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NPM-6 Series Transceiver

Troubleshooting Instructions

Issue 1 01/03

„Nokia Corporation

Troubleshooting Instructions

CCS Technical Documentation

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CCS Technical Documentation Table of Contents

Troubleshooting Instructions

RF Troubleshooting .......................................................................................................4 Introduction to RF troubleshooting .............................................................................4 RF Key component placement .....................................................................................5 RF Measurement points ...............................................................................................6 EGSM900 & GSM1800 Transmitter .............................................................................7 General instructions for Tx troubleshooting .............................................................7 Transmitter troubleshooting diagram ........................................................................9 Pictures of transmitter signals .................................................................................12 EGSM900, GSM1800 and GSM1900 Receiver ..........................................................14 General instructions for Rx troubleshooting ...........................................................14 Troubleshooting diagram for EGSM900 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 FM Radio troubleshooting ...........................................................................................46 FM Radio component layout .....................................................................................46 FM Radio troubleshooting diagram ...........................................................................48 Notes to "FM Radio troubleshooting diagram" .......................................................48

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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 built around one RF-ASIC (HELGA N500). For easier troubleshooting, this RF troubleshooting document is divided in to sections. Before changing HELGA, please check following things: Supply voltages are OK and serial communication is coming from baseband to HELGA. Please note that the grounding of the PA module is directly below PA-module so it is difficult to check or change. Most RF semiconductors are static discharge sensitive! So ESD protection must be taken care of during repair (ground straps and ESD soldering irons). HELGA and PA are moisture sensitive so parts must be pre-baked prior to soldering. Apart from key components described in this document here are a lot of discrete components (resistors, inductors and capacitors) which troubleshooting is done by checking if soldering of the component is done properly (for factory repairs checking if it is missing from PWB). Capacitor can be checked for shortening and resistors for value by means of an ohmmeter, but be aware in-circuit measurements should be evaluated carefully. Please be aware that all measured voltages or RF levels in this document are rough figures. Especially RF levels varies due to different measuring equipment or different grounding of the used probe. 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 possible.

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Troubleshooting Instructions

RF Key component placement
Figure 1: Component placement 1

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Troubleshooting Instructions

CCS Technical Documentation

RF Measurement points
Figure 2: Component placement 2

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Troubleshooting Instructions

EGSM900 & 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. Attention: When repairing or tuning transmitter use external DC supply with at least 3A current capability. Set the DC supply voltage to 3.9V and set the jumper connector on test jig to "bypass" position. Connect a RF-cable to the module test jig (MJS-49) RF connector to and to measurement equipment or at least 10dB attenuator, otherfwise the PA may be damaged. Normally Spectrum analyzer is used as measurement equipment. Attention: Normally Spectrum analyzer maximum input power is +30dBm. It is recommended to use 10dB attenuator on Spectrum analyzer input to prevent damage. Set the phone module to test jig and start Phoenix service sofware Initialize connection to phone. (use FBUS driver when using DAU9S and COMBOX driver when using FPS-8) Select product from the menu File -> Choose product -> NPM-6 From toolbar set operating mode to "Local" Activate RF controls window from the menu Maintenance -> Testing -> RF Controls From the RF controls window - 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")

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Troubleshooting Instructions

CCS Technical Documentation

- Set Rx/Tx channel to 37 on EGSM900 band or 700 on GSM1800 band or 661 on 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

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CCS Technical Documentation Transmitter troubleshooting diagram

Troubleshooting Instructions

Figure 3: Transmitter troubleshooting

TX troubleshooting

TX OK

Yes Check output signal level: (EGSM900 +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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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 ?

No

Baseband troubleshooting

Check with RFRF probe: Check with probe: -4GVCO outout signal -4G VCO signal - 3589.6 MHz (GSM900) -3589.6MHz (EGSM900) -3495.6 MHz (GSM1800) -3495.6 MHz (GSM1800) - 3760 MHz (GSM1900) -3760 MHz (GSM1900)

No

Synthesizer troubleshooting

Level >-10dBm (* Level >-10dBm

OK ?

*(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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Troubleshooting Instructions

Figure 5: PA and Antenna Switch troubleshooting

PA & ant switch troubleshooting *(When 1kOhm passive probe is used, correct the measurement by +26dB Yes Check with oscilloscope: -VANT_1 (GSM900) -VANT_1 (EGSM900) -VANT_2 (GSM1800) -VANT_2 (GSM1800) -VANT_3 (GSM1900) -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) (EGSM900) 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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Troubleshooting Instructions Pictures of transmitter signals
Figure 6: Transmitter signals TXI

CCS Technical Documentation

VPC

1

200mV/div

100us/div

200mV/div

100us/div

VPCTRL _900 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 100us/div

500mV/div

100us/div

VANT_1 / EGSM900 TX at C804 VANT_2 / GSM1800 TX at C835 VANT_3 / GSM1900 TX at C805 OV ( no signal/ Flatline on Oscilloscope screen)

VANT_1,VANT_2,VANT_3

500mV/div 100us/div

500mV/div

MTB 100us/div

VTXB_900 at C713 VTXB_1800_1900 at C714

TXP at J504

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CCS Technical Documentation
Figure 7: TX OUT signal
G S MP O W REF 4 1 . 0 1 0 d B/ d Bm ATT 4 0

Troubleshooting Instructions

T u e Se p 2 5 1 3 : 4 8 : 5 9 2 0 0 1 dB A_ wr i t e b l a n k B_

REF OF S 11. 0 dB

RBW 10 0 VBW 10 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

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Troubleshooting Instructions

CCS Technical Documentation

EGSM900, 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). Connect an RF-cable to the module test jig (MJS-49) RF connector and to RF signal generator. Set the phone module to test jig and start Phoenix service sofware. Initialize connection to phone. (use FBUS driver when using DAU9S and COMBOX driver when using FPS-8) Choose product from the menu File -> Choose product -> NPM-6 From toolbar set operating mode to "Local" Activate RF controls window from the menu Maintenance -> Testing -> RF Controls From the RF controls window: - Select band "EGSM900", "GSM 1800" or "GSM1900" (Default = "EGSM900") - Set Active unit to "Rx" (Default = "Rx") - Set Operation mode to "Burst" (Default = "Burst") For continuous mode: - 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")

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CCS Technical Documentation

Troubleshooting Instructions

- Set Rx/Tx channel to 37 on EGSM900 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). Measuring with an oscilloscope on "RXI" or "RXQ" following screens should be seen on a working EGSM900 , GSM1800 or GSM1900 receiver:
Figure 8: RX I/Q signal ,burst mode, input level ≠90dBm.

Figure 8, "RX I/Q signal ,burst mode, input level ≠90dBm.," on page 15: Receiver I or Q burst mode signal (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.

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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 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, 1st burst (shorter) is monitoring and 2nd burst (longer) is own RX burst. Trace1: External LNA VCC supply voltage at burst mode, input level ≠90 dBm. Measured from testpoint LNA_VCC.

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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 EGSM900 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.

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Troubleshooting Instructions Troubleshooting diagram for EGSM900 receiver Phone in "Continuous" mode, AGC setting "12"

CCS Technical Documentation

Figure 11: EGSM900 receiver troubleshooting
Apply ≠90dBm 942.46771MHz signal from generator to antenna connector

Yes Oscilloscope at RX_I Signal 700mVpp DC offset 1.35V*** Frequency 67.7kHz

No Change generator level to ≠50dBm

Yes

No

No Spectrumanalyzer Antenna Switch input ≠84 dBm Check C831, L811

Spectrumanalyzer Spectrumanalyzer Antenna Switch Antenna Switch outputs, GSM900 outputs,EGSM900 ≠88 dBm -88dBm

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 EGSM900 -89dBm ≠89 dBm

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.

Yes Oscilloscope VR1,3...6 2.7V Check HELGA serial interface (burst mode)

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

* ** DC≠level 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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CCS Technical Documentation Troubleshooting diagram for GSM1800 receiver Phone in "Continuous" mode, AGC setting "12

Troubleshooting Instructions

Figure 12: 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 67.7kHz

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 Check Helga N500 N600 N500
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 * ** DC≠level 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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Troubleshooting Instructions Troubleshooting diagram for GSM1900 receiver Phone in "Continuous" mode, AGC setting "12

CCS Technical Documentation

Figure 13: GSM1900 receiver troubleshooting

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, Z806 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

* ** DC≠level 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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Troubleshooting Instructions

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. Set the phone module to test jig and start Phoenix service sofware Initialize connection to phone. (use FBUS driver when using DAU9S and COMBOX driver when using FPS-8) Select product from the menu File -> Choose product -> NPM-6 From toolbar set operating mode to "Local" Activate RF controls window from the menu Maintenance -> Testing -> RF Controls From the RF controls window - Select band "EGSM900", "GSM 1800" or "GSM1900" (Default = "EGSM900") - 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)

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Troubleshooting Instructions Synthesizer troubleshooting diagram
Figure 14:
Synthesizer troubleshooting

CCS Technical Documentation

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: Check with RF probe: -4G VCO out signal -4G VCOMHz (EGSM900) -3589.6 out signal - 3589.6 MHz (GSM900) -3495.6 MHz (GSM1800) -3495.6 MHz (GSM1800) - -3760 MHz (GSM1900) 3760 MHz (GSM1900)

Yes

Level >-10dBm (* OK ? No VCO out signal level<-10dBm

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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CCS Technical Documentation Pictures of synthesizer signals

Troubleshooting Instructions

Figure 15: 26MHz at G501 pin out

Figure 16: 26MHz RFCLK at R420/C420

Figure 17: 1800 TX, channel 512, burst mode

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Troubleshooting Instructions

CCS Technical Documentation

Figure 18: 1900 RX, channel 810, continuous mode

Figure 19: VCO output, 1800 band, RX on, continuous output

R 4. 0 dB EF m 10dB / SPA N 1. 000 M z H

W Ag 21 21:23:21 2002 ed u A 10 dB TT A ewB lan _vi _b k M R ER AK 3. 685604 G z H - 3. 97 dB m

RF OS E F 34.0 d B

RW B 10 kH z VB W 10 kH z SW P 50 m s

C TER 3. 685600 G z EN H

SPA 1. 000 M z N H

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Troubleshooting Instructions

Baseband Troubleshooting
The following diagrams describe baseband troubleshooting.

Phone is dead

Phone current is zero?

Yes

Check X100

No

Phone current is <50mA

Yes

Is phone flash proramming OK

Yes

Phone is jammed

No

No

Flash faults

Is phone in LOCAL mode

No

Check BSI line, X100, C240,R203, C100,R206 OK?

Yes

Change UEM

Yes No Repair Ok retest

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Troubleshooting Instructions

CCS Technical Documentation

Phone is jammed

Measure VIO, VCORE, VFLASH1, VANA, VR3 voltages. Are they OK ?

No

Check VBATT1-6 VIO,VCORE,VFLASH1,VANA, No VR3 lines. Are they OK ?

Check X260-265, C260-265, BSI/BTEMP lines and VBATT lines

Yes

Yes

Check BSI/BTEMP lines. If OK, change UEM

Measure 32kHz SleepClk from testpoint J404. No Is it OK ?

Measure 32kHz SleepClkfrom B200. Is it OK ?

No

Check B200,C209, C210

Yes

Yes

Change UEM

Measure 26MHz RFClk from R420. Is it OK ?

No

Measure 26MHz RFCLK from C660. Is it OK ?

No

Check C576, R520,C540. If OK change G501

Yes

Yes

Check R420, C420. If OK change N500

Measure PURX signal from testpoint J402. Is it HIGH (1.8V) ?

No

Change UEM

Yes Phone is jammed 2

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Troubleshooting Instructions

Phone is jammed 2

Phone Shutdown after 30s

Yes

Measure watchdog signal CBUSDA from J414. Is it OK ?

No

Change UPP

No

Yes

Retest Measure DBUSClk 1MHz signal from testpoint J413. Is it OK ?

No

Yes

Read phone info. Is it OK ?

No

Measure FBUSRx signal during phone info read from testpoint J412. Is it OK ?

No

Change UEM

Yes

Yes

Measure FBUSTx signal during phone info read from testpoint J411. Is it OK ?

No

Change UPP

Yes Retest Change UEM

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Troubleshooting Instructions

CCS Technical Documentation

Flash faults

Phone doesn't set FlashBus TxD line HIGH after the startup?

Yes

Measure BSI pulse during Flash programming. Is it OK?

No

Check BSI line, X100, C240, R203, C100, R206

No

Yes

Measure FBusTx line during Flash programming (TP 411) Is it HIGH (1.8V)?

No

Check FBUSTx line. If OK Change UEM

Yes

Phone doesn't set FlashBus TxD line LOW after the line has been set HIGH

Yes

Change UPP

No

Flash faults 2

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Troubleshooting Instructions

Flash faults 2

Wrong manufacturer ID or Device ID

Yes

Change Flash

No

Phone is totally dead

Yes

Phone is dead

No

Phone doesn't start up or phone is jammed

Yes

Phone is jammed

No

Retest

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Troubleshooting Instructions

CCS Technical Documentation

SIM card faults

Insert SIM card faults

Yes

Set phone to LOCAL mode. Is it OK ?

No

Check BSI line, X100, C240, R203, R206. If OK change UEM

No

Yes

Check X386

Measure VSIM voltage from X386. Is it 3V (1.8V)

No

Check VSIM line,X386, C203,C370, L386. If OK change R388. If still wrong VSIM change UEM

Yes

Check SIM power up sequency. Is it OK ?

No

Check SIM lines. If OK change R388. If still fail change UEM.

Yes

Change UPP

END

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CCS Technical Documentation

Troubleshooting Instructions

Display faults

Try to change UI -module. Is it working now ?

Yes

Set phone to LOCAL mode. Set VBATT to 4.2V. Start Display test with Phoenix. Set display ON

No

Board to boad connector fault in displaymodule or faulty module. Retest

Check CALLED1 (N300/8 and DLIGHT (V312/IN).Are they HIGH ? Yes

No

Check lines of CALLED1 and DLIGHT. If lines are OK change UEM

Are display light (LED) turned on ?

No

Yes

Measure voltage over C304. Is it typ. 8.6V ?

No

Check C302,C303,L300,V30 0, R301, R302, R303, R325, C304. If OK change N300

Yes

Measure voltage between J303 and J302 .Is it typ. 7.2V ? Yes

No

Check V311, V312, R311, R312. Retest

Measure voltage between X302, pin 9. Is it typ. 7.2V ?

No

Change X302. Retest

Display faults 2

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Troubleshooting Instructions

CCS Technical Documentation

Display faults

Try to change UI -module. Is it working now ?

Yes

Set phone to LOCAL mode. Set VBATT to 4.2V. Start Display test with Phoenix. Set display ON

No

Board to boad connector fault in displaymodule or faulty module. Retest

Check CALLED1 (N300/8 and DLIGHT (V312/IN).Are they HIGH ? Yes

No

Check lines of CALLED1 and DLIGHT. If lines are OK change UEM

Are display light (LED) turned on ?

No

Yes

Measure voltage over C304. Is it typ. 8.6V ?

No

Check C302,C303,L300,V30 0, R301, R302, R303, R325, C304. If OK change N300

Yes

Measure voltage between J303 and J302 .Is it typ. 7.2V ? Yes

No

Check V311, V312, R311, R312. Retest

Measure voltage between X302, pin 9. Is it typ. 7.2V ?

No

Change X302. Retest

Display faults 2

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Troubleshooting Instructions

Display faults 2

Does the display start ? No

Try to change UI -module. Is it working now ?

Yes

Board to boad connector fault in display module or faulty module. Retest

Yes

No

Measure VDDI/J301 (2.78V) and VDD/J300 (1.8V).Are they OK ?

No

Check lines of VFLASH1 and VIO. If lines are OK change UEM

No

Check signals RESX/J306, SDA/J305,SCLK/J307, CSX/J304. Is it OK ?

No

Check lines of display control. If OK change UPP

Change X302

END

Issue 1 01/03

„Nokia Corporation.

Page 33

Troubleshooting Instructions

CCS Technical Documentation

Audio faults

Is earpiece working ?

No

Try to change UImodule. Is it working now ?

Yes

Check earpiece contact springs from old UI-module and change earpiece and foam to old UI-module. 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 from J310/ J311 and GND pads. Is it ~1.38V ?

No

Check L150, C155, R151 and line. If OK change UEM

Yes

Measure MICB2 voltage from XMIC (L102 input). Is it ~2.2V ? Yes

No

Check L102, C116, C150, R153, R154 and line. If OK change UEM.

Audio faults 2

Earpiece 2

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Troubleshooting Instructions

Audio faults 2

Is microphone working ?

No

Try to change new C-cover assembly. Is it working now ?

Yes

No Yes Restore old C-cover. Set phone to LOCAL mode. Using Phoenix Audiotest set HP IN, EXT OUT, LOOP ON

Check mic contact springs from old C-Cover assembly. If not OK change PopPort assembly to old C-cover. Retest.

Measure MICB1voltage from J110 pad. Is it ~1.38V ?

No

Check L101,L108, C151, C152, C153, R156, R157, R176. If OK change UEM

Yes

Check C151, R157, C105,C154 and line. If OK change UEM if still fail change UPP

Audio faults 3

Issue 1 01/03

„Nokia Corporation.

Page 35

Troubleshooting Instructions

CCS Technical Documentation

Earpiece 2

Connect EXT audio signal 1kHz(sine, 200mVpp) between XMICP and XMICN pads (X101, 11/12)

Measure sine signal from earpiece pads (J310,J311). Is It ~880mVpp ?

No

Measure sine signal from UEM (R151,R152). Is it ~130mVpp ?

Yes

Change UEM

Yes

No Check R151,R152, C155, L150 and lines.

Change UPP

Retest

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Troubleshooting Instructions

Audio faults 3

IHF speaker working ?

No

Try to change new C-cover assembly

Yes

IHF speaker or contact springs fault. Restest

Yes

Yes Restore old C-cover Set phone to local mode with Phoenix. Set buzzer ON, vol "9" and freq. to 1kHz.

END

No Check C173, C174, C175, L151, L152, C170, C171, C172 and IHF PA output lines. Retest.

Measure DClevel between IHF pads J156/J157 to GND. Is it ~1.8V ?

Yes

Measure AClevel between IHF pads (J156,J157). Is it ~1.0Vrms ? No

Speaker contact springs Yes faults. Retest

Check C161, C160,R163, Check signal in C161. C169. No Is it OK ? If OK then change UEM Yes

Check IHF PA controls on J152, J523,J154. Is it OK ?

Change IHF PA (N150) Yes

Change UPP

Issue 1 01/03

„Nokia Corporation.

Page 37

Troubleshooting Instructions

CCS Technical Documentation

Keyboard faults

Is the powerkey working?

No

Measure voltage from S302. Is it HIGH?

Yes

Check R306, C310, S302 and POWERONX line. If OK change UEM

Yes

Yes

Measure voltage from S302 when powerkey is pressed. Is it HIGH ?

Phone is jammed

Yes

Check S302. Is it OK ?

No

Change S302

Yes

Keyboard faults 2

Phone is dead

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Troubleshooting Instructions

Keyboard faults 2

Try to change UI -module. Is it working now ?

Yes

UI connector pad fault in UI-board or faulty UI-module. Retest

No Is UI-module keymatrix working ?

No Measure ROW0-4 lines from X301.Are they HIGH ? No Check ROW0-4 lines, X301. If OK change Z300. If still fails change UPP.

Yes Yes

Measure SLEEPX signal from J403 when key No pressed. Is it ~1.8V ? Yes

Check ROW0-4 lines, X301. If OK change Z300. If still fails change UPP.

When keypad is pressed, the LED's are turned on ?

No

Check ROW0-4 lines, X301. If OK change Z300. If still fails change UPP.

Yes

Keyboard faults 3

Display faults

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„Nokia Corporation.

Page 39

Troubleshooting Instructions

CCS Technical Documentation

Keyboard faults 3 Measure ROW0 line from S300. Is it ~1.8v ? Is volume up key working ? No No Yes

Yes

Check S300, S301 and lines. If OK change Z300. If still fail change UPP

Measure COL1 from S300 when key is pressed. Is there 50us pulse ?

No

Check S300 and COL1 lines. If OK change Z300. If still fail change UPP

Yes Change UPP

Is volume down key working ?

No

Measure ROW0 line from S301. Is it ~1.8v ?

Yes

Check S300, S301 and lines. If OK change Z300. If still fail change UPP

Yes

No

Measure COL4 from S301 when key is pressed. Is there 50us pulse ?

No

Check S301 and COL4 lines. If OK change Z300. If still fail change UPP

Yes Keyboard faults 4 Change UPP

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CCS Technical Documentation

Troubleshooting Instructions

Keyboard faults 4

Try to change UI -module. Is it working now ?

Yes

UI-board pads fault or faulty UI-board. Retest

Set phone to LOCAL mode. Set VBATT to 4.2V. Start Display test with Phoenix. Set "Keyboard lights" ON

No

Check CALLED1 (N300/8 and KLIGHT (V314/IN).Are they HIGH ? Yes

No

Check lines of CALLED1 and KLIGHT. If lines are OK change UEM

Are keyboard light (LED) turned on ?

No

Yes

Measure voltage over C304. Is it typ. 8.6V ?

No

Check C302,C303,L300,V30 0, R301, R302, R303, R325, C304. If OK change N300

Yes

Measure voltage between V313/3. Is it typ. 7.2V ? Yes

No

Check V313, V314, R313, R314

Measure voltage X301, pin 1.Is it typ. 7.2V ?

No

Check X301, R307

End

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Page 41

Troubleshooting Instructions

CCS Technical Documentation

Accesory if faults

Non-ACI accessory detected and No working?

Insert mono headset (HDB-4)

Check ACI line trans.HIGH to LOW (<0.6V) ?

No

Yes

Check PopPort connecor pin 3(ACI) and line to systemboard, L106,R103, R109, C103. If OK change UEM. Retest.

Remove headset

Check ACI line trans. LOW to HIGH. Is it OK ?

No

Yes

Check PopPort connecor pin 3(ACI) and line to systemboard, L106,R103, R109, C103. If OK change UEM. Retest

Audio OK ?

No

Check C107, C108, L103, C114, C119, R105, R106, R164, R165, C157

Accessory if fault 2

Audio fault 3

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CCS Technical Documentation

Troubleshooting Instructions

Accesory if faults

ACI accessory detected and working?

No

Insert stereo headset (HDS-3) Wait 5s

Measure Vout levelPopPort connector pin 4. Is it ~2.8V Yes

No

Check PopPort connecor pin 4(Vout)) and line to systemboard, L107, C102, C112, C101, R111. If ok check GENIO(0) signal on N100/VEN. If it is HIGH, change N100

Reinsert headset

Ref. picture below. Is the start up sequency like it ?

No

Check PopPort connecor pin 3 (ACI) and line to systemboard, L106,R103, R109, C103. If OK change UEM. Retest.

Yes

Audio OK ?

No

Check C107, C108, C109, C117, L103, L104, C113, C114, C118, C119, R105, R106, R107, R108, R164,R165, R166, R167, C157, C158

END

Audio fault 3

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„Nokia Corporation.

Page 43

Troubleshooting Instructions

CCS Technical Documentation

Flashlight faults

Set phone to LOCAL mode. Set VBATT to 4.2V. Start Display test with Phoenix. Set "Flashlight" ON Check CALLED1 (N300/8 and CALLED2 (V320/IN).Are they HIGH ? No

Check lines of CALLED1 and CALLED2. If lines are OK change UEM

Are flashlight (LED) turned on ?

Yes

Yes

Measure voltage over C304. Is it typ. 8.6V ?

No

Check C302,C303,L300,V30 0, R301, R302, R303, R325, C304. If OK change N300

Yes

Measure voltage V317/3 .Is it typ. 7.2V ?

No

Check V320, V317, R315, R316

Yes

Change V318,V319

Display faults 2

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Issue 1 01/03

CCS Technical Documentation

Troubleshooting Instructions

Self tests

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.

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Page 45

Troubleshooting Instructions

CCS Technical Documentation

FM Radio troubleshooting
FM Radio component layout

Figure 20: Component placement

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CCS Technical Documentation
Figure 21: Trace layout.

Troubleshooting Instructions

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.

Figure 22: FM radio block layout.

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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, ≠67.0 dBm - Carrier frequency, fc, 98,000 MHz - Deviation, ,f, 75 kHz - Modulating frequency fm, 1,000 kHz (RF generator internal) - FM stereo, mode R=L, pilot state ON

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Troubleshooting Instructions

Figure 23: FM radio troubleshooting diagram

Set phone into local mode. Start FM radio. Check C374, C375, R375, R358 R372 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. R364, , R368, Start OK R362 now ?

Start OK now

NO

YES Measure Audio signal from C162 and C163. Is it 1kHz 0.5≠0.8Vp≠p?

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 0.5≠0.8 Vp≠p?

YES

Check R164, R165, R166, R167, L103,L104 Measure signal from J103 and J104. Is it 0.015≠0.3 Vp≠p?

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 Vp≠p ? 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

E Nokia Corporation
OK, RETEST IN FLALI

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Page 49

Troubleshooting Instructions Diagrams of FM radio signals

CCS Technical Documentation

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

Figure 24: Oscilloscope screen shot, Audio output

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Troubleshooting Instructions

Figure 25: 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 PEAK LOG 10 dB/ #AT 0 dB MKR 97.9280 MHz -71.03 dBm SWEEP CONT SGL FREE RUN

VIDEO

LINE WA SB CORR SC FS EXTERNAL

SYNC CRD CENTER 98.0000 MHz #RES BW 10 kHz SPAN 300.0 kHz #SWP 1.00 sec TV TRIG

VBW 10 kHz

Figure 26: FM frequency from FM radio pin 37, the other end of L358, with FM test signal
10:46:24 03 JUL 2002 MKR REF .0 dBm PEAK LOG 10 dB/ #AT 10 dB 196.440 MHz -9.40 dB MEAS UNCAL SWEEP CONT SGL FREE RUN

VIDEO

LINE WA SB CORR SC FS EXTERNAL

SYNC CRD CENTER 196.450 MHz #RES BW 10 kHz SPAN 1.000 MHz #SWP 20.0 msec TV TRIG

#VBW 10 kHz

Figure 27: VCO frequency from FM radio pins 3 and 4, the other ends of V356 and V357, with FM test signal

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Troubleshooting Instructions

CCS Technical Documentation

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