Table of Contents
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Circuit Flow
Check U103 Pin2
RF_IN
Check U103 Pin4
V_ref
Check U103 Pin1,8
VCC1,2
Check U103 Pin7
RF_OUT
SPECTRUM ANALYZER CONDITION
Waveform
-RBW : 1MHz,VBW: 1KHz
-Span : 60MHz
-Frequency : DCN( 836.52MHz)
U103 Pin2 DCN PAM_IN
NO
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
Check F101 circuit
Check Q101 circuit
Check C206, U201
Replace U103
U103 Pin7 DCN PAM_OUT
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