LG HT903WA Service Manual page 31

13. DVD & AMP WAVEFORMS
1)
FL+ : TP611 -> R705
FL- : TP612 -> R710
3)
RL+ : TP603 -> R775
RL- : TP604 -> R780
5)
C+ : TP605 -> R731
C- : TP606 -> R736
LGE Internal Use Only
2)
FR+ : TP609 -> R718
FR- : TP610 -> R722
4)
RR+ : TP601 -> R788
RR- : TP602 -> R792
6)
W+ : TP607 -> R767
W- : TP608 -> R762
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Only for training and service purposes