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 Pin2
RF_IN
YES
Check U102 Pin4
V_ref
Check F110 circuit
Check Q101 circuit
NO
Level is
3.2V~4.2V OK?
YES
Check U102 Pin1,8
VCC1,2
Check C203, U201
NO
Output Level
is Appear?
YES
Check U102 Pin7
RF_OUT
Replace U102
Waveform
U102 Pin2 DCN PAM_IN
U102 Pin7 DCN PAM_OUT
Summary of Contents for RD3500
Page 2: ...CDMA MOBILE SUBSCRIBER UNIT LG KD3500 SINGLE BAND CDMA MOBILE PHONE SERVICE MANUAL ...
Page 24: ...LG KD3500 LGE LG Electronics Inc 22 21 1 U201 QSC6010 CHAPTER 4 BGA IC Pin Check ...
Page 25: ...LG KD3500 LGE LG Electronics Inc 23 21 2 U310 Memory ...
Page 28: ...Circuit Diagram DP101 DP101 ...
Page 36: ...4 3 2 Charging Trouble Test Points Circuit Diagram CON409 CON409 pin1 ...
Page 47: ...4 3 10 LCD Trouble Test Points Circuit Diagram C O N 3 0 4 CON304 pin3 ...
Page 50: ...CON302 Test Points Circuit Diagram 4 3 11 UIM Trouble R375 R378 R361 R376 ...
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