LG HT552TH Service Manual page 39

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3. TRAY OPEN/CLOSE SIGNAL
1) Tray open/close waveform
2) Tray close waveform
FIG 3-1
FIG 3-2
3-12
OPENSW(P4402 PIN3)
CLOSESW(P4402 PIN4)
OPEN(IC401 PIN 1)
CLOSE(IC401 PIN 2)
OPENSW(P4402 PIN3)
CLOSESW(P4402 PIN4)
OPEN(IC401 PIN 1)
CLOSE(IC401 PIN 2)

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