Nokia 3510i Service Manual 9 rh 9 trouble

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Page 1

CCS Technical Documentation

RH-9 Series Transceivers

Troubleshooting Instructions

Issue 1 11/02 ãNokia Corporation

Page 2

RH-9

Troubleshooting Instructions CCS Technical Documentation

Page No

Introduction....................................................................................................................4

Baseband Testpoints ...................................................................................................... 5

Fault Finding Charts....................................................................................................... 6

Phone is dead ...............................................................................................................7

Flash programming does not work ..............................................................................8

Power does not stay on or phone is jammed ................................................................9

Display information: "Contact Service" ....................................................................10

The phone does not register to the network, or the phone cannot make a call ..........11

SIM related faults ......................................................................................................12

Insert SIM card fault ............................................................................................... 12

SIM-Card rejected................................................................................................... 13

Audio related faults ....................................................................................................14

Charging failure .........................................................................................................16

RF Troubleshooting ..................................................................................................... 18

General description of the RF circuits..................................................................... 18

Receiver................................................................................................................... 24

General Instructions for GSM900 RX Troubleshooting......................................... 24

Fault Finding Chart for GSM900 Receiver............................................................. 26

General Instructions for GSM1800 RX Troubleshooting....................................... 27

Fault Finding Chart for GSM1800 Receiver........................................................... 29

Measurement points in the receiver ........................................................................ 31

Transmitter .................................................................................................................32

Measurement points for the transmitter .................................................................. 32

General instructions for GSM TX troubleshooting................................................. 33

Fault finding chart for GSM900 transmitter ........................................................... 34

PCN TransmitterGeneral instructions for PCN TX troubleshooting...................... 37

Synthesizer .................................................................................................................39

General instructions for Synthesizer troubleshooting ............................................. 39

26 MHz Reference Oscillator ( VCXO )................................................................. 39

VCO ........................................................................................................................ 41

Fault finding chart for PLL Synthesizer.................................................................. 41

Measurement points for the PLL............................................................................. 42

Frequency lists......................................................................................................... 45

Alignment ..................................................................................................................47

NHM-8NX manual align with Phoenix .................................................................. 47

RX calibration ............................................................................................................47

RX channel select filter .............................................................................................49

RX Band Filter Response ..........................................................................................50

Tx Power tuning ........................................................................................................51

TX power tuning GSM............................................................................................ 52

TX power tuning PCN............................................................................................. 55

I/Q tuning ...................................................................................................................57

RF control ..................................................................................................................59

Call testing .................................................................................................................60

List of Figures

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Fig 1 Receiver signal path ...................................................................................................19

Fig 2 Transmitter signal path...............................................................................................20

Fig 3 Synthesiser..................................................................................................................21

Fig 4 Key component location.............................................................................................22

Fig 5 Power supply configuration........................................................................................23

Fig 6 Supply points at UEM (D200)...................................................................................24

Fig 7 Supply point at Mjoelner (N600) ...............................................................................24

Fig 8 EGSM Receiver fault finding chart............................................................................26

Fig 9 RX900 I/Q signal waveform ......................................................................................27

Fig 10 GSM1800 receiver fault finding chart......................................................................29

Fig 11 RX1800 I/Q signal waveform ..................................................................................30

Fig 12 RX measurements point at the RX/TX Switch - Z700.............................................31

Fig 13 Measurements points at the RX-Filters – Z601/Z602 ..............................................31

Fig 14 RX I/Q Signals, Baseband shielding can UEM (D200)...........................................32

Fig 15 TX measuremnet points in the PA ( N700 ) shielding can.......................................32

Fig 16 EGSM900 transmitter fault finding chart.................................................................35

Fig 17 VPCTRL_G & TXC.................................................................................................36

Fig 18 GSM1800 transmitter fault finding chart .................................................................38

Fig 19 VPCTRL_P & TXC ................................................................................................39

Fig 20 VCXO 26 MHz waveform .......................................................................................40

Fig 21 PLL fault finding chart .............................................................................................41

Fig 22 Measurement point for VCXO supply .....................................................................42

Fig 23 Measurement point for VCXO output......................................................................43

Fig 24 Measurement point for PLL .....................................................................................43

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Troubleshooting Instructions CCS Technical Documentation

Introduction

This document contains the Popeye fault finding charts. Furthermore it includes the baseband testpoint guide. This document is based on the PIPPI troubleshooting document.

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Baseband Testpoints

J416

EXTWRX

J419

FLSCLK

J420

FLSCSX

J417

EXTRDX

J418

FLS2CSX

J414

DBUSDA

J402

PURX

J415

DBUSEN1X

J404

SLEEPCLK

J408

CBUSENX

J406

CBUSCLK

J407

CBUSDA

PIN 6

SIM I/O

PIN 4 GND

PIN 3 VSIM

PIN 2

RST

PIN 1

CLK

J425

RFCLK

J601

RXQP

J412

FBUSRX

J411

FBUSTX

J601 RXIM

C156

MIC2P

C155

MIC2N

C218

VIO

J409

MBUSTX

J410

MBUSRX

J603

RXQM

J413

DBUSCLK

J405

UEMINT

J600 RXIP

C231

VREFRF01

C225

VR6

C227

VR3

C226

VR5

C223

VR2

C224

VR7

C208

VCORE

C206

VANA

C205

VFLASH1

R183/1

HFCM

C157

HEADINT

R183/2

PRODTP6

VPP

PRODTP2

FBUS TX

J150

HOOKINT

R310

KLIGHT

R166

MICB2

R164

MIC1P

R165

MICB1

R164

MIC1N

PRODTP7

MBUS

PRODTP3

FBUS RX

R161/1

EARP

R161/2

EARN

C100

VCHARIN

V1.0

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Fault Finding Charts

In this section, fault finding charts are provided for the most common Popeye errors.

NOTE: Since both D200 (UEM) and D400(UPP) is underfilled, they can not be replaced. If either D200 or D400 is defective, the whole PWB has be discarded.

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Phone is dead

It is assumed that the voltage supplied is 3.6 VDC. The UEM will prevent any functionality what so ever at battery/supply levels below 2.9 VDC

Phoneisdead

Yes

X101

VBAT = 3,6VDC

Yes

Z261, C261, Z264,

C264

Voltage = 3,6VDC

Yes

S300

Pin1&3isHIGHwhen

power-key is untouched

Yes

S300

Pin 1 & 3 is 0VDC(LOW)

when power-key is pressed

Yes

J404

Sleep-clock is

32.768 kHz, 1,8Vpp

Yes

J402

PURX = 1,8VDC,

1 sec. after power-key

is pressed

Yes

Z261, C261, Z264, C264

B200, C209, C210, PWB.

Check :

X101

Check :

R317, C310

Check :

S300, PWB

Check :

Else def ective D200*

Check :

PWB.

Else def ective D200*

C227

VR3 = 2,78VDC

Yes

J425

26 MHz clock min.

300mVACpp,

probe Cin=10-13 pF/10M

Yes

Check :

D450 + D452.

Else defective D200*

Check :

C227, PWB.

Else def ective D200*

Check :

C227, PWB.

Else def ective D200*

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Flash programming does not work

The flash programming can only be done via the pads on the PWB (J100).

In case of Flash failure in FLALI station, problem is most likely related to SMD problems. Possible failures could be short-circuit of balls under µBGAs (UEM, UPP, FLASH). Missing or misaligned components.

In flash programming error cases the flash prommer can give some information about a fault. The fault information messages could be:

- Phone does not set FBUS_TX line low

Because of the use of uBGA components it is not possible to verify if there is a short circuit in control- and address lines of MCU (UPP) and memory (flash).

Flash prgramming

do not work

Error from prommer:

"Phone doesn't set FBUS_TX line low"

Yes

J100, R108

Check connection between

pad 1,2 & 3 on J100

and R108

Yes

J409, J410, J411, J412

Voltage level at 1,8VDC

Yes

Try reading MCU ID

with Phoenix.

Reading OK?

Yes

Try reading Flash ID

with Phoenix.

Reading OK?

Check :

R108, PWB

Check :

PWB.

Else defective D200*

Check :

PWB.

Else defictive D400*

Check :

Replace D450 / D452

Yes

Reflash phone

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Power does not stay on or phone is jammed

If this kind of failure is presenting itself immediately after FLALI, it is most likely caused by ASICs missing contact with PWB.

If for some reason the MCU does not service the watchdog register within the UEM, the operations watchdog will run out after approximately 32 seconds. Unfortunately, the service routine cannot be measured.

Power doesn't stay on,

or phone is jammed

J404

Sleep clock = 32.768 kHz,

1.8Vpp

Yes

J402

PURX = 1,8VDC,

1 sec. after power-key is

pressed

Yes

UI functionality,

and keys react

to pressure?

Yes

J425

26 MHz clock min.

300mVACpp,

probe Cin=10-13 pF/10M

Yes

Reflash phone

B200, C209, C210, PWB.

Check :

Else defective D200*

Check :

PWB.

Else defictive D200*

Check :

D450/D452, Keymat,

Lightguide, PW B.

Else defective D400*

Check :

C420, C426, R420,

R426, N600(Mjoelner)

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Display information: "Contact Service"

This error can only happen at power up where several self-tests are run. If any of these test cases fail, the display will show the message: "Contact Service".

The individual test cases are individual so the below line-up of error hunting has no chronological order. Use common sense and experience to decide which test case to start error hunting at.

Display shows

"Contact Service"

Yes

AuxDa & UEMInt

SleepX & SleepClk

between UPP & UEM?

TXI/QD&RXI/QD?

SIM interface between

EarDa & MicDa

between

UPP and UEM?

MBUS interface

between

UPP and UEM?

between

UPP and UEM?

UPP & UEM

Key is stucked

R205

Check R205

(no short/open-circuit)

Check :

A-cover, Keymat, Lightguide,

PWB.

Check :

PWB.

Else defective D200*

or D400*

Error still present

Flash checksum

 ASIC version vs. compilation flag, PMM checksum  PMM validity  Warrenty In formation State  SIM-Lock

Reflash phone

Check :

PWB.

Else defectiveD450 / D452

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CCS T echnical Documentation Troubleshooting Instructions

The phone does not register to the network, or the phone cannot make a call

If the phone does not register to the network, the fault can be in either BB or RF. Only few signals can be tested since several signals are 'buried' in one or more of the inner layers of the PWB.

First of all check that SIM LOCK is not causing the error by using a Test-SIM card and connect the phone to a tester.

Phone do not register to

or phone cannot make a call

network

C223, C224, C225, C226,

C227

Voltage = ~2,78VDC

All during GSM frame-

call mode.

Use TXP on C646 as trigger

Yes

C231

Voltage = ~1,35VDC

All during GSM frame (call mode)

Use TXP on C646 as trigger

Yes

J608, J609, J610

Check RF serial bus during

GSM-frame :

Logic HIGH = 1,8VDC

Logic LOW = 0VDC

RFBUSCLK (J608),

RFBUSDA (J609),

RFBUSEN1X(J610)

Yes

J600 - J603

Check analog signals during

GSM-frame (RX slot):

RXIP/RXIM (J600/J601)

0-1,45VDC

RXQP/RXQM (J602/J603)

0-1,45VDC

Yes

R610, R611

Check analog signals during

GSM-frame (TX slot):

TXIP/N (R610) = 1-1,75VDC

TXQP/N (R611) = 1-1,75VDC

Yes

C223, C224, C225, C226,

C227,PWB.

Else defectiveD200 or D400*

C231,PWB.

Else defective

D200* or D400*

Else defectiveD200*

R610, R611,PWB.

Else defectiveD200*

Check :

PWB.

or D400*

Check :

PWB.

or D400*

Check :

or D400*

Check RF

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SIM related faults

Insert SIM card fault

The hardware of the SIM interface from UEM (D200) to the SIM connector (X387) can be tested without a SIM card. When the power is switched on the phone first check for a 1,8V SIM card and then a 3V SIM card. The phone will try this four times, where after it will display”Insert SIM card”.

Displayshows:

"Insert SIM Card"

Yes

X387

Verify that phone checks for 1,8V-SIM,and then 3V-SIM

during power-up.

(See illustration below)

Yes

SIM Interface OK

Check :

X387, R386, PWB.

Else defective D200*

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CCS T echnical Documentation Troubleshooting Instructions

SIM-Card rejected

The error ”SIM card rejected” means that the ATR message received from SIM card is corrupted, e.g. data signal levels are wrong. The first data is always ATR and it is sent from card to phone.

Displayshows:

"SIM Card Rejected"

Yes

X387

VSIM = min. 1,6V(1,8V Card)

VSIM = min. 2,8V(3V Card)

(Seeillustration below)

Yes

X387

ATR data can be seen at

SIM data pin.

Yes

SIM Interface OK

Check :

R386, PWB.

Else defective D200*

Check :

X387, R386, PWB.

For reference a picture with normal SIM power-up is shown below.

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Audio related faults

Earpiece do not work

Replace :

Earpiece

Error still present

Z150, R161

Check Z150, R161 is

working correctly

(no short/open-circuit)

Yes

Defective D200*

Check :

PWB.

Else defective D200*

Microphone do not work and

there isn't any mechanical

problem

C103, Z100

Check C103, Z100 is

working correctly

(no short/open-circuit)

Replace :

System Connoctor

Error still present

R165

Check voltage level on

R165 towards UEM (bias)

=2,1V

Yes

R153

Check voltage level on

R153 towardsmic-lines (bias)

= 1,0V - 1,4V

Replace :

C103 and/or Z100

Check :

R165, C168, PWB.

Else defctive D200*

Check :

R153, R157,C151, C152,

C153, C154, PWB.

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Headset earpiece do not

work and there isn't any

mechanical problem

R183, Z102

Check R183, Z102 is

working correctly

(no open-circuit)

Defective D200*

Headset microphone do not

work and there isn't any

mechanical problem

R166

Check voltage level on R166

towards UEM (bias) = 2,1V

Yes

R151

Check voltage level on R151

towards UEM (bias)

= 1,0V - 1,4V

Yes

Replace :

C183 and/or Z102

Replace :

D200*

Check :

R166, R151, C171

R152, R156, R168, C155, C156, C172, C170, C173, C174,

Z101

CheckXMIClinetoUEM

(D200)

Error still present

Defective D200*

Replace :

Defective component

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Charging failure

Phone is OFF - battery is

completely empty

(<=3,1VDC)

and no current from

charger when connected

L100

VCHAR > 2,1VDC

Yes

Defective D200*

Phone is ON or OFF - battery

nominal voltage (~3,6VDC)

and no current from

charger when connected

L100

VCHAR > 3,6VDC

Yes

R200, System-connector.

F100, L100, V101, C100, R200, System-connector.

Check :

F100, L100, V101, C100,

Check :

Defective

D200 or D400*

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CCS T echnical Documentation Troubleshooting Instructions

Display info when

charger is connected :

"Not charging"

R206

Voltage on R206 towards

D200 is ~0,8VDC

when power is connected.

(BSI must be 75K)

Yes

Check :

X101, R202, R206, C240.

Voltage (use scope) on R207

D200 same as VBAT voltage

R207

towards D200 is ~0,9VDC at

peak.

(BSI must be 47K)

Yes

R200

Voltage on R200 towards

Yes

R200

Voltagerisesslowlyon

R200 towards D200 when

charger is connected.

Yes

Check :

PWB

X101, R202, R207, C220.

Else defective D200*v

Check :

R200, PWB.

Check :

PWB.

Else defective D200*

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RF Troubleshooting

Two types of measurements are used in the following. It will be specified if the measurement type is "RF" or "LF".

• RF measurements should be done with a Spectrum Analyser and a high-frequency 500 ohm passive probe, for example HP54006A. (Note that when measuring with the 500 ohm probe the signal will be around 20 dB attenuated. The values in the following will have these 20 dB subtracted and represent the real value seen on the spectrum analyser).

Note that the testjig have some losses which must be taken into consideration when calibrating the test system.

• LF (Low frequency) and DC measurements should be done with a 10:1 probe and an oscilloscope. The probe used in the following is 10MOhm/8pF passive probe. If using another probe then bear in mind that the voltages displayed may be slightly different.

Always make sure the measurement set-up is calibrated when measuring RF parameters on the antenna pad. Remember to include the loss in the module repair jig when realigning the phone.

Most RF semiconductors are static discharge sensitive. So ESD protection must be taken during repair (ground straps and ESD soldering irons). Mjoelner is moisture sensitive so parts must be pre-baked prior to soldering.

Apart from key-components described in this document there are a lot of discrete components (resistors, inductors and capacitors) for which troubleshooting is done by checking if soldering of the component is done properly and checking if the component is missing from PWB. Capacitors can be checked for short-circuiting and resistors for value by means of an ohmmeter, but be aware in-circuit measurements should be evaluated carefully.

In the following both the name EGSM and GSM900 will be used for the lower band and both PCN and GSM1800 will be used for the upper band.

General description of the RF circuits

In the following general descriptions different colours are used in the block diagram. The GSM 900 signal route is shown in red, the GSM1800 route in green and the common signal lines are shown in blue. Signal lines which is common for both

Receiver signal path

The signal from the antenna pad is routed to the RX/TX switch ( Z700). If no control voltage is present at VANT2 and VANT1 the switch works as a diplexer and the GSM900 signal is passed through the RX/TX switch to GSM-RX and the GSM1800 signal is passed to DCS-RX.

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Figure 1: Receiver signal path

RX/TX

Z700

Ant

Supply

filter

F X R D D V

LNA

SAW Z602

SAW Z601

RX900

RX1800

RX1900

VANTL / VANTM

GSM

TX RX

Switch

PCN

INPL INML

INPM INMM

INPH INMH

Bias

LNA

Controls

VDDDIG

Pregain

22 22

1/2 1/4

BBAMP

LPF1

B B X R D D V

DCN1

Mjoelner

N600

BIQUAD

AGC

LPF2

BIQUAD

AGC

LPF2

From the RX/TX switch the GSM900 signal is routed to the SAW filter (Z602). The purpose of the SAW filter is to provide out-of band blocking immunity and to provide the LNA in Mjoelner (N600) with a balanced signal. The front end of Mjoelner is divided into a LNA and Pre-Gain amplifier before the mixers.

DCN2

VRX

VR6

RXIP RXIM

RXQ

The output from the mixer is feed to Baseband part of Mjoelner where the signals amplified in the BBAMP and low pass filtered in LPF1 before the DC compensation circuits in DCN1. The DCN1 output is followed by a controlled attenuator and a second lowpass filter LPF2. The output from LPF2 is DC centered in DCN2 before being fed to the BB for demodulation.

The GSM1800 signal chain is similar to GSM900, the SAW filter numbered Z601.

Transmitter signal path

The I/Q signal from the BB is routed to the modulators for both 900 and 1800 MHz. The output of the modulators is either terminated in a SAW filter ( Z603 ) for GSM 900 or a balun for GSM1800. Both signals are amplified in buffers whereby a limiting effect takes place to suppress some of the AM contents of the signal. The amplitude limited signal is then amplified in the PA (N700) where the gain control takes place. In order to control the TX level a sample of the signal is taken in a directional coupler ( L709 for GSM900 and L704 for GSM1800) and used in the power loop amplifier in Mjoelner to establish the right output power. The TX signal from the couplers is fed to the RX/TX switch, used to select which signal to route to the antenna.

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Figure 2: Transmitter signal path

Ant

RX/TX

Z700

VANTL / VANTM

VANTH

Controls

VB_DET VTXLOL

VTXLOH

VTXBH

Balun

SAW

Z603

PWloop

filter

VTXBL

PLFB1 PLFB2

VPCH/VPCL

PCN

GSM

TX RX

Switch

PCN

L704

Dir.

Coupler

L709

DET

VBATTRF

N700

V701

Buffer

EGSM

V702

VTX

Controls

OUTHP OUTHM

OUTLP

OUTLM

DET

VDDDIG

VDDRXBB

PWC

TXC

TXP

VDDTX

Supply

filter

VTX

VR2

Mjoelner

N600

1/2

TXQM

TXQP/

1/4

TXIM

TXIP/

PLL

The PLL supplies Local Oscillator (LO) signals for the RX and TX-mixers. In order to be able to generate LO-frequencies for the required EGSM and PCN channels, a regular synthesiser-circuit is used. All blocks for the PLL except for the VCO, reference X-tal and loopfilter is located in the Mjoelner IC.

The reference frequency is generated by a 26MHz Voltage Controlled X-tal Oscillator (VCXO) which is located in the Mjoelner IC. Only the X-tal is external. 26MHz is supplied to BB where a divide-by-2 circuit (located in the UPP IC) generates the BB-clock at 13MHz. The reference frequency is supplied to the reference divider (RDIV) where the frequency is divided by 65. The output of RDIV (400kHz) is used as reference clock for the

Phase Detector (ϕ).

The PLL is a feedback control system controlling the phase and frequency of the LO-signal. Building blocks for the PLL are: Phase detector, Charge Pump, Voltage Controlled Oscillator (VCO), N-Divider and loopfilter. As mentioned earlier only the VCO and loopfilter is external to the Mjoelner IC.

The VCO (G600) is the component that actually generates the LO-frequency. Based on the control voltage input the VCO generates a single-ended RF output. The signal is then differentiated through a balun. This signal is fed to the Prescaler and N-divider in Mjoelner, these 2 block will together divide the frequency by a ratio based on the selected channel. The divider output is supplied to the phase detector which compares the frequency and phase to the 400kHz reference clock. Based on this comparison the phase

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detector controls the charge pump to either charge or discharge the capacitors in the loopfilter. By charging/discharging the loopfilter the control voltage to the VCO changes and the LO-frequency will change. Therefore the PLL will make the LO-frequency stay locked to the 26MHz VCXO frequency.

The loopfilter consists of the following components: C639-C641 and R618-R619.

The PLL is operating at twice the channel center frequency when transmitting or receiving in the PCN band. For the EGSM band the PLL is operating at 4-times the channel frequency. Therefore divide-by-2 and divide-by-4 circuits are inserted between the PLL output and LO-inputs to the PCN and EGSM mixers.

Table 1: Frequency plan

Frequency band Channel System Frequency Band (MHz) PLL Frequency band (MHz)

EGSM RX 975-1023

TX 880.2 – 914.8 3520.8 – 3659.2

1 - 124

925.2 - 959.8 3700.8 - 3839.2

PCN RX 512 – 885 1805.2 – 1879.8 3610.4 – 3759.6

TX 1710.2 – 1784.8 3420.4 – 3569.6

According to the table above the PLL must be able to cover the frequency range

3420.4MHz to 3839.2MHz.

Figure 3: Synthesiser

To PCN RX

ToGSM RX

mixer

ToP CN

Modulator

mixer

2 22

1/2 1/4

222

ToG SM

Modulator

Mjoelner

N600

VDDRXBB

ResistorExt/R2H/R2

VBEXT

Ref. filter

VREF1

RFCONV_0(9)

Main Bias

Circ uit

VDDLO VDDPLL VDDPRE

Buffer

VDDCP

CPOUT

VDDXO VDDBBB

REFOUT XTA LM XTALP

INPLO INMLO

VDDDIG

VDDDL SELADDR

RESETX

RF_E N

RF_CLK

RF_DA TA

RESETX

VCOSENSE

Cha rge Pump

Lock Detect

1/2

I/O level shift

64/ 65

RBEXT

LOCNT

REFCN T

2,7k

NDIV ADIV

VDDRXBB

SENSE

PA vendor

indication 18k : Hitachi

82k : RFMD

RDI V

VCXO Bias

R2H/R2

Sensor

BIST / Temp.

Rpa

Buf/ AGC

AFC/ CAL

Cont rol

VDDTX

Digital Control

26MHz

Synth supply

filter Vcp

supply

filter PLL

loop filter

VCXO supply

filte r

VCTRL

REFO UT (26MHz )

VCO (G600)

RESETX_Mjoel

VPLL

VXO

VVCO

VBB (1.8V)

Ref clk se t

RFBUSX RFBUSDA RFBUSCLK

RF Key component placement

VR1A

VR7

VR5

VR3

VR2 VIO

VIO GENIO6

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Troubleshooting Instructions CCS Technical Documentation

Figure 4: Key component location

Note! This is a copy of NHM-8. Use only for RF-part!

Table 2:

N600 Mjoelner RF IC

Z601 PCN RX SAW

Z602 EGSM RX SAW

Z603 EGSM TX SAW

B600 26 MHz crystal

G600 VCO ( 3.6 GHz UHF VCO )

N700 Power Amplifier (PA)

Z700 RX/TX switch

Power Supply Configuration

All power supplies for the RF Unit are generated in the UEM IC (D200). All power outputs from this IC has a decoupling capacitor at which the supply voltage can be checked.

The power supply configuration used in the HDb12 phone is shown in the blockdiagram below:

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CCS T echnical Documentation Troubleshooting Instructions

Figure 5: Power supply configuration

UEM

Battery

VR2

VR3

VR5

VR1A

VR6

MJOELNER

Vtx

VXO

VPLL

VCP

Vrx

Vbb

VddXO

Vddbbb

VddRXF

VddRXBB

VddTX Vdddig

VddPLL

VddLO VddPre

VddCP

VIO

Vref01

VR7

Vvco

Vref1

Vbext

module

Sel_addr

VddDL

VCO

The names in bold are signal names used on the RF schematic pages. Names in the boxes within the Mjoelner and the VCO refers to pin names on the respective ICs (N600, G600).

Table 3:

Supply name RF Supply name UEM Min Typ Max Unit

VTX VR2 2.64 2.78 2.86 V

VXO VR3 2.64 2.78 2.86 V

VCP VR1A 4.75 V

VPLL VR5 2.64 2.78 2.86 V

VRX VR6 2.64 2.78 2.86 V

VVCO VR7 2.64 2.78 2.86 V

VBB VIO 1.72 1.8 1.88 V

VREF2 VrefRF01 1.334 1.35 1.366 V

VBATT BATTERY 3.1 3.6 5.2 V

Please see the picture below for measuring points at the UEM (D200).

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VR2=Vtx (C643)

VR7=Vvco (C

)

VR5=Vpll (C226)

VR3=Vvcxo (C227)

VR6=Vrx (C225)

Vref01=Vref2 (C231

Troubleshooting Instructions CCS Technical Documentation

Figure 6: Supply points at UEM (D200)

224

Receiver

Figure 7: Supply point at Mjoelner (N600)

Vio = Vbb (C621)

General Instructions for GSM900 RX Troubleshooting

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Connect the phone to a PC with the module repair jig.

Start Phoenix and establish connection to the phone

Select File. Select Scan for Product Ctrl-R

Select Maintenance, Testing and then RF Controls

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CCS T echnical Documentation Troubleshooting Instructions

Select:

Band: GSM900

Active Unit: RX

Operation Mode: Continuous

Rx/Tx Channel: 37

AGC: 9

The setup should now look like this:

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Troubleshooting Instructions CCS Technical Documentation

Fault Finding Chart for GSM900 Receiver

Figure 8: EGSM Receiver fault finding chart

Apply -55 dBm

942.4 MHz, offset

67.71 kHz

from generator to

antenna connector

YES

Oscilloscope at RX

I/Q signal 588 mVpp DC offset 1.35 V

freq.67.71 kHz

YES

EGSM chain

functional

switchat RX 900

Spectrumanalyzer

EGSM SAW filter

output -65 dBm

Check RX/TX

Z700

-56 dBm

YES

Z602

check Vc1 and V c2

at Z700 signal 0V

Check RX/TX

Check SAW filter

Oscilloscop

YES

switch

Z602

Check Mjoelner

YES

Spectrumanalyzer

Check signal after

inductorsL603 and

L602

-65 dBm

Check inductors

L603, L602

YES

Oscilloscope

VRX 2.7 V

check Mjoelner

serial interface

Check Base band

By measuring with an oscilloscope at RXIP or RXQP on a working GSM 900 receiver this picture should be seen.

Signal amplitude peak-peak 588 mV

DC offset 1.33 V

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CCS T echnical Documentation Troubleshooting Instructions

Figure 9: RX900 I/Q signal waveform

General Instructions for GSM1800 RX Troubleshooting

Connect the phone to a PC with the module repair jig.

Start Phoenix and establish connection to the phone

Select File. Select Scan for Product Ctrl-R

Select Maintenance, Testing and RF Controls

Select:

Band: GSM1800

Active Unit: RX

Operation Mode: Continuous

Rx/Tx Channel: 700

AGC: 9

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Troubleshooting Instructions CCS Technical Documentation

The setup should now look like this:

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CCS T echnical Documentation Troubleshooting Instructions

Fault Finding Chart for GSM1800 Receiver

Figure 10: GSM1800 receiver fault finding chart

Apply -55 dBm

1842.8 MHz, offset

67.71 kHz

from generator to

antenna connector

YES

Oscilloscope at RX

I/Q signal 408 mVpp DC offset 1.33 V

freq. 67.71 kHz

YES

PCN chain

functional

switch at RX 1800

Spectrum analyzer

PCN SAW filter output -65 dBm

Check RX/TX

Z700

-57 dBm

YES

Z601

Oscilloscop

check Vc1 and Vc2

at Z700 signal 0V

Check RX/TX

Check SAW filter

YES

switch

Z601

Check Mjoelner

YES

Spectrum analyzer

Check signal after

inductors L611 and

L601

-65 dBm

Check inductors

L611, L601

YES

Oscilloscope

VRX 2.7 V

check Mjoelner

serial interface

Check Base band

By measuring with an oscilloscope at RXIP or RXQP on a working GSM 900 receiver this picture should be seen.

Signal amplitude peak-peak 588 mV

DC offset 1.33 V

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Troubleshooting Instructions CCS Technical Documentation

Figure 11: RX1800 I/Q signal waveform

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Z700

Z601

Z602

Z601

Z602

L602

L601

L603

L611

CCS T echnical Documentation Troubleshooting Instructions

Measurement points in the receiver

Figure 12: RX measurements point at the RX/TX Switch - Z700

Vc1

Vc2

Z700

RX900 output

Z700

RX1800 output

RX900

Mjoelner input INML

RX900

SAW filter bal output

RX900

SAW filter unbal input

Z700

Figure 13: Measurements points at the RX-Filters – Z601/Z602

RX900

Mjoelner input INPL

RX1800

Mjoelner input INMM

Mjoelner input INPM

SAW filter unbal input

RX900

RX1800

SAW filter bal output

RX1800

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D200

Troubleshooting Instructions CCS Technical Documentation

Figure 14: RX I/Q Signals, Baseband shielding can UEM (D200)

RXQM

D200

RXIM

RXIP D200

RXQP

D200

Transmitter

Measurement points for the transmitter

Figure 15: TX measuremnet points in the PA ( N700 ) shielding can

Vcon1_GSMVcon2_DCS

ANT

DCS-Tx

DET_Out

GSM-Tx (C717)

Pout_DCS

Pin_DCS

VPCTRL_P

VTX_B_P

VPCTRL_G

Pout_GSM (C717)

Pin_GSM

VTX_B_G

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OUT_D_TX

VTX

TXIP

TXIM

GSM

TXQI

CCS T echnical Documentation Troubleshooting Instructions

Figure 16 : TX measurement point in Mjolner (N600) shielding can

Bal_Input1

Bal_Input2

GSM

Bal_Input2

OUT_G_TX

General instructions for GSM TX troubleshooting

Apply a RF-cable to the RF-connector to allow the transmitted signal act as normal. RFcable should be connected to measurement equipment or to at least a 10-dB attenuator, otherwise the PA may be damaged.

Start Phoenix-Service-Software and establish a connection to the phone e.g. FBUS.

Select File and Product: Gemini

Select: Maintenance, Testing and RF Controls

Band: GSM 900 Active Unit: TX Tx Power Level: 5 Tx Data Type: Random

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Troubleshooting Instructions CCS Technical Documentation

Your screen should look like:

Measure the output power of the phone; it should be around 32.5 dBm. Remember the loss in the jig; around 0.3 dB.

Fault finding chart for GSM900 transmitter

Fault finding in output power

For the spectrum analyser measurements in the following chart use the 500 ohm passive probe. Since the signal measured is bursted it is advised to set the analyser to maxhold.

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CCS T echnical Documentation Troubleshooting Instructions

Figure 16: EGSM900 transmitter fault finding chart

VTX= 2.7 V +

Yes

discretes around

With Scope check :

TXQP

( See figure 19 )

Check TXIP and

Yes

Check Baseband

seriel bus

Checl Mjolner + the

to Z603

-20 dBm

Measure BAL input

input

Measure

OUT_G_TX Buffer

-12 dBm

Measure Pin_GSM

13 dBm

Measure

Pout_GSM

Yes

-25 dBm

Yes

Check Z603

(TXSAWfilter)

Yes

VTX_B_G = 2.7 V

With Scope check :

VPCTRL_G

( See figure 18 )

With Scope check :

(Coupler)

Check L709

Yes

Check V702

discretes around

(PA)

Check N700

TXC

( See figure 18 )

With Scope check :

Yes

Check V700

( detector )

discretes around

on GSM-TX.

Power ~ 8 dBm

Measure TX Power

Yes

TX/RX Swith:

Vcon2_DCS = 0V

With Scope check on

Yes

Vcon1_GSM = 2.7 V

Check Z700

(RX/TXSwitch)

No No No No No No

> 30.5 dBm

MeterorRCT

Yes

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Troubleshooting Instructions CCS Technical Documentation

Figure 17: VPCTRL_G & TXC

Yellow trace: Vpctrl_G @ power level 5, ch37 Pink trace: TXC GSM900 band

Fault finding in modulation

The following plots show different situations of TX IQ measurements. Depending on the time the modulation may cause the signal to look differently.

TX I/Q waveforms

Pink trace: TXQP Blue trace: TXIP - All 1 Pink trace: TXQP Blu etrace: TXIP - Random

Pink trace: TXQP Blue trace: TXIP - All 1 (Zoom In)

Pink trace: TXQP Blu etrace: TXIP - Random ( Z

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CCS T echnical Documentation Troubleshooting Instructions

I/Q signals look almost the same regardless if modulation is by "1" or by "0". There is no significante difference between TXIP and TXIM. The same is valid for TXQP and TXQM.

PCN TransmitterGeneral instructions for PCN TX troubleshooting

Start Phoenix-Service-Software and establish a connection to the phone e.g. FBUS.

Select File. Choose Product: Gemini

Select: Maintenance, Testing and then RF Controls.

Band: GSM 1800 Active Unit: TX Tx Power Level: 0 Tx Data Type: Random

Your screen should look like:

Measure the output power of the phone; it should be around 28.5 dBm. Remember the loss in the jig; around 0.7 dB.

Path of the transmitted PCN signal

Fault finding chart for PCN transmitter

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Troubleshooting Instructions CCS Technical Documentation

Figure 18: GSM1800 transmitter fault finding chart

VTX= 2.7 V +

Yes

discretesaround

With Scope check :

to T600

-16 dBm

Measure BAL input

-19 dBm

Buffer input

Measure OUT_D_TX

-14 dBm

Measure Pin_DCS

11 dBm

Measure

Pout_DCS

Yes

Check TXIP and

With Scope check :

TXQP

Check T600

With Scope check :

VPCTRL_P

Check L709

( See figure 19 )

( PCN Balun)

VTX_B_P = 2.7 V

( See figure 21 )

( Coupler )

Yes

Check Baseband

Yes

Check V701

discretes around

(PA)

Check N700

TXC

( See figure 21 )

With Scope check :

Yes

seriel bus

Checl Mjolner + the

(detector)

Check V700

discretesaround

on DCS-TX.

Power ~ 9 dBm

Measure TX Power

Yes

TX/RX Swith:

Vcon2_DCS= 2.7 V

With Scope check on

Yes

Vcon1_GSM = 2.7 V

Check Z700

(RX/TXSwitch)

No No No No No No

> 27.5 dBm

MeterorRCT

ANT with Power

Measure Power on

Yes

Check C739, L702

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CCS T echnical Documentation Troubleshooting Instructions

Figure 19: VPCTRL_P & TXC

Yellow trace : Vpctrl_P @ power level 0, ch700 Pink trace : TXC PCN1800 band

** TXIQ signals look the same in PCN and GSM

Synthesizer

There is only one PLL synthesizer generating Local Oscillator frequencies for both RX and TX in both bands ( PCN and EGSM). The VCO frequency is divided by 2 for PCN operation or by 4 for EGSM operation inside the Mjoelner IC.

General instructions for Synthesizer troubleshooting

Start the Phoenix-Service-Software and

Select: Product: NHM-8NX

Select: Maintenance, Testing and then RF Controls.

Band GSM1800 Active Unit RX Operation Mode Continuous RX/TX Channel 700

It is not possible to measure the output of the VCO (G600) directly as this component is placed underneath a shielding can without detachable lid. However with spectrum analyzer and 500 ohm passive probe it is possible to get an indication if the VCO outputs the correct frequency. To do this probe R656 – the frequency should be 3685.6MHz and the power should be around –50 dBm.

26 MHz Reference Oscillator ( VCXO )

The 26 MHz oscillator is located in the Mjoelner IC (N600). The coarse frequency for this oscillator is set by an external crystal (B600). The reference oscillator is used as a reference frequency for the PLL synthesizer and as the system clock for BaseBand. The

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Troubleshooting Instructions CCS Technical Documentation

26MHz signal is divided by 2 to achieve 13MHz inside the UPP IC (D400). The 26 MHz signal from the VCXO can be measured by probing R425 (must be measured on the UPP side of R425 i.e. the end not connected to C425). The level at this point is approx. 700mVpp. Frequency of this oscillator is adjusted by changing the AFC-register inside the Mjoelner IC. This is done via the Mjoelner serial interface.

Example Signal Measured at VCXO output (R425)

Figure 20: VCXO 26 MHz waveform

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CCS T echnical Documentation Troubleshooting Instructions

VCO

The VCO is generating frequencies in the range of 3420.2MHz – 3839.2 MHz when the PLL is running. The output frequency from the VCO is led to the Local oscillator input of the Mjoelner IC (N600), where the frequency is divided by 2 or 4 so that they can generate all channels in EGSM and PCN respectively. Frequency of the VCO is controlled by a DC-voltage ( Vctrl ) coming from the loopfilter. The loopfilter consists of the components R618, R619 and C639-C641. Range of the Vctrl when the PLL is running (locked) is 0.7V – 3.8V. Even if the PLL is not in locked state (Vctrl out of range) there is some frequency at the output of the VCO (G600) which is between 3 and 4 GHz. This is of course only true if the VCO is working and if the VCO power supply is present (2.7V).

Fault finding chart for PLL Synthesizer

Figure 21: PLL fault finding chart

From Phoenix chose:

File

> Choose Product > NHM-8NX

Mainenance

GSM1800 > RX > Continuous > Ch 700

> Testing > RF Controls >

Spectrum Analyzer:

Measure

VCO frequency at R656

3685.6MHz

Yes

PLL block functional

Oscilloscope:

Measure

VCXO Power Supply at C620

2.7 V

Yes

Oscilloscope:

Measure

VCXO output

On (R425) 26 MHz,

Approx. 700mVpp

Yes

Oscilloscope:

Measure

VCO Power Supply

(R656)

2,7 V

Yes

Oscilloscope:

Measure

PLL Power Supply

C614 & C634

Both 2,7 V

Yes

Oscilloscope:

Measure

Supply C616

4,7 V

Yes

Spectrum Analyzer:

Measure

VCO output (R656)

Some signal between

3and4GHz

Yes

Oscilloscope:

Measure

Control Voltage C641

between 0.5 and 4.0 V

Yes

Check

Mjoelner N600,

UPP D400, RFBusClk J608, RFBusDA J610,

RFBusX j609

& Reset_Mjoel

UEM, Software??

Phone not in function

VCXO is not functional

Phone not in function

UEM, Software??

Phone not in function

UEM, Software??

Phone not in function

R603, UEM, Software??

VCO G600 is not functional

Loopfilter R618,R619,

Check

Crystal B600

Check

C639-C641

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VCXO Vcc (C620)

Troubleshooting Instructions CCS Technical Documentation

If the phone stops working a short time after the power is turned ON, a possible reason forthis might be that the 26MHz system clock signal is not getting to the UPP clockinput in BaseBand. In this case check the following:

1 Turn on the phone and check

2 VCXO Power supply (C620) = 2.7V

3 VCXO output (R425 – end not connected to C425) is 26MHz and approx.

700mVpp

If this is not the case check the reference crystal (B600) and Mjolner (N600) as well as R425, R426, C425, C426.

Measurement points for the PLL

Measurement points at the VCXO

Figure 22: Measurement point for VCXO supply

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VCXO Output (R425)

VCO Vcc (R656)

VCO Output is also

CCS T echnical Documentation Troubleshooting Instructions

Figure 23: Measurement point for VCXO output

Measure at this end!

Measurement points at the PLL/VCO

Figure 24: Measurement point for PLL

detected here!

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Vcp=VR1A

Troubleshooting Instructions CCS Technical Documentation

CPVcp(C 616)

PLL Vcc (C614, C634)

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902.4

947.4

3609.6

3789.6

124

914.8

959.8

3659.2

3839.2

Frequency list NHM-5 GSM900

CCS T echnical Documentation Troubleshooting Instructions

Frequency lists

GSM900

CH TX RX VCO TX VCO RX CH TX RX VCO TX VCO RX CH TX RX VCO TX VCO RX

975 880.2 925.2 3520.8 3700.8 1 890.2 935.2 3560.8 3740.8 63 902.6 947.6 3610.4 3790.4 976 880.4 925.4 3521.6 3701.6 2 890.4 935.4 3561.6 3741.6 64 902.8 947.8 3611.2 3791.2 977 880.6 925.6 3522.4 3702.4 3 890.6 935.6 3562.4 3742.4 65 903 948 3612 3792 978 880.8 925.8 3523.2 3703.2 4 890.8 935.8 3563.2 3743.2 66 903.2 948.2 3612.8 3792.8 979 881 926 3524 3704 5 891 936 3564 3744 67 903.4 948.4 3613.6 3793.6 980 881.2 926.2 3524.8 3704.8 6 891.2 936.2 3564.8 3744.8 68 903.6 948.6 3614.4 3794.4 981 881.4 926.4 3525.6 3705.6 7 891.4 936.4 3565.6 3745.6 69 903.8 948.8 3615.2 3795.2 982 881.6 926.6 3526.4 3706.4 8 891.6 936.6 3566.4 3746.4 70 904 949 3616 3796 983 881.8 926.8 3527.2 3707.2 9 891.8 936.8 3567.2 3747.2 71 904.2 949.2 3616.8 3796.8 984 882 927 3528 3708 10 892 937 3568 3748 72 904.4 949.4 3617.6 3797.6 985 882.2 927.2 3528.8 3708.8 11 892.2 937.2 3568.8 3748.8 73 904.6 949.6 3618.4 3798.4 986 882.4 927.4 3529.6 3709.6 12 892.4 937.4 3569.6 3749.6 74 904.8 949.8 3619.2 3799.2 987 882.6 927.6 3530.4 3710.4 13 892.6 937.6 3570.4 3750.4 75 905 950 3620 3800 988 882.8 927.8 3531.2 3711.2 14 892.8 937.8 3571.2 3751.2 76 905.2 950.2 3620.8 3800.8 989 883 928 3532 3712 15 893 938 3572 3752 77 905.4 950.4 3621.6 3801.6 990 883.2 928.2 3532.8 3712.8 16 893.2 938.2 3572.8 3752.8 78 905.6 950.6 3622.4 3802.4 991 883.4 928.4 3533.6 3713.6 17 893.4 938.4 3573.6 3753.6 79 905.8 950.8 3623.2 3803.2 992 883.6 928.6 3534.4 3714.4 18 893.6 938.6 3574.4 3754.4 80 906 951 3624 3804 993 883.8 928.8 3535.2 3715.2 19 893.8 938.8 3575.2 3755.2 81 906.2 951.2 3624.8 3804.8 994 884 929 3536 3716 20 894 939 3576 3756 82 906.4 951.4 3625.6 3805.6 995 884.2 929.2 3536.8 3716.8 21 894.2 939.2 3576.8 3756.8 83 906.6 951.6 3626.4 3806.4 996 884.4 929.4 3537.6 3717.6 22 894.4 939.4 3577.6 3757.6 84 906.8 951.8 3627.2 3807.2 997 884.6 929.6 3538.4 3718.4 23 894.6 939.6 3578.4 3758.4 85 907 952 3628 3808 998 884.8 929.8 3539.2 3719.2 24 894.8 939.8 3579.2 3759.2 86 907.2 952.2 3628.8 3808.8

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0 890 935 3560 3740 50 900 945 3600 3780 112 912.4 957.4 3649.6 3829.6

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Issue 1 11/02 ãNokia Corporation Page 45

Page 46

RH-9

Troubleshooting Instructions CCS Technical Documentation

PCN

CH TX RX VCOTX VCO R X CH TX RX VCO TX VCO RX CH TX RX VCOTX VCO RX CH TX RX VCO TX VCO RX

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1813.4 3436.8 3626.8 647 1737.2 1832.2 3474.4 3664.4 741 1756 1851 3512 3702 835 1774.8 1869.8 3549.6 3739.6 554 1718.6 1813.6 3437.2 3627.2 648 1737.4 1832.4 3474.8 3664.8 742 1756.2 1851.2 3512.4 3702.4 836 1775 1870 3550 3740 555 1718.8 1813.8 3437.6 3627.6 649 1737.6 1832.6 3475.2 3665.2 743 1756.4 1851.4 3512.8 3702.8 837 1775.2 1870.2 3550.4 3740.4 556 1719 1814 3438 3628 650 1737.8 1832.8 3475.6 3665.6 744 1756.6 1851.6 3513.2 3703.2 838 1775.4 1870.4 3550.8 3740.8 557 1719.2 1814.2 3438.4 3628.4 651 1738 1833 3476 3666 745 1756.8 1851.8 3513.6 3703.6 839 1775.6 1870.6 3551.2 3741.2 558 1719.4 1814.4 3438.8 3628.8 652 1738.2 1833.2 3476.4 3666.4 746 1757 1852 3514 3704 840 1775.8 1870.8 3551.6 3741.6 559 1719.6 1814.6 3439.2 3629.2 653 1738.4 1833.4 3476.8 3666.8 747 1757.2 1852.2 3514.4 3704.4 841 1776 1871 3552 3742 560 1719.8 1814.8 3439.6 3629.6 654 1738.6 1833.6 3477.2 3667.2 748 1757.4 1852.4 3514.8 3704.8 842 1776.2 1871.2 3552.4 3742.4 561 1720 1815 3440 3630 655 1738.8 1833.8 3477.6 3667.6 749 1757.6 1852.6 3515.2 3705.2 843 1776.4 1871.4 3552.8 3742.8 562 1720.2 1815.2 3440.4 3630.4 656 1739 1834 3478 3668 750 1757.8 1852.8 3515.6 3705.6 844 1776.6 1871.6 3553.2 3743.2 563 1720.4 1815.4 3440.8 3630.8 657 1739.2 1834.2 3478.4 3668.4 751 1758 1853 3516 3706 845 1776.8 1871.8 3553.6 3743.6 564 1720.6 1815.6 3441.2 3631.2 658 1739.4 1834.4 3478.8 3668.8 752 1758.2 1853.2 3516.4 3706.4 846 1777 1872 3554 3744 565 1720.8 1815.8 3441.6 3631.6 659 1739.6 1834.6 3479.2 3669.2 753 1758.4 1853.4 3516.8 3706.8 847 1777.2 1872.2 3554.4 3744.4 566 1721 1816 3442 3632 660 1739.8 1834.8 3479.6 3669.6 754 1758.6 1853.6 3517.2 3707.2 848 1777.4 1872.4 3554.8 3744.8 567 1721.2 1816.2 3442.4 3632.4 661 1740 1835 3480 3670 755 1758.8 1853.8 3517.6 3707.6 849 1777.6 1872.6 3555.2 3745.2 568 1721.4 1816.4 3442.8 3632.8 662 1740.2 1835.2 3480.4 3670.4 756 1759 1854 3518 3708 850 1777.8 1872.8 3555.6 3745.6 569 1721.6 1816.6 3443.2 3633.2 663 1740.4 1835.4 3480.8 3670.8 757 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1779.6 1874.6 3559.2 3749.2 578 1723.4 1818.4 3446.8 3636.8 672 1742.2 1837.2 3484.4 3674.4 766 1761 1856 3522 3712 860 1779.8 1874.8 3559.6 3749.6 579 1723.6 1818.6 3447.2 3637.2 673 1742.4 1837.4 3484.8 3674.8 767 1761.2 1856.2 3522.4 3712.4 861 1780 1875 3560 3750 580 1723.8 1818.8 3447.6 3637.6 674 1742.6 1837.6 3485.2 3675.2 768 1761.4 1856.4 3522.8 3712.8 862 1780.2 1875.2 3560.4 3750.4 581 1724 1819 3448 3638 675 1742.8 1837.8 3485.6 3675.6 769 1761.6 1856.6 3523.2 3713.2 863 1780.4 1875.4 3560.8 3750.8 582 1724.2 1819.2 3448.4 3638.4 676 1743 1838 3486 3676 770 1761.8 1856.8 3523.6 3713.6 864 1780.6 1875.6 3561.2 3751.2 583 1724.4 1819.4 3448.8 3638.8 677 1743.2 1838.2 3486.4 3676.4 771 1762 1857 3524 3714 865 1780.8 1875.8 3561.6 3751.6 584 1724.6 1819.6 3449.2 3639.2 678 1743.4 1838.4 3486.8 3676.8 772 1762.2 1857.2 3524.4 3714.4 866 1781 1876 3562 3752 585 1724.8 1819.8 3449.6 3639.6 679 1743.6 1838.6 3487.2 3677.2 773 1762.4 1857.4 3524.8 3714.8 867 1781.2 1876.2 3562.4 3752.4 586 1725 1820 3450 3640 680 1743.8 1838.8 3487.6 3677.6 774 1762.6 1857.6 3525.2 3715.2 868 1781.4 1876.4 3562.8 3752.8 587 1725.2 1820.2 3450.4 3640.4 681 1744 1839 3488 3678 775 1762.8 1857.8 3525.6 3715.6 869 1781.6 1876.6 3563.2 3753.2 588 1725.4 1820.4 3450.8 3640.8 682 1744.2 1839.2 3488.4 3678.4 776 1763 1858 3526 3716 870 1781.8 1876.8 3563.6 3753.6 589 1725.6 1820.6 3451.2 3641.2 683 1744.4 1839.4 3488.8 3678.8 777 1763.2 1858.2 3526.4 3716.4 871 1782 1877 3564 3754 590 1725.8 1820.8 3451.6 3641.6 684 1744.6 1839.6 3489.2 3679.2 778 1763.4 1858.4 3526.8 3716.8 872 1782.2 1877.2 3564.4 3754.4 591 1726 1821 3452 3642 685 1744.8 1839.8 3489.6 3679.6 779 1763.6 1858.6 3527.2 3717.2 873 1782.4 1877.4 3564.8 3754.8 592 1726.2 1821.2 3452.4 3642.4 686 1745 1840 3490 3680 780 1763.8 1858.8 3527.6 3717.6 874 1782.6 1877.6 3565.2 3755.2 593 1726.4 1821.4 3452.8 3642.8 687 1745.2 1840.2 3490.4 3680.4 781 1764 1859 3528 3718 875 1782.8 1877.8 3565.6 3755.6 594 1726.6 1821.6 3453.2 3643.2 688 1745.4 1840.4 3490.8 3680.8 782 1764.2 1859.2 3528.4 3718.4 876 1783 1878 3566 3756 595 1726.8 1821.8 3453.6 3643.6 689 1745.6 1840.6 3491.2 3681.2 783 1764.4 1859.4 3528.8 3718.8 877 1783.2 1878.2 3566.4 3756.4 596 1727 1822 3454 3644 690 1745.8 1840.8 3491.6 3681.6 784 1764.6 1859.6 3529.2 3719.2 878 1783.4 1878.4 3566.8 3756.8 597 1727.2 1822.2 3454.4 3644.4 691 1746 1841 3492 3682 785 1764.8 1859.8 3529.6 3719.6 879 1783.6 1878.6 3567.2 3757.2 598 1727.4 1822.4 3454.8 3644.8 692 1746.2 1841.2 3492.4 3682.4 786 1765 1860 3530 3720 880 1783.8 1878.8 3567.6 3757.6 599 1727.6 1822.6 3455.2 3645.2 693 1746.4 1841.4 3492.8 3682.8 787 1765.2 1860.2 3530.4 3720.4 881 1784 1879 3568 3758 600 1727.8 1822.8 3455.6 3645.6 694 1746.6 1841.6 3493.2 3683.2 788 1765.4 1860.4 3530.8 3720.8 882 1784.2 1879.2 3568.4 3758.4 601 1728 1823 3456 3646 695 1746.8 1841.8 3493.6 3683.6 789 1765.6 1860.6 3531.2 3721.2 883 1784.4 1879.4 3568.8 3758.8 602 1728.2 1823.2 3456.4 3646.4 696 1747 1842 3494 3684 790 1765.8 1860.8 3531.6 3721.6 884 1784.6 1879.6 3569.2 3759.2 603 1728.4 1823.4 3456.8 3646.8 697 1747.2 1842.2 3494.4 3684.4 791 1766 1861 3532 3722 885 1784.8 1879.8 3569.6 3759.6 604 1728.6 1823.6 3457.2 3647.2 698 1747.4 1842.4 3494.8 3684.8 792 1766.2 1861.2 3532.4 3722.4 605 1728.8 1823.8 3457.6 3647.6 699 1747.6 1842.6 3495.2 3685.2 793 1766.4 1861.4 3532.8 3722.8

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CCS T echnical Documentation Troubleshooting Instructions

Alignment

NHM-8NX manual align with Phoenix

In Phoenix select connection Fbus and Product Gemini. If you power up the board before selecting Fbus, it works without any error messages. Use Jig or other device for RF and bus connection. Attenuation in the probe alone is 0.5dB for 900 and 1dB for 1800. Use CMD55 or other suitable device. Default channels are 37 for GSM900 and 700 for GSM1800. The alignments and calibrations must be performed in the order shown to give reliable results.

The way to save data to the phone and to load data from the phone is made different in the various tunings. Always look what is shown in the windows regarding these issues and act accordingly.

To vary a selected parameter you can use + and – key or in some cases directly type the new value. + and – steps the value for every press. Repeat function seems not to work. In I/Q you can use the side arrows.

RX calibration

Select Maintenance, Tuning, RX Calibration

Select Band: GSM 900

The result should be like the shown:

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1 Select Automatic, set to 60dBm in small window in top bar

2 Start and select PM settings in the start parameters that pops up

3OK

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1 The existing data in the phone is shown

2 Calibrate, and the new data is shown

3 Stop, and the little window pops up where you can select to save or not

4 Select GSM1800 in the top bar and repeat at channel 700

1 The existing data in the phone is shown

2 Calibrate, and the new data is shown

3 Stop, and the little window pops up where you can select to save or not

RX channel select filter

1 Select Maintenance, Tuning, Rx Channel Select Filter Calibration

2 Press Start and you can select to load values from the phone or not

3 Press AutoTune

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4 Press Stop and you can select to save values to the phone or not

Note: This calibration requires no input signal

RX Band Filter Response

1 Select Maintenance, Tuning, Rx Band Filter Response Compensation

2 Press Start, Read from PM area and you can select to load values from the phone

or not

3 Press Manual Tuning

4 Set the Signal generator according to the pop-up windows

5 When finished press Stop, Write to PM area and you can select to save values to

the phone or not

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6 Repeat for GSM1800

Note: This calibration requires a lot of different frequencies from the generator. If

you have a signal generator with a frequency list option you can with advantage use Auto Tuning (Dwell should be around 10ms).

Tx Power tuning

Select Maintenance, Tuning, Tx Power Level Tuning

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TX power tuning GSM

1 Select edge off, GSM 900

2 Press Start and select from where to load values. Best is to have PC saved data

from a good phone. The data from a "good" phone can be saved to PC, for use

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later.

1 Select the modulation 1, 0 or random in Tx Data Type. Select random if a GSM

tester is used. Then it can synchronise to the burst.

2 Select Tx PA Mode High

3 Tune the highlighted values to the wanted power (Use average burst power)

4 Tune base level to –28dBm (Close to lowest level CMD55 can keep synchronisa-

tion)

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5 Calculate coefficients

1 Select Tx PA Mode low and tune the high lighted values.

2 The base level coefficient is taken from the high mode. Do not change it.

3 Calculate and select Stop

If you are satisfied with the coefficients and the power, then save to the Permanent memory.

You can also save the table to the PC, so that you can load it to an other phone. Or you can select not to do anything by removing both ticks.

Only way to end the tuning session is with Yes

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TX power tuning PCN

1 GSM 1800 band (PCN)

2Start

3 Select where to get values from. Normally Permanent Memory

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4OK

1 Select the wanted modulation. Random if a GSM tester is used, so that you can

synchronise the burst.

2 Only high mode is possible

3 Tune the highlighted values to the wanted power

4 Tune base level to –27dBm

5Stop

6 Select where to save the values, one, both or no one can be selected.

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7 Yes. That’s the only way to end tuning.

I/Q tuning

Select Maintenance, Tuning, Tx IQ tuning

Set CMD55 to Narrow Spectrum on the same band as the phone. Selected in the top menu.

1 Select where to get values. Normally select Load From Product

2Start

3 Tune offset values to lowest carrier. Use Side arrows or +, - .

4 Tune Amplitude and phase to lowest sideband.

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5 Check eventually with other modulation (0).

Remember to tick Save to Product if you want to save to phone.

1 Stop to end the tuning with the selected save option

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RF control

This menu can be placed in maintenance or in tuning dependent of Phoenix.

It is meant to check the receiver or transmitter without going in call. It works very much like a call, but you have control via the PC, and not via the tester. The TX mode GSM900 can select between Free, High and low mode. It changes the PA mode, but changes also the power level if a level is selected that is not supported in that mode.

If you want to tune at other channels than the default, then you must select it first in RF control and then start the tuning.

1 Same procedure for PCN as for GSM.

2 Remember to tick Save To Product.

3 Stop. Ends tuning and does what you have ticked.

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Call testing

If all tunings are done, and the phone TX and RX is working a call is the ultimate test of the phone.

Set CMD55, or similar tester, to manual test and switch the phone to normal if it was in local. Remember to have a test simcard in the phone.

When the phone has made a registration a call can be made, and it is possible to let the phone answer via Phoenix. In the Autocaller (Maintenance Testing) you can answer by ticking Answer when button pushed and then posh the button.

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Nokia 3510i Service Manual 9 rh 9 trouble

Specifications and Main Features

Frequently Asked Questions

User Manual

Troubleshooting Instructions

Table of Contents

List of Figures

Introduction

Baseband Testpoints

Fault Finding Charts

Phone is dead

Flash programming does not work

Power does not stay on or phone is jammed

Display information: "Contact Service"

The phone does not register to the network, or the phone cannot make a call

SIM related faults

Insert SIM card fault

SIM-Card rejected

Audio related faults

Charging failure

RF Troubleshooting

General description of the RF circuits

Receiver

General Instructions for GSM900 RX Troubleshooting

Fault Finding Chart for GSM900 Receiver

General Instructions for GSM1800 RX Troubleshooting

Fault Finding Chart for GSM1800 Receiver

Measurement points in the receiver

Transmitter

Measurement points for the transmitter

General instructions for GSM TX troubleshooting

Fault finding chart for GSM900 transmitter

PCN TransmitterGeneral instructions for PCN TX troubleshooting

Synthesizer

General instructions for Synthesizer troubleshooting

26 MHz Reference Oscillator ( VCXO )

Fault finding chart for PLL Synthesizer

Measurement points for the PLL

Frequency lists

Alignment

NHM-8NX manual align with Phoenix

RX calibration

RX channel select filter

RX Band Filter Response

Tx Power tuning

TX power tuning GSM

TX power tuning PCN

I/Q tuning

RF control

Call testing