Pioneer CDX-M12 Service Manual page 56

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(5) Focus servo system
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FOCUS SIGNAL FLOW
(IC601)
a) In-focus
In the in-focus sequence, the lens is driven into a focus
S-curve (approx. 10 um) to close the servo loop onan in-
GAIN
TIME CONSTANT
Fig. 29
72
Fig. 28
FE F2C
—— Setting a threshold
Fig. 30