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Nokia NHM-1 Series Troubleshooting Instructions

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CCS Technical Documentation
NHM-1 Series Transceivers
Troubleshooting instructions
Nokia Corporation.
Issue 1 11/03

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  • Page 1 CCS Technical Documentation NHM-1 Series Transceivers Troubleshooting instructions Nokia Corporation. Issue 1 11/03...
  • Page 2 NHM-1 Troubleshooting instructions CCS Technical Documentation [This page left intentionally blank] Nokia Corporation. Page 2 Issue 1 11/03...

  • Page 3: Table Of Contents

    Flash programming problem ..................41 Phone jammed ......................42 Charging problem ......................43 SIM card reading problem ..................44 Audio problem ......................45 Keypad problem ......................46 Display problem ......................47 Illumination problem ....................48 ACI Accessory problem ....................49 USB problem ......................50 Nokia Corporation. Issue 1 11/03 Page 3...
  • Page 4 NHM-1 Troubleshooting instructions CCS Technical Documentation [This page left intentionally blank] Nokia Corporation. Page 4 Issue 1 11/03...

  • Page 5: Rf Troubleshooting

    Attention: When repairing or tuning transmitter use external DC supply with at least 3A current capability. Set the DC supply voltage to 3.9V and set the jumper con- nector on test jig to "bypass" position. Nokia Corporation. Issue 1 11/03 Page 5...
  • Page 6 - Set Rx/Tx channel to 37 on GSM900 band or 700 on GSM1800 band (Defaults) - Set Tx PA mode to "Free" (Default) - Set power level to 5 (Default = 19) on GSM900 or to 0 (Default = 15) on GSM1800 Nokia Corporation. Page 6 Issue 1 11/03...

  • Page 7: Rf Key Component Placement

    CCS Technical Documentation Troubleshooting instructions RF Key component placement WCDMA PA 19 MHZ XO Duplexer WCDMA Tx VCO WCDMA Rx VCO Antenna switch GSM VCO GSM PA Helgo RFIC Figure 1: RF component placement Nokia Corporation. Issue 1 11/03 Page 7...

  • Page 8: Rf Measurement Points

    J800, RXI RX VCO OUT RX VCO OUT R843 C820 J802, RXQ C820 C813 C872 C872 VR1A VBATT_RF L633 VREFRF01 L635 C575 VCO OUT L634 L636 VANT2 VANT1 Figure 2: RF measurement points Nokia Corporation. Page 8 Issue 1 11/03...
  • Page 9 NHM-1 CCS Technical Documentation Troubleshooting instructions Figure 3: RF measurement points 2 Nokia Corporation. Issue 1 11/03 Page 9...

  • Page 10: Transmitter Troubleshooting Diagram

    Base level ~ 150 Major differences? Check with oscilloscope: Check control loop PA ctrl voltage > 1.5 peak, components, Replace Helgo PA & ant. switch Replace faulty troubleshooting component(s) Figure 4: Transmitter troubleshooting Nokia Corporation. Page 10 Issue 1 11/03...

  • Page 11: Helgo Troubleshooting Diagram

    +26dB Check with RF probe VCO out signal level -10dBm, 3589.6 MHz (GSM900) Synthesizer 3495.6 MHz (GSM1800) troubleshooting Check modulator output components, Replace Helgo Replace faulty component(s) Figure 5: HELGO troubleshooting Nokia Corporation. Issue 1 11/03 Page 11...

  • Page 12: Pa And Antenna Switch Troubleshooting Diagram

    VBATT_RF ~ 4V Tx control lines VTXP = 2.8V components, pulsed VTXLO_G = 0V, Replace faulty Replace PA component(s) Check components around PA, Replace Helgo Replace faulty component(s) Figure 6: PA and antenna switch troubleshooting Nokia Corporation. Page 12 Issue 1 11/03...

  • Page 13: Diagrams Of Transmitter Signals

    VANT_1 at C551, Tx on, burst mode VTX_B_P at C573, Tx on, burst mode VANT_2 at C552, Tx on, burst mode TXP at J502 , Tx on, burst mode TXC at R606/C614, Tx on, burst mode, power level high Nokia Corporation. Issue 1 11/03 Page 13...
  • Page 14 8 9 7 . 4 0 0 M H z S P A N 2 . 0 0 0 M H z Figure 7: Tx out signal, 900 band, burst mode, channel 37 Nokia Corporation. Page 14 Issue 1 11/03...

  • Page 15: Gsm900 & Gsm1800 Receiver

    - Set AGC to "8: FEG ON + 46 dB (Default = "8: FEG ON + 46 dB") - Set Rx/Tx channel to 37 on GSM900 band or 700 on GSM1800 band (Defaults) Apply 942.46771 MHz (channel 37 + 67.710 kHz offset) or 1842.86771 MHz (channel Nokia Corporation. Issue 1 11/03 Page 15...
  • Page 16 GSM900 or GSM1800 receiver: Figure 8: Oscilloscope screen shot Signal amplitude is 152mVpp, DC offset 1,35V, frequency 67 kHz. If this signal is not sen continue to the troubleshooting diagram for : Nokia Corporation. Page 16 Issue 1 11/03...

  • Page 17: Troubleshooting Diagram For Gsm900 Receiver

    **DC-level of RxI/RxQ in continuous mode will decrease slowly. The Spectrunanalyzer: Synthesiszer original level can be 4G VCO out trobleshooting restored by rewriting 3769.6 MHz gain set. –30dBm (* Check Helgo Figure 9: GSM900 receiver troubleshooting Nokia Corporation. Issue 1 11/03 Page 17...

  • Page 18: Troubleshooting Diagram For Gsm1800 Receiver

    +26dB) **DC-level of RxI/RxQ in continuous mode will decrease slowly. The Spectrunanalyzer: Synthesiszer original level can be 4G VCO out trobleshooting restored by rewriting 3769.6 MHz gain set. –30dBm (* Check Helgo Nokia Corporation. Page 18 Issue 1 11/03...

  • Page 19: Gsm Synthesizer

    - Set Active unit to "Rx" (Default = "Rx") - Set Operation mode to "Continuous" (Default = "Burst") - Set Rx/Tx channel to 37 on GSM900 band or 700 on GSM1800 band (Defaults) Nokia Corporation. Issue 1 11/03 Page 19...

  • Page 20: Synthesizer Troubleshooting Diagram

    NHM-1 Troubleshooting instructions CCS Technical Documentation Synthesizer troubleshooting diagram Figure 10: Synthesizer troubleshooting Nokia Corporation. Page 20 Issue 1 11/03...

  • Page 21: Diagrams Of Synthesizer Signals

    3 . 6 1 0 4 0 0 0 G H z S P A N 2 . 0 0 0 M H z 4GHz VCO output, 1800 band, RX on, continuous mode Nokia Corporation. Issue 1 11/03 Page 21...

  • Page 22: Wcdma 2100 Transmitter

    Perform following tests, if problems exist a troubleshooting diagram can be used as a guideline Maximum output signal level and linearity Measure other power levels and gain control linearity Check error vectror magnitude (EVM) In case of synthesizer or LO failure, please refer a synthesizer troubleshooting. Nokia Corporation. Page 22 Issue 1 11/03...

  • Page 23: Wcdma Tx Troubleshooting Diagram

    Z900 SAW filter failed component: Failed component: failed component: Failed component: N902 HEX PA, coupler or N900 TEX N961 , L999, C995 isolator ,open or short circuit in swithcer Figure 11: WCDMA TX troubleshooting Nokia Corporation. Issue 1 11/03 Page 23...
  • Page 24 Check other power levels and gain control linearity over range 21…-15 dBm RBW 3 MHz VBW 10 kHz 21.6 dBm 50 dB SWT 100 ms TRG 21 dBm 1 RM Center 1.9477 GHz 10 ms/ Date: 29.AUG.2003 09:43:21 Figure 13: Other power levels Nokia Corporation. Page 24 Issue 1 11/03...
  • Page 25 Date: 29.AUG.2003 09:33:17 Figure 15: Power sweeps Note! When perform txa2 power sweep, in manual mode control box , change TxA1 val- ues to TxA2 field and TxA2 values to TxA1 field, respectively. Nokia Corporation. Issue 1 11/03 Page 25...

  • Page 26: Wcdma2100 Receiver

    File -> Open product -> NHM-1 From toolbar - Set system mode to “WCDMA” - Set operating mode to "Local" Activate RF controls window from the menu Testing -> WCDMA -> RX Control Nokia Corporation. Page 26 Issue 1 11/03...
  • Page 27 Measure the the test points for balanced RX I- and Q-signals with a oscilloscope. J800 : RX I –signal minus J801 : RX I –signal plus J802 : RX Q-signal plus J803 : RX Q-signal minus Nokia Corporation. Issue 1 11/03 Page 27...
  • Page 28 Signal amplitude should be near 500 mVpp and DC-offset ca. 0.7 V. The signal in test points J800 and J801 should have 180 degrees phase shift, because of balanced operation. Figure 18: J801 test point Nokia Corporation. Page 28 Issue 1 11/03...
  • Page 29 For troubleshooting, -Activate WCDMA RX control from Phoenix menu. Do following settings : - Channel 10700 , - AGC mode “Manual” - LNA State “MID” , - BB AGC “30dB” Activate by pressing “Update” Nokia Corporation. Issue 1 11/03 Page 29...

  • Page 30: Troubleshooting Diagram For Wcdma Receiver

    In this case HP10020A passive 20:1 ( 1kOhm) probe was used --> Check PWB connection This divider causes at least 26 dB from C830&C831 and level offset. C832&C833 to J800…J803 Figure 20: WCDMA RX troubleshooting Nokia Corporation. Page 30 Issue 1 11/03...
  • Page 31 Check again the tespoint J800, signal swing should be nearly ( ca. 10% less) the same as with original settings ( because this LNA gain step nominally is –13 dB from MID to LOW and BB AGC compensates by 12 dB ( =42-30 dB setting difference) the overall gain. Nokia Corporation. Issue 1 11/03 Page 31...

  • Page 32: Wcdma Synthesizers

    Initialize connection to phone. (use FBUS driver when using DAU9S and COMBOX driver when using FPS-8) Select product from the menu File -> Open product -> NHM-1 From toolbar - Set system mode to “WCDMA” - Set operating mode to "Local" Nokia Corporation. Page 32 Issue 1 11/03...

  • Page 33: Wcdma Rx-Synthesizer

    Select from list “Rx PLL lock self-test” and run it. If RX-synthesizer is able to lock, it will “PASS”. If it fails then activate Rx Control from Testing/WCDMA/-menu e.g with following set- tings: Nokia Corporation. Issue 1 11/03 Page 33...

  • Page 34: Wcdma Rx-Synthesizer Troubleshooting Diagram

    Check balun T802 ( not shorted ). OK ?? Check UEM and load for VR1A (note: VR1A is used by GSM synthesizer). Fix T802. Replace G800 VCO module Figure 21: WCDMA Rx synthesizer troubleshooting Nokia Corporation. Page 34 Issue 1 11/03...

  • Page 35: Diagrams Of Wcdma Rx-Synthesizer Signal

    Diagrams of WCDMA RX-synthesizer signal: 19.2 MHz reference clock input in C872 ( REX OSCIN-input ). Figure 22: REX OSCIN input signal WCDMA RX VCO output at 4280MHz: Figure 23: WCDMA RX VCO output at 4280MHz: Nokia Corporation. Issue 1 11/03 Page 35...

  • Page 36: Wcdma Tx-Synthesizer

    If it fails then activate Tx Control from Testing/WCDMA/-menu e.g with following set- tings: Figure 24: WCDMA TX control NOTE: Connect a 50ohm/1W load to antenna connector ! Press “Send” to activate TX. Nokia Corporation. Page 36 Issue 1 11/03...

  • Page 37: Wcdma Tx Synthesizer Troubleshooting Diagram

    - if this doesn’t help change N900 (TEX) Check balun T902. OK (not shorted) ?? Check N950 ( Ext.Reg1). Measure from R940, is the TXVCOPwr enable ON. Fix T902. Replace G900 VCO module Figure 25: WCDMA TX Synthesizer troubleshooting Nokia Corporation. Issue 1 11/03 Page 37...

  • Page 38: Diagrams Of Wcdma Tx-Synthesizer Signal

    NHM-1 Troubleshooting instructions CCS Technical Documentation Diagrams of WCDMA TX-synthesizer signal: Figure 26: 19.2 MHz ref clk input in C902 (TEX OSC IN input) Figure 27: WCDMA TX VCO output at 3900MHz: Nokia Corporation. Page 38 Issue 1 11/03...

  • Page 39: Baseband Troubleshooting

    SIM card SIM card fault Audios doesn´t work Audio faults Keypad Keypad doesn´t work faults Display Display doesn´t work faults Illumination Illumination doesn't work faults ACI detection ACI Accessory doesn´t work faults Continue Nokia Corporation. Issue 1 11/03 Page 39...

  • Page 40: Phone Totally Dead

    Phone is programming <150 mA jammed working OK? Flash fault Phone current ~150 mA Check BSI-line including Is phone in Change UEM X300,C308,R201 LOCAL mode ? and R213. Are they OK? Change defect part Nokia Corporation. Page 40 Issue 1 11/03...

  • Page 41: Flash Programming Problem

    LOW after it has been HIGH? Wrong Change Flash manufactor ID and device ID Is phone totally Phone is dead dead? Phone doesn't Phone is start up or it's jammed jammed? Nokia Corporation. Issue 1 11/03 Page 41...

  • Page 42: Phone Jammed

    Read phone info. Is it OK? Change UEM phone info read from testpoint J115. Is it OK? Measure FBUSTX-signal during phone info read from testpoint Change TIKU J116. Is it OK? Change UEM retest Nokia Corporation. Page 42 Issue 1 11/03...

  • Page 43: Charging Problem

    Check R200. Is R200 with it OK ? empty battery. Is it ~800mA th ACP-1 charger? Change N200 Change defect (UEM). part. Recalibrate all Recalibrate AD converters. harge curreny Retest. d voltage. Retest. Retest Nokia Corporation. Issue 1 11/03 Page 43...

  • Page 44: Sim Card Reading Problem

    (X385,R385, C385). from X385. Is it ~3.0V? If still fail, change UEM. Check SIM lines (X385). If Check SIM power-up OK, change R385. If still fail, sequence. Is it OK? change UEM. Change TIKU Nokia Corporation. Page 44 Issue 1 11/03...

  • Page 45: Audio Problem

    Measure sine signal from C112 , C113 , C114 , C115, earpiece pads. C116 , C117 ,R102 , R104 Is it ~170mVp-p? R109 , R111 , L102. If OK check UEM. retest Continue Nokia Corporation. Issue 1 11/03 Page 45...

  • Page 46: Keypad Problem

    X166. Are voltage level ~1.8V? Change to normal mode. Measure SleepX-signal From testpoint J405 when key is pressed. Change Tiku Is voltage ~1.8 V When keypad pressed, are LED's turned Illumination fault Nokia Corporation. Page 46 Issue 1 11/03...

  • Page 47: Display Problem

    A0, D0-D7, RD, WR X100, X166 and And XRES signals lines again if OK Are voltage levels Change TIKU 1.8V Are the display Illumination fault LED´s working when key pressed or enabled by Phoenix Nokia Corporation. Issue 1 11/03 Page 47...

  • Page 48: Illumination Problem

    C169, C174, C175 and N200 VLED+ =~10.5V VLED- =~0.5V Wen LED driver is enabled. Is it OK? If not OK, change defect part. Check X166 (solder Change defect parts joints). Is it OK? Retest Nokia Corporation. Page 48 Issue 1 11/03...

  • Page 49: Aci Accessory Problem

    Check ACI- line (R103, R207,C118). (pin3). Is it ~0V? If not OK, change defect part and retest. Measure VOUT Check VOUT line (R103, C313,N300) voltage (pin4). Is it ~0V? If not OK, check ACI-line again Retest Nokia Corporation. Issue 1 11/03 Page 49...

  • Page 50: Usb Problem

    Is SOFTCON Vp 0V ? (J119) 1.8V ? Change TIKU Change Is Vpu (J120) N100 3.3 V ? Is D+ high on Check X102 R103 and X102 Change N100, if still fails change TIKU Nokia Corporation. Page 50 Issue 1 11/03...

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