3-9
This is the waveform of FDO and collector
outputs of Q201 and Q202 when to play DVD
Section A : CD_LD is ON and DVD_LD is OFF
Section B : DVD_LD is ON and CD_LD is OFF
This is the waveform of FDO and collector out-
puts of Q201 and Q202 when to play CD
Section C : CD_LD is ON and DVD_LD is OFF
Section D : CD_LD is OFF and DVD_LD is ON
Section E : CD_LD is ON and DVD_LD is OFF
The waveforms as below indicate “COLLECTOR” outputs of Q201and Q202,
respectively when to play DVD and CD
The waveform is to display FDO siganal from pin 115 IC201 and SPN M+ from pin 14 IC203.
FDO is used to control a focus actuator of pick - up and SPN M+ is used to operate a spindle
motor.
So, we can know the position of the acuator and the speed and rotating direction of the spindle
motor through those signals.
IC201
pin 115
IC201
pin 68
The waveform FDO and SPN M+ when to play
A
B
C
D
E
IC201
pin115
Q201
COLLECTOR
Q202
COLLECTOR
IC201
pin115
Q201
COLLECTOR
Q202
COLLECTOR
15. The status of CD_LD and DVD_LD when to play
16. The status Focus and spindle motor
