Text preview for : 06-nhl4-trouble.pdf part of Nokia 6610, 7210 Service Manual, Part, Variant, Tools, Troubleshooting, Schematic, ecc. (original 10/02) - File 10
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3DJH 1R RF Troubleshooting ....................................................................................................... 4 Introduction to RF troubleshooting .............................................................................4 RF Key component placement .....................................................................................5 RF Measurement points ...............................................................................................6 GSM900 & GSM1800 Transmitter................................................................................ 7 General instructions for Tx troubleshooting ............................................................. 7 Transmitter troubleshooting diagram ........................................................................ 9 Pictures of transmitter signals ................................................................................. 12 GSM900, GSM1800 and GSM1900 Receiver............................................................. 14 General instructions for Rx troubleshooting ........................................................... 14 Troubleshooting diagram for GSM900 receiver ..................................................... 18 Troubleshooting diagram for GSM1800 receiver ................................................... 19 Troubleshooting diagram for GSM1900 receiver ................................................... 20 Synthesizer ................................................................................................................... 21 General instructions for synthesizer troubleshooting.............................................. 21 Synthesizer troubleshooting diagram ...................................................................... 22 Pictures of synthesizer signals................................................................................. 23 Baseband troubleshooting ............................................................................................ 25 Main Troubleshooting Diagram ................................................................................25 Phone is dead .............................................................................................................26 Flash Programming Fault ..........................................................................................27 Phone is jammed ........................................................................................................28 SIM card fault (Insert SIM / Card rejected) ...............................................................29 Keypad Fault ..............................................................................................................30 Display Fault ..............................................................................................................32 Illumination fault .......................................................................................................33 Charger Fault .............................................................................................................34 Accessory Fault .........................................................................................................35 Audio Fault ................................................................................................................36 FM Radio troubleshooting ........................................................................................... 37 FM Radio component layout .....................................................................................37 FM Radio troubleshooting diagram ...........................................................................38 Notes to "FM Radio troubleshooting diagram"....................................................... 38 Diagrams of FM radio signals ................................................................................. 40
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TX troubleshooting
TX OK
Yes Check output signal level: +32...+33dBm @897.4 MHz (GSM900) Yes +29...+30dBm @1747.8 MHz (GSM1800 & GSM1900) OK ? Check all power levels, OK ? No Tune TX power levels, OK ?
TX signal found ?
No
Check output signal on 500 MHZ span Signal found on incorrect frequency ? No No HELGA troubleshooting
Yes
Synthesizer troubleshooting
Yes Check with RF probe signal level on PA input >=0dBm (* OK ? Yes start TX power level tuning and check tuned RAC values: Highest level~700...900 Lowest level ~190...210 Base levle ~160...190 Major differences ? No
*(When 1kOhm passive probe is used, correct the measurement result by +26dB
Yes Tune Tx DAC values
Yes Check with oscilloscope: PA ctrl voltage >1.5V peak OK ? Yes Check control loop components OK ? Replace HELGA dead
No
Yes
PA & ant switch troubleshooting
Replace faulty component(s)
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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 ?
No
Baseband troubleshooting
Check with RF probe: -4G VCO out signal - 3589.6 MHz (GSM900) -3495.6 MHz (GSM1800) - 3760 MHz (GSM1900) Level >-10dBm (* OK ?
No
Synthesizer troubleshooting
*(When 1kOhm passive probe is used, correct the measurement result by +26dB
Check modulator output components OK ?
Yes Replace HELGA dead
Replace faulty component(s)
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PA & ant switch troubleshooting *(When 1kOhm passive probe is used, correct the measurement by +26dB Yes Check with oscilloscope: -VANT_1 (GSM900) -VANT_2 (GSM1800) -VANT_3 (GSM1900) OK ? No Check VANT lline components OK ?
Yes Check with RF probe signal level on PA input >=0dBm (* OK ? Yes
Replace ant. switch
Check with oscilloscope: -VBATT ~4V - VTXB = 2.8 V pulsed - VTxLO_GSM = 0V (GSM900) OK ? Yes No Replace PA
Yes
No
Replace faulty component(s) Check components around PA OK ? Yes Replace HELGA
No
Replace faulty component(s)
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200mV/div 1
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VPCTRL _900 power level high at R703/C703 VPCTRL_1800/1900 power level high at R704/C704B
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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)
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Apply 90dBm 942.46771MHz signal from generator to antenna connector
Yes Oscilloscope at RX_I Signal 700mVpp DC offset 1.35V*** Frequency 67.7kHz
No Change generator level to 50dBm
Yes Spectrumanalyzer Antenna Switch outputs, GSM900 88 dBm
No Spectrumanalyzer Antenna Switch input 84 dBm
No Check C831, L811
Yes 900RX chain functional
Yes
No Oscilloscope VANT_1...3 0V Oscilloscope : Check HELGA serial interface (burst mode)
No Check Baseband
Yes Yes Yes Check HELGA N500
Check Antenna switch Z800
Spectrumanalyzer HELGA inputs GSM900 89 dBm Yes Oscilloscope VR1,3...6 2.7V Check HELGA serial interface (burst mode)
No Check L809 L810
All spectrumanalyzer reading values are measured with 2.5 kohm passive probe (use tweezers to connect the probe ground to the nearest PWB ground). Reading value is represented without +34 dB compensation.
No
Check Baseband
* Spectrumanalyzer reading with 1 kohm passive probe (right value add +34 dB)
Spectrumanalyzer 4G VCO out 3769.6MHz 30 dBm (*
No Synthesiszer troubleshooting
* ** DClevel of RXI/RXQ in continuous mode will decrease slowly. The original level can be restored by rewriting gain set.
Yes Check HELGA N500
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Apply 90dBm 1842.86771MHz signal from generator to antenna connector
Yes Oscilloscope at RX_I Signal 140mVpp DC offset 1.35V *** Frequency 67.7kHz
No Change generator level to 50dBm
Yes Spectrumanalyzer Antenna switch outputs, 1800 LNA out 61 dBm
No Spectrumanalyzer Antenna Swithc input -84 dBm
No Check C831, L811
Yes GSM1800 RX chain functional
Yes
No Oscilloscope VANT_1...3 0V Oscilloscope Check HELGA serial interface (burst mode)
No Check Baseband
Yes Yes Check HELGA N600 Yes Check Antenna Switch Z800 All spectrumanalyzer reading values are measured with 1 kohm passive probe (use tweezers to connect the probe ground to the nearest PWB ground). Reading value is represented without +26 dB compensation.
Spectrumanalyzer HELGA inputs GSM 1800 88 dBm
No
Check C838, C839, L821. L 872, C836, C837, V801
Yes Oscilloscope VR1,3...6 2.7V Check HELGA serial interface (burst mode) Yes No
Check Baseband * Spectrumanalyzer reading with 1 kohm passive probe (right value add +26 dB)
Spectrumanalyzer 4G VCO out 3769.6MHz 30 dBm (*
No Synthesiszer troubleshooting * ** DClevel of RXI/RXQ in continuous mode will decrease slowly. The original level can be restored by rewriting gain set.
Yes Check HELGA N500
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Apply 90dBm 1842.86771MHz signal from generator to antenna connector
Yes Oscilloscope at RX_I /RXQ Signal 160mVpp DC offset 1.35V *** Frequency 67.7kHz
No Change generator level to 50dBm
Yes Spectrumanalyzer Antenna Switch output, GSM1900 88 dBm
No Spectrumanalyzer Antenna Switch input 84 dBm
No Check C831, L811
Yes Yes Oscilloscope VANT_3 2.7VV VANT_1/2 0V Yes Yes Check Antenna switch Z800 Check HELGA N500 No Oscilloscope Check HELGA serial interface (burst mode) No Check Baseband
GSM1800 RX chain functional
Spectrumanalyzer HELGA inputs GSM1900 78 dBm
Spectrumanalyzer RX_SAW_out Yes 90 dBm
Check Baseband
Oscilloscope LNA_VCC 2.6V LNA_P 0 V
Oscilloscope VR1,3...6 2.7V Check HELGA serial interface (burst mode)
Check Baseband
Yes Yes Check V802, C826, Z802, C829, C8097, C808 Check HELGA N500 All spectrumanalyzer reading values are measured with 1 kohm passive probe (use tweezers to connect the probe ground to the nearest PWB ground). Reading value is represented without +26 dB compensation.
Oscilloscope VR1,3...6 2.7V Check HELGA serial interface (burst mode)
Check Baseband * Spectrumanalyzer reading with 1 kohm passive probe (right value add +26 dB)
Yes Spectrumanalyzer 4G VCO out 3685.6MHz 30 dBm (*
Synthesiszer troubleshooting
Yes
* ** DClevel of RXI/RXQ in continuous mode will decrease slowly. The original level can be restored by rewriting gain set.
Check HELGA N500
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Yes
*(When 2.5kOhm passive probe is used, correct the measurement by +34 dB Yes Synthesizer OK
Set with RF controls: Active Unti = Rx Operation mode = Continuous Check with RF probe: -4G VCO out signal - 3589.6 MHz (GSM900) -3495.6 MHz (GSM1800) - 3760 MHz (GSM1900) Level >-10dBm (* OK ? No VCO out signal level<-10dBm
Yes
Check balun output levels and solder joints OK ? No
Yes
No
Replace faulty component(s)
Check output signal on 1 GHz span Signal found on incorrect frequency ?
Check with oscilloscope: Yes -4G VCO Vcc = 2.7V No OK ? No
Replace VCO
Yes
Baseband troubleshooting
Check with oscilloscope: VCO control voltage from VCO pin 0V ? No Check with oscilloscope: VCO control voltage from VCO pin >4.0 V ?
Yes
Check balun output levels and solder joints OK ? Yes Check VCO control loop components OK ? Yes Replace VCO
No Replace faulty component(s)
No
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Phone totally dead No
Yes
Phone is dead
Flash programming doesnt work No Phone doesn't start up or the phone is jammed No Charging doesn´t work No Phone doesn't read SIM card No Audios doesn´t work No
Yes
Flash faults
Yes
Phone is jammed
Yes
Charger fault
Yes
SIM card fault
Yes
Audio faults
Keypad doesn´t work No
Yes
Keypad faults
Display doesn´t work No Accessory doesn´t work No Illumination doesn't work No
Yes
Display faults
Yes
Accessory faults
Yes
Illuminationy faults
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Start
Is phone current 0 mA?
Yes
Check X100 (contacts, solderings). Is it OK?
No
Change X100
Yes
Check L260 L265 and C260 C265. Are they OK?
No
No
Change defect ones
Yes
Check all VBATT-lines
Phone current < 50 mA
Yes
Is flash programming working OK? No
Yes
Phone is jammed
No
Flash fault
Phone current ~54 mA Yes
No
Is phone in LOCAL mode ?
No
Check BSI-line including X100,C100,C240,R202 and R206. Are they OK?
Yes
Change UEM
Yes
No Change defect part
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Start
Is the FBUS TX-line HIGH after startup?
No
Measure BSI-pulse during Flash operation. Is it OK?
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. If OK, change UEM
No
Change UPP
Yes
Wrong manufactor ID and device ID No Is phone totally dead? No
Yes
Change Flash
Yes
Phone is dead
Phone doesn't start up or it's jammed? No
Yes
Phone is jammed
End (retest)
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Start
Measure VIO, VCORE, VFLASH1,VANA, VR3 voltages. Are they OK?
No
Check VBATT1-6, VIO, VCORE, VANA, VR3 lines. Are they OK? Yes
No
Check L260-L265, C260-C265, BSI/BTEMP -lines and VBATT-lines Check BSI/BTEMP-lines. If OK, UEM regulators are not working. Change UEM. Check B200, C209 and C210 Change UEM Check G501. If not OK, change. Check R420, C420. If OK, change N500. Change UEM
Yes
Measure 32.6kHz Sleep Clk from testpoint J404. Is it OK? Yes
No
Measure Sleep Clk from B200. Is it OK?
No Yes
Measure 26MHz RFClk from R420. Is it OK? Yes Measure PURX-signal from testpoint J402. Is it ~1.8V? Yes Phone shutdown after 30s No Measure 1MHz Clk signal from testpoint J413. Is it OK? Yes Read phone info. Is it OK?
No
Measure 26MHZ RFClk from G501. Is it OK?
No
Yes
No
Yes
Measure watchdog signal from testpoint J414. Is it OK?
No
Change UPP
No
No
Measure FBUSRX-signal during phone info read from testpoint J412. Is it OK? Yes
No
Change UEM
Yes Measure FBUSTX-signal during phone info read from testpoint J411. Is it OK? Yes Change TB4 module or retest Change UEM No Change UPP
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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.
Yes No
Measure VSIM voltage from X386. Is it ~3.0V? Yes Check SIM lines (X386). If OK, change R388. If still fail, change UEM. Check VSIM-line (X386,C390,R386,C203). If OK, change R388. If still fail, change UEM.
No
Check SIM power-up sequence. Is it OK?
No
Yes
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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?
Check S302. Is it OK?
Yes
Phone is dead
Yes
No No Phone is jammed
Change S302
Is the volume UP key working?
No
Measure ROW0 line from S300. Is it ~1.8V?
No
Check S300 and line. If OK, change Z300.If still FAIL, change UPP
Yes
Measure COL0 from S300 when pressed. Is there 50us pulse? Check S300 and COL0 line. If OK, change Z300.If still FAIL, change UPP
No
Yes
Yes
Change UPP
Is the volume Down key working?
No
Measure ROW1 line from S301. Is it ~1.8V?
No
Check S301 and line. If OK, change Z300.If still FAIL, change UPP
Yes Yes
Measure COL0 from S301 when pressed. Is there 50us pulse? Check S301 and COL0 line. If OK, change Z300.If still FAIL, change UPP
No
Continue
Yes
Change UPP
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Is the UI-module keys working?
No
Try to change UI PWB. Are the keys working now?
Yes
Retest failing UI-module
No
Check X301 (solder joints and spring contacts). Is it OK?
No
Change X301
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 ~1.8V? Yes When keypad is pressed, are the LED's turned on? No Illumination fault
Check lines ROW0 ROW4 from X301.
No
If OK, change Z300. If still fails, change UPP
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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
Yes Measure RESX(J306) and CSX (J304) signals. Are voltage levels ~1.8V?? Yes Measure SDA (J305) and SCLK (J307) signals. Are voltage levels ~1.8V? Yes Are the display LED's working when key is pressed or enabled by Phoenix SW? Check X302, R308,R309 and lines. If OK, change UPP.
No
Check X302 and lines again. If OK, change UPP
No
No
Illumination fault
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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
Measure VLED+ and VLED-. VLED+ = ~7.5V and VLED= ~0.5V when LED driver is enabled. Are they OK? (Notice: VLED+=VBATT when driver is disabled) Are the keyboard LED's working? Try to change UI PWB. Are the LED's working now?
No
Check N300, L300, V300, R300,C303,C304. If not OK, change defect part.
No
Yes
Retest failing UI PWB
No
Check X301 (solder joints). Is it OK?
Yes
No
Change X301
Yes
Measure VLED+. VLED+ = ~7.5V when LED driver is enabled. Is it OK? Yes Check N300, L300, V300, R300,C303,C304. If not OK, change defect part.
No
Check all LED's in UI PWB (V101 - V106). Are they OK? Yes
No
Change defect parts
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Battery bars are working (scroll)
Yes
Retest
No
Measure voltage over V100 (TVS). Is it > 3.0V?
No
Check X102, F100, L100, V100, C106, C110 and line.
Change defect part (if any), re-calibrate charge current/voltage. Retest.
Yes
Read BTEMP value. Compare it to ambient temperature. Is it ~25C? Yes
No
Check X100, C100, R202, R207, C220 and line. Are they OK?
Yes
Re-calibrate BTEMP with Phoenix SW. Retest.
No
Change defect part, re-calibrate and retest.
Measure charger current throug F100. Is it ~350...390mA (with ACP-7)? Yes
No
Check R200. Is it OK? No
Yes
Change UEM
Change defect part, re-calibrate charge current/voltage. Retest.
Retest
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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.
Yes
Check VOUT-line (N100, L107, R103, C101, C102, C112). If not OK, change defect part and retest.
Measure VOUT voltage (pin4). Is it ~2.8V?
No
Yes
Retest
Non-ACI Accessory
Measure ACI-line (pin3). Is it ~0V? Check ACI- line (L106,R103,R102,R109,C103). No If not OK, change defect part and retest.
Yes
Measure VOUT voltage (pin4). Is it ~0V?
No
Check that regulator N100 enable-pin is LOW-state. If not OK, check ACI-line again
Yes
End Retest
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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.
Yes
Measure MIC2B voltage from XMICP (L102). Is it ~2.2V? Yes
No
Check L102, C116, R150, C159, R153, C150 and line. If OK, change UEM.
Connect EXT audio signal (1kHz sine, 200mVpp) in XMICP and GND in XMICN.
Measure sine signal from earpiece pads. Is it~880mVp-p?
No
Measure sine signal from R155 (UEM). Is it ~130mVp-p? No
Yes
Change UEM
Yes
Change UPP and retest
Check C154, R155, C156, R154 and lines.
Continue
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Set phone into local mode. Start FM radio. Check C374, C375, R375, R358 and measure 32kHz clock signal from J359, retest starting. Start OK ?
Does the radio start ? YES Connect RF test signal (note1) Set radio channel to 98.0 MHz Set radio volume to max.
NO
NO
Measure voltages from pins 7 and 34, is it 2.7 V ? Retest starting. Start OK now ?
NO
Check N356 solders (pins 5,6,7,8,9,11, 12,13,17,33,34,35, 36, 37. Start OK now ?
NO
YES Measure Audio signal from C162 and C163. Is it 1kHz 0.50.8Vpp?
YES
YES
Change N356. Radio start OK now?
OK, RETEST IN FLALI YES NO Baseband digital fault (UPP)
NO
Check C107, C108, C109, C117 , L105,C367,C378, C379, L358. Measure signal from C162, C163 Is it 1kHz 0.50.8 Vpp?
YES
Check R164, R165, R166, R167, L103,L104 Measure signal from J103 and J104. Is it 0.0150.3 Vpp?
Set Radio and RF generator to 87.5 and 108.0 MHz. Measure Audio from C162 and C163. Are both cases 1 kHz 0.5 0.8 Vpp ? NO NO
YES
Audio Amplifier failure (N150)
NO
YES
Check R359,R360, V356, V357, L356,L357,C357, C358,C362. Measure signal from J103, J104, OK ?
YES
Check V356, V357, L356, L357, C357, C358, C362, R359, R360. Test again with 87.5 and 108.0 MHz. Measure audio from C162 and C163. Both OK?
YES
NO
NO
Change N356. Measure signal from J103 and J104. Is it OK ?
Change V356 and 357. BOTH ! Retest with 87.5 and 108.0 MHz. Measure audio from C162 and C163. Both OK ? YES NO
YES
NO
Change radio module TB4
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OK, RETEST IN FLALI
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