Customer Care Solutions NPL-3 Series Transceivers Troubleshooting Instructions Issue 1 3/03 ãNokia Corporation
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Table of Contents Page No RF Troubleshooting .......................................................................................................3 Introduction to RF troubleshooting .............................................................................3 RF Key component placement .....................................................................................4 RF Measurement points ..........................
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions RF Troubleshooting Introduction to RF troubleshooting Measurements should be done using Spectrum analyzer with high-frequency highimpedance passive probe (LO-/reference frequencies and RF power levels) and Oscilloscope with a 10:1 probe (DC-voltages and low frequency signals). The RF-section is build around one RF-ASIC (HELGO N500). For easier troubleshooting, this RF troubleshooting document is divided into sections.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation RF Key component placement Figure 1: Component placement 1 GSM850_TX Balanced saw Antenna switch GSM1900_RX saw PA GSM1800/1900 TX Balun GSM1900 LNA GSM1900_RX balun Helgo VCO VCTCXO VCO balun Page 4 ãNokia Corporation.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions RF Measurement points Figure 2: Component placement 2 Iref_850 Mode VTXLO_850 ASM_In_TX850 Iref_1800/1900 VANT_1 VANT_2 To antenna ASM_In_TX1800_1900 850PA_IN ASM_out_850RX ASM_out_1800RX VTXB850 ASM_out_1900RX VPCTRL_850 VANT_3 VPCTRL_1800_1900 RX_saw_out VTXB_1800_1900 VBATT 1800_1900PA_IN LNA_VCC LNA_P VPECTRL3 (ALC) ALC 1900_RX_In VR2 1800_RX_In RFBusReset 850_RX_In VR4 RFBusData VR7 RFBusEn
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation GSM850, GSM1800 & GSM1900 Transmitter General instructions for Tx troubleshooting Kindly refer to the Service Software Section, Service Concept dagram (p.40) Connect test jig to computer with DAU-9S cable or to FPS-8 Flash Prommer with XCS-4 modular cable. Make sure that you have PKD-1 dongle connected to computers parallel port. Connect DC power supply to module test jig with FLC-2 cable.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions - Set Rx/Tx channel to 190 on GSM850 band or 700 on GSM1800 band or 661 on GSM1900 (Defaults) - Set Tx PA mode to "Free" (Default) - Set power level to 5 (Default = 19) on GSM850 or to 0 (Default = 15) on GSM1800 or GSM1900 Issue 1 3/03 ãNokia Corporation.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Transmitter troubleshooting diagram Figure 3: Transmitter troubleshooting Page 8 ãNokia Corporation.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Figure 4: HELGO IC troubleshooting Issue 1 3/03 ãNokia Corporation.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Figure 5: PA and Antenna Switch troubleshooting Page 10 ãNokia Corporation.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Pictures of transmitter signals Figure 6: Transmitter signals TXI VPC 1 200mV/div 100us/div 200mV/div VPCTRL _850 power level high at R703/C703 VPCTRL_1800/1900 power level high at R704/C704_ TX I/Q at R516/517 power level high Random data 1 500mV/div VTXB_850 at C713 VTXB_1800_1900 at C714 100us/div VANT_1,VANT_2,VANT_3 500mV/div 500mV/div 100us/div Issue 1 3/03 500mV/div 100us/div VANT_1 / GSM850 TX at C
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Figure 7: Tx out signal, 850 band, burst mode, channel 190 Page 12 ãNokia Corporation.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Additional information for EDGE troubleshooting EDGE mode troubleshooting differs slightly from basic GSM troubleshooting. Establish connection to the phone normally (see GSM850/1800/1900 troubleshooting instructions).
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Figure 8: Transmitter EDGE troubleshooting Page 14 ãNokia Corporation.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Figure 9: Helgo EDGE troubleshooting Issue 1 3/03 ãNokia Corporation.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Figure 10: Pa & ant switch EDGE troubleshooting Page 16 ãNokia Corporation.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Pictures of EDGE transmitter signals Figure 11: I_ref_850 power level 8 at R701/C701 Figure 12: VTXB 850 power level 8 at C713 Issue 1 3/03 ãNokia Corporation.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Figure 13: I_ref_1800/1900 power level 2 at R700/C700 Figure 14: VTXB 1800/1900 power level 2 at C714 Page 18 ãNokia Corporation.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Figure 15: TXA 850/1800/1900 at C538 Figure 16: TXI/TXQ signal at C535/C536/R516/R517 Issue 1 3/03 ãNokia Corporation.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Figure 17: VPECTRL3 (ALC) signal at C512 Page 20 ãNokia Corporation.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions GSM850, GSM1800 and GSM1900 Receiver General instructions for Rx troubleshooting Connect test jig to computer with DAU-9S cable or to FPS-8 Flash Prommer with XCS-4 modular cable. Make sure that you have PKD-1 dongle connected to computers parallel port. Connect DC power supply to module test jig with FLC-2 cable. Set the DC supply voltage to 6V (test jig has internal voltage regulator of output voltage 4V).
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation - Set Rx/Tx channel to 190 on GSM850 band, 700 on GSM1800 band or 661 on GSM1900 (Defaults) Apply 881.6671 MHz (channel 190 + 67.710 kHz offset), 1842.86771 MHz (channel 700 + 67.710 kHz offset) or 1960.06771 MHz (channel 661 + 67.71 kHz) –90 dBm signal to the RF-connector (remember to compensate for cable attenuation).
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions DC level of signal part is 1.35V. DC level can variate about +/-100mV between I and Q signals and between different bands as well. Figure 19: GSM1900 RX I or Q signal (trace2), burst mode. For Figure 19, “GSM1900 RX I or Q signal (trace2), burst mode.,” on page 23 GSM1900 receiver burst mode I or Q signal at ch 661 with input signal 1960.067MHz, level –90 dBm at RF-connector.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Figure 20: RX I&Q, phase difference 90 deg between signals. Figure 20, “RX I&Q, phase difference 90 deg between signals.,” on page 24: Detailed view of GSM850 continuous mode RX I and Q signals measured from testpoints RXI and RXQ simultaneously. Used channel 190, input signal 881.6671 MHz, level –90 dBm at antenna port, AGC setting 12. Phase difference should be 90 degrees between RX I and Q signals at all bands.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Troubleshooting diagram for GSM850 receiver Phone in “Continuous” mode, AGC setting “12” Figure 21: GSM850 receiver troubleshooting Apply –90dBm 942.46771MHz signal from generator to antenna connector Yes Oscilloscope at RX_I Signal 700mVpp DC offset 1.35V*** Frequency 67.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Troubleshooting diagram for GSM1800 receiver Phone in “Continuous” mode, AGC setting “12 Figure 22: GSM1800 receiver troubleshooting Apply –90dBm 1842.86771MHz signal from generator to antenna connector Yes Oscilloscope at RX_I Signal 140mVpp DC offset 1.35V *** Frequency 67.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Troubleshooting diagram for GSM1900 receiver Phone in “Continuous” mode, AGC setting “12 Figure 23: GSM1900 receiver troubleshooting Apply –90dBm 1842.86771MHz signal from generator to antenna connector Yes No Oscilloscope at RX_I /RXQ Signal 160mVpp DC offset 1.35V *** Frequency 67.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Synthesizer General instructions for synthesizer troubleshooting Connect test jig to computer with DAU9S cable or to FPS-8 Flash Prommer with XCS-4 modular cable. Make sure that you have PKD-1 dongle connected to computers parallel port. Connect DC power supply or FPS-8 to module test jig with PCS-1 cable. Set the DC supply voltage to 3.9V and set the jumper connector on test jig to "bypass" position.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Figure 24: Synthesizer troubleshooting diagram Synthesizer troubleshooting Yes *(When 2.5kOhm passive probe is used, correct the measurement by +34 dB Set with RF controls: Active Unti = Rx Operation mode = Continuous Yes Synthesizer OK Check with RF probe: -4G VCO out signal - 3589.6 MHz (GSM900) -3495.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Pictures of synthesizer signals Figure 25: 26MHz at G501 pin out Figure 26: 26MHz RFCLK at R420/C420 Figure 27: 1800 TX, channel 512, burst mode Page 30 ãNokia Corporation.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Figure 28: 1900 RX, channel 810, continuous mode Figure 29: VCO output, 1800 band, RX on, continuous output REF 4. 0 dBm 10dB/ W ed Aug 21 21:23:21 2002 ATT 10 dB A_vi ewB_blank MARKER 3. 685604 GHz - 3. 97 dBm SPAN 1. 000 MHz REF OFS 34.0 dB RBW 10 kHz VBW 10 kHz SWP 50 ms Issue 1 3/03 CENTER 3. 685600 GHz ãNokia Corporation. SPAN 1.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Baseband troubleshooting Figure 30: Basic baseband test points RFCLK (R420, C420) VrefRF01 (C231)VR5 (C226) VR3 (C227) VLED+ (R307) J154 DATA (UPP- VR7 (C224) VR2 (C223) J418 FLS2CSX (UPP->FLASH) VR4 (C222) VR6 (C225) J417 EXTRDX (UPPJ419 FLSCLK (UPPJ416 EXTWRX (UPPJ414 DBUSDA (UPP<>UEM) J420 FLSCSX (UPP) J402 PURX (UEM->UPP) J404 SLEEPCLK (UEM->UPP) J407 CBUSDA (UPP<>UEM) J408 CBUSENX (UPP->UEM) J409 MBUSTX (UPP->UE
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions The following diagrams describe baseband troubleshooting.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Phone is dead Figure 32: Dead phone troubleshooting Start Is phone current 0 mA? Yes Check X100 (contacts, solderings). Is it OK? No Change X100 No Change defect ones Yes Check L260 L265 and C260 C265.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Flash Programming Fault Figure 33: Flash programming troubleshooting Start Is the FBUS TX-line HIGH after startup? Measure BSI-pulse during Flash operation. Is it OK? No No Check BSI-line including X100,C100,C240,R202 and R206. Yes Yes Measure FBUSTX-line during Flash operation (J411). Is it ~1.8V?. Yes Is FBUSTX-line set to LOW after it has been HIGH? No Check R104.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Phone is jammed Figure 34: Jammed phone troubleshooting (1) Phone is jammed Measure VIO, VCORE, VFLASH1, VANA, VR3 voltages. Are they OK ? No Measure 32kHz SleepClk from testpoint J404. No Is it OK ? No Yes Yes No Yes Measure PURX signal from testpoint J402. Is it HIGH (~1.8V) ? Measure 32kHz SleepClkfrom B200. Is it OK ? Measure 26MHz RFCLK from G501.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Figure 35: Jammed phone troubleshooting (2) Phone is jammed 2 Phone Shutdown after 30s Yes Measure watchdog signal CBUSDA from J414. Is it OK ? No Change UPP Yes No Retest Measure CBUSClk 1MHz signal from testpoint J406. Is it OK ? No Yes Read phone info. Is it OK ? Yes No Measure FBUSRx signal during phone info read from testpoint J412.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation SIM card fault (Insert SIM / Card rejected) Figure 36: SIM card troubleshooting Start Insert SIMor Card rejected fault? Yes Set phone to LOCAL mode. Is it OK? No Check BSI-line including X100,C100,C240,R202 and R206. If OK, change UEM. No Check VSIM-line (X386,C390,R386,C203). If OK, change R388. If still fail, change UEM. No Check SIM lines (X386). If OK, change R388. If still fail, change UEM.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Keypad Fault Figure 37: Keypad troubleshooting (1) Start Is the power key working? No Measure voltage from S302. Is it HIGH? No Check R306,C310,S30 2 and line. If OK, change UEM Yes Measure voltage from S302 when Yes pressed. Is it HIGH? Yes Check S302. Is it OK? Yes Phone is dead No No Phone is jammed Is the volume UP key working? No Measure ROW0 line from S300. Is it ~1.8V? No Check S300 and line.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Figure 38: Keypad troubleshooting (2) Continue Is the UI-module keys working? No Try to change UI PWB. Are the keys working now? Retest failing UI-module Yes No Check X301 (solder joints and spring contacts). Is it OK? Change X301 No Yes Measure ROW0 - Row4 lines from X301. Are voltage level ~1.8V? No Yes Measure SLEEPX-signal from testpoint J403 when key is pressed. Is voltage level ~1.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Display Fault Figure 39: Display troubleshooting Start Does the display start? No Try to change UI-module. Is the display working now? Yes Retest failing UI-module No Yes Check X302 (solder joints). Is it OK? No Change X302 Yes Measure VDD (2.7V) and VDDI (1.8V). Are they OK? No Check X302 and lines again. If OK, change UEM No Check X302 and lines again. If OK, change UPP No Check X302, R308,R309 and lines.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Illumination fault Figure 40: Backlight troubleshooting Start Are the display LED's working? No Try to change display. Are the LED's working now? Yes Retest failing display No Yes Check X302 (solder joints). Is it OK? No Change X302 Yes Are the keyboard LED's working? No Measure VLED+ and VLED-. VLED+ = ~7.5V and VLED= ~0.5V when LED driver is enabled.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Charger Fault Figure 41: Charging troubleshooting Start Battery bars are working (scroll) Yes Retest No Measure voltage over V100 (TVS). Is it > 3.0V? Check X102, F100, L100, V100, C106, C110 and line. No Change defect part (if any), re-calibrate charge current/voltage. Retest. Yes Read BTEMP value. Compare it to ambient temperature. Is it ~25C? No Check X100, C100, R202, R207, C220 and line.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Accessory Fault Figure 42: Accessory troubleshooting Start Is accessory detected when connected to system connector? Yes No Check system connector X101 (solder ings, contact plates). Is it OK? Repair solderings or check contact plates if dirty. Retest. No Yes ACI-Accessory Measure ACI-line (pin3). Is it ~0.83...1.13V? No Check ACI- line (L106,R103,R102,R109,C103). If not OK, change defect part and retest.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Audio Fault Figure 43: Audio troubleshooting (1) Audio faults Is earpiece working ? Yes No Try to change UI- module. Is it working now ? Check earpiece contact springs from old UI-module and change earpiece and foam to old UImodule. Retest. Yes No Change old UI -module back.Set phone to LOCAL mode. Using Phoenix Audiotest set EXT IN, HP OUT, LOOP ON Measure DCoffset voltage between earpiece pads J310/J311 and GND.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Figure 44: Audio troubleshooting (2) Earpiece 2 Connect EXT audio signal 1kHz (sine, 200mVpp) between XMICP and XMICN pads (X101, 9/10) Measure sine signal from earpiece pads (J310,J311). Is It ~880mVpp ? Yes No Measure sine signal to UEM (R155). Is it ~130mVpp ? No Yes Check C154. If OK change UEM Check C154, R155, C156, R154, C159, R158, R159 and lines. Change UPP Retest Page 46 ãNokia Corporation.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Figure 45: Audio troubleshooting (3) Audio faults 2 Is microphone working ? Yes No Try to change new UI-module. Is it working Yes now ? No Check mic contact springs from old UI module. If not OK replace microphone in old UI module with new one. Retest. Restore old UI module. Set phone to LOCAL mode. Using Phoenix Audiotest set HP IN, EXT OUT, LOOP ON Measure MICB1voltage from MICP pad. Is it ~2.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Figure 46: Audio troubleshooting (4) Audio faults 3 IHF speaker working ? Try to change new Ccover assembly. Is it working now? No IHF speaker or contact springs fault. Retest. Yes Yes No END Check C160, C161, C169, C166, R163, L151, L152, C164 and IHF PA output lines. Retest. Restore old C-cover. Set phone to local mode with Phoenix. Set buzzer ON, vol "9" and freq. to 1kHz.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions FM Radio troubleshooting FM Radio component layout Figure 47: Component placement Figure 48: Trace layout. Issue 1 3/03 ãNokia Corporation.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Figure 49: FM radio block layout. Components L103, L104, L105, C107, C108, C109, C117, C162, C163, R164, R165, R166 and R167 are not shown in the picture. Those components are placed in baseband section, near audio amplifier N150. FM Radio troubleshooting diagram Notes to "FM Radio troubleshooting diagram" Use 1MHz 1X probe when measuring Audio and clock signals with oscilloscope.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Figure 50: FM radio troubleshooting diagram Set phone into local mode. Start FM radio. NO Does the radio start ? Check C374, C375, R375, R358 and measure 32kHz clock signal from J359, retest starting. Start OK ? Measure voltages from pins 7 and 34, is it –2.7 V ? Retest starting. Start OK now ? NO NO YES Check N356 solders (pins 5,6,7,8,9,11, 12,13,17,33,34,35, 36, 37.
NPL-3 Company confidential Troubleshooting Instructions CCS Technical Documentation Diagrams of FM radio signals Figure 51: Oscilloscope screen shot, Audio output Signal 1: Audio output from PWB test points J103 and J104, with FM test signal, volume 100%. Signal 2: Audio output from FM radio pins 22 and 23(same as in C162 and C163), with FM test signa Figure 52: FM radio clock from test point J359, 32 kHz frequency clock signal, when radio is on.l Page 52 ãNokia Corporation.
Company confidential CCS Technical Documentation NPL-3 Troubleshooting Instructions Figure 53: FM frequency from FM radio pin 37, the other end of L358, with FM test signal 15:51:49 03 JUL 2002 REF -20.0 dBm PEAK LOG MKR 97.9280 MHz -71.03 dBm #AT 0 dB SWEEP CONT SGL FREE RUN 10 dB/ VIDEO LINE WA SB EXTERNAL CORR SC FS SYNC CRD CENTER 98.0000 MHz #RES BW 10 kHz SPAN 300.0 kHz #SWP 1.
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