3-11
IC502
CPLD
IC203
Driver IC
Pin 4
Pin 3
Pin 1
Pin 2
Tray-open
Tray-close
MD
Pin 9
Pin 10
LM-
LM+
CPLD send tray - open or tray - close signal to IC203(motor drive IC)
IC203 generates LM+ and LM - and transmits them to operate a loading motor.
if there is no LM+ or LM-, check the Tray-open and Tray-close. And replace the Motor Drive IC .
IC203
pin1
IC203
pin2
A signal flow for tray open and close
The waveform input to IC203 for tray open and close
IC201
IC203
Driver IC
Pin25
Pin26
Pin115
Pick-up
F-
F+
Pin15
Pin16
FDO
FDO is made from focus error signal at DSP(IC201) and is input to IC203.
And then FDO is converted into F - and F+ in IC203.
Finally, they are sent to pick - up to control a focus actuator.
IC201
pin115
IC203
pin15
IC203
pin16
A signal flow for FDO
The waveform of FDO, F- and F+
19. Tray Open and Close
20. Focus Drive signal(FDO)
