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Nokia NSW-6 Series Disassembly & Troubleshooting Instructions
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Nokia NSW-6 Series Disassembly & Troubleshooting Instructions

Nokia NSW-6 Series Disassembly & Troubleshooting Instructions

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PAMS Technical Documentation
NSW-6 Series Transceivers
Disassembly &
Troubleshooting
E Nokia Mobile Phones Ltd.
Issue 1 12/99

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  • Page 1 PAMS Technical Documentation NSW-6 Series Transceivers Disassembly & Troubleshooting E Nokia Mobile Phones Ltd. Issue 1 12/99...
  • Page 2 NSW-6 PAMS Technical Documentation Disassembly & Troubleshooting AMENDMENT RECORD SHEET Amendment Date Inserted By Comments Number 12/99 OJuntune New disassembly E Nokia Mobile Phones Ltd. Page 2 Issue 1 12/99...

  • Page 3: Table Of Contents

    ..... . Power Amplifiers N903 & N960 ..... . E Nokia Mobile Phones Ltd. Page 3 Issue 1 12/99...
  • Page 4 ........E Nokia Mobile Phones Ltd.

  • Page 5: Disassembly

    3.Remove slide: open it halfway down, and with the left side first, remove it by flipping it over its axle. E Nokia Mobile Phones Ltd. Page 5 Issue 1 12/99...
  • Page 6 NSW-6 PAMS Technical Documentation Disassembly & Troubleshooting 4.Remove A–cover screws (2 pcs) 5. Turn the phone over and remove C–cover screws (3 pcs) E Nokia Mobile Phones Ltd. Page 6 Issue 1 12/99...
  • Page 7 NSW-6 PAMS Technical Documentation Disassembly & Troubleshooting Snap Snap 6.Release C–cover snaps 7. Open covers E Nokia Mobile Phones Ltd. Page 7 Issue 1 12/99...
  • Page 8 NSW-6 PAMS Technical Documentation Disassembly & Troubleshooting 8. Remove shield screws (2 pcs) 9. Remove shield E Nokia Mobile Phones Ltd. Page 8 Issue 1 12/99...
  • Page 9 NSW-6 PAMS Technical Documentation Disassembly & Troubleshooting 10. Remove main PCB 11. Remove slide frame, UI PCB follows E Nokia Mobile Phones Ltd. Page 9 Issue 1 12/99...
  • Page 10 NSW-6 PAMS Technical Documentation Disassembly & Troubleshooting 12. Now parts can be separated from the cover. E Nokia Mobile Phones Ltd. Page 10 Issue 1 12/99...

  • Page 11: Baseband Testing

    Test jig in production line must have a connection to bat- tery terminals. ICHAR is adjusted to 500 mA and VCHAR to 8.4 V with appropriate load connected to the battery terminals. E Nokia Mobile Phones Ltd. Page 11 Issue 1 12/99...

  • Page 12: Trouble Shooting

    The first thing to do is carry out a through visual check of the module. En- sure in particular that: a) there are not any mechanical damages b) soldered joints are OK E Nokia Mobile Phones Ltd. Page 12 Issue 1 12/99...

  • Page 13: Phone Is Totally Dead

    PWR switch pressed or or watchdog disable pin Check watchdog disable watchdog disable pin (X101 pin 11) grounded line X101 grounded See section: Power does not Faulty circuit N160 stay on E Nokia Mobile Phones Ltd. Page 13 Issue 1 12/99...

  • Page 14: Flash Programming Doesn't Work

    MCURDX and MCUWRX (X200 pins 19 and 18) There could be open pins in circuits D200, D201, D202 (open joints may be detectable with microscope). If not the PCB or D202, D200, D201, N150 is faulty E Nokia Mobile Phones Ltd. Page 14 Issue 1 12/99...

  • Page 15: Power Doesn't Stay On Or The Phone Is Jammed

    RFC (J255) 19.44 MHz sine wave Check VCXO G850 Clock signal: 700 mV Vpp typ. COBBACLK (J210) 9.72 MHz square wave clock signal 2.80 Vpp Open pins or faulty circuit: D202, D200, D201, N150 E Nokia Mobile Phones Ltd. Page 15 Issue 1 12/99...

  • Page 16: The Phone Doesn't Register To The Network Or Phone Doesn't Make A Call

    The control lines for RF part are supplied both the System Asic (MAD D202) and the RFI (Cobba N250). MAD handles digital control lines and Cobba handles analog control lines. Diagram is on the next page. E Nokia Mobile Phones Ltd. Page 16 Issue 1 12/99...
  • Page 17 Analog data signals : TXIN 0–>0.8V DC during transmit slot N250 TXIP 0–>0.8V DC during transmit slot TXQN 0–>0.8V DC during transmit slot TXQP 0–>0.8V DC during transmit slot Check RF–part Used max, frequency is 12 kHz max E Nokia Mobile Phones Ltd. Page 17 Issue 1 12/99...

  • Page 18: Charging Failure

    1 Hz square wave frequency if N150 ACP–7U or ACP–8 is connected Check Voltage levels at R153 are same as VBAT (C180) R153, N151 Voltage levels at R153 rises when Faulty charger is connected N151 E Nokia Mobile Phones Ltd. Page 18 Issue 1 12/99...

  • Page 19: Rf Troubleshooting

    PCB. AAX-1 tool is used to provide galvanic contact for RF measurements, kindly refer to the figure on the next page. E Nokia Mobile Phones Ltd. Page 19 Issue 1 12/99...

  • Page 20: Abbreviations Used

    Printed Circuit Board Phase Locked Loop Radio Frequency Receiver Time (between pulses) Transmitter Ultra High Frequency Voltage of signal (measured with oscilloscope) Voltage controlled oscillator Very High Frequency Audio Frequency E Nokia Mobile Phones Ltd. Page 20 Issue 1 12/99...

  • Page 21: Interface Signals Between Rf And Bb/Dsp

    Logic high ”1” 2.85 1 Ghz PLL en- able Logic low ”0” SDATA EROTUS Logic high ”1” 2.85 Synthesizer data Logic low ”0” SCLK EROTUS Logic high ”1” 2.85 Synthesizer clock E Nokia Mobile Phones Ltd. Page 21 Issue 1 12/99...
  • Page 22 TUS register TXP2 PENTA Logic high ”1” 2 Ghz Transmit- regulator ter enable Logic low ”0” VR11 ON/OFF EROTUS Logic high ”1” PWR control loop during TX burst (slow mode) E Nokia Mobile Phones Ltd. Page 22 Issue 1 12/99...
  • Page 23 Logic high ”1” VR10 ON , 2Ghz BA_D Logic low ”0” VR10 OFF TXPWR1 CCont Logic high ”1” VR5 ON , TX pwr control en- able Logic low ”0” VR5 OFF E Nokia Mobile Phones Ltd. Page 23 Issue 1 12/99...
  • Page 24 TX800 PA bias and driver ampli- fier supply volt- VR7_bias CCont Voltage 2.85 TX800 PA bias switching voltage ”0”=AMPS ”1”=TDMA CCont EROTUS Voltage Erotus and 2 Ghz PLL charge- pump E Nokia Mobile Phones Ltd. Page 24 Issue 1 12/99...

  • Page 25: Receiver

    Diplexer Duplexer Low Noise Amplifier (LNA) RX filter First mixer 116.19 MHz filter IF–amplifier AGC/buffer second mixer 450 kHz filters buffer/limiter Baseband( FM–detector). AMPS RX Diagram on the next page. E Nokia Mobile Phones Ltd. Page 25 Issue 1 12/99...
  • Page 26 Check MXR IF level, Check LO input level at Start synthesizer N701, pin1 P ≅ 0dBm F= 116.19 MHz troubleshooting P:≅–50dBm f=995.19 MHz Note! Change N701 Check all components around N701 E Nokia Mobile Phones Ltd. Page 26 Issue 1 12/99...

  • Page 27: Tdma800Rx

    180 deg rotation will hurt SINAD! So, input at R774 R789, L750, C780 and check placement from OK phone, or R774 try to rotate. AMPS TX continued above TDMA800RX Diagram on the next page. E Nokia Mobile Phones Ltd. Page 27 Issue 1 12/99...
  • Page 28 Z701 Check MXR IF level, Check LO input level Start synthesizer F= 116.19 MHz of of N701, pin1 troubleshooting pin14, f=995.19 MHz Note! Change N701 Check all components around N701 E Nokia Mobile Phones Ltd. Page 28 Issue 1 12/99...
  • Page 29 Check OUTP_rxif level Change capacitors at R798 C750 & C751 Check all discrete components and supply voltages of EROTUS. Check also AGC1 line. Change EROTUS Check COBBA_D & start BB troubleshooting E Nokia Mobile Phones Ltd. Page 29 Issue 1 12/99...

  • Page 30: Tdma 1900Rx

    P: ≅ –55dBm Check MXR IF level, F= 116.19 MHz, Check input level of Start synthesizer pin14 frontend N721, pin1 troubleshooting F=2076.21 MHz Note! Change N721 Check all components around of N721 E Nokia Mobile Phones Ltd. Page 30 Issue 1 12/99...
  • Page 31 Check OUTP_rxif level Change capacitors at R798 C750 & C751 Check all discrete components and supply voltages of EROTUS. Check also AGC1 line. Change EROTUS Check COBBA_D & start BB troubleshooting E Nokia Mobile Phones Ltd. Page 31 Issue 1 12/99...

  • Page 32: Transmitter

    Set Ref LVL 30 dB Set Ref LVL offset and ––> Attenuation to Antenna Pad Set RBW and VBW 300 kHz Set sweep time 50 ms Set TRIG: SWEEP CONT, VIDEO –10 dBm E Nokia Mobile Phones Ltd. Page 32 Issue 1 12/99...
  • Page 33 +/– 1 dB +/– 2.0 dB 16.0 dBm +/– 1 dB +/– 2.0 dB 12.0 dBm +/– 1 dB +/– 2.0 dB 8.0 dBm +/– 1 dB +/– 2.0 dB E Nokia Mobile Phones Ltd. Page 33 Issue 1 12/99...

  • Page 34: Path Of The Transmitted Signal

    – IF BPF –Upconverter – BPF– TX Driver amplifier – BPF– Power Amplifier – Directional Coupler– Duplexer – Diplexer – An- tenna. Power detection and power control circuits are located under the power control part of this guide. E Nokia Mobile Phones Ltd. Page 34 Issue 1 12/99...

  • Page 35: Troubleshooting Diagrams For Tx

    Check C909, R905 and Check TXC insertion loss C910 V: >1.5 V <4dB TX driver input power Start Power control Change driver N902 P: > –20 dBm troubleshooting Check COBBA TXCDAC (BaseBand) E Nokia Mobile Phones Ltd. Page 35 Issue 1 12/99...
  • Page 36 Note! output at R925 Check R925 check also I/Q–resistors R760 P ≅ –18dBm Check Is TX I/Q I&Q COBBA V: 0.8 VDC +/– 0.4 DACs V (symmetrical) (BaseBand) Change N700 E Nokia Mobile Phones Ltd. Page 36 Issue 1 12/99...

  • Page 37: Tdma800 Tx

    Start AMPS Is AMPS mode OK troubleshooting Check Vbias Check PIN16 N903 CCONT V: > 2.8 V VR7_bias (BaseBand) Change Start power level N700 and/or tuning. Does it work? Cobba E Nokia Mobile Phones Ltd. Page 37 Issue 1 12/99...

  • Page 38: Tdma1900 Tx

    Resolder or change The PA ground slug Make press down test might be poorly soldered for PA. Inreasing or there is delamination current consumption ? on chip. TDMA1900 continued next page E Nokia Mobile Phones Ltd. Page 38 Issue 1 12/99...
  • Page 39 Max 4 dB. TXCDAC output (BaseBand) P:> –20 dBm Check TX–IF Check Z900 insertion loss. If > f: 196.23 MHz 4dB, check R926 P:> –35 dBm and C923 or change N700. E Nokia Mobile Phones Ltd. Page 39 Issue 1 12/99...

  • Page 40: Power Control Loop

    26.8 1478 23.5 1350 23.0 1275 20.0 –40 1120 20.0 –53 1120 16.0 –127 16.0 –128 12.0 –187 12.0 –177 –228 –215 –188 –205 –229 –253 –4.0 –290 –4.0 –329 E Nokia Mobile Phones Ltd. Page 40 Issue 1 12/99...

  • Page 41: Synthesizers

    The 3–multiplier is a integrated solution in EROTUS and it is used to gen- erate second LO frequency for the receivers. The 3*multiplier output sig- nal is multiplied by 2 and then it is fed to the 2nd downconverter. E Nokia Mobile Phones Ltd. Page 41 Issue 1 12/99...

  • Page 42: 19.44 Mhz Oscillator

    P: >0.3 Vpp Check 2G PLL Change capacitor N880, pin 15 C854 P: >0.8 Vpp Check 3X tank Check L762 and C745. N700, C745 P: >150 mVpp Change EROTUS. continues next page E Nokia Mobile Phones Ltd. Page 42 Issue 1 12/99...
  • Page 43 Max 4 dB. TXCDAC output (BaseBand) P:> –20 dBm Check TX–IF Check Z900 insertion loss. If > f: 196.23 MHz 4dB, check R926 P:> –35 dBm and C923 or change N700. E Nokia Mobile Phones Ltd. Page 43 Issue 1 12/99...

  • Page 44: Vhf Vco

    Change N770 missing components Note! Check PD1 at Check all solderings and Change V723 C790 missing components V=1–2 (LB) =2.8–3.8 V (HB) Note! CHANGE EROTUS! Check all components and soldering E Nokia Mobile Phones Ltd. Page 44 Issue 1 12/99...

  • Page 45: Amps& Tdma800 Uhf Synthesizer

    Check feedback input level of EROTUS Change C825 (at C825) P=–10–0 dBm Start BB Check EROTUS (N700) troubleshooting (SCLK):2.8V pin 55 (SDATA):2.8V (SENA1):2.8V SENA is 0 during SCLK and SDATA E Nokia Mobile Phones Ltd. Page 45 Issue 1 12/99...

  • Page 46: Tdma1900 Uhf Synthesizer

    Check C888 & input level of L880 N870 P=–10–0 dBm Check N870 Start BB pin 11 (SCLK):2.8V pin 12 (SDATA):2.8V troubleshooting pin 13 (SENA1):2.8V SENA is 0 during SCLK and SDATA E Nokia Mobile Phones Ltd. Page 46 Issue 1 12/99...

  • Page 47: Rf Asic Data

    Mxr RF – Mixer RF input port GND/½IF Ground (½–IF tuing in N721) MXR IF – Mixer IF input port Ground Vdd MXR 2.8V Mixer LO–buffer Vdd and LO–buffer tuning E Nokia Mobile Phones Ltd. Page 47 Issue 1 12/99...

  • Page 48: Power Amplifiers N903 & N960

    (DC coupled) RF OUT RF output and bias for the output stage. 3rd stage collector. RF OUT RF output and bias for the output stage. 3rd stage collector. E Nokia Mobile Phones Ltd. Page 48 Issue 1 12/99...

  • Page 49: Penta Regulator N702

    – RF output VDD2 2.8V Supply voltage Not connected Not connected Ground VDD3 2.8V Supply voltage Ground IF IN – Intermediate frequency input Not connected TX ENA >2V TX enable E Nokia Mobile Phones Ltd. Page 49 Issue 1 12/99...

  • Page 50: Tdma1900 Pll-Circuit N870

    Complementary crystal frequency input XTALA – Complementary crystal frequency input GND(CP) Ground for charge pump 4.8V Supply voltage for charge pump Iset – charge pump currents setting LOCK – Out of lock detector E Nokia Mobile Phones Ltd. Page 50 Issue 1 12/99...

  • Page 51: Warranty Transfer

    – Use the returned phone as a swap phone. – When the Warranty Info is transferred into a swap phone the Warranty State changes to USE mode. – Send the broken phone to the central service. E Nokia Mobile Phones Ltd. Page 51 Issue 1 12/99...
  • Page 52 NSW-6 PAMS Technical Documentation Disassembly & Troubleshooting This page intentionally left blank. E Nokia Mobile Phones Ltd. Page 52 Issue 1 12/99...

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