Nokia NEM-4 Series Troubleshooting Instructions
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Nokia NEM-4 Series Troubleshooting Instructions

Nokia NEM-4 Series Troubleshooting Instructions

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Customer Care Solutions
NEM-4 Series Transceivers
6 Troubleshooting Instructions
Copyright  2003 Nokia Corporation
Issue 1 09/2003
Page 6(a)-1
Company Confidential

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Summary of Contents for Nokia NEM-4 Series

  • Page 1 Customer Care Solutions NEM-4 Series Transceivers 6 Troubleshooting Instructions Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-1 Company Confidential...
  • Page 2 NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation Copyright  2003 Nokia Corporation Page 6(a)-2 Issue 1 09/2003 Company Confidential...

  • Page 3: Table Of Contents

    TX Path of the transmitted EGSM900 signal ............79 General instructions for GSM1800/1900 TX Troubleshooting .........83 DCS 1800/PCS 1900 Tx fault finding flow chart ............83 Path of the transmitted GSM1800/1900 signal ............84 Copyright Nokia. All rights reserved.. Draft 2 8/2003 Page 1...
  • Page 4 RF tuning after repairs ....................99 RX Calibration (incl. VCXO Calibration) ..............99 RX AGC limits ......................104 RX Band Filter Response Compensation ..............107 TX Power tuning ......................114 TX I/Q Tuning ......................116 Bluetooth Troubleshooting ..................130 Copyright Nokia. All rights reserved. Page 2 Draft 2 8/2003...

  • Page 5: Introduction To Nem-4 Troubleshooting

    If liquid damage, stop repairing! Flash phone before disassembling it if fault is not obvious and Phoenix connection is OK. Disassemble phone: Check failed module visually: Mechanical damages? Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-3 Company Confidential...

  • Page 6: Nominal Current Consumption

    Measurements have been made with a current probe connected to an oscilloscope. Operating Mode Current Consumption Idle 2W audio call 350mA (LOCAL MODE) MP3 playback nominal 80mA FM-radio playback nominal 25mA Copyright  2003 Nokia Corporation Page 6(a)-4 Issue 1 09/2003 Company Confidential...

  • Page 7: Troubleshooting Paths

    Company Confidential NEM-4 CCS Technical Documentation BB Troubleshooting Troubleshooting paths Dead or jammed device Disassemble display Check UI connector Replace display UI module Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-5 Company Confidential...

  • Page 8: Partially Damaged Device

    Symptoms related to energy management “Phone does not stay on” ”Charging is not working” ”Time is lost during battery change” ”Charging takes too long” ”Operating time is very short” Copyright  2003 Nokia Corporation Page 6(a)-6 Issue 1 09/2003 Company Confidential...

  • Page 9: Asic Is Changed

    VCOREA enable (N261 EN, UEMRST) J900 VHPA enable (N266 EN, GENIO14) J901 VAUD (N265 EN, GENIO25) J903 VAUX2 enable (N264 EN, GENIO16) J218 GENTest0 J004 N330 (Boomer) _SHUTDOWN (from WD2 GENIO8) Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-7 Company Confidential...
  • Page 10 GPIO11 (Keyboard matrix COL3) J117 GPIO8 (Keyboard matrix COL0) J180 GPIO9 (Keyboard matrix COL1) J181 GENIO1 (ROCKER1) J145 GENIO2 (ROCKER2) J182 GENIO10 (ROCKER3) J194 GENIO28 (MUSIC PL KEY) Copyright  2003 Nokia Corporation Page 6(a)-8 Issue 1 09/2003 Company Confidential...
  • Page 11 J593 N470 A2 J910 N470 EN2 J911 N470 EN1 J568 USB PU ? J569 USB D+ J575 USB D- J398 VBAT (After current sense monitor) R382 J902 N301Zint Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-9 Company Confidential...

  • Page 12: Contact Service" On Display

    PC connected. These test and the items included are as follows: If some selftest is failed, see relevant chapter in this Troubleshooting document. Copyright  2003 Nokia Corporation Page 6(a)-10 Issue 1 09/2003...

  • Page 13: Baseband Hw Subarea Troubleshooting

    C226, R220 and R385 line low after the programming startup Is it ok? Change Measure FBUSTX line during flash programming is it 1.8V? Memory faults page Change UPP Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-11 Company Confidential...
  • Page 14 Check flash0 bypass caps, check "Flash informs Vpp connection to flasher, Check about a failure" Vpp resistor (R314, 4.7k) Vpp resistor(4.7k) during flashing Ok->Change flash0 Retest ADSP Flashing Copyright  2003 Nokia Corporation Page 6(a)-12 Issue 1 09/2003 Company Confidential...

  • Page 15: Adsp Flashing Troubleshooting

    ADSP flash environment consists of ADSP, ADSP flash, EMIF (external memory interface), communication interfaces (USB and UPP/UEM), ADSP flash protecting control and power supplies for ADSP and ADSP flash. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-13 Company Confidential...

  • Page 16: Energy Management Troubleshooting

    UEM D190 (pin number C2) If phone boots to TEST or LOCAL mode with normal battery, BSI is short circuited to ground. Check EMI-filter and filtering capacitors, which are located to BSI. Copyright  2003 Nokia Corporation Page 6(a)-14 Issue 1 09/2003...
  • Page 17 C301, C302 & C313 (R433) PURX (J125) 1.8V? Check Vcorea See next page and Vmema voltages, OK? Check sleep Meas. from (J123) clock (J124) C197, OK? 32.768Khz? Check B190, C196, C197 Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-15 Company Confidential...
  • Page 18 NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation VCOREA Troubleshooting Copyright  2003 Nokia Corporation Page 6(a)-16 Issue 1 09/2003 Company Confidential...
  • Page 19 Company Confidential NEM-4 CCS Technical Documentation BB Troubleshooting VMEMA Troubleshooting Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-17 Company Confidential...
  • Page 20 NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation Audio Power Troubleshooting Copyright  2003 Nokia Corporation Page 6(a)-18 Issue 1 09/2003 Company Confidential...
  • Page 21 In SLEEP mode the VCXO is off. UEM generates low frequency clock signal (32.768 kHz) that is fed to UPP_WD2, Bluetooth and ZOCUS. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-19 Company Confidential...
  • Page 22 If charger is not NMP approved type and its current and voltage is not within NMP charger window then software does not start charging and there is “NOT CHARGING” on the display. Voltage should be between 5.3V - 9.5V and current between 200mA – Copyright  2003 Nokia Corporation Page 6(a)-20 Issue 1 09/2003...
  • Page 23 BB Troubleshooting 900mA Remove and reconnect battery and charger few times before you start to measure device. This check ensures that the fault really exists. (Refer to “Charging Troubleshooting”) Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-21 Company Confidential...
  • Page 24 NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation Figure 3: Charging Troubleshooting Phoenix and JBV1/MJF26 Check BL5-C, Btemp, BSI, X381, X606, R385, R404 Copyright  2003 Nokia Corporation Page 6(a)-22 Issue 1 09/2003 Company Confidential...
  • Page 25 C388 and C387. Is it V383 and L381. V381 and L380 >3.0Vdc? Check R191 Check R191, and Z190. is it OK? Are they ok? Replace Replace R191 R190/Z190 and and retest retest. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-23 Company Confidential...
  • Page 26 Inspect BSI line and components in it (R385, Pull-up resistor R220). If these are OK, change UEM. BSI Gain over limits: Inspect BSI line and components in it (R385, Pull-up resistor R220). If these are OK, change UEM. Copyright  2003 Nokia Corporation Page 6(a)-24 Issue 1 09/2003 Company Confidential...
  • Page 27 NOTE: IF Vbatt Scaled and Divided unit results are different default calibration values are used. In this case perform EM-calibration to get full performance of phone. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-25 Company Confidential...
  • Page 28 Measure voltage of backup battery during charging, It should arise if it is not 3.2V, yet. When the voltage is over 2.0V for sure, check backup battery with Phoenix. -> In not OK then D190 is faulty. Ensure that the RTC is running. Copyright  2003 Nokia Corporation Page 6(a)-26 Issue 1 09/2003 Company Confidential...
  • Page 29 The clock supplied to the card is in GSM system 1.083 MHz or 3.25 MHz. The data baudrate is SIM card clock frequency divided by 372 (by default), 64, 32 or 16. Copyright  2003 Nokia Corporation Issue 1 09/2003...
  • Page 30 Measured with 3Vsim Figure 5: SIM answer to reset. SIM answer to reset CH1 = SIM_CLK CH2 = SIM_RST CH3 = SIM_I/O CH4 = SIM_PWR Measure points SIM connector Copyright  2003 Nokia Corporation Page 6(a)-28 Issue 1 09/2003 Company Confidential...
  • Page 31 CCS Technical Documentation BB Troubleshooting Figure 6: SIM Clk 3.25MHz. SIM_Clk_3.25MHz CH1 = SIM_CLK Measure points SIM connector Remember to check the two PHOENIX test cases before changing UPP!!!! Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-29 Company Confidential...
  • Page 32 Are the signals present? present? Change SIM ASIP, R496 Analyse signals & look for errors in rise / fall times due Problem solved? to wrong fitted / faulty passives Copyright  2003 Nokia Corporation Page 6(a)-30 Issue 1 09/2003 Company Confidential...

  • Page 33: Audio Troubleshooting

    Company Confidential NEM-4 CCS Technical Documentation BB Troubleshooting Audio Troubleshooting Figure 7: Audio routing window in Phoenix Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-31 Company Confidential...
  • Page 34 NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation Microphone Copyright  2003 Nokia Corporation Page 6(a)-32 Issue 1 09/2003 Company Confidential...
  • Page 35 Company Confidential NEM-4 CCS Technical Documentation BB Troubleshooting Earpiece Check that holes are not coated. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-33 Company Confidential...
  • Page 36 NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation Copyright  2003 Nokia Corporation Page 6(a)-34 Issue 1 09/2003 Company Confidential...

  • Page 37: Headset Troubleshooting

    Company Confidential NEM-4 CCS Technical Documentation BB Troubleshooting Headset Troubleshooting Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-35 Company Confidential...
  • Page 38 NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation Copyright  2003 Nokia Corporation Page 6(a)-36 Issue 1 09/2003 Company Confidential...

  • Page 39: Memory Troubleshooting

    Phoenix window during flashing if flash1 or flash 2 is failing. Id's are however displayed on the Phoenix window and successful read of flash1 id's can be checked from there. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-37...

  • Page 40: Mmc Troubleshooting

    NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation MMC Troubleshooting Copyright  2003 Nokia Corporation Page 6(a)-38 Issue 1 09/2003 Company Confidential...
  • Page 41 Company Confidential NEM-4 CCS Technical Documentation BB Troubleshooting Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-39 Company Confidential...
  • Page 42 NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation USB Troubleshooting Copyright  2003 Nokia Corporation Page 6(a)-40 Issue 1 09/2003 Company Confidential...

  • Page 43: Vibra

    Change UEM while Vibra is switched noise? Check C134, C135, V132 and V131 Change the Vibra Vibra works and retest. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-41 Company Confidential...

  • Page 44: Zocus

    UI function. If the problem is due to the display or keymat PWB the whole UI module should be replaced. However, the earpiece maybe replaced. (see Audio Troubleshooting) Copyright  2003 Nokia Corporation Page 6(a)-42 Issue 1 09/2003...

  • Page 45: Keymat Backlight

    UI module. Note: that it is possible for an LED to be non-functional and for all other LEDs to still be working. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-43...

  • Page 46: Keyboard

    NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation Keyboard If keyboard doesn’t work, follow the Troubleshooting flow chart below: Copyright  2003 Nokia Corporation Page 6(a)-44 Issue 1 09/2003 Company Confidential...

  • Page 47: Display Blank

    Display ok Display ok Display Display Check test points Check test points J113, J114, J113, J114, J185-J191 J185-J191 Change V101 Change V101 Z130 Z130 Change Change UPPWD2 UPPWD2 Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-45 Company Confidential...

  • Page 48: Backlight Does Not Turn On

    NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation Backlight does not turn on Figure 8: Copyright  2003 Nokia Corporation Page 6(a)-46 Issue 1 09/2003 Company Confidential...

  • Page 49: Fm Radio Troubleshooting

    Company Confidential NEM-4 CCS Technical Documentation BB Troubleshooting FM Radio Troubleshooting FM Radio component layout Figure 9: Component placement Figure 10: Trace layout. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-47 Company Confidential...
  • Page 50 BB Troubleshooting CCS Technical Documentation Figure 11: FM radio block layout. Components C001 and C002 are not shown in the picture. Those components are placed near audio connector X002. Copyright  2003 Nokia Corporation Page 6(a)-48 Issue 1 09/2003 Company Confidential...

  • Page 51: Fm Radio Troubleshooting Diagram

    Use active RF probe when measuring frequencies with spectrum analyzer. Note 1. RF test signal parameters: - Amplitude, A, –67.0 dBm - Carrier frequency, f , 98,000 MHz ∆ - Deviation, f, 75 kHz Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-49 Company Confidential...
  • Page 52 NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation - Modulating frequency f , 1,000 kHz (RF generator internal) - FM stereo, mode R=L, pilot state ON Copyright  2003 Nokia Corporation Page 6(a)-50 Issue 1 09/2003 Company Confidential...
  • Page 53 C162 and C163. Both OK ? Change N500 N356. Measure signal from J103 and J104. Is it OK ? E Nokia Corporation Change OK, RETEST IN FLALI radio module TB4 Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-51 Company Confidential...
  • Page 54 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 C017 and C018), with FM test signal Copyright  2003 Nokia Corporation Page 6(a)-52 Issue 1 09/2003 Company Confidential...
  • Page 55 #VBW 10 kHz #SWP 20.0 msec Figure 17: VCO frequency from FM radio pins 3 and 4, the other ends of V500 and V501, with FM test signal Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(a)-53 Company Confidential...
  • Page 56 NEM-4 Company Confidential BB Troubleshooting CCS Technical Documentation Copyright  2003 Nokia Corporation Page 6(a)-54 Issue 1 09/2003 Company Confidential...

  • Page 57: Rf Troubleshooting

    Most RF semiconductors are static discharge sensitive. ESD protection must be taken into account during repair (ground straps and ESD soldering irons). Mjoelner RF ASIC is moisture sensitive. Therefore, Mjoelner RF ASIC must be pre-baked prior to soldering. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(b)-53 Company Confidential...

  • Page 58: Rf Key Component Placement

    PCN and GSM1800 will be used for the mid band. PCS and GSM1900 will be used for the high band. RF Key component placement Figure 1: RF key component placement Copyright  2003 Nokia Corporation Page 6(b)-54 Issue 1 09/2003 Company Confidential...

  • Page 59: Rf Measurement Points

    RF power supplies are generated in the UEM and can be measured either in the Mjoelner can or in the baseband can. Arrows mark the measurement points inside the pictures. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(b)-55...
  • Page 60 Measurement points are indicated on the picture below. Figure 3: Rx I and Q measurement points Figure 4: Rx measurement points at Rx SAW filters and Mjoelner RF ASIC Copyright  2003 Nokia Corporation Page 6(b)-56 Issue 1 09/2003 Company Confidential...
  • Page 61 Measurement points are shown in the picture below, Figure 5: Tx measurement points inside PA can (bottom side of PWB) Figure 6: Tx measurement points on the top side of PWB Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(b)-57...

  • Page 62: Rf In General

    The RF supports HSCSD (High Speed Circuit Switched Data) and GPRS (General Packed Radio Service), meaning multi-slot operation, this will not require special equipment or procedures in repair situations. Copyright  2003 Nokia Corporation Page 6(b)-58 Issue 1 09/2003 Company Confidential...
  • Page 63 DCS: 1805-1880 MHz PCS: 1930-1990 MHz 3420- 3980 26 MHz XTal DCS: 1710-1785 MHz LPRFCLK PCS: 1850-1910 MHz RFCLK EGSM: 880-915 MHz I-signal Q-signal Figure 8: RF frequency plan Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(b)-59 Company Confidential...
  • Page 64 NEM-4 Company Confidential RF Troubleshooting CCS Technical Documentation Figure 9: RF Block diagram Copyright  2003 Nokia Corporation Page 6(b)-60 Issue 1 09/2003 Company Confidential...

  • Page 65: Rf Power Supply Configuration

    External VCO supply (13mA) (2.78V) 26MHz Buffer, logic : Vddbbb(0.7mA), (1.8V) Vddl (1uA) VREF01 Bias Reference : VBEXT(-10uA) (1.35V) PA, Bluetooth VBAT Figure 10: RF Power distribution diagram Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(b)-61 Company Confidential...

  • Page 66: Receiver

    GSM 900 or GMS 1800 or GSM 1900 Active unit Operation mode Burst RX/TX Channel 37 or 700 or 661 Select Testing alt-S RSSI reading The setup should now look like this: Copyright  2003 Nokia Corporation Page 6(b)-62 Issue 1 09/2003 Company Confidential...
  • Page 67 Wait until phone information is shown in the lower right corner of the screen. Set operating mode to local mode Select Testing alt-S RF Controls Wait until the RF Controls window pops up Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(b)-63 Company Confidential...
  • Page 68 Press Start. A window pops up, e.g. for EGSM900 band: Connect an external signal generator to the RF connector of the phone and set the gen- erator as told in the window, taking care for external cable losses. Copyright  2003 Nokia Corporation Page 6(b)-64 Issue 1 09/2003...
  • Page 69 80dBm Start Phoenix Service Software Select Scan Product Ctrl-R Wait until phone information shows in the lower right corner of the screen. Set operating mode to local mode Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(b)-65 Company Confidential...

  • Page 70: Receiver Fault Finding

    Set signal generator frequency to 942.47MHz for EGSM, 1842.87MHz for DCS 1800 or 1960.07MHz for PCS 1900. Set signal generator amplitude to -60dBm. Note:That checking the RF inputs to SAW filters Z602, Z603 & Z604 will be extremely difficult with Copyright  2003 Nokia Corporation Page 6(b)-66 Issue 1 09/2003 Company Confidential...
  • Page 71 Rectify S/C L701, L702 Inductor L703. OK? Refer to BB Replace Fault Finding Mjoelner Receiver is working correctly. Test With Test With Inspect / Check Spectrum Analyzer Oscilloscope Action Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(b)-67 Company Confidential...

  • Page 72: Rx Signal Paths

    PWB to the EGSM900 SAW filter (Z604). From RX2-DCS output the GSM1800 RX signal is routed to the GSM1800 SAW filter (Z602). From RX3-PCS output the RX GSM1900 signal is routed to the GSM1900 SAW filter (Z603). Copyright  2003 Nokia Corporation Page 6(b)-68 Issue 1 09/2003...
  • Page 73 • Two PREGAIN amplifiers, one for EGSM900 and one common for GSM1800 and GSM1900. • Two passive I/Q mixers (MIX), one for EGSM900 and one common for GSM1800 and GSM1900. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(b)-69 Company Confidential...

  • Page 74: Transmitter

    TX power. Use the automatically selected channel. Set Operation Mode to ‘Burst’. Choose the Power level you want the phone to operate at. Copyright  2003 Nokia Corporation Page 6(b)-70 Issue 1 09/2003 Company Confidential...
  • Page 75 Diagnose as per fault finding flow chart. Note:Be careful when selecting the operation mode, if ‘Continuous’ is selected prolonged transmission may damage the phone. Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(b)-71 Company Confidential...
  • Page 76 NEM-4 Company Confidential RF Troubleshooting CCS Technical Documentation Copyright  2003 Nokia Corporation Page 6(b)-72 Issue 1 09/2003 Company Confidential...
  • Page 77 Company Confidential NEM-4 CCS Technical Documentation RF Troubleshooting Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(b)-73 Company Confidential...
  • Page 78 NEM-4 Company Confidential RF Troubleshooting CCS Technical Documentation Figure 12: Mjoelner Can Tx Test Points TX Analog I & Q Data, C715 & C716 Copyright  2003 Nokia Corporation Page 6(b)-74 Issue 1 09/2003 Company Confidential...
  • Page 79 Company Confidential NEM-4 CCS Technical Documentation RF Troubleshooting TXP & TXC Lines during Transmission Copyright  2003 Nokia Corporation Issue 1 09/2003 Page 6(b)-75 Company Confidential...
  • Page 80 NEM-4 Company Confidential RF Troubleshooting CCS Technical Documentation [This page intentionally left blank.] Copyright  2003 Nokia Corporation Page 6(b)-76 Issue 1 09/2003 Company Confidential...
  • Page 81 CCS Technical Documentation RF Troubleshooting TXP / TXC Mask Power Control Loop On Baseband Generated Reference for EGSM Power Level 19 Figure 1: EGSM TX Can Test Points Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-77 Company Confidential...
  • Page 82 CCS Technical Documentation VTXB_900 (EGSM V802 Pre-Amp Biasing Waveform) Only Biases V802 for duration of TX Pulse. EGSM Transmit Waveform (Burst, Power Level 19) Phone drew 140mA during Burst operation Copyright  2003 Nokia Corporation. Page 6(b)-78 Issue 1 09/2003 Company Confidential...

  • Page 83: Tx Path Of The Transmitted Egsm900 Signal

    The components can be grouped into blocks and drawn as shown below. Note that the following picture shows both EGSM900 transmitter (bottom) and GSM1800/ GSM1900 transmitter (top). Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-79 Company Confidential...
  • Page 84 The EGSM900 output is controlled by the power control loop. From the EGSM900 output of the PA the RF signal is fed through the directional coupler (one of the power control loop components) to the antenna switch. Copyright  2003 Nokia Corporation. Page 6(b)-80 Issue 1 09/2003...
  • Page 85 Mjoelner RF ASIC using the control signals CONT1, CONT2 and CONT3. The following table shows the possible different states. CONT1 CONT2 CONT3 EGSM DCS/PCS DCS Rx PCS Rx EGSM Tx [Volt] [Volt] [Volt] Figure 2: Antenna Switch Test Points Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-81 Company Confidential...
  • Page 86 The transmit signal has been checked with a spectrum analyzer at RF connector, X602 and was found to be too low or non-existent. • The VCO is running correctly. Copyright  2003 Nokia Corporation. Page 6(b)-82 Issue 1 09/2003 Company Confidential...

  • Page 87: General Instructions For Gsm1800/1900 Tx Troubleshooting

    The Power Amplifier is getting a correct VBATRF supply via L805 & L809. • Mjoelner’s supply voltages VR1A, VR2, VR3, VR4, VR5 & VR7 are all working cor- rectly. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-83 Company Confidential...

  • Page 88: Path Of The Transmitted Gsm1800/1900 Signal

    The GSM1800/GSM1900 part of the PA has a maximum output of app. 33dBm. The sup- ply is coming directly from the Battery connectors. The output is controlled by the power control loop. From the output of the PA the signal Copyright  2003 Nokia Corporation. Page 6(b)-84 Issue 1 09/2003...

  • Page 89: Fault Finding Chart For Gsm1800/Gsm1900 Transmitter

    If the Tx output is too high, then it is most likely that there is a problem within the Power Control loop. Mjoelner is receiving the Reference TXC from Baseband and not getting any feedback Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-85...

  • Page 90: Nem-4 Synthesizer

    General instructions for Synthesizer Troubleshooting Connect the phone to a PC with DAU-9P cable and dongle and follow these instructions: Start Phoenix Service Software (dongle needed): Open FBUS connection Copyright  2003 Nokia Corporation. Page 6(b)-86 Issue 1 09/2003 Company Confidential...
  • Page 91 Wait until the RF Controls window pops up Set the synthesizer to the following mode: Select Band GSM 900 Active unit Operation mode Continuous RX/TX Channel The setup should now look like this: Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-87 Company Confidential...
  • Page 92 VCO is 240MHz/V typ.). Figure 3: PLL Synthesizer Test Points If this is not the case, then go to Fault finding chart in this document for Troubleshoot- ing. Copyright  2003 Nokia Corporation. Page 6(b)-88 Issue 1 09/2003 Company Confidential...
  • Page 93 Company Confidential NEM-4 CCS Technical Documentation RF Troubleshooting Mjoelner Can Test Points Figure 4: Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-89 Company Confidential...

  • Page 94: 26 Mhz Reference Oscillator (Vcxo)

    VCO is 240MHz/V. Even if PLL is not working (Vc out of range) there is a frequency at the output of the VCO, which is between 3 and 4 GHz (if the VCO itself is ok). Copyright  2003 Nokia Corporation. Page 6(b)-90 Issue 1 09/2003...

  • Page 95: Fault Finding Chart For Pll Synthesizer

    It is important to say that power supply for VCXO ( VR3) is only switched ‘OFF’ in the so- called ‘Deep Sleep Mode’ and power supply for VCO (G701 VR7) is switched ‘OFF’ in so- called ‘Sleep Mode’. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-91...

  • Page 96: Pll Block Diagram

    NEM-4 Company Confidential RF Troubleshooting CCS Technical Documentation PLL Block diagram Copyright  2003 Nokia Corporation. Page 6(b)-92 Issue 1 09/2003 Company Confidential...

  • Page 97: Pll Power Supply

    Company Confidential NEM-4 CCS Technical Documentation RF Troubleshooting PLL power supply Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-93 Company Confidential...
  • Page 98 NEM-4 Company Confidential RF Troubleshooting CCS Technical Documentation Loop Filter VCO and power supply Copyright  2003 Nokia Corporation. Page 6(b)-94 Issue 1 09/2003 Company Confidential...
  • Page 99 Company Confidential NEM-4 CCS Technical Documentation RF Troubleshooting 26MHz Bluetooth buffer Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-95 Company Confidential...

  • Page 100: Frequency Lists

    3836.8 902.0 947.0 3608.0 3788.0 122 914.4 959.4 3657.6 3837.6 902.2 947.2 3608.8 3788.8 123 914.6 959.6 3658.4 3838.4 902.4 947.4 3609.6 3789.6 124 914.8 959.8 3659.2 3839.2 Copyright  2003 Nokia Corporation. Page 6(b)-96 Issue 1 09/2003 Company Confidential...
  • Page 101 604 1728.6 1823.6 3457.2 3647.2 698 1747.4 1842.4 3494.8 3684.8 792 1766.2 1861.2 3532.4 3722.4 605 1728.8 1823.8 3457.6 3647.6 699 1747.6 1842.6 3495.2 3685.2 793 1766.4 1861.4 3532.8 3722.8 Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-97 Company Confidential...
  • Page 102 1906,0 1986,0 3812,0 3972,0 1868,6 1948,6 3737,2 3897,2 1887,4 1967,4 3774,8 3934,8 1906,2 1986,2 3812,4 3972,4 1868,8 1948,8 3737,6 3897,6 1887,6 1967,6 3775,2 3935,2 1906,4 1986,4 3812,8 3972,8 Copyright  2003 Nokia Corporation. Page 6(b)-98 Issue 1 09/2003 Company Confidential...

  • Page 103: Phoenix Tuning

    Calibration of GSM1800 and GSM1900 band only determines AGC values. The VCXO-calibration finds out a calibration value for VCXO control, an AFC initial value and 3 AFC-slope coefficients. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-99 Company Confidential...
  • Page 104 EGSM Set operating mode to local mode Select Tuning Alt-u RX Calibration Wait until the RX Calibration window pops up. Select Band GSM 900 Copyright  2003 Nokia Corporation. Page 6(b)-100 Issue 1 09/2003 Company Confidential...
  • Page 105 Connect an external signal generator to the RF connector of the phone and set the gen- erator as told in the window, taking care for external cable losses. Press ok and the window closes. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-101...
  • Page 106 RF Troubleshooting CCS Technical Documentation A typical result will look like this: Press Save and Continue. RX Calibration for EGSM is finished and the tuning continues automatically with GSM1800. Copyright  2003 Nokia Corporation. Page 6(b)-102 Issue 1 09/2003 Company Confidential...
  • Page 107 Set the generator as instructed and press OK. A typical result will look like this: Press Save and Continue. RX Calibration for GSM1800 is finished and the tuning contin- ues automatically with GSM 1900. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-103 Company Confidential...

  • Page 108: Rx Agc Limits

    The Rx calibration is only valid if it is within certain limits. For the most recent limits see NEM-4 Production Testing Requirements, If calibration is not within limits, there is a fault in the RX chain. Copyright  2003 Nokia Corporation. Page 6(b)-104 Issue 1 09/2003...
  • Page 109 Company Confidential NEM-4 CCS Technical Documentation RF Troubleshooting Below the values for RSSI4 and RSSI7 are given: RSSI4:(Rx A5) band EGSM900 GSM1800 GSM1900 RSSI7:(Rx A8) band EGSM900 GSM1800 GSM1900 Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-105 Company Confidential...
  • Page 110 NEM-4 Company Confidential RF Troubleshooting CCS Technical Documentation [This page intentionally left blank.] Copyright  2003 Nokia Corporation. Page 6(b)-106 Issue 1 09/2003 Company Confidential...

  • Page 111: Rx Band Filter Response Compensation

    Wait until the RF Controls window pops up Select Band GSM 900 Select Tuning Alt-u RX Band Filter Response Compensation Select Input Signal Level -60dBm. The setup should now look like this: Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-107 Company Confidential...
  • Page 112 Press OK and a new window pops up. Repeat this sequence 9 times until all channels have been tuned. Press Save and Continue. RX Band Filter Response Compensation for EGSM is finished and the tuning continues automatically with GSM1800. Copyright  2003 Nokia Corporation. Page 6(b)-108 Issue 1 09/2003 Company Confidential...
  • Page 113 GSM1900 and the following window should be seen: Set the generator as instructed and press OK. Repeat this sequence 9 times until all channels have been tuned. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-109 Company Confidential...
  • Page 114 Press OK. Press Save and Continue. RX Band Filter Response Compensation for EGSM is finished and the tuning continues automatically with GSM1800. Copyright  2003 Nokia Corporation. Page 6(b)-110 Issue 1 09/2003 Company Confidential...
  • Page 115 Set the generator to sweep the frequency list as instructed and press OK. Press Save and Continue. RX Band Filter Response Compensation for GSM1800 is fin- ished and the tuning continues automatically with GSM1900. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-111...
  • Page 116 3 bands. Set operating mode to local mode Select Tuning Alt-u RX Channel Select filter Calibration Check Save to Phone box. Copyright  2003 Nokia Corporation. Page 6(b)-112 Issue 1 09/2003 Company Confidential...
  • Page 117 CCS Technical Documentation RF Troubleshooting The setup should now look like this: Press Tune. Press Stop. Channel select filter calibration is finished and the tuning is fully completed. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-113 Company Confidential...

  • Page 118: Tx Power Tuning

    Wait until the TX Power Level Tuning window pops up. Press Start. TX Power Level Tuning procedure begins from EGSM900 and continues automatically to GSM1800 (PCS/PCN) and GSM1900 (PSCS). Copyright  2003 Nokia Corporation. Page 6(b)-114 Issue 1 09/2003 Company Confidential...
  • Page 119 Phoenix, since they are prod- uct specific. Table 2: GSM1800 Base Press Save and Continue in order to continue with the next band. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-115 Company Confidential...

  • Page 120: Tx I/Q Tuning

    Connect a Spectrum Analyzer or GSM tester with the option *Narrow Spectrum' to the RF connector of the phone. Select Tuning [Alt-U] TX IQ Tuning [I] Wait until the TX IQ Tuning window pops up. Press Start. Copyright  2003 Nokia Corporation. Page 6(b)-116 Issue 1 09/2003 Company Confidential...
  • Page 121 Reference level 35 dBm EGSM/EGSM900 Marker 1 897.33229 MHz Marker 2 897.4 MHz Marker 3 897.46771 MHz The following default values of the main toolbar should be used: Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-117 Company Confidential...
  • Page 122 (Marker 2 and 3). Use the variables 'TX I DC offset' and 'TX Q DC offset' to adjust the carrier signal to a minimum level (Marker 2). Copyright  2003 Nokia Corporation. Page 6(b)-118 Issue 1 09/2003 Company Confidential...
  • Page 123 2 must exceed 40dB. Tuning is possible by using arrow keys on the keyboard. Pushing the sliders by using the mouse is less sensitive but even possible. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-119 Company Confidential...
  • Page 124 1 and 3 must exceed 40dB. Tuning is possible by using arrow keys on the keyboard. Pushing the sliders by using the mouse is less sensitive but even possible. Copyright  2003 Nokia Corporation. Page 6(b)-120 Issue 1 09/2003...
  • Page 125 Press Save and Continue in order to continue with the next band. Note: The optimal values for I and Q Offset and Amplitude and Phase Difference vary from phone to phone. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-121...
  • Page 126 Band GSM 1800 Active Unit Operation Mode Burst RX/TX Channel TX PA Mode Free TX Data Type All1 Select TX Power Level 0 from the RF Controls window. Copyright  2003 Nokia Corporation. Page 6(b)-122 Issue 1 09/2003 Company Confidential...
  • Page 127 1 and 2 must exceed 40dB. Tuning is possible by using arrow keys on the keyboard. Pushing the sliders by using the mouse is less sensitive but possible. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-123...
  • Page 128 1 and 3 must exceed 40dB. Tuning is possible by using arrow keys on the keyboard. Pushing the sliders by using the mouse is less sensitive but even possible. Copyright  2003 Nokia Corporation. Page 6(b)-124 Issue 1 09/2003...
  • Page 129 Press Save and Continue in order to continue with the next band. Note: The optimal values for I and Q Offset and Amplitude and Phase Difference vary from phone to phone. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-125...
  • Page 130 Band GSM 1900 Active Unit Operation Mode Burst RX/TX Channel TX PA Mode Free TX Data Type All1 Select TX Power Level 0 from the RF Controls window. Copyright  2003 Nokia Corporation. Page 6(b)-126 Issue 1 09/2003 Company Confidential...
  • Page 131 2 must exceed 40dB. Tuning is possible by using arrow keys on the keyboard. Pushing the sliders by using the mouse is less sensitive but even possible. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-127 Company Confidential...
  • Page 132 1 and 3 must exceed 40dB, Tuning is possible by using arrow keys on the keyboard. Pushing the sliders by using the mouse is less sensitive but even possible. Copyright  2003 Nokia Corporation. Page 6(b)-128 Issue 1 09/2003...
  • Page 133 Press Save and Continue to finish the TX IQ tuning. Note! The optimal values for I and Q Offset, Amplitude and Phase Difference vary from phone to phone. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-129 Company Confidential...

  • Page 134: Bluetooth Troubleshooting

    If however you are able to get the phone to boot up and can reach Phoenix BB self tests it is possible to test the functionality of each component attached to Cbus. Use Copyright  2003 Nokia Corporation. Page 6(b)-130...
  • Page 135 UPP WD2 end it is 1.8V. MBUS traffic between UPP WD2 and UEM can be tested with PHOENIX (ST_MBUS_RX_TX_LOOP_TEST). Flashing is not possible if there is a problem in MBUS. Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-131...
  • Page 136 'Flashing' Troubleshooting Section Does the phone's main SW flash correctly? 1) Replace Does the BT BT MCM SW flash 2) Attempt to correctly? Flash Phone BT Flashing OK! Copyright  2003 Nokia Corporation. Page 6(b)-132 Issue 1 09/2003 Company Confidential...
  • Page 137 0.1%? Part III Re-Flash phone Re-solder using option BT MCM BT ONLY BT OK! Can you make Go to a connection to BT Failure BT Box? Part III Copyright  2003 Nokia Corporation. Issue 1 09/2003 Page 6(b)-133 Company Confidential...
  • Page 138 BT Box? using 'BT ONLY' Does VBBEN Check VEMRST / R436 UEMRST 1.4 - 4.0 VDC? 1) Replace BT MCM 2) Flash Phone Ýes BT OK! using 'BT ONLY' Copyright  2003 Nokia Corporation. Page 6(b)-134 Issue 1 09/2003 Company Confidential...

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