The Status Of Cd_Ld And Dvd_Ld When To Play; The Status Focus And Spindle Motor - LG GoldStar DVD5185 Service Manual

15. The status of CD_LD and DVD_LD when to play

The waveforms as below indicate "COLLECTOR" outputs of Q201and Q202,
respectively when to play DVD and CD
A
C

16. The status Focus and spindle motor

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
pin115
Q201
COLLECTOR
Q202
COLLECTOR
B
IC201
pin115
E
Q201
COLLECTOR
D
Q202
COLLECTOR
The waveform FDO and SPN M+ when to play
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
3-9
IC201
pin 115
IC201
pin 68