Accessory Fault ......................48 Audio Fault ........................49 Camera Troubleshooting....................53 Camera Fault ......................54 Camera troubleshooting diagram ................. 54 FM Radio troubleshooting ................... 55 FM Radio troubleshooting diagram................56 Notes to "FM Radio troubleshooting diagram"............56 Nokia Corporation. Issue 1 10/03 Page 1...
RF Troubleshooting Introduction to RF troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Measurements should be done using Spectrum analyzer with high-frequency high-impedance 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).
GSM 850, GSM900, GSM1800 & GSM1900 Transmitter General instructions for Tx troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn 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 mod- ular cable.
Transmitter troubleshooting diagram Figure 3: Transmitter troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn TX OK TX Troubleshooting Tune Check output signal level: Check TX power +32...+33dBm@836.6MHz (GSM850) +32…+33dBm@897.4MHz(GSM900) all power levels, +29…+30dBm@1747.8 and 1880MHz levels, +32...+33dBm@897.4MHz (GSM900) (GSM1800&1900) +29...+30dBm@1747.8MHz and 1880MHz (GSM1800 and 1900) Check output signal on 500MHz span...
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Figure 4: HELGO IC troubleshooting Helgo ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn troubleshooting Check with oscilloscope: -TXI/TXQ signals Baseband -VR1, VR2, VR4, VR5, VR6 =2.8V troubleshooting -VrefRF01 = 1.35V -Helgo serial interface -TXP & TXC signals Check with RF probe: 4G VCO signal output: -3589.6MHz (GSM900) Synthesizer...
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Figure 5: PA and Antenna Switch troubleshooting PA & ant switch ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn troubleshooting Check with RF probe signal level on PA Check with oscilloscope: -VANT1 (GSM850/900 input >= 0dBm -VANT1 (GSM900) Replace ant. -VANT2 (GSM1800) switch -VANT3 (GSM1900) Check with oscilloscope:...
Pictures of transmitter signals ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn 200mV/div 100us/div 200mV/div 100us/div TX I/Q at R516/517 power level high Ran- VPCTRL _850/900 power level high at R703/C703 VPCTRL_1800/1900 power level high at R704/C704 dom data 500mV/div 100us/div 500mV/div 100us/div VANT_1 / GSM850/900 TX at C805 VANT_1,VANT_2,VANT_3...
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Figure 6: Tx out signal, 900 band, burst mode, channel 37 Marker 1 [T1] 100 kHz RF Att 40 dB Ref Lvl Ref Lvl 28.46 dBm 100 kHz ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn 34 dBm 34 dBm 897.38997996 MHz Unit 21 dB Offset Center 897.4 MHz...
Additional information for EDGE troubleshooting EDGE mode troubleshooting differs slightly from basic GSM troubleshooting. ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Establish connection to the phone normally (see GSM850/900/1800/1900 troubleshooting in- structions). Select product from the menu: File -> Choose Product -> RH-30/RH-31 From toolbar set operating mode to “Local”...
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Figure 7: Transmitter EDGE troubleshooting TX OK TX EDGE Troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Tune Check output signal level: Check TX power +24...+30dBm@836.6MHz(GSM850) +24…+30dBm@897.4MHz(GSM900) all power levels, +22…+29dBm@1747.8 and 1880MHz levels, +24...30dBm@897.4MHz(GSM900) (GSM1800&1900) +22...+29dBm@1747.8and 1880MHz (GSM1800/1900) Check output signal on 500MHz span Synthesizer TX signal found?
GSM 850, GSM900, GSM1800 and GSM1900 Receiver General instructions for Rx troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Connect test jig to computer with DAU-9S cable or to FPS-8 Flash Prommer with XCS-4 mod- ular 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.
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RX I/Q signal ,burst mode, input level –90dBm. Figure 17: ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Receiver I or Q burst mode signal (channel 37) measured from testpoint RXI or RXQ with 942.46771 MHz signal, input level –90dBm at RF-connector. Correct signal amplitudes approximately: •...
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Figure 18: GSM1900 RX I or Q signal (trace2), burst mode. ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn GSM1900 receiver burst mode I or Q signal at ch 661 with input signal 1960.067MHz, level – 90 dBm at RF-connector. Trace2: With wider time scaling both monitoring and own RX bursts are seen, 1 burst (shorter) is monitoring and 2 burst (longer) is own RX burst.
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Detailed view of GSM900 continuous mode RX I and Q signals measured from testpoints RXI and RXQ simultaneously. Used channel 37, input signal 942.46771 MHz, level –90 dBm at antenna port, AGC setting 12. ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Phase difference should be 90 degrees between RX I and Q signals at all bands.
Synthesizer General instructions for synthesizer troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Connect test jig to computer with DAU-9S cable or to FPS-8 Flash Prommer with XCS-4 mod- ular 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.
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Figure 24: Synthesizer troubleshooting diagram Synthesizer ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn troubleshooting *(When 2.5kOhm passive probe is used, correct the measurement by +34 dB Set with RF controls: Active Unti = Rx Synthesizer Operation mode = Continuous Check with RF probe: -4G VCO out signal -3346.4MHz(GSM850) - 3589.6 MHz (GSM900)
Phone is dead Figure 3: Dead phone troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Check X100 Is phone current (contacts, Change X100 0 mA? solderings). Is it Check L260 - L265 and C260 - Change defect C265. Are they ones Check all VBATT-lines...
Flash Programming Fault Figure 4: Flash programming troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Measure BSI-pulse Check BSI-line including Is the FBUS during Flash X100,C100,C240,R202 TX-line HIGH operation. Is it OK? after startup? and R206. R310 and R206 Measure FBUSTX-line Check R104.
Phone is jammed Figure 5: Jammed phone troubleshooting (1) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Phone is jammed Check L260-265, Check VBATT1-6 Measure VIO, VCORE, C260-265, VIO,VCORE,VFLASH1,VANA, VFLASH1, VANA, BSI/BTEMP lines and VR3 lines. VR3 voltages. VBATT lines Are they OK ? Are they OK ? Check BSI/BTEMP lines.
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Figure 6: Jammed phone troubleshooting (2) Phone is ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn jammed Measure Phone Shutdown watchdog signal Change after 30s CBUSDA from J414. Is it OK ? Retest Measure CBUSClk 1MHz signal from testpoint J406. Is it OK ? Measure FBUSRx Read phone info.
Keypad Fault Figure 8: Keypad troubleshooting (1) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Check Measure voltage R305, Is the power key R306,C310,S30 from S302. Is it working? 2 and line. If OK, HIGH? change UEM Phone is Measure voltage dead Check S302.
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Figure 9: Keypad troubleshooting (2) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Continue Try to change UI Is the UI-module PWB. Are the Retest failing keys working? keys working UI-module now? Check X301 (solder Change X301 joints and spring contacts). Is it OK? Measure ROW0 - Row4 lines from X301.
Illumination fault Figure 11: Illumination fault troubleshooting 1 ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Start Are the keybar LEDs Are the display VLED and/or Flashlight LEDs working? working? KB LED Change display. Retest failing display Yes Are the LEDs working now? Check X302 connector Check V314,V313, contacts and solder...
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Figure 12: Illumination fault troubleshooting 2 Start KB LED ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Are the display LEDs Are the keyboard VLED and/or Flashlight LEDs working? working? Flashlight Change UI PWB Retest failing UI PWB Are the LEDs working now? Check X301 connector Check V311,V312, contacts and solder...
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Figure 13: Illumination fault troubleshooting 3 Start Flashlight ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Are the display LEDs Are the Flashlight VLED and/or keyboard LEDs LEDs working? working? Flashlight Check V318,V319,V317,V320, R316 and R318 If not OK, change defect part...
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Figure 14: Illumination fault troubleshooting 4 Start VLED ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Measure VLED=~8.4V when LED driver is enabled. Is this OK? (Note that VLED=VBAT when LED driver is disable!) Retest Check N300, L300, V300,R301,R315, R317, R325,C302, C305, and C304. (Note that C311 and V31 are not mounted!) If not OK, change defect part...
Accessory Fault Figure 16: Accessory troubleshooting ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Start Check system Is accessory detected Repair solderings or check contact connector X101 when connected to (solder ings, contact plates if dirty. Retest. system connector? plates). Is it OK? ACI-Accessory Measure ACI-line Check ACI- line (L106,R103,R102,R109,C103).
Audio Fault Figure 17: Audio troubleshooting (1) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Audio faults Check earpiece contact springs from Try to change old UI-module and Is earpiece UI- module. Is it working change earpiece and working ? now ? foam to old UI- module.
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Figure 18: Audio troubleshooting (2) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Earpiece Connect EXT audio signal 1kHz (sine, 200mVpp) between XMICP and XMICN pads (X101, 9/10) Measure sine Measure sine signal from earpiece Check C154. If OK signal to UEM (R155). pads (J310,J311).
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Figure 19: Audio troubleshooting (3) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Audio faults Check mic contact springs Try to change new from old UI module. Is microphone UI-module. Is it working If not OK replace working ? now ? microphone in old UI module with new one.
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Figure 20: Audio troubleshooting (4) ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Audio faults IHF speaker or Try to change new C- contact springs IHF speaker cover assembly. Is it fault. working ? working now? Retest. Restore old C-cover. Set phone to local mode with Phoenix. Set buzzer ON, vol "9"...
Camera Fault Camera troubleshooting diagram ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn 2.8V (VFLASH2) from C970 and 1.8V Check 2.8V (VFLASH2) from FM-radio block (VCAMDIG) from C983. Are they OK?
FM Radio troubleshooting Figure 22: FM Radio Component layout ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn Figure 23: FM radio block layout. J356 (FMCtrlDa) J357 (FMCtrlClk) J358 (FMWrEn) J359 (FMClk)
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. ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn FM Radio troubleshooting diagram Notes to "FM Radio troubleshooting diagram"...
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87.5 and 108.0 MHz. Measure audio from C162 and C163. Both OK ? Change N356. Measure signal from J103 and J104. Is it OK ? E Nokia Corporation Change OK, RETEST IN FLALI radio module TB4 Diagrams of FM radio signals...
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Figure 25: Oscilloscope screen shot, Audio output ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn 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 26: FM radio clock from test point J359, 32 kHz frequency clock signal, when radio is on.l...
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Figure 27: FM frequency from FM radio pin 37, the other end of L358, with FM test signal 15:51:49 03 JUL 2002 MKR 97.9280 MHz REF -20.0 dBm #AT 0 dB -71.03 dBm SWEEP ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn PEAK CONT SGL FREE RUN...
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