Related Manuals for Nokia NSM-4 Series
Summary of Contents for Nokia NSM-4 Series
- Page 1 PAMS Technical Documentation NSM–4 Series Transceivers Disassembly & Troubleshooting Instructions E Nokia Corporation Issue 1 01/2002...
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Page 2: Table Of Contents
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Page 3: Disassembly Of Nsm-4
NSM–4 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Disassembly of NSM–4 NSM–4 phone disassembled. E Nokia Corporation Page 3 Issue 1 01/2002... - Page 4 Step 1. Press the button on the side. Step 2. Slide the cover downwards and it will be released. Step 3. Lift the battery first from the lower end. Remove the battery. E Nokia Corporation Page 4 Issue 1 01/2002...
- Page 5 Step 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. E Nokia Corporation Page 5 Issue 1 01/2002...
- Page 6 Remove the frame screws (4 pcs). Screws are numbered according to the tightening order. NOTE: When assembling the screws, use 14 Ncm torque. A–cover can now be removed. Remove speaker if needed. E Nokia Corporation Page 6 Issue 1 01/2002...
- Page 7 PWB. Keymat module removed. 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. E Nokia Corporation Page 7 Issue 1 01/2002...
- Page 8 Press down battery connector springs using SRT–3 (Battery Connector Ex- tractor Tool). Battery connector will be released. Remove volume switch and key. Remove first the volume switch. Then remove the volume key. E Nokia Corporation Page 8 Issue 1 01/2002...
- Page 9 NSM–4 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Parts separated from the main frame. NSM–4 phone disassembled. E Nokia Corporation Page 9 Issue 1 01/2002...
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Page 10: Transceiver Troubleshooting
J240 MCURDX MCU READ MAD (D200) –> COMBO MEMORY (D210) J241 MCUWRX MCU WRITE MAD (D200) –> COMBO MEMORY (D210) J242 MCUAD1 MCU ADDRESS LINE 1 MAD (D200) –> COMBO MEMORY (D210) E Nokia Corporation Page 10 Issue 1 01/2002... - Page 11 BUZZER CONTROL PWM MAD (D200) –> UI–SWITCH (N310) N310 PIN 6 BUZZER_CTRL BUZZER DRIVE UI–SWITCH (N310) –> BUZZER (B301) N310 PIN 7 KBLIGHTS KEYPAD AND DISPLAY BACKLIGHT CON- TROL MAD (D200) –> UI–SWITCH (N310) E Nokia Corporation Page 11 Issue 1 01/2002...
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Page 12: Testing
Another reference point is created by assuming that while the input voltage is zero, A/D reading is also zero. Now the slope is known and A/D readings can be calibrated. Calibration is included in VBATT A/D reading task. E Nokia Corporation Page 12 Issue 1 01/2002... -
Page 13: Troubleshooting
– there are no mechanical damages – solder joints are OK Before changing anything ALL SUPPLY VOLTAGES AND SYSTEM CLOCK / SLEEP CLOCK should be checked. Clock signal 26MHz VCXO buffer G830 V800++ 13MHz HAGAR N505 C213 E Nokia Corporation Page 13 Issue 1 01/2002... -
Page 14: System Clock
Check the signal from the RF side Change the Hagar oskilator VCXO G830 output from N505 C833. There should be 26MHz signal. IF THERE ISN’T Change the VCXO G830 System clock picture. E Nokia Corporation Page 14 Issue 1 01/2002... -
Page 15: Sleep Clock
Layout picture B signal Clk 32kHz, should be like in SLEEP CLOCK picture. IF NOT Check R100, R154, R102, C102, C101, C113 and B100 IF OK Change the CCONT N100 Sleep clock picture. E Nokia Corporation Page 15 Issue 1 01/2002... -
Page 16: Power Supplies
NSM–4 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Power Supplies Measure power supplies. Test points are shown in layout picture A. E Nokia Corporation Page 16 Issue 1 01/2002... - Page 17 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) E Nokia Corporation Page 17 Issue 1 01/2002...
- Page 18 NSM–4 PAMS Technical Documentation Disassembly & Troubleshooting Instructions E Nokia Corporation Page 18 Issue 1 01/2002...
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Page 19: Phone Is Totally Dead
“contact service” text is shown on display. MCU self tests are devided to those executed while power up (start up tests) and ones that can be executed with connected PC. The tests and included items are as follows: E Nokia Corporation Page 19 Issue 1 01/2002... - Page 20 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 checksum K. PPM validity E Nokia Corporation Page 20 Issue 1 01/2002...
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Page 21: Sim Related Faults
) IF NOT OK Check the Vsrm (C131 RF side head) Change the CCONT N100 V5V (C108 bottom connector side head) IF NOT OK Check the regulator N600, V116, C132 and C131 E Nokia Corporation Page 21 Issue 1 01/2002... -
Page 22: Audio Faults
Check the voltage in resistor Check R266, C268, L287 and V250 R267 RF side head. Voltage should be about 2.1V Check the R268,C 274,C263,C278 Change the COBBA N250 and C262 E Nokia Corporation Page 22 Issue 1 01/2002... - Page 23 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 Change the COBBA N250 E Nokia Corporation Page 23 Issue 1 01/2002...
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Page 24: Charging Fault
Charging fault Display ” not charging” Check charge voltage with wintesla Check F101, V100,R104 and R103 Check charge current with wintesla IF NOT OK Check V101 and R131 Change the Chaps N101 E Nokia Corporation Page 24 Issue 1 01/2002... -
Page 25: Rf Troubleshooting
GSM RX PCNRX N702 Poweramplifier 13MHz VTXGSM Z670 Antenna switch PCNRX Z620 FirstRX SAW VTXPON RX IN Z600 Second RX SAW TX OUT G830 VCTCXO (26MHz) N505 Hagar RF IC 26MHz GSM RX G800 VCO (3.6GHz) Z700 GSMTX SAW TXQP/N Vlna T600 GSMRX Balun... - Page 26 NSM–4 PAMS Technical Documentation Disassembly & Troubleshooting Instructions This page intentionally left blank. E Nokia Corporation Page 26 Issue 1 01/2002...