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 Mobile Phones Ltd. Page 4 Issue 1 06/2000...
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NOTE: When assembling the Remove A–cover, speaker screws, use 15 and power button. Ncm torque. Remove keymat module screws (2 pcs). NOTE: When assembling the screws, use 17 Ncm torque. E Nokia Mobile Phones Ltd. Page 5 Issue 1 06/2000...
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SW/slide switch on the PCB. Parts can be separated: – lcd module – PCB – buzzer rubber – metal gasket – bottom connector – SIM connector – Twin Rip – vibra E Nokia Mobile Phones Ltd. Page 6 Issue 1 06/2000...
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Remove the volume key 2. Turn the phone around. Press down battery conector springs Release the latch snap. using Battery Connector Extractor Tool. Remove the latch and latch spring. Battery connector will be released. E Nokia Mobile Phones Ltd. Page 7 Issue 1 06/2000...
NSB–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions PCB Test Point Pictures C213, RFC in normal operation J227, PURX (levels) E Nokia Mobile Phones Ltd. Page 11 Issue 1 06/2000...
NSB–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions L200, MIC, no mic connected N310 PIN 19, Vibra, activated from keypad E Nokia Mobile Phones Ltd. Page 20 Issue 1 06/2000...
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 Mobile Phones Ltd. Page 22 Issue 1 06/2000...
– 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 Mobile Phones Ltd. Page 23 Issue 1 06/2000...
Check the signal from the RF side Change the Hagar oskilator VCXO G830 output fron N505 C833. There should be 26MHz signal. IF THERE ISN’T Change the VCXO G830 System clock picture. E Nokia Mobile Phones Ltd. Page 24 Issue 1 06/2000...
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 Mobile Phones Ltd. Page 25 Issue 1 06/2000...
PAMS Technical Documentation Disassembly & Troubleshooting Instructions Power Supplies Measure power supplies. Test points are shown in layout picture A. Layout example shown here is NSM–2. Vbat Vcore Vsyn2 Vsyn1 Vcobba Vref E Nokia Mobile Phones Ltd. Page 26 Issue 1 06/2000...
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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 Mobile Phones Ltd. Page 27 Issue 1 06/2000...
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 Mobile Phones Ltd. Page 29 Issue 1 06/2000...
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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 Mobile Phones Ltd. Page 30 Issue 1 06/2000...
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 Mobile Phones Ltd. Page 31 Issue 1 06/2000...
Check the voltage in resistor Check R266, C268, L200 and V250 R267 RF side head. Voltage should be about 2.1V Check the R268, C263, C276 Change the COBBA N250 and C262 E Nokia Mobile Phones Ltd. Page 32 Issue 1 06/2000...
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Change the COBBA N250 Headset earphone doesn’t work and there isn’t any mechanical problem Check R 257,R256, R270, L303, L304, C303, C304, C296, C297, R218 and R219 Change the COBBA N250 E Nokia Mobile Phones Ltd. Page 33 Issue 1 06/2000...
Display ” not charging” Check charge voltage with wintesla Check F101, V100,R104 and R103 Check charge current calibration with WinTesla IF NOT OK Check V101 and R131 Change the Chaps N101 E Nokia Mobile Phones Ltd. Page 34 Issue 1 06/2000...
(32,5 dBm, EGSM / lev 5) (29,5 dBm, EGSM / lev 0) (check level from reference engine) TX14 PA output GSM C758 PA output signal TX20 PA output DCS C743 (check level from reference engine) E Nokia Mobile Phones Ltd. Page 35 Issue 1 06/2000...
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VXO3 26 MHz G830 / C833 Clock signal from VCTCXO to Hagar VXO4 13 MHz V800 / R834 RFC from Hagar to MAD Other checking points SCLK R205 SENA R206 SDATA J237 E Nokia Mobile Phones Ltd. Page 36 Issue 1 06/2000...
Channel 3: RX3 LNA_G V907 Note the premonitoring steps at the beginning of the burst. Picture 2. RX I/Q before AGC Pin = –50dBm, Fin = 947,06771MHz Channel 1: RX2 C522 E Nokia Mobile Phones Ltd. Page 37 Issue 1 06/2000...
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NSB–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions This page intentionally left blank. E Nokia Mobile Phones Ltd. Page 42 Issue 1 06/2000...