LG MDV902 Service Manual page 56

B
DOES
THE SLED
MOVE TO INNER SIDE
WHEN IT IS AT OUTER
POSITION?
YES
DO NOT PUT IN DISC
AND TRAY CLOSE.
OPTICAL
LENS IS MOVING
FOR SEARCHING
FOCUS?
YES
C
NO
LIMIT SW SIGNAL
ON P4407 IS LOW?
SLED
SIGNAL IS OK?
CHECK THE CABLE
CONNECTION WITH MECHA.
PROPER
NO
FOCUS OUTPUTS TO
MOTOR DRIVER?
PROPER
F+ & FOUTPUTS?
CHECK CABLE CONNECTION
WITH PICK-UP HEAD.
4-3
NO
YES
NO
YES
NO
YES
NO
YES
CHECK THE MD
CHECK THE RELATED
CIRCUIT OF SLED AND
MOTOR DRIVER IC (IC401)
CHECK FOCUS CONNECTION
ON ES8381 AND MOTOR
DRIVER IC.
CHECK THE MOTOR
DRIVER (IC401).