Issue 107/2010MT
Issue 209/2010MTUpdates have been made to all chapters.
A new service tool, SS-250 Display removal tool, has
been added to chapter
Concepts
.
Service Tools and Service
RM-675; RM-691
Issue 310/2010MTA new section,
been added to chapter
Troubleshooting
Chapter
completely updated.
Sections
Cellular RF Troubleshooting
Baseband main troubleshooting, Bluetooth
and FM radio troubleshooting, WLAN auto tuning
FMTx troubleshooting, NFC troubleshooting
Energy management calibration
Troubleshooting and Manual Tuning Guide
updated.
Issue 402/2011MTSection
Baseband manual tuning guide
Troubleshooting and Manual Tuning Guide
updated with new topics
Product code change
Chapter 7, titled
between RM-691 and RM-675
manual. The new chapter describes the key hardware
differences between the RM-691 and RM-675 variants
of the Nokia C7-00.
without the prior written permission of Nokia is prohibited.
Nokia, Nokia Connecting People, and Nokia X and Y are trademarks or registered trademarks of Nokia
Corporation. Other product and company names mentioned herein may be trademarks or tradenames of
their respective owners.
Nokia operates a policy of continuous development. Nokia reserves the right to make changes and
improvements to any of the products described in this document without prior notice.
Under no circumstances shall Nokia be responsible for any loss of data or income or any special, incidental,
consequential or indirect damages howsoever caused.
The contents of this document are provided "as is". Except as required by applicable law, no warranties of
any kind, either express or implied, including, but not limited to, the implied warranties of merchantability
and fitness for a particular purpose, are made in relation to the accuracy, reliability or contents of this
document. Nokia reserves the right to revise this document or withdraw it at any time without prior notice.
The availability of particular products may vary by region.
IMPORTANT
This document is intended for use by qualified service personnel only.
IF THE DEVICE CAN BE INSTALLED IN A VEHICLE, CARE MUST BE TAKEN ON INSTALLATION IN VEHICLES FITTED
WITH ELECTRONIC ENGINE MANAGEMENT SYSTEMS AND ANTI-SKID BRAKING SYSTEMS. UNDER CERTAIN FAULT
CONDITIONS, EMITTED RF ENERGY CAN AFFECT THEIR OPERATION. IF NECESSARY, CONSULT THE VEHICLE DEALER/
MANUFACTURER TO DETERMINE THE IMMUNITY OF VEHICLE ELECTRONIC SYSTEMS TO RF ENERGY.
•
THE PRODUCT MUST NOT BE OPERATED IN AREAS LIKELY TO CONTAIN POTENTIALLY EXPLOSIVE ATMOSPHERES,
FOR EXAMPLE, PETROL STATIONS (SERVICE STATIONS), BLASTING AREAS ETC.
•
OPERATION OF ANY RADIO TRANSMITTING EQUIPMENT, INCLUDING CELLULAR TELEPHONES, MAY INTERFERE
WITH THE FUNCTIONALITY OF INADEQUATELY PROTECTED MEDICAL DEVICES. CONSULT A PHYSICIAN OR THE
MANUFACTURER OF THE MEDICAL DEVICE IF YOU HAVE ANY QUESTIONS. OTHER ELECTRONIC EQUIPMENT MAY
ALSO BE SUBJECT TO INTERFERENCE.
•
BEFORE MAKING ANY TEST CONNECTIONS, MAKE SURE YOU HAVE SWITCHED OFF ALL EQUIPMENT.
Cautions
•
Servicing and alignment must be undertaken by qualified personnel only.
•
Ensure all work is carried out at an anti-static workstation and that an anti-static wrist strap is worn.
•
Ensure solder, wire, or foreign matter does not enter the telephone as damage may result.
•
Use only approved components as specified in the parts list.
•
Ensure all components, modules, screws and insulators are correctly re-fitted after servicing and
alignment.
•
Ensure all cables and wires are repositioned correctly.
•
Never test a mobile phone WCDMA transmitter with full Tx power, if there is no possibility to perform the
measurements in a good performance RF-shielded room. Even low power WCDMA transmitters may disturb
nearby WCDMA networks and cause problems to 3G cellular phone communication in a wide area.
•
During testing never activate the GSM or WCDMA transmitter without a proper antenna load, otherwise
GSM or WCDMA PA may be damaged.
Nokia requires that service points have sufficient ESD protection (against static electricity) when servicing
the phone.
Any product of which the covers are removed must be handled with ESD protection. The SIM card can be
replaced without ESD protection if the product is otherwise ready for use.
To replace the covers ESD protection must be applied.
All electronic parts of the product are susceptible to ESD. Resistors, too, can be damaged by static electricity
discharge.
All ESD sensitive parts must be packed in metallized protective bags during shipping and handling outside
any ESD Protected Area (EPA).
Every repair action involving opening the product or handling the product components must be done under
ESD protection.
ESD protected spare part packages MUST NOT be opened/closed out of an ESD Protected Area.
For more information and local requirements about ESD protection and ESD Protected Area, contact your local
This product is of superior design and craftsmanship and should be treated with care. The suggestions below
will help you to fulfil any warranty obligations and to enjoy this product for many years.
•
Keep the phone and all its parts and accessories out of the reach of small children.
•
Keep the phone dry. Precipitation, humidity and all types of liquids or moisture can contain minerals that
will corrode electronic circuits.
•
Do not use or store the phone in dusty, dirty areas. Its moving parts can be damaged.
•
Do not store the phone in hot areas. High temperatures can shorten the life of electronic devices, damage
batteries, and warp or melt certain plastics.
•
Do not store the phone in cold areas. When it warms up (to its normal temperature), moisture can form
inside, which may damage electronic circuit boards.
•
Do not drop, knock or shake the phone. Rough handling can break internal circuit boards.
•
Do not use harsh chemicals, cleaning solvents, or strong detergents to clean the phone.
•
Do not paint the phone. Paint can clog the moving parts and prevent proper operation.
•
Use only the supplied or an approved replacement antenna. Unauthorised antennas, modifications or
attachments could damage the phone and may violate regulations governing radio devices.
All of the above suggestions apply equally to the product, battery, charger or any accessory.
Our policy is of continuous development; details of all technical modifications will be included with service
bulletins.
While every endeavour has been made to ensure the accuracy of this document, some errors may exist. If
any errors are found by the reader, NOKIA MOBILE PHONES Business Group should be notified in writing/email.
Please state:
•
Title of the Document + Issue Number/Date of publication
•
Latest Amendment Number (if applicable)
•
Page(s) and/or Figure(s) in error
Please send to:
NOKIA CORPORATION
Nokia Mobile Phones Business Group
Nokia Customer Care
PO Box 86
FIN-24101 SALO
Finland
E-mail: Service.Manuals@nokia.com
Note: A new battery's full performance is achieved only after two or three complete charge and
discharge cycles!
The battery can be charged and discharged hundreds of times but it will eventually wear out. When the
operating time (talk-time and standby time) is noticeably shorter than normal, it is time to buy a new battery.
Use only batteries approved by the phone manufacturer and recharge the battery only with the chargers
approved by the manufacturer. Unplug the charger when not in use. Do not leave the battery connected to
a charger for longer than a week, since overcharging may shorten its lifetime. If left unused a fully charged
battery will discharge itself over time.
Temperature extremes can affect the ability of your battery to charge.
For good operation times with Li-Ion batteries, discharge the battery from time to time by leaving the product
switched on until it turns itself off (or by using the battery discharge facility of any approved accessory
available for the product). Do not attempt to discharge the battery by any other means.
Use the battery only for its intended purpose.
Never use any charger or battery which is damaged.
Do not short-circuit the battery. Accidental short-circuiting can occur when a metallic object (coin, clip or
pen) causes direct connection of the + and - terminals of the battery (metal strips on the battery) for example
when you carry a spare battery in your pocket or purse. Short-circuiting the terminals may damage the battery
or the connecting object.
Leaving the battery in hot or cold places, such as in a closed car in summer or winter conditions, will reduce
the capacity and lifetime of the battery. Always try to keep the battery between 15°C and 25°C (59°F and 77°
F). A phone with a hot or cold battery may temporarily not work, even when the battery is fully charged.
Batteries' performance is particularly limited in temperatures well below freezing.
Do not dispose of batteries in a fire!
Dispose of batteries according to local regulations (e.g. recycling). Do not dispose as household waste.
RM-675; RM-691
Nokia C7-00; L3&4 Service Manual Structure
Nokia C7-00; L3&4 Service Manual Structure
1 General Information
2 Service Tools and Service Concepts
3 BB Troubleshooting and Manual Tuning Guide
4 Cellular RF Troubleshooting
5 Camera Module Troubleshooting
6 System Module
7 Service information differences between RM-691 and RM-675
Glossary
Product features and sales package.................................................................................................................... 1–6
Product and module list ....................................................................................................................................... 1–9
Mobile enhancements........................................................................................................................................... 1–9
Table 3 Data ........................................................................................................................................................ 1–11
RM-675 is a GSM/HSDPA/WCDMA tri-mode handportable monoblock multimedia computer with a capacitive
touch UI, integrated GPS (A-GPS OMA SUPL), WLAN and a TV-out connection. It supports EGSM
850/900/1800/1900 and WCDMA 850/900/1700/1900/2100 bands, and CSD/HSCSD, GPRS/EGPRS and WCDMA/
HSDPA data bearers.
For WCDMA the maximum bit rate is up to 384 kbit/s for downlink and 384 kbit/s for uplink with simultaneous
CS speech or CS video (max. 64 kbit/s). The HSDPA peak is 3.6 Mbit/s downlink (with limited use cases).
In PS/CS mode, RM-675 supports DTM Class with multi slot class 11 (max. 4 RX + 3TX, sum 5). With EGPRS this
means maximum download speed of up to 236.8 kbit/s simultaneously with speech. With GPRS this means
maximum download speed of up to 64.2 kbit/s simultaneously with speech.
In PS only mode, RM-675 supports MSC 33 (max. 5 Rx + 4 TX, sum 6) timeslots resulting in maximum download
speed of up to 296 kbit/s with EGPRS, and up to 107 kbit/s with GPRS.
RM-675 has a large AMOLED nHD 3.5” (640 x 360 pixels) colour display (active area 43.2 mm x 76.8 mm) with
16 million colors. It also has an 8 megapixel EDOF camera, 2x digital zoom and an integrated dual LED flash.
The device supports two-way video calls with two integrated cameras, one on the front and one on the back.
The MMS implementation follows the OMA MMS standard release 1.3. The browser is a highly advanced
Internet browser also capable of viewing operator domain XHTML Mobile Profile (MP) content. The device
also supports Bluetooth 2.1 EDR standard.
RM-675 uses Symbian ^3 for Nokia devices operating system, and supports the full Web Browser for S60,
which brings desktop-like Web browsing experience to mobile devices. It also supports MIDP Java 2.1 ,
providing a good platform for compelling 3rd party applications.
Specifications fulfilled
Operational for shorts periods
only
Operation not guaranteed but an
attempt to operate does not
damage the phone.
Page 26
General Information
Environmental conditionAmbient temperatureNotes
RM-675; RM-691
No operation or storage
Charging allowed
Long term storage conditions
<-40oC...>+85oC
-25oC...+50oC
0oC...+85oC
No storage or operation: an
attempt may damage the phone.
Humidity
Relative humidity range is 5...95%.
The HW module is not protected against water. Condensed or splashed water might cause malfunction. Any
submersion of the phone will cause permanent damage. Long-term high humidity, with condensation, will
cause permanent damage because of corrosion.
Vibration
The module should withstand the following vibrations:
•
5 - 10 Hz; +10dB / octave
•
10 - 50 Hz; 5.58 m2 / s3 (0.0558 g2/ Hz)
•
50 - 300 Hz; - 10 dB / octave
ESD strength
Conducted discharge is 8 kV (>10 discharges) and air contact 15 kV ( >10 discharges ).
The standard for electrostatic discharge is IEC 61000-4-2, and this device fulfils level 4 requirements.
RoHS
This device uses RoHS compliant components and lead-free soldering process.
Service tools........................................................................................................................................................... 2–5
Product specific tools....................................................................................................................................... 2–5
General tools..................................................................................................................................................... 2–6
Installation instructions for CA-181RS ........................................................................................................ 2–14
Service concepts ................................................................................................................................................. 2–22
POS (Point of Sale) flash concept ................................................................................................................. 2–22
BB5 USB only – Basic flash concept L3......................................................................................................... 2–23
Level 3 concept for flashing, certificate restore and product code change option 3............................. 2–24
Module jig service concept........................................................................................................................... 2–25
BB/RF tuning concept with module jig ....................................................................................................... 2–26
Bluetooth testing concept with SB-6 .......................................................................................................... 2–27
WLAN functionality testing concept with SB-7 .......................................................................................... 2–28
The table below gives a short overview of service devices that can be used for testing, error analysis, and
repair of product RM-675; RM-691. For the correct use of the service devices, and the best effort of workbench
setup, please refer to various concepts.
CA-181RSRF tuning cable
CA-181RS is a product-specific adapter cable for RF tuning with the
module jig.
MJ-277Module jig
MJ-277 is meant for troubleshooting, testing, tuning and flashing on
the engine level (CU-4 supported).
The jig includes an RF interface for GSM, WCDMA, WLAN and Bluetooth.
In addition, it has the following features:
•
Provides mechanical interface with the engine module
•
Provides galvanic connection to all needed test pads in module
•
Multiplexing between USB and FBUS media, controlled by Vusb
•
MMC interface
•
Duplicated SIM connector
•
Connector for control unit
•
Access for AV- and USB connectors
•
CA-181RS cable is used together with this jig for RF testing
•
Attenuation values for galvanic RF connection MJ-277
SD-77Dummy battery
SD-77 is designed to support mass SW flashing which enables local
mode while connecting the phone. This dummy battery can be used
with Nokia battery types BL-5K, BV-4D, BL-4D, BP-4L.
SS-231RF coaxial cable tool
SS-231 is an RF coaxial cable tool designed to remove/connect the RF
coaxial cable from the RF connector on PWB. This tool can also be used
for the RF connection between CA-181RS and module jig for RF tuning.
SS-250Display removal tool
SS-250 is used for removing the display from the chassis assembly.
General tools
The table below gives a short overview of service devices that can be used for testing, error analysis, and
repair of product RM-675; RM-691. For the correct use of the service devices, and the best effort of workbench
setup, please refer to various concepts.
AC-35Power supply
Universal power supply for FPS-21; included in the FPS-21 sales
package.
Input 100V…230V 50Hz…60Hz, output voltage of 12 V and output
CU-4Control unit
CU-4 is a general service tool used with a module jig and/or a flash
adapter. It requires an external 12 V power supply.
The unit has the following features:
•
software controlled via USB
•
EM calibration function
•
Forwards FBUS/Flashbus traffic to/from terminal
•
Forwards USB traffic to/from terminal
•
software controlled BSI values
•
regulated VBATT voltage
•
2 x USB2.0 connector (Hub)
•
FBUS and USB connections supported
When using CU-4, note the special order of connecting cables and
other service equipment:
Instructions
1 Connect a service tool (jig, flash adapter) to CU-4.
2 Connect CU-4 to your PC with a USB cable.
3 Connect supply voltage (12 V)
4 Connect an FBUS cable (if necessary).
5 Start Phoenix service software.
Note: Phoenix enables CU-4 regulators via USB when it is
started.
Reconnecting the power supply requires a Phoenix restart.
JXS-1RF shield box
Because the WCDMA network disturbs the RX side testing of the WCDMA
phone and the Tx signal of the WCDMA phone can severely disturb the
WCDMA network, a shield box is needed in all testing, tuning and fault
finding which requires WCDMA RF signal.
The shield box is not an active device, it contains only passive filtering
components for RF attenuation.
PK-1Software protection
key
PK-1 is a hardware protection key with a USB interface. It has the same
functionality as the PKD-1 series dongle.
PK-1 is meant for use with a PC that does not have a series interface.
To use this USB dongle for security service functions please register
the dongle in the same way as the PKD-1 series dongle.
SB-6Bluetooth test and
interface box (sales
package)
The SB-6 test box is a generic service device used to perform Bluetooth
bit error rate (BER) testing, and establishing cordless FBUS connection
via Bluetooth. An ACP-8x charger is needed for BER testing and an
AXS-4 cable in case of cordless interface usage testing .
Sales package includes:
•
SB-6 test box
•
Installation and warranty information
SB-7WLAN test box
WLAN test requires defined position for the device.
SX-4Smart card
SX-4 is a BB5 security device used to protect critical features in tuning
and testing.
SX-4 is also needed together with FPS-21 when DCT-4 phones are
flashed.
Cables
The table below gives a short overview of service devices that can be used for testing, error analysis, and
repair of product RM-675; RM-691. For the correct use of the service devices, and the best effort of workbench
setup, please refer to various concepts.
CA-101Micro USB cable
The CA-101 is a USB-to-microUSB data cable that allows connections
between the PC and the phone.
CA-31DUSB cable
The CA-31D USB cable is used to connect FPS-21 to a PC. It is included
RM-675; RM-691
BB Troubleshooting and Manual Tuning Guide
Table of Contents
Baseband main troubleshooting......................................................................................................................... 3–5
Power and charging troubleshooting................................................................................................................. 3–8
TV out troubleshooting...................................................................................................................................... 3–21
Introduction to SDTV troubleshooting........................................................................................................ 3–21
SDTV out troubleshooting ............................................................................................................................ 3–22
Power key troubleshooting.......................................................................................................................... 3–30
ALS technical description and troubleshooting .............................................................................................. 3–43
ALS troubleshooting...................................................................................................................................... 3–43
Bluetooth and FM radio troubleshooting ........................................................................................................ 3–44
Introduction to Bluetooth/FM radio troubleshooting............................................................................... 3–44
Bluetooth BER test......................................................................................................................................... 3–46
Bluetooth and FM radio self tests in Phoenix............................................................................................. 3–46
Bluetooth troubleshooting .......................................................................................................................... 3–48
FM radio troubleshooting............................................................................................................................. 3–48
FM radio testing............................................................................................................................................. 3–49
GPS layout and basic test points.................................................................................................................. 3–50
GPS settings for Phoenix............................................................................................................................... 3–50
Quick Test window................................................................................................................................... 3–50
WLAN settings for Phoenix........................................................................................................................... 3–53
WLAN auto tuning......................................................................................................................................... 3–57
General ........................................................................................................................................................... 3–59
General visual inspection guidelines........................................................................................................... 3–59
RM-675; RM-691
BB Troubleshooting and Manual Tuning Guide
Baseband main troubleshooting
Context
Always start the troubleshooting procedure by running the Phoenix self tests. If a test fails, please follow the
diagrams below. If the phone is dead and you cannot perform the self tests, go to
The IVE engine is a next generation imaging and video engine based on BCM2727B. The BCM2727B acts as
imaging, video, display, and HDTV and SDTV hardware accelerator.
The following references on the PWB help in the effective debugging and troubleshooting of IVE.
RM-675; RM-691
BB Troubleshooting and Manual Tuning Guide
Sr. NoReferenceDescription
1B140019.2MHz Crystal
2D1400IVE/BCM2727B IC
The following test points on the PWB help in effective debugging and troubleshooting.
Sr. NoSignal nameMeasuring pointDescription
1VIVE_2V5_FILTL14062.5V supply to BCM2727B
2VIVE_2V8_FILTL14042.8V supply to BCM2727B
3VIVE_1V8_FILTL14021.8V supply to BCM2727B
4VBATL1407VBAT supply to BCM2727B
5RUNJ1451Enable signal to IVE. This needs to be
RM-675; RM-691
BB Troubleshooting and Manual Tuning Guide
Figure 10 Expected Crystal clock input to BCM2727B on Oscilloscope
TV out troubleshooting
Introduction to SDTV troubleshooting
SDTV
The phone has SDTV capability. The phone can be connected to an analog TV through a TV Out cable.
The following references on the PWB help in the effective debugging and troubleshooting of SDTV Out.
Sr. NoReferenceDescription
1R1419DAC termination resistor. Resistor value 15 OHMS.
2D1400BCM2727B IC
3N2001Analog switch
4L2001Ferrite bead on the CVBS signal
5X2000AV connector
The following test points on the PWB help in effective debugging and troubleshooting.
The first step is to verify with a working display that the fault is not on the display module itself. The display
module cannot be repaired.
The second step is to check that the engine is working normally. This can be done by connecting the phone
to a docking station and starting Phoenix service software. With the help of Phoenix read the phone
information to check that also the application engine is functioning normally (you should be able to read the
APE ID).
After these checks proceed to the display troubleshooting flowcharts. Use the Display Test tool in Phoenix to
find the detailed fault mode.
Pixel defects
Table 6 Display module troubleshooting cases
Display blankThere is no image on the display. The display looks
the same when the phone is on as it does when the
phone is off. The backlight can be on in some cases.
Image on the display not correctImage on the display can be corrupted or a part of
the image can be missing. If a part of the image is
missing, change the display module. If the image is
otherwise corrupted, follow the appropriate
troubleshooting diagram.
Backlight dim or not working at allBacklight LED components are inside the display
module. Backlight failure can also be in the
connector or in the backlight power source in the
main engine of the phone. Backlight is also
controlled automatically by the ambient light
sensor.
This means that in case the display is working
(image OK), the backlight is faulty.
Visual defects (pixel)Pixel defects can be checked by controlling the
display with Phoenix. Use both colours, black and
white, on a full screen.
The display may have some random pixel defects
that are acceptable for this type of display. The
criteria when pixel defects are regarded as a display
failure, resulting in a replacement of the display, are
presented the following table.
Table 7 Pixel defects
Bright sub-pixels(sometimes called on-pixels or stuck-on) are
characterized by the appearance of bright/colored
pixels in, for example, black full screen picture.
RM-675; RM-691
BB Troubleshooting and Manual Tuning Guide
Dark sub-pixels(sometimes called off-pixels, stuck-off, or black
pixels) are characterized by the appearance of dark
pixels in white, red, green, or blue full-screen
picture.
Combined sub-pixeldefects are characterized by at least two sub-pixels
defects (bright or dim) being closer than 5 mm to
each other.
Temporal sub-pixels(sometimes called blinking defects) exhibit
temporal variations not related to any steady-state
video input. Temporal sub-pixel defects may be
intermittent, exhibit a sudden change of state, or
be flickering.
Table 8 Defects table
ItemBright dot (sub-
pixel) defect
Dark dot (sub-
pixel) defect
Total
1Defect countsNot allowed
2Combined sub-
Not allowed
pixel defect
3Temporal sub-
Not allowed
pixel defect
Note: Blinking pixels are not allowed in normal operating temperatures and light conditions.
Introduction to display troubleshooting
The display module used is based on AM OLED technology and supports display format of 360 columns x 640
rows. The dimension of the display module is 47.8 mm x 86.3 mm x 2.12 mm. The module will interface to
the phone via FPC with a 20 pins board to board connector.
The following references on the PWB help in the effective debugging and troubleshooting of the display.
Sr NoReferenceDescription
1X1600Display connector
2R1604Series resistor on display Reset line. Reset signal needs to be
High for the display to be Up.
3D1400BCM2727B IC
The following test points on the PWB help in effective debugging and troubleshooting.
Sr. NoSignal nameMeasuring pointDescription
1VIOL16021.8V supply to display
2VBATL1601VBAT supply to display
3DISP_RESET_NR1604Reset signal to display module. The reset signal
RM-675; RM-691
BB Troubleshooting and Manual Tuning Guide
Internal handsfree output is measured using a current probe, if a special low-pass filter designed for
measuring a digital amplifier is not available. Note also that when using a current probe, the input signal
frequency must be set to 2 kHz.
The input signal for each loop test can be either single-ended or differential. Exception to this is a digital
microphone which needs input signal from an external sound source (laptop speaker) to playback, eg. 1 kHz
sine wave from 5 cm distance.
Required equipment
The following equipment is needed for the tests:
•
Oscilloscope
•
Function generator (sine waveform)
•
Current probe (Internal handsfree DPMA output measurement)
•
Phoenix service software
•
Battery voltage 3.7V
•
Sound source (laptop speaker or B&K type 4231 calibrator)
Test procedure
Audio can be tested using the Phoenix audio routings option. Three different audio loop paths can be
activated:
•
External headset mic to earpiece
•
External headset mic to IHF mono
•
Internal digital microphone to headset
Each audio loop sets routing from the specified input to the specified output enabling a quick in-out test.
Loop path gains are fixed and they cannot be changed using Phoenix. Correct pins and signals for each test
are presented in the following table.
Phoenix audio loop tests and test results
The results presented in the table apply when no accessory is connected and battery voltage is set to 3.7V.
Earpiece, internal microphone and speaker are in place during measurement. Applying a headset accessory
during measurement causes a significant drop in measured quantities.
The gain values presented in the table apply for a differential output vs. single-ended/differential input.
Introduction to Bluetooth/FM radio troubleshooting
Bluetooth/WLAN antenna
The Bluetooth/WLAN signal is generated from BOB to the shared WLAN/BT antenna on the phone's B-cover.
Check the antenna pin contacts with Bluetooth/WLAN antenna.
Figure 13 Bluetooth/WLAN antenna
Introduction to Bluetooth/FM radio troubleshooting
The Bluetooth and FM radio are combined in the same ASIC, so both features are checked when
troubleshooting.
The following problems can occur with the Bluetooth and FM radio hardware:
SymptomProblemRepair solution
Unable to switch on Bluetooth on
phone user interface
Able to send data file to another
Bluetooth device, but unable to
hear audio through functional
Bluetooth headset
Able to switch on Bluetooth on
phone user interface, but unable
to detect other Bluetooth devices
Open circuit solder joints or
component failure of BTH/FM
ASIC/module BB ASICs or SMD
components
Open circuit solder joints or
component failure of BTH/FM
ASIC/module BB ASICs
Open circuit solder joints or
antenna pins not making
contact with Bluetooth/WLAN
antenna
RM-675; RM-691
BB Troubleshooting and Manual Tuning Guide
SymptomProblemRepair solution
Able to turn on FM radio and
Bluetooth on phone user
interface, but unable to detect
local FM radio stations with Nokia
headset inserted
Able to perform scans to detect
local FM radio stations with
functional Nokia headset
inserted, but unable to hear FM
audio through headset
Users may experience the following problems resulting in functional phones being returned to the repair
centre:
SymptomProblemRepair solution
Bluetooth feature does not
operate as desired with another
Bluetooth device
Poor FM radio reception (unable
to detect many radio stations)
Open circuit solder joints or
detached component in FM
antenna circuit
Check antenna pin contacts with
FM antenna (headset jack)
Open circuit solder joints or
detached component in FM
audio path between Bluetooth/
FM ASIC and headset
Bluetooth Profile implemented
in Bluetooth accessory not
supported in Nokia phone
Nokia headset not being usedUse Nokia headset
Repair components
Repair of FM audio circuit
Use Bluetooth accessory with
Bluetooth profiles supported
by phone
Test coverage
The tests listed in the table below should be performed to verify whether the Bluetooth and FM receiver and
transmitter are functional. The use of Self Tests are described in section
The self tests run from Phoenix software are used for fault diagnosis.
If Phoenix software is not available the functional tests with phone accessories are sufficient to verify the
functionality Bluetooth and FM radio receiver and transmitter.
Bluetooth/FM radio component layout and test points
The Bluetooth antenna is product specific (antenna integrated into phone B-cover). On phones with WLAN,
the Bluetooth RF signal is routed through a WLAN front-end module and a shared Bluetooth/WLAN antenna
is used. The FM RF signal is routed through a product specific FM antenna matching circuit to the phone
headset connector. The FM radio audio signal is routed to the headset connector through the BB ASIC shared
by the phone audio functions.
Bluetooth BER test
Prerequisites
JBT-9, or SB-6 Bluetooth test box (BT-box) is required to perform a BER test. If a BT-box not available Bluetooth
functionality can be checked by transferring a file to another Bluetooth phone.
Steps
1. Connect data cable to phone.
2. Start
3. Choose File → Scan Product.
Phoenix
service software.
4. Choose Testing → Bluetooth LOCALS .
5. Locate the BT-box serial number (12 digits) found in the type label on the back of the JBT-9, or SB-6
Bluetooth test box.
6. In the Bluetooth
Address
7. Place the BT-box near (within 10 cm) of the phone and click Start BER Test.
line.
LOCALS
window, write the 12-digit serial number on the
Counterpart BT Device
Bluetooth and FM radio self tests in Phoenix
Prerequisites
A flash adapter (or phone data cable) connected to a PC with Phoenix service software is required.
Steps
1. Place the phone in the flash adapter or connect data cable to phone.
2. Start
3. Choose File→Scan Product.
4. From the Mode drop-down menu, set mode to Local.
5. Choose Testing→Self Tests.
6. In the
Phoenix
Self Tests
•
ST_LPRF_IF_TEST
•
ST_LPRF_AUDIO_LINES_TEST
•
ST_BT_WAKEUP_TEST
service software.
window check the following Bluetooth and FM radio related tests: