LG LM-U360 Service Manual page 34

I READING OK CHECK #A (= "NO DISC" DISPLAY)
A
DOES SL+ WAVEFORM
APPEAR AT ( IC802 PIN13
AND PN 802 PIN3) WAVE-
FORM #2 SLED MOTOR
WAVE
CHECK PN802
CONNECTOR LINE
DEFECTIVE PICKUP
SLED MOTOR
DOES SLIN WAVEFORM
APPEAR AT ( IC802 PIN5)
WAVEFORM #2 SLED
DRIVE WAVE
DEFECTIVE IC802
DEFECTIVE PN802
CONNECTOR
- 2-27 -
DEFECTIVE IC801