Nokia NSB-1 Series Guide

NSB–1/3 Series Transceivers

PAMS Technical Documentation

Original 06/98

Troubleshooting

Instructions

PAMS

Technical Documentation

NSB–1/3

Troubleshooting Instructions

Page 2 Original 06/98

CONTENTS

Page No

Trouble Shooting 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Phone is totally dead 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Flash programming doesn’t work 4. . . . . . . . . . . . . . . . . . . . . . .

Flash Programming (1) 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Flash Programming failure (2) 7. . . . . . . . . . . . . . . . . . . . . . .

Power doesn’t stay on, or phone is jammed 8. . . . . . . . . . . . . .

Display Information: Contact Service 9. . . . . . . . . . . . . . . . . . . .

The phone doesn’t register to the network or phone doesn’t make a call 9

Phone register failure 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Instructions for RX troubleshooting 12. . . . . . . . . . . . . . . . . . .

Instructions for TX troubleshooting 14. . . . . . . . . . . . . . . . . . .

Fault finding chart for 13 MHz oscillator 16. . . . . . . . . . . . . . .

Fault finding chart for VHF VCO 17. . . . . . . . . . . . . . . . . . . . . .

Fault finding chart for UHF VCO 18. . . . . . . . . . . . . . . . . . . . . .

SIM card is out of order 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SIM Card failure 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Audio failure (1) 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Audio failure (2) 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Charger failure 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PAMS

Technical Documentation NSB–1/3

Troubleshooting Instructions

Page 3

Original 06/98

Trouble Shooting

The following hints should facility finding the cause of the problem when

the circuitry seems to be faulty. This trouble shooting instruction is di-

vided following section.

1. Phone is totally dead

2. Flash programming does not work

3. Power does not stay on or the phone is jammed

4. Display information: Contact Service

5. Phone does not register to the network or phone does not make a call.

6. Plug in SIM card is out of order ( insert SIM card or card rejected).

7. Audio fault.

8. Charging fault

The first thing to do is carry out a through visual check of the module. En-

sure in particular that:

a) there are not any mechanical damages

b) soldered joints are OK

PAMS

Technical Documentation

NSB–1/3

Troubleshooting Instructions

Page 4 Original 06/98

Phone is totally dead

This means that phone doesn’t take current at all when the power switch

is pressed or when the watchdog disable pin (X001 pin 11) is grounded.

Used battery voltage must be higher than 3.0 V. Otherwise the hardware

of CCONT (N100) prevents totally to switch power on.

Phone is totally dead

YES

Voltage at pin 29 of CCONT (N100)

is 3.6 V

NO Faulty circuit N100

YES

N100 pin 55 (VBB) 2.8 V

N100 pin 25 (VXO) 2.8 V

when PWR switch is pressed

or watchdog disable pin is grounded

NO CCONT (N100) pin 29 0V when

PWR switch is pressed or

watchdog disable is grounded

YES

See section: Power Doesn’t Stay On

YES

Faulty circuit N100

NO Check X99,R103

Check UI module

NO Failure in VBAT line

Check X101, X102

Check VBATT at CCONT

(N100 pins 8,12,...) =3.6V

Flash programming doesn’t work

There are two possibilities to route programming voltage VPP.

– If regulator N200 is used the programming voltage comes from the reg-

ulator (VPPSW) via UI–connector to flash memory D210.

– Other way is to route Vpp from CCONT pin36 to UI–connector and

again to flash memory.

In flash programming error cases the flash prommer can give some in-

formation about a fault.

The fault information messages could be:

– MCU doesn’t boot

– Serial clock line failure

– Serial data line failure

– External RAM fault

– Algorithm file or alias ID don’t find

– MCU flash Vpp error

PAMS

Technical Documentation NSB–1/3

Troubleshooting Instructions

Page 5

Original 06/98

In cases that the flash programming doesn’t succeed there is a possibility

to check short circuits between the memories and the MCU (MAD2).

This test is useful to do, when the fault information is: MCU doesn’t boot,

Serial clock line failure or Serial data line failure.

The test procedure is following:

1. Connect the short circuit wire between the test points J206 and J207.

2. Switch power on

3. If the voltage level in testpoint J205 is 2.8 V (”1”), the interface is OK. If

there is a short circuit, the voltage level in testpoint J205 stays low and

32kHz square wave signal can be seen in the lines which are already

tested.

This test can only be used to find short circuits, not open pins. Also upper

data lines (15:8) of flash circuit D210 are not included to this test.

CCONT pin 54( PURX )

MAD pin 38 ( MCUAD0)

MAD pin 134 ( ExtSysResX))selftest

passed J205

PAMS

Technical Documentation

NSB–1/3

Troubleshooting Instructions

Page 6 Original 06/98

Flash Programming (1)

Flash programming doesn’t work

EEPROM (D230) pin8 (VBB) 2.8V

VVCXO 2.8V (G703, C721) NO

See section: Phone is totally dead

YES

J121 (Purx)=”1” (2.8V) NO Sleep clock (SCLK) J201

square wave 32 kHz NO

YES

Faulty circuit N100

or over loaded PurX line

check sleep

clock circuitry

(B150,R197...)

YES

MAD2 pin 93 (J200): 13MHz sine wave

clock signal: 500 mVpp min.

YES

Check that following lines are correct from X131 to D200:

YES

If the fault information from the prommer is:

b) serial data line failure

a) MCU doesn’t boot

c) serial clock line failure

connect:

FBUS_TX: X131 pin13 –> D200 pin104

FBUS_RX: X131 pin12 –> D200 pin109

check also pullup and pulldown resistors: R200, R201, R123

GND : X131 pin 9 –> GND

connect watchdog disable (J114) to GND (J113)

Enable the selftest function of D200 by connecting

shortcircuit between testpoints J206 and J207

Connect an oscilloscope to testpoint J205 and switch

power on

Voltage level rises to ”1” after power on at testpoint J205 NO

YES

There is a shortcircuit

somewhere in memory control

lines or MCU address lines or

MCU lower (7:0) data lines

There could be open pins in circuits D200 (D211, D240)

If not, the PCB or D200 (D221, D210) is faulty

WDDIS line –> N100 pin29

check

Check

Fault finding chart

for 13 MHz

oscillator

MBUS: X131 pin11 –> D200 pin112

PAMS

Technical Documentation NSB–1/3

Troubleshooting Instructions

Page 7

Original 06/98

Flash Programming failure (2)

Flash progrmming doesn’t work

YES

If the fault information from the prommer is:

External RAM fault

YES

Check pins of SRAM (D221)

Check control lines of SRAM:

RAMSelX ... Flash progrmming doesn’t work

YES

If the fault information from the prommer is:

Algorithm file or alias ID don’t find, ID is un-

known etc.

YES

Check control lines and upper data lines (15:8)

of FLASH: ROM1SelX...

Check pins of FLASH (D210)

Flash progrmming doesn’t work

YES

If the fault information from the prommer is:

MCU flash Vpp error

D210 pin13 (C211)

Vpp=2.8V

Faulty component

D210 or C211

YES

Check UI connector X99

and zero ohm resistor

Check output of regulator

N200 pin4 2.8V

Faulty component N200

or C213, C212

Check V8

N200 pin6

YES

Check V109,

C124, C148

Faulty

component

N100

PAMS

Technical Documentation

NSB–1/3

Troubleshooting Instructions

Page 8 Original 06/98

Power doesn’t stay on, or phone is jammed

If this kind of fault has come after flash programming, there are most

probably open pins in ICs.

The soldered joints of ICs: D200 (MAD2), D210 (FLASH), N100

(CCONT), D221 (SRAM) are useful to check at first.

Normally the power will be switched of by CCONT (N100) after 30 se-

conds, if the watchdog of the CCONT can not be served by software.

The watchdog updating can be seen by oscilloscope at pin 50 (DataselX)

of CCONT.

In normal case there is a short pulse from ”1” –> 0 every 8 seconds.

The power off function of CCONT can be prevented by connecting a short

circuit wire from CCONT pin 29 to ground.

Power doesn’t stay on or phone is jammed

EEPROM (D230) pin8 (VBB) 2.8V

VVCXO 2.8V (CCONT pin25 –> G703) NO

YES

J121 (PURX) = ”1” (2.8V) NO J201 sleepclk (SLCLK)

square wave 32 kHz NO

YES

Faulty circuit N100

or over loaded PurX line

check sleep

clock circuitry

YES

MAD2 (D200) pin 93: 13 MHz sine wave

clock signal: 500 mVpp min.

YES

Connect watchdog (WWDDIS) to GND (J113,J114)

N100 is faulty

VBAT is correct

3.6 V

YES

CCONT watchdog is served?

(pin 50 pulses 1 –> 0)

YES

software is able to run

check UI module

after few seconds, check

BSI and BTEMP lines

If power is switched off

Open pins or faulty circuit:

D200, D210, D221, N100

(B150, R197...)

Check:

Fault finding chart for

13MHz oscillator

PAMS

Technical Documentation NSB–1/3

Troubleshooting Instructions

Page 9

Original 06/98

Display Information: Contact Service

This fault means that software is able to run and thus the watchdog of

CCONT (N100) can be served.

Selftest functions are run when power is switched on and software is

started to excute from flash.

If any of selftests failed, contact service information will be shown on dis-

play.

The phone doesn’t register to the network or phone

doesn’t make a call

f the phone doesn’t register to the network or the phone doesn’t make a

call, the reason could be either the baseband or the RF part.

The phone can be set to wanted mode by WinTesla service software and

determinate if the fault is in RF or in baseband part (RF interface mea-

surements).

The control lines for RF part are supplied both the System Asic

(MAD2;D200) and the RFI (Cobba; N300). MAD2 handles digital control

lines ( like synthe, TxP etc.) and Cobba handles analog control lines (like

AFC, TxC etc.).

The DSP software is constructed so that operation states of DSP (MAD2)

can be seen in external flag (DSPXF) output pin (D200 pin 91).

MAD2 pin 91 (DSPXF)

1 2 3

1. DSP initialization done

2.Synchronization to network

done

3. Registrarition to network

done.

J222

PAMS

Technical Documentation

NSB–1/3

Troubleshooting Instructions

Page 10 Original 06/98

MAD2 pin 91 (DSPXF)

J222

MAD2 pin 91 (DSPXF)

J222

MAD2 pin 91 (DSPXF)

J222

init

initialize patch code

download

dsp

constants

download

initialization

done

synchronization

channel

scan starts

PSW

search last PSW

send RACH

RACH OK

go SDCCH

imediate assigment

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