PAMS Technical Documentation NSB–6 Series Transceivers Disassembly & Troubleshooting Instructions Issue 1 06/2000 E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation CONTENTS Disassembly of NSB–6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Transceiver Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Baseband Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . PCB Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PCB Test Point Pictures . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions Picture 3. LNA control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Picture 4. PA selection and control . . . . . . . . . . . . . . . . . . . Picture 5. VBATT during TX burst . . . . . . . . . . . . . . . . . . . . Picture 6. Switch control . . . . . . . . . . . . . . . . . . . . . . . . . . . . Picture 7. Power detector control . . . . . . . . . . . . . . . . . . . . . Picture 8. TX IQ signals . . . . . . . . . .
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Disassembly of NSB–6 Remove battery. Step 1. Press the button on the side. Step 2. Slide the cover downwards and the cover will be released. 1. 2. Step 3. Lift the battery first from the lower end. Step 4. Remove the battery. 2. 1. Remove the SIM card from its location. 3. 4. Remove the slide cover. 1. Step 1. Open the slide cover. Step 2. Push the slide edge outwards.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Remove the antenna. 5. NOTE: Pull out the whip antenna first. Step 1. To remove the antenna, push with the thin spike of SRT–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: Be careful not brake the middle frame. 6. 7. Remove the frame screws (4 pcs). Screws are numbered according to the tightening order.
NSB–6 Disassembly & Troubleshooting Instructions 9. PAMS Technical Documentation 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. 10. Parts can be separated: – lcd module – PCB – buzzer rubber – metal gasket – bottom connector – SIM connector – Twin Rip – vibra Page 6 E Nokia Mobile Phones Ltd.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions Remove the volume switch 1. Remove the volume key 2. 11. 12. 13. Turn the phone around. Press down battery conector springs using Battery Connector Extractor Tool. Battery connector will be released. Issue 1 06/2000 Release the latch snap. Remove the latch and latch spring. E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Transceiver Troubleshooting Baseband Troubleshooting Because of the underfilling of the MAD and combo memory, it is impossible to change those.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Reference Signal J241 MCUWRX MCU WRITE MAD (D200) –> COMBO MEMORY (D210) J242 MCUAD1 MCU ADDRESS LINE 1 MAD (D200) –> COMBO MEMORY (D210) J245* R205# SCLK HAGAR (N505) SERIAL CLOCK MAD (D200) –> HAGAR (N505) J250 COBBA CSX COBBA (N250) CHIP SELECT MAD (D200) –> COBBA (N250) J251 COBBA SDA COBBA (N250) SERIAL BUS DATA MAD (D200) <–> COBBA (N250) J252 COBBA CLK COBBA (N250) SERIAL BUS CLOCK MAD (D200) –> COBBA (N
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Reference Signal Note N310 PIN 6 BUZZER_CTRL N310 PIN 7 KBLIGHTS N310 PIN 8 LCDLED_ADJ LCD BACKLIGHT BRIGHNESS ADJUSTMENT R310 –> UI–SWITCH (N310) N310 PIN 9 LCD LIGHT LCD LED LIGHT CURRENT UI–SWITCH (N310) –> DISPLAY BACKLIGHT LEDS N400 PIN 4 IRONX N401 PIN 4 IRDA POWER R118 PWRONX R206 SENA R211 VPP FLASH PROGRAMMING VOLTAGE N220 –> COMPOMEMORY (D210) R277 EAD ACCESSORY DETECTION XMICP –> CCONT (N100)
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions PCB Test Point Pictures C213, RFC in normal operation J227, PURX (levels) Issue 1 06/2000 E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation J228, SLEEPCLK J236, RAMSELX Page 12 E Nokia Mobile Phones Ltd.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions J237, SYNTHDATA J241, MCUWRX Issue 1 06/2000 E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation J242, MCUAD1 J245, SCLK Page 14 E Nokia Mobile Phones Ltd.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions J245, SCLK (DIFFERENT TIME SCALE IN OSCILLOSCOPE) J250, COBBA (CSX) Issue 1 06/2000 E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation J251, COBBA(SDA) J252, COBBA(CLK) Page 16 E Nokia Mobile Phones Ltd.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions J253, PCMRXDATA, WinTesla Audiotest, Loop ON, Input and Output Internal J254, PCMDCLK Issue 1 06/2000 E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation J255, PCMSCLK J256, PCMTXDATA, WinTesla Audiotest, Loop ON, Input and Output Internal Page 18 E Nokia Mobile Phones Ltd.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions J260, EXTMCUDA0 J299, TXP, WinTesla RF Control, TX, Burst, Tx level 14, Data Type Cont Issue 1 06/2000 E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation L200, MIC, no mic connected N310 PIN 19, Vibra, activated from keypad Page 20 E Nokia Mobile Phones Ltd.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions N310 PIN 6, BUZZER_CTRL R206, SENA Issue 1 06/2000 E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation R211, VPP, WinTesla Self Test, MCU Eeprom interface Testing The MCU software enters a local mode at start–up if suitable resistors are connected to the BTEMP and BSI lines. NOTE! Baseband doesn’t wake up automatically when the battery voltage is connected.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions 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.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation System Clock Check the signal from the C213 Layout picture B signal RFC, should be like in SYSTEM CLOCK picture. IF NOT Check the signal from the RF side buffer input C829. If there is signal, check the R829,R834,R830,V800, C834 and L800 IF THERE ISN’T Check the signal from the RF side oskilator VCXO G830 output fron C833. There should be 26MHz signal.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions Sleep Clock Check the signal from the J228 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. Issue 1 06/2000 E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Power Supplies Measure power supplies. Test points are shown in layout picture A. Layout example shown here is NSM–2. A Vbat Vbb Vcore Vsyn2 Vsyn1 VTX VRX Vcobba Vref VXO Page 26 E Nokia Mobile Phones Ltd.
PAMS Technical Documentation Vbb Vcore Vcobba Vref Vbat VXO VRX VTX Vsyn1 Vsyn2 NSB–6 Disassembly & Troubleshooting Instructions = 2.7V – 2.87V = 1.3V – 2.65V = 2,67V – 2.85V = 1.48V – 1.523V = 3.11V – 4.2V = 2,67V – 2.85V = 2,67V – 2.85V = 2,67V – 2.85V = 2,67V – 2.85V = 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.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation B Xf CLK 32 kHz PURX Ccont int. VXO Pwr ESysResetX RFC MCUAd1 MCUWrX MBUS Page 28 FBUSTx FBUSRxROM1SelX MCURdX E Nokia Mobile Phones Ltd.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions Phone is totally dead The phone doesn’t take current at all when the power switch is pressed or when the watchdog disable pin (X001 pin 11) is grounded. Make sure that the battery voltage you use is within the specification, i.e. 3.11 .. 4.2 V. If the voltage is lower, hardware of CCONT (N100) prevents power on. IF battery voltage is inside the specification Change the Ccont.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation 1. MCU ROM checksum Calculates 16 bit checksum out of Flash code and compares it to one found in Flash. 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.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions SIM related faults The hardware of the SIM interface from MAD2 (D200) to the SIM connector (X302) can be tested without a SIM card. When the power is switched on and the BSI line is grounded by a resistor, all the used lines (VSIM, RST, CLK, DATA) rise up to 5 V four times. Thus “Insert SIM card” faults can be found without SIM card.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Audio faults earpiece doesn’t work and there isn’t any mechanical problem Check 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 R266, C268, L200 and V250 OK Check the R268, C263, C276 and C262 Page 32 OK E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Headset earpiece doesn’t work and there isn’t any mechanical problem Check R 257,R256, R270, L303, L304, C303, C304, C296, C297, R218 and R219 OK 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 OK Change the COBBA N250 Issue 1 06/2000 E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Charging fault Display ” not charging” Check charge voltage with wintesla Check F101, V100,R104 and R103 OK Check charge current calibration with WinTesla IF NOT OK Check V101 and R131 Page 34 OK Change the Chaps N101 E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation RF Testpoints (reference pictures at the back of the binder after schematics diagrams) RX DC levels (oscilloscope) Point RX1 Signal RXIP and RXQP Component R530 RX2 RX3 RX4 RX5 RX6 RX7 RX8 RX9 RXIP and RXQP EGSM LNA ctrl DCS LNA ctrl Rxref VREF_2 Vlna Vrxrf Vsynte C522 and C523 C611 / V907 C642 / V905 C534 / R533 C564 / R563 C562 C557 C561 Comment I/Q signals (67 kHz) from Hagar to COBBA.
NSB–6 Disassembly & Troubleshooting Instructions TX13 TX21 TX15 TX17 TX22 Antsw input GSM Antsw input DCS PA input DCS PA input EGSM PWR detector input Z670, TX1 GSM Z670, TX2 DCS C 734 C710/C751 V730 input TX23 EGSM SAW input Z700 / C701 *) Not measureable if PA shield is on.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions Pictures from RF measurement points Picture 1. RX I/Q from Hagar to baseband Pin = –58dBm, Fin = 947,06771MHz (RSSI Reading ≈ –60dBm) Channel 1: RX1 RXIP R530 Channel 2: RX1 RXQP R530 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 Issue 1 06/2000 E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Picture 3. LNA control Channel 2: Channel 3: (Channel 4: RX3, base of V907, (equals RX4, base of V905 in upperband mode) RX7: Vlna, RX4 base of V905) Picture 4.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions Picture 5. VBATT during TX burst Condition: EGSM TX, burst mode powerlevel 5 Channel 2: VCO1 , c (VCO) C805 Channel 3: VCO4, Vc (VCO) C803 Channel 1: TX2, VBATT Picture 6. Switch control Channel 1: Channel 2: (Channel 4: Issue 1 06/2000 TX3: TXP, J519, TX10: C746, TXVGSM (equals TX16: C747, TXVDCS in upperband mode) TX16: C747, TXVDCS) E Nokia Mobile Phones Ltd.
NSB–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Picture 7. Power detector control Condition: Channel 4: Channel 3: Channel 2: Channel 1: EGSM TX, burst mode powerlevel 10 TX11: C790, DET0, TX7: C761, DET0, TX6: R754, TXVDET, TX3: TXP, J519, Picture 8. TX IQ signals Channel 1: TX8 TXQN Channel 2: TX9 TXIN (TX burst mode Cont1) Page 40 E Nokia Mobile Phones Ltd.
PAMS Technical Documentation NSB–6 Disassembly & Troubleshooting Instructions Picture 9. VCO, operating voltages Conditions: Channel 1: Channel 2: Channel 3: Channel 4: DCS RX in burst mode, RX ch810, Monitoring ch512 VCO4 C803,Vc VCO1 C805, Vcc VCO3 N600, Vin VCO2 C782, Vchp Picture 10. Clock signals, VCTCXO, RFC Channel 1: VXO3 L800, RFC Channel 2: VXO4 R833, VCTCXO_out Issue 1 06/2000 E Nokia Mobile Phones Ltd.
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