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LG-ID3100
Circuit Flow
Check U102 TP1(Pin2)
RF_IN
Check U102 TP2(Pin4)
V_ref
Check U102 TP3, TP4(Pin1,8)
VCC1,2
Check U102 TP5(Pin7)
RF_OUT
Waveform
SPECTRUM ANALYZER CONDITION
-RBW : 1MHz,VBW: 1KHz
-Span : 60MHz
-Frequency : DCN( 836.52MHz)
U102 Pin2 DCN PAM_IN
LGE
LG Electronics Inc.
Input Level is Appear?
YES
NO
Is Vref 2.85V ?
YES
NO
Level is
3.2V~4.2V OK?
YES
NO
Output Level
is Appear?
YES
PAM Circuit is OK
See next page to check
Duplexer & Mobile SW
Or Replace QSC6010
26/57
NO
Check F110 circuit
Check Q101 circuit
Check C203, U201
Replace U102
U102 Pin7 DCN PAM_OUT
LGE Internal Use Only
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