LG LM-M1030A Service Manual page 18

• READING OK CHECK # E
(= "NO DISC" DISPLAY)
E E E E
DOES TA+ WAVEFORM APPEAR AT
( IC803 PIN17 AND PN801 PIN15)
WAVEFORM #5
TRACKING COIL DRIVE WAVE
YES
CHECK PN802 CONNECTOR LINE
YES
DOES ARF SIGNAL APPEAR?
(IC802 PORT 8)
WAVEFORM #6
YES
DOES FE, TE SIGNAL APPEAR?
(IC802 PORT FE:23, TE:21)
WAVEFORM #6
NO
DOES TAIN- WAVEFORM
APPEAR AT
( IC803 PIN 23)
WAVEFORM #5
TRACKING DRIVE WAVE
NO
NO
NO
NO
- 2-11 -
NO
DEFECTIVE IC801
NO
DEFECTIVE IC803
DEFECTIVE PN802
CONNECTOR
DEFECTIVE PICKUP OR
IC802
DEFECTIVE PICKUP OR
IC802
DEFECTIVE IC801