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A100 Training Course

A100 Training Course. RF. Presentation Outline. Block Diagram Key Component Schematic Layout and Placement. X300 Block Diagram-RF. RX. TX. X300 TX Trace- Key Components I. U1201 P/N : CX74963(Skyworks) Function : Transceiver( Trans mitter & Re ceiver ) 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 • Layout and Placement

  3. X300 Block Diagram-RF RX TX

  4. X300 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) • 3. UHFTUNE : pin 45(Oscillo-scope) • 4. TXVCOTUNE : pin 56(Oscillo-scope) • 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. X300 TX Trace-Key Components I • U1102 • P/N : LMSP54CA-142 (Murata) • Function : T/R Switch(Tx, Rx, band selection ) • Check item 1. Control logic : pin2, pin4, pin10 (Oscillo-scope) 2. RX : GSM_pin11, DCS_pin1 , PCS_pin3 (RF probe) 3.TX : GSM_pin7, D/PCS_pin5 (RF probe + Attenuator) 4. Ant : pin9 (RF Probe + Attenuator)

  6. X300 RX Trace - Key Components I • U1102(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 : B9019 (Epcos) • Function : Band pass SAW filter(DCS band selection) • Check item : Input_pin1, output_pin3(RF probe)

  7. X300 RX Trace - Key Components II • 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. X300 RF Schematic- I RX IQ GSM TX DCS/PCS TX GSMRX DCSRX TXIQ PCS RX

  9. X300 RF Schematic- II GSM TX DCS/PCS TX GSMRX DCSRX PCS RX

  10. X300 RF Layout and Placement U1102 T/R SWITCH U1261 GSM SAW U1271 DCS SAW U1101 Power Amplifier U1272 PCS SAW U1201 Transceiver U1173 LDO U1291 26MHz VCTCXO

  11. 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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