LG HT806TGW Service Manual page 77

10) TRACKING CONTROL RELATED SIGNAL(System checking)
FIG 10-1(DVD)
PU_DET
TRO
T-
T+
FIG 10-2(CD)
PU_DET
PU_DET
47
TRO TRO
48
T-
T-
49
T+
T+
50
PU_DET
47
TRO
48
T-
49
T+
50
2-66
47 : This signal can see using special debug program
48
49
50
IC500
47