Nokia 5100 Service Manual 06 npm6_6x trouble

CCS Technical Documentation

NPM-6/6X Series Transceivers

Troubleshooting Instructions

Issue 2 06/03 Copyright Nokia. All rights reserved.

NPM-6/6X Company confidential

Troubleshooting Instructions CCS Technical Documentation

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CCS Technical Documentation Troubleshooting Instructions

Table of Contents

Page No

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

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

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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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CCS Technical Documentation 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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CCS Technical Documentation 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 con-

nector 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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(EGSM900

CCS Technical Documentation Troubleshooting Instructions

Transmitter troubleshooting diagram

Figure 3: Transmitter troubleshooting

TX troubleshooting

Check output signal level:
+32...+33dBm @897.4 MHz (GSM900)
+29...+30dBm @1747.8 MHz
(GSM1800 & GSM1900)

Check with RF probe
signal level on
PA input >=0dBm (*

start TX power level
tuning and check
tuned RAC values:
Highest level~700...900
Lowest level ~190...210
Base levle ~160...190

Major differences ?

OK ?

TX signal found ?

Yes

OK ?

Yes

No

Check output signal
on 500 MHZ span
Signal found on
incorrect frequency ?

No

*(When 1kOhm passive probe is used,
correct the measurement result by +26dB

Yes

TX OK

Yes

Yes

Check
all power
levels,
OK ?

No

HELGA
troubleshooting

Tune Tx DAC values

No

Yes

Tune
TX power
levels,
OK ?

Synthesizer
troubleshooting

No

Check with oscilloscope:
PA ctrl voltage
>1.5V peak OK ?

Yes

PA & ant switch

troubleshooting

Check control loop
components

No

Yes

Replace
faulty
component(s)

OK ?

Yes

Replace HELGA

dead

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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 RF probe:

Check with RF probe:

-4GVCO out signal

-4G VCO out signal

- 3589.6 MHz (GSM900)

-3589.6MHz (EGSM900)

-3495.6 MHz (GSM1800)

-3495.6 MHz (GSM1800)

- 3760 MHz (GSM1900)

-3760 MHz (GSM1900)

Level >-10dBm (*

Level >-10dBm

OK ?

Check modulator
output components

OK ?

Replace
faulty
component(s)

No

Synthesizer
troubleshooting

*(When 1kOhm passive probe is used,
correct the measurement result by +26dB

Yes

Replace HELGA

dead

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CCS Technical Documentation Troubleshooting Instructions

Figure 5: PA and Antenna Switch troubleshooting

PA & ant switch

troubleshooting

*(When 1kOhm passive probe is used,

Yes

correct the measurement by +26dB

Check with RF probe
signal level on
PA input >=0dBm (*

OK ?

Yes

Check with
oscilloscope:

-VBATT ~4V

- VTXB = 2.8 V pulsed

- VTxLO_GSM = 0V (GSM900)

(EGSM900)

OK ?

Yes

No

Replace
PA

Check components
around PA

OK ?

Yes

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

Replace
HELGA

Replace
ant. switch

No

Replace
faulty
component(s)

No

Replace
faulty
component(s)

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v

Troubleshooting Instructions CCS Technical Documentation

Pictures of transmitter signals

Figure 6: Transmitter signals

TXI

VPC

200mV/div

1

VPCTRL _900 power level high at R703/C703
VPCTRL_1800/1900 power level high at R704/C704

500mV/div 100us/div

VANT_1 / EGSM900 TX at C804
VANT_2 / GSM1800 TX at C835

100us/di

VANT_3 / GSM1900 TX at C805 OV
( no signal/ Flatline on Oscilloscope screen)

200mV/div

100us/div

TX I/Q at R516/517 power level high Random data

_

1

500mV/div 100us/div

VANT_1,VANT_2,VANT_3

500mV/div MTB 100us/div

VTXB_900 at C713
VTXB_1800_1900 at C714

500mV/div 100us/div

TXP at J504

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CCS Technical Documentation Troubleshooting Instructions

Figure 7: TX OUT signal

GS MPOW Tue Sep 25 13: 48: 59 2001
REF 4 1. 0 d Bm ATT 4 0 d B
10dB/

REF OFS

11. 0 dB

RBW

100 kHz

VBW

100 kHz

SWP

2. 0 s
CENTER 897. 400 MHz SPAN 2. 000 MHz

Tx out signal, 900 band, burst mode, channel 37

A_wr i t eB_bl ank

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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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CCS Technical Documentation 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 CCS Technical Documentation

Troubleshooting diagram for EGSM900 receiver

Phone in “Continuous” mode, AGC setting “12”

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

Yes

900RX chain
functional

No

Change ge­nerator level
to –50dBm

Spectrumanalyzer

Spectrumanalyzer
Antenna Switch

Antenna Switch

outputs, GSM900

outputs,EGSM900

–88 dBm

-88dBm

Yes

Spectrumanalyzer
HELGA inputs
GSM900

EGSM900 -89dBm

–89 dBm

Yes

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

NoYes

No

No

Spectrumanalyzer
Antenna Switch
input
–84 dBm

Yes

Oscilloscope
VANT_1...3 0V

Yes

Check Antenna
switch
Z800

Check L809
L810

Check Base­band

No

Check C831,

L811

Oscilloscope :
Check HELGA
serial interface
(burst mode)

Check HELGA
N500

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.

* Spectrumanalyzer
reading with 1 kohm
passive probe (right val­ue add +34 dB)

NoNo

Check Base­band

Yes

Spectrumanalyzer
4G VCO out

3769.6MHz
∼–30 dBm (*

Yes

Check HELGA
N500

No

Synthesiszer trou­bleshooting

* ** DC–level of RXI/RXQ in
continuous mode will decrease
slowly.
The original level can be resto­red by rewriting gain set.

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N500

CCS Technical Documentation 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

NoNoYesNoYes

Oscilloscope at RX_I
Signal 140mVpp
DC offset 1.35V ***
Frequency 67.7kHz

Yes

Change ge­nerator level
to –50dBm

Spectrumanalyzer
Antenna switch out­puts,
1800 LNA out
–61 dBm

Spectrumanalyzer

Antenna Swithc input

-84 dBm

Check C831,
L811

GSM1800 RX chain
functional

Yes

Spectrumanalyzer
HELGA inputs
GSM 1800
–88 dBm

Yes

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

Yes

Spectrumanalyzer
4G VCO out

3769.6MHz
∼–30 dBm (*

Yes

Check HELGA
N500

No

No

No

Oscilloscope
VANT_1...3 0V

Check Antenna
Switch Z800

Check C838, C839,
L821. L 872,
C836, C837,
V801

Synthesiszer trou­bleshooting

Yes

Yes

Check Base­band

Oscilloscope
Check HELGA se­rial interface (burst
mode)

Yes

Check Helga

Check HELGA

N500

N600

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
reading with 1 kohm
passive probe (right val­ue add +26 dB)

* ** DC–level of RXI/RXQ in
continuous mode will decrease
slowly.
The original level can be resto­red by rewriting gain set.

NoNo

Check Base­band

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Z806

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

NoNoYesNoYes

Oscilloscope at
RX_I /RXQ
Signal 160mVpp
DC offset 1.35V ***
Frequency 67.7kHz

Change ge­nerator level
to –50dBm

Spectrumanalyzer
Antenna Switch out­put, GSM1900
–88 dBm

Spectrumanalyzer
Antenna Switch input
–84 dBm

Check C831,
L811

Yes

GSM1800 RX chain
functional

Spectrumanalyzer
HELGA inputs
GSM1900
–78 dBm

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

Yes

Spectrumanalyzer
4G VCO out

3685.6MHz
∼–30 dBm (*

Yes

Check HELGA
N500

Spectrumanalyzer
RX_SAW_out

Yes

–90 dBm

Oscilloscope
LNA_VCC 2.6V
LNA_P 0 V

Check V802,
C826, Z802,
C829, C8097,
C808

Check Baseband

Synthesiszer trou­bleshooting

Yes

Oscilloscope
VANT_3 2.7VV
VANT_1/2 0V

Check Antenna
switch Z800

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

Yes

Yes

Yes

Check HELGA
N500

Oscilloscope
Check HELGA se­rial interface (burst
mode)

Yes

Check HELGA
N500

Check Baseband

Check Baseband

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
reading with 1 kohm
passive probe (right val­ue add +26 dB)

* ** DC–level of RXI/RXQ in
continuous mode will decrease
slowly.
The original level can be resto­red by rewriting gain set.

NoNo

Check Base­band

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CCS Technical Documentation 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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Check with RF

(

Troubleshooting Instructions CCS Technical Documentation

Synthesizer troubleshooting diagram

Figure 14:

Synthesizer

troubleshooting

*(When 2.5kOhm passive probe is used,

Yes

correct the measurement by +34 dB

Set with RF controls:
Active Unti = Rx
Operation mode = Continuous

Check with RF probe:

-4G VCO out signal

-4G VCO out signal

-3589.6 MHz (EGSM900)

- 3589.6 MHz (GSM900)

-3495.6 MHz (GSM1800)

-3495.6 MHz (GSM1800)

-3760 MHz

- 3760 MHz (GSM1900)
Level >-10dBm (*

VCO out signal level<-10dBm

Check output signal on
1 GHz span
Signal found on
incorrect frequency ?

probe:

GSM1900)

OK ?

No

No

Yes

Yes

Synthesizer
OK

Yes

Check with oscilloscope:

-4G VCO Vcc = 2.7V

No

Check balun
output levels and
solder joints
OK ?

No

Replace
faulty
component(s)

OK ?

No

Yes

Yes

Baseband
troubleshooting

Replace
VCO

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

Yes

OK ?

Replace
VCO

No

Replace
faulty
component(s)

No

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CCS Technical Documentation Troubleshooting Instructions

Pictures of synthesizer signals

Figure 15: 26MHz at G501 pin out

Figure 16:

Figure 17: 1800 TX, channel 512, burst mode

26MHz RFCLK at R420/C420

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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

REF 4 . 0 dBm ATT 10 dB
10dB

SPAN

1. 000 MHz

REFOFS

34. 0 dB

RBW

10 kHz

VBW

10 kHz

SWP

50 ms

CENTER 3. 685600 GHz SPAN 1. 000 MHz

Wed Aug 21 21: 23: 21 2002

A_vi ew B_bl ank

MARKER

3. 685604 GHz

-3.97 dBm

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CCS Technical Documentation Troubleshooting Instructions

Baseband Troubleshooting

BB Measurement points

Figure 20: NPM-6 BB Measurement points, Top

GND
VBATT
BSI
BSI

FLSCSX
FLS2CSX
EXTRDX
EXTWRX
FLSCLK

UEMINT
DBUSCLK
SLEEPX
DBUSDA
PURX
DBUSEN1X
SLEEPCLK

MBUSTX
FBUSRX
CBUSDA
CBUSENX
MBUSRX
FBUSTX
CBUSCLK

CSX
VDD
SCLK
GND
SDA
VLED­ RESX
VLED+
VDDI

VCORE
VFLASH2
VFLASH1
VANA

VSIM
VIO

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Troubleshooting Instructions CCS Technical Documentation

Figure 21: NPM-6 BB Measurement points, Bottom

SIMRST
SIMCLK
SIMDATA

VPP
MBUS
GND
FBUSRX
FBUSTX

VSIM
CHARGE GND
CHARGE

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CCS Technical Documentation Troubleshooting Instructions

Troubleshooting diagrams

The following diagrams describe baseband troubleshooting.

Phone is dead

Phone current is

zero?

No

Phone current is

<50mA

No

Yes

Yes

Is phone flash

proramming OK

No

Yes

Check X100

Phone is

jammed

Flash faults

Check BSI line, X100,

Is phone in LOCAL

mode

Yes

Ok retest

No

C240,R203,

C100,R206

OK?

No

Yes

Change UEM

Repair

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 27

NPM-6/6X Company confidential

Troubleshooting Instructions CCS Technical Documentation

Phone is jammed

Measure VIO, VCORE,

VFLASH1, VANA,

VR3 voltages.
Are they OK ?

Yes

Measure 32kHz

SleepClk from testpoint J404.

Is it OK ?

Yes

Measure 26MHz

RFClk from R420.

Is it OK ?

Check VBATT1-6

VIO,VCORE,VFLASH1,VANA,

No

No

No

VR3 lines.

Are they OK ?

Measure 32kHz

SleepClkfrom B200.

Is it OK ?

Measure 26MHz

RFCLK from C660.

Is it OK ?

Yes

Yes

No

No

No

Check X260-265,

C260-265, BSI/BTEMP

lines and VBATT lines

Check BSI/BTEMP

lines. If OK, change

UEM

Check B200,C209,

C210

Change UEM

Check C576,

R520,C540.

If OK change G501

Yes

Measure PURX signal

from testpoint J402.

Is it HIGH (1.8V) ?

Yes

Phone is

jammed

2

Yes

No

Check R420, C420.

If OK change N500

Change UEM

Page 28 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

CCS Technical Documentation Troubleshooting Instructions

Phone is

jammed

2

Measure

Phone Shutdown

after 30s

Yes

watchdog signal

CBUSDA from J414.

Is it OK ?

No

Change

UPP

No

Measure

DBUSClk 1MHz signal

from testpoint J413.

Is it OK ?

Yes

Read phone info.

Is it OK ?

Yes

No

No

Yes

Retest

Measure FBUSRx
signal during phone info
read from testpoint J412.

Is it OK ?

Yes

No

Change

UEM

Measure FBUSTx

Change

UPP

Change

UEM

Retest

signal during phone info
read from testpoint J411.

Is it OK ?

Yes

No

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 29

NPM-6/6X Company confidential

Troubleshooting Instructions CCS Technical Documentation

Flash faults

Phone doesn't set

FlashBus TxD line HIGH after the

startup?

No

Yes

Measure BSI pulse during

Flash programming.

Is it OK?

Yes

Measure FBusTx line during
Flash programming (TP 411)

Is it HIGH (1.8V)?

Yes

No

No

Check BSI
line, X100,

C240, R203,

C100, R206

Check

FBUSTx line. If

OK

Change UEM

Phone doesn't set

FlashBus TxD line LOW after the

line has been set HIGH

No

Flash faults

2

Yes

Change UPP

Page 30 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

CCS Technical Documentation Troubleshooting Instructions

Flash faults

2

Wrong manufacturer

ID or Device ID

No

Phone is totally dead

No

Phone doesn't start

up or phone is jammed

Yes

Yes

Yes

Change Flash

Phone is dead

Phone is

jammed

No

Retest

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 31

NPM-6/6X Company confidential

Troubleshooting Instructions CCS Technical Documentation

SIM card

faults

Insert SIM card faults

No

Yes

Set phone to

LOCAL mode.

Is it OK ?

Yes

Check X386

Measure VSIM

voltage from X386.

Is it 3V (1.8V)

Yes

No

No

Check BSI line, X100,

C240, R203, R206. If

OK change UEM

Check VSIM

line,X386,

C203,C370, L386. If

OK change R388. If

still wrong VSIM

change UEM

END

Check SIM

power up sequency.

Is it OK ?

Yes

Change UPP

No

Check SIM lines. If

OK change R388. If

still fail change UEM.

Page 32 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

CCS Technical Documentation Troubleshooting Instructions

Display faults

Set phone to LOCAL mode. Set

VBATT to 4.2V. Start Display

test with Phoenix. Set display

ON

Are display light

(LED) turned on ?

Yes

No

Try to change

UI -module. Is it

working now ?

No

Check CALLED1

(N300/8 and DLIGHT

(V312/IN).Are

they HIGH ?

Yes

Measure

voltage over C304.

Is it typ. 8.6V ?

Yes

Yes

No

No

Board to boad
connector fault in
displaymodule or

faulty module.

Retest

Check lines of

CALLED1 and

DLIGHT. If lines are

OK change UEM

Check
C302,C303,L300,V30
0, R301, R302, R303,

R325, C304.

If OK change N300

Display faults

2

Measure

voltage between J303

and J302 .Is it

typ. 7.2V ?

Yes

Measure

voltage between X302,

pin 9. Is it
typ. 7.2V ?

No

No

Check V311, V312,

R311, R312.

Retest

Change X302.

Retest

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 33

NPM-6/6X Company confidential

Troubleshooting Instructions CCS Technical Documentation

Display faults

Set phone to LOCAL mode. Set

VBATT to 4.2V. Start Display

test with Phoenix. Set display

ON

Are display light

(LED) turned on ?

Yes

No

Try to change

UI -module. Is it

working now ?

No

Check CALLED1

(N300/8 and DLIGHT

(V312/IN).Are

they HIGH ?

Yes

Measure

voltage over C304.

Is it typ. 8.6V ?

Yes

Yes

No

No

Board to boad
connector fault in
displaymodule or

faulty module.

Retest

Check lines of

CALLED1 and

DLIGHT. If lines are

OK change UEM

Check
C302,C303,L300,V30
0, R301, R302, R303,

R325, C304.

If OK change N300

Display faults

2

Measure

voltage between J303

and J302 .Is it

typ. 7.2V ?

Yes

Measure

voltage between X302,

pin 9. Is it
typ. 7.2V ?

No

No

Check V311, V312,

R311, R312.

Retest

Change X302.

Retest

Page 34 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

CCS Technical Documentation Troubleshooting Instructions

Display faults

2

Board to boad

connector fault in

display module or faulty

module.

Retest

Does the display start ?

Try to change

No Yes

UI -module. Is it

working now ?

Yes

No

Measure VDDI/J301

(2.78V) and VDD/J300

(1.8V).Are

they OK ?

No

Check signals

RESX/J306,

SDA/J305,SCLK/J307,

CSX/J304.

Is it OK ?

Change X302

No

No

Check lines of

VFLASH1 and VIO. If

lines are OK change

UEM

Check lines of display

control. If OK change

UPP

END

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 35

NPM-6/6X Company confidential

Troubleshooting Instructions CCS Technical Documentation

Audio faults

Check earpiece

contact springs from

Is earpiece

working ?

Yes

Try to change UI-

No Yes

module. Is it working

now ?

No

Change old UI -module back.Set

phone to LOCAL mode. Using

Phoenix Audiotest set EXT IN, HP

OUT, LOOP ON

old UI-module and

change earpiece and

foam to old

UI-module.

Retest.

Measure DC-

offset voltage from J310/ J311 and

GND pads. Is it ~1.38V ?

Yes

Measure

MICB2 voltage from

XMIC (L102 input).

Is it ~2.2V ?

Yes

No

No

Check L150, C155,

R151 and line.

If OK change UEM

Check L102, C116,

C150, R153, R154

and line.

If OK change UEM.

Audio faults

2

Earpiece

2

Page 36 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

CCS Technical Documentation Troubleshooting Instructions

Audio faults

2

Is microphone

workin g ?

Yes

Try to change new

No

C-cover assembly. Is it

workin g now ?

No

Restore old C-cover. Set phone to

LOCAL mode. Using Phoenix

Audiotest set HP IN, EXT OUT,

LOOP ON

Measure MICB1-

voltage from J110 pad.

Is it ~1.38V ?

Yes

Check C151, R157,

C105,C154 and line.

If OK change UEM if still

fail change UPP

Yes

No

Check mic contact springs

from old C-Cover assembly.

If not OK change PopPort

assembly to old C-cover.

Retest.

Check L101,L108, C151,

C152, C153, R156,

R157, R176.

If OK change UEM

Audio faults

3

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 37

NPM-6/6X Company confidential

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 ?

Yes

Change UPP

Retest

No

Measure sine

signal from UEM

(R151,R152).

Is it ~130mVpp ?

No

Yes

Change UEM

Check R151,R152,

C155, L150 and lines.

Page 38 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

CCS Technical Documentation Troubleshooting Instructions

Audio faults

3

IHF speaker or

IHF speaker working ?

No Yes

Try to change new

C-cover assembly

contact springs

fault.

Restest

Yes

END

Check C173,

C174, C175, L151, L152,

C170, C171, C172 and

IHF PA output lines.

Retest.

Yes

Restore old C-cover

Set phone to local mode with Phoenix.

Set buzzer ON, vol "9" and freq. to 1kHz.

Measure DC-

level between IHF

No

pads J156/J157 to

GND.

Is it ~1.8V ?

Yes

Measure AC-

level between IHF

pads (J156,J157).

Is it ~1.0Vrms ?

No

Check signal in C161.

Is it OK ?

Yes

Speaker

contact springs

Yes

No

faults.
Retest

Check C161,

C160,R163,

C169.

If OK then

change UEM

Check IHF PA

controls on J152,

J523,J154.

Is it OK ?

Change UPP

Change IHF PA

Yes

(N150)

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 39

NPM-6/6X Company confidential

Troubleshooting Instructions CCS Technical Documentation

Keyboard

faults

Is the powerkey

working?

Yes

Measure voltage

No Yes

from S302 when powerkey is

from S302.
Is it HIGH?

Yes

Measure voltage

pressed.

Is it HIGH ?

Yes

Check S302.

Is it OK ?

No

Check R306,

C310, S302 and

POWERONX line.

If OK change UEM

Phone is

jammed

Change S302

Yes

Keyboard

faults

2

Phone is

dead

Page 40 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

CCS Technical Documentation Troubleshooting Instructions

Keyboard

faults

2

Is UI-module

keymatrix working ?

Yes

No

Try to change

UI -module. Is it

working now ?

No

Measure ROW0-4

lines from X301.Are

they HIGH ?

Yes

Measure SLEEPX signal

from J403 when key

pressed.

Is it ~1.8V ?

Yes

Yes

No

No

UI connector pad fault in

UI-board or faulty

UI-module.

Retest

Check ROW0-4 lines,

X301. If OK change

Z300. If still fails change

UPP.

Check ROW0-4 lines,

X301. If OK change

Z300. If still fails change

UPP.

Keyboard

faults

3

When keypad is

pressed, the LED's are

turned on ?

Yes

Display

faults

No

Check ROW0-4 lines,

X301. If OK change

Z300. If still fails change

UPP.

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 41

NPM-6/6X Company confidential

Troubleshooting Instructions CCS Technical Documentation

Keyboard

faults

3

Measure ROW0

Is volume up key

working ?

Yes

line from S300.

Is it ~1.8v ?

No

No

Yes

Check S300, S301

and lines. If OK

change Z300.

If still fail change UPP

Is volume down key

working ?

Yes

No

Measure COL1 from

S300 when key is pressed.

Is there 50us pulse ?

Yes

Measure ROW0

line from S301.

Is it ~1.8v ?

No

Measure COL4 from

S301 when key is pressed.

Is there 50us pulse ?

No

No

Yes

Check S300 and COL1

lines. If OK change

Z300.

If still fail change UPP

Change UPP

Check S300, S301 and

lines. If OK change

Z300.

If still fail change UPP

Check S301 and COL4

lines. If OK change

Z300.

If still fail change UPP

Yes

Keyboard

faults

4

Change UPP

Page 42 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

CCS Technical Documentation Troubleshooting Instructions

Keyboard

faults

4

Set phone to LOCAL mode. Set

VBATT to 4.2V. Start Display

test with Phoenix. Set

"Keyboard lights" ON

Are keyboard

light (LED)

turned on ?

Yes

No

Try to change

UI -module. Is it

working now ?

No

Check CALLED1

(N300/8 and KLIGHT

(V314/IN).Are

they HIGH ?

Yes

Measure

voltage over C304.

Is it typ. 8.6V ?

Yes

Yes

No

No

UI-board pads fault or

faulty UI-board.

Retest

Check lines of
CALLED1 and

KLIGHT. If lines are

OK change UEM

Check

C302,C303,L300,V30

0, R301, R302, R303,

R325, C304.

If OK change N300

End

Measure

voltage between

V313/3. Is it

typ. 7.2V ?

Yes

Measure

voltage X301, pin 1.Is it

typ. 7.2V ?

No

No

Check V313, V314,

R313, R314

Check X301, R307

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 43

NPM-6/6X Company confidential

Troubleshooting Instructions CCS Technical Documentation

Accesory if

faults

Check PopPort

connecor pin

Non-ACI

accessory detected and

working?

Insert mono

No No

headset

(HDB-4)

Check ACI line

trans.HIGH to LOW

(<0.6V) ?

Yes

Remove

headset

3(ACI) and line to

systemboard,

L106,R103, R109,

C103. If OK

change UEM.

Retest.

Check ACI line

trans. LOW to HIGH. Is

it OK ?

Yes

Audio OK ?

Check PopPort

connecor pin

3(ACI) and line to

No

No

systemboard,

L106,R103, R109,

C103. If OK

change UEM.

Check C107,
C108, L103, C114,
C119, R105, R106,

R164, R165, C157

Retest

Accessory if

fault

2

Audio fault

3

Page 44 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

CCS Technical Documentation Troubleshooting Instructions

Accesory if

faults

Check PopPort

connecor pin

4(Vout)) and line to

systemboard, L107,

C102, C112, C101,

No

R111. If ok check

GENIO(0) signal on

N100/VEN. If it is

HIGH, change N100

ACI

accessory detected

and working?

No

Insert stereo

headset

(HDS-3)

Wait 5s

Measure Vout

levelPopPort connector

pin 4.

Is it ~2.8V

Yes

Reinsert

headset

Ref. picture

below. Is the start up

sequency like it ?

Yes

Audio OK ?

Check PopPort

connecor pin 3 (ACI)

and line to

No

No

systemboard,

L106,R103, R109,

C103. If OK change

UEM. Retest.

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

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 45

NPM-6/6X Company confidential

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 ?

Yes

Measure

voltage V317/3 .Is it

typ. 7.2V ?

Yes

No

No

Check

C302,C303,L300,V30

0, R301, R302, R303,

R325, C304.

If OK change N300

Check V320, V317,

R315, R316

Change V318,V319

Display faults

2

Page 46 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

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.

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 47

NPM-6/6X Company confidential

Troubleshooting Instructions CCS Technical Documentation

FM Radio troubleshooting

FM Radio component layout

Figure 22: Component placement

Page 48 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

CCS Technical Documentation Troubleshooting Instructions

Figure 23: Trace layout.

Figure 24: 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.

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 49

NPM-6/6X Company confidential

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 f

, 1,000 kHz (RF generator internal)

m

- FM stereo, mode R=L, pilot state ON

Page 50 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

CCS Technical Documentation Troubleshooting Instructions

Figure 25: FM radio troubleshooting diagram

Set phone into local mode.

Start FM radio.

Does

the radio

start ?

YES

Connect RF test signal (note1)
Set radio channel to 98.0 MHz

Set radio volume to max.

Measure

Audio signal

from C162 and

C163.

Is it 1kHz

0.5–0.8Vp–p?

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?

NO

Check

R359,R360,

V356, V357,

L356,L357,C357,

C358,C362.

Measure

signal from

J103, J104,

OK ?

NO

Change

N356.

Measure signal

from J103 and J104.

Is it

OK ?

Check

NO NO

YES

YES

YES

YES

C374, C375, R375,
R358 and measure

R372

32kHz clock signal

from J359,

retest starting.

Start OK ?

YES

Check
R164,

R165, R166,

R167, L103,L104

Measure

signal from J103

and J104.

Is it

0.015–0.3
Vp–p?

YES

NO

Measure

voltages from

pins 7 and 34,

is it –2.7 V ?
Retest starting.
Start OK now ?

OK, RETEST IN FLALI

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 ?

V356, V357, L356,

L357, C357, C358, C362,

R359, R360.

T est again with

87.5 and 108.0 MHz.
Measure audio from

C162 and C163.

NO

87.5 and 108.0 MHz.
Measure audio from

C162 and C163.

NO

Set

Check

Both
OK?

Change

V356 and 357.

BOTH !

Retest with

Both OK ?

NO

NO

(pins 5,6,7,8,9,11,

12,13,17,33,34,35,

Check

:

N356 solders

36, 37.

,R364,

R368,

Start OK

R362

now ?

Start OK

now

YESYES

YES

YES

NO

Change

N356.

Radio start

OK

now?

NO

Baseband digital

fault (UPP)

YES

Audio

Amplifier

failure

(N150)

NO

Change

radio module TB4

OK, RETEST IN FLALI

E Nokia Corporation

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 51

NPM-6/6X Company confidential

Troubleshooting Instructions CCS Technical Documentation

Diagrams of FM radio signals

Figure 26: 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

Page 52 Copyright Nokia. All rights reserved. Issue 2 06/03

Company confidential NPM-6/6X

CCS Technical Documentation Troubleshooting Instructions

Figure 27: FM radio clock from test point J359, 32 kHz frequency clock signal, when radio is on.

15:51:49 03 JUL 2002

#AT 0 dBREF -20.0 dBm

PEAK
LOG

10
dB/

WA SB

CORR

SC FS

CENTER 98.0000 MHz SPAN 300.0 kHz

#RES BW 10 kHz VBW 10 kHz #SWP 1.00 sec

MKR 97.9280 MHz

-71.03 dBm
SWEEP

CONT SGL

FREE RUN

VIDEO

LINE

EXTERNAL

SYNC CRD

TV TRIG

Figure 28: FM frequency from FM radio pin 37, the other end of L358, with FM test signal

10:46:24 03 JUL 2002

PEAK
LOG

10
dB/

#AT 10 dBREF .0 dBm

MKR

196.440 MHz

-9.40 dB

MEAS UNCAL

SWEEP

CONT SGL

FREE RUN

VIDEO

LINE

WA SB

CORR

SC FS

CENTER 196.450 MHz SPAN 1.000 MHz

#RES BW 10 kHz #VBW 10 kHz #SWP 20.0 msec

EXTERNAL

SYNC CRD

TV TRIG

Figure 29: VCO frequency from FM radio pins 3 and 4, the other ends of V356 and V357, with FM test signal

Issue 2 06/03 Copyright Nokia. All rights reserved.. Page 53

NPM-6/6X Company confidential

Troubleshooting Instructions CCS Technical Documentation

Page 54 Copyright Nokia. All rights reserved. Issue 2 06/03