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Nokia Customer Care

ISSUE 1 09/2004

6-Troubleshooting

Instructions

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Страница 3: ...ructions for GSM850 RX troubleshooting 23 Troubleshooting diagram for GSM850 Receiver 24 General instructions for RH 60 GSM1900 RX troubleshooting 26 Phoenix commands 26 Troubleshooting diagram for GSM1900Receiver 27 Measurement points in the receiver 29 RH 60 transmitter troubleshooting 31 Measurement points for the transmitter 31 General instructions for RH 60 GSM TX troubleshooting 32 GSM850 TX...

Страница 4: ...rging troubleshooting 2 16 Fig 13 RF key components 18 Fig 14 Supply points at UEM D200 19 Fig 15 Supply point at Mjoelner N600 19 Fig 16 GSM850 RF controls window 21 Fig 17 GSM850 Receiver troubleshootingt 22 Fig 18 RX850 I Q signal waveform 23 Fig 19 GSM1900 RF controls 24 Fig 20 GSM1900 receiver troubleshooting diagram 25 Fig 21 RX1900 I Q signal waveform 26 Fig 22 RX measurements point at the ...

Страница 5: ...hielding can UEM D200 41 Fig 40 TX measuremnet points in the PA N700 shielding can 42 Fig 41 TX measurement point in Mjolner N600 shielding can 42 Fig 42 GSM900 RF controls window 43 Fig 43 VPCTRL_G and TXC signal 44 Fig 44 RF controls window 45 Fig 45 VCXO 26 MHz waveform 46 Fig 46 PLL Troubleshooting diagram 47 Fig 47 Figure 22 Measurement point for VCXO supply 48 Fig 48 Figure 23 Measurement po...

Страница 7: ... the Nokia 2600 troubleshooting diagrams Test points are described and listed in the A3 schematic diagrams Troubleshooting diagrams In this section Troubleshooting diagrams is provided for the most common problems of the No kia 2600 NOTE Since both D200 UEM and D400 UPP are underfilled they can not be replaced If either D200 or D400 is defective the whole PWB has be discarded ...

Страница 8: ... dead troubleshooting Phone is dead X105 VBAT 3 6VDC No Yes Check L260 L261 L262 L263 L264 L265 C260 C261 C262 C263 C264 C265 Check X105 Yes No J402 PURX 1 8VDC 1 sec after power key is pressed L260 L261 L262 L263 L264 L265 C260 C261 C262 C263 C264 C265 Voltage 3 6VDC R426 26 MHz clock min 300mVACpp probe Cin 10 13 pF 10M C227 VR3 2 78VDC J404 Sleep clock is 32 768 kHz 1 8Vpp Check C227 PWB Else d...

Страница 9: ...t a fault The fault information messages could be Phone doesn t set FBUS_TX line low Because of the use of uBGA components it is not possible to verify if there is a short circuit in control and address lines of MCU UPP and memory flash Figure 2 Flash programming fault Flash prgramming do not work Error from prommer Phone doesn t set FBUS_TX line low Yes Check PW B Else defective D200 J409 J410 J4...

Страница 10: ...watchdog will run out after approximately 32 seconds Unfortunately the service routine can not be measured Figure 3 Phone jammed troubleshooting Power doesn t stay on or phone is jammed J404 Sleep clock 32 768 kHz 1 8Vpp Yes Check D450 Keymat Lightguide PWB Else defective D400 UI functionality and keys react to pressure Check PWB Else defictive D200 Yes No No J402 PURX 1 8VDC 1 sec after power key...

Страница 11: ...n sense and experience to decide which test case to start error hunting at Figure 4 Troubleshooting when Contact Service message seen Display shows Contact Service EarDa MicDa between UPP and UEM Check PWB Else defective D200 or D400 MBUS interface between UPP and UEM AuxDa UEMInt between UPP and UEM Yes No SleepX SleepClk between UPP UEM Key is stucked TXI QD RXI QD SIM interface between UPP UEM ...

Страница 12: ...231 Voltage 1 35VDC All during GSM frame call mode Use TXP on C646 as trigger Check C222 C223 C224 C225 C226 C227 PWB Else defective D200 or D400 J421 J422 J423 Check RF serial bus during GSM frame Logic HIGH 1 8VDC Logic LOW 0VDC RFBUSCLK J421 RFBUSDA J422 RFBUSEN1X J423 C222 C223 C224 C225 C226 C227 Voltage 2 78VDC All during GSM frame call mode Use TXP on C646 as trigger No Yes Check PWB Else d...

Страница 13: ...witched on the phone first check for a 1 8V SIM card and then a 3V SIM card The phone will try this four times whereafter it will display Insert SIM card Figure 6 SIM troubleshooting Figure 7 Signal diagram Check for SIM voltage during power up Ch1 VSIM Ch2 RESET Ch3 CLOCK Ch4 DATA Display shows Insert SIM Card Check X387 R386 PWB Else defective D200 X387 Verify that phone checks for 1 8V SIM and ...

Страница 14: ...ror SIM card rejected means that the ATR message received from SIM card is corrupt ed e g data signal levels are wrong The first data is always ATR and it is sent from card to phone For reference a picture with normal SIM power up is shown below Figure 8 Signal diagram Normal SIM power up sequence Ch1 VSIM Ch2 RESET Ch3 CLOCK Ch4 DATA ...

Страница 15: ...00 Z150 R161 Check Z150 R161 is working correctly no short open circuit Replace Earpiece Yes Error still present Microphone do not work and the isn t any mechanical problem Check R165 C168 PWB Else defctive D200 No Error still present R165 Check voltage level on R165 towards UEM bias 2 1V Replace Z100 Yes Replace System Connoctor Z100 Check Z100 is working correctly no short open circuit No R153 C...

Страница 16: ...Z102 Defective D200 R183 Z102 Check R183 Z102 is working correctly no open circuit No Headset microphone do not work and the isn t any mechanical problem Replace C183 and or Z102 Defective D200 R166 Check voltage level on R166 towards UEM bias 2 1V No R152 R165 R168 C172 C170 C173 C174 Z101 Check XMIC line to UEM D200 Check R166 R151 C171 R151 Check voltage level on R151 towards UEM bias 1 0V 1 4V...

Страница 17: ...ting 1 Phone is OFF battery is completely empty 3 1VDC and no current from charger when connected Check F100 L100 V100 C100 R200 System connector L100 VCHAR 2 1VDC No Defective D200 Yes Phone is ON or OFF battery nominal voltage 3 6VDC and no current from charger when connected Check F100 L100 V100 C100 R200 System connector L100 VCHAR 3 6VDC No Defective D200 or D400 Yes ...

Страница 18: ...5 R202 R206 C240 R206 Voltage on R206 towards D200 is 0 8VDC when power is connected BSI must be 75K No Check PWB Yes R207 Voltage use scope on R207 towards D200 is 0 9VDC at peak BSI must be 47K Check X105 R202 R207 C220 No R200 Voltage on R200 towards D200 same as VBAT voltage Check R200 PWB Else defective D200 v R200 Voltage rises slowly on R200 towards D200 when charger is connected Check PWB ...

Страница 19: ...e then bear in mind that the voltages displayed may be slightly different Always make sure the measurement set up is calibrated when measuring RF parameters on the antenna pad Remember to include the loss in the module repair jig when realigning the phone Most RF semiconductors are static discharge sensitive So ESD protection must be ap plied during repair ground straps and ESD soldering irons Mjo...

Страница 20: ...ght 2004 Nokia All Rights Reserved RF key component placement Figure 13 RF key components Table 1 RF component placement N600 Mjoelner RF IC Z601 PCN RX SAW Z602 EGSM RX SAW Z603 EGSM TX SAW B600 26 MHz crystal G600 VCO 4 0 GHz UHF VCO N700 Power Amplifier PA Z700 RX TX switch ...

Страница 21: ...CONFIDENTIAL 21 Copyright 2004 Nokia All Rights Reserved RH 59 60 Nokia Customer Care Refer to the picture below for measuring points at the UEM D200 Figure 14 Supply points at UEM D200 Figure 15 Supply point at Mjoelner N600 ...

Страница 23: ...bleshooting General instructions for GSM850 RX troubleshooting Connect the phone to a PC with the module repair jig Start Phoenix and establish connection to the phone Phoenix commands RF Controls Band GSM 850 RX Continuous mode Channel 190 AGC 8 FEG ON 46 dB The setup should now look like this Figure 16 GSM850 RF controls window ...

Страница 24: ...ope at RX i Q signal 588mVpp DC offset 1 35V Freq 67 71kHz YES YES NO NO YES YES GSM850 Check RX TX Oscilloscope Check Mjoelner Check chain OK switch at RX850 Z700 56dBm check VC1 and VC2 at Z700 Signal 0V RX TX switch Spectrum analyzer Spectrum analyzer Oscilloscope Check Check GSM850 SAW filter Z602 output 65dBm NO YES NO YES NO YES SAW filter Z602 Inductor L603 L602 check signal after inductors...

Страница 25: ...004 Nokia All Rights Reserved RH 59 60 Nokia Customer Care By measuring with an oscilloscope at RXIP or RXQP on a working GSM 850 receiver this pic ture should be seen Signal amplitude peak peak 789 mV DC offset 1 2 V Figure 18 RX850 I Q signal waveform ...

Страница 26: ...al instructions for RH 60 GSM1900 RX troubleshooting Connect the phone to a PC with the module repair jig Start Phoenix and establish connection to the phone Phoenix commands RF Controls Band GSM 1900 RX Continuous mode Channel 661 AGC 8 FEG ON 46 dB The setup should now look like this Figure 19 GSM1900 RF controls ...

Страница 27: ...illoscope at RX i Q signal 588mVpp DC offset 1 35V Freq 67 71kHz YES YES NO NO YES YES GSM850 Check RX TX Oscilloscope Check Mjoelner Check chain OK switch at RX1900 Z700 56dBm check VC1 and VC2 at Z700 Signal 0V RX TX switch Spectrum analyzer Spectrum analyzer Oscilloscope Check Check PCN SAW filter Z602 output 65dBm NO YES NO YES NO YES SAW filter Z601 Inductor L601 L611 check signal after induc...

Страница 28: ... ISSUE 1 09 2004 Copyright 2004 Nokia All Rights Reserved By measuring with an oscilloscope at RXIP or RXQP on a working GSM 1900 receiver this pic ture should be seen Signal amplitude peak peak 460 mV DC offset 1 2 V Figure 21 RX1900 I Q signal waveform ...

Страница 29: ...DENTIAL 29 Copyright 2004 Nokia All Rights Reserved RH 59 60 Nokia Customer Care Measurement points in the receiver Figure 22 RX measurements point at the RX TX Switch Z700 Figure 23 Measurements points at the RX Filters Z601 Z602 ...

Страница 31: ...okia All Rights Reserved RH 59 60 Nokia Customer Care RH 60 transmitter troubleshooting Measurement points for the transmitter Figure 25 TX measurement points in the PA N700 shielding can Figure 26 TX measurement point in Mjolner N600 shielding can Power amp ...

Страница 32: ...d signal act as normal RF cable should be connected to measurement equipment or to at least a 10 dB attenuator otherwise the PA may be damaged Start Phoenix Service Software and establish a connection to the phone e g FBUS Select File and Product Gemini Select Maintenance Testing and RF Controls Band GSM 850 Active Unit TX Tx Power Level 5 Tx Data Type Random Your screen should look like Figure 27...

Страница 33: ...TIAL 33 Copyright 2004 Nokia All Rights Reserved RH 59 60 Nokia Customer Care GSM850 TX output power Measure the output power of the phone it should be around 32 1 dBm Remember the loss in the jig around 0 3 dB Figure 28 VPCTRL_G TXC ...

Страница 34: ...ld be connected to measurement equipment or to at least a 10 dB attenuator otherwise the PA may be damaged Start Phoenix Service Software and establish a connection to the phone e g FBUS Phoenix commands RF Controls Band GSM 1900 RX Continuous mode Channel 661 Your screen should look like Figure 29 GSM1900 RF controls screen shot GSM1900 TX output power Measure the output power of the phone It sho...

Страница 35: ...ISSUE 1 09 2004 COMPANY CONFIDENTIAL 35 Copyright 2004 Nokia All Rights Reserved RH 59 60 Nokia Customer Care Troubleshooting diagram for GSM1900 TX Figure 30 GSM1900 TX troubleshooting ...

Страница 37: ... Instructions for RH 59 GSM900 RX Trouble shooting Connect the phone to a PC with the module repair jig Start Phoenix and establish connection to the phone Phoenix commands RF Controls Band GSM 900 RX Continuous mode Channel 37 AGC 8 FEG ON 46 dB The setup should now look like this Figure 31 GSM900 RF controls window ...

Страница 38: ...oscope at RX i Q signal 588mVpp DC offset 1 35V Freq 67 71kHz YES YES NO NO YES YES EGSM Check RX TX Oscilloscope Check Mjoelner Check chain OK switch at RX900 Z700 56dBm check VC1 and VC2 at Z700 Signal 0V RX TX switch Spectrum analyzer Spectrum analyzer Oscilloscope Check Check EGSM SAW filter Z602 output 65dBm NO YES NO YES NO YES SAW filter Z602 Inductor L603 L602 check signal after inductors ...

Страница 39: ...004 Nokia All Rights Reserved RH 59 60 Nokia Customer Care By measuring with an oscilloscope at RXIP or RXQP on a working GSM 900 receiver this pic ture should be seen Signal amplitude peak peak 789 mV DC offset 1 2 V Figure 33 RX900 I Q signal waveform ...

Страница 40: ...al instructions for GSM1800 RX troubleshooting Connect the phone to a PC with the module repair jig Start Phoenix and establish connection to the phone Phoenix commands RF Controls Band GSM 1800 RX Continuous mode Channel 700 AGC 8 FEG ON 46 dB The setup should now look like this Figure 34 GSM1800 RF control window ...

Страница 41: ...lloscope at RX i Q signal 588mVpp DC offset 1 35V Freq 67 71kHz YES YES NO NO YES YES EGSM Check RX TX Oscilloscope Check Mjoelner Check chain OK switch at RX1800 Z700 56dBm check VC1 and VC2 at Z700 Signal 0V RX TX switch Spectrum analyzer Spectrum analyzer Oscilloscope Check Check EGSM SAW filter Z601 output 65dBm NO YES NO YES NO YES SAW filter Z602 Inductor L603 L602 check signal after inducto...

Страница 42: ...2004 Nokia All Rights Reserved XIP or RXQP on a working GSM 1800 receiver this picture should be seen Signal amplitude peak peak 460 mV DC offset 1 2 V Figure 36 RX1800 I Q signal waveform Measurement points in the receiver Figure 37 RX measurements point for the RX TX Switch Z700 ...

Страница 43: ...004 COMPANY CONFIDENTIAL 43 Copyright 2004 Nokia All Rights Reserved RH 59 60 Nokia Customer Care Figure 38 Measurements points for the RX Filters Z601 Z602 Figure 39 RX I Q Signals baseband shielding can UEM D200 ...

Страница 44: ... ISSUE 1 09 2004 Copyright 2004 Nokia All Rights Reserved RH 59 Transmitter troubleshooting Measurement points for the transmitter Figure 40 TX measuremnet points for the PA N700 shielding can Figure 41 TX measurement point for Mjolner N600 shielding can ...

Страница 45: ...measurement equipment or to at least a 10 dB attenuator otherwise the PA may be damaged Start Phoenix Service Software and establish a connection to the phone e g FBUS Select File and Product RH 59 Select Maintenance Testing and RF Controls Band GSM 900 Active Unit TX Tx Power Level 19 Tx Data Type All 1 Your screen should look like Figure 42 GSM900 RF controls window Measure the output power of t...

Страница 47: ... be damaged Start Phoenix Service Software and establish a connection to the phone e g FBUS Phoenix commands RF Controls Band GSM 1800 RX Continuous mode Channel 700 AGC 14 FEG ON 24 dB Your screen should look like Figure 44 RF controls window Measure the output power of the phone it should be around 29 5 dBm Remember the loss in the jig around 0 7 dB Troubleshooting chart for PCN transmitter refe...

Страница 48: ...ynthesizer and as the system clock for BaseBand The 26MHz signal is divided by 2 to achieve 13MHz inside the UPP IC D400 The 26 MHz signal from the VCXO can be measured by probing R425 must be measured on the UPP side of R425 i e the end not connected to C425 The level at this point is approx 700mVpp Frequency of this oscillator is adjusted by changing the AFC register inside the Mjoelner IC This ...

Страница 49: ...ISSUE 1 09 2004 COMPANY CONFIDENTIAL 49 Copyright 2004 Nokia All Rights Reserved RH 59 60 Nokia Customer Care Troubleshooting diagram for PLL Synthesizer Figure 46 PLL Troubleshooting diagram ...

Страница 50: ...ock signal is not getting to the UPP clock input in BaseBand In this case check the following 1Turn on the phone and check 2VCXO Power supply C620 2 7V 3VCXO output R425 end not connected to C425 is 26MHz and approx 700mVpp If this is not the case check the reference crystal B600 and Mjolner N600 as well as R425 R426 C425 C426 Measurement points for the VCXO Figure 47 Figure 22 Measurement point f...

Страница 51: ...ISSUE 1 09 2004 COMPANY CONFIDENTIAL 51 Copyright 2004 Nokia All Rights Reserved RH 59 60 Nokia Customer Care Measurement points at the PLL VCO Figure 49 Measurement point for PLL ...

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