Customer Care Solutions RM-37 Series Transceivers 6-Troubleshooting Instructions Issue 1 04/2004 ©Nokia Corporation
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation [This page left intentionally blank] Page 2 ©Nokia Corporation.
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions Table of Contents Page No RF Troubleshooting .......................................................................................................4 Introduction to RF troubleshooting .............................................................................4 RF Key component placement .....................................................................................5 RF Measurement points ........................
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation 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 (HELGA N500). For easier troubleshooting, this RF troubleshooting document is divided in to sections.
Company confidential RM-37 6-Troubleshooting Instructions CCS Technical Documentation RF Key component placement Figure 1: Component placement 1 GSM 1900 rx saw Antenna switch PA GSM900tx Balanced saw GSM 1900 rx balun Helga VCO VCTCXO VCO balun Issue 1 04/2004 ©Nokia Corporation.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation RF Measurement points Figure 2: Component placement 2 RX-saw-out LNA-P VBATT to antenna VANT-2 ASM-out-1900RX LNA-VCC VANT-1 ASM-in VANT-3 1800-1900PA-in VTXB-1800-1900 PCRTL-1800-1900 VPCTRL-900 VTXB-900 900PA-in 1800RX-in VR2 1900RX-in 900RX-in RFBusEn RFBusClk RFBusRes RFBusData VR7 VR6 VR4 TXC VR5 VR3 VCTCXO 26MHz out TXQP VR1 TXIN TXQN TXIP Page 6 ©Nokia Corporation.
Company confidential RM-37 6-Troubleshooting Instructions CCS Technical Documentation GSM900 & GSM1800 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.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation - Set Rx/Tx channel to 37 on GSM900 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 GSM900 or to 0 (Default = 15) on GSM1800 or GSM1900 Page 8 ©Nokia Corporation.
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions Transmitter troubleshooting diagram Figure 3: Transmitter troubleshooting Transmitter troubleshooting diagram TX troubleshooting TX OK Yes Check output signal level: +32...+33dBm @897.4 MHz (GSM900) Yes +29...+30dBm @1747.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Figure 4: HELGA IC troubleshooting HELGA troubleshooting Check with oscilloscope: -TXI/TXQ signals -VR1, VR2, VR4, VR5, VR6 = 2.8V -VrefRF01 = 1.35 V -HELGA serial interface -TXP & TXC signals OK ? Check with RF probe: -4G VCO out signal - 3589.6 MHz (GSM900) -3495.
Company confidential RM-37 6-Troubleshooting Instructions CCS Technical Documentation Figure 5: PA and Antenna Switch troubleshooting PA & ant switch troubleshooting Yes *(When 1kOhm passive probe is used, correct the measurement by +26dB Check with RF probe signal level on PA input >=0dBm (* OK ? Yes Yes Check with oscilloscope: -VANT_1 (GSM900) -VANT_2 (GSM1800) -VANT_3 (GSM1900) Replace ant. switch OK ? No Check with oscilloscope: -VBATT ~4V - VTXB = 2.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Pictures of transmitter signals Figure 6: Transmitter signals TXI VPC 200mV/div 100us/div 200mV/div 1 VPCTRL _900 power level high at R703/C703 VPCTRL_1800/1900 power level high at R704/C704_ 100us/div TX I/Q at R516/517 power level high Random data 1 500mV/div 500mV/div 100us/div VANT_1 / GSM900 TX at C804 VANT_2 / GSM1800 TX at R808 VANT_3 / GSM1900 TX at C805 OV ( no signal/ Flatline on Oscilloscope screen
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions Figure 7: TX OUT signal G S MP O W REF 4 1 . 0 1 0 d B/ d Bm ATT 4 0 T u e Se p 2 5 1 3 : 4 8 : 5 9 2 0 0 1 A_ wr i t eB_ b l a n k d B REF OF S 11. 0 dB RBW 1 0 0 VBW 1 0 0 S WP 2 . 0 k Hz k Hz s CENT ER 8 9 7 . 4 0 0 MH z SPAN 2 . 0 0 0 MH z Tx out signal, 900 band, burst mode, channel 37 Issue 1 04/2004 ©Nokia Corporation.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation GSM900, 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).
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions - Set Rx/Tx channel to 37 on GSM900 band, 700 on GSM1800 band or 661 on GSM1900 (Defaults) Apply 942.46771 MHz (channel 37 + 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).
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation 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 9: GSM1900 RX I or Q signal (trace2), burst mode. For Figure 9, “GSM1900 RX I or Q signal (trace2), burst mode.,” on page 16 GSM1900 receiver burst mode I or Q signal at ch 661 with input signal 1960.067MHz, level –90 dBm at RF-connector.
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions Figure 10: RX I&Q, phase difference 90 deg between signals. Figure 10, “RX I&Q, phase difference 90 deg between signals.,” on page 17: Detailed view of GSM900 continuous mode RX I and Q signals measured from testpoints RXI and RXQ simultaneously. Used channel 37, input signal 942.467 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.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Troubleshooting diagram for GSM900 receiver Phone in “Continuous” mode, AGC setting “12” Figure 11: GSM900 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.
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions Troubleshooting diagram for GSM1800 receiver Phone in “Continuous” mode, AGC setting “12 Figure 12: GSM1800 receiver troubleshooting Apply –90dBm 1842.86771MHz signal from generator to antenna connector Yes No Oscilloscope at RX_I Signal 140mVpp DC offset 1.35V *** Frequency 67.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Troubleshooting diagram for GSM1900 receiver Phone in “Continuous” mode, AGC setting “12 Figure 13: 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.
Company confidential RM-37 6-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.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Synthesizer troubleshooting diagram Figure 14: 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.
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions Pictures of synthesizer signals Figure 15: 26MHz at G501 pin out Figure 16: 26MHz RFCLK at R420/C420 Figure 17: 1800 TX, channel 512, burst mode Issue 1 04/2004 ©Nokia Corporation.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Figure 18: 1900 RX, channel 810, continuous mode Figure 19: 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_viewB_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 Page 24 CENTER 3. 685600 GHz ©Nokia Corporation. SPAN 1.
Company confidential RM-37 6-Troubleshooting Instructions CCS Technical Documentation Baseband troubleshooting The following diagrams describe baseband troubleshooting. Main Troubleshooting Diagram Figure 20: Baseband general troubleshooting Issue 1 04/2004 ©Nokia Corporation.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Phone is dead Figure 21: 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.
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions Flash Programming Fault Figure 22: 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.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Phone is jammed Figure 23: Jammed phone troubleshooting Start Measure VIO, VCORE, VFLASH1,VANA, VR3 voltages. Are they OK? No No Measure Sleep Clk from B200. Is it OK? Yes Measure 26MHz RFClk from R420. Is it OK? No Check BSI/BTEMP-lines. If OK, UEM regulators are not working. Change UEM. No Check B200, C209 and C210 Yes Change UEM Measure 26MHZ RFClk from G501.
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions SIM card fault (Insert SIM / Card rejected) Figure 24: SIM card troubleshooting Start Insert SIMor Card rejected fault? Yes 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. Set phone to LOCAL mode.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Keypad Fault Figure 25: 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 Change S302 Phone is jammed Is the volume UP key working? No Measure ROW0 line from S300. Is it ~1.
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions Figure 26: 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.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Display Fault Figure 27: 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.
Company confidential RM-37 6-Troubleshooting Instructions CCS Technical Documentation Illumination fault Figure 28: 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.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Charger Fault Figure 29: 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.
Company confidential RM-37 6-Troubleshooting Instructions CCS Technical Documentation Accessory Fault Figure 30: Accessory troubleshooting Start Is accessory detected when connected to system connector? Yes No Check system connector X101 (solder ings, contact plates). Is it OK? No Repair solderings or check contact plates if dirty. Retest. Yes ACI-Accessory Measure ACI-line (pin3). Is it ~0.83...1.13V? Check ACI- line (L106,R103,R102,R109,C103). No If not OK, change defect part and retest.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Camera Troubleshooting Figure 31: Component placement Figure 32: Trace layout Page 36 ©Nokia Corporation.
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions Camera Fault Figure 33: Camera troubleshooting diagram Issue 1 04/2004 ©Nokia Corporation.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Audio Fault Figure 34: Audio troubleshooting Start Is earpiece working? No Try to change earpiece. Is it working now? Yes Retest earpiece No Yes Set phone in LOCAL mode. Use Phoenix audio test. Set EXT IN, HP OUT, LOOP ON Measure DC offset voltage from earpiece pads. Is it ~1.38V? No Check L150, C155, R151, R152 and lines. If OK, change UEM. No Check L102, C116, R150, C159, R153, C150 and line.
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions FM Radio troubleshooting FM Radio component layout Figure 35: Component placement Figure 36: Trace layout. Issue 1 04/2004 ©Nokia Corporation.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Figure 37: 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. Page 40 ©Nokia Corporation.
Company confidential RM-37 6-Troubleshooting Instructions CCS Technical Documentation FM Radio troubleshooting diagram Notes to "FM Radio troubleshooting diagram" Use 1MHz 1X probe when measuring Audio and clock signals with oscilloscope. Use active RF probe when measuring frequencies with spectrum analyzer. Note 1. RF test signal parameters: - Amplitude, A, –67.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Figure 38: 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 ? NO Measure voltages from pins 7 and 34, is it –2.7 V ? Retest starting. Start OK now ? NO YES Check N356 solders (pins 5,6,7,8,9,11, 12,13,17,33,34,35, 36, 37.
CCS Technical Documentation Company confidential RM-37 6-Troubleshooting Instructions Diagrams of FM radio signals Figure 39: 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 signal Issue 1 04/2004 ©Nokia Corporation.
RM-37 Company confidential 6-Troubleshooting Instructions CCS Technical Documentation Figure 40: FM radio clock from test point J359, 32 kHz frequency clock signal, when radio is on. 15:51:49 03 JUL 2002 REF -20.0 dBm MKR 97.9280 MHz -71.03 dBm #AT 0 dB PEAK LOG 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.
