Nokia NPM-6 Series Troubleshooting Instructions Download Page 9

Page: 9 / 54

CCS Technical Documentation

Troubleshooting Instructions

Company confidential

NPM-6/6X

Issue 2 06/03



Page 9

Transmitter troubleshooting diagram

Figure 3: Transmitter troubleshooting

Check output signal level:

TX signal found ?

Yes

Tune

dead

start TX power level

Tune Tx DAC values

PA & ant switch

TX troubleshooting

TX OK

+32...+33dBm @897.4 MHz (GSM900)
+29...+30dBm @1747.8 MHz
(GSM1800 & GSM1900)

OK ?

Check
all power
levels,
OK ?

TX power
levels,
OK ?

Yes

Check output signal
on 500 MHZ span
Signal found on
incorrect frequency ?

Yes

Synthesizer
troubleshooting

Check with RF probe
signal level on
PA input >=0dBm (*

OK ?

Yes

HELGA
troubleshooting

Yes

tuning and check
tuned RAC values:
Highest level~700...900
Lowest level ~190...210
Base levle ~160...190

Major differences ?

Check with oscilloscope:
PA ctrl voltage
>1.5V peak OK ?

troubleshooting

Check control loop
components

OK ?

Replace HELGA

*(When 1kOhm passive probe is used,
correct the measurement result by +26dB

Replace
faulty
component(s)

Yes

(EGSM900

Summary of Contents for NPM-6 Series

Page 3: ...smitter signals 12 EGSM900 GSM1800 and GSM1900 Receiver 14 General instructions for Rx troubleshooting 14 Troubleshooting diagram for EGSM900 receiver 18 Troubleshooting diagram for GSM1800 receiver 19 Troubleshooting diagram for GSM1900 receiver 20 Synthesizer 21 General instructions for synthesizer troubleshooting 21 Synthesizer troubleshooting diagram 22 Pictures of synthesizer signals 23 Baseb...

Page 4: ...ge Most RF semiconductors are static discharge sensitive So ESD protection must be taken care of during repair ground straps and ESD soldering irons HELGA and PA are moisture sensitive so parts must be pre baked prior to solder ing Apart from key components described in this document here are a lot of discrete compo nents resistors inductors and capacitors which troubleshooting is done by checking...

Page 5: ...CCS Technical Documentation Troubleshooting Instructions Company confidential NPM 6 6X Issue 2 06 03 Copyright Nokia All rights reserved Page 5 RF Key component placement Figure 1 Component placement 1 ...

Page 6: ...NPM 6 6X Companyconfidential Troubleshooting Instructions CCS Technical Documentation Page 6 Copyright Nokia All rights reserved Issue 2 06 03 RF Measurement points Figure 2 Component placement 2 ...

Page 7: ...position Connect a RF cable to the module test jig MJS 49 RF connector to and to measurement equipment or at least 10dB attenuator otherfwise the PA may be damaged Normally Spectrum analyzer is used as measurement equipment Attention Normally Spectrum analyzer maximum input power is 30dBm It is recom mended to use 10dB attenuator on Spectrum analyzer input to prevent damage Set the phone module to...

Page 8: ...ocumentation Page 8 Copyright Nokia All rights reserved Issue 2 06 03 Set Rx Tx channel to 37 on EGSM900 band or 700 on GSM1800 band or 661 on EGSM1900 Defaults Set Tx PA mode to Free Default Set power level to 5 Default 19 on EGSM900 or to 0 Default 15 on GSM1800 or GSM1900 ...

Page 9: ...M1900 OK Check all power levels OK TX power levels OK No Yes No Check output signal on 500 MHZ span Signal found on incorrect frequency Yes Synthesizer troubleshooting Check with RF probe signal level on PA input 0dBm OK Yes HELGA troubleshooting No Yes tuning and check tuned RAC values Highest level 700 900 Lowest level 190 210 Base levle 160 190 Major differences Check with oscilloscope PA ctrl ...

Page 10: ...pe TXI TXQ signals VR1 VR2 VR4 VR5 VR6 2 8V VrefRF01 1 35 V HELGA serial interface TXP TXC signals OK No Check with RF probe 4G VCO out signal 3589 6 MHz GSM900 3495 6 MHz GSM1800 3760 MHz GSM1900 Level 10dBm OK No dead Replace HELGA Yes Check modulator output components OK Replace faulty component s When 1kOhm passive probe is used correct the measurement result by 26dB Check with RF probe 4GVCO ...

Page 11: ...input 0dBm OK Yes Replace ant switch Yes When 1kOhm passive probe is used correct the measurement by 26dB Check with oscilloscope VANT_1 GSM900 VANT_2 GSM1800 VANT_3 GSM1900 OK Check with oscilloscope VBATT 4V VTXB 2 8 V pulsed VTxLO_GSM 0V GSM900 OK Check VANT lline components OK Replace PA Replace HELGA Replace faulty component s Check components around PA OK Replace faulty component s Yes Yes Y...

Page 12: ...h at R703 C703 VPCTRL_1800 1900 power level high at R704 C704_ VPC TX I Q at R516 517 power level high Random data VANT_1 EGSM900 TX at C804 VANT_2 GSM1800 TX at C835 VANT_3 GSM1900 TX at C805 OV no signal Flatline on Oscilloscope screen VANT_1 VANT_2 VANT_3 VTXB_900 at C713 VTXB_1800_1900 at C714 TXP at J504 200mV div 100us div 1 200mV div 100us div 500mV div 100us div 500mV div 100us div 1 500mV...

Page 13: ...ll rights reserved Page 13 Figure 7 TX OUT signal Tx out signal 900 band burst mode channel 37 A_ wr i t e B_ b l a n k 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 G S MP O W Tu e Se p 2 5 1 3 4 8 5 9 2 0 0 1 REF OFS 1 1 0 d B ...

Page 14: ...ct an RF cable to the module test jig MJS 49 RF connector and to RF signal gen erator Set the phone module to test jig and start Phoenix service sofware Initialize connection to phone use FBUS driver when using DAU9S and COMBOX driver when using FPS 8 Choose product from the menu File Choose product NPM 6 From toolbar set operating mode to Local Activate RF controls window from the menu Maintenanc...

Page 15: ...signal to the RF connector remember to compensate for cable attenuation Measuring with an oscilloscope on RXI or RXQ following screens should be seen on a working EGSM900 GSM1800 or GSM1900 receiver Figure 8 RX I Q signal burst mode input level 90dBm Figure 8 RX I Q signal burst mode input level 90dBm on page 15 Receiver I or Q burst mode signal channel 37 measured from testpoint RXI or RXQ with 9...

Page 16: ...ween different bands as well Figure 9 GSM1900 RX I or Q signal trace2 burst mode For GSM1900 receiver burst mode I or Q signal at ch 661 with input signal 1960 067MHz level 90 dBm at RF connector Trace2 With wider time scaling both monitoring and own RX bursts are seen 1st burst shorter is monitoring and 2nd burst longer is own RX burst Trace1 External LNA VCC supply voltage at burst mode input le...

Page 17: ...ference 90 deg between signals Figure 10 RX I Q phase difference 90 deg between signals on page 17 Detailed view of EGSM900 continuous mode RX I and Q signals measured from testpoints RXI and RXQ simultaneously Used channel 37 input signal 942 467 MHz level 90 dBm at antenna port AGC setting 12 Phase difference should be 90 degrees between RX I and Q signals at all bands ...

Page 18: ...l interface burst mode Synthesiszer trou bleshooting Spectrumanalyzer 4G VCO out 3769 6MHz 30 dBm Oscilloscope VANT_1 3 0V Oscilloscope Check HELGA serial interface burst mode Check HELGA N500 Check Base band Spectrumanalyzer reading with 1 kohm passive probe right val ue add 34 dB All spectrumanalyzer reading values are measured with 2 5 kohm passive probe use tweezers to connect the probe ground...

Page 19: ...l Oscilloscope VR1 3 6 2 7V Check HELGA serial interface burst mode Check C838 C839 L821 L 872 C836 C837 V801 Oscilloscope VANT_1 3 0V Oscilloscope Check HELGA se rial interface burst mode Check HELGA N600 Check Base band Spectrumanalyzer reading with 1 kohm passive probe right val ue add 26 dB All spectrumanalyzer reading values are measured with 1 kohm passive probe use tweezers to connect the p...

Page 20: ...HELGA se rial interface burst mode Check HELGA N500 Check Base band Check C831 L811 Spectrumanalyzer reading with 1 kohm passive probe right val ue add 26 dB All spectrumanalyzer reading values are measured with 1 kohm passive probe use tweezers to connect the probe ground to the nearest PWB ground Reading value is represented without 26 dB compensation Spectrumanalyzer Antenna Switch input 84 dBm...

Page 21: ...ly voltage 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 DAU9S and COMBOX driver when using FPS 8 Select product from the menu File Choose product NPM 6 From toolbar set operating mode to Local Activate RF controls window from the menu Maintenance Testi...

Page 22: ... 6 MHz GSM900 3495 6 MHz GSM1800 3760 MHz GSM1900 Level 10dBm OK VCO out signal level 10dBm Check balun output levels and solder joints OK Check output signal on 1 GHz span Signal found on incorrect frequency Check with oscilloscope 4G VCO Vcc 2 7V OK Baseband troubleshooting Check with oscilloscope Check with oscilloscope VCO control voltage VCO control voltage from VCO pin from VCO pin 0V 4 0 V ...

Page 23: ...ng Instructions Company confidential NPM 6 6X Issue 2 06 03 Copyright Nokia All rights reserved Page 23 Pictures of synthesizer signals Figure 15 26MHz at G501 pin out Figure 16 26MHz RFCLK at R420 C420 Figure 17 1800 TX channel 512 burst mode ...

Page 24: ...2 06 03 Figure 18 1900 RX channel 810 continuous mode Figure 19 VCO output 1800 band RX on continuous output A _viewB _b lan k C EN TER 3 685600 G H z SPA N 1 000 M H z 50 m s SW P 10 kH z VB W 10 kH z R B W 1 000 M H z SPA N 10dB R EF 4 0 dB m A TT 10 dB 3 97 dB m 3 685604 G H z M A R K ER W edA u g21 21 23 21 2002 R E FO F S 34 0 d B ...

Page 25: ...ved Page 25 Baseband Troubleshooting BB Measurement points Figure 20 NPM 6 BB Measurement points Top VCORE VFLASH2 VFLASH1 VANA VSIM VIO MBUSTX FBUSRX CBUSDA CBUSENX MBUSRX FBUSTX CBUSCLK UEMINT DBUSCLK SLEEPX DBUSDA PURX DBUSEN1X SLEEPCLK FLSCSX FLS2CSX EXTRDX EXTWRX FLSCLK VDD SCLK GND SDA VLED RESX VLED CSX VDDI BSI BSI VBATT GND ...

Page 26: ...Troubleshooting Instructions CCS Technical Documentation Page 26 Copyright Nokia All rights reserved Issue 2 06 03 Figure 21 NPM 6 BB Measurement points Bottom GND FBUSRX FBUSTX VSIM CHARGE GND MBUS VPP SIMDATA SIMCLK SIMRST CHARGE ...

Page 27: ...e 27 Troubleshooting diagrams The following diagrams describe baseband troubleshooting Phone is dead Phone current is zero Phone current is 50mA Is phone in LOCAL mode Is phone flash proramming OK Check X100 Change UEM Repair Ok retest Check BSI line X100 C240 R203 C100 R206 OK Phone is jammed Flash faults Yes No Yes No No Yes Yes No Yes No ...

Page 28: ...epClk from testpoint J404 Is it OK Measure 26MHz RFClk from R420 Is it OK Measure PURX signal from testpoint J402 Is it HIGH 1 8V Measure 26MHz RFCLK from C660 Is it OK Measure 32kHz SleepClkfrom B200 Is it OK Check VBATT1 6 VIO VCORE VFLASH1 VANA VR3 lines Are they OK Phone is jammed 2 Check BSI BTEMP lines If OK change UEM Check B200 C209 C210 Change UEM Check C576 R520 C540 If OK change G501 Ch...

Page 29: ... 30s Measure watchdog signal CBUSDA from J414 Is it OK Read phone info Is it OK Measure DBUSClk 1MHz signal from testpoint J413 Is it OK Measure FBUSRx signal during phone info read from testpoint J412 Is it OK Measure FBUSTx signal during phone info read from testpoint J411 Is it OK Change UPP Change UPP Change UEM Retest Yes No No Yes No No Yes Yes No Change UEM No Yes Retest Yes ...

Page 30: ... t set FlashBus TxD line HIGH after the startup Measure BSI pulse during Flash programming Is it OK Phone doesn t set FlashBus TxD line LOW after the line has been set HIGH Measure FBusTx line during Flash programming TP 411 Is it HIGH 1 8V Check BSI line X100 C240 R203 C100 R206 Check FBUSTx line If OK Change UEM Change UPP Flash faults 2 Yes No Yes No No Yes Yes No ...

Page 31: ... confidential NPM 6 6X Issue 2 06 03 Copyright Nokia All rights reserved Page 31 Flash faults 2 Wrong manufacturer ID or Device ID Phone is totally dead Phone doesn t start up or phone is jammed Change Flash Phone is dead Phone is jammed Retest Yes No Yes No Yes No ...

Page 32: ...rd faults Set phone to LOCAL mode Is it OK Measure VSIM voltage from X386 Is it 3V 1 8V Check SIM power up sequency Is it OK Check BSI line X100 C240 R203 R206 If OK change UEM Check VSIM line X386 C203 C370 L386 If OK change R388 If still wrong VSIM change UEM Check SIM lines If OK change R388 If still fail change UEM Change UPP END Check X386 Yes No No Yes No Yes No Yes ...

Page 33: ...s it typ 7 2V Set phone to LOCAL mode Set VBATT to 4 2V Start Display test with Phoenix Set display ON Board to boad connector fault in displaymodule or faulty module Retest Check lines of CALLED1 and DLIGHT If lines are OK change UEM Check C302 C303 L300 V30 0 R301 R302 R303 R325 C304 If OK change N300 Check V311 V312 R311 R312 Retest Check CALLED1 N300 8 and DLIGHT V312 IN Are they HIGH Measure ...

Page 34: ...s it typ 7 2V Set phone to LOCAL mode Set VBATT to 4 2V Start Display test with Phoenix Set display ON Board to boad connector fault in displaymodule or faulty module Retest Check lines of CALLED1 and DLIGHT If lines are OK change UEM Check C302 C303 L300 V30 0 R301 R302 R303 R325 C304 If OK change N300 Check V311 V312 R311 R312 Retest Check CALLED1 N300 8 and DLIGHT V312 IN Are they HIGH Measure ...

Page 35: ... start Try to change UI module Is it working now Check signals RESX J306 SDA J305 SCLK J307 CSX J304 Is it OK Board to boad connector fault in display module or faulty module Retest Check lines of VFLASH1 and VIO If lines are OK change UEM Check lines of display control If OK change UPP Change X302 Measure VDDI J301 2 78V and VDD J300 1 8V Are they OK No Yes No No END Yes No No ...

Page 36: ... J310 J311 and GND pads Is it 1 38V Measure MICB2 voltage from XMIC L102 input Is it 2 2V Change old UI module back Set phone to LOCAL mode Using Phoenix Audiotest set EXT IN HP OUT LOOP ON Check L150 C155 R151 and line If OK change UEM Check L102 C116 C150 R153 R154 and line If OK change UEM Check earpiece contact springs from old UI module and change earpiece and foam to old UI module Retest Aud...

Page 37: ...g now Measure MICB1 voltage from J110 pad Is it 1 38V Restore old C cover Set phone to LOCAL mode Using Phoenix Audiotest set HP IN EXT OUT LOOP ON Check L101 L108 C151 C152 C153 R156 R157 R176 If OK change UEM Check mic contact springs from old C Cover assembly If not OK change PopPort assembly to old C cover Retest No Yes No No Audio faults 3 Check C151 R157 C105 C154 and line If OK change UEM i...

Page 38: ...ights reserved Issue 2 06 03 Earpiece 2 Measure sine signal from earpiece pads J310 J311 Is It 880mVpp Connect EXT audio signal 1kHz sine 200mVpp between XMICP and XMICN pads X101 11 12 Measure sine signal from UEM R151 R152 Is it 130mVpp Change UEM Check R151 R152 C155 L150 and lines Change UPP Retest No Yes Yes No ...

Page 39: ...d freq to 1kHz Measure DC level between IHF pads J156 J157 to GND Is it 1 8V Measure AC level between IHF pads J156 J157 Is it 1 0Vrms IHF speaker or contact springs fault Restest Check signal in C161 Is it OK Check IHF PA controls on J152 J523 J154 Is it OK No Yes Yes Speaker contact springs faults Retest Change UPP Change IHF PA N150 Yes No Yes Check C161 C160 R163 C169 If OK then change UEM No ...

Page 40: ...reserved Issue 2 06 03 Keyboard faults Is the powerkey working Measure voltage from S302 Is it HIGH Check S302 Is it OK Check R306 C310 S302 and POWERONX line If OK change UEM Change S302 Phone is dead Measure voltage from S302 when powerkey is pressed Is it HIGH No Yes No Keyboard faults 2 Yes Yes Yes Yes Phone is jammed ...

Page 41: ...om J403 when key pressed Is it 1 8V When keypad is pressed the LED s are turned on UI connector pad fault in UI board or faulty UI module Retest Check ROW0 4 lines X301 If OK change Z300 If still fails change UPP Check ROW0 4 lines X301 If OK change Z300 If still fails change UPP Check ROW0 4 lines X301 If OK change Z300 If still fails change UPP Measure ROW0 4 lines from X301 Are they HIGH No Yes...

Page 42: ...nge UPP Check S300 and COL1 lines If OK change Z300 If still fail change UPP Measure COL1 from S300 when key is pressed Is there 50us pulse No Yes No No Change UPP Yes Measure ROW0 line from S301 Is it 1 8v Check S300 S301 and lines If OK change Z300 If still fail change UPP Check S301 and COL4 lines If OK change Z300 If still fail change UPP Measure COL4 from S301 when key is pressed Is there 50u...

Page 43: ...oltage between V313 3 Is it typ 7 2V Set phone to LOCAL mode Set VBATT to 4 2V Start Display test with Phoenix Set Keyboard lights ON UI board pads fault or faulty UI board Retest Check lines of CALLED1 and KLIGHT If lines are OK change UEM Check C302 C303 L300 V30 0 R301 R302 R303 R325 C304 If OK change N300 Check V313 V314 R313 R314 Check CALLED1 N300 8 and KLIGHT V314 IN Are they HIGH Measure v...

Page 44: ...s HIGH to LOW 0 6V Check ACI line trans LOW to HIGH Is it OK Audio OK Insert mono headset HDB 4 Check PopPort connecor pin 3 ACI and line to systemboard L106 R103 R109 C103 If OK change UEM Retest Remove headset Check PopPort connecor pin 3 ACI and line to systemboard L106 R103 R109 C103 If OK change UEM Retest Check C107 C108 L103 C114 C119 R105 R106 R164 R165 C157 Audio fault 3 No No Yes No Yes ...

Page 45: ...tart up sequency like it Audio OK Insert stereo headset HDS 3 Wait 5s Check PopPort connecor pin 4 Vout and line to systemboard L107 C102 C112 C101 R111 If ok check GENIO 0 signal on N100 VEN If it is HIGH change N100 Reinsert headset Check PopPort connecor pin 3 ACI and line to systemboard L106 R103 R109 C103 If OK change UEM Retest Check C107 C108 C109 C117 L103 L104 C113 C114 C118 C119 R105 R10...

Page 46: ... Is it typ 8 6V Measure voltage V317 3 Is it typ 7 2V Set phone to LOCAL mode Set VBATT to 4 2V Start Display test with Phoenix Set Flashlight ON Check lines of CALLED1 and CALLED2 If lines are OK change UEM Check C302 C303 L300 V30 0 R301 R302 R303 R325 C304 If OK change N300 Check V320 V317 R315 R316 Check CALLED1 N300 8 and CALLED2 V320 IN Are they HIGH No Change V318 V319 Yes No Yes No Display...

Page 47: ...onfidential NPM 6 6X Issue 2 06 03 Copyright Nokia All rights reserved Page 47 Self tests If any self test is failed contact service information will be shown on display Set phone to LOCAL mode Use Phoenix BB Self Tests Run All Self test show now what test are failed ...

Page 48: ...mpanyconfidential Troubleshooting Instructions CCS Technical Documentation Page 48 Copyright Nokia All rights reserved Issue 2 06 03 FM Radio troubleshooting FM Radio component layout Figure 22 Component placement ...

Page 49: ...e 2 06 03 Copyright Nokia All rights reserved Page 49 Figure 23 Trace layout Figure 24 FM radio block layout Components L103 L104 L105 C107 C108 C109 C117 C162 C163 R164 R165 R166 and R167 are not shown in the picture Those components are placed in baseband sec tion near audio amplifier N150 ...

Page 50: ...otes to FM Radio troubleshooting diagram Use 1MHz 1X probe when measuring Audio and clock signals with oscilloscope Use active RF probe when measuring frequencies with spectrum analyzer Note 1 RF test signal parameters Amplitude A 67 0 dBm Carrier frequency fc 98 000 MHz Deviation f 75 kHz Modulating frequency fm 1 000 kHz RF generator internal FM stereo mode R L pilot state ON ...

Page 51: ...gnal from C162 and C163 Is it 1kHz 0 5 0 8Vp p Set Radio and RF generator to 87 5 and 108 0 MHz Measure Audio from C162 and C163 Are both cases 1 kHz 0 5 0 8 Vp p Check V356 V357 L356 L357 C357 C358 C362 R359 R360 Test again with 87 5 and 108 0 MHz Measure audio from C162 and C163 Both OK Check C107 C108 C109 C117 L105 C367 C378 C379 L358 Measure signal from C162 C163 Is it 1kHz 0 5 0 8 Vp p Check...

Page 52: ...ht Nokia All rights reserved Issue 2 06 03 Diagrams of FM radio signals Figure 26 Oscilloscope screen shot Audio output Signal 1 Audio output from PWB test points J103 and J104 with FM test signal volume 100 Signal 2 Audio output from FM radio pins 22 and 23 same as in C162 and C163 with FM test signal ...

Page 53: ...rom FM radio pins 3 and 4 the other ends of V356 and V357 with FM test signal RES BW 10 kHz VBW 10 kHz SWP 1 00 sec AT 0 dB REF 20 0 dBm LOG 10 dB CENTER 98 0000 MHz SPAN 300 0 kHz 71 03 dBm MKR 97 9280 MHz PEAK WA SB SC FS CORR 15 51 49 03 JUL 2002 SWEEP CONT SGL FREE RUN VIDEO LINE EXTERNAL SYNC CRD TV TRIG RES BW 10 kHz VBW 10 kHz SWP 20 0 msec AT 10 dB REF 0 dBm LOG 10 dB CENTER 196 450 MHz SP...

Search results

Summary of Contents for NPM-6 Series

Reviews:

Nokia NPM-6 Series, Troubleshooting Instructions, Page: 9 / 54

Search results

Summary of Contents for NPM-6 Series

Reviews: