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A100 Training Course

A100 Training Course. RF. Presentation Outline. Block Diagram Key Component Schematic Test Points Layout and Placement. A100 Block Diagram-RF. RX. TX. A100 TX Trace - Key Components I. U1201 P/N : CX74963(Skyworks) Function : Transceiver(Transmitter & Receiver) Check items

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A100 Training Course

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  1. A100 Training Course RF

  2. Presentation Outline • Block Diagram • Key Component • Schematic • Test Points • Layout and Placement

  3. A100 Block Diagram-RF RX TX

  4. A100 TX Trace - Key Components I • U1201 • P/N : CX74963(Skyworks) • Function : Transceiver(Transmitter & Receiver) • Check items • 1. TX IQ : pin 18~21(Oscillo-scope) • 2. TXVCO : GSM_pin54, DCS/PCS_pin55(RF probe) • U1101 • P/N : CX77324(Skyworks) • Function : Power Amplifier • Check items • 1. Vapc : pin 22 (Oscillo-scope) • 2. PA output : GSM_pin12, DCS/PCS_pin17 • (RF probe+Attenuator)

  5. A100 TX Trace - Key Components II • U1107 • P/N : SHSM085TJ (Hitachi Metals) • Function : T/R Switch(Tx, Rx, band selection ) • Check item • 1. Control logic : pin8, pin2, pin4 (Oscillo-scope) • 2. RX : GSM_pin7, DCS_pin5 , PCS_pin3 (RF probe) • 3.TX : GSM_pin11, D/PCS_pin1 (RF probe + Attenuator) • 4. Ant : pin9 (RF probe+Attenuator)

  6. A100 RX Trace-Key Components I • U1107(T/R Switch) • U1261 • P/N : SAFEJ942MAL0F00R05(Murata) • Function : Band pass SAW filter(GSM band selection) • Check item : Input_pin1, output_pin3(RF probe) • U1271 • P/N : FAR-F6EA-1G8425-D2A(Fujitsu) • Function : Band pass SAW filter(DCS band selection) • Check item : Input_pin1, output_pin3(RF probe)

  7. A100 RX Trace- Key Components I • U1272 • P/N : EFCH1960TCB7(Panasonic) • Function : Band pass SAW filter(PCS band selection) • Check item : Input_pin1, output_pin3(RF probe) • U1201 • P/N : CX74963(Skyworks) • Function : Transceiver(Transmitter & Receiver) • Check item • 1. RX IQ : pin 48~51(Oscillo-scope) • 2. UHFTUNE : pin 45(Oscillo-scope)

  8. RX IQ GSM TX DCS/PCS TX GSMRX DCSRX PCS RX TXIQ A100 RF Schematic- I

  9. GSM TX DCS/PCS TX GSMRX DCSRX PCS RX A100 RF Schematic- II

  10. TX IQ PCS SAW 26MHz VCTCXO DCS SAW TRANSCEIVER CX74963 T/R SWITCH GSM SAW RX IQ TP 9 10 TP 4 3 2 1 PA CX77324 LDO NCP4523 A100 RF Layout and Placement-Bottom

  11. TP6 TP 8 TP 5 TP 7 A100 RF Layout and Placement-TOP

  12. A100 RF Test Points

  13. RF Troubleshooting DUT Connect With tester 1.check Tx path 2.check Rx path Enter RF test mode PASS Fail Auto-calibration PASS Check 1.antenna 2.antenna match Change failed component Fail Fail Enter RF test mode RF section is ok, please check SW/ BB section PASS Check: 1.TX Path(CxxOT) 2.RX Path(CxFxx,CxGxx) See error code

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