LG FA162 Service Manual page 41

ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART
5-5. READING OK CHECK #E (= "NO DISC" DISPLAY)
#E
Does
TA+ waveform
appear at (IC400 Pin17)
waveform#5 tracking coil
drive wave.
YES
Check connector
CN403 line.
YES
Does ARF
signal appear?(IC401 Pin2)
waveform #6
YES
Does FE, TE signal appear?
(IC401 Pin10: RFMON, Pin16:TE)
waveform #6
Does
NO
TAIN waveform
appear at (IC400 Pin22)
waveform #5 tracking dirve
wave
Defective IC400.
NO
Defective CN403.
NO
Defective pick-up or IC401.
NO
Defective pick-up or IC401.
3-22
NO
YES
Defective IC401.