LG FA162 - Page 41

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