Sanyo DCS-AVD8501 Service Manual page 10

DVD P.W.BOARD OPERATION (SIGNAL)
B. Focus In and Focus Jump
RF
FDO
FE
Focus In
C. Tracking Servo
a. TE (Tracking Error) Signal.
RF
TE
TE Curve
b. Track Jump Signal
One Track Jump
Cross point
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RF
FDO
Kick pulse
FE
Focus Jump
16 Track Jump
Brake pulse
Zero cross point