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Programmes After Market Services

NPE-4 Series Cellular Phones

Original ãNokia Corporation. Page 6-1

6 - Troubleshooting

Summary of content (78 pages)

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Programmes After Market Services NPE-4 Series Cellular Phones 6 - Troubleshooting Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Table of Contents Page No. Introduction ...................................................................................................................................... Baseband Troubleshooting ..................................................................................................... Phone is dead .....................................................................................................................
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Table of Contents Page No. Hagar ..................................................................................................................... EGSM Transmitter ............................................................................................................. General instructions for EGSM TX troubleshooting ......................................... Path of the transmitted EGSM signal ..................................................
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Table of Contents Page No. RX Channel Select Filter Calibration .................................................................... RX AM Suppression ................................................................................................... EGSM ..................................................................................................................... PCN .............................................................................
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PAMS Technical Documentation NPE-4 6 - Troubleshooting Introduction This section is a summary of experiences the NPE-4 R&D team made during the development. It covers some errors or wrong configurations and their symptoms as well as advice for problem solving. The section is seperated into two main parts the Baseband troubleshooting and the RF troubleshooting, however, it is advisable to read both parts.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Phone is dead Yes L260 towards SIM connector, VBAT = 3.6 VDC No Failure in VBAT line, check: X101, X102 No Check: L261,L262,L263, C261,C262,C265 No Check: S300, PWB No Check: B200,C209,C210, D200,PWB No Check: D200, PWB No Check: D200,C295,PWB No Check: C424,C425,L420, C420,R420,N600 (HAGAR) Yes L261 towards C261, L262 towards C262, L265 towards C265 voltage = 3.
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PAMS Technical Documentation NPE-4 6 - Troubleshooting Flash programming doesn’t work The flash programming can be done via the pads on the PWB or via system connector X100. In production, the first programming is done via the pads on the PWB. The main differences between these are: a) Flash programming voltage is produced different way. b) Signal routings are different. In case of Flash failure in FLALI station, problem is most likely related to SMD problems.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Flash programming Flash programming doesn't work If fault information from Prommer is: Phone doesn't set FBUS_TX line low Yes Check the connections: X100 p11 - R101 X100 p12 - R104 X100 p13 - R100 Connection ok? No Solder / replace faulty component Yes Try reading MCU ID with Phenix Reading ok? No Replace either UEM or UPP Yes Try reading Flash ID with Phenix reading ok? No Replace Flash Yes Flash again Power doesn’t stay on, or phone is
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Power doesn't stay on or phone is jammed Yes Sleep clock on J404 ~32.768 Hz, 1.8 Vpp No Check: B200,C209,C210, D200,PWB No Check: D200,PWB No Check: D400,D450,Z300, Keymat, Lightguide,PWB No Check: C424,C425,L420, C420,R420,N600 (HAGAR) Yes PURX = 1.8 VDC on V130 (Bluetooth module) pin44 ~1 sec.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation SIM I/O Control loop test. SIM Lock test. PMM (Flash) Validity test. PMM (Flash) Checksum test. If all these selftests are passed, the phone will start-up. From Phoenix it is possible to run all the selftest and the additional "Runtime test". The test cases can be seen below. Page 6-10 ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation The phone doesn’t register to the network or phone doesn’t make a call If the phone doesn't register to the network, the fault can be in either BB or RF. Due to the highly module design of the BB area, very few signals can be measured. Phone doesn't register to network or phone doesn't make a call Yes C292 towards D200 (UEM) ~4.75 VDC C294 towards R308 ~2.78 VDC C295 towards UEM ~2.78 VDC C296 towards V311 ~2.78 VDC C297 towards UEM ~2.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation The error ”SIM card rejected” means that the ATR message received from SIM card is corrupted, e.g. data signal levels are wrong. The first data is always ATR and it is sent from card to phone. SIM Fault Measure VSIM at X386. Is it 3V? No Check SIM reader X386 Measure VSIM at C302. Is it 3V? UEM FAILURE Yes Yes Check SIM power-up sequence No Replace R388 VSIM Reset Clock Data Page 6-12 ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Display Failure Display Fault Is display working No Change display module Yes Is display working No Yes Measure Vflash1 is 2,78V No Turn phone off and ohm measure between Vflash1 and ground. 0 ohm ~46k ohm Yes Check C239, C279, C304, C309, C350 R174, R202 and R352. OK UEM FAILURE Measure Vio is 1,8V No Turn phone off and ohm measure between Vio and ground. ~510k ohm Yes 0R Check C207, C218, C303, C404, C405, C450, C451 and R173.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Keypad Failure Power key failure Keypad fault Power Key OK? Yes No Voltage on S300 approx = Vbat No Check C312 and Z300 If Ok -> UEM fail Yes Voltage on S300 while pressed approx = Vbat No Phone jammed Yes S300 ok ? No Change S300 Yes Phone dead Keypad fault 2 Page 6-14 ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Volume key failure Keypad fault 2 Volume UP key OK? No Yes Check S301 with Ohmmeter S301 short? No Replace S301 If still fail Yes Replace Z300 If still fail-> UPP failure Volume DOWN key OK? Yes No Check S302 with Ohmmeter S302 short? No Replace S302 If still fail Yes Replace Z300 If still fail-> UPP failure Keypad fault 3 Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Keyboard failure Keypad fault 3 Keyboard OK? Yes END Page 6-16 No Replace light guide OK now? No Replace Z300 if still fail -> UPP failure Yes END ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Audio faults Earpiece doesn't work and there isn't any mechanical problem Microphone doesn't work and there isn't any mechanical problem Replace Microphone Replace Earpiece Ok Ok (bias) = 2.1V R150 towards UEM Ok Check L158, R171 (and C150 and R156 for Shortcircuit) No UEM FAILURE (D200) Yes R151 towards miclines (bias) = 1.01.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Headset earpiece doesn't work and there isn't any mechanical problem With headset connected, measure C177 and C178 towards UEM - DC level 0.8V. Press keypad tone 5 and measure with oscilloscope. An AC signal pressents. Not OK UEM FAILURE OK Measure C158 towards N150 with an oscilloscope. Same AC signal present (higher level). Not OK BOOMER FAILURE OK Measure R179 towards UPP - DC level > 1.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Charger failure Phone is off - battery is completely empty (~3.1 VDC) and no current is drawn from charger when connected Yes VCHAR > 2.1 VDC on L100 towards C107 No Check: F100, L100, V101, C107 No Check: F100, L100, V101, C107 No Check: X101, R202,R240,C240 No Check: X102,R202,R220, C220 No Check: R200, D200 No Check: D200, PWB Yes D200 UEM is faulty Phone is on or off - battery has norminal voltage 3.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Blue Tooth module faults None easy accessable Flashing fails V130 P52, P53, P54 VBAT = 3,6V No Failure in VBAT line check X101 and X102 Yes V130 P6, L133 P2 VREG = 2,7 - 2,86V No Faulty PWB or UEM Yes V130 P32, P49, P18 VAPPL = 1,7 - 3,3V No Faulty PWB or UEM Yes V130 P50 SYSCLK 0,5 - 0,8Vampl 26MHz (10ppm) No Faulty PWB or N600 Yes V130 P26 SLEEPCLK = 1,8V 32,768kHz (5%) No Faulty PWB or UEM Yes V130 P34 CBUS_Enx = 0V When bus i
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NPE-4 6 - Troubleshooting PAMS Technical Documentation No BT air connection Antenna open circuit No V130 bad soldering No Replace module V130 Yes Faulty PWB No BT audio connection J143 USARTTx = 1,8V Data No V130 bad soldering No Replace module V130 No V130 bad soldering No Replace module V130 Yes J144 USARTRx = 1,8V Data Yes Faulty PWB Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation RF Fail The problem is most likely RF related if the following conditions are fulfilled. · Module can be flashed and BER Test can be initiated. · BER is above limit or no connection to BT-Box Not OK Visual soldering inspection Re-solder OK Measure SYSCLK > 200 mVpp Reference: 11pF probe. Note: The measured result can depend very much on the probe type. Tip: If nessesary, measure a known good prototype with the same probe.
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PAMS Technical Documentation NPE-4 6 - Troubleshooting RF Troubleshooting Introduction 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 build around one ASICS Hagar (N600). For easier troubleshooting, this RF troubleshooting document is divided into sections.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation RF Key component placement Reference number Name Reference number Name N600 HAGAR RF IC X802 RF Connector N840 PA L836 Directional Coupler Z610 PCN RX SAW filter V830 Detector Diode Z620 EGSM RX SAW filter X101 Battery Terminal V+ Z650 EGSM TX SAW filter X102 Battery Terminal V- Z804 RX DUAL SAW filter G630 VCO Z802 RXTX Switch Module G740 VCTCXO T660 PCN TX Balun T630 VCO Balun V810 PCN RX LNA C840 Supply Capac
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NPE-4 6 - Troubleshooting PAMS Technical Documentation RF Measurement points PA Can Measurement points are shown on the picture below inside the circles. RF Connector VBD PA DUAL SAW DUAL SAW PA EGSM out PCN out PCN in EGSM PCN in VANT1 VANT2 LNAB_900 V820 RF out LNAC_900 V820 RF in DUAL SAW EGSM out DUAL SAW PCN out V810 RF in V810 RF out LNAB_ 1800 VTXB_900 Original TX_900 TX_1800 ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Hagar RF can Measurement points are shown circled on the picture below. TX_900 TXP VR2 TXC Z620 input TX_1800 Z610 input VR4 LNAC_1800 RXIINP RXQINP TXQOUT P/N VREFRF01 TXIOU P/N VCO out Bluetooth Clockbuffer output Page 6-26 VCTCXO supply ãNokia Corporation.
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PAMS Technical Documentation NPE-4 6 - Troubleshooting Abbreviations in fault finding charts BB Baseband DC Direct Current EGSM Extended GSM (See section 9.6.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation RF in general The RF part of this product is a Dualband Direct Conversion transceiver (Also used in 6210, 8210, 8850, 8310, and other). In Direct Conversion no intermediate frequencies are used for up- or downconversion. The VCO is set to either twice or four times (depending on the band used) the wanted RX or TX Frequency. The VCO frequency is divided by either 2 or 4 and fed to the mixers (down-conversion) or modulators (up-conversion).
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NPE-4 6 - Troubleshooting PAMS Technical Documentation EGSM Receiver General instructions for EGSM RX troubleshooting Connect the the phone to a PC with DAU-9P cable and dongle and follow the following instructions: Start Phoenix Service Software Select File Alt-F Scan Product Ctrl-R Wait until phone information shows in the lower right corner of the screen.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Apply a 942.467 MHz (channel 37 + 67.710kHz offset) -80 dBm signal to the RF-connector (remember to compensate for cable attenuation). Measuring with an oscilloscope on “RXIINP” or “RXQINP” this picture should be seen on a working EGSM receiver: Signal amplitude 950mV DC offset 1,1V Frequency 67kHz If this picture is not seen, then go to troubleshooting. Page 6-30 ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Fault finding chart for EGSM receiver Apply -80dBm 942.467MHz signal from generator to antenna connector EGSM RX Fault finding Tree Yes Oscilloscope at RXIINP Signal 950mVpp DC offset 1,1V Frequency 67,7kHz No Change generator level to -55dBm Yes Spectrumanalyzer Spectrumanalyzer DUAL SAW No V820, RFout (Z804) EGSM out -73dBm -85dBm Spectrumanalyzer DUAL SAW (Z804) EGSM in -84dBm No Yes Yes No Oscilloscope VR4 2.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation If no control voltage is present at VC1 or VC2 the RX/TX switch is open to the two RX outlets GSM_Rx and DCS_Rx. The RX/TX switch will work as a diplexer and EGSM signals pass to GSM_Rx and PCN signals to DCS_Rx. From GSM_Rx the EGSM signal is feed to the Dual RX SAW filter (Z804) via C804. Front-end The EGSM front-end consists mainly of two SAW filters (Z804 and Z620) and one LNA (V820) in-between.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Wait until the RF Controls window pops up Select Band GSM 1800 Active unit RX Operation mode Continuous RX/TX Channel 700 AGC 8 The setup should now look like this: Apply a 1842.867 MHz (channel 700 + 67.710kHz offset) -80 dBm signal to the RF-connector (remember to compensate for cable attenuation). Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Measuring with an oscilloscope on “Hagar RXI” or “Hagar RXQ” this picture should be seen on a working PCN receiver: Signal amplitude 1.5V DC offset 1,1V Frequency 67kHz If this picture is not seen, then go to section 6.2 of this document for troubleshooting. Fault finding chart for PCN receiver Apply -80dBm 1842.867MHz signal from generator to antenna connector PCN RX Fault finding Tree Yes Oscilloscope at RXIINP Signal 1.5Vpp DC offset 1.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation PCN Signal path For easy error tracing it is important to know the signal path of the PCN receiver. The components can be grouped into blocks and drawn as shown below. Note that the picture shows both EGSM recieiver (bottom) and PCN receiver (top). Tba RX/TX Switch From the antenna-pad (X800) the RF signal is lead to the RX/TX switch (Z802) via a mechanical switch, the antenna connector (X802).
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Hagar The balanced RX signal is mixed with a signal from the local oscillator at the same frequency as the wanted RX signal. After mixing the signal is converted to a single ended signal in the DtoS (Differential to Single ended) amplifier. The signal is now filtered in a BIQUAD filter to provide channel separation, amplified in the BB_Gain amplifier and DC compensated in DCN2.
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PAMS Technical Documentation NPE-4 6 - Troubleshooting The setup should now look like this: Now the measurement equipment should measure the following output signal from the phone. · Pout +23dBm @ 897.4MHz If this is not the case, then go to the fault finding chart for EGSM transmitter in this document for troubleshooting. Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Path of the transmitted EGSM signal For easy error tracing it is important to know the signal path of the EGSM transmitter. The components can be grouped into blocks and drawn as shown below. Note that the picture shows both EGSM transmitter (bottom) and PCN transmitter (top). HAGAR V_ANT_1/ V_ANT_2 2 VBD RF Controls VTXLO_G VTX_B_G VTX_B_P Dir.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Fault finding chart for EGSM transmitter Oscilloscope R726 VREFRF01 Vdc = 1.5 Volt C656 VR2 Vdc = 2.7 Volt C760 TXP Vdc > 2.5 Volt C601 VR4 Vdc = 2.7 Volt Check No BaseBand Yes Oscilloscope R764 TXIOUTP 67kHz Vac = 0.4 Vpp, Vdc = 0.8 V R764 TXIOUTN 67kHz Vac = 0.4 Vpp, Vdc = 0.8 V R766 TXQOUTP 67kHz Vac = 0.4 Vpp, Vdc = 0.8 V R766 TXQOUTN 67kHz Vac = 0.4 Vpp, Vdc = 0.8 V VTXB_900 Vdc > 2.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation PCN Transmitter General instructions for PCN TX troubleshooting Apply a RF-cable to the RF-connector to allow the transmitted signal to act as normal. RF-cable should be connected to measurement equipment (GSM Test equipment, Powermeter, Spectrum Analyzer, or similar) or to at least a 10-dB attenuator, otherwise the PA may be damaged.
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PAMS Technical Documentation NPE-4 6 - Troubleshooting The setup should now look like this: Now the measurement equipment should measure the following output signal from the phone. · Pout +20dBm @ 1747.8MHz If this is not the case, then go to the fault finding chart for PCN transmitter in this document for troubleshooting. Path of the transmitted PCN signal For easy error tracing it is important to know the signal path of the PCN transmitter.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation HAGAR V_ANT_1/ V_ANT_2 2 VBD RF Controls VTXLO_G VTX_B_G VTX_B_P Dir.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Fault finding chart for PCN transmitter Oscilloscope R726 VREFRF01 Vdc = 1.5 Volt C656 VR2 Vdc = 2.7 Volt C760 TXP Vdc > 2.5 Volt C601 VR4 Vdc = 2.7 Volt C602 VR3 Vdc = 2.7 Volt Check No BaseBand No Check Yes Oscilloscope R764 TXIOUTP 67kHz Vac = 0.4 Vpp, Vdc = 0.8 V R764 TXIOUTN 67kHz Vac = 0.4 Vpp, Vdc = 0.8 V R766 TXQOUTP 67kHz Vac = 0.4 Vpp, Vdc = 0.8 V R766 TXQOUTN 67kHz Vac = 0.4 Vpp, Vdc = 0.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation (EGSM and PCN). VCO frequency is divided by 2 or by 4 in HAGAR depending on which band is active. General instructions for Synthesiser troubleshooting Connect the the phone to a PC with DAU-9P cable and dongle and follow the following instructions: Start Phoenix Service Software Select File Alt-F Ctrl-R Scan Product Wait until phone information shows in the lower right corner of the screen.
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PAMS Technical Documentation NPE-4 6 - Troubleshooting The setup should now look like this: Now it is possible to measure frequency of 3769.6MHz at the output of the VCO (G630) using a resistive probe and a spectrum analyzer. If this is not the case, then go to fault finding chart for PLL synthesiser in this document for troubleshooting. 26 MHz reference oscillator ( VCTCXO ) The 26 MHz oscillator (G740) has three functions. = Reference frequency for the PLL synthesiser.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation VCO The VCO is able to generate frequencies in the range of 3420 – 3840 MHz when PLL is in function. The frequency of the VCO signal is divided by 2 or by 4 in HAGAR so it is possible to generate the frequency of all channels in EGSM and PCN (both RX and TX). Frequency of the VCO is controlled by DC voltage (Vc) coming from the loop filter. Range of the Vc when PLL is in function is 0.7 – 3.8 V.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation PLL Blockdiagram 2 2 2 1/4 2 VCP INP_LO/INM_LO 1/2 2 2 2 NDIV ADIV 64/65 2 j OUT_CP loop filter charge pump VCO VR7 VCP/GND_CP 2 VDIG 4 4 1/2 OSC_IN RDIV 4 4 VR3 AFC 26MHz 1/2 1/4 TOUT 2dB AFC LPRFCLK_I RFCLK_I VBB VF_RX VR4 VPRE VLO CTRL SLE SCLK SDATA Reset Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Frequency lists EGSM Fre que ncy list NPE-3 EGSM CH T X RX VCO T X VCO RX CH T X RX VCO T X 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 3743.2 979 881 926 3524 3704 5 891 936 3564 3744 980 881.2 926.2 3524.8 3704.8 6 891.2 936.2 3564.8 3744.8 981 881.4 926.4 3525.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation PCN CH 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 TX 1710.2 1710.4 1710.6 1710.8 1711 1711.2 1711.4 1711.6 1711.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation SMD Guidelines for PA Since the PA is a LGA package removal and attachment must be done in a way specified below. Removal instuctions • ESD Protection Follow RFMD’s ESD Work Instructions when handling microcircuit devices. • Before removal, the modules to be removed MUST BE BAKED in a calibrated oven/ chamber for 24 hours at 125ºC to remove moisture from the package.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Attachment instructions • ESD Protection Follow RFMD’s ESD Work Instructions when handling microcircuit devices. • Before attachment can begin, the modules to be attached MUST BE BAKED in a calibrated oven/chamber for 24 hours at 125ºC to remove moisture from the package. • Set up the PC board to be attached so that it is directly over the blower section of the Hako 853 heater. The PC board should be 0.5 inches above the Hako 853.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Phoenix tuning Before any tuning the phone should syncronised with the PC. Connect the the phone to a PC with DAU-9P cable and dongle and follow the following instructions: Start Phoenix Service Software Select File Scan Product Alt-F Ctrl-R Wait until phone information shows in the lower right corner of the screen. RF tuning after repairs Different repairs require different tuning.
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PAMS Technical Documentation NPE-4 6 - Troubleshooting The setup should now look like this: Select Automatic, press Start and a new window pops up: Select default, press OK and the window closes. Now it is possible to press the calibrate button in the RX Calibration window. Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Press Calibrate and a window pops up: Connect an external signal generator to the RF connector of the phone and set the generator as told in the window. Press ok and the window closes. Press Stop in the RX Calibration window and a new window pops up: Press Yes and the EGSM RX Calibration is finished.
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PAMS Technical Documentation NPE-4 6 - Troubleshooting The setup should now look like this: Select Automatic, press Start and a new window pops up: Select default, press OK and the window closes. Now it is possible to press the calibrate button in the RX Calibration window. Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Press Calibrate and a window pops up: Connect an external signal generator to the RF connector of the phone and set the generator as told in the window. Press ok and the window closes. Press Stop in the RX Calibration window and a new window pops up: Press Yes and the PCN RX Calibration is finished.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation A window pops up: Select Yes and the RX Band Filter Response Compensation window pops up. The setup should now look like this: Select Original Input Signal Level -80 ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Press Manual tuning and a window pops up: Connect an external signal generator to the RF connector of the phone and set the generator as told in the window. Press OK and a new window pops up: Set the generator as told in the window. Press OK and a new window pops up. Repeat this sequense 9 times until all channels are done.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Wait until the RF Controls window pops up Select Band GSM 1800 Select Maintenance Tuning Alt-M T RX Band Filter Response CompensationB A window pops up: Select Yes and the RX Band Filter Response Compensation window pops up. The setup should now look like this: Select Original Input Signal Level -80 ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Press Manual tuning and a window pops up: Connect an external signal generator to the RF connector of the phone and set the generator as told in the window. Press OK and a new window pops up: Set the generator as told in the window. Press OK and a new window pops up. Repeat this sequense 9 times until all channels are done.
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PAMS Technical Documentation NPE-4 6 - Troubleshooting A window pops up: Select Yes and the RX Channel Select Filter Calibration window pops up. The setup should now look like this: Press Autotune and the optimal values are found. Press Stop and a new window pops up: Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Press Yes and the RX Channel Select Filter Calibration is finished. RX AM Suppression This calibration is tuning the AM suppression performance of Hagar mixers and will have to be done in both bands. If flash or Hagar have been replaced or Full Factory settings have been performed RX AM Suppression must be done.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Select Default, press OK and the setup should now look like this: Connect an external signal generator to the RF connector of the phone and set the generator as told in the window. Select Tuning mode Automatic Press Tune and the optimal values are found. Press Stop and a window pops up: Press Yes and the EGSM RX AM Suppression tuning is finished. PCN Set operating mode to local mode Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Select Maintenance Alt-M Tuning T RX AM Suppression S Wait until the RX AM Suppression window pops up Select Band GSM 1800 Press Start and a window pops up: Select Default, press OK and the setup should now look like this: Connect an external signal generator to the RF connector of the phone and set the generator as told in the window. Page 6-64 ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Select Tuning mode Automatic Press Tune and the optimal values are found. Press Stop and a window pops up: Press Yes and the PCN RX AM Suppression tuning is finished. TX Power tuning This tuning must be done in both bands. Note: TX Power tuning must be done with a peak power meter, e.g. Rohde & Schwarz model NRVD with a Rohde & Schwarz Peak Power Sensor TDMA Model NRV-Z31 and a suitable attenuator.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Press Start and a window pops up: Select Permanent memory, press OK and the window closes. Select TX Data Type Random The setup should now look like this: Select TX PA Mode High Adjust DAC Values for Power Level 5, 15 and 19 according to Target values. Press calculate, check if all levels match the target values, correct if necessary. Select Page 6-66 TX PA Mode Low ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Adjust DAC Values for Power Level 7, 15 and 19 according to Target values. Press calculate, check if all levels match the target values, correct if necessary. Press Stop and a window pops up: Select 'Save values to Phone Permanent Memory' Press Yes and the EGSM TX Power Level Tuning is finished. PCN Set operating mode to local mode Select Maintenance Alt-M Tuning T TX Power Level Tuning L Wait until the TX Power Level Tuning window pops up.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation The setup should now look like this: Select TX PA Mode High Adjust DAC Values for Power Level 0, 11 and 15 according to Target values. Press calculate, check if all levels match the target values, correct if necessary. Press Stop and a window pops up: Select 'Save values to Phone Permanent Memory' Press Yes and the EGSM TX Power Level Tuning is finished. Page 6-68 ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation TX I/Q Tuning This tuning must be done in both bands. EGSM Set operating mode to local mode Select Maintenance Alt-M Tuning T TX IQ Tuning I Wait until the TX IQ Tuning window pops up. Connect a Spectrum Analyzer or GSM tester with the option *Narrow Spectrum' to the RF connector of the phone. If a spectrum analyzer is used then use the following settings. EGSM Center Frequency 897.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation TX PA Mode Free The setup should now look like this: Page 6-70 ãNokia Corporation.
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PAMS Technical Documentation NPE-4 6 - Troubleshooting The Spectrum Analyzer now shows a plot like this: The purpose of this tuning is to tune the carrier signal and the +67kHz signal to a minimum level (Marker 2 and 3). Use the varables 'TX I DC offset' and 'TX Q DC offset' to adjust the carrier signal to a minimum level (Marker 2). Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation The Spectrum Analyzer now shows a plot like this: Use the varables 'Amplitude difference' and 'Phase difference' to adjust the +67kHz signal to a minimum level (Marker 3). Page 6-72 ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation The Spectrum Analyzer now shows a plot like this: Select 'Save to Product' Press Stop and the values are stored in the phone. The EGSM TX IQ Tuning is now finished. Note: The optimal values for "TX I and Q Offset" and "Amplitude and Phase Difference" vary from phone to phone. PCN Set operating mode to local mode Select Maintenance Alt-M Tuning T TX IQ Tuning Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation Wait until the TX IQ Tuning window pops up. Connect a Spectrum Analyzer or GSM tester with the option *Narrow Spectrum' to the RF connector of the phone. If a spectrum analyzer is used then use the following settings. PCN Center Frequency 1747.8MHz Frequency Span 300 kHz Resolution Bandwidth 3 kHz Video Bandwidth 3 kHz Sweep Time 3 sek. Sweep Type Clear/Write Detector Type Max Peak Reference level 35 dBm Marker 1 1747.
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PAMS Technical Documentation NPE-4 6 - Troubleshooting The setup should now look like this: Original ãNokia Corporation.
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NPE-4 6 - Troubleshooting PAMS Technical Documentation The Spectrum Analyzer now shows a plot like this: The purpose of this tuning is to tune the carrier signal and the +67kHz signal to a minimum level (Marker 2 and 3). Use the varables 'TX I DC offset' and 'TX Q DC offset' to adjust the carrier signal to a minimum level (Marker 2). Page 6-76 ãNokia Corporation.
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PAMS Technical Documentation NPE-4 6 - Troubleshooting The Spectrum Analyzer now shows a plot like this: Use the varables 'Amplitude difference' and 'Phase difference' to adjust the +67kHz signal to a minimum level (Marker 3). Original ãNokia Corporation.
PAGE 78
NPE-4 6 - Troubleshooting PAMS Technical Documentation The Spectrum Analyzer now shows a plot like this: Select 'Save to Product' Press Stop and the values are stored in the phone. The PCN TX IQ Tuning is now finished. Note: The optimal values for "TX I and Q Offset" and "Amplitude and Phase Difference" vary from phone to phone. Page 6-78 ãNokia Corporation.