROM of the cartridge is accessed. And information can be read and written correctly.
[0042]
(Example 2)
FIG. 5 is a block diagram illustrating an example of a switch using a relay in the “image forming apparatus” according to the second embodiment. Relay RL is connected to power supply line Vcc2 of high-voltage power supply 10. The high-voltage power switch signal HVSW is connected from the port of the CPU 105a of the engine controller 105 to the base of the transistor Tr3. The transistor Tr3 is connected to the coil of the relay RL and GND, and the other side of the coil of the relay RL is connected to the power supply line Vcc1.
[0043]
Note that the overall configuration of this embodiment is the same as that of the first embodiment, and the description thereof will be referred to.
[0044]
The operation when turning on the power supply line Vcc2 of the high-voltage power supply will be described. The control program of the engine controller 105 turns on the port of the high-voltage power supply switch signal HVSW of the CPU 105a to set it to the High level. The base of the transistor Tr3 of the switch 200-1 becomes High level, the transistor Tr3 is turned on, and a current flows from the collector to the emitter. Since the collector of the transistor Tr3 is connected to the coil of the relay RL, current flows from the power supply Vcc1 connected to the opposite side of the coil of the relay RL to the coil, and the contact of the relay is closed by electromagnetic force. The low-voltage power supply 4 connected to the contact side of the relay RL and the Vcc2 of the high-voltage power supply 10 are connected, and the voltage of Vcc2 increases. Since Vcc2 is supplied, it is possible to generate the output of the high voltage power supply.
[0045]
When the output of the high-voltage power supply 10 is stopped, the port of the high-voltage power supply switch signal HVSW is turned off to set it to the Low level. The transistor Tr3 is turned off to stop energizing the coil of the relay RL. Since the electromagnetic force of the coil disappears, the contact returns by the spring force and the contact opens. Since the contact on the Vcc2 line opens, Vcc2 becomes 0V. Since Vcc2 becomes 0V, each high-voltage output stops.
Thus, the power supply of the high voltage power supply 10 can be controlled using the relay circuit.
[0046]
In this embodiment, the same effects as those of the first embodiment can be obtained.
[0047]
(Example 3)
FIG. 6 is a block diagram illustrating a main configuration of an “image forming apparatus” according to the third embodiment. The engine controller 105-1, the low-voltage power supply 4, the high-voltage power supply 10, the cartridge 130, the first switch 200, It is a figure for explaining connection of two switches 201.
[0048]
The power supply Vcc1 is connected from the low-voltage power supply 4 to the engine controller 105-1, the power supply Vcc2 is connected to the high-voltage power supply 10 via the first switch 200, and the power supply Vcc3 is connected to the EEPROM 131 of the cartridge via the switch 201. Have been. A high-voltage power switch signal HVSW is connected to the first switch 200 and the inverter 202 from an I / O port of the CPU 105a of the engine controller 105-1. The output terminal of the inverter 202 is connected to the second switch 201.
[0049]
The first switch 200 and the second switch 201 are circuits having the same configuration as the switch 200 of the first embodiment, and each include a transistor Tr1 (Tr4), a resistor R1 (R2), and a transistor Tr2 (Tr5). Is done. The first switch 200 opens and closes by connecting to a power supply Vcc2 of a high-voltage power supply, and the second switch 201 opens and closes by connecting to a power supply Vcc3 of an EEPROM 131.
[0050]
Note that the overall configuration of this embodiment is the same as that of the first embodiment, and the description thereof will be referred to.
[0051]
FIG. 7 shows a high-voltage power switch signal HVSW, a high-voltage power supply voltage Vcc2, each high-voltage output (charging VPr, development VDv, transfer VTr), a power supply voltage Vcc of the engine controller 105-1, a read clock of the EEPROM 131, and read data of the EEPROM. FIG. 5 is a timing chart showing a relationship between signals and a power supply voltage Vcc3 of the EEPROM 131. The timing when the output is stopped from the state where each output is output from the high voltage power supply and the information is read from the EEPROM 131 is shown.
[0052]
In order to generate each output of the high-voltage power supply, the software of the engine controller 105-1 changes the high-voltage power supply switch signal HVSW of the port of the CPU 105a to High. When the HVSW signal becomes High, in the first switch 200, the transistors Tr1 and Tr2 are turned on and the voltage of Vcc2 rises as described in the first embodiment. On the other hand, since the high-voltage power switch signal HVSW is also connected to the inverter 202, when the input of the inverter goes high, the output goes low. Since the output signal / HVSW of the inverter 202 is connected to the second switch 201, the transistors Tr5 and Tr4 are turned off and the power supply Vcc3 supplied to the EEPROM 131 is turned off to 0V.
[0053]
Since the power supply Vcc2 is supplied to the high-voltage power supply, each high-voltage output (charging VPr, development VDv, transfer VTr) can be output. Each high-voltage output (charging VPr, development VDv, transfer VTr) is controlled by a signal output from the engine controller 105-1.
[0054]
In order to access the EEPROM 131, the high voltage power switch signal HVSW is set to Low, and the power Vcc2 supplied to the high voltage power is turned off. On the other hand, since the output signal / HVSW of the inverter becomes High level, the second switch is turned on to turn on the power supply voltage Vcc3 of the EEPROM. Thereafter, the engine controller 105-1 controls the clock signal and the read data signal to read information from the EEPROM 131. FIG. 7 shows the situation at this time.
[0055]
FIG. 8 is a timing chart showing an example of writing information to the EEPROM 131. Before writing information to the EEPROM 131, the engine controller 105-1 sets the high-voltage power switch signal HVSW to Low level, stops the power supply voltage Vcc2 supplied to the high-voltage power supply, turns on the power supply voltage Vcc3 of the EEPROM 131, and then writes the write clock. A write data signal is generated, and information is written to the EEPROM 131.
[0056]
In this manner, the same effects as in the first embodiment can be obtained in this embodiment.
[0057]
Although not described in the embodiment, a switch is connected to the power supply line of the drive motor to control the power supply line in the same way as the power supply line of the high-voltage power supply. By accessing the EEPROM while preventing the influence of noise, it is possible to correctly read and write information.
[0058]
Further, by simultaneously controlling the high-voltage power supply line and the power supply line of the drive motor to prevent the noise generated from the high-voltage power supply line and the noise generated at the time of conveyance, the EEPROM is accessed to correctly read and write information. It can be carried out.
[0059]
In the description of the embodiments and the like, the switch inserted in the power supply line of the high-voltage power supply and the drive motor power supply is opened to stop the power supply by the high-voltage power supply and the drive motor power supply. Alternatively, the power supply from each power supply may be stopped by disabling a switching element or the like that controls each power supply.
[0060]
【The invention's effect】
As described above, according to the present invention, each output of the high-voltage power supply is stopped before accessing the nonvolatile storage medium, so that the influence of noise due to each output of the high-voltage power supply can be eliminated, and information can be correctly read. , Writing can be performed.
[0061]
In addition, by controlling the power supply line of the drive motor in the same manner as the power supply line of the high-voltage power supply, it is possible to eliminate the influence of noise generated when discharging from the recording medium that has been peeled and charged during transport, and to correctly read and read information. Writing can be performed.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a main part of a first embodiment; FIG. 2 is a block diagram of an electric circuit; FIG. 3 is a timing chart showing a relationship between a high voltage power supply and reading from an EEPROM; FIG. FIG. 5 is a block diagram showing a main part configuration of the second embodiment. FIG. 6 is a block diagram showing a main part configuration of the third embodiment. FIG. 7 is a diagram showing a relation between a high-voltage power supply and EEPROM reading. FIG. 8 is a timing chart showing a relationship between a high-voltage power supply and EEPROM writing. FIG. 9 is a cross-sectional view showing a configuration of a conventional example. FIG. 10 is a block diagram of an electric circuit. FIG. Timing diagram showing the relationship
4 Low voltage power supply 105a CPU
105d first nonvolatile storage medium 131 second nonvolatile storage medium 200 first switch 201 second switch

Claims (16)

A high-voltage power supply for image formation;
A non-volatile storage medium for storing device status information;
When performing access to the non-volatile storage medium, control means for controlling so as to access after stopping the power supply by the high-voltage power supply,
An image forming apparatus comprising: A non-volatile storage medium for storing device status information;
A cartridge having a photosensitive drum, a developing device, a charging device, a transfer device and the non-volatile storage medium;
A high-voltage power supply for the developing device, the charging device, and the transfer device;
When performing access to the non-volatile storage medium, control means for controlling so as to access after stopping the power supply from the high-voltage power supply,
An image forming apparatus comprising: A high-voltage power supply for image formation;
A non-volatile storage medium for storing device status information;
A switch provided on a power supply line of the high-voltage power supply,
When accessing the non-volatile storage medium, control means for controlling to access after opening the switch,
An image forming apparatus comprising: A high-voltage power supply for image formation;
A non-volatile storage medium for storing device status information;
A first switch provided on a power supply line of the high-voltage power supply,
A second switch provided on a power supply line of the nonvolatile storage medium,
Driving means for driving the first switch and the second switch so that the open / close states thereof are opposite to each other,
When accessing the non-volatile storage medium, control means for controlling the driving means to open the first switch and close the second switch and then to access the non-volatile storage medium. When,
An image forming apparatus comprising: A drive motor for driving the conveyance of the recording medium,
A power supply for energizing the drive motor;
A non-volatile storage medium for storing device status information;
When performing access to the non-volatile storage medium, control means for controlling so as to access after stopping the power supply by the power supply,
An image forming apparatus comprising: A drive motor for driving the conveyance of the recording medium,
A power supply for energizing the drive motor;
A non-volatile storage medium for storing device status information;
A switch provided on a power supply line of the power supply,
When accessing the non-volatile storage medium, control means for controlling to access after opening the switch,
An image forming apparatus comprising: A drive motor for driving the conveyance of the recording medium,
A power supply for energizing the drive motor;
A non-volatile storage medium for storing device status information;
A third switch provided on a power supply line of the power supply,
A second switch provided on a power supply line of the nonvolatile storage medium,
Driving means for driving the third switch and the second switch so that the open / close states thereof are opposite to each other,
When accessing the non-volatile storage medium, control means for controlling the driving means to open the third switch, close the second switch, and then perform access. When,
An image forming apparatus comprising: A high-voltage power supply for image formation;
A drive motor for driving the conveyance of the recording medium,
A power supply for energizing the drive motor;
A non-volatile storage medium for storing device status information;
When accessing the non-volatile storage medium, control means for controlling the high-voltage power supply and the power supply by the power supply to access after stopping,
An image forming apparatus comprising: A high-voltage power supply for image formation;
A drive motor for driving the conveyance of the recording medium,
A power supply for energizing the drive motor;
A non-volatile storage medium for storing device status information;
A first switch provided in the high-voltage power supply line,
A third switch provided on a power supply line of the power supply,
When performing access to the non-volatile storage medium, control means for controlling to perform access after opening the first switch and the third switch,
An image forming apparatus comprising: A high-voltage power supply for image formation;
A drive motor for driving the conveyance of the recording medium,
A power supply for energizing the drive motor;
A non-volatile storage medium for storing device status information;
A first switch provided in the high-voltage power supply line,
A third switch provided on a power supply line of the power supply,
A second switch provided on a power supply line of the nonvolatile medium,
When performing access to the non-volatile storage medium, the first switch and the third switch is opened, control means for controlling to access after closing the second switch, ,
An image forming apparatus comprising: The image forming apparatus according to any one of claims 3, 4, 6, 7, and 9,
The image forming apparatus, wherein the switch is configured by a semiconductor circuit. The image forming apparatus according to any one of claims 3, 4, 6, 7, and 9,
The image forming apparatus, wherein the switch is configured by a relay circuit. An image forming apparatus according to any one of claims 1 and 3 to 12,
The image forming apparatus according to claim 1, wherein the non-volatile storage medium is a non-volatile storage medium provided in a cartridge having a photoconductor and / or a non-volatile storage medium provided outside the cartridge. An information processing method in an image forming apparatus, comprising: a high-voltage power supply for image formation; and a non-volatile storage medium for storing state information of the apparatus.
Step A of stopping power supply by the high-voltage power supply;
A step B of accessing the nonvolatile storage medium after the execution of the step A;
An information processing method in an image forming apparatus, comprising: An information processing method in an image forming apparatus, comprising: a drive motor that drives a conveyance of a recording medium; a power supply that energizes the drive motor; and a nonvolatile storage medium that stores state information of the apparatus.
Step C of stopping power supply by the power source;
A step D of accessing the nonvolatile storage medium after the execution of the step C;
An information processing method in an image forming apparatus, comprising: Information in an image forming apparatus including a high-voltage power supply for image formation, a drive motor for driving the conveyance of a recording medium, a power supply for energizing the drive motor, and a nonvolatile storage medium for storing state information of the apparatus Processing method,
Step E of stopping power supply by the high-voltage power supply and the power supply;
A step F of accessing the nonvolatile storage medium after the execution of the step E;
An information processing method in an image forming apparatus, comprising:

Images