Pioneer PD-6050 Manual de servicio - Página 13

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Pioneer PD-6050 Manual de servicio
• i - 1 . ^
7 0 5 0 . P D - 6 0 5 0
- 5 0 5 0 , P D - 4 0 5 0
4. CIRCUIT DESCRIPTIONS
4 . 1 ACCURATE FOCUS SERVO SYSTEM
As a method (the Accurate Focus System) for re-
ducing the distortion of RF signals read by the
pickup, delays have been applied to the output of 2
photodiodes that precede the quarter photodiodes
and is followed by an addition operation in order to
achieve improvements in frequency responce, dis-
tortion, S/N, and so on as well as to increase the
accuracy of signal reading.
FE
Fig. 4-1
1 3
1