Customer Care Solutions NMM-3 Series Transceivers 6-Troubleshooting Issue 1 (11/2003) Copyright 2003 Nokia Corporation Company Confidential Page 6-1
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation Table of Contents Page No Introduction to NMM-3 troubleshooting .............................................................................. 3 General guidelines for NMM-3 troubleshooting ................................................................. 3 Tools needed for troubleshooting .............................................................................. 3 General guidelines ........................................
Company Confidential CCS Technical Documentation NMM-3 6-Troubleshooting Introduction to NMM-3 Troubleshooting This document is intend to be a guide for localizing and repairing electrical faults in the NMM-3 device. First there is a brief guide for fault localizing. Then fault repairing is divided into troubleshooting paths. Before any service operation you must be familiar with the NMM-3 product and module level architecture.
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation Mechanical damages? Solder joints OK? Continue with specific trouble shooting procedure for the module: If there is an obvious fault, repair it before reflashing the device Flash first if a fault is not obvious If flashing is not working go to flashing trouble shooting Due to CSP packages short circuits or broken solder joints are not easily seen.
Company Confidential NMM-3 6-Troubleshooting CCS Technical Documentation Diagnostics Phone is Dead Start Is phone current 0 mA? Will the phone power-up in Test or Local mode? Yes No Check X200 (contact and solder joints). OK? Yes Replace R204 No Are VFLASH1 and VIO enabled momentarily at power up? Yes No Replace UEME D200 Yes With the phone in LOCAL mode, using Phoenix check battery voltage, recalibrate if necessary. Check RF-CLK at both sides of C300. Is it 19.
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation Flash Programming Fault Start Is the FBUS TXline HIGH after startup? Measure BSIpulse during flash operation. OK? No No Check BSI circuit including X200, R204, R209, R214 and C226. OK? Yes Measure FBUS TX-line during flashing. Is it ~1.8V? Yes No Check R403, if OK replace UEME D200.
Company Confidential CCS Technical Documentation NMM-3 6-Troubleshooting SIM Card Fault (Insert SIM / Card Rejected) Start Check SIM connector makes good contact to SIM X405. OK? No Replace SIM connector X405 Yes Set phone to LOCAL mode. Is it OK? No Check BSI circuit including X200, R204, R209, R214 and C226. If OK replace UEME No Measure FBUS TX-line during flashing. Is it ~1.8V? No Check SIM lines, if OK replace UEME D200. Yes Measure VSIM Voltage on C405. Is it ~3.
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation Keypad Fault Start Is the power key working? No Measure voltage on S400 is it high? No Check R432, R40 and R439 and line, if OK, replace UEME. Yes Measure Voltage on S400 when pressed. Is it high? Yes Is the volume up key working? No Yes Check S400 is OK? No No Phone is dead Replace S400 Measure ROW5 line from S402. Is it ~1.8V? No Yes Phone is dead Check S402, R400 and R438, if it still fails replace TIKU D300.
Company Confidential CCS Technical Documentation NMM-3 6-Troubleshooting Continue Are the UImodule keys working? No Replace the UImodule. Are keys working now? Yes Retest the faulty UI-module. No Replace X400 No Check X400 solder joints and spring contacts. OK? Yes Measure ROW0 – ROW5 lines from X400. Are voltage levels ~1.8V? No Yes Measure SLEEPX signal on testpoint J301 when a key is pressed. Is voltage level ~1.8V? No Check ROW0 – ROW5 lines from X400. If OK replace TIKU.
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation Display Fault Start Replace display module. Does the display now work? Yes Replace display module. No Check X400 and UI connector X3 contacts and solder joints. OK? No Replace defective part. Yes Measure VIO (1.8V) and VFLASH1 (2.7V) at X3. are they OK? No Check continuity of VIO and VFLASH1, and No Replace TIKU D300. Yes Check for activity on data, address, and WRX lines and the RESX line on power up.
Company Confidential NMM-3 6-Troubleshooting CCS Technical Documentation Illumination Fault Start Are the display LED’s working? No Replace display module. Do lights work? Replace Display Yes No Measure voltage on V400 Cathode. Check X400 and X3 contacts and solder joints. OK? ~18V No Replace defective part. Yes Yes ~0V Check V400 and L400. Are they OK? Replace defective part. No Yes Are the keypad LED’s working? No Replace N400 Replace N400 Replace UI-module.
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation Charger Fault Start Is charger rejected when connected. No Check X402, F400, L402, V403, C410, R200 and C411. OK? Yes Use Phoenix to read BTEMP. ~Ambient? Yes No Replace UEME D200. Yes No Check BTEMP circuit including X210, R211 and C227. OK? Replace defective part. Yes No Replace defective part. Using Phoenix with the JBV-1 recalibrate battery voltage and charger current and voltage.
Company Confidential NMM-3 6-Troubleshooting CCS Technical Documentation Accessory Fault Start Check system connector X401 contacts and solder joints. OK? Repair or replace system connector. No Yes Non ACI-Accessory Measure ACI line (pin 3). Is it ~0V? No ACI-Accessory Check ACI line, L4??, R429, R409. If faulty, replace defective part and retest. No Look for activiy on the ACI line on initial accessory connection. Yes Measure VOUT (pin4) Is it ~2.8V? No Check L4?? and R409.
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation Audio Fault Start Downlink Does hands free work? No Is the problem with the Uplink or Downlink? TIKU or UEME Fault Uplink No Measure MIC Bias voltage across R104, is it ~2.1V? Yes Yes Check contacts and solder joints of UI connector X400 and earpiece connector, replace earpiece if necessary. OK? No Replace defective part Check Microphone and contacts, R103, R104, R105, C103, C104 and L102 replace defective part.
Company Confidential CCS Technical Documentation NMM-3 6-Troubleshooting Camera Fault Start Is ‘Operation Failed’ message returned when the camera is selected? No Replace camera module. Yes Check camera module is fitted correctly and contacts are OK? No Replace or refit camera module. No Replace regulator N102 No Replace TIKU D300 Yes In view finder mode, check VOUT on N102 is ~1.8V Yes In view finder mode, check for activity on signal and clock lines. Yes Replace camera module.
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation USB Fault Start Connect a USB device to phone and check N401 Vpu goes to 3.3V. No Check VCC for ~5V No Check R442, L411, C414 and X401. Replace if defective. No Replace TIKU Yes Yes Is there any activity on D+ and D-? Yes No Check R423, R424, R410, R413 and X410. OK? Yes No Replace defective part. Replace N401.
Company Confidential NMM-3 6-Troubleshooting CCS Technical Documentation GSM900/1800 TX Troubleshooting Phoenix Settings: Band = GSM900/GSM1800 Active Unit = Tx Op Mode = Burst Tx Chan = 37 GSM900 Pwr Lvl = 5 Tx Chan = 700 GSM1800 Pwr Lvl = 0 PA Mode = Free Tx Data Type = Random Tx OK Yes Yes Check output signal level Yes from antenna conncetor +32.5dBm @ 897.4MHz (GSM900) +29.5dBm @ 1747.
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation HELGO Troubleshooting Phoenix Settings: Band=GSM900 Active Unit=Tx Op Mode=Burst Tx Chan=37 PA Mode=Free Pwr Lvl=19 Yes Check with scope/multimeter TXI/TXQ Signals VR2,VR3,VR4,VR5,=2.8V VR1A=4.8V VREF01=1.35V HELGO serial interface HELGA TXP & TXC signals OK? No Baseband Troubleshooting Yes Check with RF FET Probe: VCO Output signal 3589.6Mhz CH37 (GSM900) 3495.
Company Confidential NMM-3 6-Troubleshooting CCS Technical Documentation PA and Antenna Switch Troubleshooting Check with RF probe +4dBm 900MHz -4dBm 1800MHz OK ? Yes Yes Check with oscilloscope: Check Ant Switch GSM VANT-2 = 2.6V pulse GSM VANT-1 = 2.6V pulse OK ? Yes Replace ant. switch No Check with oscilloscope: VBatt = 3.8V VCC1 = VCC2 = VCC3 = 3.8V VTXLO-G= 2.8V pulse (0V GSM1800) VTXB-G= 2.8V pulsed (0V GSM1800) VTXB-D= 2.
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation GSM900 RX Troubleshooting Phoenix Settings: Band:GSM900 Active unit:RX Op Mode:Continuous Rx/Tx Chan:37 AGC:maximum (default) Apply a –85dBm 942.46771MHz signal from generator to RF connector Check C575 & RF connector Yes Scope at GRXI/GRXQ Signal 1.3Vpp DC Offset=1.2V Freq=67.7KHz No No Yes Spectrum analyser VCO output 3769.
Company Confidential NMM-3 6-Troubleshooting CCS Technical Documentation GSM1800 RX Troubleshooting Phoenix Settings: Band:GSM1800 Active unit:RX Op Mode:Continuous Rx/Tx Chan:700 AGC:maximum (default) Yes Apply a –85dBm 1842.86771MHz signal from generator to RF connector Check C575 & RF connector Yes Scope at GRXI/GRXQ Signal 1.3Vpp DC Offset=1.2V Freq=67.7KHz No No Yes Spectrum analyser VCO Output 3685.
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation GSM900/1800 Synthesizer Troubleshooting Pheonix Settings: Band:GSM900/1800 Active unit:RX Op Mode:Continuous Rx Chan:37/700 AGC:maximum (default) Yes Probe VCO o/p 3769.6MHz GSM900 3685.6MHz GSM1800 Span 1MHz RF Level=-10dBm Yes Synth OK No VCO output signal <-10dBm? Yes Check Balun output & VCO solder joints No Replace faulty components OK? Yes No Check output signal on 1GHz Span.
Company Confidential CCS Technical Documentation NMM-3 6-Troubleshooting WCDMA Tx Troubleshooting WCDMA Measurement settings: RBW=30khz VBW=300khz, detector:sample, CSP=5MHz,CBW=3.
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation PA and DC-DC Converter Troubleshooting Replace faulty components No Yes Check with RF probe Signal level at PA input -3dBm? Yes Yes Check Ireg voltage (C980)1.3v? No No Check components around detector circuit OK Check R965 & R967 OK? No Check components around DC-DC converter OK? Yes Replace DC-DC converter Replace Faulty component Yes Yes Check VREG=2.8v Check detector voltage (C960) 0.6v
Company Confidential NMM-3 6-Troubleshooting CCS Technical Documentation WCDMA Rx Troubleshooting Phoenix Settings: Settings: Phoenix Rx Control (WCDMA) Rx Contol (WCDMA) AGC mode = Manual AGC mode =Manual AFC algorithm = Off AFC algorithm=Off Channel = 10700 (2140MHz) Channel=10700 BB AGC = 33dB (2140MHz) Click ClickSEND SEND Yes Apply a –48dBm 2141MHz CW signal from generator to WCDMA RF connector Yes Scope probe on RXI/RXQ lines R844/R845 400mVpp DC offset 700mV FET Probe R845/R845 Freq=1MHz RF Leve
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation WCDMA Rx Synthesizer Troubleshooting Phoenix Settings: Rx Contol (WCDMA) AGC mode = Manual AFC algorithm= Off Channel= 10700 (2140MHz) Click SEND Yes Probe VCO output 4280MHz Span 1MHz RF Level= -17dBm Yes Synth OK No VCO o/p signal <-17dBm? Yes Check balun output & VCO solder joints No Replace faulty components OK? Yes No Replace VCO Check output signal on 1GHz Span.
Company Confidential NMM-3 6-Troubleshooting CCS Technical Documentation WCDMA Tx Synthesizer Troubleshooting Phoenix Settings: Tx Contol (WCDMA) Algorithm mode Start Level = 0dBm Channel= 9750 (1950MHz) Click SEND Probe VCO o/p 3900Mhz Span 1MHz RF Level= -17dBm Yes Synth OK No VCO o/p signal <-17dBm? Yes Check balun output & VCO solder joints No Replace faulty components OK? Yes No Replace VCO Check o/p signal on 1GHz Span. Signal found on correct frequency? Yes Check Vcc= 2.
NMM-3 6-Troubleshooting Company Confidential CCS Technical Documentation GSM/WCDMA Antenna Troubleshooting Phone in mechanics with C (battery) and D (antenna) covers removed Replace WCDMA antenna Yes Antenna spring contacts OK? No NO WCDMA Ground antenna connection With multimeter check GSM & WCDMA antennas make ground connection with battery connector ground OK? Replace faulty contacts Yes Replace antenna module NO GSM ground antenna connection GSM & WCDMA antenna OK Test Points Signal Ref Te
Company Confidential CCS Technical Documentation Signal Ref Test point Function Characteristic FBUSTX 401 J400 Pin 2 MBUS 402 J400 Pin 7 COL2 COL1 COL0 ROW5 +VLCDLED 403 404 405 406 407 -VLCLED KLIGHT DLIGHT 1KEYLED 408 409 410 411 R435 R436 R437 R438 V400 Cathode R408 N402 Pin 2 N400 Pin 8 R426 SIMDATA SIMCLK SIMRST HOOKINT 412 413 414 415 X403 Pin 6 X403 Pin 1 X403 Pin 2 J407 ACI 416 C425 VBUS 417 C422 Vreg D+ DXMICN 418 419 420 421 XMICP 422 L403 External microphone posi- 2.
NMM-3 6-Troubleshooting Signal Ref Test point FBUSRXI 302 J313 FBUSTXI 303 J314 MBUSRX MBUSTX 304 J315 305 J316 OSCIN OSCOUT 200 C211 201 C210 VBAT BSI 202 J202 203 J203 BTEMP 204 R211 VTIKU VANA 205 C203 206 C208 VFLASH1 VAUX2 VCORE VIO VSIM 207 208 209 210 211 PAOUTP 212 R227 PAOUTN 213 R228 VIBRA 214 X207 VR1A VR1B VR2 VR3 VR4 VR5 VR6 VR7 SMPSCLK 215 216 217 218 219 220 221 222 223 Page 6-30 C208 C207 C207 C206 C206 C241 C236 C234 C235 C233 C235 C234 C233 J201 Company Confide
Company Confidential NMM-3 6-Troubleshooting CCS Technical Documentation Calibration required when components changed Table 1: Baseband Components Component ID NMP Code D200 4370945 Description Calibration required UEME V2.
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