Nokia NHM-7 series Troubleshooting Manual Download

Page: 66 / 78

NHM-7

Troubleshooting and Tuning Instructions

PAMS Technical Documentation

3DJH



1RNLD&RUSRUDWLRQ

,VVXH

•

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.

•

Use <=, =>, PgUp or PgDn keys

•

Set spectrum analyzer center frequency to 897.4 MHz, span 200kHZ, RBW
and VWB 3kHz and sweeptime to 2 seconds

•

Tune LO leak to minimum with TXI/TXQ DC offset control (f0 on spectrum
analyzer screen)

Summary of Contents for NHM-7 series

Page 1: ...3 06 7HFKQLFDO RFXPHQWDWLRQ 1 0 6HULHV 7UDQVFHLYHUV VVXH 1RNLD RUSRUDWLRQ 7URXEOHVKRRWLQJ DQG 7XQLQJ QVWUXFWLRQV ...

Page 2: ...NHM 7 Troubleshooting and Tuning Instructions PAMS Technical Documentation 3DJH 1RNLD RUSRUDWLRQ VVXH This page left intentionally blank ...

Page 3: ...23 Keypad fault 3 24 RF Troubleshooting 25 Introduction to RF Troubleshooting 25 RF Key Components 26 PWB Test Points 27 Transmitter 28 General instructions on Troubleshooting 28 Transmitter troubleshooting diagram 30 Transmitter troubleshooting 2 Hagar 31 Receiver 35 Receiver troubleshooting diagram for GSM900 37 Receiver troubleshooting diagram for GSM1800 38 lLNA gainstep checking 39 Synthesize...

Page 4: ...al Documentation 3DJH 1RNLD RUSRUDWLRQ VVXH 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 ...

Page 5: ...from FPS 8 and have 2 7 V logic level FM RADIO test points are connected to FM radio lines and have 1 8 V logic level The rest of the test points are connected to the lines between UEM and UPP where the logic level is 1 8 V PURX UEMINT DBUSDA DBUSCLK FBUSRX MBUSTX FBUSTX MBUSRX CBUSDA SLEEPCLK CBUSCLK DBUSENX1 CBUSENX SLEEPX EXTRDX FMCLK FMCTRLDA FMTUNEX FMCTRLCLK FMWREN FBUSRX FBUSTX MBUS VPP GND...

Page 6: ...k 3 Power doesn t stay on or the phone is jammed 4 Charging fault 5 Plug in SIM card is out of order insert SIM card 6 Audio fault 7 Display is not working 8 Keypad fault The first thing to do is carry out a through visual check of the module Ensure in particular that a there are not any mechanical damages b soldered joints are OK VANA 2 78 V VFLASH1 2 78 V VCORE 1 8V VIO 1 8V VFLASH2 2 78 V VR1A ...

Page 7: ...s NHM 7 VVXH 1RNLD RUSRUDWLRQ 3DJH Main troubleshooting tree 1 TOP Phone totally dead Phone is dead Yes Phone doesn t start up or the phone is jammed Phone is jammed Yes Flash programming doesn t work Flash faults Yes No No Charging doesn t work No Charger Yes TOP 2 No ...

Page 8: ...hnical Documentation 3DJH 1RNLD RUSRUDWLRQ VVXH Main troubleshooting tree 2 TOP 2 Phone doesn t read SIM card SIM card Yes Audio faults No Audio faults Yes Display or LED s doesn t work No Display faults Yes Keypad doesn t work No Keypad faults Yes END No ...

Page 9: ...hone current is zero Phone current is 50mA No Is phone flash programing OK Yes Phone current is 54 mA No Is phone in LOCAL MODE Yes OK retest Yes Check BSI line X101 C241 R203 C109 R202 Are they OK No No Check X101 solder and VBATT lines Yes Change UEM Yes Repair No Phone is jammed Yes Flash faults No Phone is dead ...

Page 10: ...D line high after the startup Measure BSI pulse during Flash programming Is it OK Yes Check BSI line X101 C241 R203 C109 R202 No Measure FBUSTX line during Flash programming from testpoint J411 Is it High 1 8V Yes Check R102 If OK Change UEM No Change UPP Yes The Phone does not set Flashbus TXD line low after the line has been high No Yes Change UPP Flash faults page 2 No ...

Page 11: ...uctions NHM 7 VVXH 1RNLD RUSRUDWLRQ 3DJH Flash programming fault 2 Wrong manufactor ID and Device ID Flash faults page 2 Change FLASH Yes Is the phone totally dead No Phone is dead Yes Phone doesn t start up or the phone is jammed No Phone is jammed Yes Retest No ...

Page 12: ...nt J402 Is it high 1 8V Yes Measure VIO VCORE FLASH1 VANA VR3 voltages Are they OK Check VBATT1 6 VIO VCORE FLASH1 VANA VR3 lines Are they OK No Yes Check BSI BTEMP lines If OK UEM regulators are not working Change UEM Measure 26MHz RFClk from C660 Is it OK No Check R661 C661 R660 C660 if OK change G660 No Check R420 C420 if OK change N600 Yes Change UEM No Yes Check Z260 Z265 C260 C265 BSI BTEMP ...

Page 13: ...watchdog signal CBUSDA from testpoint J414 Is it OK Yes No Measure DBUSClk 1MHz signal from testpoint J413 Is it OK No No Read phone info Is it OK Yes Measure FBUSRX signal during phone info read from testpoint J412 Is it OK Change UEM Measure FBUSTX signal during phone info read from testpoint J411 Is it OK Yes Change UPP Change UEM Yes Change LA5 module Retest Yes No No No ...

Page 14: ...ne LOCAL mode Is it OK Yes Check BSI line X101 C241 R203 C109 R202 If OK Change UEM No Measure VSIM voltge from X386 Is it 3V Check VSIM line X386 C203 C389 If OK Change R388 If still wrong VSIM voltage Change UEM No Check SIM power UP sequency Page 35 figure 19 Is it OK Yes Check SIM lines If OK Change R388 If still fail Change UEM No Change UPP Yes END No Check X386 Yes ...

Page 15: ...it working now No Retest Yes Set phone in LOCAL mode Use Phoenix Audio Test Set EXT IN HP OUT LOOP ON No Measure DC offset voltage from Earpiece pads Is it 1 38V Check L151 C160 R164 and line If OK Change UEM No Audio faults 2 Yes Measure MICB2 voltage from XMICP pads L106 Is it 2 2V Yes Check L106 C112 R161 C163 R166 C165 R167 and line If OK Change UEM No Earpiece 2 Yes ...

Page 16: ...XH Audio fault 1B earpiece Connect EXT audio signal 1kHz sine 200mVp p in XMICP pads and Ground in XMICN Measure sine signal from earpiece pads Is it 880mVp p Earpiece 2 Measure sine signal from UEM R156 Is it 130mVp p No Retest Yes Change UEM Yes Check R156 C153 C155 R166 R167 C163 R161 and line No ...

Page 17: ...working Try change bottom connector X100 Is it working now Retest No Yes Set phone in LOCAL mode Use Phoenix Audio Test Set HP IN EXT OUT LOOP ON No Measure MICB1 voltage from MICP pads Is it 2 1V Check L105 C105 C152 C156 R152 C168 C166 C215 and line If OK Change UEM No Check C151 R157 C105 C154 and line If OK Change UEM Yes Audio faults 3 Yes ...

Page 18: ...3 Audio faults 3 Is BUZZER working Measure VBATT voltage from B301 Is it OK No Check VBATT line No Set phone in LOCAL mode Use Phoenix Audio Test Set Buzzer volume ON Yes Measure Buzzer control signal from BUZZER C307 Is it 1kHz pulses Change BUZZER B301 Yes Check C306 C307 C308 and line IF OK Change UEM No END Yes ...

Page 19: ...e led s turned on Try change UI module Is it working now No Retest Yes Measure signal from X303 pin 2 Is it 128 Hz 3 3Vp p Check X303 Yes Check R306 If OK Measure VBATT from V300 pin 4 Is it OK No Check R304 and VBATT line No Measure PWM LED s control signal from UEM Is it 128 Hz 3 8Vp p Yes Check control signal line if OK Change UEM No Check R305 V300 V329 and line Yes Display faults 2 Yes Check ...

Page 20: ...e display led s turned on Measure signal fromV301 pin 3 Is it 128 Hz 3 3Vp p Check LED s and line Measure VBATT from V301 pin 4 It is OK Check R307 and VBATT line Measure PWM LED s control signal from UEM Is it 128 Hz 3 8Vp p Check control signal line If OK Change UEM Check R305 V301 V329 and line No Yes No No Yes No Yes Display faults 3 Yes ...

Page 21: ...ults 3 Does the display start Try change UI module Is it working now No Retest Yes Measure VDD 2 78V and VDDI 1 8V Is it OK Check C303 and lines If OK Change UEM No Measure VOUT voltage Is it 8 1V Yes Check C302 X300 and lines No Measure XRES XCS Is it 1 8 V Yes Check X300 and lines If OK change UPP No END Yes Yes Check X300 No ...

Page 22: ...eypad fault 1 Keypad faults Is the power key working Measure voltage from S300 Is it HIGH No Check R301 C312 S300 and line If OK Change UEM No Measure voltage from S300 when power key is pressed Is it HIGH Yes Chech S300 Is it OK Yes Change S300 No Phone is dead Yes Phone is jammed No Keypad faults 2 Yes ...

Page 23: ...W1 ROW2 ROW3 ROW4 lines from X303 Are they 1 8V Check ROW0 4 Lines X303 If OK change Z301 If still fail change UPP No Measure SLEEPX signal from J403 when key is pressed Is it 1 8V Yes Check ROW0 4 Lines X303 If OK change Z301 If still fail change UPP No When keypad is pressed the led s are turned on Yes Display faults Yes Check ROW0 4 Lines X303 If OK change Z301 If still fail change UPP No Keypa...

Page 24: ... COL4 from S302 when S302 is pressed Is there 50us pulse Check S302 and COL4 line If OK change Z301 If still FAIL change UPP Yes Change UPP No Yes END Keypad faults 3 Yes Is volume UP key working Measure ROW0 line from S301 Is it 1 8 V Check S301 S302 lines If OK change Z301 If still FAIL change UPP No No Measure COL1 from S301 when S301 is pressed Is there 50us pulse Yes Check S301 and COL1 line ...

Page 25: ...g it diffi cult to check or change Most RF semiconductors are static discharge sen sitive So ESD protection must be taken care of during repair ground straps and ESD soldering irons HAGAR and PA are moisture sensitive and must be pre baked prior to soldering Troubleshooting discrete components resistors inductors and capacitors is done by checking component soldering Capacitors can be checked for ...

Page 26: ...on 3DJH 1RNLD RUSRUDWLRQ VVXH RF Key Components Dual PA Antenna pad Antenna switch Dual coupler Hagar RFIC Dual RX SAW EGSM RX SAW EGSM TX SAW DCS RX SAW DCS TX balun VCO balun 26MHz XO 4GHz VCO FM IF filter 1 FM IF filter 2 FM diskriminator FM receiver IC DCS LNA EGSM LNA ...

Page 27: ...t TX_I_0 TX_Q_0 RX_I RX_Q 900 PA ctrl 1800 PA ctrl 1800 antsw contr 900 antsw tx contr 900 PA in 1800 PA in FM audio 1800 PA bias 900 PA bias 4G VCO ctrl 1800 LNA out 900 LNA out LNA_P LNA_G LNAB_P LNAB_G VrefRf01 VrefRf02 VR5 VR4 VR6 VR2 VR1a Vtune IF out 2 IF out 1 FMdiscr LCtank1 LCtank2 13M clock SDATA SCLK SLE VR7 VR3 900 1st SAW out 900_RX 1800_RX 1800 1st SAW out AFC ...

Page 28: ...t 10dB attenuator otherwise the PA may be damaged Normally spectrum analyzer is used as measurement equipment NOTE Normally Spectrum analyzer maximum input power is 30dBm It is recommended to use 10dB attenuator on Spectrum analyzer input to prevent damage Set the phone module to test jig and start Phoenix service sofware Initialize connection to phone use FBUS driver when using DAU9S and COMBOX d...

Page 29: ...PAMS Technical Documentation Troubleshooting and Tuning Instructions NHM 7 VVXH 1RNLD RUSRUDWLRQ 3DJH Set power level to 5 Default 19 on GSM900 or to 0 Default 15 on GSM1800 ...

Page 30: ...NHM 7 Troubleshooting and Tuning Instructions PAMS Technical Documentation 3DJH 1RNLD RUSRUDWLRQ VVXH Transmitter troubleshooting diagram ...

Page 31: ...PAMS Technical Documentation Troubleshooting and Tuning Instructions NHM 7 VVXH 1RNLD RUSRUDWLRQ 3DJH Transmitter troubleshooting 2 Hagar ...

Page 32: ...NHM 7 Troubleshooting and Tuning Instructions PAMS Technical Documentation 3DJH 1RNLD RUSRUDWLRQ VVXH Transmitter troubleshooting 3 PA Antenna ...

Page 33: ...nstructions NHM 7 VVXH 1RNLD RUSRUDWLRQ 3DJH 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 ...

Page 34: ...DJH 1RNLD RUSRUDWLRQ VVXH A_wr i t e B_bl ank C E N T E R 8 9 7 4 0 0 MH z S P A N 2 0 0 0 MH z 2 0 s S WP 1 0 0 k H z V B W 1 0 0 k H z R B W 1 0 d B R E F 4 1 0 d B m A T T 4 0 d B GS MP OW Tue Sep 25 13 48 59 2001 REF OFS 11 0 dB Tx out signal 900 band burst mode channel 37 ...

Page 35: ...jig and start Phoenix service sofware Initialize connection to phone Use FBUS driver when using DAU9S and COM BOX driver when using FPS 8 Choose product from the menu File Choose product NPM 9 From toolbar set operating mode to Local Activate RF controls window from the menu Maintenance Testing RF Controls From the RF controls window Select band GSM900 or GSM 1800 Default GSM900 Set Active unit to...

Page 36: ...WLRQ VVXH 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 frequency 67 kHz If this signal is not seen continue to the next page Signal amplitude is 700 mVpp DC offset 1 35 V and ...

Page 37: ...4 2 7V Check Hagar serial interface burst mo de Check Z501 C505 C506 L501 Check Baseband Spectrumanalyzer 4G VCO out 3769 6MHz 30 dBm Synthesizer troubles hooting Check Hagar N600 Oscilloscope LNA_G 2 7V LNAB_G 2 7V Spectrumanalyzer V500 RFout 57 dBm Check C502 Oscilloscope V500 RFout 2 7V V500 RFin 0 8 V Check V500 C501 L502 L503 Check V500 L500 R502 Oscilloscope VR4 2 7V Check Hagar seri al inte...

Page 38: ...pe VR4 2 7V Check Hagar serial interface burst mo de Check Z551 C555 C556 L551 Check Baseband Spectrumanalyzer 4G VCO out 3685 6MHz 30 dBm Synthesizer troubles hooting Check Hagar N600 Oscilloscope LNA_P 0V LNAB_P 2 7V Spectrumanalyzer V550 RFout 58 dBm Check C552 Oscilloscope V550 RFout 2 6V V550 RFin 0 8 V Check V550 C551 L552 Check V550 R551 L550 R558 Oscilloscope VR4 2 7V Check Hagar seri al i...

Page 39: ... VHWWLQJV RQ DQG RII URXJKO G XVLQJ RKP SDVVLYH 5 SUREH 5 OHYHO DW DQWHQQD SRUW HJ G P 5 FRQWLQXRXV PRGH ORFDO PRGH GLIIHUHQFH EHWZHHQ VHWWLQJV RQ DQG RII URXJKO G XVLQJ RKP SDVVLYH 5 SUREH 1 B 1 B3 5 FRQWLQXRXV PRGH ORFDO PRGH 9 YROWDJH 21 9 YROWDJH 2 5 FRQWLQXRXV PRGH ORFDO PRGH 9 YROWDJH 21 9 YROWDJH 2 1 B 1 B3 5 FRQWLQXRXV PRGH ORFDO PRGH 9 YROWDJH 21 DQG 2 5 FRQWLQXRXV PRGH ORFDO PRGH 9 YROWD...

Page 40: ...ge to 3 9V and set the jumper connector on test jig to bypass position Set the phone module to test jig and start Phoenix service sofware Initialize connection to phone use FBUS driver when using DAU 9S and COMBOX driver when using FPS 8 Select product from the menu File Choose product NHM 7 From toolbar set operating mode to Local Activate RF controls window from the menu Maintenance Tuning RF Co...

Page 41: ...PAMS Technical Documentation Troubleshooting and Tuning Instructions NHM 7 VVXH 1RNLD RUSRUDWLRQ 3DJH Synthesizer troubleshooting diagram ...

Page 42: ... Instructions PAMS Technical Documentation 3DJH 1RNLD RUSRUDWLRQ VVXH 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 ...

Page 43: ...H A_v i ew B_bl ank C E N T E R 3 6 1 0 4 0 0 0 GH z S P A N 2 0 0 0 MH z 5 0 ms S WP 1 0 k H z V B W 1 0 k H z R B W 3 6 1 0 4 0 0 G H z MK R 1 0 d B R E F 2 0 0 d B m A T T 1 0 d B 3 0 7 2 d B m 3 6 1 0 4 0 0 G H z MA R K E R Fr i May 11 13 03 26 2001 4GHz VCO output 1800 band RX on continuous mode ...

Page 44: ...tructions PAMS Technical Documentation 3DJH 1RNLD RUSRUDWLRQ VVXH FM Radio Troubleshooting FM Radio component layout Components L101 C101 and C102 are not shown in picture Componentsare placed in baseband section FM Radio troubleshooting ...

Page 45: ...RUSRUDWLRQ 3DJH FM Radio troubleshooting diagram Note 1 RF test signal parameters Amplitude A 67 0 dBm Carrier ferquency fc 98 000 MHz Deviation f 75 kHz Modulating frequency fm 1 000 kHz RF generator internal Note 2 Use 10x probe Compare measured RF signal level to a known good product ...

Page 46: ...0 k H z R B W 1 0 8 7 0 0 0 MH z C E N T E R 1 0 d B R E F 3 0 0 d B m A T T 0 d B GS MP OW Fr i Aug 31 07 42 REF OFS 0 0 dB A_v i ew B_bl ank 2 0 s S WP 1 0 k H z V B W 1 0 k H z R B W 1 0 0 0 MH z S P A N 1 0 d B R E F 3 0 0 d B m A T T 0 d B GS MP OW Fr i Aug 31 07 48 18 2001 REF OFS 0 0 dB A_v i ew B_bl ank 2 0 s S WP 1 0 k H z V B W 1 0 k H z R B W 1 0 0 0 MH z S P A N 1 0 d B R E F 3 0 0 d B...

Page 47: ...g 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 factory tuning values are always the most accu rate ones Views in this document may change as the service software is developed Please refer to the Phoenix help files phone model specific service manual and bulletins for help ...

Page 48: ...nings 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: ...pment 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 Select Maintenance Tuning Rx Channel select filter calibratio Select Yes to start tuning with values already saved to the phone ...

Page 50: ...tation 3DJH 1RNLD RUSRUDWLRQ VVXH 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 Close the RX Channel Select Filter Calibration dialog to end tuning ...

Page 51: ...parately 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 Remember to take jig and cable attenuations into account Select Maintenance Tuning Rx calibration When RX Calibration has been started you can choose the correct band from the drop down menu Begin tuning from EGSM 900 band ...

Page 52: ...oting and Tuning Instructions PAMS Technical Documentation 3DJH 1RNLD RUSRUDWLRQ VVXH Press Start Select Default to start tuning from factory default values OK Press Calibrate Set RF generator to required frequency OK ...

Page 53: ...D RUSRUDWLRQ 3DJH Tuning values and ADC readings will be shown Typical values and limits in GSM900 RX Calibration Choose Stop to end tuning If values shown are within limits choose Yes to save values to the phone 60 60 7 SLFDO YDOXH LPLWV YDOXH VORSH 566 566 566 566 566 566 566 566 566 ...

Page 54: ... PAMS Technical Documentation 3DJH 1RNLD RUSRUDWLRQ VVXH 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 ...

Page 55: ...H 1RNLD RUSRUDWLRQ 3DJH Typical values and limits in GSM1800 RX Calibration Choose Stop to end tuning If values shown are within limits choose Yes to save values to the phone Close the RX Calibration dialog to end tuning 60 7 SLFDO YDOXH LPLWV 566 566 566 566 566 566 566 566 566 ...

Page 56: ...e 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 Select Maintenance Tuning Rx band filter response compensation Select Yes to start tuning with values already saved to the phone ...

Page 57: ...Documentation Troubleshooting and Tuning Instructions NHM 7 VVXH 1RNLD RUSRUDWLRQ 3DJH Select Manual tuning You will be asked to supply 9 different RF frequencies to the phone Set first required frequency and level OK ...

Page 58: ...ng Instructions PAMS Technical Documentation 3DJH 1RNLD RUSRUDWLRQ VVXH 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 ...

Page 59: ...roubleshooting and Tuning Instructions NHM 7 VVXH 1RNLD RUSRUDWLRQ 3DJH 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 ...

Page 60: ...x Band Filter Response Compensation EGSM900 Choose Stop write to PM area If values shown are within limits choose Yes to save values to the phone Continue tuning from GSM1800 Choose the correct band from the drop down menu Repeat the same steps as for the EGSM900 band above KDQQHO QSXW IUHTXHQF 0 0HDVXUHG OHYHO GLIIHUHQFH G LPLWV G ...

Page 61: ...1RNLD RUSRUDWLRQ 3DJH Typical values and limits in Rx Band Filter Response Compensation GSM1800 If values shown are within limits save values to the phone Close the RX Band Filter Response Compensation dialog to end tuning KDQQHO QSXW IUHTXHQF 0 0HDVXUHG OHYHO GLIIHUHQFH G LPLWV G ...

Page 62: ...sion 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 Remember to take jig and cable attenuations into account Select Maintenance Tuning Rx Am suppression Start Default settings OK ...

Page 63: ...7 VVXH 1RNLD RUSRUDWLRQ 3DJH 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 and Q line values should be 0 other values 0 31 RSSI level should be around 107 dBm ...

Page 64: ...wn are within limits Select Stop Choose Yes to save values to the phone Continue tuning from GSM1800 Choose the correct band from the drop down menu Repeat the same steps as for the EGSM900 band If values shown are within limits choose Yes to save values to the phone Close the RX AM Suppression dialog to end tuning ...

Page 65: ...alyzer 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 Remember to take jig and cable attenuations into account Select Maintenance Tuning Tx_IQTuning Select Load from product Start ...

Page 66: ...hanged 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 Use PgUp or PgDn keys Set spectrum analyzer center frequency to 897 4 MHz span 200kHZ RBW and VWB 3kHz and sweeptime to 2 seconds Tune LO leak to minimum with TXI TXQ DC offset control f0 on spectrum analyzer screen ...

Page 67: ...ence controls f0 68kHz on spectrum analyzer screen Typical TX Iq Tuning Values and tuning limits GSM 900 4 2IIVHW 2IIVHW PSOLWXGH GLIIHUHQFH 3KDVH GLIIHUHQFH A_wr i t e B_bl ank C E N T E R 8 9 7 4 0 0 0 MH z S P A N 2 0 0 0 k H z 2 0 s S WP 3 k H z V B W 3 k H z R B W 1 0 d B R E F 3 2 0 d B m A T T 4 0 d B GS MP OW Th u Au g 30 1 1 43 4 5 2001 REF OFS 11 5 dB ...

Page 68: ...in 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 Repeat the same steps as for the EGSM900 band Set spectrum analyzer center frequency to 1747 8 MHz span 200kHZ RBW and VWB 3kHz and sweeptime to 2 seconds ...

Page 69: ...RUSRUDWLRQ 3DJH Typical TX IQ Tuning Values and tuning limits GSM1800 If values shown are within limits check the Save to product tick box and choose Stop save the new values to the product Close the TX I Q Tuning dialog to end tuning 2IIVHW 4 2IIVHW PSOLWXGH GLIIHUHQFH 3KDVH GLIIHUHQFH ...

Page 70: ...ients 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 In EGSM900 band The power level tuning is made for both high and low PA Modes In GSM1800 band only for high PA mode Maintenance Tuning Tx power level tuning Remember to take jig and cable attenuations into account Select Start Load from Permanent memor...

Page 71: ...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 The current power level is shown with inverse colors The tuning value can be adjusted with and keys Tune base level and power levels 19 15 and 5 to target level Press calculate coefficients ...

Page 72: ... the previous values are saved in memory and the ones for new mode are shown Tune power levels 19 15 and 7 Levels 5 6 are not used base level tuning not needed Press Calculate coefficients Typical values EGSM900 If values shown are within limits select Stop and check Save values to phone permanent memory Select Yes to save values to phone 3RZHU OHYHO 3 KLJK PRGH 3 ORZ PRGH DVH ...

Page 73: ... 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 mode Typical values GSM1800 If values shown are within limits select Stop and check Save values to phone permanent memory Select Yes to save values to phone Close the TX Power Level Tuning dialog to end tuning 3RZHU OHYHO 3 KLJK PRGH DVH ...

Page 74: ...ce 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 Maximum input voltage is 16 V DC nominal input for tunings is 12V DC ...

Page 75: ...he phone Preparation for EM Calibration Connect DC Cable SCB 3 between JBV 1 and Vin of Phone for Charger calibra tion Connect 12 15 V from Power Supply to JBV 1 NOTE Check that connection is F BUS doesn t work with M BUS Select Maintenance Tuning Energy Management Calibration Energy Management values to be calibrated are checked Select Read from Phone to show current values in phone memory and to...

Page 76: ...ions Limits for Energy Management Calibration If values shown are within limits select Save To Phone to save values to phone NOTE Only values of checked tunings Battery size Battery Temperature etc will be saved Close the Energy Management Calibration dialog to end tuning 3DUDPHWHU 0LQ 0D JDLQ RIIVHW 6 JDLQ 7 03 JDLQ 9 7 JDLQ 9 7 RIIVHW 9 5 5 ...

Page 77: ...PAMS Technical Documentation Troubleshooting and Tuning Instructions NHM 7 VVXH 1RNLD RUSRUDWLRQ 3DJH This page left intentionally blank ...

Page 78: ...NHM 7 Troubleshooting and Tuning Instructions PAMS Technical Documentation 3DJH 1RNLD RUSRUDWLRQ VVXH ...

Search results

Summary of Contents for NHM-7 series

Reviews:

Related manuals for NHM-7 series

Brands by name

Popular brands

Nokia NHM-7 series, Troubleshooting Manual

Search results

Summary of Contents for NHM-7 series

Reviews:

Related manuals for NHM-7 series

Brands by name

Popular brands