LG LM-M540 Service Manual page 17

READING OK CHECK (= "NO DISC" DISPLAY)
CONNECTOR LOCKING
CHECK(PN801,PN802)
YES
DOES SLED MOVE ?
YES
DOES LENSE MOVE ?
(= UP & DOWN)
YES
DOES LASER LIGHT ?
YES
DOES SPINDLE ROTATE ?
YES
IS READING OK ?
NO
A A A A
CHECK PN802 PIN 3,4( SL+,SL-)
NO
B B B B
CHECK PN801 PIN 13,16
( FA-, FA+)
NO
C C C C
CHECK PN802 PIN 10( LD )
NO
D D D D
CHECK PN802 PIN
5,6( SP+,SP-)
NO
E E E E
CHECK PN801 PIN 14,15
(TA- ,TA+)
- 2-13 -
DEFECTIVE PICKUP OR
IC803 OR IC801 OR IC802
DEFECTIVE PICKUP OR
IC803 OR IC801
DEFECTIVE PICKUP OR
IC802
DEFECTIVE PICKUP OR
IC803
DEFECTIVE PICKUP OR
IC803 OR IC801 OR IC802