Programme’s After Market Services NME–3 Series Transceivers Troubleshooting Issue 1 10/99
NME–3 Troubleshooting PAMS Technical Documentation CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Radiounit failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flashing failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Phone doesn’t Power On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Phone doesn’t Power Off . . . . . . . . . . . . . . . . . . .
NME–3 PAMS Technical Documentation Troubleshooting Introduction This document gives a comprehensive guide to NME–3 faultfinding. NOTE: The first thing to do is carry out a through visual check of the modules and ensure that: a) There is no mechanical damages at the units b) Soldered joints are o.k. c) check which unit is broken HS or Radiounit NOTE: Make sure that the system is installed as specifided in the AS documentations. (Power supply connected to the unit, IGNS high, Handset conneced,...
NME–3 PAMS Troubleshooting Technical Documentation Radiounit failures This chapter describes how to find failures in the Radiounit: Radiounit doesn’t Powerup Connect the Radiounit to +12V while ignition sense is switched off and look to see if the Leds are turned ON for a short time – If they don’t turn on at all, – check the current consumtion, if it is about 300– 400uA the wakeup logic should be checked, if it is much less or more there is a Problem in the powersupply – Check the status of all voltage
NME–3 PAMS Technical Documentation 12V at V1 Troubleshooting No Check PCB fuse, and solderjoints on systemconnector Yes 12V at C437 No Check L13 Yes 3.8V at C426 No Check N402 and V404 Yes 12V at C410 No PURX high No D701 Pin 9 Yes 8V at C415 Check wakeup logic Yes No voltage at C403 =0.7V No Yes Check N401 Yes Check V400, V403 Check Overvoltagecircuit No 8V at C404 Check N400 Yes Powersupply O.K. Figure 1.
NME–3 PAMS Technical Documentation Troubleshooting Is Pin 9 of D702 high Disconnect the Powersupply Connect Probe to Pin 3 of D701 set scope to singletrigger falling edge, reconnect the powersupply Yes No Is Pin 13 of D702 high No Scope pic according figure 1 Yes Check circuit on Pin 13 of D702 No Check D701 Yes D701 Pin 9 high No Check CCONT Check D702 Yes Check that a low pulse is produced on Pin 10 of D702 when switching Power On No LEDs on Check Powersupply Yes Check Digitalpart Figu
NME–3 PAMS Technical Documentation Troubleshooting 32 Khz clock on N700 Pin 48 No Check CCONT and 32Khz oscilator Yes 13 Mhz clock on N700 Pin 48 No Check VCXO circuit Yes Frequent data from Yes MAD to CCONT on Try to flash new SW CCONT PIN 49–51 No Check D600.. D603 for open solder joints shortcircuits and broken components Figure 3.
NME–3 PAMS Technical Documentation Troubleshooting D702 Pin 10 high ?? Yes Check circuit connected to this pin No Is SW producing a Powerdown signal on R721 No Signal on R600 low No check related circuit Yes Check circuit arround V707 and D702 Signal on R603 low No check related circuit Yes Try to Flash new SW check digital part Figure 4.
NME–3 PAMS Technical Documentation Troubleshooting Flashing not possible The flash programming can be done via system connector X1. In production, the first programming is done applying 12V flashvoltage to TP610. In aftersales the Flashvoltage is generated by an on board regulator. The main differences between production flashing and aftersales flashing are : a) FLASH programming voltage is produced in a different way. b) Signal routings are different.
NME–3 PAMS Technical Documentation Troubleshooting CCONT pin 54 ( PURX ) selftest passed Page 10 MAD pin 38 ( MCUAD0) MAD pin 134 ( ExtSysResX)) Issue 1 10/99
NME–3 PAMS Technical Documentation Troubleshooting Production Flash Programming Failure (1) Flash programming doesn’t work YES If the fault information from the prommer is: a) MCU doesn’t boot b) serial data line failure c) serial clock line failure connect: connect watchdog disable (WDDIS) line (N700 PIN 28) to ground OK EEPROM (D601) Pin 8 (VBB) 2.8V C706 (VXO) 2.8V NO See section: Phone is totally dead YES NO check C213, R213 D701 PIN 9 PURX =”1” 2.
NME–3 PAMS Technical Documentation Troubleshooting Production Flash Programming failure (2) Flash progrmming doesn’t work YES If the fault information from the prommer is: External RAM fault YES Check pins of SRAM (D603) Check control lines of SRAM: RAMSelX ... Flash progrmming doesn’t work YES If the fault information from the prommer is: Algorithm file or alias ID don’t find, ID is unknown etc. YES Check pins of FLASH (D602) Check control lines and upper data lines (15:8) of FLASH: ROM1SelX...
NME–3 PAMS Technical Documentation Troubleshooting Aftersales Flash Programming failure (3) Flash programming doesn’t work YES If the fault information from the prommer is: a) MCU doesn’t boot b) serial data line failure c) serial clock line failure connect: connect the shortcircuit wire from N700 pin 29 to Ground (watchdog) OK EEPROM (D601) pin 8 (VBB) C706 (VTX) 2.8V NO VBAT is correct 3.8 V YES N700 is faulty YES NO check C213, R213 D701 Pin 9 PURX = ”1” (2.
NME–3 PAMS Technical Documentation Troubleshooting Aftersales Flash Programming failure (4) Flash progrmming doesn’t work YES If the fault information from the prommer is: External RAM fault YES Check pins of SRAM (D603) Check control lines of SRAM: RAMSelX ... Flash progrmming doesn’t work YES If the fault information from the prommer is: Algorithm file or alias ID don’t find, ID is unknown etc. YES Check pins of FLASH (D602) Check control lines and upper data lines (15:8) of FLASH: ROM1SelX...
NME–3 PAMS Technical Documentation Troubleshooting Phone doesn’t Power On This is described in section 2.2.1 Phone doesn’t Power Off Press Powerbutton, and check if Powerdown pulse is produced on R 721, if it isn’t check Powerbutton circuit, if it is produced check circuit around D702 according to Figure 5. Set Auto power off to 45 seconds, switch Ignition Off, look if a message Power will switch of if not used comes up after some seconds.
NME–3 PAMS Technical Documentation Troubleshooting 1. DSP initialization done 2.Synchronization to network done 3. Registrarition to network done. 1 2 3 MAD2 pin 91 (DSPXF) Figure 9.
NME–3 PAMS Technical Documentation Troubleshooting 1 dsp constants download init initialize patch code download initialization done MAD2 pin 91 (DSPXF) 2 PSW search last PSW OK channel scan starts synchronization OK MAD2 pin 91 (DSPXF) 3 send RACH RACH OK go SDCCH imediate assigment OK MAD2 pin 91 (DSPXF) Figure 10.
NME–3 PAMS Technical Documentation Troubleshooting Phone register failure Phone doesn’t register to the network or phone doesn,t make a call YES Analog supply voltage VCOBBA is >2.7 V at pin 7,12 ... of Cobba (N800) Check N700 NO YES Analog reference voltage Vref is 1.5 V at pin 9 of Cobba (N800) Check R800,C800 NO YES Supply voltage VCP (N700 pin 32) > 4.8 V Supply voltage VRX (N700 pin 9) > 2.7 V Supply voltage VSYN_1 (N700 pin 15) > 2.7 V Supply voltage VSYN_2 (N700 pin 4) > 2.
NME–3 PAMS Technical Documentation Troubleshooting Receiver faults This section gives an overview of the strategies used to hunt failures and defects in the receiver path of the radio unit. Tracking of receiver errors is best done by following the RX signal path and tracking the signal applied to the antenna port with a probe and a spectrum analyzer. The following steps should be done prior to the signal tracking: – Apply test signal generated by CMD55 to antenna port.
NME–3 PAMS Technical Documentation Troubleshooting Receiver Fault (1) RX FAULT Duplexer (Z100) Ant Pin: –56dBm ? No C135: Check soldering! If soldering okay: Change C135! No Z100:Check soldering! If soldering okay: Change Z100! Yes Duplexer (Z100) RX Pin: –59dBm ? Yes RX Filter (Z101) Input: –39dBm ? No Yes Check Bias of V100! Vbase = 0.9 V (at R109) Vcoll = 2.
NME–3 PAMS Technical Documentation Troubleshooting Receiver Fault (2) 1st IF 71MHz Mixer (N100) IF Output: –50dBm at 71 MHz? No Yes Mixer (N100) RF LO Input: 9dBm at 1018MHz? No UHF LO Yes N100: Check soldering! If soldering is okay change N100! IF Amp output: C104 IF signal: –37dBm at 71 MHz No Yes Check Bias of V102: Vbase=0.9V Vcoll=1.
NME–3 PAMS Technical Documentation Troubleshooting Receiver Fault (3) 2nd IF 13MHz Plussa (N101): Pin 8: 0dBm at 232 Mhz? VHFLO No Yes Plussa (N101): Pin 44: –3dBm at 13 Mhz? Plussa (N101): Pin 47: 2.8V? No Yes No Check VRX1 supply voltage at CCONT! No Check RXC control voltage from COBBA (N800) Pin 18! Yes Plussa (N101): Pin 53: 1.
NME–3 PAMS Technical Documentation Troubleshooting Receiver Fault (3a) A Plussa (N101): Pin 29,30: –2dBm at 13 MHz? No Plussa (N101): Pin 29,30: 1.
NME–3 PAMS Technical Documentation Troubleshooting Receiver Fault (4) COBBA Cobba (N800): Pin 7,12,21,25,63: 2.8V DC? No Check Cobba voltage! CCONT Pin 22 Yes Cobba (N800): Pin 27,53: 2.8V DC? No Check VBB voltage! CCONT Pin 55 No Check Vref voltage! CCONT Pin 13 through R253 Yes Cobba (N800): Pin 9: 1.
NME–3 PAMS Technical Documentation Troubleshooting Receiver Fault (5) UHFLO UHFLO (G301): Output: –10dBm at 1018 MHz UHFLO (G301): Vcc pin: 2.8V DC? No Check VVCO and R305! No Yes Yes UHF LO (G301): VC Voltage (R313) 2.2V at Mid CH? No UHFLO (G301): Check soldering! Also check Plussa (N101) connections! Yes Yes B Change G301! Check bias of V303 Vbase= 0.73V Vcoll= 7.
NME–3 PAMS Technical Documentation Troubleshooting Receiver Fault (5a) B UHFLO (G301) oscillates at any frequency? Change G301! No Yes Plussa (N101): Pin 21: 13 MHz? No Check C304 and soldering at Plussa (N101)! No Check VSYN from CCONT (N700) and CNTVR3 control from MAD (D600)! No Check VCP voltage from CCONT (N700) Pin 32! No Check soldering at N101 and R125! If OK, change R125! Yes Plussa (N101): Pin 9,22,25: 2.8V DC? Yes Plussa (N101): Pin 17,28: 5.
NME–3 PAMS Technical Documentation Troubleshooting Receiver Fault (6) VHFLO Plussa (N101): Pin 18: 2.0V? Does the VCO oscillate No Yes at any frequency? No Yes V301 collector: 2.6V DC? Check soldering of components and change defect components if necessary! No Check VVCO supply voltage! Yes V301 base: 1.7V DC? Plussa (N101): Pin 9,22,25: 2.
NME–3 PAMS Technical Documentation Troubleshooting Receiver Fault (7) AFC RSSI tuning OK? RX Fault No Yes Cobba (N800): Pin 19 between 0.5 ... 2.3V? No No Check AFC line for short circuits! If OK, change Cobba (N800)! Yes Yes Change Cobba (N800)! Set Spectrum Analyzer! Frequency: 13MHz Span: 10kHz RESBW:3kHz VCTCXO (G300): Output frequency exactly 13MHz? Cobba (N800): Load at Pin 19: >1M Ohm? No Use Wintesla to set AFC to MAX! VCTCXO (G300): AFC voltage: 2.
NME–3 PAMS Technical Documentation Troubleshooting Transmitter faults The following chapter gives an overview of the principles helpful to hunt errors in the transmit path of the radio unit. The best possibility to look for the root cause of a transmitter malfunction is to track the transmit signal through the transmitter path starting at the RF–BB interface to the antenna port.
NME–3 PAMS Technical Documentation Troubleshooting Transmitter Fault (1) TX FAULT Plussa (N101) Pin 8: –2dBm at 232MHz TXLEV: Test VHFLO No Yes Plussa (N101): Pin 61,62: –10dBm at 116 MHz C No Yes CRFU1A (N200): Pin 2.
NME–3 PAMS Technical Documentation Troubleshooting Transmitter Fault (1a) C Plussa (N101): TXQP,TXQN,TXIP,TXIN okay? No Check TXQP,TXQN,TXIP,TXIN lines from Cobba (N800, pin 13...
NME–3 PAMS Technical Documentation Troubleshooting Transmitter Fault (1b) Note: For the steps described on this page the transmitter should be switched back to continuos mode! D CRFU1A (N200): Pin 30: –10dBm at 902 MHz Yes TX Fault 1 No CRFU1A (N200): Pin 1,29: 2.8V DC? No Check VTX supply voltage from CCONT (N700)! Yes CRFU1A (N200): Pin 16: 1.
NME–3 PAMS Technical Documentation Troubleshooting Transmitter Fault (2) Note: For the steps described on this page the transmitter should be switched to burst mode! TX power level should be 2! TX Fault 1 TX Filter (Z250): Input: 6 dBm? No Yes V8PA supply at C624 OK? Check V8PA regulator (N400) and switching circuit (V253, S251) for soldering and defective components! No Yes Check bias of V254: Vbase =0.
NME–3 PAMS Technical Documentation Troubleshooting Transmitter Fault (2b) E Duplexer (Z100) Output: 39 dBm? No Check duplexer (Z100) for soldering and short circuits! If OK, change duplexer (Z100)! Yes Antenna port (X240) Output: 39 dBm? No (C135): Check soldering! If OK, change component! Yes Ant connector (X240): Check for soldering and short circuits! If okay, change connector (X240)! Page 34 Issue 1 10/99
NME–3 PAMS Technical Documentation Troubleshooting Transmitter Fault (3) Note: For the steps described on this page the transmitter should be switched to burst mode! TX power level should be 2! Power control TX Fault Transmitter OK? No Yes Plussa (N101): Pin 11: TXC pulse OK? No Cobba (N800): Pin 17 TXC pulse OK? No Check Cobba (N800) for soldering and short circuits! If OK, change Cobba (N800)! Yes Yes R110, R111: Check for soldering and short circuits! If OK change defective components! Pl
NME–3 PAMS Technical Documentation Troubleshooting Transmitter Fault (4) F OpAmp (N250): Pin 6: Picture 12? No Switch (N250): Pin 1: Picture 12? No Check S250 for soldering and short circuits! Change components if soldering is okay! Yes Yes OpAmp (N250): Pin 6: Picture 12? No Check R260, R256, R257, R250, R255, C 254 for soldering and short circuits and change defective components! Yes Check N250 and supply (8V at pin 4) for soldering and short circuits! If OK, change N250! OpAmp (N250): Pin
NME–3 PAMS Technical Documentation Troubleshooting Transmitter Fault (5) DetectorFault Diode (V252): Pin 3: Picture 17? No Transistor (V251):: Emitter: 8V DC? Check V8PA supply! No Yes Yes Check R272, R271, C261, R269 for short circuits and soldering! Change defective components! Transistor (V251): Base: Picture 18? No PA Module (N254): Pin 2: 12V DC? Check VPA supply! No Yes Yes Check R264, R267, C260, R265, R262, V252, R259, V261 for short circuits and soldering! Change defective compone
NME–3 Troubleshooting PAMS Technical Documentation Clock Signals Picture 1. COBBACLK – signal Picture 2.
PAMS Technical Documentation NME–3 Troubleshooting Synthesizer Signals Picture 3. SCLK – signal Picture 4. SDATA – signal Picture 5.
NME–3 Troubleshooting PAMS Technical Documentation Transmitter Signals Picture 6. TXQP, TXQN, TXIP and TXIN – signal Picture 7.
PAMS Technical Documentation NME–3 Troubleshooting Picture 8. TXC – signal at Plussa Pin 5, Pin 15 Picture 9.
NME–3 Troubleshooting PAMS Technical Documentation Picture 10. Vapc – signal (TXLEV2) Picture 11.
PAMS Technical Documentation NME–3 Troubleshooting Picture 12. OPAMP (N250) Pin 6 Picture 13.
NME–3 Troubleshooting PAMS Technical Documentation Picture 14. OPAMP (N250) Pin 3 Picture 15.
PAMS Technical Documentation NME–3 Troubleshooting Picture 16. OPAMP (N250) Pin 1 Picture 17.
NME–3 Troubleshooting PAMS Technical Documentation Picture 18. Signal V251 base Picture 19.
NME–3 PAMS Technical Documentation Troubleshooting AMC not working Switch on the phone, with no load on the AMC ouput AMC output high ? No highlevel on R458 Yes No Check D600 for shortcicuits or open Joints Yes Add 150 Ohm Load to AMC output AMC output high ? Ask load from Yes costumer check cableing No Check C451, R455 R459 V453 Follow Levels in AMC circuit Figure 11.
NME–3 PAMS Technical Documentation Troubleshooting Car Radio Mute not working Switch on the phone, make a call with no load on the CRM ouput No CRM output low ? highlevel on R453 Yes No Check D600 for shortcicuits or open Joints Yes Add 150 Ohm Load to CRM output and 12V CRM output low ? Ask load from Yes costumer check cableing No Check C450, R451 R454 V45 Follow Levels in CRM circuit Figure 12.
NME–3 PAMS Technical Documentation Troubleshooting Backlight dimming not working Apply different Dutycycles to BLD input Inverted BLD at R712 ? DC Level at C729 follows dutycycle No Check circuit before R712 No Check BLD circuit Yes Check N700 for bad solderpoints shortcircuits, or change CCONT Figure 13. Backlight dimming not working Audio failure Handsetmode Setup a call to a GSM–Tester If uplink is broken use testbox to feed a audiosignal into the circuit, and follow the signal to the COBBA.
NME–3 PAMS Troubleshooting Technical Documentation If both links are broken, start the investigation on the N800 side as described Audiofailure Handsfreemode First steps: Check that 8V DC are on the HF–Micinput, when no load is connected.
NME–3 PAMS Technical Documentation Troubleshooting Pin 26 N650 2.8V ? No Check Z650 Yes Pin 4 N650 –5V ? No Check Chargepump Yes Pin 27 N650 +5V ? C650..C653, N650 No Yes Use Wintesla and Loopbackadapter to set the status of every loop On and Off. Follow every signal from the Madoutput to the connector and back from the connector to the MADinput Figure 14.
NME–3 PAMS Technical Documentation Troubleshooting SIM–Card not recognized Disconnect SIM from phone, connect probe to C750 2.8V at C750 No Check R751, check C750 and X750 for Shortcircuits Yes Press SIM. switch Yes No 0V at C750 Check contact of SIM–Reader check switch Yes Put Simcard on Simreader using Simadapter SIM recognized ? No Put insulated wire to C750, assemble Bottomenclossure, repeat test using big SIM–Card to close switch Yes Follow instructions described in Figure 10 Figure 15.
NME–3 PAMS Technical Documentation Troubleshooting The hardware of the SIM interface from MAD2 (D600) to the SIM connector (X750) can be tested without the SIM card. You have to close the SIM–Switch by using the SIMCard adapter with a SIM–Card. When the power is switched on, the Sim interface is started once at 3V and once at 5V. Check with a storage osciloscope, that VSIM,RSTand DATA rise up to 3V and 5V for some short time, and that there is 3V/5V Clocksignal on the Clock Pin.
NME–3 PAMS Technical Documentation Troubleshooting SIM Card failure Insert SIM card fault YES Voltage level < 1.
NME–3 PAMS Technical Documentation 2 Troubleshooting Handset failures This section describes faults by active components and trace defects, serial resistances, interconnections etc.. When you get a defective HS then first connect the HS to 8V and check if the Nokia hands are shown in the display. In this case you can be sure that main parts of the HS are running (MCU and oscillator, 5V and 3V power supply, reset circuit, LCD circuit), if not go to section 3.1.
NME–3 PAMS Technical Documentation Troubleshooting HS general fault HS general fault No 8V supply ok? Limits 7.5V – 8.0V C106 Check Curly–Cord Yes 5V supply ok? Limits 4.8–5.2V C113 No No Check V100 Change V100 Yes No Check N100 Yes 3V supply ok? Limits 2.8–3.2V C124 Change N100 No Change N103 Yes Measure Pin 3 / N101 if High Limits 4.5–5.0V No Measure Pin 2 / N101 if Low Limits 0–0.5V No Change V101 Yes Yes Measure Pin 4 / N102 if High Limits 4.8–5.
NME–3 PAMS Technical Documentation Troubleshooting Continue Yes Check oscillator Pin 77 / D300 Scope 14.6–14.
NME–3 PAMS Technical Documentation Troubleshooting MBUS fault Connect the Handset to a Radiounit and switch on the equipment. Between the MBUS messages are times without datatransfer consider these measurements.
NME–3 PAMS Technical Documentation Troubleshooting Audio fault 1 Microphone path fault For checking the microphone path connect the handset to an radiounit and connect this equipment to an power supply and an CMD55. Set the CMD55 for audio in the echomode and make a speech test. With a microphone path fault the first step is to check the microphone, therefore change the complete microphone and boot and then check the microphone path again.
NME–3 PAMS Technical Documentation Troubleshooting Earpiece path fault For checking the earpiece path connect the handset to an radiounit and connect this equipment to an powersupply and an CMD55. Set the CMD55 for audio in the echomode and make a speech test. With an earpiece path fault the first step is to check the earpiece resistance is between 26 and 36 ohms. If not then change the complete B–cover with earpiece. Then check the earpiece path again.
NME–3 PAMS Technical Documentation Troubleshooting LCD fault If there is an LCD fault first check what kind of failure it is. If there are missing lines or rows, missing pixels or permanently on pixels you have to change the LCD module, because these failures are related to the module itself. When you connect the HS to 8V power supply and there are no Nokia Hands on the display you have to perform the following steps.
NME–3 PAMS Technical Documentation Troubleshooting SIM fault Check 3V power supply at C401 (limits 2.8V to 3.2V) No Check 3V power supply at C400 (limits 2.8V to 3.2V) No Check voltage at basis of V400 (limits 0V to 0.5V) for 3V Yes Yes Yes Change V400 No Check voltage of gate V401 limits 0V to 0.5V Change MCU D300 Yes Change V401 Check 5V power supply at C400 (limits 4.8V to 5.2V) No No Check voltage at basis of V400 (limits 0V to 0.
NME–3 PAMS Technical Documentation Troubleshooting Keypad fault First check with WINTESLA which keys are not working. Then change keymat and repeat test. If anything is ok keymat was defective otherwise check connections from MCU to keypad matrix. If all connections are ok check diodes and pullup resistors for keypress interrupt. If ok change the MCU (D300).
