Pioneer PD-6050 Service-Handbuch - Seite 22

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d. Auto focus

Note: This time chart's horizontal axis is not limited to being proportional t o real time.

4.2.2 C X A 1 0 8 1 S

RF A M P

The output voltage of the photodiode that are input

to the input pins (PD1 and PD2) are respectively

subjected to an increase in voltage of about 5 times

into a 58k 12

equivalent resistor at the RF I-V

Amps (1) and (2). Furthermore, addition is per-

formed at the RF Summing Amp so that the output

voltage which has been converted from the currents

of the photodiodes (A + B + C + D) is output

from Terminal R F C

An eye pattern check can be

performed at Terminal RFO.

The low-frequency component of the RFO output

voltage VRFO is as follows:

VRPO

1.8

(VA

VB)

1.8

(58k 0 / 1 2 k

ft)

(VPDA +

VPDB +

VPDC +

VPDD)

2 2