12
RX
D-M9
09/LS
-M9
09
NO
NO
Check the laser power circuit between
ES8390 and power transistor.
(Q405, Q406)
YES
YES
Check cable connection
between P400 and pick-up head.
Put disc in tray.
Laser turns on
when reading
disc?
YES
YES
DVDLD or CDLD
output properly?
NO
Check the related circuit of laser
power transistor.
YES
Collector
voltage of power transistor
is ok? (Q405, Q406)
NO
NO
Check the SPINDLE related
circuit on ES8390.
Check the cable connection
between P404 and MD.
Does SPINDLE
rotate?
YES
YES
YES
Proper SPINDLE
signal on ES8390.
NO
Check the SPINDLE control of
motor driver (IC401).
SPIN+&SPIN- output
properly?
B
C
NO
NO
Check the connections between
P400 and pick-up head.
YES
YES
Check cable connection
between P400 and MD.
Focus On OK?
YES
YES
Proper signal on
A,B,C,D from MD?
NO
Check the related circuit of
ES8390 FOCUS signal.
YES
Proper FOD signal on
IC401?
NO
NO
Check the related circuit
between IC401 and ES8390.
Check cable connection on
pick-up head.
Tracking OK?
YES
YES
YES
Proper TRD signal on
IC401?
NO
Check the Tracking control
on motor driver (IC401).
T+ & T- output
properly?
NO
Check RF signal waveform.
Disc play?
C
D
Note: This shooting is the original circuitry so there are some different points from RXD-M909.
TROUBLESHOOTING