Dvd Start-Up Program Flow Chart - Sanyo DCS-AVD8501 Service Manual

DVD START-UP PROGRAM FLOW CHART

(This is a basic start-up program flow chart.)
1. Disc Identification
Start
Vref
compensation
Kick
Spindle
not yet
one rev
done
data:Tm
Tm >Th1
YES
D = 12cm data:Tm
FG servo
500 rpm
CD Mode
Fofst Adj
Fcs Aji
data:pk0
DVD Mode
Fofst Adj
Fcs Adj
data:pk1 & pk2
Disc diameter identification
Rising Time
Th : Time threshold
NO
Th1=246 ms
NO
Tm > Th2
YES
D = 8cm
NoDisc
Spindle Servo
Start
Gain down
pk0 : S-Peak value
pk1 & pk2 : 1st & 2nd S-Peak value
Th0 : Level threshold
pk0 > Th0
YES
NO
pk2 > pk1/3
YES
D-type = DVD Dual
D-type = DVD Single
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Disc Type identification
NO
NO
pk0 > pk1
YES
D-type = DVD
D-type = CD
DVD Mode
CD Mode
SGC(Layer1)
SGC
data:pk1&pk2
NO
pk2 > Th0
D-type = DVD Dual
DVD Mode
SGC(Layer0)
Fofst Adj
1
D-type :
Disc Type
YES