Pioneer PD-6050 Manuale di servizio - Pagina 24

Sfoglia online o scarica il pdf Manuale di servizio per Lettore CD Pioneer PD-6050. Pioneer PD-6050 31.

FOCUS OK CIRCUIT

The Focus OK circuit functions to create the window

for the timing of switching ON the Focus Servo from

the Focus Search status.

With respect to the RF signal of Pin ©

both its HPF

signal and the reciprocal of the LPF output (inverted

phase) from the Focus OK Amp output are obtained

at Pin © .

The Focus OK output is inverted in the case below:

VRF. - VRFO =

-0.39

MIRROR CIRCUIT

Fig. 4-15

Fig. 4-16

After amplifying the RFI signal, the Mirror circuit

performs Peak Hold and Bottom Hold.

Peak Hold will hold the peak value at a time

constant that is capable of tracking even a 30 kHz

Traverse signal, whereas Bottom Hold will hold the

bottom value at a time constant that is capable of

tracking even the envelope fluctuations of revolving

cycles.

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