Nokia 2650 Service Manual 07 RH53_54 troubleshoot

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Nokia Customer Care

RH-53/54

7-T roubleshooting

Instructions

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RH-53/54

Nokia Customer Care 7-Troubleshooting Instructions

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2 COMPANY CONFIDENTIAL ISSUE 1 09/2004

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Table Of Contents Page No

Baseband Troubleshooting................................................................................ 7

Baseband test points ......................................................................................... 7

Troubleshooting diagrams ................................................................................. 8

Phone is dead.................................................................................................... 9

Flash programming does not work................................................................... 10

Power does not stay on or phone is jammed................................................... 11

Display information : "Contact Service"............................................................ 12

The phone does not register to the network, or the phone cannot make a call 13

Charging troubleshooting................................................................................. 14

Audio troubleshooting 1, 2............................................................................... 16

Audio troubleshooting 3: Headset does not work ............................................ 17

Upper block failures.......................................................................................... 18

Introduction to RH-53/54 RF Troubleshooting ...............................................23

General description of the RF circuits............................................................ 24

Receiver signal path ........................................................................................ 24

Transmitter signal path .................................................................................... 24

PLL................................................................................................................... 25

RF Key component placement......................................................................... 28

Troubleshooting................................................................................................ 29

Common circuit................................................................................................ 29

Power Supply Configuration ..........................................................................29

General instructions for Synthesizer troubleshooting ...................................... 31

26 MHz Reference Oscillator ( VCXO ) ........................................................... 31

Example Signal Measured at VCXO output (R420) ....................................... 32

VCO ...............................................................................................................32

Troubleshooting chart for the Synthesizer ....................................................... 33

Measurement points for the Synthesizer ......................................................... 34

Receiver Troubleshooting............................................................................... 37

Front End Module (FEM) control signals ......................................................... 37

Renesa FEM logic ..........................................................................................37

RFMD FEM logic ............................................................................................37

Measurements points....................................................................................... 38

Measurement points for the receiver .............................................................38

RH-54 Receiver ............................................................................................... 40

General Instructions for GSM850 RX Troubleshooting .................................. 40

General Instructions for GSM1900 RX Troubleshooting.................................. 43

RH-53 Receiver ............................................................................................... 46

General Instructions for GSM900 RX Troubleshooting .................................. 46

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General Instructions for GSM1800 RX Troubleshooting ................................ 48

RH-53/54 Transmitter Troubleshooting........................................................... 53

Measurement points for the transmitter ........................................................53

General instructions for TX troubleshooting ...................................................54

Troubleshooting chart for GSM900 transmitter .............................................. 56

Logic signals for the Front End Module ......................................................... 57

Renesa FEM logic ..........................................................................................57

RFMD FEM logic ............................................................................................58

Analog Power control signals (TXC, VPC, VDET) .........................................58

I/Q signals ...................................................................................................... 60

Alignment........................................................................................................... 61

Manual alignment with Phoenix ....................................................................... 61

RX calibration................................................................................................... 61

RX Band Filter Response ................................................................................ 64

Tx Power tuning............................................................................................... 64

I/Q tuning ......................................................................................................... 66

RF control ........................................................................................................ 69

Autotune (RH-53 with CMU200) .......................................................................70

File adjustments............................................................................................... 70

Phoenix setup.................................................................................................. 70

List of Figures Page No

Fig 1 BB test points...............................................................................................7

Fig 2 BB test points 2............................................................................................8

Fig 3 Phone is dead troubleshooting..................................................................... 9

Fig 4 Flash programming troubleshooting............................................................. 10

Fig 5 Phone jammed troubleshooting ................................................................... 11

Fig 6 Troubleshooting when Contact Service message seen............................... 12

Fig 7 No call troubleshooting................................................................................. 13

Fig 8 Phone is OFF:no current from charger ........................................................ 14

Fig 9 Display info:charger connected, not charging.............................................. 15

Fig 10 Microphone does not work.........................................................................16

Fig 11 Top: Earpiece does not work ..................................................................... 16

Fig 12 Headset does not work .............................................................................. 17

Fig 13 Vibra troubleshooting ................................................................................. 20

Fig 14 Receiver signal path................................................................................... 24

Fig 15 Transmitter signal path............................................................................... 25

Fig 16 Frequency plan .......................................................................................... 27

Fig 17 RF key component placement ................................................................... 28

Fig 18 Power supply configuration........................................................................29

Fig 19 UEM measuring points.............................................................................. 30

Fig 20 Measured signal at VCXO output............................................................... 32

Fig 21 Troubleshooting chart for synthesizer........................................................ 33

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Fig 22 Measurement points for Synthesizer.......................................................... 34

Fig 23 Measurement points for the VCO............................................................... 35

Fig 24 Measurement points for the FEM............................................................... 38

Fig 25 RX interface points between N600/SAW filters.......................................... 38

Fig 26 Serial Bus interface measurement points .................................................. 39

Fig 27 I/Q measurement points............................................................................. 39

Fig 28 RF controls................................................................................................. 40

Fig 29 Troubleshooting chart for GSM850 receiver ..............................................41

Fig 30 Measuring with oscilloscope ...................................................................... 42

Fig 31 Control values............................................................................................ 43

Fig 32 Troubleshooting chart for GSM1900 receiver ............................................44

Fig 33 Measuring with the oscilloscope ................................................................ 45

Fig 34 Control values............................................................................................ 46

Fig 35 Troubleshooting chart for GSM900 receiver ..............................................47

Fig 36 Measuring with oscilloscope ...................................................................... 48

Fig 37 Rf controls..................................................................................................49

Fig 38 Troubleshooting chart for GSM1800 receiver ............................................50

Fig 39 Measuring with oscilloscope ...................................................................... 51

Fig 40 Front End Module FEM..............................................................................53

Fig 41 MjoelnerN600 test points .......................................................................... 53

Fig 42 TXP and TXC test points............................................................................ 54

Fig 43 Control values............................................................................................ 55

Fig 44 Troubleshooting chart for GSM900 transmitter.......................................... 56

Fig 45 Signals .......................................................................................................57

Fig 46 Power control signals.................................................................................59

Fig 47 RX calibration............................................................................................. 61

Fig 48 Calibration tuning ....................................................................................... 62

Fig 49 Calibration tuning ....................................................................................... 62

Fig 50 Calibration tuning ....................................................................................... 63

Fig 51 Calibration tuning ....................................................................................... 63

Fig 52 TX tuning....................................................................................................64

Fig 53 TX tuning....................................................................................................64

Fig 54 TX tuning....................................................................................................65

Fig 55 TX tuning....................................................................................................65

Fig 56 TX tuning....................................................................................................66

Fig 57 i/Q tuning....................................................................................................67

Fig 58 I/Q tuning.................................................................................................... 67

Fig 59 I/Q tuning.................................................................................................... 68

Fig 60 I/Q tuning.................................................................................................... 68

Fig 61 I/Q tuning.................................................................................................... 69

Fig 62 RF controls................................................................................................. 69

Fig 63 Phoenix-GPIB card .................................................................................... 70

Fig 64 Set loss ......................................................................................................71

Fig 65 Set loss 2 ................................................................................................... 71

Fig 66 Set loss 3 ................................................................................................... 72

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Baseband Troubleshooting

■ Baseband test points

Figure 1:BB test points

Nokia Customer Care

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Figure 2:BB test points 2

■ Tr oubleshooting diagrams

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

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■ Phone is dead

This means that the phone do not draw any current at all when supply is connected and/or powerkey is pressed.

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

Figure 3:Phone is dead troubleshooting

Phone is dead

Yes

X105

VBAT = 3,6VDC

Yes

C103

L260,L261,L262,L263,L264,L265

C260,C261,C262,C263,C264,C265

Voltage = 3,6VDC

Yes

J404

Sleep-clock is

32.768 kHz, 1,8Vpp

Yes

J402

PURX = 1,8VDC,

1 sec. after power-key

is pressed

Yes

C227

VR3 = 2,78VDC

Check :

X105

Check :

C103

L260,L261,L262,L263,L264,L265

C260,C261,C262,C263,C264,C265

Check :

B200, C209, C210, PW B. Else

defective D200*

Check :

PWB.

Else defective D200*

Check :

C227, PWB.

Else defective D200*

Yes

26 MHz clock min. 300mVACpp,

R426

probe Cin=10-13 pF/10M

Yes

Check :

C227, C420, R420, PWB.

Else defective D200*

Check :

D450 (Flash).

Else defective D200*

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■ Flash programming does not work

The flash programming can only be done via the pads on the PWB (J396). In case of Flash failure in FLALI station, problem is most likely related to SMD problems. Pos-

sible 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 doesn't set FBUS_TX line low Because of the use of uBGA components it is not possible to verify if there is a short circu it in

control- and address lines of MCU (UPP) and memory (flash).

Figure 4:Flash programming troubleshooting

Flash prgramming

do not work

Error fro m p ro mmer:

"Phone doesn't set FBUS_T X line low"

Yes

J396, R108

Check connection between

pad 1,2 & 3 on J396

and R108

Yes

J409, J410, J411, J412

Voltage level at 1,8VDC

Yes

Try re a d in g MCU ID

with Phoenix.

Reading OK?

Yes

Try reading Flash ID

with Phoenix.

Reading OK?

Check :

R108, PW B

Check :

PWB.

Else defective D200*

Check :

PWB.

Else defictive D400*

Check :

Replace D450

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 can not be measured.

Figure 5:Phone jammed troubleshooting

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 i s

pressed

Yes

UI functionality,

and keys react

to pressure?

Yes

R426

26 MHz clock min.

300mVACpp,

probe Cin=10-13 pF/10M

Check :

B200, C209, C210, PW B.

Else defective D200*

Check :

PWB.

Else defictive D200*

Check :

D450, Keymat,

Lightguide, PWB .

Else defective D400*

Check :

C420, C426, R420,

R426, N600(Mjoelner)

Yes

Reflash phone

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■ Display information : "Contact Service"

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

It's individual test cases so the below lineup of error hunting's has no chronological order . Use common sense and experience to decide which test case to start error hunting at.

Figure 6:Troubleshooting when Contact Service message seen

Display shows

"Contact Service"

Yes

EarDa & MicDa

between

UPP and UEM?

MBUS interface

between

UPP and UEM?

AuxDa & UEMInt

between

UPP and UEM?

SleepX & SleepClk

between UPP & UEM?

TXI/QD & RXI/QD?

SIM interface between

UPP & UEM

Check :

PWB.

Else defective D200*

or D400*

Key is stucked

Flash checksum

y ASIC version vs. compilation flag, PMM checksum y PMM validity y Warrenty Information State y SIM-Lock

Check :

A-face, domesheet, PWB.

Reflash phone

Check :

PWB.

Else defective D450 (FLASH)

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

If the phone doesn't register to the network, the fault can be in either BB or RF . Only few signals can be tested since several signals is 'burried' 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.

Figure 7:No call troubleshooting

Phone do not register to

network

or phone cannot make a call

C222, C223, C224, C225,

C226, C227

Voltage = ~2,78VDC

All during GSM frame-

call mode.

Use TXP on C646 as trigger

Yes

C230, C231

Voltage = ~1,35VDC

All during GSM frame (call mode)

Use TXP on C646 as trigger

Yes

J421, J422, J423

Check RF serial bus during

GSM-frame :

Logic HIGH = 1,8VDC

Logic LOW = 0V DC

RFBUSC LK (J421),

RFBUSD A (J422),

RFBUSEN1X (J423)

Yes

R601, R603

Check analog signals during

GSM-frame (RX slot):

RXIP/N (R601) = 0-1,45VDC

RXQP/N (R603) = 0-1,45VDC

Check :

C222,C223, C224, C225,

C226, C 227 , P WB .

Else defective D200 or D400*

Check :

C230, C 231 , P WB .

Else defective

D200* or D400*

Check :

Else defective D200*

Check :

Else defective D200*

PWB.

or D400*

PWB.

or D400*

Yes

R610, R611

Check analog signals during

GSM-frame (TX slot):

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

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

Yes

Check :

R610, R 611 ,P WB .

Else defective D200*

or D400*

Check RF

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■ Charging troubleshooting

Figure 8:Phone is OFF:no current from charger

Phone is OFF - battery is

completely empty

(<=3,1VDC)

and no current from

charger when connected

RH-53/54

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

Check :

F100, L100, V100, C100, R200, System-connector.

Check :

F100, L100, V100, C100, R200, System-connector.

Yes

Defective

D200 or D400*

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Figure 9:Display info:charger connected, not charging

Display info when

charger is connected :

"Not charging"

R206

Voltage on R206 towards

D200 is ~0,8VDC

when power is connected.

Yes

R207

Voltage (use scope) on R207

towards D200 is ~0,9VDC at

peak.

Check :

X105, R202, R206, C240.

Check :

X105, R202, R207, C220.

Yes

R200

Voltage on R200 towards

D200 same as VBAT voltage

Yes

R200

Voltage rises slowly on

R200 towards D200 when

charger is connected.

Yes

Check :

PWB

Check :

R200, PWB.

Else defective D200*v

Check :

PWB.

Else defective D200*

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■ Audio troubleshooting 1, 2

Figure 10:Microphone does not work

Microphone do not work and

the isn't any mechanical

problem

RH-53/54

Z100

Check Z100 is

working correctly

(no short/open-circuit)

Replace :

Mic and micboot

Error still present

R165

Check voltage level on

R165 towards UEM (bias)

= 2,1V

Yes

R165, C168, PWB. Else defctive D200*

R153

Check voltage level on

R153 towards mic-lines (bias)

= 1,0V - 1,4V

R153, R157,C151, C152, C153, C154,R171, PWB.

Figure 11:Top: Earpiece does not work

Headset earpiece do not

work and the isn't any

mechanical problem

Replace :

Z100

Check :

R183, Z102

Check R183, Z102 is

working correctly (no open-circuit)

Replace :

C183 and/or Z102

Defective D200*

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■ Audio troubleshooting 3: Headset does not work

Figure 12:Headset does not work

Headset microphone do not

work and the isn't any

mechanical problem

Nokia Customer Care

Z101

Check Z101 is working

correctly

(No short/open circuit)

Yes

R151

Check voltage level on R151

towards UEM (bias)

= 1,0V - 1,4V

Yes

R151

Check voltage level on R151

towards UEM (bias) = 1,0V -

1,4V

Check XMIC line to UEM

(D200)

Error still present

Defective D200*

Replace :

Z101

Check :

R166, R151, C171

Check :

R156, C170, C174, C172,

R169

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Upper block failures

All checks can be done while the phone is partially disamsembled (no need for full reasembly inbetween debugging steps):

SIM failure (including insert SIM faults)

1. Flex B2B connector pressed in?

2. Change LCD can assembly (for new flex) works?

3. C314 (VSIM cap) short circuitting?

4. C313 (SIMIO cap) short circuitting?

5. Voltages (SIM startup sequence)? Board to Board connector pin17

6. Change main PWB (UEM)?

The hardware of the SIM interface from UEM (D200) to the SIM co nnector can be teste d wit hout 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, whereafter it will display ”Insert SIM card”.

VSIM – Board to board connector pin 17 Reset – Board to board connector pin 29 Clock – Board to board connector pin 20 Data – Board to board connector pin 19

Check for SIM voltage during power-up

Ch1 : VSIM Ch2 : RESET

Ch3 : CLOCK Ch4 : DATA

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The error ”SIM card rejected” means that the A TR 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.

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

Normal SIM power-up sequence

Ch1 : VSIM Ch2 : RESET

Ch3 : CLOCK Ch4 : DATA

Vibra failure

1. Flex B2B connector pressed in?

2. Change C2 cover assembly(new vibra)/Vibra works?

3. Change LCD can assembly (new flex) works?

4. Change main PWB (UEM)?

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Figure 13:Vibra troubleshooting

Start

Wrong setting or

software error.

Contact problem.

Mechanical problem

Is there any

vibration?

Yes

- counterweight is blocked

Defective o r missing

vibra.

Defective UEM.

RH-53/54

Is there

sufficient

vibration?

Yes

Vibra is

constantly

switched

on?

Intermittent

vibration?

Acoustical

noise?

Yes

Software error

Contact problem.

Defective vibra. Defective UEM.

Software error.

Defective UEM.

Short circuit.

Yes

Bad connection.

Defective vibra.

Mechanical problem

- counterweight hits LCD can/C2 cover

Loose parts in

phone.

Speaker failure

1. Flex B2B connector pressed in?

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Display failure

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2. C2 cover mounted correct (red snap not vissible)?

3. Check if system connector is misplaced slightly?

4. Check for ”headset inserted symbol” in display?

5. Change speaker chamber/antenna works?

6. Change LCD can assembly (for new flex) works?

7. Change main PWB (UEM)?

1. Flex B2B connector pressed in?

2. Display B2B connector pressed in (press through hole in C2 cover assembly)?

3. Change display works?

4. Change LCD can assembly (for new flex) works?

5. R316 (LCDRESETX) missing?

Fold detection failure 1: Check if magnet is mounted on bottom side of C2 cover assembly (with a spare screw) 2: Check if N306 (Hall IC) is mounted?

Note: Don’t try and rework flex!! Handling is likely to cause the solder pads to brake or disconncect

from track, which cannot be repaired in a reliable wa y by resoldering. Only reliable repair option is to change the flex (LCD can assembly)!

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Introduction to RH-53/54 RF Troubleshooting

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

• RF measurements should be done with a GSM tester and a suitable connector to the general RF input/output. That connection is for tun ing a nd te sting the whole RF in the phone.

• RF test measurements should be done with a Spectrum Analyzer and a high-frequency 500ohm passive probe, for example HP54006A. Use some sort of DC blocking device, to avoid loading the circuit or the SPA with DC. (Note that when measuring with the 500ohm 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 analyzer).

• LF (Low frequency) and DC measurements should be done with a 10:1 probe and an oscilloscope. The probe used in the following is 10MΩ/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 connector. Remember to in clude the loss in the module rep air jig and the coaxial cable when realigning the phone.

Most RF semiconductors are static discharge sensitive. So ESD prot ection must be taken during repair (ground straps an d ESD soldering irons). Mjoelner is mo isture 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 or checking if the component is missing from PCB. Capacitors can be checked for short-circuit 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 “low band” will be used to describe both GSM850 - EGSM and GSM900, while “high band” will be used for both PCN and GSM1800.

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General description of the RF circuits

In the following general desriptions different colours are used in the block diagram. The Lowband signal route is shown in red, the Highband route in green and the common signal lines are shown in blue.

■ Receiver signal path

The signal from the antenna pad is routed to the Front End Module (FEM - N700). The FEM contains a diplexer and a switch system controlling the direction of the signals, either routing the TX signal from the Power Amplifier (P A) to the anten na or routing the received signal from the antenna to either the Lowband (850/900 MHz) or the Highband (1800/1900 MHz) input on the RF IC (N600).

Figure 14:Receiver signal path

Ant

Diplexer

RX/TX switch

PA and detector

GSM RX

PCS RX

supply

F X R D D V

LNA Bias

INMH

INPL

INML

INPM

INMM

INPH

ASIC

LNA

Pre-gain

SAW

RX850/ 900

SAW

RX1800/ 1900

filter

222

1/2 1/4

Mjølner

BBAMP

B B X R D D V

BIQUAD

DCN1

LPF1

DCN1

LPF1

AGC

LPF2

BIQUAD

LPF2

DCN2

VRX

RXIP RXIM

RXQP

RXQM

VR6

1/4

1/2

The Lowband signal from the FEM is routed to the SAW filter (Z602). The purpose of the SA W filter is to provide out-of band blocking imummity 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.

The output from the mixer is fed to Baseband part of Mjoelner where the signals amplified in the BBAMP aand low pass filteret in LPF1 before the DC compensation circuits in DCN1. The DCN1 output is followed by a controlled attenuator and a se cond lowp ass filter LPF2. The ou tput from LPF2 is DC centeret in DCN2 before being feed to the BB for demodulation.

The Highband signal chain is similar to the lowband.

■ Transmitter signal path

The I/Q signal from the BB is routed two the modulators for both Lowband and Highband. The output of the modulators is either terminated in a SA W filte r (Z603) for the Lowb and or a balun for the Highband. The signals from the SAW and Balun are then amplified in the Power Amplifier (PA) located in the Front End Module (FEM - N700) where the gain control t akes place. In

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order to control the TX level a sample of the signal is taken in the FEM and used in the power loop amplfier in Mjoelner to establish the right output power. The selection of which amplifier chain in the FEM to be active is controlled through the 4 controllines VC1, VC2, BS and Vtx.

Figure 15:Transmitter signal path

Ant

Diplexer

RX/TX switch

PA and detector

Vapc

Vsense

VC1 (TX/RX GSM) VC2 (TX/RX DCS)

VTX Band sel

PCN/PCS

GSM

PCN/PCS

Balun

VTX

SAW

PW-loop

filter

VPCTRL_G

VANTL VANTM

VANTH

VB_DET

VTXLOL

VTXLOH

VTXBH VTXBL

OUTHP OUTHM

OUTLP OUTLM

DET PLFB1 PLFB2

ASIC

RF Controls

Open collector

VDDDIG

VDDRXBB

PWC

TXP

Mjølner

1/2

TXC

VDDTX

Supply

filter

1/4

VTX

TXQP/TXQM

VBATTRF

VR2

TXC

TXP

TXIP/TXIM

■ 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 synthesizercircuit is used. All blocks for the PLL except for the VCO, reference X-tal and loopfilter is lo cated in the Mjoelner IC, N600.

The reference frequency is generated by a 26MHz V olt age Controlled X-tal Oscillator (VCXO) located in the Mjoelner IC. Only the X-tal is external. 26MHz is supplied to BB where a divideby-2 circuit (located in the UPP IC) generates the BB-clock at 13MHz. The reference frequency

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RH-53/54

Nokia Customer Care

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 synthesizer 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 signal, which is made differential through a balun. This signal is fed to the Prescaler and N-divider in Mjoelner, these 2 block 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 detector controls the charge pump to either charge or discharge the capacitors in the loopfilter . By charging/discharging the loop filter 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.

The frequency plan is shown in the figure below:

Table 1: Frequency table

Frequency

Band

GSM 850

EGSM 900

GSM 1800

Channel #

RX 128 – 251 869.2 – 893.8 3476.8 – 3575.2

TX 824.2 – 848.8 3296.8 – 3395.2 RX 975 – 1023

1 – 124 TX 880.2 – 914.8 3520.8 – 3659.2 RX 512 – 885 1805.2 – 1879.8 3610.4 – 3759.6

TX 1710.2 – 1784.8 3420.4 – 3569.6

System Frequency Band

[MHz]

925.2 – 959.8 3700.8 – 3839.2

PLL Frequency Band

[MHz]

PCN RX 512 – 810 1930.2 – 1989.8 3860.4 – 3979.6

TX 1850.2 – 1909.8 3700.4 – 3819.6

According to the figures above the PLL must be able to cover the f requency range 3420.4MHz to 3839.2MHz for the GSM900/1800 and 3296.8 to 3979.6MHz for the GSM850/1900.

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RH-53/54

To PCN RX

mixer

ASIC

2 22

To GSM RX

mixer

Nokia Customer Care

Figure 16:Frequency plan

1/2

222

To PCN

Modulator

Mjoelner

N600

1/4

To GSM

Modulator

VDDRXBB

Resistor Ext/R2H/R2

VBEXT

Ref.

filte

VREF

RFCONV_0(9)

Main Bias

Circuit

VDDLO VDDPLL VDDPRE

Buffer

VDDCP

CPOUT

VDDXO VDDBBB

REFOUT

XTALM

XTALP

INPLO INMLO

VDDDIG VDDDL

SELADDR RESETX

RF_EN RF_CLK RF_DATA

RESETX

VCOSENSE

Charge

Pump

Lock Detect

1/2

level shift

I/O

64/

RBEXT

2,7k

LOCNT

REFCNT

NDIV ADIV

VCXO Bias

VDDRXBB

SENSE

Rpa

PA vendor

indication

33k : Hitachi 82k : RFMD

RDIV

R2H/R2

VDDTX

Sensor

BIST / Temp.

AFC/CAL

Control

Buf/ AGC

Digital

Control

Synth supply

filter Vcp

supply

filter PLL

loop filter

VCXO supply

filter

26MH

VPLL

VXO

REFOUT

VVCO

VBB (1.8V)

Ref clk set

RESET_X_M

RFBUSX RFBUSDA RFBUSCLK

VR5

VR3

VR7

VR2 VIO

VIO GENIO6

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■ RF Key component placement

Figure 17:RF key component placement

RH-53/54

Table 2: Key component placement tABLE

N600 Mjoelner RF IC Z601 PCN RX SAW High band RX SAW filter Z602 EGSM RX SAW Low band RX SAW filter Z603 EGSM TX SAW Low band TX SAW filter B600 26 MHz crystal G600 VCO ( 3.6 GHZ VCO ) N700 Front End Module (FEM) X700 RF connector

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Troubleshooting

■ Common circuit

The power supply and the synthesiser is common for RH53/54, except for the synthesiser ranges.

Power Supply Configuration

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

The power supply configuration used in the phone is shown in the block diagram below:

Figure 18:Power supply configuration

Internal Mjoelner

VR2

2.78 v +/-3% @100 mA

TX modulator

VR3

VR5

UEM

VR1a

VrefRF01

VR6

VIO

VR7

Modulator loading

netwok

2.78 V +/-3%

@20 mA

2.78 V +/-3%

@50 mA

4.75 V +/-3%

@10 mA

1.35 V +/- 2% < 100 uA

2.78 V +/-3% @50 mA

1.8 V +/- 4.5% @150 mA

2.78 V +/- 3% @45 mA

Power Loop Amp

Digital control logic

VCXO Power Supply

Baseband clk buffer

Dividers & LO buffer

PLL Pre-scaler

PLL Counters

PLL charge pump

Ref. volt for Mjoelner

LNA and Pre-gain

BB Section

Digital com. interface

VCO module

VCO

VR4

Vbat

2.78 V+/- 3% @50 mA

Not used

Front End Module

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The names to the left are the signal names used on the RF schematics

Table 3: Supply names

RH-53/54

Supply

name RF

Supply

name UEM

Min Typ Max Unit

VCP VR1A 4.54 4.75 4.9 V VTX VR2 2.64 2.78 2.86 V VXO VR3 2.64 2.78 2.86 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

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

Figure 19: UEM measuring points

VR2=VTX (C223)

VR6=VRX (C225) VR1A=VCP (C221)

VR7=VVCO (C224)

VR3=VXO (C227)

VR5=VPLL (C226)

VrefRF01=VREF1 (C231)

VIO=VBB (C218)

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

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■ General instructions for Synthesizer troubleshooting

Start the Phoenix-Service-Software and Select:ProductRH53/54 or scan

Select:Testing RF Controls Band XX, se table below Active UnitRX Operation ModeContinuous RX/TX ChannelYY se table below

The signal from the VCO is measured at R640 using a spectrum analysator and a 500ohm p assive probe. The frequency should be as found in the table below and the power should be around –20dBm.

Table 4: Frequency table

ZZ XX YY PLL frequency [MHz]

RH-54 GSM850 189 3525.6 RH-53 GSM900 36 3768.8 RH-53 GSM1800 700 3685.6 RH-54 GSM1900 661 3920

■ 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 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 R420 at the end towards the UPP, see “Measurement points for the Synthesizer”. 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.

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Example Signal Measured at VCXO output (R420)

Figure 20:Measured signal at VCXO output

RH-53/54

VCO

The VCO is generating frequencies in the range of 3420.4MHz – 3839.2 MHz for the RH-53 and in the range 3296.8 to 3979.6 MHz for RH-54 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 either by 2 or 4 in order to generate all channels in EGSM and PCN respectively . Frequency of the VCO is controlled by a DC-volt age (Vctrl) coming from the loopfilter. The loopfilter consists of the component s R618, R619 and C639-C641. Range of the Vctrl when the PLL is running (locked) is 0.4V – 4.3V. 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 true if the VCO is working and if the VCO power supply is at present (2.7V).

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RH-53/54

■ Tr oubleshooting chart for the Synthesizer

Figure 21:Troubleshooting chart for synthesizer

From Phoenix chose:

File > product > RH-53/54 Maintenance > Testing > RF controls > band > RX >

continous > channel

Band and channel according to the previous table

Nokia Customer Care

Spectrum analyser

VCO frequency (R640)

MHz (see table)

Osciloskope

VXO Power supply

(C618)

2.78Vdc

Yes

Osciloskope

VXO Power supply

(C620)

2.78Vdc

Yes

Osciloskope

VCXO output

(R420) 26MHz

approx. 700mVpp

Yes

PLL block functional

Check UEM, SW

Phone not in function

Check R605, SW

Phone not in function

VCXO is not functional

Check crystal (B600)

Osciloskope

PLL Power supply

(C614, C634)

All 2.7Vdc

Check UEM, SW

Phone not in function

Yes

Osciloskope

PLL Charge pump

supply (C616)

All 4.75Vdc

Check R603, C645, UEM,

Phone not in function

N600 not functional

Yes

Spectrum analyser

VCO output (R640)

some signal between

3 and 4 GHz

VCO (G600) is not functional

Check Loop filter (R618,

R619, C639-C641)

YES

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Nokia Customer Care

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

Turn on the phone and check VCXO Power supply (C620) = 2.7V VCXO output (R420 – end not connected to C420) is 26MHz and approx. 700mVpp If this is not the case check the reference crystal (B600) and Mjolner (N600) as well as R420,

R426, C420, C426.

■ Measurement points for the Synthesizer

Figure 22:Measurement points for Synthesizer

Charge pump Supply C616)

VCXO Out (R420)

VPLL (C614, C634)

VXO (C620) VXO (C618)

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Figure 23:Measurement points for the VCO

Vctl

VVCO (C624)

VCO out (R640)

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Receiver Troubleshooting

■ Front End Module (FEM) control signals

Depending on the vendor of the Front End Module (FEM), dif ferent timing of the control signals are present. The SW suppoerts both FEMs. R629 tells the SW which FEM control should be active. Renesas FEM control is used when R629 is 18K and RFMD FEM control is used when R629 is 82K.

If the FEM is exchanged with an other type, the R629 must be changed, too.

Renesa FEM logic

Table 5: Renesa FEM logic

Mode Vtx BS VC1 VC2

VTX_B_P VTX_B_P Vant1 Vant2

Low Band RX 0 0 0 0

Low Band TX 1 0 1 0

High Band RX 0 1 0 0

High Band TX 1 1 0 1

RFMD FEM logic

Mode VTX_B_P VTX_B_P Vant1 Vant2 Idle 0 0 0 0 Low Band RX 0 0 1 0 Low Band TX 1 0 1 0 High Band RX 0 1 1 0 High Band TX 1 1 1 0

Table 6: RFMD FEM logic

Vtx BS VC1 VC2

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■ Measurements points

Measurement points for the receiver

Figure 24:Measurement points for the FEM

RH-53/54

BS (C709)

RX1800

VC1 (C708)

RX900

VTX (J700)

VC2 (C730)

Figure 25:RX interface points between N600/SAW filters

L610/612 END

L602/603 END

Z601out

Z602out

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Figure 26:Serial Bus interface measurement points

RESETX

RFBUSDA

Mjoelner seriel interface

RFBUSSENX

RFBUSCLK

Figure 27:I/Q measurement points

RXQP RXQM

RXIP RXIM

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■ RH-54 Receiver

General Instructions for GSM850 RX Troubleshooting

Connect the phone to a PC with the module repair jig. Start Phoenix and establish connection to the phone

Select->File

->Scan for product->CTRL-R

Select-> Testing -> RFcontrols Select:

RH-53/54

Band: GSM850

Active Unit: RX

Operation Mode: Continuous

Rx/Tx Channel: 190

AGC: 9

The setup should now look like this:

Table 7: Band values

Figure 28:RF controls

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RH-53/54

Apply -55dBm

881.6MHz

Offset 67.71kHz

from generator to X700

Osciloscope at

Signal 580mVpp

DC offset 1.35V Freq. 67.71kHz

(ch 190)

RX I/Q.

Nokia Customer Care

Figure 29:Troubleshooting chart for GSM850 receiver

Yes

GSM850 OK

Spectrum analyser

RX level (FEM, N700) at

RX900/850 point

-56 dBm

Yes

Spectrum analyser

SAW filter Z602 output

-65dBm

Yes

Spectrum analyser

Check signal after inductors

L602 and L603

-65dBm

Yes

check VC1, VC2, Vtx and

BS, according to logic table

Check Z602

Check inductor

L602, L603

Osciloscope

at N700

Yes

Check FEM

N700

Check Mjoelner

N600

Osciloscope VRX 2.78 Vdc (C225) Check Mjoelner serial

interface

Check UEM, UPP

Yes

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Nokia Customer Care

By measuring with an oscilloscope at RXIP or RXQP on a working GSM 850 receiver this picture should be seen

Signal amplitude peak-peak 588 mV DC offset 1.33 V

Figure 30:Measuring with oscilloscope

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RH-53/54

■ General Instructions for GSM1900 RX Troubleshooting

Connect the phone to a PC with the module repair jig. Start Phoenix and establish connection to the phone

Select->File

->Scan for product->CTRL-R

Select-> Testing -> RFcontrols Select:

Table 8: Band values

Nokia Customer Care

Band: GSM1900

Active Unit: RX Operation Mode: Continuous Rx/Tx Channel: 661 AGC: 9

The setup should now look like this:

Figure 31:Control values

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Figure 32:Troubleshooting chart for GSM1900 receiver

Apply -55dBm

881.6MHz (ch 190)

Offset 67.71kHz

from generator to X700

Osciloscope at

RX I/Q.

Signal 580mVpp

DC offset 1.35V

Freq. 67.71kHz

Yes

RH-53/54

GSM850 OK

Spectrum analyser

RX level (FEM, N700) at

RX900/850 point

-56 dBm

Yes

Spectrum analyser

SAW filter Z602 output

-65dBm

Yes

Spectrum analyser

Check signal after inductors

L602 and L603

-65dBm

check VC1, VC2, Vtx and

BS, according to logic table

Check Z602

Check inductor

L602, L603

Osciloscope

at N700

Yes

Check FEM

N700

Check Mjoelner

N600

Yes

Osciloscope VRX 2.78 Vdc (C225) Check Mjoelner serial

interface

Check UEM, UPP

Yes

44 COMPANY CONFIDENTIAL ISSUE 1 09/2004

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Nokia Customer Care

By measuring with an oscilloscope at RXIP or RXQP on a working GSM1900 receiver this picture should be seen

Signal amplitude peak-peak 588 mV DC offset 1.33

Figure 33:Measuring with the oscilloscope

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■ RH-53 Receiver

General Instructions for GSM900 RX Troubleshooting

Connect the phone to a PC with the module repair jig. Start Phoenix and establish connection to the phone

Select->File

->Scan for product->CTRL-R

Select-> Testing -> RFcontrols

RH-53/54

Select:

Band: GSM900

Active Unit: RX Operation Mode: Continuous Rx/Tx Channel: 37 AGC: 9

The setup should now look like this:

Figure 34:Control values

Table 9: Band values

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RH-53/54

Apply -55dBm

Offset 67.71kHz

from generator to

antenna pad

Osciloskope at

Signal 588mVpp

DC offset 1.35V Freq. 67.71kHz

942.4 MHz

RX I/Q.

Nokia Customer Care

Figure 35:Troubleshooting chart for GSM900 receiver

Yes

GSM1800 OK

Check RX/TX

switch at RX900

Z700

-56 dBm

Yes

Spectrum analyser

SAW filt er Z 602 output

-65dBm

Yes

Spectrum analyser

Cehck signal after inductors

L602 and L603

-65dBm

check VC1 and VC2 at

Check Z602

Check inductor

L602, L603

Osciloskope

Z700

Signal=0Vdc

Yes

Check RX/TX

switch

Z700

Check Mjoelner

N600

Yes

Osciloskope

VRX 2.7 Vdc

Check Mjoelner serial

interface

Check Baseband

Yes

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Nokia Customer Care

By measuring with an oscilloscope at RXIP or RXQP on a working GSM900 receiver this picture should be seen

Signal amplitude peak-peak 588 mV DC offset 1.33 V

Figure 36:Measuring with oscilloscope

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

->Scan for product->CTRL-R

Select-> Testing -> RFcontrols

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RH-53/54

Select:

Band: GSM1800

Active Unit: RX Operation Mode: Continuous Rx/Tx Channel: 700 AGC: 9

The setup should now look like this:

Nokia Customer Care

Table 10: Band values

Figure 37:Rf controls

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Nokia Customer Care

Figure 38:Troubleshooting chart for GSM1800 receiver

Apply -55dBm

1842.8MHz (ch 700)

Offset 67.71kHz

from generator to X700

Osciloscope at

RX I/Q.

Signal 580mVpp

DC offset 1.35V Freq. 67.71kHz

Yes

RH-53/54

GSM1800 OK

Spectrum analyser

RX level (FEM, N700) at

RX1800/1900 point

-56 dBm

Yes

Spectrum analyser

SAW filter Z601 output

-65dBm

Yes

Spectrum analyser

Check signal after inductors

L610 and L612

-65dBm

check VC1, VC2, Vtx and

BS, according to logic table

Check Z601

Check inductor

L610, L612

Osciloscope

at N700

Yes

Check FEM

N700

Check Mjoelner

N600

Yes

Osciloscope VRX 2.78 Vdc (C225) Check Mjoelner serial

interface

Check UEM, UPP

Yes

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By measuring with an oscilloscope at RXIP or RXQP on a working GSM1800 receiver this picture should be seen

Signal amplitude peak-peak 588 mV DC offset 1.33

Figure 39:Measuring with oscilloscope

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52 COMPANY CONFIDENTIAL ISSUE 1 09/2004

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RH-53/54 Transmitter Troubleshooting

The troubleshooting of the transmitter for the different phones is similar, meaning that the low band, 850/900 MHz, has similar values and the high band, 1800/1900 MHz, has simila r values. The only differences are which selection of product done in Phoenix.

Measurement points for the transmitter

Figure 40:Front End Module FEM

R714 R711

VTX (J700)VPC (R712)

TXQ

VDET (R713)

BS (C709)

VC1 (C708)

VC2 (C730)

Figure 41:MjoelnerN600 test points

Z603 in Z603 Out

TXI

X700

VPC (C644)

T600 in

T600 Out

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RH-53/54

Figure 42:TXP and TXC test points

General instructions for TX troubleshooting

Apply an RF-cable to the RF-connector to allow the transmitted signal act as normal. RF-cable 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

->Scan for product->CTRL-R

Select-> Testing -> RFcontrols

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RH-53/54

Select:

Table 11: Band values

Band: XX

Active Unit: TX Operation Mode: Burst Rx/Tx Channel: YY TX Power level ZZ TX Data Type Random

Select ”XX” , ”YY” and ”ZZ” according to the table below

Nokia Customer Care

Phone XX YY ZZ

RH-54 GSM850 189 5 RH-53 GSM900 37 5 RH-53 GSM1800 700 0 RH-54 GSM1900 661 0

Your screen should look like this:

Table 12: Values

Figure 43:Control values

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Nokia Customer Care

Measure the output power of the phone; it should be around 32.5 dBm for low band and 29.5 dBm for highband. Remember the loss in the jig; around 0 dB for the low band and 0.1 dB for the high band.

Troubleshooting chart for GSM900 transmitter

For the spectrum analyzer measurements in the following chart use the 500ohm passive probe giving an approximately 20 dB lower reading than indicate in the following figures. Since the signal measured is bursted it is advised to set the analyzer to maxhold.

Figure 44:Troubleshooting chart for GSM900 transmitter

Signal ok on

GSM tester

SPA Burst

Power

Check PA input

power

Output power

Mjoelner

Yes Yes

Yes

Yes Yes

Check frequency,

TXC, PLL, Vdet, I/

Signal ok on

GSM tester

Check I/Q

Yes

Change FEM

Power

laccording to

level

NoNo

TX Power

tuning working

Check DC

signals

Change FEM,

loop, Z603/T600

Yes

Check channels

and bands

Change FEM

(N700)

Check I/Q, PLL,

TXC, DC

Z603/R714

(T600/R711)

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32.5 dBm

(29.5 dBm)

Nokia Customer Care

Figure 45:Signals

+ 2 dBm + 4 dBm

FEM

N700

VC1 VC2 VTX BS

Det Max PW: 1.13 vdc Min PW: 0.22 Vdc

Names in () is for high band All the red signals are pulsed with the burst The Green "DC" signals are pulsed with the burst In local mode random burst RF signals can be demodulated by a GSM tester

Vpc R712

Max PW: 1.2 Vdc

Min PW: 0.65 Vdc

Logic signals for the Front End Module

Attenuator

R714

(R711)

TXC (R620) Max PW 1.6V

Min PW 0.6 V

TXP (C646) 2.7V

Opamp (C644) Max PW 1.2 V

Min PW 0.65

R610

R611

Z603

(T600)

Mjoelner

N600

Depending on the vendor of the Front End Module (FEM), dif ferent timing of the control signals are at present:the SW supports both FEMS. R629 tells the SW which FEM control should be active. Renesas FEM control is used when R629 is 18K and RFMD FEM control is used when R629 is 82K.

If the FEM is exchanged with an other type, the R629 has to be changed, too.

Renesa FEM logic

Table 13: Renesa FEM logic

Mode Vtx BS VC1 VC2

VTX_B_P VTX_B_P Vant1 Vant2 Low Band RX 0 0 0 0 Low Band TX 1 0 1 0 High Band RX 0 1 0 0 High Band TX 1 1 0 1

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RFMD FEM logic

Table 14: RFMD FEM logic

Vtx BS VC1 VC2

Mode VTX_B_P VTX_B_P Vant1 Vant2 Idle 0 0 0 0 Low Band RX 0 0 1 0 Low Band TX 1 0 1 0 High Band RX 0 1 1 0 High Band TX 1 1 1 0

Analog Power control signals (TXC, VPC, VDET)

RH-53/54

The pictures in the following page show the typical shapes of the control signals low ba nd, right side it for highest power – left side for lowest power . In all the pictures TXP is used a the trigger point and is seen in the top of each picture. The difference between the high band and the low band is that he high band signals looks the same with only small changes in level. The activating of high band Vdet starts 5us earlier than for low band.

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Figure 46:Power control signals

High Power Low Power

TXC TXC

VPC VPC

VDET VDET

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I/Q signals

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

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Alignment

■ Manual alignment with Phoenix

The alignment/calibration is the same in both GSM900/850 and GSM1800/1900 except for the channels and frequencies. Only the the procedures for GSM900/GSM1800 are shown.

In Phoenix select connection Fbus scan product. 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 0dB for 900 and 0.1dB for 1800. Use CMD55,CMU200 or other suitable device. Default channels are 37 for GSM900 and 700 for GSM1800 (Ch 190 and 661 for GSM850/1900). The alignments and calibrations mu st 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 . In some windows the saving is done without any warning or secon d approval as soon as you stop or end.

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 Tuning, RX Calibration Select band GSM900 Press start

Figure 47:RX calibration

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Follow the description in Phoenix, setting up the signal generator as described

Figure 48:Calibration tuning

RH-53/54

Press the OK button

Figure 49:Calibration tuning

Press the Save&Continue botton.

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Follow the description in Phoenix, setting up the signal generator as described

Figure 50:Calibration tuning

Press the OK button

Figure 51:Calibration tuning

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Press the Save&Continue botton

Note! You have to follow the shown procedure. It is not possible to tune the high band alone. You need to make a tuning of the low band first to come to the high band. You can stop at any time by switching off the menu. If the values are outside internal specs, you can not save them and have to leave the tuning without saving.

■ RX Band Filter Response

Normally not needed in repair.

■ Tx Power tuning

Select Tuning, Tx Power Level Tuning

Figure 52:TX tuning

RH-53/54

Press start and follow the instructions in the pop-up window

Figure 53:TX tuning

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Set the spectrum analyser or GSM tester for the required settings and press “OK” If a GSM tester is used, set the TX data type to random so that the tester can trig on the signal.

Figure 54:TX tuning

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

Tune the base level to –25dBm When done press Save&Continue and Phoenix will automatically shif t from lowband t o

highband. At the same time the intermidiate values are calculated, but that is firs t seen next time you start a tuning.

Figure 55:TX tuning

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Set the spectrum analyser or GSM tester for the required settings and press “OK” . If a GSM tester is used, set the TX data type to random so that the tester can trig on the signal.

Figure 56:TX tuning

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

Tune the base level to –25dBm. When done press Save&Continue. The intermediate results are then calculated.

The procedure has to be followed. First low band tuning and then high band tuning. You do not need to change anything.

■ I/Q tuning

Select Tuning, Tx IQ tuning, TX Data Type “random” for a GSM tester like CMU200 or 1/0 for SPA measuring.

CMD55 shows the same as a spectrum analyzer when I/Q tuning is selected. CMU200 shows the carrier and sideband supression directly as figures in the modulation mode.

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Figure 57:i/Q tuning

Press Start

Figure 58:I/Q tuning

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Set the spectrum analyser or GSM tester for the required settings and press “OK”

Figure 59:I/Q tuning

RH-53/54

Begin tuning with data from selected place. Tune DC offset values to lowest carrier. Use Side arrows or +, - . Tune Amplitude and phase to lowest sideband.

When satisfied with the result, press Next. (The sidebands should hardly be visible).Or for CMU200 the supression should be better than -40dBc.

Figure 60:I/Q tuning

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Set the spectrum analyser or GSM tester for the required settings and press “OK”

Figure 61:I/Q tuning

Press Start to begin tuning with data from selected place. Tune DC offset values to lowest carrier. Use Side arrows or +, - . Tune Amplitude and phase to lowest sideband. When satisfied with the result, press Finish. (The sidebands should hardly be visible).

■ RF control

The purpoase is 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 . If you want to tune or calibrat e at other channels or levels than the default for that function, you can activate RF control at the same time and change the wanted parameters.

Figure 62:RF controls

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Autotune (RH-53 with CMU200)

■ File adjustments

Edit the file RH_53_tunings.ini and save it in the product folder under Phoenix with the right name. It defines the target values for the tu nings which need targets or can be a general one that only needs small updates for the values that might change (e.g. the base target).

Edit the file autotune_RH-53.ini and save it in the product folder under Phoenix with the right name.

Change the Baselevel init values so that the expected base coefficient is among them. It is not absolutely needed but it speeds up the tuning. Larger steps can be used but with lower accuracy.

Eventually, change also the Coeff init values if the tuning deviates too much from the target. The lowest coefficient must be very close to 0. Check how the power tuning goes an d try with

some changes.

In case of edge capability, copy from RH-12 and make some changes. RH-12 is for Gemini engine, RH-53 is for Mjoelner engine.

For autotuning, please see also TB “Autotuning function in Phoenix”.

■ Phoenix setup

In Phoenix tools-options-gpib card select the type of card used. Press start to check if the equipment can be found.

Figure 63:Phoenix-GPIB card

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With a PKD-1NS dongle the loss in cables and jigs has to be set, and the jig type must be defined to the product. When that is done the PKD-1 donkle can be used, and the losses can not be changed with that dongle.

Figure 64:Set loss

Select or add a jig and define the losses

Figure 65:Set loss 2

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Make sure the product has the right type of jig. (At the moment new products like RH-54 can not be added)

Figure 66:Set loss 3

Note! CMU200: Remember that CMU200 is left as it was set in the autotune. Attenuation settings are at 0.

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