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Nokia 7600 Troubleshooting Manual

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Customer Care Solutions
NMM-3 Series Transceivers
6-Troubleshooting
Copyright  2003 Nokia Corporation
Issue 1 (11/2003)
Page 6-1
Company Confidential

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  Summary of Contents for Nokia 7600

  • Page 1 Customer Care Solutions NMM-3 Series Transceivers 6-Troubleshooting Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-1 Company Confidential...
  • Page 2: Table Of Contents

    Tables Baseband Components ....................WCDMA tuning alignments to be run when RF components are changed ..GSM tuning alignments to be run when RF components are changed ... Copyright  2003 Nokia Corporation Page 6-2 Issue 1 (11/2003) Company Confidential...
  • Page 3: Introduction To Nmm-3 Troubleshooting

    Flash phone before disassembling it if fault is not obvious and Phoenix connection is OK. Disassemble phone: Try to locate failed module, is it Engine, UI or camera module. Check failed module visually: Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-3 Company Confidential...
  • Page 4: Nominal Current Consumption

    Measurements have been made with a current probe connected to an oscilloscope. Operating mode Current consumption Idle 90 mA 2w audio call (backlights off) 350 mA Viewfinder 260 mA Copyright  2003 Nokia Corporation Page 6-4 Issue 1 (11/2003) Company Confidential...
  • Page 5: Diagnostics

    Phoenix check battery 19.2MHz? L899. OK? voltage, recalibrate if necessary. Replace Replace Possible defective G820 Is flash problem with part. programming TIKU, UEME, or working? Memories. Flash fault Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-5 Company Confidential...
  • Page 6: Flash Programming Fault

    Replace manufacture ID Program and device ID Flash D451 Possible short circuit under TIKU or program flash. Phone is Replace or reflow dead devices, Retest. OK? End (reset) Copyright  2003 Nokia Corporation Page 6-6 Issue 1 (11/2003) Company Confidential...
  • Page 7: Sim Card Fault

    Voltage on C405. flashing. Is it Is it ~3.0V? ~1.8V? Check SIM Check SIM lines, if power-up OK replace UEME sequence. Is it OK D200. Replace TIKU D300 Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-7 Company Confidential...
  • Page 8: Keypad Fault

    D300. Check S403, R400 Measure COL0 from and R437, if it still S402, when pressed, is fails replace TIKU there a 50µs pulse? D300. Replace TIKU Continue D300 Copyright  2003 Nokia Corporation Page 6-8 Issue 1 (11/2003) Company Confidential...
  • Page 9 J301 lines from X400. If OK when a key is pressed. replace TIKU. Is voltage level ~1.8V? When a key is pressed, do the LED’s illuminate? Illumination Fault Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-9 Company Confidential...
  • Page 10: Display Fault

    VFLASH1, and Check for activity on Replace TIKU data, address, and WRX D300. lines and the RESX line on power up. OK? Are Display Illumination LEDs Fault illuminating Copyright  2003 Nokia Corporation Page 6-10 Issue 1 (11/2003) Company Confidential...
  • Page 11: Illumination Fault

    R426. Is it ~2.2V? solder joints. defective part. Measure voltage on Replace Retest V400 Cathode. Is it N402 ~10.5V? Check V400 and L400. Replace Replace Are they OK? defective part. N400 Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-11 Company Confidential...
  • Page 12: Charge Fault

    Use Phoenix to circuit including read BTEMP. X210, R211 and ~Ambient? C227. OK? Replace defective part. Using Phoenix with the JBV-1 recalibrate battery voltage and charger current and voltage. Copyright  2003 Nokia Corporation Page 6-12 Issue 1 (11/2003) Company Confidential...
  • Page 13: Accessory Fault

    XEAR XEAR and XMIC and XMIC. Check L405-L407, Check L404, L403, Replace C416-C419 and R415, C412 and defective part. R421. OK? C413. OK? Replace UEME Replace UEME Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-13 Company Confidential...
  • Page 14: Audio Fault

    C103, C104 and L102 part replace earpiece if replace defective part. necessary. OK? Is the DC bias voltage at R405 Replace and R406 ~1.35V? UEME Copyright  2003 Nokia Corporation Page 6-14 Issue 1 (11/2003) Company Confidential...
  • Page 15: Camera Fault

    Replace mode, check VOUT regulator N102 on N102 is ~1.8V In view finder Replace TIKU mode, check for D300 activity on signal and clock lines. Replace camera module. Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-15 Company Confidential...
  • Page 16: Usb Fault

    N401 Vpu goes to 3.3V. Replace if defective. Is there any activity on D+ and D-? Check R423, R424, R410, R413 and X410. OK? Replace N401. Replace Replace TIKU defective part. Copyright  2003 Nokia Corporation Page 6-16 Issue 1 (11/2003) Company Confidential...
  • Page 17: Gsm900/1800 Tx Troubleshooting

    900 & 1800 PA CONTROL Check power control VPCTRL >1.5V max loop components Replace HELGO C564/C565 OK ? OK ? PA & ant. switch Replace faulty troubleshooting component Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-17 Company Confidential...
  • Page 18: Helgo Troubleshooting

    TXP & TXC signals Check with RF FET Probe: VCO Output signal 3589.6Mhz CH37 (GSM900) Synthesizer 3495.6MHZ CH700 (GSM1800) Troubleshooting Level>-10dBm Replace Helgo Check modulator output components Replace faulty components Copyright  2003 Nokia Corporation Page 6-18 Issue 1 (11/2003) Company Confidential...
  • Page 19: Pa & Antenna Switch Troubleshooting

    VTXB-G= 2.8V pulsed (0V GSM1800) VTXB-D= 2.8V pulsed (0V GSM900) OK ? Replace faulty component Replace PA Check components around PA Replace HELGO OK ? Replace faulty component Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-19 Company Confidential...
  • Page 20: Gsm Rx Troubleshooting

    Helgo 900MHz chain Synthesizer In Rx mode functional troubleshooting Check ant switch Spectrum analyser Check Helgo Inputs L633,L634 -54dBm Check Baseband VR2,VR3,VR4,VR5=2.8V Troubleshooting Helgo serial interface HELGO Troubleshooting Copyright  2003 Nokia Corporation Page 6-20 Issue 1 (11/2003) Company Confidential...
  • Page 21: Gsm1800 Rx Troubleshooting

    Helgo 1800MHz Synthesizer In Rx mode Chain troubleshooting Functional Check Ant Switch Spectrum analyser Check Helgo inputs L635,L636 -55dBm Check Baseband VR2,VR3,VR4,VR5=2.8V Troubleshooting Helgo serial interface HELGO Troubleshooting Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-21 Company Confidential...
  • Page 22: Gsm900/1800 Synthesizer Troubleshooting

    Check with meter VCO Check VCO loop Check synth serial Helgo control voltage filter components Interface on Helgo Troubleshooting Vc=0V? VCO control Replace faulty Replace voltage>4V components Replace Copyright  2003 Nokia Corporation Page 6-22 Issue 1 (11/2003) Company Confidential...
  • Page 23: Wcdma Tx Troubleshooting

    Check TXA2 Volt drop Troubleshooting Baseband across R906. Troubleshooting DAC=800 V ≈ 80mV Check DC conditions Check components On Hex. around Hex VCCTC=VPLUS= VCCOUT =VCCBIAS =2.8v Replace faulty components Replace Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-23 Company Confidential...
  • Page 24 Faulty (C980)1.3v? component Check VREG=2.8v Check coupler, Check detector isolator & duplexer Change voltage (C960) 0.6v<V<1.5v Replace Check components faulty around detector component circuit OK Replace faulty component Copyright  2003 Nokia Corporation Page 6-24 Issue 1 (11/2003) Company Confidential...
  • Page 25: Wcdma Rx Troubleshooting

    Check VR4 Baseband SAW Filter Low gain=-70dBm 2.8v Troubleshooting Mid Gain=-55dBm High gain =-44dBm Check signal level at SAW Replace C842 and/ Filter output C844 or C844 -45dBm Replace Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-25 Company Confidential...
  • Page 26: Wcdma Rx Synthesizer Troubleshooting

    Check with meter VCO Check VCO loop Check synth serial control voltage R802= filter components interface on Rex Troubleshooting Replace faulty Replace VCO control components voltage >4V Replace Copyright  2003 Nokia Corporation Page 6-26 Issue 1 (11/2003) Company Confidential...
  • Page 27: Wcdma Tx Synthesizer Troubleshooting

    Check with meter VCO Check VCO loop Check synth serial control voltage R914= filter components interface on Tex Troubleshooting Replace faulty Replace VCO control components Voltage >4V Replace Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-27 Company Confidential...
  • Page 28: Gsm/Wcdma Antenna Troubleshooting

    Camera supply 2.8V CAMSWITCH 116 R110 Camera switch 1.8V FBUSRX 400 J400 Pin 3 Flash programming data 2.78V digital signal From FPS-8 / PC to phone and phone control Copyright  2003 Nokia Corporation Page 6-28 Issue 1 (11/2003) Company Confidential...
  • Page 29 SDRAM Supply voltage 2.85V 453 C453 Flash programming volt- 1.8V Internal FPS-8 external VPP source 12V External 300 C301 COWIS regulator out 1.8V RFCKOCK 301 C300 Reference Clock 19.2MHz Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-29 Company Confidential...
  • Page 30 GSM / WCDMA Rx supply 2.78V 221 C234 WCDMA Rx VCO supply 2.78V 222 C233 GSM VCO supply 2.78V SMPSCLK 223 J201 VTIKU regulator mode 2.8V active mode select 0V sleep mode Copyright  2003 Nokia Corporation Page 6-30 Issue 1 (11/2003) Company Confidential...
  • Page 31: Calibration Required When Components Changed

    Tx Power Select Rx Cal Filter Balance Cal Tx IQ Tuning Level Tuning Filter Cal Response Cal HELG0 (N600) PA (N550) ANT SW (Z500) VCO (G650) TX SAW (Z650) Copyright  2003 Nokia Corporation Issue 1 (11/2003) Page 6-31 Company Confidential...
  • Page 32 NMM-3 Company Confidential 6-Troubleshooting CCS Technical Documentation This page has been deliberately left blank Copyright  2003 Nokia Corporation Page 6-32 Issue 1 (11/2003) Company Confidential...