Dvd Start-Up Program Flow Chart - Sanyo DC-DVD888 Service Manual

Dvd/vcd personal theater system
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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
Rising Time
data:Tm
Tm : Th1
Tm > Th1
D = 12cm
data:Tm
FG servo
500 rpm
CD Mode
Fofst Adj
pk0 : S-Peak value
Fcs Aji
data:pk0
DVD Mode
Fofst Adj
Fcs Adj
data:pk1 & pk2
Disc diameter identification
Th : Time threshold
Tm < Th1
Th1=300 ms
Th2=155 ms
Tm < Th2
Tm : Th2
Tm > Th2
D = 8cm
NoDisc
Spindle Servo
Start
Gain down
pk1 & pk2 : 1st & 2nd S-Peak value
pk0 : Th0
pk0 < Th0
pk1 : Th1
pk1 < Th1
pk0 < Th0
D-type = CDRW
CD Mode
SGC(pk0)
Fofst Adj
- 20 -
Disc Type identification
Th0 : Level threshold
pk0 > Th0
pk1 > Th1
pk2 > Th2
pk2 : Th2
pk2 < Th2
pk0 < pk1
pk0 : pk1
pk0 > pk1
pk1 : Th1
pk0 : Th0
pk0 > Th0
pk1 < Th1
D-type : Disc Type
D-type = CD
D-type = DVD
DVD Mode
pk2 < Th2
D-type = DVD Single
D-type = DVD Dual
1
pk1 > Th1
SGC(pk1)
Fofst Adj
pk2 : Th2
pk2 > Th2
SGC(pk2)

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