Nokia 7280 Service Manual 06(a) RM14 bb trouble

Nokia Customer Care

6(a) - Baseband

6(a) - Baseband Troubleshooting and Manual Tuning

Troubleshooting

RM-14

Nokia Customer Care Baseband Troubleshooting and Manual Tuning

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2 COMPANY CONFIDENTIAL ISSUE 1 11/04

RM-14 Baseband Troubleshooting and Manual Tuning Nokia Customer Care

Table of Contents

Page No

Introduction .........................................................................................................5

General Failures.................................................................................................. 6

Phone is dead.................................................................................................... 6

Low battery operation time................................................................................. 8

Flash programming does not work..................................................................... 9

Charging failure................................................................................................ 10

Phone does not stay on, or phone is jammed.................................................. 11

Display information: “Contact Service”............................................................. 12

Function Failures ..............................................................................................14

Camera failure ................................................................................................. 14

Viewfinder working but no picture taken when pressing select-key ............... 16

FM-radio failure................................................................................................ 17

Infrared communication failure......................................................................... 18

SIM failure........................................................................................................ 19

Bluetooth failure............................................................................................... 20

Display failure .................................................................................................. 21

Audio failure..................................................................................................... 22

Uplink or downlink failure ...............................................................................22

Uplink missing audio signal ............................................................................23

Uplink weak audio signal ............................................................................... 24

Uplink distorted audio signal .......................................................................... 25

Uplink TDMA noise ........................................................................................26

Downlink missing audio signal .......................................................................27

Downlink weak audio signal ...........................................................................28

Downlink distorted audio signal ..................................................................... 29

Downlink noise in audio signal .......................................................................30

Downlink TDMA noise ....................................................................................31

Various noise problems ................................................................................. 32

BT audio errors ..............................................................................................33

Vibra errors ....................................................................................................34

Key failure........................................................................................................ 35

Power key failure ...........................................................................................35

UI module keys working .................................................................................36

Service Tool Concept for RM-14 Baseband Tunings..................................... 37

Service concept for RM-14 baseband tunings................................................. 38

Baseband Tunings ............................................................................................40

Energy management tuning............................................................................. 40

List of Figures

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RM-14

Nokia Customer Care Baseband Troubleshooting and Manual Tuning

Page No

Fig 1 Phone is dead..............................................................................................8

Fig 2 Low battery................................................................................................... 9

Fig 3 Flash programming does not work............................................................... 10

Fig 4 Troubleshooting charging............................................................................. 11

Fig 5 Phone does not stay on, or is jammed......................................................... 12

Fig 6 Display information: “Contact Service”......................................................... 14

Fig 7 No picture..................................................................................................... 15

Fig 8 No picture 2.................................................................................................. 16

Fig 9 Viewfinder working but no picture taken when pressing select-key............. 17

Fig 10 Infrared communication failure................................................................... 19

Fig 11 SIM failure..................................................................................................20

Fig 12 Display failure............................................................................................. 22

Fig 13 Uplink or downlink failure ........................................................................... 23

Fig 14 Uplink missing audio signal........................................................................ 24

Fig 15 Uplink weak audio signal............................................................................ 25

Fig 16 Uplink distorted audio signal ......................................................................26

Fig 17 Uplink TDMA noise .................................................................................... 27

Fig 18 Downlink missing audio signal ...................................................................28

Fig 19 Downlink weak audio signal.......................................................................29

Fig 20 Downlink distorted audio signal.................................................................. 30

Fig 21 Downlink noise in audio signal...................................................................31

Fig 22 Downlink TDMA noise................................................................................ 32

Fig 23 Various noise problems.............................................................................. 33

Fig 24 BT audio errors ..........................................................................................34

Fig 25 Vibra errors ................................................................................................35

Fig 26 Power key failure........................................................................................36

Fig 27 UI module keys working.............................................................................37

4 COMPANY CONFIDENTIAL ISSUE 1 11/04

RM-14 Baseband Troubleshooting and Manual Tuning Nokia Customer Care

Introduction

This document describes in overview the different hardware error possibilities for the RM-14 phone.

Not every possible hardware error is described in this document, but only those possible to correct.

Note! Most components are under shielding and therefore not changeable.

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RM-14

Nokia Customer Care Baseband Troubleshooting and Manual Tuning

General Failures

■ Phone is dead

The phone doesn’t use any current at all when the supply is connected and/or power key is pressed. It is assumed that the voltage supplied is 3,9Vdc. UEME will prevent any functionality at battery/supply levels below 2,9Vdc and the software will shut the phone down at 3,1Vdc.

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RM-14 Baseband Troubleshooting and Manual Tuning Nokia Customer Care

Figure 1:Phone is dead

Phone is dead

Yes

Phone shortcircuit DC power

Check RF-PA

Yes

Check SIM Switch

Check VBATT on C104 ~3.9V

Measure voltages on both sides

of pin 12 of x1200 when power key is pressed. Should be ~0V.

Yes

Measure voltage on L260, L261, L262, L263, L264, L265 and L206.

Should be ~3.9V.

Sleep clock on J401:~32,768kHz, 1,8Vpp

Measure voltage on PURX=1.8Vdc onJ404 or N6031 ~1sec after power key is pressed

Yes

Measure voltage on VR3=2,78Vdc on C295pin1

Yes

Verify that system clock is @~26MHz,

min 300mVACpp on C422 pin2 towards

D400(TIKU) with regular probe Cin ~10

-13pF/10M

Nok

Replace SIMgate

Check UI flex and PWB

Failure in VBAT line: Check X100, L260, L261, L262 L263, L264, L265, L206, C260 C261, C262, C283 and PWB

Check B200, C209,C210, D200 and PWB

Check D200 and PWB

Check D200, C295 and PWB

Check C422, R420, N500 (Helgo), G501 (26MHzXTAL) and PWB

Yes

Note! The boxes marked with *) are not serviceable parts.

Check D400 (TIKU) and D401

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The boxes inside the blue lines are not changeable or measurable!

RM-14

Nokia Customer Care Baseband Troubleshooting and Manual Tuning

■ Low battery operation time

Figure 2:Low battery

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RM-14

Baseband Troubleshooting and Manual Tuning Nokia Customer Care

■ Flash programming does not work

The flash programming on RM-14 boards is possible via the pads on the PWB and through the SIM slide.

In flash programming error cases the flash prommer (via Phoenix or Darium) can give some information about the fault. The fault information messages could be:

• Phone doesn't set Flashbus TXD line high after VCC is switch on.

• External RAM test failed.

These errors are some of the most common errors and based on this, a fault finding diagram for flash programming is shown below. Various errors can appear from the prommer when flashing the phone - not all of them can be directly linked to the HW or phone.

Because of the use of uBGA components, it is not possible to verify on the dia gram, if there is a short circuit in control and address/data lines on TIKUEDGE, NOR flash, NAND flash or SDRAM.

Figure 3:Flash programming does not work

Re-solder \ Replace componet

)

Fix the connections if possible. Else scarp the phone.

scrap

Note!

The boxes marked with *) are not serviceable parts!

Note! The boxes inside the blue lines are not changeable or measurable!

Check SDRAM orientation and placement. Placement OK ?

Check PWB (if possible) and power lines. Connecti ons OK ?

Flash programming does not work

Prommer information is: External RAM test failed. (C108)

Yes

Flash again

Yes

Replace the SDRAM

Prommer information is:

does

Phone dose not set Flashbus TXD line hi gh after VCC is switched on.

Yes

J39

Check J386 - resistor R397/R396 Connecti ons ok ?

Try reading MCU ID with Phoenix Reading OK ?

Try reading flash ID with Phoenix Reading OK ?

Yes

Flash again

Re-solder \ Replace componet

Replace UEME or TIKU

Replace NOR or NAND flash

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RM-14

Nokia Customer Care Baseband Troubleshooting and Manual Tuning

■ Charging failure

Figure 4:Troubleshooting charging

Charging fails and no current

drawn from 'charger'

Yes

Measure Vchar voltage on V101.

Is it > 3,0V?

Yes

Recalibrate charger circuitry and

retest. Did it work ?

Yes

END

Display information when charger

connected: "Not charging"

*) is SIM holder inserted?

Check system connector

X101, F100, C121, V101, C102,

Swap the phone,

Check:

X1200

C103 and PWB

D200 (UEME) is faultyNO

C107

Yes

Recalibrate charger circuitry and

retest. Did it work ?

BTEMP=~68Ohm @roomtemperat-

Verify through Phoenix that BSI =

ure (~25)

~75kOhm (BL-5C) and BTEMP =

~47kOhm @ roomtemperature

(~25C)

Yes

Measure voltage on R200 towards

D200. Should be the same as

Vbat voltage

Yes

Phone should work. If not change

whole engine board

ENDYes

Check:

BSI: Battery (BL-5C), C100, R203,

BSI: R102, C100, R203, Q104, pwb, SIM SW, R203 and R206

BTEMP: R100, C101, R202, pwb

BTEMP:R100. C101, R202, pwb and R207

Check:

pwb and R206

and R207

Note! The boxes marked with *) are not serviceable parts!

R200, D200 (UEME) and pwb

The boxes inside the blue lines are not changeable or measurable!

Check:

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RM-14 Baseband Troubleshooting and Manual Tuning Nokia Customer Care

■ Phone does not stay on, or phone is jammed

If the MCU doesn’t service the watchdog register within the UEME, the operations watchdog will run out after approximately 32 seconds. It is not possible to measure this service routine.

Figure 5:Phone does not stay on, or is jammed

Phone does not stay on or is jammed

Yes

Verify that system clock is @ ~26MHz, min300mVaCpp on C422 pin2 towards D400 (TIKU) with regular probe Cin~10-13pF/ 10M

Yes

Measure voltage on PURX=

1.8Vdc on N6031 ~1sec after the power key is pressed.

Yes

UI functionality and keys react to pressure

Yes

Can extraction of SIM holder switch off the phone.

Check C422, R420, N500 (Helgo), G501 (26MHzXTAL) and PWB.

Swap the phone

Check Z300, UI board, keymat, lightguide, and PWB.

Yes

Is everything working until phone shuts down after ~32sec

Replace SIM gate

ISSUE 1 11/04 COMPANY CONFIDENTIAL 11

Retest and if phone still doesn’t work change whole engine board.

Yes

Swap the phone

Note!

The boxes inside the blue lines are not changeable or measurable!

RM-14

Nokia Customer Care Baseband Troubleshooting and Manual Tuning

■ Display information: “Contact Service”

When this error appears in the display it means that one or more of the internal baseband test s has failed. The baseband tests (self tests) are performed each time the phone is powered on. The self tests are divided into those performed while powering up (S t art up tests) and the ones that can be executed with a PC using Phoenix (Runtime tests). The following S tart-up tests are performed during power up:

UEM CBUS IF TEST SLEEP X LOOP TEST AUX DA LOOP TEST EAR DATA LOOP TEST TX IDP LOOP TEST TX IQ DP LOOP TEST SIM CLK LOOP TEST SIM IO CTRL LOOP TEST MBUS RX TX LOOP TEST BACKUP BATT TEST RADIO TEST WARRANTY TEST PA TEMP TEST SIM LOCK TEST PPM VALIDITY TEST KEYBOARD STUCK TEST LPRF IF TEST FLASH CHECKSUM TEST CAMERA IF TEST EXT RAM DATA BUS TEST EXT RAM ADDR BUS TEST NAND FLASH ID TEST BT WAKEUP TEST IR IF_TEST

If all these self tests are passed, the phone will start up. From Phoenix it’s possible to run all the self tests and the additional “Runtime test”. The test

cases can be seen below.

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RM-14 Baseband Troubleshooting and Manual Tuning Nokia Customer Care

Figure 6:Display information: “Contact Service”

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