LG LM-K3960A Service Manual page 44

D
FOCUS ON OK?
Y
N
TRACKING OK?
Y
N
DISC PLAY?
Y
E
N
PROPER SIGNAL ON
A,B,C,D FROM MD?
Y
PROPER FOO SIGNAL
ON IC401?
Y
CHECK CABLE CONNECTION
BETWEEN PDM01 AND MD.
PROPER TRO SIGNAL
ON IC401?
Y
T+&T-OUTPUT
PROPERLY?
Y
CHECK CABLE CONNECTION
ON PICK-UP HEAD.
CHECK RF SIGNAL WAVE-
FORM.
- 3-5 -
N
CHECK THE CONNECTIONS BETWEEN
PDM01 AND PICK-UP HEAD.
N
CHECK THE RELATED CIRCUIT OF ES8381
FOCUS SIGNAL.
CHECK THE RELATED CIRCUIT BETWEEN
N
IC401 AND ES8381
N
CHECK THE TRACKING CONTROL
ON MOTOR DRIVER (IC401).