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Nokia Customer Care

NPL-4/5 Series Transceivers

Troubleshooting Instructions

Summary of content (102 pages)

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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Table of Contents Page No RF Troubleshooting.................................................................................................................................. 6 Introduction to RF troubleshooting ................................................................................................ 6 RF Key component placement ..............................................................................................
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care GMSK.................................................................................................................................................. 40 EDGE ................................................................................................................................................... 41 Fault finding chart for GSM1900 transmitter........................................................................
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Magic troubleshooting ......................................................................................................................94 FM Radio Troubleshooting ................................................................................................................. 95 FM radio component layout ............................................................................................................
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Fig 41 FM radio troubleshooting diagram .............................................................................................. 98 Fig 42 Oscilloscope screen shot, Audio output ..................................................................................... 99 Fig 43 FM radio clock from test point J359, 32 kHz frequency clock signal, when radio is on.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions RF Troubleshooting Introduction to RF troubleshooting Measurements should be done using Spectrum analyzer with high-frequency highimpedance passive probe (LO-/reference frequencies and RF power levels) and Oscilloscope with a 10:1 probe (DC-voltages and low frequency signals) The RF-section is built around one RF-ASIC (Helgo N500). For easier troubleshooting, this RF troubleshooting document is divided in to sections.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care RF Key component placement Figure 1: Component placement 1 Page 8 Copyright © 2004 Nokia Corporation. All rights reserved.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions RF Test Points The RF power supplies are generated in the UEM and can be measured either in the Small Signal Chamber or in the Baseband Chamber. On the drawings below small points show the locations of the test points. Figure 2: Picture of the Assembled PWB with Chambers Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Transmitter Figure 4: Transmitter Test Points Synthesizer Figure 5: Synthesizer Test Points Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care RF in General Figure 6: RF Block -Diagram RF block diagram consisting of: Page 12 • RF front-end module • Power amplifier module • RF ASIC • VCTCXO module • VCO module Copyright © 2004 Nokia Corporation. All rights reserved.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions The RF front-end is a triple-band direct conversion transceiver. Using direct conversion, no intermediate frequencies are used for up- or down-conversion.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care RF Power Supply Configuration General Specifications of Transceiver Parameter Unit Cellular System GSM850/900, GSM1800, GSM1900 Modulation schemes GMSK, 8-PSK RX Frequency Band GSM850:824 … 849 MHz GSM900:925 … 960 MHz GSM1800:1805 ... 1880 MHz GSM1900:1930 … 1990 MHz TX Frequency Band GSM850:869 … 894 MHz GSM900:880 … 915 MHz GSM1800:1710 ... 1785 MHz GSM1900:1850 … 1910 MHz Output Power GMSK GSM850:+5 … +33 dBm (3.
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Company confidential Nokia Customer Care Frequency Error, static channel < 0.1 ppm RMS Phase Error < 5.0 ° Peak Phase Error < 20.0 ° Issue 1 05/04 NPL-4/5 Troubleshooting Instructions Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Receiver Verification and Troubleshooting General instructions for RX troubleshooting Connect the phone to a PC, which has Phoenix Service Software and a dongle installed, using either • Repair jig and DAU-9S (RS232) cable or • DAU-9T cable (RS232) or • DKU-5 cable (USB) Connect the phone to a power supply (DC voltage: 4.0V, max. current: 3A) and an RF signal generator. Switch the phone on.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions The set up should now look like this: Figure 8: RSSI Window - Make the following settings on your signal generator: Frequencies: • GSM 850: 869.26771 MHz (channel 190 + 67.710 kHz offset) • GSM 900: 942.46771 MHz (channel 37 + 67.710 kHz offset) • GSM 1800: 1842.86771 MHz (channel 700 + 67.710 kHz offset) • GSM 1900: 1960.06771 MHz (channel 661 + 67.710 kHz offset) 2.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Measuring RX performance using SNR measurement - Start Phoenix Service Software and open FBUS connection. - Select → Scan Product (Ctrl-R) Wait until phone information is shown in the lower right corner of the screen. - Set operating mode to “local mode”.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Figure 9: Signal Measurement - Choose the remaining GSM bands and measure accordingly the procedure described above. Measuring front-end power levels using spectrum analyzer Spectrum Analyzer (SA) level values depend on the probe type and shall be verified by a properly working phone sample. - Start Phoenix Service Software and open FBUS connection.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Measuring analogue RX I/Q signals using oscilloscope Measuring with an oscilloscope on “RXIINN”, (R421) or “RXQINN”, (R423) is recommended only if RSSI reading does not provide enough information. Input level = -60dBm. - Start Phoenix Service Software and open FBUS connection. - Select → Scan Product (Ctrl-R) Wait until phone information is shown in the lower right corner of the screen.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Correct signal amplitudes approximately GSM850/900: ~140-150mVpp GSM1800/1900: ~130-150mVpp Signal frequency 67.7kHz Figure 11: RX IQ Signals RX I/Q, phase difference 90 degrees between signals. RX I/Q-signals measured from R423 (Q-signal), R421 (I-signal) simultaneously. Used channel 37, input signal 942.467 MHz, level –60 dBm at antenna port, AGC setting 12.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care - Check if AGC calibration is within limits - Check if SNR reading is OK. - Use an Oscilloscope to check levels of “RXI” and “RXQ”. The RF ASIC generates only single ended I and Q signals (RXI, RXQ). As the A/D converter in UEM requires two differential signals, an artificial mid voltage is generated from VrefRF02. The BB part is used to measure those signals by means of RSSI reading.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Figure 13: Receiver Fault Chart 2 Are all 3 bands defective? Receiver Fault Chart 2. Continue with single band fault finding. No Yes Figure 14: Receiver Fault Chart 3, 4, 5 Oscilloscope: Check supply voltages of RF ASIC: VR4 = 2.8V No Check supply filter components (C297, C554) and UEM No Check supply filter components (C225, C555) and UEM Receiver Fault Chart 3.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Figure 15: Receiver Fault Chart 6 Oscilloscope: RX IQ levels ok (RXI, RXQ)? No Change RF ASIC (Helgo) No BB error: Check UPP Yes Change RF ASIC (Helgo) Receiver Fault Chart 6. Yes Oscilloscope: RF-BB serial interface ok? Figure 16: Receiver Fault Chart 7 Single band fault finding Select faulty band in Phoenix and continue measurements on dedicated Rx part. Receiver Fault Chart 7. Phoenix: open SNR Measurement Meas.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Figure 17: Receiver Fault Chart 8 Phoenix: Phone: Receiver Fault Chart 8. local mode RF Controls: Active Unit: Op.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care signal VANT3=1, whereas VANT1=VANT2=0. • Signal paths from the antenna switch to the band filters: GSM 850/900:RX1 Æ GSM850 SAW filter (Z808) or Æ GSM900 SAW filter (Z808) • GSM1800: RX2 Æ GSM1800 SAW filter (Z807) • GSM1900: RX3 Æ GSM1900 SAW filter (Z806) The antenna switch has following typical insertion losses in Rx-mode from its input to output ports: • GSM 850/900: 1.3 dB • GSM 1800: 1.6 dB • GSM 1900: 1.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions RX paths of RF ASIC The balanced GSM 850/900 and GSM 1800 RX signals are amplified by one integrated LNA for each band and the subsequent pre-gain stages. The GSM 1900 signal is fed to the pre-gain stage also used for the GSM 1800 signal. After amplification the RX signals are down-converted. The RX paths of the RF ASIC consist of following sub units: • Separate LNAs for each of the bands: GSM 850/900, and GSM1800.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Transmitter General instructions for transmitter troubleshooting Connect the phone to a PC, which has Phoenix Service Software and a dongle installed, using either • Repair jig and DAU-9S (RS232) cable or • DAU-9T cable (RS232) or • DKU-5 cable (USB). Connect the phone to a power supply (DC voltage of 3.9V) and switch the phone on. The value of the DC voltage of 3.9V at the phone battery connector is crucial.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Table 1: Switching States VANT2 VANT3 VANT1 Rx1 Rx2 Rx3 VC1 VC2 VC3 GSM 850/ GSM GSM 900 1800 1900 [Volt] Rx [Volt] [Volt] Rx Rx TX_IN_E GSM TX_IN_D CS Tx1 Tx2 GSM 850/ GSM 900 1800/1900 Tx 0 0 0 0 0 0 0 0 2.7 0 2.7 0 2.7 2.7 0 Tx X X X X X To switch the TX -GSM 1800/1900 path both signals VANT2 and VANT3 have to be activated.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Figure 20: RF Controls Now the measurement setup, which has been built according to the Check synthesizer Operation-chapter, should detect the following output signal of the phone. Pout = +23dBm @ 836.6 MHz If this is not the case, then go to the chapter GMSK for the troubleshooting. Start the preparations as described in chapter Check synthesizer Operation. EDGE Select operation mode to the “local”.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Tx data type:->Alternate TX PA mode:->High TX Power level:->10 Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care The Phoenix window should now look like this: Figure 21: RF Controls Now the measurement equipment should detect the following output signal of the phone: Pout = +24 dBm @ 836.6 MHz If this is not the case, then go to the chapter EDGE for the troubleshooting. Start the preparations as described in Check synthesizer Operation .
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions GMSK Use Phoenix to select TX_Data Type: "1" or "0" TX Power Level: 10 Ch190 Ensure Vbatt=3.9 V Yes Oscilloscope C702 R525 C500 TXP testpoint J504 C553 C574 Yes Oscilloscope C529 TXIOUTP C529 TXIOUTN C530 TXQOUTP C530 TXQOUTN Yes Oscilloscope C713 VC1 VC2 Mode Vdc = 0 Volt Vdc = 1.35 Volt Vdc = 2.78 Volt Vdc = 1.8 Volt Vdc = 2.78 Volt Vdc = 2.78 Volt VREF01 VR2 No Check Base Band 67kHz Vac = 0.4 Vpp, Vdc = 1.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care EDGE Ensure that the GMSK is OK! Use Phoenix to select TX_Data Type: "1" or "0" TX Power Level: 10 Ch190 Ensure Vbatt=3.9 V Yes Oscilloscope C741 IREF01 Mode C702 BOM1 VPCTRL_900 BOM2 VPCTRL_900 0.5 Volt R703 Vdc = 2.78 Volt Vdc= 0 V Vdc= 2.7 V No Check PA N700 Check Power Loop R703 Yes Spectrum analyzer RF-connector Pout = +24 dBm, 836.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions -TX Data Type->Random The setup should now look like this: Figure 22: Band Selection Now the measurement equipment should detect the following output signal of the phone: Pout = +23dBm @ 897.4 MHz If this is not the case, then go to the chapter GMSK for troubleshooting. EDGE Select operation mode to the “local”.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care EDGE:->ON Tx data type->Alternate TX PA mode:->High TX Power level:->10 The setup should now look like this: Figure 23: RF Control Values Now the measurement equipment should detect the following output signal of the phone: Pout = +24 dBm @ 897.4 MHz If this is not the case, then go to the chapter EDGE for the troubleshooting.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions GMSK Use Phoenix to select TX_Data Type: "1" or "0" TX Power Level: 10 Ch37 Ensure Vbatt=3.9 V Yes Oscilloscope R702 R525 C520 TXP testpoint C552 C574 Yes Oscilloscope C535 TXIOUTP C535 TXIOUTN C536 TXQOUTP C536 TXQOUTN Yes Oscilloscope C713 VC1 VC2 VC3 R712 Yes Spectrum analyzer Z700 out, R706 in Mode VREF01 VR2 TXP VR5 VR3 VTXB_900 CONT1 CONT2 CONT3 VPCTRL_90 0 RFin_850/ 900 Vdc = 0 Volt Vdc = 1.35 Volt Vdc = 2.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care EDGE Ensure that the GMSK is OK! Use Phoenix to select TX_Data Type: "1" or "0" TX Power Level: 10 Ch37 Ensure Vbatt=3.9 V Yes Oscilloscope R705 R702 BOM1 VPCTRL_900 BOM2 VPCTRL_900 IREF01 Vdc > Mode 0.5 Volt R703 Vdc = 2.78 Volt Vdc= 0 V Vdc= 2.7 V No Check PA N700 Check Power Loop R703 Check No Base Band Yes Spectrum analyzer RF-connector Pout = +24 dBm, 897.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions -TX Data Type->Random The setup should now look like this: Figure 24: RF Control Values Now the measurement equipment should detect the following output signal of the phone: Pout = +23dBm @ 1747.8 MHz If this is not the case, then go to the chapter GMSK for the troubleshooting. EDGE Select operation mode to the “local”.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Tx data type:->Alternate TX PA mode:->High TX Power level:->5 The setup should now look like this: Figure 25: RF Control Values Now the measurement equipment should detect the following output signal of the phone: Pout = +21 dBm @ 1747.8 MHz If this is not the case, then go to the next chapter for troubleshooting.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions GMSK TX_Data Type: "1" or "0" TX Power Level: 5 Ch700 Ensure Vbatt=3.9V Yes Oscilloscope R702 R525 C500 TXP testpoint C552 C574 Yes Oscilloscope C535 TXIOUTP C535 TXIOUTN C536 TXQOUTP C536 TXQOUTN Yes Oscilloscope C709 VC1 VC2 VC3 R713 Mode VREF01 VR2 TXP VR5 VR3 VTXB_1800 _1900 CONT1 CONT2 CONT3 VPCTRL_18 00_1900 Yes Spectrum analyzer T700 out, R710n Vdc = 0 Volt Vdc = 1.35 Volt Vdc = 2.78 Volt Vdc = 1.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care EDGE Ensure that the GMSK is OK! Use Phoenix to select TX_Data Type: "1" or "0" TX Power Level: 5 Ch700 Ensure Vbatt=3.9V Yes Oscilloscope C742 C702 BOM1 VPCTRL_1800 BOM2 VPCTRL_1800 Yes Spectrum analyzer RF-connector Pout = +21 dBm, 1747.8 MHz Yes GSM 1800 TX OK IREF_1800_ 1900 Vdc > Mode 0.5 Volt R713 Vdc = 2.78 Volt Vdc= 0 V Vdc= 2.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions The setup should now look like this: Figure 26: RF Control Values Now the measurement equipment should detect the following output signal of the phone: Pout = +23dBm @ 1880 MHz If this is not the case, then go to the chapter GMSK for the troubleshooting. EDGE Select operation mode to the “local”.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care TX Power level:->5 The setup should now look like this: Figure 27: RF Control Values Now the measurement equipment should detect the following output signal of the phone: Pout = +21 dBm @ 1880 MHz If this is not the case, then go to the chapter EDGE for the troubleshooting. Fault finding chart for GSM1900 transmitter In the following, it is assumed that the TXP signal is used as trigger-signal.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions GMSK Use Phoenix to select TX_Data Type: "1" or "0" TX Power Level: 5 Ch661 Ensure Vbatt=3.9 V Yes Oscilloscope R702 R525 C500 TXP testpoint C552 C526 Yes Oscilloscope C535 TXIOUTP C535 TXIOUTN C536 TXQOUTP C536 TXQOUTN Yes Oscilloscope C714 VC1 VC2 VC3 R713 Yes Spectrum analyzer T700 out, R710 in Mode VREF01 VR2 TXP VR5 VR3 VTXB_1800 _1900 CONT1 CONT2 CONT3 VPCTRL_18 00_1900 Vdc = 0 Volt Vdc = 1.35 Volt Vdc = 2.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care EDGE Ensure that the GMSK is OK! Use Phoenix to select TX_Data Type: "1" or "0" TX Power Level: 5 Ch661 Ensure Vbatt=3.9 V Yes Oscilloscope C742 C702 BOM1 VPCTRL_1900 BOM2 VPCTRL_1900 Yes Spectrum analyzer RF-connector Pout = +21 dBm, 1880 MHz Yes GSM 1900 TX OK Page 46 IREF_1800_ 1900 Mode Vdc > xx Volt R713 Vdc = 2.78 Volt Vdc= 0 V Vdc= 2.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Synthesizer Check synthesizer operation Start Phoenix Service Software and open FBUS connection. Select “Scan Product” (Ctrl-R or in menu File - Scan Product). Wait until phone information is shown in the lower right corner of the screen. Set “operating mode” to “Local”.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care The VCO frequency is twice the Rx frequency in the GSM1800 band: fVCO = 2 * fRX = 2 * 1842.8 MHz = 3685.6 MHz. The VCO frequency shall be measured at VCO output. The tuning voltage can be easily measured at the Vc input of the VCO. The voltage shall be measured at C503. The tuning voltage should be 2.1VDC .. 2.6VDC at fVCO = 3685.6MHz. The tuning sensitivity of the VCO is typically 250MHz/V.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions • Reference frequency for the PLL synthesizer. • System clock for BB (signal VCTCXO = 26 MHz, output REFOUT of the Helgo ASIC N500). For an error free initial synchronization, the 26MHz frequency of the reference oscillator must be accurate enough. Therefore, an analog voltage with signal name AFC tunes the oscillator.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Fault finding chart for PLL synthesizer Setup with Phoenix: Band: GSM 1800 Mode: RX Continuous Channel: 700 BB not working because 26MHz missing. For a failure free working of BB the 26MHz clock is necessary! If the 26MHz clock is not working please check first the necessary voltage VR3. This can be checked after power on for a time of about 32sec. After that time the voltage is going down.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Pictures of synthesizer signals Figure 29: 26 Mhz at G501 Pin Out Figure 30: 26 MHz RFCLK at R420/C420 Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Figure 31: VCO Output, 1800 Band, RX on, Continuous Output Page 52 Copyright © 2004 Nokia Corporation. All rights reserved.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Frequency tables GSM850 Frequency list GSM850 CH TX RX VCO TX VCO RX CH TX RX VCO TX VCO RX 128 824.2 869.2 3296.8 3476.8 190 836.6 881.6 3346.4 3526.4 129 824.4 869.4 3297.6 3477.6 191 836.8 881.8 3347.2 3527.2 130 824.6 869.6 3298.4 3478.4 192 837.0 882.0 3348.0 3528.0 131 824.8 869.8 3299.2 3479.2 193 837.2 882.2 3348.8 3528.8 132 825.0 870.0 3300.0 3480.0 194 837.4 882.4 3349.6 3529.6 133 825.2 870.2 3300.8 3480.8 195 837.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care GSM900 (including EGSM900) Frequency list EGSM900 CH TX RX VCO TX VCO RX CH TX RX VCO TX VCO RX 975 880.2 925.2 3520.8 3700.8 1 890.2 935.2 3560.8 3740.8 976 880.4 925.4 3521.6 3701.6 2 890.4 935.4 3561.6 3741.6 977 880.6 925.6 3522.4 3702.4 3 890.6 935.6 3562.4 3742.4 978 880.8 925.8 3523.2 3703.2 4 890.8 935.8 3563.2 3743.2 979 881.0 926.0 3524.0 3704.0 5 891.0 936.0 3564.0 3744.0 980 881.2 926.2 3524.8 3704.8 6 891.2 936.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions GSM1800 CH 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 TX 1710.2 1710.4 1710.6 1710.8 1711.0 1711.2 1711.4 1711.6 1711.8 1712.0 1712.2 1712.4 1712.6 1712.8 1713.0 1713.2 1713.4 1713.6 1713.8 1714.0 1714.2 1714.4 1714.6 1714.8 1715.0 1715.
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NPL-4/5 Company confidential Troubleshooting Instructions 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 1721.8 1722.0 1722.2 1722.4 1722.6 1722.8 1723.0 1723.2 1723.4 1723.6 1723.8 1724.0 1724.2 1724.4 1724.6 1724.8 1725.0 1725.2 1725.4 1725.6 1725.8 1726.0 1726.2 1726.4 1726.6 1726.8 1727.0 1727.2 1727.4 1727.6 1727.8 1728.0 1728.2 1728.4 1728.6 1728.8 Page 56 1816.8 1817.0 1817.2 1817.4 1817.6 1817.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions GSM1900 CH 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 TX 1850.2 1850.4 1850.6 1850.8 1851.0 1851.2 1851.4 1851.6 1851.8 1852.0 1852.2 1852.4 1852.6 1852.8 1853.0 1853.2 1853.4 1853.6 1853.8 1854.0 1854.2 1854.4 1854.6 1854.8 1855.0 1855.
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NPL-4/5 Company confidential Troubleshooting Instructions 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 1862.0 1862.2 1862.4 1862.6 1862.8 1863.0 1863.2 1863.4 1863.6 1863.8 1864.0 1864.2 1864.4 1864.6 1864.8 1865.0 1865.2 1865.4 1865.6 1865.8 1866.0 1866.2 1866.4 1866.6 1866.8 1867.0 1867.2 1867.4 1867.6 1867.8 1868.0 1868.2 1868.4 1868.6 1868.8 Page 58 1942.0 1942.2 1942.4 1942.6 1942.8 1943.0 1943.2 1943.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions DC Supply Current Check For a quick check of DC power supplies refer to the diagram below. Voltage drops are measured at the respective resistors pads. Note, that not all currents can be checked in such a way, see the marking (not applicable) in the diagram. Figure 32: DC Power Supply Diagram UEM 4.78 V [ 4.6V ... 4.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Baseband Troubleshooting BB measurement points Figure 33: NPL-4/5 BB Measurement Points, Top Page 60 Copyright © 2004 Nokia Corporation. All rights reserved.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Figure 34: NPL-4/5 BB Measurement Points, Bottom Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Troubleshooting diagrams The following diagrams describe baseband troubleshooting: START: Start Phone is totally dead Yes Phone is dead Yes Flash faults Yes Phone is jammed No Flash programming doesn't work No Phone doesn't startup or the phone is jammed No Charging doesn't work Yes Charger fault No Phone doesn't read SIM card Yes SIM card fault Yes Audio faults No Audio doesn't work No Keypad doesn't work Yes
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Phone is dead. Phone is dead Phone current is zero? Yes Check X100 No Phone current is <50mA Yes Is phone flash proramming OK Yes Phone is jammed No No Flash faults Is phone in LOCAL mode No Check BSI line, X100, C100, R203, C220,R206 OK? Yes Change UEMEk Yes No Repair Ok retest Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Phone is jammed 1 Phone is jammed Measure VIO, VCORE, VFLASH1, VANA, VR3 voltages. Are they OK ? No Measure 32kHz SleepClk from testpoint J404. No Is it OK ? No Check B200,C209, C210 Yes Yes No Yes Measure PURX signal from testpoint J402. Is it HIGH (1.8V) ? Measure 32kHz SleepClkfrom B200. Is it OK ? Check L260-265, L206, C260-265, C283, C295 Check BSI/BTEMP lines.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Phone is jammed 2 Phone is jammed 2 Phone Shutdown after 30s Change UPP No No Measure DBUSClk 1MHz signal from testpoint J413. Is it OK ? No Yes Read phone info. Is it OK ? Yes No Measure FBUSRx signal during phone info read from testpoint J412. Is it OK ? No Change UEMEk Yes Measure FBUSTx signal during phone info read from testpoint J411.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Flash faults 1 Flash faults Phone doesn't set FlashBus TxD line HIGH after the startup? Yes No Measure BSI pulse during Flash programming. Is it OK? No Check BSI line, X100, C100, R203, C220, R206 Yes Measure FBusTx line during Flash programming (TP 411) Is it HIGH (1.8V)? No Check FBUSTx line.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Flash faults 2 Flash faults 2 Wrong manufacturer ID or Device ID Yes Change Flash No Phone is totally dead Yes Phone is dead No Phone doesn't start up or phone is jammed Yes Phone is jammed No Retest Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care SIM card faults SIM card faults Insert SIM card faults No Yes Set phone to LOCAL mode. Is it OK ? No Check BSI line, X100, C100, R203, C220, R206. If OK change UEMEk No Check VSIM line,X386, C203,C390,C391. If OK change R388. If still wrong VSIM change UEMEk. No Check SIM lines C392, R389. If OK change R388. If still fail change UEMEk. Yes Check X386 Measure VSIM voltage from X386. Is it 3V (1.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Charger faults Charger faults Connect (ACP-7) charger Battery bar doesn't scroll ? No Retest No Check X101(whole PopPort assembly, V100, C106, C110, F100, L100 and lines. No Check R110, C120, C240, R207 and lines. No Check R200 if ok change UEMEk Yes Measure voltage over (TVS) V100. Is it >3.0V ? Yes Read BTEMP value. Compare 25C temp. ambient value ~290-330 ? Yes Remove fuse F100 and measure current.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Display faults 1 Try to change Display module. Does it Yes work now ? Display faults Fault in display module. Retest Set phone to LOCAL mode. Set VBATT to 4.2V. Start Display test with Phoenix. Set display lights ON Are display light (LED) turned on ? Yes No No Check CALLED1 (N300/8 and DLIGHT (V314/IN).Are they HIGH ? No Check CALLED1 and DLIGHTlines.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Display faults 2 Display faults 2 Does the display start ? No Yes Try to change Display module. Does it Yes work now ? Fault in display module. Retest No Measure VDDI/J301 (2.78V) and VDD/J300 (1.8V).Are they OK ? No Check lines of VFLASH1 and VIO. If lines are OK change UEMEk No Check display control lines. If OK change UPP Yes Check signals RESX/J306, SDA/J305,SCLK/J307, CSX/J304.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Audio fault1 Audio faults Is earpiece working ? No Try to change UImodule. Is it working now ? Check earpiece contact springs from old UI-module and change earpiece to old UI-module. Yes Retest. No Yes Change old UI -module back. Use Phoenix audio test. Set EXT IN, HP OUT, LOOP ON Measure DCvoltage levels from speaker pads. Is it ~1.36V ? Check L150, C155, R151, R152 and lines. If OK change UEMEk.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Audio fault 2 Audio faults 2 Is microphone working ? No Try to change new C-cover assembly. Is it working now ? Yes Check mic contact springs from old C-Cover assembly. If not OK change PopPort assembly to old C-cover. Retest. No Yes Restore old C-cover. Set phone to LOCAL mode. Using Phoenix Audiotest set HP IN, EXT OUT, LOOP ON Measure MICB1voltage from J110 pad. Is it ~2.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Audio fault 3 Audio fault 3 Set phone to local mode with Phoenix (audio control). IHF speaker working ? Set buzzer ON, vol "9" and freq. to 1kHz. Measure shutdown DClevel from J150. Is it 1.8V? Change UPP (D400) Retest Measure signal level from IHF pads to GND.
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Company confidential NPL-4/5 Troubleshooting Instructions Nokia Customer Care Keyboard faults 1 Keyboard faults Is the powerkey working? Yes No Measure voltage from S302. Is it HIGH? No Check R306, C310, S302 and POWERONX line. If OK change UEMEk Yes Measure voltage from S302 when powerkey is pressed. Is it HIGH ? No Phone is jammed Yes Check S302. Is it OK ? No Change S302 Yes Keyboard faults 2 Issue 1 05/04 Phone is dead Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Keyboard faults 2 Keyboard faults 2 Try to change UI -module. Is it working now ? Yes Faulty UI-module. Retest No Is UI-module keymatrix working ? No No Check ROW0-4 lines, X301. If OK change Z300. If still fails change UPP. Measure SLEEPX signal from J403 when key No pressed. Is it ~1.8V ? Check ROW0-4 lines, X301. If OK change Z300. If still fails change UPP. Measure ROW0-4 lines from X301.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Keyboard faults 3 Keyboard faults 3 Measure ROW0 line from S300. Is it ~1.8v ? Is volume up key working ? Yes Check S300, S301, S303 and lines. If OK change Z300. If still fail change UPP No No Yes Measure COL0 from S300 when key is pressed. Is there 50us pulse ? No Check S300 and COL0 lines. If OK change Z300. If still fail change UPP Yes Change UPP Is volume down key working ? Yes No Measure ROW1 line from S301.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Keyboard faults 4 Keyboard faults 4 Is PTT key working ? No Measure ROW4 line from S303. Is it ~1.8v ? Yes Check S303, S300, S301 and lines. If OK change Z300. If still fail change UPP Yes No Measure COL0 from S300 when key is pressed. Is there 50us pulse ? No Check S300 and COL0 lines. If OK change Z300. If still fail change UPP Yes Change UPP Keyboard faults 5 Page 78 Copyright © 2004 Nokia Corporation.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Keyboard faults 5 Keyboard faults 5 Set phone to LOCAL mode. Set VBATT to 4.2V. Start Display test with Phoenix. Set "Keyboard lights" ON Try to change UI -module. Is it working now ? Are keyboard & display light (LED) turned on ? Yes No Yes UI-board failure. Retest No Check CALLED1 (N300/8 and DLIGHT (V314/IN).Are they HIGH ? No Check CALLED1 and KLIGHT lines.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Accessory faults1 Accesory if faults Non-ACI accessory detected and No working? Insert mono headset (HDB-4) Check ACI line trans.HIGH to LOW (<0.6V) ? No Check PopPort connecor pin 3(ACI) and line to systemboard, L106,R103,R102, R109, C103. If OK change UEMEk. Retest. No Check PopPort connecor pin 3(ACI) and line to systemboard, L106,R103, R102, R109, C103. If OK change UEMEk.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Figure 35: MBUS VheadInt 4a VFLASH1 1 Mono Headset is recognized. Vhead_min 4 20ms 2 1a 3 3a Vlow 1. Accessory is connected (insertion & removal resistor connect to ACI line) 1a) phone gets HeadInt interrupt after 20ms check that ACI line is still low (
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Accessory faults 2 Accesory if faults ACI accessory detected and working? Yes No Insert stereo headset (HDS-3) Wait 5s Measure Vout levelPopPort connector pin 4. Is it ~2.8V No Check PopPort connecor pin 4(Vout)) and line to systemboard, L107, C112, R103 and C290. If ok change UEMEk. Retest No Check PopPort connecor pin 3 (ACI) and line to systemboard, L106,R103, R102, R109, C103. If OK change UEMEk. Retest.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Figure 36: ACI Diagram VheadInt VFLASH1 RESET 1 2a Learning Sequence 4 Vhigh Normal ACI communication 7 9a 9 6 Vhead_min 8 Vaci_detect Vlow 1a 2 3 5 1. Accessory is connected (insertion & removal resistor connect to ACI line) 1a) phone gets HeadInt interrupt after 20ms check that ACI line is still low (
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Flashlight faults Flashlight faults Set phone to LOCAL mode. Set VBATT to 4.2V. Start Display test with Phoenix. Set "Flashlight" ON Check CALLED1 (N300/8 and CALLED2 (V320/IN).Are they HIGH ? Are flashlight (LED) turned on ? Yes Yes Measure voltage over C304. Is it typ. 9.1V ? No Check lines of CALLED1 and CALLED2. If lines are OK change UEMEk No C302,C303,L300,V30 0, R310, R302,R300, C304.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Self tests Self tests If any self test is failed, contact service information will be shown on display. Set phone to LOCAL mode Use Phoenix BB Self Tests. Run All Self test show now what test are failed. Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care FCI troubleshooting F C I fa u lt T ry to c h a n g e U I-m o d u le YES R e te s t OK? END NO O pen phone C h e c k th a t F C I re la te d c o m p o n e n ts a re p la c e d c o rre c tly (Z 3 0 1 , L 3 1 0 , L 3 1 1 , L 3 1 2 , L 3 1 3 , C 3 3 0 , C 3 3 1 ). C h e c k a ls o th a t X 3 0 1 c o n n e c to r s p rin g s n o .
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Compass Troubleshooting start compass funtion start No MagIC problem Yes Calibration function is successful No Calibration problems 1 No sensor problems 1 No sensor problems 2 No calibration problems 2 Yes raw value readings are succesful Yes raw value follows phone rotating Yes heading angle value is sensible Yes end Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Calibration 1 calibration 1 calibration place is flat No Yes Rotating speed is suitable No Yes calibration place is undisturbed No fix and recalibrate go to start Yes go sensor problem 1 Page 90 Copyright © 2004 Nokia Corporation. All rights reserved.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Calibration 2 calibration 2 Rotate phone with compass on. Heading values are linear ? No Set phone to flat level and recalibrate No Remove external and internal activities and recalibrate Yes Immobile phone heading value is steady and calm? Yes Retest, go to start problems anymore? Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Sensor problems 1 sensor problems 1 Check capacitors C314 and C318 Exist and ok? No fix the problem Yes Check S/R pulses and VBridge voltage level As specified? No Change MagIC N302 Yes raw values of x,y are on the range ? No Check PWB connection and if nessessary change the sensor N303 Yes Retest, go to start problems anymore? Page 92 Copyright © 2004 Nokia Corporation. All rights reserved.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Start calibration start external undistur bance verified No revove disrupting object or function and recalibrate Yes calibration values of x and y and on the range ? No recalibrate Yes internal disruption removed, raw values are linear? No stop call, charging and other intensive actions and relicalibrate Yes retest, go to start problems anymore? Issue 1 05/04 Copyright © 2004 Nokia Corporation.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Magnetometer output interface testpoints Channel A output J331(+), J332(-), Channel B output J329(+), J328(-) - Difference voltage is normally 0.0V between (+) and (-) - Referred to ground output voltage is 1.1V typ. (1.0V to 1.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Check difference of offset strap coil - difference of measured values must be range of 320 to 420digit for both channels Check Set/Reset pulses and VBridge voltage - measure with oscilloscope - S/R pulses and Vbridge voltages are active only during the measurement phase Check measurement bridges output voltages - Voltages referred to ground must be near 1.1V and difference signal 0.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Magic troubleshooting magic check VIO voltage is 1.8V check UEME, this is not compass functionality problem No Yes Check VCOMP voltage during MagIC active is it 2.8V No Check regulator N971, this is not compass functionality problem Yes MagIC starts? No Change MagIC N302 Yes Retest, go to start problems anymore? Page 96 Copyright © 2004 Nokia Corporation. All rights reserved.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions FM Radio Troubleshooting FM radio component layout Figure 38: Component placement Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Figure 39: Trace layout. Figure 40: FM radio block layout. Components L103, L104, L105, C107, C108, C109, C117, C162, C163, R164, R165, R166 and R167 are not shown in the picture. Those components are placed in baseband section, near audio amplifier N150. Page 98 Copyright © 2004 Nokia Corporation. All rights reserved.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions FM radio troubleshooting diagram Notes to "FM radio troubleshooting diagram" Use 1MHz 1X probe when measuring Audio and clock signals with oscilloscope. Use active RF probe when measuring frequencies with spectrum analyzer. Note 1. RF test signal parameters: - Amplitude, A, –67.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Figure 41: FM radio troubleshooting diagram Set phone into local mode. Start FM radio. NO Does the radio start ? Check C374, C375, R375, NO R358 and measure R372 32kHz clock signal from J359, retest starting. Start OK ? Measure voltages from pins 7 and 34, is it –2.7 V ? Retest starting. Start OK now ? NO YES YES YES NO YES Check R164, R165, R166, R167, L103,L104 Measure signal from J103 and J104. Is it 0.015–0.
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Company confidential Nokia Customer Care NPL-4/5 Troubleshooting Instructions Diagrams of FM radio signals Figure 42: Oscilloscope screen shot, Audio output Signal 1: Audio output from PWB test points J103 and J104, with FM test signal, volume 100%. Signal 2: Audio output from FM radio pins 22 and 23(same as in C162 and C163), with FM test signal Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved.
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NPL-4/5 Company confidential Troubleshooting Instructions Nokia Customer Care Figure 43: FM radio clock from test point J359, 32 kHz frequency clock signal, when radio is on. 15:51:49 03 JUL 2002 REF -20.0 dBm MKR 97.9280 MHz -71.03 dBm #AT 0 dB PEAK LOG SWEEP CONT SGL FREE RUN 10 dB/ VIDEO LINE WA SB EXTERNAL CORR SC FS SYNC CRD CENTER 98.0000 MHz #RES BW 10 kHz SPAN 300.0 kHz #SWP 1.