JP2012171341A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer that easily restores backup data stored in a second circuit board by determining that only a first circuit board storing information such as a serial number of a print head has been replaced.SOLUTION: The printer that outputs video data to a plurality of print heads, and performs printing on a recording medium includes: the first circuit board having first and third storage means for storing specific information of the plurality of print heads; the second circuit board having a second storage means for storing the same information as the information stored in the first storage means; a determination means for determining that only the first circuit board has been replaced on the basis of the specific information of the print head stored in the third storage means; and a storage processing means for processing so that the specific information of the print head stored in the second storage means may be stored in the first storage means on the basis of the result redetermined by the determination means.

Description

  The present invention relates to a printing apparatus such as a printer apparatus.

  Today, printing devices such as printers store the serial number of the print head and the correction light quantity information of the printing elements that make up the print head, and are used for consumables, regular replacement parts, and other controls after shipment. A storage device storing necessary parameters is provided. As such a storage device, for example, a non-volatile memory provided on a printer control board is compatible.

  Further, the printer control board is used as a main board, and a sub board different from the main board is attached to the printing apparatus, and is used for backup for backing up the information stored in the storage device such as the nonvolatile memory. A storage device is provided.

  On the other hand, in Japanese Patent Laid-Open No. 2004-260688, print job and device-specific information is written to the nonvolatile memory by operating the operation panel, and then the information written to the nonvolatile memory is written to the nonvolatile memory of the engine control board via the engine I / F. An invention is disclosed in which information written in a non-volatile memory is stored together and information is backed up.

JP 2001-047694 A

  However, in a printing apparatus having a sub-board on the printer control board, even when only the main board is replaced, it cannot be determined which board has been replaced in relation to the sub-board. In addition, the image processing apparatus of Patent Document 1 is an invention in which information written in both nonvolatile memories is mutually saved and information is backed up, and both nonvolatile memories are not related to the main board and sub-board. I don't know if it is installed.

  Therefore, the present invention stores information such as the serial number of the print head on the main board, and in a printing apparatus in which a storage device for backing up the information is arranged on the sub board, even when only the main board is replaced. It is an object of the present invention to provide a printing apparatus capable of knowing replacement of a main board.

  According to the present invention, there is provided a printing apparatus that outputs video data to a plurality of print heads and performs print processing on a recording medium based on control of a print control unit, and stores specific information of the plurality of print heads. A first circuit board provided with first storage means and a second circuit board provided with second storage means for storing the same information as the information stored in the first storage means And further storing the print head specific information in a third storage means disposed on the first circuit board, and based on the print head specific information stored in the third storage means, Determination means for determining that only the first circuit board has been replaced, and print head specific information stored in the second storage means based on the determination result of the determination means in the first storage means A printing apparatus having storage processing means It can be achieved by.

  According to the present invention, there is provided a printing apparatus including a second circuit board that is a sub board that stores information stored in a first circuit board that is a main board, and only the first circuit board is replaced. In this case, it is possible to provide a printing apparatus that can easily determine replacement of the first circuit board and restore the backup data stored in the second circuit board to the storage unit of the first circuit board.

FIG. 3 is a circuit block diagram including a control device of the printer device. It is sectional drawing explaining the internal structure of the printer apparatus (printing apparatus) in this embodiment. FIG. 3 is a diagram illustrating a circuit board configuration of a control device in the printer device. It is a flowchart explaining the backup process of the data memorize | stored in EEPROM. 10 is a flowchart illustrating a processing operation for determining replacement of a printer control main board.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 2 is a cross-sectional view illustrating the internal configuration of the printer apparatus (printing apparatus) in the present embodiment. The printer apparatus 1 shown in FIG. 1 is an electrophotographic secondary transfer tandem color printer apparatus, and includes four image forming units 2, an intermediate transfer belt unit 3, a toner supply unit 4, a paper feeding unit 5, A belt-type fixing unit 6 and a duplex printing conveyance unit 7 are included.

  The image forming unit 2 is in contact with the lower running unit surface 8a of the transfer belt 8 of the transfer belt unit 3 and multi-stages four developing devices 9 (9m, 9c, 9y, 9k) from right to left in FIG. It consists of a side-by-side configuration. The image forming unit 2 is held by a frame of the main body of the printer apparatus 1 so that it can be moved up and down from the printing execution position shown in FIG. 2 to a maintenance position below it.

  Of the four developing devices 9, the three developing devices 9m, 9c, and 9y on the downstream side (the right side in the figure) are magenta (M), cyan (C), and yellow (Y ) Color toner is formed, and the developing device 9k forms a monochrome image using black (K) toner mainly used for dark portions of characters and images.

  Each of the developing devices 9 has the same configuration except for the color of the toner that develops the image. Therefore, the configuration of the developing device 9k for black (K) toner will be described below as an example.

  The developing device 9 includes a photosensitive drum 10 at the top. The photosensitive drum 10 has a peripheral surface made of, for example, an organic photoconductive material. A cleaner 11, a charging roller 12, an optical writing head 13, and a developing roller 15 of the developing device 14 are disposed around the periphery of the photosensitive drum 10.

  The developing device 14 includes a housing 16 that covers the outside, a partition wall 17 provided inside, a developing roller 15, a first stirring and conveying screw 18, and a second stirring and conveying screw 19. Although not specifically shown, the first and second agitating and conveying screws 18 and 19 include a screw shaft and a fin that is integrally formed with the screw shaft and rotates.

  The developing unit 14 includes a reserve tank, which will be described later in detail, and a magenta (M), cyan (C), yellow (Y), and magenta (M) as shown by M, C, Y, and K in FIG. Either black (K) toner is supplied.

  The transfer belt unit 3 has an endless transfer belt 8 that extends in the shape of a flat loop in the left-right direction in the figure at approximately the center of the main unit, and the transfer belt 8 is stretched over the transfer belt 8. A driving roller 21 and a driven roller 22 are provided to circulate and move counterclockwise as indicated by an arrow a in the figure.

  The above-described transfer belt 8 is directly transferred to the surface of the belt that circulates below by a primary transfer roller 20 that is integrated with the unit and pressed against the photosensitive drum 10 via the transfer belt 8 (primary transfer). Then, the toner image is conveyed to the secondary transfer unit 23 to the paper for further transfer (secondary transfer) to the paper.

  The transfer belt unit 3 is provided with a belt cleaner 24 having a cleaning blade that comes into contact with the surface of the drive roller 21. A waste toner collection container 25 is detachably disposed below the belt cleaner 24.

  In the belt cleaner 24, the cleaning blade comes into contact with the surface of the transfer belt 8 to scrape and remove the waste toner, and the waste toner is sent to a waste toner collection container 25 below by a conveying screw.

  The toner supply unit 4 includes four reserve tanks 26 (26m, 26c, 26y, and 26k) disposed above the upper running unit of the transfer belt 8, and is detachably disposed on the reserve tanks 26, respectively. And a toner cartridge 27 (27m, 27c, 27y, 27k) for toner replenishment.

  The four toner cartridges 27m, 27c, 27y, and 27k accommodate magenta (M), cyan (C), yellow (Y), and black (K) toners, respectively, and four reserve tanks 26 (26m, 26c). , 26y, and 26k) are replenished with toner from the toner cartridge 27 mounted thereon.

  These four reserve tanks 26 are hidden behind the opposite side of the transfer belt unit 3 in FIG. 2, but are connected to the corresponding developing devices 14 of the developing device 9 by toner supply paths.

  Although not particularly shown, the toner supply unit 4 is held on the frame of the main body of the printer 1 so as to be movable up and down from the printing execution position shown in FIG. 2 to a maintenance position above it.

  Two electrical parts 30 are disposed on the left side of the toner supply unit 4 from the left side of the belt cleaner 24 to above the drive roller 21. The electrical unit 30 includes a circuit board on which a control device composed of a plurality of electronic components, which will be described in detail later, is mounted.

  The paper feed unit 5 includes two paper feed cassettes 29 (29a, 29b) arranged in two upper and lower stages. A paper take-out roller 31, a feed roller 32, a separating roller 33, and a standby conveyance roller pair 34 are disposed in the vicinity of the paper feed opening (right side of the drawing) of the two paper feed cassettes 29, respectively.

  A secondary transfer roller 35 that is in pressure contact with the driven roller 22 via the transfer belt 8 is disposed in the paper transport direction (vertically upward in the drawing) of the standby transport roller pair 34, and the secondary transfer onto the paper described above. Part 23 is formed.

  A belt-type heat fixing unit 6 is disposed downstream (upward in the drawing) of the secondary transfer portion. On the further downstream side of the belt-type heat fixing unit 6, a pair of carry-out rollers 36 for carrying out the fixed paper from the belt-type heat fixing unit 6, and a paper discharge tray 37 formed on the upper surface of the apparatus. A paper discharge roller pair 38 for paper discharge is provided.

  The conveyance unit 7 for double-sided printing also serves as an opening / closing member whose outer surface (right outer surface in the drawing) opens or shields the inside of the printer apparatus 1 from the side surface to the outside.

  This duplex printing transport unit 7 has a start return path 39a that branches rightward in the figure from just before the paper discharge roller pair 38, an intermediate return path 39b that bends downward, and a left lateral direction opposite to the above. Thus, a return path 39 including a terminal return path 39c for finally inverting the return sheet is provided.

In the middle of the return path 39, five pairs of return rollers 41 (41a, 41b, 41c, 41d, 41e) are arranged. The exit of the end return path 41e joins the conveyance path to the standby conveyance roller pair 34 corresponding to the sheet feeding cassette 29b below the sheet feeding section 5.
FIG. 1 is a circuit block diagram including a control device of the printer apparatus 1. As shown in the figure, the circuit block has a central processing unit (CPU) 50 as a center, and an interface controller (I / F_CONT) 51 and a printer controller (PR_CONT) 52 are connected to the CPU 50 via data buses. ing. A printer printing unit 53 is connected to the PR_CONT 52.

  Further, the CPU 50 includes a ROM (read only memory) 54, an EEPROM (electrically erasable programmable ROM) 55, an operation panel 56 of the main body operation unit, a sensor unit 57 to which an output from a sensor arranged in each unit is input, and a dot A counter 58 is connected.

  A system program is stored in the ROM 54, and the CPU 50 performs processing by controlling each unit in accordance with the system program.

  That is, in each unit, first, the I / F_CONT 51 converts print data supplied from a host device such as a personal computer into bitmap data and develops it in the frame memory 60. In the frame memory 60, a storage area is set for each of black (K), magenta (M), cyan (C), and yellow (Y), and data of each color is developed in a corresponding area.

  The data developed in the frame memory 60 is output to the PR_CONT 52, and is output from the PR_CONT 52 to the printer printing unit 53.

  The printer printing unit 53 is an engine unit, and under the control of PR_CONT 52, a rotation driving system (not shown) including the photosensitive drum 10, the primary transfer roller 20 and the like shown in FIG. And an unillustrated drive unit that drives the vertical movement of the transfer belt unit 3 and the rotation of the transfer belt 8.

  The black (K), magenta (M), cyan (C), and yellow (Y) color data output from the PR_CONT 52 are respectively sent from the printer printing unit 53 to the corresponding optical writing heads 13 shown in FIG. To be supplied.

  The dot counter 58 calculates the amount of toner used for printing based on the exposure area of the optical writing head 13 to the photosensitive drum 10 based on the data of each color supplied to the optical writing head 13.

  FIG. 3 is a diagram for explaining a circuit board configuration in which the above circuit is mounted in the printer apparatus 1 having the above configuration. The aforementioned I / F_CONT 51 is disposed on an interface control board (hereinafter referred to as an I / F control board) 65, and the PR_CONT 52 is disposed on a printer control main board 66 and a printer control sub board 67.

  Also, the K head shown in FIG. 3 is an optical writing head 13 that performs black (K) printing, the C head is an optical writing head 13 that performs cyan (C) printing, and the M head is magenta (M ), And the Y head is the optical writing head 13 that performs yellow (Y) printing. The K head, C head, M head, and Y head are arranged in the printer printing unit 53 described above.

  The I / F control board 65 includes circuits such as a CPU 65a, a ROM 65b, and a RAM 65c. The print data supplied from the host device is converted into video data as described above, and is constructed in the RAM 65c, for example. The frame memory 60 is expanded. The CPU 65a and the ROM 65b are included in the CPU 50 and the ROM 54 shown in FIG. An operation signal is input from the operation panel 56 to the I / F control board 65.

  The printer control main board 66 includes a CPU 66a, ROM 66b, RAM 66c, and EEPROM 66d, and the video data supplied from the frame memory 60 of the I / F_CONT 51 (I / F control board 65) is transferred to the K head, C head, and M head. , To Y head. The CPU 66a and the ROM 66b are included in the CPU 50 and the ROM 54 shown in FIG. Further, the EEPROM 66d is included in the EEPROM 55 shown in FIG.

  Each of the K head, C head, M head, and Y head incorporates an EEPROM, and stores information such as a serial number and light amount correction data in the EEPROM. For example, the K head EEPROM 70K stores the K head serial NO and the K head light quantity correction data. The C head EEPROM 70C stores the C head serial NO and the C head light quantity correction data. Similarly, the M head EEPROM 70M stores the M head serial NO and the M head light amount correction data, and the Y head EEPROM 70Y stores the Y head serial NO and the Y head light amount correction data. .

  The printer control sub-board 67 includes a CPU 67a, ROM (program) 67b, RAM 67c, and data flash 67d. The data flash 67d stores backup data of data stored in the EEPROM 66d of the printer control main board 66. The The CPU 67a and the ROM 67b are included in the CPU 50 and the ROM 54 shown in FIG.

In the above configuration, the processing operation of this example will be described below.
FIG. 4 is a flowchart for explaining the processing operation of this example, and explains the backup processing of the data stored in the aforementioned EEPROM 66d. The EEPROM 66d stores the serial number and light amount correction data of the optical writing head 13 (K head, C head, M head, and Y head) as described above, and is a consumable part of the printer 1 after shipment. In addition, periodic replacement parts and other parameters necessary for control are stored.

  First, it is determined whether there is a request for backup processing (step (hereinafter referred to as S) 1). Here, if there is a request for the backup process (S1 is YES), the process proceeds to the backup process. However, the backup process requires an implementation condition to be described later, and if this condition is not satisfied (S1 is NO), The execution condition of the backup process is determined (S2).

  Here, the implementation condition of the backup process is, for example, as follows. For example, there is a case where backup data valid in the past is not stored in the data flash 67 d of the printer control sub-board 67. This is a case where an initial rotation operation for pre-rotation processing or automatic adjustment processing (for example, print density adjustment processing) is performed. This is also the case where a change in the setting value stored in the EEPROM 66d, for example, a parameter necessary for the above-described control is performed. Further, this is a case where a certain amount of printing processing (for example, printing processing of 100 sheets) has been performed since the previous backup processing. Furthermore, this is a case where a certain degree of fixing rotation processing has been performed since the previous backup processing. Therefore, when the above implementation conditions are met (S2 is YES), a backup request is made (S3).

  Next, when there is a backup request (S1 is YES), it is first determined whether or not the motor is currently rotating (S4), and whether or not the connected device is being controlled (S5). If the motor is not rotating (S4 is NO) If the connected device is not under control (S5 is NO), backup processing is performed (S6). That is, when the motor is not performing the initial rotation operation, the automatic adjustment, the rotation operation for fixing warm-up, or the EEPROM writing operation, the backup process is performed (S6).

  This backup process is a process of storing (backing up) the data stored in the above-described EEPROM 66 d in the data flash 67 d of the printer control sub-board 67. Therefore, by this process, the serial number and light amount correction data of the optical writing head 13 (K head, C head, M head, and Y head) stored in the EEPROM 66d, the consumables of the printer apparatus 1 after shipment, Data such as replacement parts and other parameters necessary for control is also stored (backed up) in the data flash 67d.

  Next, the data stored in the data flash 67d by the above processing is restored when the printer control main board 66 is replaced. Therefore, it is necessary to determine that the printer control main board 66 has been replaced. The flowchart shown in FIG. 5 explains the processing operation for determining whether to replace the printer control main board 66.

  This process is executed in various initialization processes (step (hereinafter referred to as ST) 1). In this initialization process, for example, information check of the optical writing head 13 and EEPROM restoration confirmation are executed.

  First, a head abnormality such as non-connection is determined (ST2). For example, when the optical writing head 13 (K head, C head, M head, and Y head) is not connected to the apparatus main body, it is determined that the head is not connected and that the head is abnormal (YES in ST2). In this case, a head abnormality service call is generated (ST3) and notified to the operator.

  On the other hand, if the head is not abnormal (NO in ST2), data is read from the connected optical writing head 13 and it is determined whether or not the data matches the data stored in the ROM (flash memory) 66b (ST4). That is, the serial number data is read from the K head EEPROM 70K, the serial number data is read from the C head EEPROM 70C, the serial number data is read from the M head EEPROM 70M, and the serial number data is read from the Y head EEPROM 70Y. The data is read out, and the coincidence between each serial number data and the serial number data stored in the ROM (flash memory) 66b is determined.

  Here, if all the serial numbers of the K head, C head, M head, and Y head match (YES in ST4), any replacement of the printer control main board 66 and the optical writing head 13 is performed. Therefore, the normal operation flow is executed (ST5).

  On the other hand, if the serial numbers of all the heads do not match (NO in ST4), the printer control main board 66, the printer control sub board 67, or the optical writing head 13 (K head, C head, M head, And Y head) is determined to have been replaced, and the following processing is performed.

  First, any one of the serial number data of the four optical writing heads 13 (K head, C head, M head, and Y head) and the serial number data stored in the ROM (flash memory) 66b is selected. It is determined whether they match (ST6). Here, if any one of the serial number data matches (YES in ST6), it is determined that the individual head has been replaced. For example, it is determined that only the K head is replaced or the K head and the C head are replaced, and the printer control main board 66 is not replaced.

  Next, if none of the serial number data matches in the above determination (ST6 is NO), the serial number data stored in the ROM (flash memory) 66b and the serial number data stored in the EEPROM 66d are not matched. It is determined whether any of the data matches (ST7). Here, if any of the serial number data matches (YES in ST7), it is determined that only the data in the ROM (flash memory) 66b has changed, and the printer control main board 66 has not been replaced. Judge.

  On the other hand, in the above determination, if any serial number data does not match (NO in ST7), one of the serial number data stored in the data flash 67d of the printer control sub-board 67 is one. Judgment is made (ST8). Here, the data stored in the data flash 67d is the aforementioned backup data. Therefore, if any of the serial number data matches (YES in ST8), it can be determined that the data in the data flash 67d is regular data and the printer control main board 66 has been replaced.

  On the other hand, when the data of any serial number does not match in the above determination (ST8 is NO), the following cases can be considered. For example, all the optical writing heads 13 (K head, C head, M head, and Y head) are replaced at the same time. Further, when the printer control main board 66 and the printer control sub board 67 are replaced at the same time, or when the printer control main board 66 and all the optical writing heads 13 (K head, C head, M head, and Y head) are simultaneously changed. This is a case where the printer control sub-board 67 and all the optical writing heads 13 are replaced simultaneously. Furthermore, the printer control main board 66, the printer control sub board 67, and all the optical writing heads 13 are replaced.

  That is, in each of the above cases, it cannot be determined that only the printer control main board 66 has been replaced. Therefore, in this case, it cannot be determined that only the printer control main board 66 has been replaced, and the backup data stored in the data flash 67d is not restored.

  Accordingly, as described above, if any of the serial number data matches (YES in ST8), it is determined that the printer control main board 66 has been replaced, and the backup data stored in the data flash 67d. Is restored to the EEPROM 66d of the printer control main board 66 (ST9).

Thereafter, new head information is stored in a ROM (flash memory) 66b of the printer control main board 66 (ST10), an abnormality of the ROM (flash memory) 66b is determined (ST11), and the process is terminated. If it is determined that there is an abnormality in this determination, a memory abnormal service call is performed (YES in ST11, ST12).
As described above, according to the present embodiment, it is possible to easily determine in the initial process that is performed at regular intervals that only the printer control main board 66 has been replaced. Therefore, when the printer control main board 66 is replaced, the printer control main board 66 is replaced. It is possible to reliably restore the backup data to the EEPROM 66d of the substrate 66.

  In the description of the present embodiment, the light of the K head, C head, M head, and Y head corresponding to the video data of black (K), cyan (C), magenta (M), and yellow (Y). Although the writing head 13 has been described, the present invention is not limited to the above-described four-color optical writing head, and the present invention is also implemented in a printing apparatus using, for example, two-color or four-color or more optical writing heads. be able to. With this configuration, a more versatile printing apparatus can be realized.

  Although several embodiments of the present invention have been described, the present invention is included in the inventions described in the claims and their equivalents. Hereinafter, the invention described in the scope of claims at the beginning of the filing of the present patent application will be added.

Appendix 1
In a printing apparatus that outputs video data to a plurality of print heads and performs printing processing on a recording medium based on the control of the print control unit.
A first circuit board provided with first storage means for storing specific information of the plurality of print heads;
A second circuit board provided with second storage means for storing the same information as the information stored in the first storage means;
Specific information of the print head is further stored in third storage means disposed on the first circuit board, and the first information is stored on the first storage board based on the specific information of the print head stored in the third storage means. Determining means for determining that only the circuit board has been replaced;
A storage processing unit for storing the print head specific information stored in the second storage unit in the first storage unit based on a determination result of the determination unit;
A printing apparatus comprising:

Appendix 2
The determination unit first determines whether the print head identification information stored in the plurality of print heads matches the print head identification information stored in the third storage unit, and specifies at least one of the print heads. When the information does not match, the print head specific information stored in the first storage means is determined to match, and when the information does not match any print head specific information, the print data stored in the second storage means is further stored. The printing according to appendix 1, wherein it is determined whether or not the head specific information matches, and when any of the print head specific information matches, it is determined that only the first circuit board has been replaced. apparatus.

Appendix 3
In determining whether the print head specific information stored in the plurality of print heads matches the print head specific information stored in the third storage unit, the specific information of all the print heads does not match, and at least The printing apparatus according to claim 2, wherein when the specific information of the one print head matches, it is determined that any of the plurality of print heads has been replaced.

Appendix 4
The printing according to appendix 1, 2, or 3, wherein the plurality of print heads are optical writing heads that input the video data for each color and print a color corresponding to the recording medium. apparatus.

Appendix 5
In a control method of a printing apparatus that includes a first circuit board and a second circuit board, outputs video data to a plurality of print heads based on control of a print control unit, and performs print processing on a recording medium.
A process of storing specific information of the plurality of print heads in a first storage unit disposed on the first circuit board;
Storing the same information as the information stored in the first storage means in the second storage means disposed on the second circuit board;
Specific information of the print head is further stored in third storage means disposed on the first circuit board, and the first information is stored on the first storage board based on the specific information of the print head stored in the third storage means. A determination process for determining that only the circuit board of the circuit board has been replaced,
A storage process for storing, in the first storage means, print head specific information stored in the second storage means based on the determination result;
A control method for a printing apparatus.

Appendix 6
The determination process first determines whether the print head specific information stored in the plurality of print heads matches the print head specific information stored in the third storage means, and at least one of the print heads is determined. When the specific information does not match, the print head specific information stored in the first storage means is determined to match. When the specific information does not match any print head specific information, it is further stored in the second storage means. Additional information 5 is characterized in that it is determined whether or not the print head specific information matches, and when any print head specific information matches, it is determined that only the first circuit board has been replaced. Method for controlling the printing apparatus.

1 Full-color image forming device (printer)
DESCRIPTION OF SYMBOLS 2 Image formation part 3 Transfer belt unit 4 Toner supply part 5 Paper feed part 6 Belt type fixing unit 7 Conveyance unit for double-sided printing 8 Transfer belt 8a Lower running part surface 9 (9m, 9c, 9y, 9k) Developing device 10 Photoconductor Drum 11 Cleaner 12 Charging roller 13 Optical writing head 14 Developer 15 Developing roller 16 Housing 17 Bulkhead 15 Developing roller 18 First agitating and conveying screw 19 Second agitating and conveying screw 20 Primary transfer roller 21 Drive roller 22 Driven roller 23 Secondary transfer section 24 Belt cleaner 25 Waste toner collection container 26 (26m, 26c, 26y, 26k) Reserve tank 27 (27m, 27c, 27y, 27k) Toner cartridge 29 (29a, 29b) Paper feed cassette 30 Electrical section 31 Paper Take-out roller 32 Feed roller 33 捌Roller 34 Standby transport roller pair 35 Secondary transfer roller 36 Unloading roller pair 37 Paper discharge tray 38 Paper discharge roller pair 39 Return path 39a Start return path 39b Intermediate return path 39c End return path 41 (41a, 41b, 41c, 41d, 41e ) Return roller pair 50 CPU
51 Interface Controller (I / F_CONT)
52 Printer Controller (PR_CONT)
53 Printer Printing Unit 54 ROM
55 EEPROM
56 Operation Panel 57 Sensor Unit 58 Dot Counter 60 Frame Memory 65 I / F Control Board 65a CPU
65b ROM
65c RAM
66 Printer control main board 66a CPU
66b ROM
66c RAM
66d EEPROM
67 Printer control sub-board 67a CPU
67b ROM (program)
67c RAM
67d Data Flash 70K, 70M, 70C, 70Y EEPROM

Claims (6)

In a printing apparatus that outputs video data to a plurality of print heads and performs printing processing on a recording medium based on the control of the print control unit.
A first circuit board provided with first storage means for storing specific information of the plurality of print heads;
A second circuit board provided with second storage means for storing the same information as the information stored in the first storage means;
Specific information of the print head is further stored in third storage means disposed on the first circuit board, and the first information is stored on the first storage board based on the specific information of the print head stored in the third storage means. Determining means for determining that only the circuit board has been replaced;
A storage processing unit for storing the print head specific information stored in the second storage unit in the first storage unit based on a determination result of the determination unit;
A printing apparatus comprising:   The determination unit first determines whether the print head identification information stored in the plurality of print heads matches the print head identification information stored in the third storage unit, and specifies at least one of the print heads. When the information does not match, the print head specific information stored in the first storage means is determined to match, and when the information does not match any print head specific information, the print data stored in the second storage means is further stored. 2. The method according to claim 1, wherein a match with the specific information of the head is determined, and it is determined that only the first circuit board has been replaced when the specific information of any print head matches. Printing device.   In determining whether the print head specific information stored in the plurality of print heads matches the print head specific information stored in the third storage unit, the specific information of all the print heads does not match, and at least 3. The printing apparatus according to claim 2, wherein when the specific information of the one print head matches, it is determined that any of the plurality of print heads has been replaced.   4. The optical print head according to claim 1, wherein the plurality of print heads are optical write heads that input the video data for each color and print a color corresponding to the recording medium. Printing device. In a control method of a printing apparatus that includes a first circuit board and a second circuit board, outputs video data to a plurality of print heads based on control of a print control unit, and performs print processing on a recording medium.
A process of storing specific information of the plurality of print heads in a first storage unit disposed on the first circuit board;
Storing the same information as the information stored in the first storage means in the second storage means disposed on the second circuit board;
Specific information of the print head is further stored in third storage means disposed on the first circuit board, and the first information is stored on the first storage board based on the specific information of the print head stored in the third storage means. A determination process for determining that only the circuit board has been replaced,
A storage process for storing, in the first storage means, print head specific information stored in the second storage means based on the determination result;
A control method for a printing apparatus.   The determination process first determines whether the print head specific information stored in the plurality of print heads matches the print head specific information stored in the third storage means, and at least one of the print heads is determined. When the specific information does not match, the print head specific information stored in the first storage means is determined to match. When the specific information does not match any print head specific information, it is further stored in the second storage means. 6. The method according to claim 5, wherein a match with the print head specific information is determined, and when the print head specific information matches, it is determined that only the first circuit board has been replaced. The printing apparatus control method as described.

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