Checking Flow START √ Press “OK” + “0” + “000000” in Phone idle state √ Press “7” FCC Test √ Press “2” CDMA FCC -Set CH384 & AGC 360 √ Spectrum analyzer setting √ Oscilloscope setting 1. Check Power Circuit 2. Check VCTCXO Circuit 9. Check Mobile Switch √ Re-download SW, CAL 3. Check RFT6150 Circuit 6. Check HDET Circuit 7. Check Duplexer 4. Check RF SAW 8. Check Diplexer DCN Tx Trouble 4.2 TX Part Trouble 5. Check PAM Circuit

Check Power Circuit TEST POINT Circuit Diagram Checking Flow +3.0V ? Check U502 Pin15 Regulator Circuit is OK See Next Page YES NO Start Replace U502 U502 15

Check VCTCXO Circuit Circuit Diagram Waveform Checking Flow Similar? VCTCXO Circuit is OK See next page YES +2.8V? Replace X101 NO Check U502 NO Start Check X101 Pin3 Refer to Graph Graph Check X101 Pin4 Test Point X101. 4X101. 3

Check RFT Circuit Test Point Circuit Diagram DCN_RF_OUT TX_ON TCXO SBCKSBDTSBST +2.6V_MSMP2 TX_Q_P/M TX_I_P/M +3.0V_TX TX_AGC_ADJ

Similar? RFT Circuit is OK See next page YES Similar? Check U201 MSM NO Replace U102 NO OK? NO YES Check Regulator Circuit Start Check U102 Pin23 CELL_OUT Refer to Graph (A) Check U102 I/Q Data Pin27. 28, 29, 30 Refer to Graph (B) Check U102 Pin32,6 +2.6V_MSMP2 +3.0V_TX YES ≥2.5V NO Check TX_ON Signal Line & MSM Check U102 Pin1 (TX_ON Signal) Similar? Check SBI Signal Line & MSM NO YES Check U102 Pin 2,3,4 SBCK SBDT SBST Refer to Graph (D) YES Similar? NO Check TCXO Circuit Check U102 Pin15 TCXO Refer to Graph (C) Checking Flow

Waveform SBDT SBCK SBST Graph (D) TX_I_P TX_I_N TX_Q_N TX_Q_P Graph (B) Graph (A)Graph (C)

Replace F Check DCN RF Tx SAW Test Point RF_OUT RF_IN Similar? RF TX SAW is OK See next page YES NO Start Check F102 Pin1,3 RF_IN, RF_OUT Refer to Graph Circuit DiagramWaveform Checking Flow RF_IN RF_OUT Graph

Check DCN PAM Circuit Test Point RF OUTPUT PA_ONVCCRF_INPA_R1 Similar? PAM Circuit is OK See next page YES ≥3.4V Check VCC Line NO Replace U106 NO Start Check U106 Pin2,7 RF_IN / RF_OUT Refer to Graph Check U106 Pin1,8 YES ≥2.5V Check +3.0V_TX Line And PA_ON NO Check U106 Pin4 Checking Flow

Circuit Diagram Waveform RF_IN RF_OUT Graph

Check HDET Circuit Test Point HDET_OUT RF_IN +3.0V_TX Similar? HDET Circuit is OK See next page YES +3.0V? Replace U104 NO Check U502 NO Start Check U104 Pin B2 Refer to Graph Check U104 Pin A1 Circuit Diagram Waveform Checking Flow Graph YES +3.0V? Check R109 NO Check U104 Pin A2

Check DCN Duplexer Test Point ANT_PORT TX_PORT Replace DP1 Similar? Duplexer is OK See next page YES NO Start Check DP1 Pin1,6 TX_PORT, ANT_PORT Refer to Graph Circuit DiagramWaveform Checking Flow ANT_PORT Graph TX_PORT

Check Diplexer Circuit Test Point RF_OUT RF_IN Similar? Diplexer Circuit is OK See next page YES Replace U112 NO Start Check U112 Pin2,6 CELL_PORT ANT_PORT Refer to Graph Circuit DiagramWaveform Checking Flow RF_IN RF_OUT Graph

Check Mobile Switch Test Point RF_IN Check C101, L103, VR100 Similar? Mobile Switch is OK See next page YES NO Start Check U101 Pin2 RF_IN Refer to Graph Circuit Diagram Waveform Checking Flow RF_IN Graph

Checking Flow START √ Press “OK” + “0” + “000000” in Phone idle state √ Press “7” FCC Test √ Press “2” PCS FCC -Set CH600 & AGC 320 √ Spectrum analyzer setting √ Oscilloscope setting PCS Tx Trouble 1. Check Power Circuit 2. Check VCTCXO Circuit 9. Check Mobile Switch √ Re-download SW, CAL 3. Check RFT6150 Circuit 6. Check HDET Circuit 7. Check Duplexer 4. Check RF SAW 8. Check Diplexer 5. Check PAM Circuit

Check Power Circuit TEST POINT Circuit Diagram Checking Flow +3.0V ? Check U502 Pin15 Regulator Circuit is OK See Next Page YES NO Start Replace U502 U502 15

Check VCTCXO Circuit Circuit Diagram Waveform Checking Flow Similar? VCTCXO Circuit is OK See next page YES +2.8V? Replace X101 NO Check U502 NO Start Check X101 Pin3 Refer to Graph Graph Check X101 Pin4 Test Point X101. 4X101. 3

Check RFT Circuit Test Point Circuit Diagram PCS_RF_OUT TX_ON TCXO SBCKSBDTSBST +2.6V_MSMP2 TX_Q_P/M TX_I_P/M +3.0V_TX TX_AGC_ADJ

Similar? RFT Circuit is OK See next page YES Similar? Check U201 MSM NO Replace U102 NO OK? NO YES Check Regulator Circuit Start Check U102 Pin21 PCS_OUT Refer to Graph (A) Check U102 I/Q Data Pin27. 28, 29, 30 Refer to Graph (B) Check U102 Pin32,6 +2.6V_MSMP2 +3.0V_TX YES ≥2.5V NO Check TX_ON Signal Line & MSM Check U102 Pin1 (TX_ON Signal) Similar? Check SBI Signal Line & MSM NO YES Check U102 Pin 2,3,4 SBCK SBDT SBST Refer to Graph (D) YES Similar? NO Check TCXO Circuit Check U102 Pin15 TCXO Refer to Graph (C) Checking Flow

Waveform SBDT SBCK SBST Graph (D) TX_I_P TX_I_N TX_Q_N TX_Q_P Graph (B) Graph (A)Graph (C)

Replace F Check PCS RF Tx SAW Test Point RF_OUT RF_IN Similar? RF TX SAW is OK See next page YES NO Start Check F103 Pin1,3 RF_IN, RF_OUT Refer to Graph Circuit DiagramWaveform Checking Flow RF_IN RF_OUT Graph

Check PCS PAM Circuit Test Point RF OUTPUT PA_ON VCC RF_INPA_R1 Similar? PAM Circuit is OK See next page YES ≥3.4V Check VCC Line NO Replace U107 NO Start Check U107 Pin2,7 RF_IN / RF_OUT Refer to Graph Check U107 Pin1,8 YES ≥2.5V Check +3.0V_TX Line And PA_ON NO Check U107 Pin4 Checking Flow

Circuit Diagram Waveform RF_IN RF_OUT Graph

Check HDET Circuit Test Point HDET_OUT RF_IN +3.0V_TX Similar? HDET Circuit is OK See next page YES +3.0V? Replace U104 NO Check U502 NO Start Check U104 Pin B2 Refer to Graph Check U104 Pin A1 Circuit Diagram Waveform Checking Flow Graph YES +3.0V? Check R109 NO Check U104 Pin A2

Check PCS Duplexer Test Point ANT_PORT TX_PORT Replace DP2 Similar? Duplexer is OK See next page YES NO Start Check DP2 Pin2,3 TX_PORT, ANT_PORT Refer to Graph Circuit DiagramWaveform Checking Flow ANT_PORT Graph TX_PORT

Check Diplexer Circuit Test Point RF_OUT RF_IN Similar? Diplexer Circuit is OK See next page YES Replace U112 NO Start Check U112 Pin2,4 CELL_PORT ANT_PORT Refer to Graph Circuit DiagramWaveform Checking Flow RF_IN RF_OUT Graph

Check Mobile Switch Test Point RF_IN Check C101, L103, VR100 Similar? Mobile Switch is OK See next page YES NO Start Check U101 Pin2 RF_IN Refer to Graph Circuit Diagram Waveform Checking Flow RF_IN Graph