LG VX9100 Service Manual page 73

VX9100
4.2.1.6 Check Quintplexer (DCN)
Copyright © 2007 LG Electronics. Inc. All right reserved
Only for training and service purposes
Checking Flow
Checking Flow
Start
Check TP1 , TP2
at DP 100 . Referring to
Figure 4.2.1(j)
Is it similar ?
NO
Check TP2 , TP3
at DP 100 . Referring to
Figure 4.2.1(j)
Is it similar ?
NO
Check TP1 , TP3
at DP 100 . Referring to
Figure 4.2.1(j)
Is it similar ?
NO
Replace DP 100 , U103
Waveform
Waveform
Tx Port
Figure 4.2.1(j)
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Quintplexer,
Coupler are OK
YES
Replace U103
(coupler)
YES
Replace DP100
(Quintplexer)
YES
ANT Port
LGE Internal Use Only