Nokia NSM-2 Series Disassembly & Troubleshooting Instructions Download Page 10 | Manualshive

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NSM–2
Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Page 10

Issue 1 12/1999

Nokia Mobile Phones Ltd.

Troubleshooting

Troubleshooting instructions are divided into following sections:

How to check/fix the system/sleep clock.
How to check/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

HAGAR
N505

Clock signal
buffer
V800++

MAD
C213

/2

13MHz

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Summary of Contents for NSM-2 Series

Page 1: ...PAMS Technical Documentation NSM 2 Series Transceivers Issue 1 12 1999 Nokia Mobile Phones Ltd Disassembly Troubleshooting Instructions ...

Page 2: ...ceiver Troubleshooting 7 Baseband Troubleshooting 7 PCB Test Points 7 Testing 9 Troubleshooting 10 System Clock 11 Sleep Clock 12 Power Supplies 13 Phone is totally dead 16 Flash programming fails 16 Power doesn t stay on or phone is jammed 16 Contact Service on the phone display 16 SIM related faults 18 Audio faults 19 Charging fault 21 RF Troubleshooting 22 ...

Page 3: ...tep 1 Open 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 Step 3 Lift the battery first from the lower end Step 4 Remove the battery Step 1 Press the button on the side Step 2 Slide the cover downwards and the cover will be released Remove the slide cover 1 2 3 4 1 2 1 2 3...

Page 4: ... 3 Battery Connector Extractor Tool forward to release the snaps Step 2 Release snap fixing using screw driver Step 3 Lift up the antenna NOTE Models with no hole in the frame push firmly the antenna 1 arrow direction to release the snaps Use screw driver to release snap fixing 2 arrow Lift up the antenna 3 arrow NOTE Be careful not brake the middle frame Remove A cover speaker and power button NO...

Page 5: ...1999 Nokia Mobile Phones Ltd Parts can be separated lcd module PCB buzzer rubber metal gasket bottom connector SIM connector vibra Push SW slide switch before removing the keymat module Now remove the keymat module and rtc battery NOTE Be careful not to damage the SW slide switch on the PCB 9 10 ...

Page 6: ...sue 1 12 1999 Nokia Mobile Phones Ltd Turn the phone around Press down battery conector springs using Battery Connector Extractor Tool Battery connector will be released Remove the volume switch 1 Remove the volume key 2 12 11 13 Release the latch snap Remove the latch and latch spring ...

Page 7: ...ON 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 ...

Page 8: ...ANSMITTED 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 SWIT...

Page 9: ... NOTE 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 ac...

Page 10: ...heck 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 G8...

Page 11: ...cture 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 fron 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 12: ...ntation Page 12 Issue 1 12 1999 Nokia Mobile Phones Ltd 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 13: ...ooting Instructions PAMS Technical Documentation Page 13 Issue 1 12 1999 Nokia Mobile Phones Ltd Power Supplies Measure power supplies Test points are shown in layout picture A VXO Vref Vcobba VRX VTX Vsyn1 Vsyn2 Vcore Vbb Vbat A ...

Page 14: ...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 ...

Page 15: ...embly Troubleshooting Instructions PAMS Technical Documentation Page 15 Issue 1 12 1999 Nokia Mobile Phones Ltd Xf CLK 32 kHz PURX Ccont int VXO Pwr ESysResetX RFC ROM1SelX MCURdX MCUWrX MCUAd1 B MBUS FBUSRx FBUSTx ...

Page 16: ...re 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 Th...

Page 17: ...lash 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 c...

Page 18: ...sert 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 connec...

Page 19: ... doesn t work and there isn t any mechanical problem Check R 292 R291 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 20: ...d Headset 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 21: ...cal Documentation Page 21 Issue 1 12 1999 Nokia Mobile Phones Ltd 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 22: ...X I Q ADC RXQ filt RXI filt Vsynte Vlna Vmod Vrxrf Vcobba 1 5V Vtcxo RX_GSM balun_in RX_PCN balun_in TCXO 26 MHz TCXO 2 13 MHz RX_PCN lna_in RX_GSM lna_in ant_sw_ctrl GSM ant_sw_ctrl PCN ant_sw_IN PA_PCN_out PA_GSM_out PA_in PA_ctrl GSM PA_ctrl PCN PA_buff_in TX_balout PCN TX_balout GSM Vchp VCO_out VCO_ctrl 1 2V RX 1 35V RX TXC TXI TXQ AFC 5V5 ...

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