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CCS Technical Documentation RH-12/RH-28 Series Transceivers

6(a) - Baseband Troubleshooting Instructions

Issue 1 02/04

Nokia Corporation

RH-12/RH-28 Baseband Troubleshooting Instructions

CCS Technical Documentation

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CCS Technical Documentation Table of Contents

RH-12/RH-28 Baseband Troubleshooting Instructions

Page No Introduction.................................................................................................................... 5 General Failures ............................................................................................................. 6 Phone is dead ...............................................................................................................6 Flash programming doesn't work ................................................................................7 Charging Failure ..........................................................................................................8 Phone doesn't stay on, or phone is jammed ................................................................9 Display Information: "Contact Service" ....................................................................10 Function Failures.......................................................................................................... 12 Camera Failure ...........................................................................................................12 No picture................................................................................................................ 12 Viewfinder working but no picture taken when pressing select-key ...................... 14 FM-radio Failure ........................................................................................................15 Infrared Communication Failure ...............................................................................16 SIM Failure ................................................................................................................17 MMC Failure .............................................................................................................18 Bluetooth Failure .......................................................................................................19 Display Failure ...........................................................................................................20 USB Data Transmission Failure ................................................................................21 Functional Cover Failure ...........................................................................................22 Audio Failure .............................................................................................................24 Uplink or downlink failure...................................................................................... 24 Uplink missing audio signal.................................................................................... 25 Uplink weak audio signal........................................................................................ 26 Uplink distorted audio signal .................................................................................. 27 Uplink TDMA noise................................................................................................ 28 Downlink missing audio signal ............................................................................... 29 Downlink weak audio signal ................................................................................... 30 Downlink distorted audio signal ............................................................................. 31 Downlink noise in audio signal............................................................................... 32 Downlink TDMA noise........................................................................................... 33 Various noise problems........................................................................................... 34 BT audio errors........................................................................................................ 35 Vibra errors ............................................................................................................. 36 BackLight Failure ......................................................................................................37 Key Failure ................................................................................................................38 Power Key Failure................................................................................................... 38 Volume Key Failure ................................................................................................ 39 Keypad Failure ........................................................................................................ 40

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RH-12/RH-28 Baseband Troubleshooting Instructions

CCS Technical Documentation

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RH-12/RH-28 Baseband Troubleshooting Instructions

Introduction
This document describes in overview the different hardware error possibilities for the RH-12/RH-28 phone. Not every possible hardware error is described in this document, but only those possible to correct.

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General Failures
Phone is dead
This means that the phone doesn't use any current at all when 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.
Figure 1: Phone is dead
Phone is dead Yes Measure voltage on L260, L261, L262, L263, L264, L265 and L206. Should be ~3,9V Yes Measure voltages on both sides of R302 when power key is pressed. Should be ~0V. Yes Sleep clock on J401: ~32,768kHz, 1,8Vpp Yes Measure voltage on PURX = 1,8Vdc on J404 or N131 pin 3 ~1sec after power key is pressed. Yes Measure voltage on VR3=2,78Vdc on C295 pin1 Yes Verify that system clock is @ ~26MHz, min 300mVACpp on C422 pin2 towards D400 (TIKU) with regular probe Cin ~10-13pF / 10M Yes Check: D400 (TIKU) and D450, D451 (Flashes) and D455 SDRAM Check: C422, R420, C514, C515, L515, N500 (Helgo), G501 (26MHZ XTAL) and pwb. Check: D200, C295 and pwb Check: D200 and pwb NO Check: B200, C209, C210, D200 and PWB Check: R302, S323 (power key) and pwb Failure in VBAT line: Check X100, L260, L261, L262, L263, L264, L265, L206, C260, C261, C262, C283 and pwb

NO

NO

NO

NO

NO

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RH-12/RH-28 Baseband Troubleshooting Instructions

Flash programming doesn't work
The flash programming on RH-12/RH-28 boards is only possible via the pads on the PWB. In case of Flash failure in production (FLALI station), problem is most likely related to SMD problems. Possible failures could be Short-circuiting of balls under µBGAs (e.g. UEME, TIKUEDGE, SDRAM, FLASH), missing or misaligned components. 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 diagram, if there is a short circuit in control and address/data lines on TIKUEDGE, NOR flash, NAND flash or SDRAM.
Figure 2: Flash programming does not work
Flash programming does not work

Prommer information is: External RAM test failed. (C108) Yes No Check SDRAM orientation and placement. Placement OK ? Yes Fix the connections if possible. Else scarp the phone. No Check PWB (if possible) and power lines. Connections OK ? Yes Replace the SDRAM

Prommer information is: Phone dose not set Flashbus TXD line high after VCC is switched on. Yes Check J386 - resistor R397/R396 Connections ok ? Yes Try reading MCU ID with Phoenix Reading OK ? Yes Try reading flash ID with Phoenix Reading OK ? Yes Flash again No No No

Re-solder \ Replace componet

Re-solder \ Replace componet

Replace UEME or TIKU

Replace NOR or NAND flash

Yes Flash again

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Charging Failure
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 NO D200 (UEME) is faulty Check: X101, F100, C121, V101, C102, C103 and PWB

NO

Display information when charger connected: "Not charging" Yes Recalibrate charger circuitry and retest. Did it work ? No Verify through Phoenix that BSI = ~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 Check: R200, D200 (UEME) and pwb Check: BSI: Battery (BL-5C), C100, R203, pwb and R206 BTEMP: R100, C101, R202, pwb and R207

Yes

END

No

No

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RH-12/RH-28 Baseband Troubleshooting Instructions

Phone doesn't stay on, or phone is jammed
If this kind of a failure is presenting itself immediately after FLALI, it is most likely caused by ASICs missing contact with PWB. 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 3: Phone doesn't stay on, or is jammed

Phone doesn't stay on or phone is jammed Yes Sleep clock on J401: ~32,768kHz, 1,8Vpp Yes Verify that system clock is @ ~26MHz, min 300mVACpp on C422 pin2 towards D400 (TIKU) with regular probe Cin ~10-13pF / 10M Yes Measure voltage on PURX = 1,8Vdc on J404 or N131 pin 3 ~1sec after power key is pressed. Yes UI functionality and keys react to pressure Yes Is everything working until phone shuts down after ~32sec No Retest and if phone still doesn't work change whole engine board. Check: D400, D450, D451, Z300, Z301, UI-board, keymat, lightguide and pwb. Check: D200 and pwb Check: C422, R420, C514, C515, L515, N500 (Helgo), G501 (26MHZ XTAL) and pwb. NO Check: B200, C209, C210, D200 and PWB

NO

NO

NO

Yes

Change D200 (UEME)

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Display Information: "Contact Service"
When this error appears in the display it means that one or more of the internal baseband tests 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 (Start up tests) and the ones that can be executed with a PC using Phoenix (Runtime tests). The following Start-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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Figure 4: Display Information: "Contact Service"

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Function Failures
Camera Failure
No picture

No picture

Module placed correctly?

No

Remove module

Broken springs etc. in X900?

No

Reposition module

Yes

Yes Change X900

1.8V present at Z901?

No

Check for short circuit of C903, C902 or C291

Short circuits?

No

UEME or PWB FAILURE

Yes

Yes Replace component

2.7V present at Z900?

No

Check for short circuit of C901, C900 or C289

Short circuits?

No

UEME or PWB FAILURE

Yes

Yes Replace component

26 Mhz clock present at R900? Yes

No

Check for short circuit of R900 or R904

Short circuits?

No

PWB or TIKU FAILURE

Yes Replace component

1.8V present at C904

No

Check for short circuit of C904

Short circuit?

No

PWB or TIKU FAILURE

Yes

Yes Replace component

Continue on next page

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Data present at R913?

No

Check for short circuit of R913

Short circuits

No

CAMERA or PWB FAILURE

Yes

Yes Replace component

Clock present at R906

No

Check for short circuit of R906

Short circuit?

No

CAMERA or PWB FAILURE

Yes

Yes Replace component

Clock present at R902?

No

Check for short circuit of R902

Short circuit?

No

TIKU or PWB FAILURE

Yes

Yes Replace component

Data present at R901?

No

Check for short circuit of R901

Short circuit?

No

TIKU or PWB FAILURE

Yes Replace component

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RH-12/RH-28 Baseband Troubleshooting Instructions

CCS Technical Documentation

Viewfinder working but no picture taken when pressing select-key

Viewfinder working but no picture taken when pressing select-key

Select key functional?

No

Check keyboard with Phoenix

X300 and X301 OK?

No

Replace component

Yes Yes UI- or main PWB FAILURE

R906 = 104MHz clock when pressing select?

No

Check for short circuit of R906

Short circuit?

No

CAMERA FAILURE

Yes

Yes Replace component

Reflash phone

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RH-12/RH-28 Baseband Troubleshooting Instructions

FM-radio Failure
The FM-radio troubleshooting guide is placed in the RF section.

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Infrared Communication Failure

IrDA Failure Yes

Measure VBAT at C350 = 3,74,2V ? Yes

No Defect PWB

Measure VFLASH1 at C351=2,78V

No

Replace D200

Yes

Measure VIO at C353=1,80V

No

Replace D200

Yes

Measure activity TXD on N350 pin3 ?

No

Replace D400

Yes Replace N350

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RH-12/RH-28 Baseband Troubleshooting Instructions

SIM Failure
The hardware of the SIM interface from the UEME (D200) to the SIM connector (X386) can be tested without a SIM card. When the power is switched on, the phone first checks 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". The error "SIM card rejected" means that the ATR message received from the 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.
Figure 5: SIM Failure

SIM Fault

Is used sim a 3,0V or 1,8V card ? Yes

No

Replace used test sim-card

Measure VSIM at X386. Is it 3V or 1,8V?

No

Check SIM reader X386

Measure VSIM at C390. Is it 3V? Yes

No

UEME FAILURE

Yes Check SIM power-up sequence (picture of 3V sim card) Should be as picture

Is not as picture

Replace R388

VSIM

Reset

Clock

Data

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MMC Failure
The hardware of the MMC interface from the UEME (D200) to the MMC connector (X910) can't be tested without a MMC card. To be able to measure the following, solder wires on respective points.
Figure 6: MMC Failure

MMC Fault Yes

Measure VBATBB at C911 = 3,74,2V ?

No

Defect PWB

Yes

The following points can be measured at phone powerup, since the MMC will be initialized here.

Measure VMMC at C913=2,85 V Yes

No

Replace N910

Measure VMMC at X910 pin4 =2,85V Yes

No

Resolder X910

Measure MMC_CMD & MMC_CLK activity on X910 pin 2&5

No

Replace R910

Yes Reflash phone

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RH-12/RH-28 Baseband Troubleshooting Instructions

Bluetooth Failure
The Bluetooth troubleshooting guide is placed in the RF section. When the flash D450 or UEME has been replaced the IMEI has to be reprogrammed. This will automatically include reprogramming of the BT address.

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RH-12/RH-28 Baseband Troubleshooting Instructions

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Display Failure
Display fails Yes Is display working NO Change display module

Is display working? Yes

NO

Measure Vflash1 @ L302 towards X302 (display connector). Should be ~2,78Vdc Yes Measure VIO @ L301 towards X302 (display connector). Should be ~1,8Vdc

NO

Check: X302, C311, L302, C310, D200 (UEME) and PWB

NO

Check: X302, C309, L301, C308, R307, D200 (UEME) and PWB

Yes

Yes Are LED's working? Measure Vout on C304 = ~13,5V Yes Measure RESX on X302 - pin 24. Should be ~1,8V. Yes Phone should work. If not change engine board. Check: D400 (TIKU) and pwb Check: N300, C304, R308, R312, R306, X302, R305, X300, pwb and UI board

NO

NO

End

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USB Data Transmission Failure
USB failing

Attach phone via DKU-2 cable. Display shows: 'Data enhancement connected' ?

Yes

USB host detected. Retest USB interface

No

Measure Vbus @ C109 Is it ~5 V?

No

Check Pop Port X102 (soldering joints & spring contacts) or Z101, R106 & R108 Retest USB interface

Yes

Measure startup sequence for: Vbus,D+,D- @ C109,J105,J106 Compare to screenshot

Similar startup sequence

Check USB2 ASIP R107,Z101,R106,R108 Retest USB interface

Fail

Ch.1: D+, Ch.2: D-, Ch.3: Vbus

Measure startup sequence for: Vbus,D+,D- @ C109,J110,J109 (1,8 V logic levels) Compare to screenshot

Similar startup sequence

Change NUT N100. Retest USB interface

Fail

Change TikuEdge

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Functional Cover Failure
FCI failing

Fail

Attach FC to phone. Open CCS Phoenix tool. Run 'alive' test

Okay

FCI is working. Retest phone

Fail

Check 'Padextender' (Solder joints and spring contacts). Is it okay?

No

Change the 'padextender'. Retest interface

Yes

Attach FC to phone. Measure Vout Is it ~Vbat ?

No

Change L304,C320. Is it working now?

Yes

Retest interface

No

Change Z310. Is it working now?

Yes

Retest interface

Yes No

TikuEdge interface failing.

Goto FCI failing page 2

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FCI failing page 2

Attach FC to phone. Measure SCL & SDA Can any activity be seen?

No

Change L305,L306. Is it working now?

Yes

Retest interface

No

Change Z310. Is it working now?

Yes

Retest interface

Yes

No

TikuEdge interface failing.

Attach FC to phone. Measure Int High to low transition?

No

Change L307. Is it working now?

Yes

Retest interface

No

Yes

Change Z310. Is it working now?

Yes

Retest interface

No

TikuEdge interface failing.

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RH-12/RH-28 Baseband Troubleshooting Instructions

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Audio Failure
Uplink or downlink failure

Start

uplink

Is problem uplink or downlink

downlink

Is there an audio signal?

No

Go to "Uplink missing audio signal"

Is there an audio signal?

No

Go to "Downlink audio signal missing"

Yes Yes Is audio level sufficient? No Go to "Uplink weak audio signal Is audio level sufficient? Yes Yes Is audio signal undistorted? Go to "Uplink distorted audio signal" Is audio signal undistorted? Yes Yes Is TDMA noise inaudible No Is audio signal free of noise No Go to "Downlink audio signal noise" No Go to "Downlink audio signal distorted" No Go to "Downlink audio signal weak"

No

Go to "Uplink TDMA noise"

Yes

Yes

Is there no acoustical feedback

No

Go to "Acoustical feedback"

Is TDMA noise inaudible

No

Go to "Downlink TDMA noise"

Yes Go to "Acoustical feedback"

Is there no acoustical feedback Yes

No

No Click noise, audio signal too loud or bad picture/ sound synchronization Software error or bad TIKU

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RH-12/RH-28 Baseband Troubleshooting Instructions

Start

Is mute deactivated?

No

Deactive mute in menu

No

Is problem present both with hand portable and accessory?

Yes

Is problem solved when using accessory?

No

Accessory is defective

Yes No Are any of the bias components defective ? (check R153, C151 and R151 for hand portable and R156, C158, R166, C159 and L152 for accessory) No Replace UEME

Measure mic. bias. Is it close to 2.1 V ?

Yes

Replace defective parts. Is bias close to 2.1 V ?

No

Yes

Are microphone contacts and PWB pads ok ?

No

Clean contacts and pads

Yes Replace microphone

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RH-12/RH-28 Baseband Troubleshooting Instructions Uplink weak audio signal

CCS Technical Documentation

Start

Is microphone opening clean?

No Clean opening

Yes

Measure bias. Is it close to 2.1V?

No

Are any of the bias components defective (check R153, C151 and R151)

No

Replace UEME

Yes

Yes

Replace defective parts. Is bias close to 2.1 V

No

Yes

Are microphone contacts and PWB pads ok?

No

Clean contacts and pads. If tracks are badly corroded it may not be possible to repair phone

Yes

Are any of the components L151, C165, R155, R162 or R157 missing or damaged?

Replace microphone

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CCS Technical Documentation Uplink distorted audio signal

RH-12/RH-28 Baseband Troubleshooting Instructions

Start

Is there no distortion when using accessory?

No Defect accessory

Yes

Measure bias. Is it close to 2.1V? Yes

No

Are any of the bias components defective (check R153, C151 and R151)

No

Replace UEME

Replace defective parts. Is bias close to 2.1 V

No

Yes

Are microphone contacts and PWB pads ok

No

Clean contacts and pads. If tracks are badly corroded it may not be possible to repair phone

Yes

Replace microphone

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RH-12/RH-28 Baseband Troubleshooting Instructions Uplink TDMA noise

CCS Technical Documentation

Start

Is there TDMA noise both in hand portable and when using accessory?

No

Is there only noise in hand portable mode?

No

Defective accessory

Yes

Yes

Replace microphone. Is there still noise?

No

Defective microphone

Yes

Check for loose, missing or damaged shielding cans

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CCS Technical Documentation Downlink missing audio signal

RH-12/RH-28 Baseband Troubleshooting Instructions

Start

Is problem present both in hand portable mode and when using FM radio/music player/ MIDI?

No

Is problem associated with FM radio or music player/ MIDI? FM radio

Music player/MIDI Defective music file

Yes

Is external antenna working? Is problem present both in earpiece, IHF and with accessory? No Yes

No

Accessory is not detected or is defective

FM module is defective

Yes Is problem related to earpiece, IHF or accessory? IHF IHF is defective. Check IHF speaker and connections. Check L155, L156 and C162. Check UEME. Earpiece is defective. Check IHF speaker and connections. Check L155, L156 and C162. Check UEME.

Earpiec e

Accessory

Accessory is defective

Software or UEME is defective

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RH-12/RH-28 Baseband Troubleshooting Instructions Downlink weak audio signal

CCS Technical Documentation

Start

Is IHF opening clogged? Is problem present both in earpiece and IHF? No No

Yes

Clean IHF opening

Yes

Is problem related to earpiece or IHF?

IHF

IHF is defective. Check IHF speaker and connections. Check UEME.

Earpiec e Is IHF opening clogged? No Earpiece is defective. Check earpiece speaker and connections. Check UEME. Yes Clean earpiece opening

Software or UEME is defective

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CCS Technical Documentation Downlink distorted audio signal

RH-12/RH-28 Baseband Troubleshooting Instructions

Start

Is problem present both in earpiece and IHF?

No

Yes

Is problem related to earpiece or IHF?

IHF

IHF is defective. Check IHF speaker and connections. Check UEME.

Earpiec e

Earpiece is defective. Check earpiece speaker and connections. Check UEME.

Software error. Bad music files. Defective FM module. Defective UEME

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RH-12/RH-28 Baseband Troubleshooting Instructions Downlink noise in audio signal

CCS Technical Documentation

Start

Is noise electrical or mechanical?

Mechanical

Loose speaker or other component inside telephone

Electrical

Defective speaker. No

Is noise associated with earpiece/IHF (hand portable mode)?

Yes

Does error occur both in earpiece and IHF?

No

Yes

Software error. Defective or badly tuned antenna.

Is noise associated with FM tuner or with Music Player?

Music Player Bad music file

FM radio

Is noise associated with accessory?

No Defective FM module

Yes

Defective accessory. Repair or Replace accessory

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RH-12/RH-28 Baseband Troubleshooting Instructions

Start

Is there TDMA noise both in hand portable and when using accessory?

No

Is there only noise in hand portable mode?

No

Defective accessory

Yes

Yes

Replace battery. Is there still noise?

No

Defective battery.

Yes

Check for loose, missing or damaged shielding cans. Mistuned antenna. Missing/bad components. Check that problem is not related to uplink TDMA noise.

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RH-12/RH-28 Baseband Troubleshooting Instructions Various noise problems

CCS Technical Documentation

Start

Sound level too loud? No

Yes

Software error

Click noise

Yes

Software error

No

Picture/sound synchronisation

Yes Bad TIKU

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RH-12/RH-28 Baseband Troubleshooting Instructions

Start

Accessory working?

No

Replace or repair accessory

Yes

Software working?

No

Flash with new software

Yes

Defective BT module or antenna. Defective TIKU

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RH-12/RH-28 Baseband Troubleshooting Instructions Vibra errors

CCS Technical Documentation

Start

Is there any vibration?

No

Yes

Wrong setting or software error. Contact problem. Mechanical problem - counterweight is blocked Defective or missing vibra. Defective UEME.

Is there sufficient vibration? Yes

No

Software error Contact problem. Defective vibra. Defective UEME.

Vibra is constantly switched on? No

Yes

Software error. Defective UEME. Short circuit.

Intermittent vibration?

Yes

Bad connection. Defective vibra.

No Acoustical noise? Yes

Defective vibra. Mechanical problem - counterweight hits D-cover/PWB. Loose parts in phone.

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BackLight Failure

Start

Are the display LED's working?

Try to change display. Are the LED's working now?

No

Retest failed display

Yes

Check X302 (Solder joints). Is it OK?

No

Change X302

Yes

Yes

Measure VLED+ ~ 13.5V when the LED driver is enabled. Is this OK?

No

Check N300, L303, C304, C304, R308. If not OK, Change defect part.

Are the keyboard LED's working?

No

Change UI PWB. Are the LED's working now?

No

Retest the failed UI PWB

Yes

Check X301 (Solder joints). Is it OK?

No

Change X301

Yes

Yes

Measure VLED+ ~ 8V when the LED driver is enabled. Is this OK?

No

Check R304, R303 & all LED's on UI PWB. If not OK, Change defect part.

Yes

End

Retest

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Key Failure
Power Key Failure

Keypad fault

Power key Ok ?

No

Measure voltage from S323. Is it high?

No

Check R302,C302,S323 and line. If Okay UEME failure

Yes

Measure voltage from S323 when pressed. Is it high?

Yes

Check S323. Is it Okay?

Yes

Phone is dead

No No

Phone is jammed

Change S323

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RH-12/RH-28 Baseband Troubleshooting Instructions

Volume Up key working?

Measure Row4 line from S320 Is it ~1,8 V?

No

Check S320 and Row4 line. If Ok, change Z300. If it still fails, change TikuEdge

Yes

Measure Col1 from S320 when pressed. Is there a 50 u pulse?

No

Check S320 and Col1 line. If Ok, change Z300. If it still fails, change TikuEdge

Yes

Change TikuEdge

Volume Down key working?

Measure Row4 line from S321 Is it ~1,8 V?

No

Check S321 and Row4 line. If Ok, change Z300. If it still fails, change TikuEdge

Yes

Measure Col2 from S321 when pressed. Is there a 50 u pulse?

No

Check S321 and Col2 line. If Ok, change Z300. If it still fails, change TikuEdge

Yes

Change TikuEdge

Issue 1 02/04

Nokia Corporation

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RH-12/RH-28 Baseband Troubleshooting Instructions UI module keys working
Try to change UI PWB. Are the keys working now ?

CCS Technical Documentation

UI-module keys working

No

Yes

Retest UI module

No

Check X300 & X301 (Soldering and spring contacts). Is it okay? Yes

No

Change X300 and/ or X301

Measure Row0-Row4, UP, DOWN and SELECT lines from X301. Are voltage levels ~1,8 V?

No

Yes Yes Measure SleepX signal (J403), when key is pressed. Is voltage level ~1,8 V? Check lines Row0-Row4, UP, DOWN,and SELECT from X300. If Ok, change Z300 and/or Z301. If it still fails, change TikuEdge

No

Yes

When keypad is pressed, are the LED's lit?

No

End

Illumination fault

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Nokia Corporation

Issue 1 02/04