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Nokia NSM-4 Series, Disassembly & Troubleshooting Instructions, Page: 17 / 26

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Nokia NSM-4 Series Disassembly & Troubleshooting Instructions Download Page 17

NSM–4

Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Page  17

Issue 1  01/2002

 Nokia Corporation

Vbb

 = 2.7V – 2.87V

Vcore

 = 1.3V – 2.65V

Vcobba

 = 2,67V – 2.85V

Vref

 = 1.48V – 1.523V

Vbat

 = 3.11V – 4.2V

VXO

 = 2,67V – 2.85V

VRX

 = 2,67V – 2.85V

VTX

 = 2,67V – 2.85V

Vsyn1

 = 2,67V – 2.85V

Vsyn2

 = 2,67V – 2.85V

Power up sequence test:

Cconts digital parts keep MAD in reset by keeping PURX down for a
delay of 62ms.

Here is shown the start up sequence picture.

Ch1 = Vbb
Ch2 = VXO
Ch3 = SleepClk
Ch4 = PURX (see picture B)

Summary of Contents for NSM-4 Series

Page 1: ...PAMS Technical Documentation NSM 4 Series Transceivers Issue 1 01 2002 Nokia Corporation Disassembly Troubleshooting Instructions ...

Page 2: ...r Troubleshooting 10 Baseband Troubleshooting 10 PWB Test Points 10 Testing 12 Troubleshooting 13 System Clock 14 Sleep Clock 15 Power Supplies 16 Phone is totally dead 19 Flash programming fails 19 Power doesn t stay on or phone is jammed 19 Contact Service on the phone display 19 SIM related faults 21 Audio faults 22 Charging fault 24 RF Troubleshooting 25 ...

Page 3: ...NSM 4 Disassembly Troubleshooting Instructions PAMS Technical Documentation Page 3 Issue 1 01 2002 Nokia Corporation Disassembly of NSM 4 NSM 4 phone disassembled ...

Page 4: ...MS Technical Documentation Page 4 Issue 1 01 2002 Nokia Corporation Remove battery Step 3 Lift the battery first from the lower end Remove the battery Step 1 Press the button on the side 1 1 Step 2 Slide the cover downwards and it will be released 2 3 ...

Page 5: ...ue 1 01 2002 Nokia Corporation Remove the SIM card from its location Step 1 Open the slide cover Remove the slide cover Step 2 Push the slide edge outwards NOTE Use only numbered side 2 to release the slide Step 3 Lift the slide up simultaneously and the slide will be released 1 2 3 2 3 ...

Page 6: ... SRT 3 Battery Connector Extrac tor Tool forward to release the snaps and lift up the antenna NOTE Be careful not brake the middle frame Remove the antenna 4 5 Remove the A cover Remove the frame screws 4 pcs Screws are numbered according to the tightening order NOTE When assembling the screws use 14 Ncm torque 1 1 2 3 4 A cover can now be removed Remove speaker if needed ...

Page 7: ...hen assembling the screws use 17 Ncm torque Keymat module removed Push SW slide switch before removing the keymat module Now remove the keymat module NOTE Be careful not to damage the slide switch on the PWB Remove PWB and display Push from the side to release the PWB To remove the display release the snap fix ings in the display module Remove the keymat module ...

Page 8: ...ng parts can be separated from the main frame bottom connector SIM connector vibra metal gasket 8 Remove battery connector Turn the phone around Press down battery connector springs using SRT 3 Battery Connector Ex tractor Tool Battery connector will be released 9 Remove first the volume switch Then remove the volume key Remove volume switch and key ...

Page 9: ...NSM 4 Disassembly Troubleshooting Instructions PAMS Technical Documentation Page 9 Issue 1 01 2002 Nokia Corporation 10 Parts separated from the main frame NSM 4 phone disassembled ...

Page 10: ... SERIAL BUS 9600 BIT S MAD D200 SERVICE INTERFACE J104 CCONT CSX CCONT N100 CHIP SELECT MAD D200 CCONT N100 J223 CCONT INT CCONT N100 INTERRUPT MAD D200 CCONT N100 J226 VCXOPWR 26MHz SYSTEM CLOCK CONTROL MAD D200 VCXO G830 J227 PURX POWER UP RESET CCONT N100 MAD D200 J228 SLEEPCLK SLEEP CLOCK 32kHz CCONT N100 MAD D200 J230 GND GROUND J234 HAGAR _RESET_X HAGAR N505 RESET MAD D200 HAGAR N505 J235 RO...

Page 11: ...SMITTED DATA MAD D200 COBBA N250 J257 CCUT MCUGE NIO0 CHARGE CUT MAD D200 CHAPS N101 J258 BUTTON_CTRL MCUGENIO1 HEADSET BUTTON DETECTION CON TROL MAD D200 XMICP J259 MCUGENIO2 NOT CONNECTED J260 EXTMCUDA0 MCU DATA LINE 0 MAD D200 COMPOMEMORY D210 J299 TXP TRANSMITTER POWER CONTROL MAD D200 RF L200 MIC MIC BIAS VOLTAGE 2 1V IF NO MIC V250 MIC N310 PIN 13 KBD LIGHT KEYPAD LED LIGHT CURRENT UI SWITCH...

Page 12: ...OTE Baseband doesn t wake up automatically when the battery voltage is connected Power must be switched on by pressing the Power key or inserting a waking pulse BTEMP line or connecting a charger In the local mode the baseband can be controlled through MBUS or FBUS connections by a PC locals software Baseband internal connec tions are tested with selftests if possible Parameters cannot be set accu...

Page 13: ...k fix the power supplies Contact service case How to check fix the SIM faults How to check fix the Audio faults How to check fix the charger faults The first thing to do is to carry out a thorough visual check of the module Make sure that there are no mechanical damages solder joints are OK Before changing anything ALL SUPPLY VOLTAGES AND SYSTEM CLOCK SLEEP CLOCK should be checked 26MHz VCXO G830 ...

Page 14: ...re B signal RFC should be like in SYSTEM Check the signal from the RF side buffer input C829 If there is signal check the R829 R834 R830 V800 C834 and L800 IF NOT Check the signal from the RF side oskilator VCXO G830 output from C833 There should be 26MHz signal IF THERE ISN T Change the Hagar N505 IF IS Change the VCXO G830 IF THERE ISN T CLOCK picture System clock picture ...

Page 15: ...umentation Page 15 Issue 1 01 2002 Nokia Corporation Sleep Clock Check the signal from the J228 Layout picture B signal Clk 32kHz should be like in SLEEP CLOCK IF NOT IF OK Change the CCONT N100 Check R100 R154 R102 C102 C101 C113 and B100 picture Sleep clock picture ...

Page 16: ...NSM 4 Disassembly Troubleshooting Instructions PAMS Technical Documentation Page 16 Issue 1 01 2002 Nokia Corporation Power Supplies Measure power supplies Test points are shown in layout picture A A ...

Page 17: ...V 2 65V Vcobba 2 67V 2 85V Vref 1 48V 1 523V Vbat 3 11V 4 2V VXO 2 67V 2 85V VRX 2 67V 2 85V VTX 2 67V 2 85V Vsyn1 2 67V 2 85V Vsyn2 2 67V 2 85V Power up sequence test Cconts digital parts keep MAD in reset by keeping PURX down for a delay of 62ms Here is shown the start up sequence picture Ch1 Vbb Ch2 VXO Ch3 SleepClk Ch4 PURX see picture B ...

Page 18: ...NSM 4 Disassembly Troubleshooting Instructions PAMS Technical Documentation Page 18 Issue 1 01 2002 Nokia Corporation B ...

Page 19: ...Serial data line failure External RAM fault Algorithm file or alias ID not found MCU flash Vpp error Power doesn t stay on or phone is jammed If this kind of fault has come after flash programming there are most probably open joints in ICs Solder the joints of ICs Normally the power will be switched off by CCONT N100 after 30 seconds if the watchdog of the CCONT can not be served by software This ...

Page 20: ...h Items being checked are MAD2 Flash data and address lines CE0 CE1 WE BYTE Vcc GND Flash internal functionality 2 MCU RAM interface 3 MCU RAM component 4 MCU EEPROM interface 5 MCU EEPROM component 6 RTC battery 7 CCONT interface 8 A D converter 9 SW reset A Power off B Security data C EEPROM tune checksum D PPM checksum E MCU download DSP F DSP alive G COBBA serial H COBBA parallel I EEPROM chec...

Page 21: ...t SIM card faults can be found without SIM card The fault information Card rejected indicates that ATR message the first message is always sent from card to the phone is sent from card but the message is somehow corrupted data signal levels are wrong etc or fac tory set values stored to the emulated EEPROM are not correct IF NOT OK IF NOT OK Check the Vsim Is it 3V or 5V Vsim C128 bottom connector...

Page 22: ...esn t work and there isn t any mechanical problem Check C 292 C291 L272 and L271 OK Change the COBBA N250 Microphone doesn t work and there isn t any mechanical problem Check the voltage in resistor R267 RF side head Voltage should be about 2 1V Check the R268 C 274 C263 C278 and C262 Check R266 C268 L287 and V250 OK OK Change the COBBA N250 ...

Page 23: ...eadset earpiece doesn t work and there isn t any mechanical problem Check R 257 R256 R270 L284 L283 C284 C283 C 296 C 297 C261and C255 OK Change the COBBA N250 Headset earphone doesn t work and there isn t any mechanical problem Check R 257 R256 R270 L284 L283 C284 C283 C 296 C 297 C261and C255 OK Change the COBBA N250 ...

Page 24: ...hnical Documentation Page 24 Issue 1 01 2002 Nokia Corporation Charging fault Change the Chaps N101 Display not charging Check charge voltage with wintesla Check charge current with wintesla Check F101 V100 R104 and R103 OK OK Check V101 and R131 IF NOT OK ...

Page 25: ... GSMTX SAW T600 GSMRX Balun T630 PCN RX Balun T740 PCN TX Balun T700 GSMTX Balun T800 VCO Balun 3 6GHz V903 PCN LNA V904 GSMLNA L553 Dual coupler V730 Powerdetector V800 VCTCXO Buffer N600 Vcp regulator 13MHz TXC Vtcxo Vchp GSM RX PCNRX GSM RX PCNRX Vsynte Vrxrf Vlna Vref_2 Hagar_reset RXREF TXP Vapc TXBUFF 26MHz AFC TXIP N TXQP N GSM TX PCNTX PCN GSM TX IN VBATT GSM TX OUT VTXGSM VTXPCN PCNTX OUT...

Page 26: ...NSM 4 Disassembly Troubleshooting Instructions PAMS Technical Documentation Page 26 Issue 1 01 2002 Nokia Corporation This page intentionally left blank ...

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