Abstract: A disc player 10 is equipped with a positioning unit 14 that has step plate 54 and positions a disc 1, a clamper unit 15 that has a clamp plate 66 and carries out a clamp operation on the disc positioned by the positioning unit, a drive unit 16 that has a pickup and a turntable 19 on a drive plate 18, and rotates the disc clamped on the turntable by the clamper unit to take information from the disc by the pickup, wherein the positioning unit and the clamper unit are provided separately from each other, and movable vertically to the drive unit.

Abstract: A disc player 10 which moves a disc stopper 55 controlling the movement of a drawn disc 1 and clamps and chucks the disc on a turntable, wherein the disc stopper is designed so that is it positioned in a positioning position where the disc and the turntable are positioned concentric with each other and in a retracted position where the disc stopper is spaced from the disc clamped and chucked to a turntable.

Abstract: A disc player 10 which moves a disc stopper 55 controlling the movement of a drawn disc 1 and clamps and chucks the disc on a turntable, wherein the disc stopper is designed so that is it positioned in a positioning position where the disc and the turntable are positioned concentric with each other and in a retracted position where the disc stopper is spaced from the disc clamped and chucked to a turntable.

Abstract: A disc player 10 is equipped with a positioning unit 14 that has step plate 54 and positions a disc 1, a clamper unit 15 that has a clamp plate 66 and carries out a clamp operation on the disc positioned by the positioning unit, a drive unit 16 that has a pickup and a turntable 19 on a drive plate 18, and rotates the disc clamped on the turntable by the clamper unit to take information from the disc by the pickup, wherein the positioning unit and the clamper unit are provided separately from each other, and movable vertically to the drive unit.

Abstract: A disc player 10 is equipped with a positioning unit 14 that has step plate 54 and positions a disc 1, a clamper unit 15 that has a clamp plate 66 and carries out a clamp operation on the disc positioned by the positioning unit, a drive unit 16 that has a pickup and a turntable 19 on a drive plate 18, and rotates the disc clamped on the turntable by the clamper unit to take information from the disc by the pickup, wherein the positioning unit and the clamper unit are provided separately from each other, and movable vertically to the drive unit.

Abstract: A disc player 10 which moves a disc stopper 55 controlling the movement of a drawn disc 1 and clamps and chucks the disc on a turntable, wherein the disc stopper is designed so that is it positioned in a positioning position where the disc and the turntable are positioned concentric with each other and in a retracted position where the disc stopper is spaced from the disc clamped and chucked to a turntable.

Abstract: A disc player 10 which moves a disc stopper 55 controlling the movement of a drawn disc 1 and clamps and chucks the disc on a turntable, wherein the disc stopper is designed so that is it positioned in a positioning position where the disc and the turntable are positioned concentric with each other and in a retracted position where the disc stopper is spaced from the disc clamped and chucked to a turntable.

Abstract: A switch includes a repetitive call detection unit which detects a repetitive call which occupies channels in an identical channel group. A release unit releases the channels occupied by the repetitive call when the repetitive call is detected. A restriction unit stores information concerning the repetitive call and imposes a restriction on a connection of a call having information identical to the information concerning the repetitive call. A test unit determines whether a cause of the repetitive call has been removed. A restriction release unit releases the above restriction in accordance with a result of determination by the test unit.

Abstract: A disc player 10 is equipped with a positioning unit 14 that has step plate 54 and positions a disc 1, a clamper unit 15 that has a clamp plate 66 and carries out a clamp operation on the disc positioned by the positioning unit, a drive unit 16 that has a pickup and a turntable 19 on a drive plate 18, and rotates the disc clamped on the turntable by the clamper unit to take information from the disc by the pickup, wherein the positioning unit and the clamper unit are provided separately from each other, and movable vertically to the drive unit.