Zenith DVB413 Service Manual page 22

2) Tray open waveform
3) Tray close waveform
FIG 3-2
FIG 3-3
3-13
OPEN(CN203 PIN3)
CLOSE(CN203 PIN4)
LM-(IC201 PIN14)
LM+(IC201 PIN13)
OPEN(CN203 PIN3)
CLOSE(CN203 PIN4)
LM-(IC201 PIN14)
LM+(IC201 PIN13)