Baseband Troubleshooting................... 25 BB Measurement points ....................25 Troubleshooting diagrams ..................27 FM Radio troubleshooting ................... 48 FM Radio component layout ..................48 FM Radio troubleshooting diagram ................50 Notes to "FM Radio troubleshooting diagram"............50 Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 3...
When using RF probe usually a good way is to use metallic tweezers to connect probe ground to PWB ground as close to measurement point as pos- sible. Copyright Nokia. All rights reserved. Page 4 Issue 2 06/03...
- Select band "EGSM900" or "GSM 1800" or "GSM1900" (Default = "EGSM900") - Set Active unit to "Tx" (Default = "Rx") - Set Operation mode to "Burst" (Default = "Burst") - Set Tx data type to "Random" (Default = "All1") Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 7...
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EGSM1900 (Defaults) - Set Tx PA mode to "Free" (Default) - Set power level to 5 (Default = 19) on EGSM900 or to 0 (Default = 15) on GSM1800 or GSM1900 Copyright Nokia. All rights reserved. Page 8 Issue 2 06/03...
Major differences ? Check with oscilloscope: Check control loop Replace HELGA PA ctrl voltage dead components >1.5V peak OK ? OK ? Replace PA & ant switch faulty troubleshooting component(s) Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 9...
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Level >-10dBm (* Level >-10dBm OK ? *(When 1kOhm passive probe is used, correct the measurement result by +26dB Check modulator output components Replace HELGA dead OK ? Replace faulty component(s) Copyright Nokia. All rights reserved. Page 10 Issue 2 06/03...
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- VTXB = 2.8 V pulsed VANT lline components - VTxLO_GSM = 0V (GSM900) (EGSM900) OK ? OK ? Replace Replace faulty component(s) Check components around PA Replace HELGA OK ? Replace faulty component(s) Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 11...
VANT_2 / GSM1800 TX at C835 VANT_3 / GSM1900 TX at C805 OV ( no signal/ Flatline on Oscilloscope screen) 500mV/div MTB 100us/div 500mV/div 100us/div VTXB_900 at C713 TXP at J504 VTXB_1800_1900 at C714 Copyright Nokia. All rights reserved. Page 12 Issue 2 06/03...
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8 9 7 . 4 0 0 M H z S P A N 2 . 0 0 0 M H z Tx out signal, 900 band, burst mode, channel 37 Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 13...
- Set Operation mode to "Continuous" - Set AGC to "12: FEG_ON + DTOS_ON + BB_30=Vgain60” (maximum gain setting used in normal mode) (Default = "14: FEG_ON + DTOS_ON + BB_42=Vgain72") Copyright Nokia. All rights reserved. Page 14 Issue 2 06/03...
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(channel 37) measured from testpoint RXI or RXQ with 942.467 MHz signal, input level –90dBm at RF-connector. Correct signal amplitudes approximately: • EGSM900~170mVpp • GSM1800~140mVpp • GSM1900~160mVpp Signal part frequency 67.7kHz sine. Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 15...
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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. Trace1: External LNA VCC supply voltage at burst mode, input level –90 dBm. Measured from testpoint LNA_VCC. Copyright Nokia. All rights reserved. Page 16 Issue 2 06/03...
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Used channel 37, input signal 942.467 MHz, level –90 dBm at antenna port, AGC setting Phase difference should be 90 degrees between RX I and Q signals at all bands. Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 17...
Spectrumanalyzer continuous mode will decrease 4G VCO out Synthesiszer trou- slowly. 3769.6MHz bleshooting The original level can be resto- ∼–30 dBm (* red by rewriting gain set. Check HELGA N500 Copyright Nokia. All rights reserved. Page 18 Issue 2 06/03...
* ** DC–level of RXI/RXQ in 3769.6MHz bleshooting continuous mode will decrease ∼–30 dBm (* slowly. The original level can be resto- red by rewriting gain set. Check HELGA N500 Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 19...
3685.6MHz bleshooting * ** DC–level of RXI/RXQ in ∼–30 dBm (* continuous mode will decrease slowly. The original level can be resto- red by rewriting gain set. Check HELGA N500 Copyright Nokia. All rights reserved. Page 20 Issue 2 06/03...
- Set Active unit to "Rx" (Default = "Rx") - Set Operation mode to "Continuous" (Default = "Burst") - Set Rx/Tx channel to 37 on EGSM900 band, 700 on GSM1800 band, 661 on GSM1900 band (Defaults) Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 21...
VCO pin solder joints 0V ? OK ? Replace faulty component(s) Check with oscilloscope: Check VCO control VCO control voltage loop components from VCO pin OK ? >4.0 V ? Replace Copyright Nokia. All rights reserved. Page 22 Issue 2 06/03...
CCS Technical Documentation 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 Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 23...
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R B W 10 kH z VB W 10 kH z SW P 50 m s C EN TER 3. 685600 G H z SPA N 1. 000 M H z Copyright Nokia. All rights reserved. Page 24 Issue 2 06/03...
Phone current is Is phone flash Phone is <50mA proramming OK jammed Flash faults Check BSI line, X100, Is phone in LOCAL C240,R203, Change UEM mode C100,R206 Repair Ok retest Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 27...
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Is it OK ? If OK change G501 Check R420, C420. If OK change N500 Measure PURX signal from testpoint J402. Change UEM Is it HIGH (1.8V) ? Phone is jammed Copyright Nokia. All rights reserved. Page 28 Issue 2 06/03...
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Change Is it OK ? read from testpoint J412. Is it OK ? Measure FBUSTx Change signal during phone info read from testpoint J411. Is it OK ? Change Retest Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 29...
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FBUSTx line. If Flash programming (TP 411) Is it HIGH (1.8V)? Change UEM Phone doesn't set FlashBus TxD line LOW after the Change UPP line has been set HIGH Flash faults Copyright Nokia. All rights reserved. Page 30 Issue 2 06/03...
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Troubleshooting Instructions Flash faults Wrong manufacturer Change Flash ID or Device ID Phone is totally dead Phone is dead Phone doesn't start Phone is up or phone is jammed jammed Retest Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 31...
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Is it 3V (1.8V) still wrong VSIM change UEM Check SIM Check SIM lines. If power up sequency. OK change R388. If Is it OK ? still fail change UEM. Change UPP Copyright Nokia. All rights reserved. Page 32 Issue 2 06/03...
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Check V311, V312, voltage between J303 R311, R312. and J302 .Is it Retest typ. 7.2V ? Measure voltage between X302, Change X302. pin 9. Is it Retest typ. 7.2V ? Display faults Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 33...
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Check V311, V312, voltage between J303 R311, R312. and J302 .Is it Retest typ. 7.2V ? Measure voltage between X302, Change X302. pin 9. Is it Retest typ. 7.2V ? Display faults Copyright Nokia. All rights reserved. Page 34 Issue 2 06/03...
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(2.78V) and VDD/J300 (1.8V).Are lines are OK change they OK ? Check signals RESX/J306, Check lines of display SDA/J305,SCLK/J307, control. If OK change CSX/J304. Is it OK ? Change X302 Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 35...
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If OK change UEM Measure Check L102, C116, MICB2 voltage from C150, R153, R154 XMIC (L102 input). and line. Is it ~2.2V ? If OK change UEM. Audio faults Earpiece Copyright Nokia. All rights reserved. Page 36 Issue 2 06/03...
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J110 pad. R157, R176. Is it ~1.38V ? If OK change UEM Check C151, R157, C105,C154 and line. If OK change UEM if still fail change UPP Audio faults Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 37...
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Measure sine signal from earpiece signal from UEM Change UEM pads (J310,J311). (R151,R152). Is It ~880mVpp ? Is it ~130mVpp ? Check R151,R152, C155, L150 and lines. Change UPP Retest Copyright Nokia. All rights reserved. Page 38 Issue 2 06/03...
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Check signal in C161. C169. Is it OK ? If OK then change UEM Check IHF PA Change IHF PA controls on J152, (N150) J523,J154. Is it OK ? Change UPP Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 39...
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If OK change UEM Measure voltage from S302 when powerkey is Phone is pressed. jammed Is it HIGH ? Check S302. Change S302 Is it OK ? Keyboard Phone is faults dead Copyright Nokia. All rights reserved. Page 40 Issue 2 06/03...
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Is it ~1.8V ? Check ROW0-4 lines, When keypad is X301. If OK change pressed, the LED's are Z300. If still fails change turned on ? UPP. Keyboard Display faults faults Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 41...
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Check S301 and COL4 Measure COL4 from lines. If OK change S301 when key is pressed. Z300. Is there 50us pulse ? If still fail change UPP Change UPP Keyboard faults Copyright Nokia. All rights reserved. Page 42 Issue 2 06/03...
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If OK change N300 Measure Check V313, V314, voltage between V313/3. Is it R313, R314 typ. 7.2V ? Measure voltage X301, pin 1.Is it Check X301, R307 typ. 7.2V ? Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 43...
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L106,R103, R109, it OK ? C103. If OK change UEM. Retest Check C107, C108, L103, C114, Audio OK ? C119, R105, R106, R164, R165, C157 Accessory if Audio fault fault Copyright Nokia. All rights reserved. Page 44 Issue 2 06/03...
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C103. If OK change UEM. Retest. Check C107, C108, C109, C117, L103, L104, C113, C114, C118, C119, R105, Audio OK ? R106, R107, R108, R164,R165, R166, R167, C157, C158 Audio fault Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 45...
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0, R301, R302, R303, Is it typ. 8.6V ? R325, C304. If OK change N300 Measure Check V320, V317, voltage V317/3 .Is it R315, R316 typ. 7.2V ? Change V318,V319 Display faults Copyright Nokia. All rights reserved. Page 46 Issue 2 06/03...
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If any self test is failed, contact service information will be shown on display. Set phone to LOCAL mode Use Phoenix BB Self Tests. Run All Self test show now what test are failed. Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 47...
NPM-6/6X Company confidential Troubleshooting Instructions CCS Technical Documentation FM Radio troubleshooting FM Radio component layout Figure 22: Component placement Copyright Nokia. All rights reserved. Page 48 Issue 2 06/03...
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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 sec- tion, near audio amplifier N150. Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 49...
- Carrier frequency, f , 98,000 MHz ∆ - Deviation, f, 75 kHz - Modulating frequency f , 1,000 kHz (RF generator internal) - FM stereo, mode R=L, pilot state ON Copyright Nokia. All rights reserved. Page 50 Issue 2 06/03...
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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 Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 51...
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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 Copyright Nokia. All rights reserved. Page 52 Issue 2 06/03...
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#RES BW 10 kHz #VBW 10 kHz #SWP 20.0 msec Figure 29: VCO frequency from FM radio pins 3 and 4, the other ends of V356 and V357, with FM test signal Copyright Nokia. All rights reserved.. Issue 2 06/03 Page 53...
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NPM-6/6X Company confidential Troubleshooting Instructions CCS Technical Documentation Copyright Nokia. All rights reserved. Page 54 Issue 2 06/03...