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Nokia NHM-8NX Series Troubleshooting Instructions

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PAMS Technical Documentation
NHM-8NX Series Transceivers
Troubleshooting Instructions
Issue 1 05/02
ãNokia Corporation

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  • Page 1 PAMS Technical Documentation NHM-8NX Series Transceivers Troubleshooting Instructions Issue 1 05/02 ãNokia Corporation...

  • Page 2: Table Of Contents

    RX calibration ......................47 RX channel select filter .....................49 RX Band Filter Response ..................50 Tx Power tuning ......................51 TX power tuning GSM.................... 52 TX power tuning PCN..................... 55 I/Q tuning ........................57 RF control ........................59 ãNokia Corporation Page 2 Issue 1 05/02...
  • Page 3 Fig 20 VCXO 26 MHz waveform ..................40 Fig 21 PLL fault finding chart .....................41 Fig 22 Measurement point for VCXO supply ..............42 Fig 23 Measurement point for VCXO output ..............43 Fig 24 Measurement point for PLL ..................43 ãNokia Corporation Issue 1 05/02 Page 3...

  • Page 4: Transceiver Troubleshooting

    15 V supply voltage. • Set the phone module to test jig (MJS-37) and start Phoenix service software. Initialize connection to phone (use FBUS driver when using DAU-9S and COM- BOX driver when using FPS-8). ãNokia Corporation Page 4 Issue 1 05/02...

  • Page 5: Baseband Troubleshooting

    In this section, fault finding charts are provided for the most common NHM-8NX errors. NOTE : Since both D200 (UEM) and D400(UPP) is underfilled, they can not be replaced. If either D200 or D400 is defective, the whole PWB has to be dis- ãNokia Corporation Issue 1 05/02 Page 5...
  • Page 6 NHM-8NX Troubleshooting Instructions PAMS Technical Documentation carded. ãNokia Corporation Page 6 Issue 1 05/02...

  • Page 7: Phone Is Dead

    Check : C227 C227, PWB. VR3 = 2,78VDC Else defective D200* J425 Check : 26 MHz clock min. C227, PWB. 300mVACpp, Else defective D200* probe Cin=10-13 pF/10M Check : D450 (Flash). Else defective D200* ãNokia Corporation Issue 1 05/02 Page 7...

  • Page 8: Flash Programming Does Not Work

    Voltage level at 1,8VDC Else defective D200* Try reading MCU ID Check : with Phoenix. PWB. Else defictive D400* Reading OK? Try reading Flash ID Check : with Phoenix. Replace D450 Reading OK? Reflash phone ãNokia Corporation Page 8 Issue 1 05/02...

  • Page 9: Power Does Not Stay On Or Phone Is Jammed

    Check : UI functionality, D450, Keymat, and keys react Lightguide, PWB. to pressure? Else defective D400* J425 Check : 26 MHz clock min. C425, C426, R425, 300mVACpp, R426, N600(Mjoelner) probe Cin=10-13 pF/10M Reflash phone ãNokia Corporation Issue 1 05/02 Page 9...

  • Page 10: Display Information: "Contact Service

    Key is stucked A-cover, Keymat, Lightguide, PWB. Check : Flash checksum Reflash phone PWB. Else defective D450 (FLASH) Ÿ ASIC version vs. compilation flag, PMM checksum Ÿ PMM validity Ÿ Warrenty Information State Ÿ SIM-Lock ãNokia Corporation Page 10 Issue 1 05/02...

  • Page 11: Phone Does Not Register Onto The Network, Or The Phone Cannot Make A Call

    D400* RXQP/N (R603) = 0-1,45VDC R610, R611 Check : Check analog signals during R610, R611,PWB. GSM-frame (TX slot): Else defective D200* TXIP/N (R610) = 1-1,75VDC or D400* TXQP/N (R611) = 1-1,75VDC Check RF ãNokia Corporation Issue 1 05/02 Page 11...

  • Page 12: Sim Related Faults

    1,8V-SIM, and then 3V-SIM X387, R386, PWB. during power-up. Else defective D200* (See illustration below) SIM Interface OK Check for SIM voltage during power-up Ch1 : VSIM Ch3 : CLOCK Ch2 : RESET Ch4 : DATA ãNokia Corporation Page 12 Issue 1 05/02...

  • Page 13: Sim-Card Rejected

    SIM data pin. SIM Interface OK For reference a picture with normal SIM power-up is shown below. Normal SIM power-up sequence Ch1 : VSIM Ch3 : CLOCK Ch2 : RESET Ch4 : DATA ãNokia Corporation Issue 1 05/02 Page 13...

  • Page 14: Audio Related Faults

    R165, C168, PWB. R165 towards UEM (bias) Else defctive D200* = 2,1V R153 Check : Check voltage level on R153, R157,C151, C152, R153 towards mic-lines (bias) C153, C154, PWB. = 1,0V - 1,4V ãNokia Corporation Page 14 Issue 1 05/02...
  • Page 15 UEM (bias) R166, R151, C171 = 1,0V - 1,4V R152, R165, R168, C155, C156, C172, Replace : C170, C173, C174, Defective component Z101 Check XMIC line to UEM (D200) Error still present Defective D200* ãNokia Corporation Issue 1 05/02 Page 15...

  • Page 16: Charging Failure

    Phone is ON or OFF - battery nominal voltage (~3,6VDC) and no current from charger when connected Check : L100 F100, L100, V101, C100, VCHAR > 3,6VDC R200, System-connector. Defective D200 or D400* ãNokia Corporation Page 16 Issue 1 05/02...
  • Page 17 Voltage on R200 towards R200, PWB. D200 same as VBAT voltage Else defective D200* R200 Check : Voltage rises slowly on PWB. R200 towards D200 when Else defective D200* charger is connected. Check : ãNokia Corporation Issue 1 05/02 Page 17...

  • Page 18: Rf Troubleshooting

    VANT2 and VANT1 the switch works as a diplexer and the GSM900 sig- nal is passed through the RX/TX switch to GSM-RX and the GSM1800 signal is passed to DCS-RX. ãNokia Corporation Page 18 Issue 1 05/02...
  • Page 19 L704 for GSM1800) and used in the power loop amplifier in Mjoelner to establish the right output power. The TX signal from the couplers is feed to the RX/TX switch, used to select which signal to route to the antenna. ãNokia Corporation Issue 1 05/02 Page 19...
  • Page 20 2 block will together divide the frequency by a ratio based on the selected channel. The divider output is supplied to the phase detector which compares the fre- quency and phase to the 400kHz reference clock. Based on this comparison the phase ãNokia Corporation Page 20 Issue 1 05/02...
  • Page 21 BIST / Temp. Circuit level GENIO6 Control shift Resistor Ext/R2H/R2 RFBUSX RF_EN RF_CLK RFBUSDA RF_DATA RFBUSCLK Ref. 2,7k filter PA vendor indication 18k : Hitachi 82k : RFMD RFCONV_0(9) RF Key component placement ãNokia Corporation Issue 1 05/02 Page 21...
  • Page 22 All power supplies for the RF Unit are generated in the UEM IC (D200). All power outputs from this IC has a decoupling capacitor at which the supply voltage can be checked. The power supply configuration used in the HDb12 phone is shown in the blockdiagram below: ãNokia Corporation Page 22 Issue 1 05/02...
  • Page 23 4.75 VPLL 2.64 2.78 2.86 2.64 2.78 2.86 VVCO 2.64 2.78 2.86 1.72 1.88 VREF2 VrefRF01 1.334 1.35 1.366 VBATT BATTERY Please see the picture below for measuring points at the UEM (D200). ãNokia Corporation Issue 1 05/02 Page 23...

  • Page 24: Receiver

    Connect the phone to a PC with the module repair jig. Start Phoenix and establish connection to the phone Select File. Select Scan for Product Ctrl-R Select Maintenance, Testing and then RF Controls ãNokia Corporation Page 24 Issue 1 05/02...
  • Page 25 NHM-8NX PAMS Technical Documentation Troubleshooting Instructions Select: Band: GSM900 Active Unit: Operation Mode: Continuous Rx/Tx Channel: AGC: The setup should now look like this: ãNokia Corporation Issue 1 05/02 Page 25...

  • Page 26: Fault Finding Chart For Gsm900 Receiver

    Mjoelner serial interface By measuring with an oscilloscope at RXIP or RXQP on a working GSM 900 receiver this picture should be seen. Signal amplitude peak-peak 588 mV DC offset 1.33 V ãNokia Corporation Page 26 Issue 1 05/02...

  • Page 27: General Instructions For Gsm1800 Rx Troubleshooting

    Connect the phone to a PC with the module repair jig. Start Phoenix and establish connection to the phone Select File. Select Scan for Product Ctrl-R Select Maintenance, Testing and RF Controls Select: Band: GSM1800 Active Unit: Operation Mode: Continuous Rx/Tx Channel: AGC: ãNokia Corporation Issue 1 05/02 Page 27...
  • Page 28 NHM-8NX Troubleshooting Instructions PAMS Technical Documentation The setup should now look like this: ãNokia Corporation Page 28 Issue 1 05/02...

  • Page 29: Fault Finding Chart For Gsm1800 Receiver

    Mjoelner serial interface By measuring with an oscilloscope at RXIP or RXQP on a working GSM 900 receiver this picture should be seen. Signal amplitude peak-peak 588 mV DC offset 1.33 V ãNokia Corporation Issue 1 05/02 Page 29...
  • Page 30 NHM-8NX Troubleshooting Instructions PAMS Technical Documentation Figure 11: RX1800 I/Q signal waveform ãNokia Corporation Page 30 Issue 1 05/02...

  • Page 31: Measurement Points In The Receiver

    Mjoelner input INPM Mjoelner input INML L603 L611 L601 L602 RX1800 RX900 SAW filter bal output SAW filter bal output Z601 Z602 RX1800 RX900 SAW filter unbal input SAW filter unbal input Z601 Z602 ãNokia Corporation Issue 1 05/02 Page 31...

  • Page 32: Transmitter

    Measurement points for the transmitter Figure 15: TX measuremnet points in the PA ( N700 ) shielding can Vcon2_DCS Vcon1_GSM Pout_DCS Pin_DCS VPCTRL_P DCS-Tx VTX_B_P DET_Out GSM-Tx (C717) VPCTRL_G Pout_GSM Pin_GSM VTX_B_G (C717) ãNokia Corporation Page 32 Issue 1 05/02...

  • Page 33: General Instructions For Gsm Tx Troubleshooting

    Start Phoenix-Service-Software and establish a connection to the phone e.g. FBUS. Select File and Product: Gemini Select: Maintenance, Testing and RF Controls Band: GSM 900 Active Unit: Tx Power Level: Tx Data Type: Random ãNokia Corporation Issue 1 05/02 Page 33...

  • Page 34: Fault Finding Chart For Gsm900 Transmitter

    Fault finding in output power For the spectrum analyser measurements in the following chart use the 500 ohm passive probe. Since the signal measured is bursted it is advised to set the analyser to maxhold. ãNokia Corporation Page 34 Issue 1 05/02...
  • Page 35 NHM-8NX PAMS Technical Documentation Troubleshooting Instructions Figure 16: EGSM900 transmitter fault finding chart ãNokia Corporation Issue 1 05/02 Page 35...
  • Page 36 Blue trace: TXIP - All 1 Pink trace: TXQP Blu etrace: TXIP - Random Pink trace: TXQP Blu etrace: TXIP - Random ( Zoo Pink trace: TXQP Blue trace: TXIP - All 1 Zoom In) ãNokia Corporation Page 36 Issue 1 05/02...

  • Page 37: Pcn Transmittergeneral Instructions For Pcn Tx Troubleshooting

    Measure the output power of the phone; it should be around 28.5 dBm. Remember the loss in the jig; around 0.7 dB. Path of the transmitted PCN signal Fault finding chart for PCN transmitter ãNokia Corporation Issue 1 05/02 Page 37...
  • Page 38 NHM-8NX Troubleshooting Instructions PAMS Technical Documentation Figure 18: GSM1800 transmitter fault finding chart ãNokia Corporation Page 38 Issue 1 05/02...

  • Page 39: Synthesizer

    The 26 MHz oscillator is located in the Mjoelner IC (N600). The coarse frequency for this oscillator is set by an external crystal (B600). The reference oscillator is used as a refer- ence frequency for the PLL synthesizer and as the system clock for BaseBand. The ãNokia Corporation Issue 1 05/02 Page 39...
  • Page 40 700mVpp. Frequency of this oscillator is adjusted by changing the AFC-register inside the Mjoelner IC. This is done via the Mjoelner serial interface. Example Signal Measured at VCXO output (R425) Figure 20: VCXO 26 MHz waveform ãNokia Corporation Page 40 Issue 1 05/02...

  • Page 41: Vco

    Some signal between 3 and 4 GHz Oscilloscope: Check Measure Loopfilter R618,R619, Control Voltage C641 C639-C641 between 0.5 and 4.0 V Check Mjoelner N600, UPP D400, RFBusClk J608, RFBusDA J610, RFBusX j609 & Reset_Mjoel ãNokia Corporation Issue 1 05/02 Page 41...

  • Page 42: Measurement Points For The Pll

    If this is not the case check the reference crystal (B600) and Mjolner (N600) as well as R425, R426, C425, C426. Measurement points for the PLL Measurement points at the VCXO Figure 22: Measurement point for VCXO supply VCXO Vcc (C620) ãNokia Corporation Page 42 Issue 1 05/02...
  • Page 43 Figure 23: Measurement point for VCXO output VCXO Output (R425) Measure at this end! Measurement points at the PLL/VCO Figure 24: Measurement point for PLL VCO Vcc (R656) VCO Output is also detected here! ãNokia Corporation Issue 1 05/02 Page 43...
  • Page 44 NHM-8NX Troubleshooting Instructions PAMS Technical Documentation CP Vcp (C616) Vcp=VR1A PLL Vcc (C614, C634) ãNokia Corporation Page 44 Issue 1 05/02...

  • Page 45: Frequency Lists

    946.8 3607.2 3787.2 121 914.2 959.2 3656.8 3836.8 3608 3788 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 ãNokia Corporation Issue 1 05/02 Page 45...
  • Page 46 3684.4 1766 1861 3532 3722 1784.8 1879.8 3569.6 3759.6 1728.6 1823.6 3457.2 3647.2 1747.4 1842.4 3494.8 3684.8 1766.2 1861.2 3532.4 3722.4 1728.8 1823.8 3457.6 3647.6 1747.6 1842.6 3495.2 3685.2 1766.4 1861.4 3532.8 3722.8 ãNokia Corporation Page 46 Issue 1 05/02...

  • Page 47: Alignment

    + and – steps the value for every press. Repeat function seems not to work. In I/Q you can use the side arrows. RX calibration Select Maintenance, Tuning, RX Calibration Select Band: GSM 900 The result should be like the shown: ãNokia Corporation Issue 1 05/02 Page 47...
  • Page 48 NHM-8NX Troubleshooting Instructions PAMS Technical Documentation 1 Select Automatic, set to 60dBm in small window in top bar 2 Start and select PM settings in the start parameters that pops up 3 OK ãNokia Corporation Page 48 Issue 1 05/02...

  • Page 49: Rx Channel Select Filter

    3 Stop, and the little window pops up where you can select to save or not RX channel select filter 1 Select Maintenance, Tuning, Rx Channel Select Filter Calibration 2 Press Start and you can select to load values from the phone or not 3 Press AutoTune ãNokia Corporation Issue 1 05/02 Page 49...

  • Page 50: Rx Band Filter Response

    3 Press Manual Tuning 4 Set the Signal generator according to the pop-up windows 5 When finished press Stop, Write to PM area and you can select to save values to the phone or not ãNokia Corporation Page 50 Issue 1 05/02...

  • Page 51: Tx Power Tuning

    Auto Tuning (Dwell should be around 10ms). Tx Power tuning Select Maintenance, Tuning, Tx Power Level Tuning ãNokia Corporation Issue 1 05/02 Page 51...

  • Page 52: Tx Power Tuning Gsm

    2 Press Start and select from where to load values. Best is to have PC saved data from a good phone. The data from a "good" phone can be saved to PC, for use ãNokia Corporation Page 52 Issue 1 05/02...
  • Page 53 2 Select Tx PA Mode High 3 Tune the highlighted values to the wanted power (Use average burst power) 4 Tune base level to –28dBm (Close to lowest level CMD55 can keep synchronisa- tion) ãNokia Corporation Issue 1 05/02 Page 53...
  • Page 54 You can also save the table to the PC, so that you can load it to an other phone. Or you can select not to do anything by removing both ticks. Only way to end the tuning session is with Yes ãNokia Corporation Page 54 Issue 1 05/02...

  • Page 55: Tx Power Tuning Pcn

    NHM-8NX PAMS Technical Documentation Troubleshooting Instructions TX power tuning PCN 1 GSM 1800 band (PCN) 2 Start 3 Select where to get values from. Normally Permanent Memory ãNokia Corporation Issue 1 05/02 Page 55...
  • Page 56 2 Only high mode is possible 3 Tune the highlighted values to the wanted power 4 Tune base level to –27dBm 5 Stop 6 Select where to save the values, one, both or no one can be selected. ãNokia Corporation Page 56 Issue 1 05/02...

  • Page 57: I/Q Tuning

    1 Select where to get values. Normally select Load From Product 2 Start 3 Tune offset values to lowest carrier. Use Side arrows or +, - . 4 Tune Amplitude and phase to lowest sideband. ãNokia Corporation Issue 1 05/02 Page 57...
  • Page 58 PAMS Technical Documentation 5 Check eventually with other modulation (0). Remember to tick Save to Product if you want to save to phone. 1 Stop to end the tuning with the selected save option ãNokia Corporation Page 58 Issue 1 05/02...

  • Page 59: Rf Control

    If you want to tune at other channels than the default, then you must select it first in RF control and then start the tuning. ãNokia Corporation Issue 1 05/02 Page 59...

  • Page 60: Call Testing

    When the phone has made a registration a call can be made, and it is possible to let the phone answer via Phoenix. In the Autocaller (Maintenance Testing) you can answer by ticking Answer when button pushed and then posh the button. ãNokia Corporation Page 60 Issue 1 05/02...
  • Page 61 NHM-8NX PAMS Technical Documentation Troubleshooting Instructions This page left intentionally blank. ãNokia Corporation Issue 1 05/02 Page 61...
  • Page 62 NHM-8NX Troubleshooting Instructions PAMS Technical Documentation ãNokia Corporation Page 62 Issue 1 05/02...

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