Nokia NHM-7 Series Troubleshooting Manual
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Nokia NHM-7 Series Troubleshooting Manual

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  • Page 1 3$06 7HFKQLFDO 'RFXPHQWDWLRQ 1+0 6HULHV 7UDQVFHLYHUV 7URXEOHVKRRWLQJ DQG 7XQLQJ ,QVWUXFWLRQV 1RNLD &RUSRUDWLRQ ,VVXH  ...
  • Page 2 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation [This page left intentionally blank] 1RNLD &RUSRUDWLRQ 3DJH  ,VVXH  ...

  • Page 3: Table Of Contents

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Table of Contents Page No Baseband Troubleshooting Instructions................. 5 PWB Test Points ......................5 Measurement Points .....................6 Troubleshooting steps ....................6 Main troubleshooting tree 1 ..................7 Main troubleshooting tree 2 ..................8 Phone dead ........................9 Flash programming fault ....................10 Flash programming fault 2 ..................11 Phone jammed 1 .......................12...
  • Page 4 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation RX Band Filter Response Compensation ..............56 RX AM Suppression ....................62 Transmitter Tuning ...................... 65 TX I/Q Tuning ......................65 TX Power Level Tuning ....................70 Service Tool Concept For Baseband Tunings.............. 74 Baseband Tuning......................75 Energy Management Tuning ..................75 1RNLD &RUSRUDWLRQ 3DJH ...

  • Page 5: Baseband Troubleshooting Instructions

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions 7URXEOHVKRRWLQJ ,QVWUXFWLRQV %DVHEDQG 7URXEOHVKRRWLQJ 3:% 7HVW 3RLQWV MBUSTX MBUSRX SLEEPCLK FBUSRX FBUSTX CBUSDA DBUSCLK DBUSDA UEMINT CBUSCLK PURX MBUS VPP DBUSENX1 CBUSENX SLEEPX FMCLK FBUSTX FMTUNEX EXTRDX FBUSRX FMCTRLDA FMCTRLCLK FMWREN FPS–8 FM RADIO FPS-8 test points are connected to the lines from FPS–8 and have 2.7 V logic level.

  • Page 6: Measurement Points

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Measurement Points VR5 2.78 V VR7 2.78 V VR3 2.78 V VOUT VFLASH2 2.78 V VDD 2.78 V VR1B 4.75 V VDDI 1.8 V VR1A 4.75 V SCLK VR2 2.78 V VR6 2.78 V VR4 2.78 V XRES VANA 2.78 V...

  • Page 7: Main Troubleshooting Tree 1

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Main troubleshooting tree 1 Phone totally Phone is dead dead Flash programming Flash doesn’t work faults Phone doesn’t Phone is start up or the phone is jammed jammed Charging Charger doesn’t work TOP 2 1RNLD &RUSRUDWLRQ ,VVXH  ...

  • Page 8: Main Troubleshooting Tree 2

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Main troubleshooting tree 2 TOP 2 Phone doesn’t read SIM card SIM card Audio Audio faults faults Display Display or LED’s faults doesn’t work Keypad Keypad doesn’t work faults 1RNLD &RUSRUDWLRQ 3DJH  ,VVXH  ...

  • Page 9: Phone Dead

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Phone dead Phone is dead Check X101 Phone current solder and is zero ? VBATT lines Is phone Phone is Phone current is < 50mA flash programing OK ? jammed Flash faults Phone current is ~ 54 mA Check BSI line Is phone in LOCAL...

  • Page 10: Flash Programming Fault

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Flash programming fault Flash faults Check BSI line The Phone does Measure BSI pulse X101, C241, not set Flashbus TXD line during Flash R203, C109, high after the startup. programming. R202 Is it OK ? Measure FBUSTX Check R102 line during Flash...

  • Page 11: Flash Programming Fault 2

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Flash programming fault 2 Flash faults page 2 Change Wrong manufactor ID FLASH and Device ID Phone is Is the phone totally dead ? dead Phone doesn’t start up Phone is or the phone jammed is jammed ? Retest...

  • Page 12: Phone Jammed 1

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Phone jammed 1 Phone is jammed Check Z260 – Z265 Check VBATT1–6 C260 – C265 VIO, VCORE, BSI / BTEMP FLASH1, VANA, lines and Measure VR3 lines. Are VBATT lines VIO, VCORE, FLASH1, they OK? VANA, VR3 voltages.

  • Page 13: Phone Jammed 2

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Phone jammed 2 Jammed Page 2 Measure watchdog Phone shutdown after signal CBUSDA from Change UPP testpoint J414 Is it OK ? Measure DBUSClk 1MHz signal from testpoint J413 Is it OK ? Measure FBUSRX Read phone info.

  • Page 14: Sim Card Fault (Insert Sim Card)

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation SIM card fault (insert SIM card) SIM card Check BSI line X101, C241, Insert SIM card R203, C109, Set phone LOCAL mode R202. faults Is it OK ? If OK –> Change UEM Check X386 Check VSIM line,X386, C203, C389.

  • Page 15: Audio Fault 1

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Audio fault 1 Audio faults Try change earpiece. Is earpiece working? Retest Is it working now ? Set phone in LOCAL mode. Use Phoenix Audio Test. Set EXT IN, HP OUT, LOOP ON. Measure DC Check L151, C160, offset voltage...

  • Page 16: Audio Fault 1B, Earpiece

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Audio fault 1B, earpiece Earpiece Connect EXT audio signal 1kHz (sine) (¨200mVp–p) in XMICP pads and Ground in XMICN Measure sine signal Measure sine signal from UEM (R156) Change UEM. from earpiece pads. Is it ~130mVp–p ? Is it ~880mVp–p ? Check R156, C153,...

  • Page 17: Audio Fault 2

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Audio fault 2 Audio faults 2 Try change bottom Is microphone working? connector X100. Retest Is it working now ? Set phone in LOCAL mode. Use Phoenix Audio Test. Set HP IN, EXT OUT, LOOP ON. Check L105, C105, C152, Measure MICB1...

  • Page 18: Audio Fault 3

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Audio fault 3 Audio faults 3 Measure VBATT Check VBATT voltage from B301. Is BUZZER working? line Is it OK? Set phone in LOCAL mode. Use Phoenix Audio Test. Set Buzzer volume ON. Measure Buzzer Change control signal...

  • Page 19: Display Fault 1

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Display fault 1 Display faults Set phone into local mode. Start Display test with Phenix Try change UI module Retest Is it working now ? Are the UI–module led’s turned on ? Check X303 Measure signal from X303 pin.

  • Page 20: Display Fault 2

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Display fault 2 Display faults 2 Are the display led’s turned on ? Measure signal fromV301 pin. 3. Check LED‘s Is it 128 Hz and line ~3.3Vp–p ? Check R307 Measure VBATT and VBATT from V301 pin.

  • Page 21: Display Fault 3

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Display fault 3 Display faults 3 Try change UI module Retest Is it working now ? Does the display start ? Check X300 Measure Check C303 VDD (2.78V) and and lines. VDDI (1.8V). If OK, Is it OK? Change UEM...

  • Page 22: Keypad Fault 1

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Keypad fault 1 Keypad faults Check R301, Measure voltage C312, S300 Is the power key working ? from S300 and line. Is it HIGH ? If OK –> Change UEM Measure voltage from S300 when Phone is Chech S300.

  • Page 23: Keypad Fault 2

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Keypad fault 2 Keypad faults 2 Try change UI module. Retest Is it working now ? Is UI module keys working ? Check X303 Check ROW0 – Measure ROW0, 4 Lines, X303. ROW1, ROW2, ROW3, If OK change ROW4 lines from X303.

  • Page 24: Keypad Fault 3

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Keypad fault 3 Keypad faults 3 Check S301, S302, lines. Measure ROW0 If OK change Is volume UP key working ? line from S301. Z301. Is it ~1.8 V ? If still FAIL change UPP Check S301 Measure COL1...

  • Page 25: Rf Troubleshooting

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions RF Troubleshooting Introduction to RF Troubleshooting Measurements should be done using spectrum analyzer with high–frequency high–impedance passive probe (LO–/reference frequencies and RF power lev- els) and oscilloscope with a 10:1 probe (DC–voltages and low frequency sig- nals).

  • Page 26: Rf Key Components

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation RF Key Components EGSM LNA EGSM TX SAW EGSM RX SAW DCS LNA Hagar RFIC DCS TX balun Dual RX SAW DCS RX SAW VCO balun 26MHz XO Dual coupler 4GHz VCO Antenna switch Antenna pad FM receiver IC...

  • Page 27: Pwb Test Points

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions PWB Test Points 900 1st SAW out 1800 LNA out 1800 1st SAW out LNA_P LNAB_G 900_RX LNAB_P 900 LNA out VrefRf02 900 antsw tx contr VrefRf01 RX_I LNA_G RX_Q 26M xo out 1800 antsw contr VR4 VR6 1800_RX...

  • Page 28: Transmitter

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Transmitter General instructions on Troubleshooting Connect test jig to computer with DAU9S cable or to FPS–8 Flash Prommer with XCS–4 modular cable. Make sure that you have PKD–1 dongle connected to computers parallel port. Connect DC power supply to module test jig with FLC–2 cable.
  • Page 29 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions – Set power level to 5 (Default = 19) on GSM900 or to 0 (Default = 15) on GSM1800 1RNLD &RUSRUDWLRQ ,VVXH   3DJH ...

  • Page 30: Transmitter Troubleshooting Diagram

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Transmitter troubleshooting diagram 1RNLD &RUSRUDWLRQ 3DJH  ,VVXH  ...

  • Page 31: Transmitter Troubleshooting 2 - Hagar

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Transmitter troubleshooting 2 - Hagar 1RNLD &RUSRUDWLRQ ,VVXH   3DJH ...
  • Page 32 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Transmitter troubleshooting 3 - PA & Antenna 1RNLD &RUSRUDWLRQ 3DJH  ,VVXH  ...
  • Page 33 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Transmitter signals X_I_0, Tx on, Random data, Burst mode TX_Q_0, Tx on, Random data, Burst mode 900/1800 antsw tx contr, Tx on, Burst mode 0/1800 PA bias, Tx on, Burst mode 900/1800 PA ctrl, Tx on, Burst mode, High power level 1RNLD &RUSRUDWLRQ ,VVXH  ...
  • Page 34 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation G S MP O W Tu e Se p 2 5 1 3 : 4 8 : 5 9 2 0 0 1 R E F 4 1 . 0 d B m A T T A_ wr i t e B_ b l a n k 1 0 d B /...

  • Page 35: Receiver

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Receiver Connect test jig to computer with DAU-9S cable or to FPS-8 Flash Prom mer with XCS-4 modular cable. Make sure that you have PKD-1 dongle connected to computer’s parallel port. Connect DC power supply to module test jig with FLC-2 cable. Set the DC supply voltage to 3.9V and set the jumper connector on test jig to "bypass"...
  • Page 36 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Measuring with an oscilloscope on "RX_I" or "RX_Q" this picture should be seen on a working GSM900 or GSM1800 receiver: Signal amplitude is 700 mVpp, DC offset 1.35 V and Signal amplitude is 700 mVpp, DC offset 1.35 V and frequency 67 kHz. If this signal is not seen, continue to the next page.

  • Page 37: Receiver Troubleshooting Diagram For Gsm900

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Receiver troubleshooting diagram for GSM900 Receiver troubleshooting diagram for GSM900 Apply –90dBm 942.46771MHz signal from generator to anten- na connector Oscilloscope at RX_I Change ge- Spectrumanalyzer Spectrumanalyzer Spectrumanalyzer Check An- Signal 700mVpp 900 LNA out 900 1st SAW out 900_RX...

  • Page 38: Receiver Troubleshooting Diagram For Gsm1800

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Receiver troubleshooting diagram for GSM1800 Receiver troubleshooting diagram for GSM1800 Apply –90dBm 1842.86771MHz signal from generator to anten- na connector Oscilloscope at RX_I Change ge- Spectrumanalyzer Spectrumanalyzer Spectrumanalyzer Check An- Signal 700mVpp 1800 LNA out 1800 1st SAW out 1800_RX...

  • Page 39: Llna Gainstep Checking

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions lLNA gainstep checking  /1$ RXW  /1$ RXW  5)OHYHO DW DQWHQQD SRUW HJ  G%P  5)OHYHO DW DQWHQQD SRUW HJ  G%P  5; FRQWLQXRXV PRGH ORFDO PRGH  5; FRQWLQXRXV PRGH ORFDO PRGH  GLIIHUHQFH EHWZHHQ $*&...

  • Page 40: Synthesizer

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Synthesizer General instructions for Synthesizer troubleshooting Connect test jig to computer with DAU–9S cable or to FPS–8 Flash Prommer- with XCS–4 modular cable. Make sure that you have PKD–1 dongle connected to computers parallelport. Connect DC power supply or FPS–8 to module test jig with FLC–2 cable.

  • Page 41: Synthesizer Troubleshooting Diagram

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Synthesizer troubleshooting diagram 1RNLD &RUSRUDWLRQ ,VVXH   3DJH ...

  • Page 42: Synthesizer Signals

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Synthesizer signals Synthesizer signals 26MHz XO out 13MHz clock 4GHz VCO ctrl 4GHz VCO ctrl 900 RX, channel 124, continuous mode 1800 TX, channel 512, continuous mode 1RNLD &RUSRUDWLRQ 3DJH  ,VVXH  ...
  • Page 43 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Fr i Ma y 1 1 1 3 : 0 3 : 2 6 2 0 0 1 R E F – 2 0 . 0 d B m A T T A_ v i e w B_ b l a n k 1 0 d B / MA R K E R...

  • Page 44: Fm Radio Troubleshooting

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation FM Radio Troubleshooting FM Radio troubleshooting FM Radio component layout Components L101, C101 and C102 are not shown in picture. Componentsare placed in baseband section. 1RNLD &RUSRUDWLRQ 3DJH  ,VVXH  ...

  • Page 45: Fm Radio Troubleshooting Diagram

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions FM Radio troubleshooting diagram Note 1. RF test signal parameters: – Amplitude, A, –67.0 dBm – Carrier ferquency, f , 98,000 MHz – Deviation, ∆ f , 75 kHz – Modulating frequency f , 1,000 kHz (RF generator internal) Note 2.

  • Page 46: Fm Radio Sígnals

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation FM Radio sígnals Audio out from PWB test point – with FM Audio out from test jig connector – with FM test signal. test signal, volume 100%. G S MP O W Fr i Au g 3 1 0 7 : 4 0 : 2 1 2 0 0 1 G S MP O W...

  • Page 47: Quick Guide For Tuning The Nhm-7* Phone With Phoenix

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Quick Guide for Tuning the NHM-7* Phone With Phoenix General information RF tuning should be made in the same order as shown in this document. If baseband tuning are needed, they should be made before the RF tunings Avoid unnecessary tuning –...

  • Page 48: Service Tool Concept For Rf Tunings

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Service Tool Concept for RF Tunings All RF tunings must be carried out in MJS-46 Module Jig CPL-4 coupler can only be used for testing, NOT for tuning! Power to MJS-46 should be supplied from an external DC power supply, not FPS-8 prommer Maximum input voltage is 12 VDC, nominal input for RF tunings is +8V DC Remember cable attenuation when setting required RF levels.

  • Page 49: Receiver Tuning

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Receiver tuning RX Channel Select Filter Calibration Extra equipment / external RF signal is not needed. Must be done before other RX calibrations. This function is used to calibrate RX channel select filter in GSM Phones. Rx Channel select filter is tuned only in one band = Single calibration for both bands.
  • Page 50 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation • Press "AutoTune" to start the tuning. • Tuning values should be 0…31 • Select “Stop” • If values shown are within limits, choose “Yes” to save values to the phone save them to phone. •...

  • Page 51: Rx Calibration

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions RX Calibration RF generator needed. This tuning performs RX Calibration Must be done separately on both bands! • Start RX Calibration at EGSM (GSM900), then do RX Calibration at GSM1800 band. • AFC tuning is done while EGSM (GSM900) band RX Calibration is performed.
  • Page 52 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation • Press "Start" • Select “Default” to start tuning from factory default values => OK • Press "Calibrate" • Set RF generator to required frequency => OK 1RNLD &RUSRUDWLRQ 3DJH  ,VVXH  ...
  • Page 53 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions • Tuning values and ADC readings will be shown Typical values and limits in (GSM900) RX Calibration: /LPLWV (*60 *60 7\SLFDO YDOXH $)& YDOXH ž $)& VORSH ž 566,  ž 566,  ž 566,...
  • Page 54 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation • Continue tuning from GSM1800. Choose the correct band from the drop-down menu. • Press "Start" to continue just like in the EGSM900 Band above. • When asked, set RF generator to required frequency => OK 1RNLD &RUSRUDWLRQ 3DJH  ,VVXH  ...
  • Page 55 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Typical values and limits in (GSM1800) RX Calibration: *60 7\SLFDO YDOXH /LPLWV 566,  ž 566,  ž 566,  ž 566,  ž 566,  ž 566,  ž 566,  ž 566, ...

  • Page 56: Rx Band Filter Response Compensation

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation RX Band Filter Response Compensation RF generator needed. Must be done separately on both bands! Start RX Calibration at EGSM (GSM900), then do RX Calibration at GSM1800 band. NOTE! Remember to do RX calibration before doing Rx Band Filter Response Compensation! Remember to take jig and cable attenuations into account! •...
  • Page 57 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions • Select "Manual tuning" • You will be asked to supply 9 different RF frequencies to the phone • Set first required frequency and level => OK 1RNLD &RUSRUDWLRQ ,VVXH   3DJH ...
  • Page 58 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation • Set 2nd required frequency and level => OK • Set 3rd required frequency and level => OK • Set 4th required frequency and level => OK • Set 5th required frequency and level => OK 1RNLD &RUSRUDWLRQ 3DJH  ,VVXH  ...
  • Page 59 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions • Set 6th required frequency and level => OK • Set 7th required frequency and level => OK • Set 8th required frequency and level => OK • Set 9th required frequency and level => OK 1RNLD &RUSRUDWLRQ ,VVXH   3DJH ...
  • Page 60 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Typical values and limits in Rx Band Filter Response Compensation EGSM900: 0HDVXUHG OHYHO &KDQQHO ,QSXW IUHTXHQF\ 0+] /LPLWV G% GLIIHUHQFH G%   ž   ž   ž    ž ...
  • Page 61 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Typical values and limits in Rx Band Filter Response Compensation GSM1800: 0HDVXUHG OHYHO GLIIHUHQFH /LPLWV G% &KDQQHO ,QSXW IUHTXHQF\ 0+] G%   ž   ž   ž   ž  ...

  • Page 62: Rx Am Suppression

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation RX AM Suppression RF generator needed (AM modulation). Must be done separately on both bands! Start RX Calibration at EGSM (GSM900), then do RX Calibration at GSM1800 band. • This dialog performs RX AM Suppression. •...
  • Page 63 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions • Set RF generator to state described in left side window. • Press the “Tune” button to perform actual tuning. • The new tuning values and RSSI dBm value are updated. • One "I"...
  • Page 64 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation • If values shown are within limits, Select “Stop” • Choose “Yes” to save values to the phone ² Continue tuning from GSM1800. Choose the correct band from the drop-down menu. • Repeat the same steps as for the EGSM900 band •...

  • Page 65: Transmitter Tuning

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Transmitter Tuning TX I/Q Tuning Spectrum analyzer needed. Tx IQ Tuning allows changing the Tx I DC Offset, Tx Q DC Offset, Amplitude difference and Phase difference. Must be done separately on both bands! Start TX I/Q Tuning at EGSM (GSM900), then continue at GSM1800 band.
  • Page 66 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation • The tuning is done by setting each of the sliders to desired value. The sliders can be changed only when the tuning is ongoing. • The order of tuning should be same as the order of the sliders e.g. the Tx I DC Offset is tuned first and Phase difference is tuned last.
  • Page 67 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions • Tune wrong sideband to minimum using Amplitude/Phase difference controls (f0+68kHz on spectrum analyzer screen) G S MP O W Th u Au g 3 0 1 1 : 4 3 : 4 5 2 0 0 1 R E F 3 2 .
  • Page 68 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation • If values shown are within limits, check the "Save to product" tick box and choose “Stop” save the new values to the product • Continue tuning from GSM1800. Choose the correct band from the drop- down menu.
  • Page 69 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Typical TX IQ Tuning Values and tuning limits GSM1800: , '& 2IIVHW ž ž 4 '& 2IIVHW ž ž $PSOLWXGH GLIIHUHQFH ž ž 3KDVH GLIIHUHQFH ƒžƒ ƒžƒ • If values shown are within limits, check the "Save to product" tick box and choose “Stop”...

  • Page 70: Tx Power Level Tuning

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation TX Power Level Tuning Power Meter (or Spectrum analyzer) needed With Tx Power Level Tuning, the coefficients are adjusted for each power level Must be done separately on both bands! Start Power Level tuning at EGSM (GSM900), then continue at GSM1800 band.
  • Page 71 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions • Note that TX PA mode is “High” at this point. Figure 1: • The coefficient table lists the power level, coefficient, target dBm and DAC value for each power level. • The tuned power level can be chosen by using up and down arrows or mouse.
  • Page 72 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation • Change TXPA mode to “low“from the drop down menu. When the PA mode is changed, the previous values are saved in memory and the ones for new mode are shown . •...
  • Page 73 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions • Continue tuning from GSM1800. Choose the correct band from the drop-down menu. • Repeat the same steps as for the EGSM900 band above • Note that In GSM1800 band PA mode can not be changed because tuning is only made in “High”...

  • Page 74: Service Tool Concept For Baseband Tunings

    NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation Service Tool Concept For Baseband Tunings EM calibrations must be carried out in JBV-1 Docking Station. CPL-4 coupler can only be used for testing, NOT for tuning! Power to JBV-1 should be supplied from an external DC power supply, not FPS-8 prommer.

  • Page 75: Baseband Tuning

    NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions Baseband Tuning Energy Management Tuning External power supply needed. EM Calibration is used for calibrating Battery and Charger settings of the phone. Preparation for EM Calibration: - Connect DC Cable SCB-3 between JBV-1 and Vin of Phone for Charger calibra- tion.
  • Page 76 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation • Select “Calibrate” to run selected calibrations Limits for Energy Management Calibration: If values shown are within limits select “Save To Phone” to save values to 3DUDPHWHU 0LQ $'& JDLQ   '&...
  • Page 77 NHM-7 PAMS Technical Documentation Troubleshooting and Tuning Instructions [This page left intentionally blank] 1RNLD &RUSRUDWLRQ ,VVXH   3DJH ...
  • Page 78 NHM-7 Troubleshooting and Tuning Instructions PAMS Technical Documentation 1RNLD &RUSRUDWLRQ 3DJH  ,VVXH  ...

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