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Nokia RM-4 Troubleshooting Instructions

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Customer Care Solutions
Technical Documentation
Troubleshooting Instructions
ISSUE 1 02/2004
COMPANY CONFIDENTIAL
1
Copyright © 2003 Nokia. All Rights Reserved.

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Summary of Contents for Nokia RM-4

  • Page 1 Customer Care Solutions Technical Documentation Troubleshooting Instructions ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.
  • Page 2 RM-4/RM-5 CCS Technical Documentation Troubleshooting Instructions [This page left intentionally blank] COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 3: Table Of Contents

    Manual Alignment using Phoenix ................41 RX calibration ......................41 GSM1800 RX calibration ..................42 RX channel select filter ..................... 43 RX Band Filter Response..................44 Tx Power tuning ......................45 ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.
  • Page 4 TX power tuning PCN .................... 48 I/Q tuning ........................50 RF control ......................... 52 Call testing ........................ 53 General instructions for RM-4/5 FM radio Troubleshooting ........54 Location of testpoints ....................54 Phoenix control ......................54 Fault finding guide ....................56...

  • Page 5: Baseband Troubleshooting

    CCS Technical Documentation Baseband troubleshooting Baseband testpads Component side (PWB backside) Figure 1: Component side (PWB backside) Display connector (PWB front side) Figure 2: Display connector (PWB front side) ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 6: Close Up Of Testpads

    RM-4/RM-5 CCS Technical Documentation Troubleshooting Instructions Close up of testpads Production test pads for programming FLASH and service functions (J396) RFBUS RF I/Q signals COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.
  • Page 7 RM-4/RM-5 Troubleshooting Instructions CCS Technical Documentation CBUS / DBUS / FBUS / MBUS / SLEEPX / PURX / AUDIO FLASH SHUTDOWN ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 8: Fault Finding Charts

    VR3 = 2,78VDC Else defective D200* Check : R426 26 MHz clock min. 300mVACpp, C227, PWB. probe Cin=10-13 pF/10M Else defective D200* Check : D450 (Flash). Else defective D200* COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 9: Flash Programming Does Not Work

    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 ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 10: Power Doesn't Stay On Or Phone Is Jammed

    Lightguide, PWB. to pressure? Else defective D400* R426 Check : 26 MHz clock min. C420, C426, R420, 300mVACpp, R426, N600(Mjoelner) probe Cin=10-13 pF/10M Reflash phone COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 11: Display Information: "Contact Service

    A-cover, Keymat, Lightguide, PWB. Check : Flash checksum Reflash phone PWB. Else defective D450 (FLASH) ASIC version vs. compilation flag, PMM checksum PMM validity Warrenty Information State SIM-Lock ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 12: No Network Or No Call

    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 COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 13: Sim Related Faults

    (See illustration below) present or only working intermittently . Please check BSI. SIM Interface OK Check for SIM voltage during power-up Ch1: VSIM Ch3: CLOCK Ch2: RESET Ch4: DATA ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 14: 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 COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 15: Audio Related Faults

    Earpiece do not work Replace : Earpiece Error still present Z150, R161 Replace : Check Z150, R161 is Z150 / R161 working correctly (no short/open-circuit) Defective D200* (or PWB error) ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 16: Microphone Does Not Work

    Else defctive D200* = 2,1V R153 Check : Check voltage level on R152, R153, R155, R157, R153 towards mic-lines (bias) R164, C151, C152, C153, = 1,0V - 1,4V C154, PWB. COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 17: Headset Microphone Does Not Work

    Headset earpiece does not work Headset earpiece do not work. R183, Z102, C123, Replace : C124 R183 and/or Z102, C123, Check that components are C124 working correctly Defective D200* ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 18: No Sound From Ihf Or Headset

    Distorted IHF OK badly scratched. Reliable sound? repair might be impossible. Sound in IHF? Go to "Headset earpiece do not work". Go to "Handsfree speaker do not work". COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 19: Handsfree Speaker Does Not Work

    D400. (make sure IHF Check output on N180 is activated in software!). (at C184 / C185) Fig.2 Check/Replace : Output looks C184, C185, C189, C190 (change N180) ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 20: Charging Faults

    D200 same as VBAT voltage Else defective D200*v R200 Check : Voltage rises slowly on PWB. R200 towards D200 when Else defective D200* charger is connected. Check : COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.
  • Page 21 Phone is ON or OFF - battery nominal voltage (~3,7VDC) and no current from charger when connected Check : L100 F100, L100, V100, C100, VCHAR > 3,7VDC R200, System-connector. Defective D200 or D400* ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.
  • Page 22 RM-4/RM-5 CCS Technical Documentation Troubleshooting Instructions [This page left intentionally blank] COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 23: General Rf Troubleshooting

    PWB. Ca- pacitors can be checked for short-circuiting and resistors for value by means of an ohmmeter, but be aware in-circuit measurements should be evaluated carefully. ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 24: Rf Key Component Placement

    PCN RX SAW Z602 EGSM RX SAW Z603 EGSM TX SAW B600 26 MHz crystal G600 VCO (4.0 GHz UHF VCO ) N700 Power Amplifier (PA) Z700 RX/TX switch COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.
  • Page 25 CCS Technical Documentation Refer to the picture below for measuring points at the UEM (D200). Figure 4: Supply points at UEM (D200) Figure 5: Supply point at Mjoelner (N600) ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 26: General Instructions For Gsm900 Rx Troubleshooting

    RF Controls .Band GSM 900 RX .Continuous mode Channel 37 .AGC 8 FEG ON + 46 dB The setup should now look like this: Figure 6: GSM900 RF Controls window COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 27: Troubleshooting Chart For Gsm900 Receiver

    SAW filter output Z602 -65dBm Spectrum analyzer Check check signal after Inductor inductors L603, L602 L602 and L603 -65DbM Oscilloscope VRX 2.7V Check Check Mjoelner Baseband serial interface ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.
  • Page 28 By measuring with an oscilloscope at RXIP or RXQP on a working GSM 900 receiver this pic- ture should be seen. Signal amplitude peak-peak 789 mV DC offset 1.2 V Figure 8: RX900 I/Q signal waveform COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 29: General Instructions For Gsm1800 Rx Troubleshooting

    RF Controls .Band GSM 1800 RX .Continuous mode Channel 700 .AGC 8 FEG ON + 46 dB The setup should now look like this: Figure 9: GSM1800 RF control window ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 30: Troubleshooting Chart For Gsm1800Receiver

    SAW filter output Z602 -65dBm Spectrum analyzer Check check signal after Inductor inductors L603, L602 L601 and L611 -65DbM Oscilloscope VRX 2.7V Check Check Mjoelner Baseband serial interface COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 31: Measurement Points In The Receiver

    Signal amplitude peak-peak 460 mV DC offset 1.2 V Figure 11: RX1800 I/Q signal waveform Measurement points in the receiver Figure 12: RX measurements point at the RX/TX Switch - Z700 ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.
  • Page 32 RM-4/RM-5 CCS Technical Documentation Troubleshooting Instructions Figure 13: Measurements points at the RX-Filters – Z601/Z602 Figure 14: RX I/Q Signals, Baseband shielding can UEM (D200) COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 33: Rm-4/Rm-5 Transmitter Troubleshooting

    RM-4/RM-5 Transmitter troubleshooting Measurement points for the transmitter Figure 15: TX measurement points in the PA (N700) shielding can Figure 16: TX measurement points in Mjolner (N600) shielding can ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 34: General Instructions For Rm4/Rm-5 Gsm Tx Troubleshooting

    Figure 17: GSM900 RF controls window Measure the output power of the phone; it should be around 32.5 dBm. Remember the loss in the jig; around 0.3 dB. COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.
  • Page 35 RM-4/RM-5 Troubleshooting Instructions CCS Technical Documentation Figure 18: VPCTRL_G and TXC signal ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 36: Pcn Transmitter General Instructions For Pcn Tx Troubleshooting

    Your screen should look like: Figure 19: RF controls window Measure the output power of the phone; it should be around 28.5 dBm. Remember the loss in the jig; around 0.7 dB. COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 37: Synthesizer

    In order to reduce the requirements of the tuning voltage and coverage of the VCO, the VCO core is composed of four VCOs in parallel. This VCO circuit enables a very wide tuning range of 3.4 - 4.0 GHz . ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 38: Troubleshooting Diagram For Pll Synthesizer

    RM-4/RM-5 CCS Technical Documentation Troubleshooting Instructions Troubleshooting diagram for PLL Synthesizer Figure 21: PLL Troubleshooting diagram COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 39: Phone Fails After Power On

    If this is not the case check the reference crystal (B600) and Mjolner (N600) as well as R420, R426, C420, C426. Measurement points at the VCXO Figure 22: Measurement point for VCXO supply Figure 23: Measurement point for VCXO output ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 40: Measurement Points At The Pll/Vco

    RM-4/RM-5 CCS Technical Documentation Troubleshooting Instructions Measurement points at the PLL/VCO Figure 22: Measurement point for PLL COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 41: Manual Alignment Using Phoenix

    Select Maintenance , Tuning, RX Calibration Select Band: GSM 900 Select Automatic and follow the prompts The result should be like the shown: Figure 23: RX calibration window ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 42: Gsm1800 Rx Calibration

    1 The existing data in the phone is shown 2 Calibrate, and the new data is shown 3 Stop, and the little window pops up where you can select to save or not COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 43: Rx Channel Select Filter

    4 Press Stop and you can select to save values to the phone or not to.. Figure 25: RX channel selection window Note: This calibration requires no input signal ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 44: Rx Band Filter Response

    Note: This calibration requires a lot of different frequencies from the generator. If you have a signal generator with a frequency list option you can with advantage use Auto Tuning (Dwell should be around 10ms). COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 45: Tx Power Tuning

    2 Press Start and select from where to load values. It is best to have PC saved data from a good phone. The data from a "good" phone can be saved to PC for use later. ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.
  • Page 46 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) 5 Calculate coefficients COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.
  • Page 47 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 ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 48: Tx Power Tuning Pcn

    Figure 32: Start TX power level tuning dialogue 1 Select GSM 1800 band (PCN) 2 Start 3 Select where to get values from. Normally Permanent Memory 4 OK COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.
  • Page 49 Figure 34: Stop TX power level tuning dialogue 6 Select where to save the values, one, both or no one can be selected. 7 Yes. That’s the only way to end tuning. ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 50: I/Q Tuning

    3 Tune offset values to lowest carrier. Use Side arrows or +, - . 4 Tune Amplitude and phase to lowest sideband. 5 Check eventually with other modulation (0). COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.
  • Page 51 1 Stop to end the tuning with the selected save option 2 Same procedure for PCN as for GSM. 3 Remember to tick Save To Product. 4 Stop. Ends tuning and does what you have ticked. ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 52: 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. Figure 37: RF control window COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

  • Page 53: 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. ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 54: General Instructions For Rm-4/5 Fm Radio Troubleshooting

    RM-4/RM-5 CCS Technical Documentation Troubleshooting Instructions General instructions for RM-4/5 FM radio Troubleshooting Location of testpoints R362/N360 R385 R362 C372 C367 R360 C360 R385 Phoenix control Connect the phone to a PC with the module repair jig. Start Phoenix and establish connection with the phone.
  • Page 55 The setup should look like this: It is now possible to tune the radio for the wanted frequency. The troubleshooting guide requires that the radio is turned on. ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.

  • Page 56: Fault Finding Guide

    Replace R360 2.7<Vdc<2.9 Osciloscope Osciloscope at R362/N360 at R362 13 MHz signal 13 MHz signal Replace D400 amplitude amplitude 1.3Vpp 1.8Vpp Set radio for 87.5 Check R362 Replace N360 COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.
  • Page 57 Set radio for 88 MHz@50 kHz Radio OK Replace N360 deviation level : -60 dBm at C360 Apply signal from generator, 88 MHz@50 kHz deviation level : -60 dBm at C360 ISSUE 1 02/2004 COMPANY CONFIDENTIAL Copyright © 2003 Nokia. All Rights Reserved.
  • Page 58 RM-4/RM-5 CCS Technical Documentation Troubleshooting Instructions [This page left intentionally blank] COMPANY CONFIDENTIAL ISSUE 1 02/2004 Copyright © 2003 Nokia. All Rights Reserved.

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