Sanyo DC-DVD888 Service Manual page 14

DVD P.W.BOARD OPERATION(SIGNAL)
c. In the case of CD Disc
FE
FDO
FE
SPD
B. Disc diameter identification
a. In the case of 12cm Disc
Spindle kick
SPD
Tm > 300ms
FG
6 FG = 1 revolution
c. In the case of NO Disc
SPDO
Tm < 155 ms
FG
6 FG = 1 revolution
Zoom
FE
FDO
FE
Peak 0
SPD
b. In the case of 8cm Disc
SPDO
FG
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CD laser DVD laser
Peak 1
Peak 0 > Peak 1
Tm > 155 ms
6 FG = 1 revolution