Dvd P.w.board Operation; Dvd P.w.board Operation(Signal) - Sanyo DCS-AVD8501 Service Manual

DVD P.W.BOARD OPERATION (SIGNAL)
(This is a basic signal.)
1. RF and Defection Signal
Each signal shown refers to WIRING ,SCHEMATIC DIAGRAM and Table of monitor signals.
A. RF Signal during play mode.
RF
RF of DVD disc
B. Defection Signal (Detection of level down signal)
RF
PH
BH
DEFECT
Scratched defect
2. Servo and Tray Control
A. S-Curve signal by Focus search
RF
FDO
FE
S-Curve of DVD Single Layed disc
RF
RF
PH
BH
DEFECT
RF
FDO
FE
Zero cross point
- 20 -
RF of CD disc
Interruption defect
S-Curve of DVD Dual Layed disc