KR960006682B1 - Auto-checking method for disk player system - Google Patents

Abstract

a disk loading/unloading device(5) operated by the motion mode set by a function setting unit(2); a focusing control circuit(4) for the pick-up device as to a disk controlled by a spindle servo circuit(3); and a disk tilting device(7) as to bending of the disk. The method includes the step for checking the states of: spindle servo control and focusing control; disk loading/unloading; pick-up feeding; and disk tilting control.

Description

Self-diagnosis method of disc playback system

[Brief Description of Drawings]

1 is a block diagram of an apparatus for implementing a self-diagnosis method of a disc reproducing system according to the present invention.

FIG. 2A is a circuit configuration diagram for detecting a focusing error included in the focusing control circuit shown in FIG.

FIG. 2B is a diagram for explaining the configuration of the disk tilting apparatus shown in FIG.

3 is a flowchart for explaining the self-diagnosis method of the disc reproducing system according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Self diagnostic mode setting means 2: Function setting unit

3: spindle servo circuit 4: focusing control circuit

5: Disc loading / unloading device 6: Pickup transfer device

7: Disc tilt device 8: Microcomputer

9: monitor

Detailed description of the invention

The present invention relates to a self-diagnostic method of a disc reproducing system. More specifically, the spindle servo and focusability control related to disc reproducing by giving a micro-diagnostic function to a microcomputer as a control unit in charge of the overall control of the disc reproducing system. The present invention relates to a self-diagnosis method of a disc reproducing system that is visually displayed on a monitor when an abnormality occurs due to self-diagnosis of a state, a disc loading / unloading state, a pickup transfer control, and a disc tilting control.

In general, a laser disc reproducing system for reproducing a disc type information storage medium such as a laser disc in which audio and video signals are recorded or a compact disc providing high sound quality is provided with a tray capable of mounting a plurality of discs or a disc mounted in a toray. A disk loading / unloading device for loading / unloading a disk, a spindle motor for rotating the loaded disk at a constant speed, and a pick-up device for reading information from a disk rotating by the spindle motor. A focusing control circuit for controlling the focusing state on the information recording surface of the disk of the optical beam emitted from the pick-up apparatus, and a control means by a microcomputer for controlling the disc driving mechanism in accordance with the function set by the function setting means. Drive the disk normally, For reading out the information by irradiating and detecting the reflected light on that surface of the disc spindle motor is generally rotated state pickup appropriate level gwangbi in by the pick-up device is driven by a transfer device in which the 1800rpm are only made the reading of the information.

In addition, a disk tilting device including a tilting sensor constituted by a laser light source and a split light receiving element is also included on a disk tray or a base apparatus to which the disk tray is movably coupled. The disk tilting sensor includes a laser light source with respect to a disk surface. When the light beam emitted by the beam is emitted and the reflected light reflected from the disk surface is received by the two-split light receiving element, the disk tilting control for the deflection of the disk surface is performed based on the received amount of the received light beam.

In a disc reproducing system including a plurality of components or elements, if the operating conditions of any one component or element become poor, it is impossible to read the desired information from the disc or that completely different information may be read. many.

Accordingly, the present invention has been made in view of the above-described prior art, and the spindle servo control, focusing control, and disc related to the reproduction of the disc constituting the system by adding a self-diagnosis function to the microcomputer controlling the overall operation of the disc reproducing system. Self-diagnosis of disc reproducing system designed to display malfunction or inoperability on the monitor by self-diagnosing each component or element that is adapted to loading / unloading control, transfer control of pickup device, disc tilt control, etc. The purpose is to provide a method.

In order to achieve the above object, according to the present invention, a disk loading / unloading device for loading / unloading of a disk in accordance with an operation mode set by a function setting unit, and the disk being driven at constant speed under the control of a spindle servo circuit. A focusing control circuit for controlling the focusing of the optical beam of the pick-up device for reproducing, a pick-feeding device for position control of the pick-up device generating the optical beam, and a disc tilting device for tilting control of the bending state of the disk surface. A disc reproducing system, comprising: setting a self-diagnosis mode under the control of a microcomputer for controlling the operation of the entire disc reproducing system for reading out information recorded on the disc, and operating states for self-diagnosis performed under the control of the microcomputer; Detecting the normal operation by detecting the error, and when the normal operation is the result of the check of the normal operation While it is displaying the current operating mode of the monitor, if the normal operation condition is provided with a self-diagnosis method of the disc reproducing system of displaying the error code of the above places on the other monitor.

Preferably, the self-diagnostic mode is set by self-diagnostic mode setting means for instructing execution of the self-diagnostic program set in the micom by connecting to the microcomputer.

In the above self-diagnostic method of the disc reproducing system according to the present invention, the self-diagnostic program for the peripheral circuit and the device is set in advance in the microcomputer and the self-diagnostic mode setting means is provided in the microcomputer to set the micro-diagnostic mode when the self-diagnostic mode is set. By judging the input signals from the peripheral circuits and devices and displaying them on the monitor, it is possible to reliably recognize the abnormality of the disc playback system. Also, the peripheral circuits and devices operate normally when the self-diagnosis mode is set. In this case, the current operation status is displayed.

Next, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an apparatus for implementing a self-diagnostic method of a dry disk reproducing system according to the present invention. Reference numeral 1 denotes a self-diagnosis mode for instructing execution of a program relating to a self-diagnostic function employed in accordance with the present invention. As a means, for example, one mode setting key provided on the front panel of the disc playback system is employed.

2 shows a function setting section including, for example, an FL (fluorescent display tube) device which is displayed on the front panel or employs a remote control to display a plurality of keys and an operation mode for setting a function of a disc playback system.

3 is a spindle servo circuit for maintaining a constant speed of a spindle motor (not shown) for rotating a disk, and the spindle servo circuit 3 typically has a hall sensor type F / G (Frequency).

A generator is provided to detect whether the rotation of the spindle motor is maintained at a constant speed and to perform control for maintaining the constant speed of the spindle motor based on the detected rotation speed.

4 shows a focusing control circuit for controlling the focusing state of the disc by the pick-up apparatus when the disc is accessed by the pick-up apparatus (not shown), and the focusing control circuit 4 is typically shown in FIG. As shown in the following, the received signal obtained in the E / F region of the light receiving element of the pickup device is compared by the differential amplifier 4a, and the comparison result is detected by the focusing error FE to perform the focusing control.

5 is a disk loading / unloading device which carries out loading / unloading of a disk including a tray on which a plurality of disks are mounted, 6 is a pickup transporting device which carries a pickup device for accessing a disk, and 7 is a disk. A disc tilting device for performing a tilting action of a disc for compensation of light beams to warping or bending of a surface, and typically the disc tilting device 7 is shown in FIG. When the tilting sensor including the laser light source 7a and the two-split light receiving element 7b shown in Fig. 1 is employed and the light beam emitted from the laser light source 7a is reflected from the surface of the disk and is incident on the light receiving element 7b. The reflected light detects the tilting error signal TE of the disk surface based on the difference in the amount of light incident on the light receiving element 7b to control the disk surface of the light beam.

8 is a microcomputer programmed with a self-diagnostic function according to the present invention while controlling the overall operation of each of the above-described peripheral circuits and peripheral devices, wherein the peripheral circuits 2, 3, 4 and peripheral devices 5 when the self-diagnostic mode is set. (6) and (7) receive input information or operation information, and if an abnormal state is detected, an error code is displayed. In the normal operation state, a control is displayed to display the operation state currently performed by the microcomputer (8). Will be performed.

9 indicates an error code under the control of the microcomputer 8 when an abnormality occurs in at least one component of the peripheral circuit and / or the peripheral device, or is executed by the microcomputer 8 when normal operation is performed. This monitor displays the operation mode.

Next, a self-diagnosis method of the disc reproducing system according to the present invention will be described with reference to the flowchart shown in FIG.

First, the microcomputer 8 has a function of determining the error of the input state during the normal operation of the function setting unit 2 and the disk sticking device 7 of the disc reproducing system shown as the peripheral circuit in FIG. Control program data is provided.

With respect to such program data, it is determined in step S20 whether the self-diagnosis mode is set by the self-diagnosis mode setting means 1 of FIG. 1, and if the self-diagnosis mode is not set, through the function setting unit 2 in step S22. If the self-diagnosis mode is set, the function setting unit 2 and the spindle shown as peripheral circuits and peripheral devices in FIG. 1 in step S24 are performed. The operation state of the servo circuit 3, the focusing control circuit 4, the disk loading / unloading device 5, the pickup transfer device 6 and the disk tilting device 7 is checked.

For example, the microcomputer 8 determines whether the input of the function setting unit 2 is provided at a normal level according to the program, whether the drive state of the spindle motor is normally operated, and whether the amount of focusing error exceeds the tolerance. Checking the input and control status of the peripheral circuit regarding whether or not, etc., while the disk loading or unloading operation by the disk loading / unloading device 5 operating in relation to such peripheral circuit occurs or the disk tray It is checked whether the seat is seated in the correct position, whether the mechanism for transporting the pick-up device is working properly, and whether the tilting device for the disk surface performs the given function normally.

As a result of the above check, if an abnormality has occurred in at least one component of the peripheral circuit and the peripheral device in step S26, the error code for the component in the abnormal state is displayed on the monitor 9 in step S28. If the abnormal state does not occur, the microcomputer 8 displays on the monitor 8 an operation mode performed under the control of the microcomputer 8 in step S30.

On the other hand, according to the present invention, although only the representative components as the peripheral circuit and peripheral device of the disc reproducing system have been described as an example, the mechanism for performing disc chucking operation or whether the output level of the pick-up device is required to be checked, for example, Self-diagnosis can also be performed.

As described above, according to the self-diagnostic method of the disc playback system according to the present invention, the disc playback is performed by checking and displaying the function or operation state of the peripheral circuit and peripheral devices related to the drive and access of the disc under the control of the microcomputer. The maintenance of the system becomes easier.

Claims (2)

The disk loading / unloading device 5 for loading / unloading a disk according to the operation mode set by the function setting section 2, and the pickup device for the disk controlled by the spindle servo circuit 3 at constant speed. A focusing control circuit 4 for focusing the optical beam, a pickup transport apparatus 6 for position control of the pick-up apparatus generating the optical beam, and a disk tilting apparatus 7 for tilting control of the bending state of the disk surface In the disc reproducing system provided with the same, setting the self-diagnosis mode under the control of the microcomputer 8 that controls the operation of the entire disc reproducing system that reads the information recorded on the disc. The self-diagnosis executed under the control detects the operation status of the spindle servo control and focusing control state, the disc loading / unloading control state, the pickup transfer state and the disc tilting control state to determine normal operation. In the checking step, if the normal operation is a result of the check of the normal operation, the current operation mode is displayed on the monitor 9, while in the abnormal operation, an error code of an abnormal point is displayed on the monitor 9; Self-diagnosis method of disc playback system, characterized in that consisting of 2. The self-diagnostic mode according to claim 1, characterized in that the self-diagnostic mode is set by the self-diagnostic mode setting means (1) which is connected to the microcomputer (8) and instructs execution of the self-diagnostic program set in the microcomputer (8). Self-diagnosis method of disc playback system.