JP2008028581A - Receiver and error information recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a receiver mounted with a digital tuner that records date and time information when the date and time information by the digital tuner can be acquired or records an accumulated operating time inside the receiver when the date and time information cannot be acquired on the occurrence of an error. <P>SOLUTION: The television broadcast receiver (receiver) 10 is provided with: the digital tuner 11 for receiving a digital broadcast signal; a date and time information acquisition section 20a for acquiring date and time information from the received digital broadcast signal; a counter 20c for counting the accumulated operating time; and a nonvolatile memory 22 for storing the date and time information or the accumulated operating time. The television broadcast receiver 10 is provided with a discrimination section 20b for discriminating whether or not the date and time information based on the digital broadcast signal can be acquired when detecting occurrence of an error, and stores the date and time information on the occurrence of the error to the nonvolatile memory 22 when the date and time information can be acquired or stores the accumulated operating time on the occurrence of the error when the date and time information cannot be acquired. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a receiving apparatus and an error information recording method, and more specifically, a receiving apparatus equipped with a digital tuner and capable of acquiring an error occurrence date and time from the digital tuner when an error occurs, and an error information recording method by the receiving apparatus About.

  In a receiving apparatus such as a television broadcast receiver equipped with a digital tuner, an error occurrence time is recorded when an error (failure) occurs in a television system or hardware. . For example, some televisions have a counter function that counts the accumulated operation time after the device is operated. This counter function can be used to identify the accumulated operation time when an error occurs. it can.

  However, this cumulative operating time is information indicating how many hours have elapsed since the operation (reset) at the time when the error occurred, and indicates date and time information indicating what hour and what time the error occurred. is not. Therefore, in order to specify the time when the error occurred, it is necessary to perform a reverse calculation from the accumulated operation time, which is troublesome.

  On the other hand, Patent Document 1 proposes a method of acquiring date and time information at the time of error occurrence from a digital broadcast signal or a calendar circuit. According to this, the digital tuner basic circuit transmits an NTSC composite signal obtained by demodulating the received signal to the monitor device. Reception / demodulation processed by an individual circuit (latch circuit, three edge detection circuits, 4-input OR gate, counter, R / W / address generation unit), separation / extraction of control signals, Error status data during an error operation in MPEG decoding is output, and date / time information is generated every time error status data occurs. The error status data and the error history data of date / time information are stored in the nonvolatile memory. As a result, error history data can be recorded while reducing the processing load on the built-in CPU.

  FIG. 7 is a block diagram showing a configuration of a conventional digital tuner described in Patent Document 1. In FIG. The digital tuner includes a reception demodulation unit 101 that performs channel selection and demodulation processing on a reception signal Si received by a parabolic antenna / converter from an MPEG compression digital broadcast from a digital broadcast satellite, and a demodulation output from the reception demodulation unit 101. A separation / extraction unit 102 for separating (extracting) various control information from data, an MPEG decoding unit 103 for decompressing demodulated MPEG compressed data, and an NTSC composite signal So obtained by encoding MPEG decompressed data based on the NTSC system are not shown. And an NTSC encoding unit 104 for outputting to a monitor.

  Further, the digital tuner controls each part, and in particular, executes a control for sequentially fetching error status data S1, S2, S3, and S4 at the time of an error operation in data processing by polling control, and an error status captured by the CPU 105 A non-volatile memory 106 such as a flash memory for storing data S1 to S4, a bus line 107 for exchanging data and control data between each unit and the CPU 105, and an external device such as a general-purpose computer And an interface (I / F) unit 108.

  The digital tuner includes a timer (not shown) for counting up the date and time based on the date and time information from the separation and extraction unit 102 and storing it in the nonvolatile memory 106 together with the error status data S1 to S4. .

  The reception demodulation unit 101, the separation extraction unit 102, the MPEG decoding unit 103, and the NTSC encoding unit 104 are each provided with an error output terminal that outputs error state data S1 to S4 at the time of an error operation in data processing. The error state data S <b> 1 to S <b> 4 from the error output terminal is captured by the CPU 105 via the bus line 107 and stored in the nonvolatile memory 106.

In this way, when an error occurs in a television broadcast receiver equipped with a digital tuner, time information is acquired from the digital tuner, and this time information is stored together with error state data, thereby identifying the cause of the error, etc. It was used for.
JP 2000-228780 A

  However, according to the invention described in Patent Document 1, since time information of the digital tuner is used, accurate time information cannot be acquired when the time information cannot be acquired due to antenna disconnection or the like. . Even when the time information is acquired by incorporating a calendar circuit instead of the digital tuner, it is still impossible to acquire the accurate time information unless the correct date and time are set.

The present invention has been made in view of the above circumstances, and in a receiving apparatus equipped with a digital tuner, when date and time information based on the digital tuner can be acquired when an error occurs, the date and time information is obtained. If the date and time information based on the digital tuner is not recorded, the purpose is to record the accumulated operating time inside the apparatus.
Another object of the present invention is to make it possible to display error information including date and time information in a service mode for service personnel or a user mode for users, thereby facilitating analysis of error contents.

  In order to solve the above problems, a first technical means of the present invention includes a digital tuner that receives a digital broadcast signal, date and time information acquisition means that acquires date and time information from the received digital broadcast signal, and cumulative operating time. In a receiving device having a counting means for counting and a storage means for storing date / time information or accumulated operating time, a judging means for judging whether date / time information based on a digital broadcast signal has been acquired when an error occurrence is detected. Provided, when it is determined that the date and time information can be acquired by the determining means, the date and time information at the time of error occurrence is stored in the storage means, and when the date and time information is determined not to be acquired by the determining means, The accumulated operation time when an error occurs is stored in the storage means.

  The second technical means is characterized in that, in the first technical means, information relating to the error content is stored in the storage means in association with the date / time information or the accumulated operation time at the time of occurrence of the error.

  The third technical means includes display means for displaying error information stored in the storage means in the first or second technical means, and the display means uses the date and time when an error occurs as the error information. It is characterized by displaying information or accumulated operation time and information on error contents.

  According to a fourth technical means, in the third technical means, the display means displays a service mode for displaying error information for a service person and a user mode for displaying error information for a user in different display forms. It is characterized by doing.

  According to a fifth technical means, in the third technical means, when the date and time information is acquired from the digital broadcast signal when an error occurs and the same error occurs continuously for a predetermined number of times, the display means describes the content of the error. A warning message is displayed in response.

  A sixth technical means is the third technical means, wherein when the error occurs, the display means acquires date / time information from the digital broadcast signal, and when the same error occurs continuously a predetermined number of times, error information of the error is obtained. Is explicitly displayed.

  The seventh technical means includes a digital tuner that receives a digital broadcast signal, a date and time information acquisition means that acquires date and time information from the received digital broadcast signal, a count means that counts cumulative operation time, and date and time information or cumulative operation. In the error information recording method by the receiving device having the storage means for storing the time, it is determined whether date / time information based on the digital broadcast signal has been acquired when the occurrence of the error is detected. If it is determined that the date / time information has been acquired, the date and time information at the time of error occurrence is stored in the storage means. If it is determined that the date / time information has not been acquired, the accumulated operating time at the time of error occurrence is stored in the storage means. It is characterized by doing.

  The eighth technical means is characterized in that, in the seventh technical means, information relating to the error content is stored in the storage means in association with the date / time information or the accumulated operation time at the time of occurrence of the error.

  When the ninth technical means displays the error information stored in the storage means in the seventh or eighth technical means, as the error information, the date and time information at the time of occurrence of the error or the accumulated operation time, It is characterized by displaying information on error contents.

  A tenth technical means is characterized in that, in the ninth technical means, a service mode for displaying error information for service personnel and a user mode for displaying error information for users are displayed in different display forms. It is a thing.

  The eleventh technical means, in the ninth technical means, when date and time information is acquired from a digital broadcast signal when an error occurs and the same error occurs continuously a predetermined number of times, a warning message corresponding to the content of the error is displayed. It is characterized by displaying.

  According to a twelfth technical means, in the ninth technical means, when the date and time information based on the digital broadcast signal is acquired when an error occurs and the same error occurs continuously a predetermined number of times, the error information of the error is explicitly indicated. It is characterized by displaying.

  According to the present invention, when date and time information based on digital broadcasting can be acquired, the date and time of error occurrence can be accurately grasped by recording the date and time information when an error occurs. On the other hand, since there is a usage environment (for example, cable TV etc.) in which an antenna is not connected in the case of a television, the error occurrence time can be specified by recording the internal accumulated operation time at this time. If the date and time information can be acquired accurately in this way, it is easy to identify the cause in the case of an error that has a problem on the broadcast wave side, for example.

  In addition, when displaying error information in the normal user mode, when the user calls the service center, the user himself / herself sees the error information and informs the contents so that the service center can know the error state. A use scene is considered. At this time, date and time information is acquired, and if there is an error that occurred continuously at the same time or near time, it is possible to acquire effective information from the user efficiently by explicitly displaying it. it can.

  Hereinafter, preferred embodiments of a receiving device and an error information recording method by the receiving device according to the present invention will be described with reference to the accompanying drawings. Note that the present invention is intended for all receiving apparatuses including a digital tuner, but a case where the receiving apparatus of the present invention is applied to a television broadcast receiver will be described as a representative example.

  FIG. 1 is a block diagram showing a configuration example of a television broadcast receiver according to an embodiment of the present invention. In the figure, reference numeral 10 denotes a television broadcast receiver. The television broadcast receiver 10 includes a digital tuner 11, a demodulation circuit 12, an external input I / F 13, a video switch 14, an audio switch 15, a video processing circuit 16, a display 17, an audio processing circuit 18, a speaker 19, a system microcomputer 20, A B-CAS reader / writer 21, a nonvolatile memory 22, and a RAM 23 are provided.

  The digital tuner 11 receives an MPEG compressed digital broadcast signal from a satellite (BS / CS) or a ground station via an antenna (not shown). The digital broadcast signal is modulated by a modulation method such as a QAM (Quadrature Amplitude Modulation) method, a 64 QPSK (Quadrature Phase Shift Keying) method, a 256 QPSK method, or an OFDM (Orthogonal Frequency Division Multiple) method.

  The demodulation circuit 12 demodulates the digital broadcast signal received by the digital tuner 11 and separates the demodulated digital broadcast signal into a video signal and an audio signal. The video signal is sent to the video switch 14 and the audio signal is sent to the audio switch 15.

  The external input I / F 13 is connected to an external device such as a DVD recorder or an HDD recorder, and inputs video signals and audio signals from an external recording medium such as a DVD or HDD. The external input I / F 13 sends a video signal to the video switch 14 and sends an audio signal to the audio switch 15.

  The video switch 14 switches to either the video signal from the demodulation circuit 12 or the video signal from the external input I / F 13 based on the switching signal from the system microcomputer 20 and outputs the switched video signal to the video processing circuit 16. To do. Similarly, the audio switch 15 switches to either an audio signal from the demodulation circuit 12 or an audio signal from the external input I / F 13 based on a switching signal from the system microcomputer 20, and the switched audio signal is converted into an audio processing circuit. 18 is output. The television broadcast receiver 10 includes a decoder that decodes (decompresses) the MPEG compressed data demodulated by the demodulating circuit 12 in the preceding stage of the video processing circuit 16, but the description thereof is omitted here. .

  The video processing circuit 16 generates an NTSC composite signal obtained by encoding the MPEG decompressed data based on a display format such as the NTSC system, and outputs the NTSC composite signal to a display 17 such as an LCD (Liquid Crystal Display). The video processing circuit 16 includes an OSD unit 16a that generates various on-screen signals to be superimposed on the video signal. The OSD unit 16a generates error information shown in FIGS. The audio processing circuit 18 performs predetermined processing on the audio signal from the audio switch 15 and outputs the processed signal to the speaker 19.

  The B-CAS reader / writer 21 is connected to the system microcomputer 20 and reads the B-CAS card and writes to the B-CAS card. The B-CAS reader / writer 21 includes a mechanism for detachably mounting a B-CAS card.

  The nonvolatile memory 22 corresponds to the storage means of the present invention, and stores error information including date and time information based on the digital tuner 11 or accumulated operation time counted by the counter 20c. For example, a flash memory or the like is used as the nonvolatile memory 22. The storage means of the present invention is not limited to a built-in memory, and an external recording medium such as a PC card or a memory card may be used.

  The system microcomputer 20 determines the date / time information acquisition unit 20a that acquires date / time information from the digital broadcast signal received by the digital tuner 11 and whether date / time information based on the digital broadcast signal has been acquired when an error occurrence is detected. Unit 20b and a counter 20c that counts the cumulative operating time inside the apparatus. When the determination unit 20b determines that the date / time information can be acquired, the system microcomputer 20 stores the date / time information at the time of occurrence of the error in the nonvolatile memory 22, and the determination unit 20b cannot acquire the date / time information. If determined, the accumulated operation time at the time of occurrence of the error is stored in the nonvolatile memory 22.

  The date / time information acquired by the date / time information acquisition unit 20a includes the current date and time, and can be acquired from, for example, a TOT (Time Offset Table) included in the stream of the digital broadcast signal. According to the regulations of ARIB (Association of Radio Industries and Businesses), this TOT is superimposed on the stream at a period of 5 s. When the digital broadcast signal can be received, the date / time information acquisition unit 20a always monitors whether or not the TOT is included in the stream, and if it is included, the date / time information acquisition unit 20a uses the JST (Japan Standard Time) in the TOT. Update information. Until the next date and time information can be acquired, the time is advanced by a predetermined time (1 ms) using the system time of the OS (Operating System). This date / time information is stored in the RAM 23.

  Similarly, the system time of the OS is used for the cumulative operation time. Since this accumulated operation time is stored in the nonvolatile memory 22, it is configured to be written every predetermined time (for example, 30 minutes) in consideration of the life of the nonvolatile memory 22 and the like. The system time of the OS of this system microcomputer 20 is counted 1 ms at a time from the rise of the main microcomputer.

  As described above, when the TOT can be acquired periodically or at an arbitrary timing, the date information and error information by the TOT, or the date information and error information by the counter values stored in the TOT and the RAM 23 are written in the nonvolatile memory 22. On the other hand, when the TOT cannot be obtained at all, the accumulated operation time and error information are written in the nonvolatile memory 22.

  Here, the error detection method can be realized by a method similar to the conventional method. For example, each part constituting the television broadcast receiver 10 is provided with an error output terminal (not shown) for outputting error information during an error operation in data processing. The system microcomputer 20 performs polling control on each error output terminal, sequentially fetches error information, and stores it in the nonvolatile memory 22. At this time, a code may be assigned to the error content and stored.

  As another method of error detection, error information may be output from the error output terminal to the system microcomputer 20 when an error occurrence is detected in each part of the television broadcast receiver 10. Then, the system microcomputer 20 stores error information from the error output terminal in the nonvolatile memory 22.

  The error information acquired in this way is associated with date / time information or accumulated operation time at the time of error occurrence, and the service person or user can accurately grasp the time at the time of error occurrence.

  FIG. 2 is a flowchart for explaining an example of the error information recording method by the television broadcast receiver 10 of the present invention. First, when the occurrence of an error is detected (step S1), the television broadcast receiver 10 determines whether date / time information based on the digital broadcast received by the digital tuner 11 has been acquired (step S2).

  The television broadcast receiver 10 records the date / time information in the nonvolatile memory 22 (step S3) when the date / time information can be acquired in step S2 (in the case of YES). On the other hand, when the date / time information cannot be acquired (in the case of NO), the cumulative operation time counted by the counter 20c is recorded in the nonvolatile memory 22 (step S4).

  FIG. 3 is a diagram illustrating a display example when error information is displayed in the service mode. The error information in the service mode is displayed on the display 17 so that the service person can check the error contents when an error occurs, and is displayed by the number of errors that have occurred. In this example, a total of five errors have occurred, and three of the same errors (16 SYSTEM_ERR) have occurred at the same time (2006/06/10 10:44). The date / time information at this time is acquired based on the TOT information of the digital tuner 11, but when the date / time information cannot be acquired from the digital tuner 11, the accumulated operation time may be displayed.

  FIG. 4 is a diagram illustrating a display example when error information is displayed in the user mode. When displaying error information in the normal user mode, there may be a usage scene where the user himself / herself sees the error information and informs the contents so that the service center can know the error status when the user calls the service center. It is done. At this time, date and time information has been acquired, and if there is an error that occurred continuously at the same time or near time, the service center side can display effective information from the user by explicitly displaying it. Can be acquired.

  The error information in the user mode is displayed on the display 17 so that the user can read the error content when an error occurs. In the user mode, a code indicating a system state (corresponding to error information) and an identification number of the B-CAS card are displayed. The error status and date / time information can be understood from the code indicating the system status. The user mode screen is displayed when a “user mode” in the menu is selected and specified from a remote controller (not shown) or the like.

  The content of the error here cannot be repaired by the user, so it is not necessary to actively inform the user of the content. Therefore, the system status at the time of error occurrence is coded to make it easy for the user to see and to convey it to the service staff by telephone or the like. Service personnel can accurately identify what kind of error has occurred and when, based on the system status code transmitted from the user, so that the cause of the error can be identified and repaired quickly. .

  In each mode shown in FIG. 3 and FIG. 4, when date and time information is acquired from a digital broadcast signal when an error occurs and the same error occurs consecutively for a predetermined number of times (for example, three times or more), the error is explicitly indicated. You may make it display. For example, various display forms such as displaying only the information of the relevant error, changing the display order to the top, changing the character color, underlining, making the text italic, bolding, changing the font, etc. However, it is only necessary to distinguish from other error information. The processing in such a display form is executed by the OSD unit 16a and displayed on the display 17.

  In addition, when the date and time information based on the digital broadcast signal is acquired when an error occurs and the same error occurs continuously for a predetermined number of times (for example, three times or more), a warning message corresponding to the content of the error is displayed. Also good. For example, a warning message such as “Fatal system error. It is dangerous to use any more, so please contact the service center immediately.” Is displayed. Such a warning message is created in accordance with the error content by the OSD unit 16 a and displayed on the display 17. Alternatively, a warning message for each error content may be stored in the nonvolatile memory 22, and the system microcomputer 20 may read and display a warning message corresponding to the error content.

  In the above, the system microcomputer 20 is configured to count the number of occurrences of errors for each error content, and to determine whether or not the same error has occurred continuously a predetermined number of times.

  FIG. 5 is a diagram for explaining the error content corresponding to the error display. In this example, six error display examples in the service mode are shown. “OUT_OF_R” indicates an error display when a non-corresponding signal is input for 8 minutes or more during DVI (Digital Visual Interface) viewing. “E_PICIC” indicates an error display when the video processing IC is reset. Examples of the occurrence of reset in the video processing IC include a DDR (Double Data Rate) memory error and a communication error with the main system microcomputer.

  “E_MONITR” indicates an error display when a monitor abnormality is detected. Monitor abnormalities include, for example, FAN stop and temperature abnormality detection. “E_PICICBT” indicates an error display when a reset occurs in the video processing IC at the time of activation. “E_SHORTV” indicates an error display when the 1.8V line voltage is short-circuited. “E_DSDEV” indicates an error display when the digital standby fails. As an example of this error, for example, the device is initialized when returning from the low power consumption mode at the end, but the initialization of the device fails. Thus, the errors targeted in the present invention are mainly system errors and hardware errors.

  FIG. 6 is a flowchart for explaining another example of the error information recording method by the television broadcast receiver 10 of the present invention. First, when the occurrence of an error is detected (step S11), the television broadcast receiver 10 determines whether date / time information based on the digital broadcast received by the digital tuner 11 has been acquired (step S12).

  If the date / time information has been acquired in step S12 (YES), the television broadcast receiver 10 records the date / time information in the nonvolatile memory 22 (step S13). On the other hand, when the date / time information cannot be acquired (in the case of NO), the cumulative operation time counted by the counter 20c is recorded in the nonvolatile memory 22 (step S14).

  Next, the television broadcast receiver 10 determines whether or not the same error has occurred continuously a predetermined number of times at the same time or near time (step S15), and if the same error has occurred a predetermined number of times (YES) ), A warning message corresponding to the error content is displayed on the display 17 (step S16). In step S15, if the same error has not occurred a predetermined number of times (in the case of NO), the process returns to step S11 and the process is repeated.

  As described above, according to the present invention, when date and time information based on digital broadcasting can be acquired, the date and time of error occurrence can be accurately grasped by recording date and time information when an error occurs. On the other hand, since there is a usage environment (for example, cable TV etc.) in which an antenna is not connected in the case of a television, the error occurrence time can be specified by recording the internal accumulated operation time at this time. If the date and time information can be acquired accurately in this way, it is easy to identify the cause in the case of an error that has a problem on the broadcast wave side, for example.

  In addition, when displaying error information in the normal user mode, when the user calls the service center, the user himself / herself sees the error information and informs the contents so that the service center can know the error state. A use scene is considered. At this time, date and time information is acquired, and if there is an error that occurred continuously at the same time or near time, it is possible to acquire effective information from the user efficiently by explicitly displaying it. it can.

It is a block diagram which shows the structural example of the television broadcast receiver which concerns on one Embodiment of this invention. It is a flowchart for demonstrating an example of the error information recording method by the television broadcast receiver of this invention. It is a figure which shows the example of a display at the time of displaying error information in service mode. It is a figure which shows the example of a display at the time of displaying error information in user mode. It is a figure for demonstrating the error content corresponding to an error display. It is a flowchart for demonstrating the other example of the error information recording method by the television broadcast receiver of this invention. 10 is a block diagram illustrating a configuration of a conventional digital tuner described in Patent Document 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Television broadcast receiver, 11 ... Digital tuner, 12 ... Demodulation circuit, 13 ... External input I / F, 14 ... Video switch, 15 ... Audio switch, 16 ... Video processing circuit, 16a ... OSD part, 17 ... Display , 18 ... audio processing circuit, 19 ... speaker, 20 ... system microcomputer, 20a ... date and time information acquisition unit, 20b ... determination unit, 20c ... counter, 21 ... B-CAS reader / writer, 22 ... non-volatile memory, 23 ... RAM, DESCRIPTION OF SYMBOLS 101 ... Reception demodulation part, 102 ... Separation extraction part, 103 ... MPEG decoding part, 104 ... NTSC encoding part, 105 ... CPU, 106 ... Non-volatile memory, 107 ... Bus line, 108 ... I / F part.

Claims (12)

A digital tuner for receiving a digital broadcast signal; date and time information acquisition means for acquiring date and time information from the received digital broadcast signal; a count means for counting cumulative operation time; and storage means for storing date and time information or cumulative operation time In a receiving device comprising:
A determination means for determining whether date / time information based on a digital broadcast signal has been acquired when an error occurrence is detected;
If it is determined that the date and time information has been acquired by the determination means, the date and time information at the time of error occurrence is stored in the storage means,
The receiving apparatus, wherein when the date and time information is determined not to be acquired by the determining means, the accumulated operating time when an error occurs is stored in the storage means.   The receiving apparatus according to claim 1, wherein information related to error contents is stored in the storage unit in association with date / time information or accumulated operating time at the time of occurrence of an error. The receiving apparatus according to claim 1 or 2, further comprising display means for displaying error information stored in the storage means.
The display means displays date / time information or accumulated operating time at the time of an error and information on error contents as the error information.   4. The receiving apparatus according to claim 3, wherein the display unit displays a service mode for displaying error information for a service person and a user mode for displaying error information for a user in different display forms. A receiving device.   4. The receiving device according to claim 3, wherein when the error occurs, the display means acquires date and time information based on the digital broadcast signal, and when the same error occurs continuously a predetermined number of times, the display unit responds to the content of the error. A receiving apparatus that displays a warning message.   4. The receiving device according to claim 3, wherein when the error occurs, date and time information based on the digital broadcast signal is acquired, and when the same error occurs continuously a predetermined number of times, the display means clearly indicates error information of the error. Receiving apparatus characterized by display. A digital tuner for receiving a digital broadcast signal; date and time information acquisition means for acquiring date and time information from the received digital broadcast signal; a count means for counting cumulative operation time; and storage means for storing date and time information or cumulative operation time In the error information recording method by the receiving device comprising:
Determine whether date / time information based on the digital broadcast signal was obtained when an error occurred,
As a result of the determination, if it is determined that the date / time information has been acquired, the date / time information at the time of error occurrence is stored in the storage means,
An error information recording method characterized in that, when it is determined that date and time information cannot be acquired, an accumulated operation time at the time of error occurrence is stored in the storage means.   8. The error information recording method according to claim 7, wherein information relating to error contents is stored in the storage means in association with date / time information or accumulated operation time at the time of occurrence of an error.   9. The error information recording method according to claim 7 or 8, wherein when the error information stored in the storage means is displayed, the error information is related to date and time information or accumulated operating time at the time of error occurrence and error contents. An error information recording method characterized by displaying information.   10. The error information recording method according to claim 9, wherein a service mode for displaying error information for a service person and a user mode for displaying error information for a user are displayed in different display forms. Information recording method.   10. The error information recording method according to claim 9, wherein when date and time information based on a digital broadcast signal is acquired when an error occurs and the same error occurs continuously a predetermined number of times, a warning message corresponding to the content of the error is displayed. An error information recording method characterized by displaying.   10. The error information recording method according to claim 9, wherein when the error occurs, date / time information based on the digital broadcast signal is acquired, and when the same error occurs continuously a predetermined number of times, the error information of the error is explicitly displayed. An error information recording method comprising:

Images