| 摘要 |
PCT No. PCT/JP96/00705 Sec. 371 Date Feb. 26, 1997 Sec. 102(e) Date Feb. 26, 1997 PCT Filed Mar. 18, 1996 PCT Pub. No. WO96/29698 PCT Pub. Date Sep. 26, 1996A disc apparatus comprising: an optical pick-up 5 that accesses an optical disc 4 adapted so that the area on the disc is divided into at least one reproduction only area and one recordable area, and information indicating boundary recording track position between the reproduction only area and the adjacent recordable area is recorded; a sled motor 11 that moves the optical pick-up 5 along the radius of the disc; an RF amplifier 7 that generates a traverse signal from a reproduction signal obtained by the optical pick-up 5, which signal level changes every time the optical pick-up 5 traverses the recording tracks at a first setting corresponding to the reproduction only area and a second setting corresponding to the recordable area selected on the basis of a switching signal when the optical pick-up 5 is being moved; a servo circuit that counts, based on the traverse signal, the number of recording tracks over which the optical pick-up 5 has been moved; and a system controller 8 that, when the boundary recording track position exists between the detected current recording track position accessed by the optical pickup 5, and the target recording track position, it outputs the switching signal to the RF amplifier 7 based on the number of movement recording tracks that are detected by a detector of the number of movement recording tracks and that are counted by the servo circuit 9.
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