Sanyo DVD-9201 Service Manual page 21

DVD P.W.BOARD OPERATION(SIGNAL)
c. In the case of CD Disc
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
b. In the case of 8cm Disc
SPDO
Tm > 155 ms
FG
6 FG = 1 revolution
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