LG 29FS2AMB/ANX - Manual (Page 17)

TROUBLE SHOOTING
1. No Picture (sound ok)
2. No Sound (picture ok)
YES
YES
NO
NO
NO
CVBS Signal?
(2Vpp)
YES
NO
Check around IC500
YES
NO
Check around Q505, Q506, Q507
YES
<AV1, 2, 3, Component 1 INPUT> <RF>
NO
Waveform of CPT socket cathode
(RK/GK/BK)?
Check IC901G
Check around IC500
Check Tuner(TU101) VIDEO output Check Q003
Waveform of Digital Board IC001
#191?
Waveform of Digital Board IC500
R/G/B/VM OUT0~#65~68?
Check MAIN R118 Waveform
NO
Check around
each Jack
NO
Check around IC001
& Q004, Q005
NO
Check around IC652
NO
Check around
TU101
NO
Check around
IC001
Waveform of MAIN1
Tuner SIF?
YES
YES
YES
Waveform of Digital Board
IC001#9, 10, 11, 12, 13, 14(av1,
2, 3) R598, R599(Component1)
at each Mode?
YES
YES
Waveform of MAIN IC652#1,2(L)
14, 15(R)?
Waveform of Digital Board IC001
#27, 28?
Waveform of Digital
IC001#31?
Waveform of Digital Board IC500
#41, 42, 43, 44?
Waveform of Digital Board P500
#R/G/B_OUT?