PURPOSE: To surely perform the disk loading operation, by giving a function which holds judged information until a home position detecting means generates its output after a reproduction is completed, to a size of inserted disk judging circuit.
CONSTITUTION: A switch 38 which is to be used for detecting the home position of a disk holding table is connected to the space between a power source Vcc and an earth and the output of the switch 38 becomes another input of AND gates 361W 36n+1 and, at the same time, also becomes the latch input of an encoder 37. Therefore, only when the disk holding table is at the home position, Q' outputs of FFs 351W35n+1 are inputted into the encoder 37 and the size judging is performed and, at the same time, the judged information of the encoder 37 is held until the disk holding table returns to the home position after a reproduction is completed. Outputs Q1WQn+1 of the encoder 37 are supplied to drivers 391W39n+1 and, at the same time, become the positive logic input of AND gates 401W40n+1, and the drivers 391W39n+1 drive plungers 311W31n+1 connected to the space between the output terminal of the drivers 391W39n+1 and the power source Vcc.
| JP4156397 | Disk device |
| JP4355118 | Disk device |
| JPH07192367 | DISK DRIVING DEVICE |
SATOU KIYOSHI
TAKAHASHI YOSHIO
TAKAHASHI HIDEYUKI
