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