Samsung LRT19US Service Manual page 41

5-9 No Sound(PC)
Does a signal appear at R143,
R144(PC-AL/AR)?
Yes
Does a signal appear at
R759, R760?
Yes
Does a signal appear at
11
R511, R516?
Yes
Does a signal appear at
L500,L501, L503, L504?
12
(SL/SROUT)
Yes
Check the Speaker L/R.
No
Check CN100 and
PC sound input cable.
No
Check related circuit
IC700(TEA6422).
No
Check related circuit
IC701.(VCTI)
No
Check related circuit
IC501.(TPA3002)
5 Troubleshooting
WAVEFORMS
11
12
5-9