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.
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.
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
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 Ni-Cd/NiMh 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.
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
RM-249; RM-250
Nokia 7500; Nokia 7500b Service Manual Structure
Nokia 7500; Nokia 7500b Service Manual Structure
1 General information
2 Service Devices and Service Concepts
3 BB Troubleshooting and Manual Tuning Guide
4 RF Troubleshooting and Manual Tuning Guide
5 System module
Glossary
Phone features .......................................................................................................................................................1–5
Software and User interface features ..................................................................................................................1–6
General specifications.......................................................................................................................................1–9
Figure 1 View of RM-249/250................................................................................................................................1–5
Nokia Series 40 User interface (UI): JavaTM MIDP 2.0
UI features
Imaging• 2.0-megapixel camera with 8x digital zoom (1600 x 1200 pixel
resolution)
• Full-screen viewfinder
• PictBridge printing via USB cable
Multimedia• MP3 player supporting formats including MP3, Midi, AAC, AAC+, enhanced
AAC+, WMA
• FM stereo radio, Visual Radio and music player
• 3GPP video player/recorder
• MP3 ringing tones, True tones and MIDI tones, with support of 64
polyphony
Memory functions• Combo memory with 64 MB flash, about 40 MB user memory (for gallery
and applications, contacts, notes, calendar entries)
Messaging• Simplified messaging with recently used contacts log and groups
• Email: Access your work and private email accounts; supports SMTP,
POP3, and IMAP4 protocols. Support for attachments (Java version)
• Audio messaging service (AMS): Record your own voice message and send
to compatible devices
• MMS OMA 1.2: Combine image, video, text, and voice clips and send as an
MMS to a compatible phone or PC; use MMS to tell your story with a multislide presentation. The MMS OMA 1.2 specification allows you to send/
receive messages up to 300 kB in size.
• Text messaging: Supports concatenated SMS, picture messaging, SMS
distribution list
• Predictive text input: Support for all major languages in Europe and AsiaPacific
Applications• Java™ MIDP 2.0 with over-the-air download
• Pre-installed Java™-based applications and games
• SIM Application Toolkit
Connectivity• Nokia PC Suite with USB and Bluetooth connectivity
• Bluetooth wireless connectivity (SIM access, headset, and handsfree
profiles) incl. stereo support for headsets
• Nokia AV connector interface with USB
• FOTA (Flashing over-the-air)
• Local/remote SyncML data synchronization
Browsing• Integrated XHTML browser
• Smart content download - OMA DRM 2.0
Data transfer• EDGE (EGPRS): Class 10, download up to 236.8 kbps
• GPRS: Class 10, download up to 53.6 kbps
Note: Actual achieved speeds may vary depending on network support
• GPRS/EDGE/HSCSD/CSD for browsing and as data modem
• Downlink Advanced Receiver Performance (DARP)
Voice features• Push To Talk: Select the person or group you want to talk to and press
the Push To Talk key to communicate
• Enhanced voice dialling with SIND: Speaker-independent name dialling
for easy call handling
• Integrated handsfree speaker with a new high quality speaker for better
audio experience (stereo widening effects when attaching the headset)
• Voice commands
• Voice recorder
Digital services• User Interface (UI) themes including e.g. animated wallpapers,
screensavers, color schemes, ringing tones
• Ringing tones: Video, MP3 ringing tones, True Tones and MIDI ringing,
alert, and gaming tones with support of 64 polyphony
• OTA download possibility for: Themes, True Tones, MP3 ringing tones,
MIDI ringing tones, screensavers, wallpapers, 3GPP streaming, images
and videos, Series 40 Java games and applications
Personal information
management (PIM)
• Organizer with alarm clock, calendar, to-do list, notes, calculator,
countdown timer, and stopwatch
• Manage your time and information with the enhanced calendar that can
be synchronized, for example, with Microsoft and Lotus PIM application
calendars by using the Nokia PC Suite
Call management• Speed dialling
• Logs: Keeps lists of your dialled, received, and missed calls
• Automatic answer (works with headset or car kit only)
AD-50Universal Headset Adapter
HS-40Wired Headset
HS-47Wired stereo Headset
HS-60Wired Fashion stereo Headset
HS-81Wired Headset
HS-24WNokia Bluetooth Headset BH-800
HS-25WNokia Bluetooth Headset BH-900
HS-38WNokia Bluetooth Headset BH-202
HS-39WNokia Bluetooth Headset BH-500
RM-249; RM-250
General information
HS-50WNokia Bluetooth Headset BH-300
HS-51WNokia Bluetooth Headset BH-301
HS-57WNokia Bluetooth Headset BH-700
HS-58WNokia Bluetooth Headset BH-200
HS-59WNokia Bluetooth Headset BH-600
HS-64WNokia Bluetooth Headset BH-801
HS-68WNokia Bluetooth Headset BH-203
HS-71WNokia Bluetooth Headset BH-501
HS-73WNokia Bluetooth Headset BH-302
HS-78WNokia Bluetooth Headset BH-100
HS-84WNokia Bluetooth Headset BH-204
HS-85WNokia Bluetooth Headset BH-206
HS-86WNokia Bluetooth Headset BH-207
HS-88WNokia Bluetooth Headset BH-205
RM-249; RM-250
Service Devices and Service Concepts
Table of Contents
Service devices........................................................................................................................................................2–5
Product specific devices....................................................................................................................................2–5
General devices..................................................................................................................................................2–7
Service concepts .................................................................................................................................................. 2–15
POS (Point of Sale) flash concept .................................................................................................................. 2–15
Flash concept with FPS-10............................................................................................................................. 2–16
CU-4 flash concept with FPS-10..................................................................................................................... 2–17
Module jig service concept............................................................................................................................ 2–18
RF testing concept with RF coupler .............................................................................................................. 2–19
Service concept for RF testing and RF/BB tuning........................................................................................ 2–20
RM-249; RM-250
Service Devices and Service Concepts
Service devices
Product specific devices
The table below gives a short overview of service tools that can be used for testing, error analysis and repair
of product RM-249; RM-250, refer to various concepts.
FS-55Flash adapter
For flashing (also dead phones) with SS-64. RF testing and tuning, and
EM calibration on ATO level with SS-62 (mechanical locking concept),
CU-4 supported.
MJ-140Module jig
MJ-140 is meant for troubleshooting, testing, tuning and flashing on
the engine level (CU-4 supported).
The jig includes an RF interface for GSM and Bluetooth.
The following table shows the attenuation values for galvanic RF
RM-249; RM-250
Service Devices and Service Concepts
SS-101Domesheet
alignment jig
The purpose of this tool is to support the placement of a domesheet
to the PWB.
General devices
The table below gives a short overview of service tools that can be used for testing, error analysis and repair
of product RM-249; RM-250, refer to various concepts.
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.
The JBT-9 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:
• JBT-9 test box
• Installation and warranty information
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.
PKD-1SW security device
SW security device is a piece of hardware enabling the use of the
service software when connected to the parallel (LPT) port of the PC.
Without the device, it is not possible to use the service software.
Printer or any such device can be connected to the PC through the
device if needed.
RJ-93Rework jig
RJ-93 is used as a rework jig for the engine module.
This stencil takes the front end module (FEM) or power amplifier (PA)
module for spreading the soldering paste to the component. Must be
used together with the ST-40 stencil.
SPS-1Soldering Paste
Spreader
The SPS-1 allows spreading of solder to the LGA components pads over
the rework stencils.
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-10 when DCT-4 phones are
flashed.
Cables
The table below gives a short overview of service tools that can be used for testing, error analysis and repair
of product RM-249; RM-250, refer to various concepts.
CA-31DUSB cable
The CA-31D USB cable is used to connect FPS-10 or FPS-11 to a PC. It is
included in the FPS-10 and FPS-11 sales packages.
CA-35SPower cable
CA-35S is a power cable for connecting, for example, the FPS-10 flash
prommer to the Point-Of-Sales (POS) flash adapter.
RM-249; RM-250
BB Troubleshooting and Manual Tuning Guide
Table of Contents
Power and charging troubleshooting..................................................................................................................3–5
Cannot power on...............................................................................................................................................3–5
Dead or jammed device troubleshooting.......................................................................................................3–6
General power checking...................................................................................................................................3–7
USB interface troubleshooting...................................................................................................................... 3–13
User interface troubleshooting.......................................................................................................................... 3–16
Keypad, side and media keys troubleshooting........................................................................................... 3–16
Power key troubleshooting........................................................................................................................... 3–17
LED driver troubleshooting ...................................................................................................................... 3–20
Camera module troubleshooting....................................................................................................................... 3–21
Introduction to camera troubleshooting .................................................................................................... 3–21
Taking and evaluating test pictures with main camera ............................................................................ 3–21
Camera troubleshooting................................................................................................................................ 3–23
Camera troubleshooting........................................................................................................................... 3–23
Camera and HWA hardware troubleshooting ........................................................................................ 3–23
LED camera flash troubleshooting .......................................................................................................... 3–25
Internal audio signal flow........................................................................................................................ 3–30
There are two possible failure modes in the keyboard module:
• One or more keys are stuck, so that the key does not react when a keydome or a side key is pressed. This
kind of failure is caused by mechanical reasons (dirt, rust, mechanical damage, etc.)
• Malfunction of several keys at the same time; this happens when one or more rows or columns in the key
matrix are failing (shortcut or open connection).
If the failure mode is not clear, start with the Keyboard test in Phoenix.
• The operating modes of the display can be controlled with the help of
Table 1 Display module troubleshooting cases
Phoenix
.
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.
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 2 Pixel defects
ItemWhite dot defectBlack dot
Total
defect
1Defect countsRGBWhite Dot
11
Total
1111
2Combined
defect counts
Not allowed.
Two single dot defects that are within 5 mm of each other should be
interpreted as combined dot defect.
Steps
1. Verify with a working display that the fault is not on the display module itself.
The display module cannot be repaired.
2. Check that the cellular engine is working normally.
iTo check the functionality, connect the phone to a docking station.
iiStart
iii Read the phone information to check that also the application engine is functioning normally (you
RM-249; RM-250
BB Troubleshooting and Manual Tuning Guide
Troubleshooting flow
Camera module troubleshooting
Introduction to camera troubleshooting
Bad conditions often cause bad pictures. Therefore, the camera operation has to be checked in constant
conditions or by using a second, known-to-be-good Nokia device as reference. Image quality is hard to
measure quantitatively, and the difference between a good and a bad picture can be small. Some training
or experience may be needed to detect what is actually wrong.
When checking for possible errors in camera functionality, knowing what error is suspected significantly
helps the testing by narrowing down the amount of test cases. The following types of image quality problems
are common:
• Dust (black spots)
• Lack of sharpness
• Bit errors
Taking and evaluating test pictures with main camera
When
• Avoid bright fluorescent light, 50/60Hz electrical network or high artificial illumination levels
• If the phone is hot, let it rest for a while before taking the picture
Differential external earpiece and internal earpiece outputs can be measured either with a single-ended or
a differential probe.
When measuring with a single-ended probe each output is measured against the ground.
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 2kHz.
The input signal for each loop test can be either single-ended or differential.
Required equipment
The following equipment is needed for the tests:
• Oscilloscope
• Function generator (sine waveform)
• 'Active speaker' or 'speaker and power amplifier'
• Sound level meter
• Current probe (Internal handsfree DPMA output measurement)
• Phoenix service software
• Battery voltage 3.7V
Test procedure
Audio can be tested using the Phoenix audio routings option. Three different audio loop paths can be
activated:
• External microphone to Internal earpiece
• External microphone to Internal handsfree speaker
• Internal microphone to External earpiece
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.
Figure 10 Single-ended output waveform of the Ext_in_HP_out measurement when earpiece is connected.
If a special low-pass filter designed for measuring digital amplifiers is unavailable, the measurement must be performed with a
current probe and the input signal frequency must be 2kHz.
Figure 11 Differential output waveform of the Ext_in_IHF_out out loop measurement when speaker is connected.
RM-249; RM-250
BB Troubleshooting and Manual Tuning Guide
Baseband manual tuning guide
Certificate restoring for BB5 products
Context
This procedure is performed when the device certificate is corrupted for some reason.
All tunings (RF & Baseband, UI) must be done after performing the certificate restoring procedure.
The procedure for certificate restoring is the following:
• Flash the phone with the latest available software using FPS-8 or FPS-10.
Note: USB flashing does not work for a dead BB5 phone.
• Create a request file.
• Send the file to Nokia by e-mail. Use the following addresses depending on your location:
• APAC: sydney.service@nokia.com
• CHINA: repair.ams@nokia.com
• E&A: salo.repair@nokia.com
• AMERICAS: fls1.usa@nokia.com
• When you receive a reply from Nokia, carry out certificate restoring.
• Tune the phone completely.
Note: SX-4 smart card is needed.
• If the phone resets after certificate restoring, reflash the phone again.
Required equipment and setup:
•
Phoenix
• The latest phone model specific
• PKD-1 dongle
• SX-4 smart card (Enables BB5 testing and tuning features)
• External smart card reader
• Activated FPS-8 flash prommer OR FPS-10 flash prommer
• Flash update package 03.18.004 or newer for FPS-8 or FPS-10 flash prommers
• CU-4 control unit
• USB cable from PC USB Port to CU-4 control unit
• Phone model specific adapter for CU-4 control unit
• PCS-1 cable to power CU-4 from external power supply
• XCS-4 modular cable between flash prommer and CU-4
service software v 2004.39.7.70 or newer.
Phoenix
Note: The smart card reader is only needed when FPS-8 is used. FPS-10 has an integrated smart card
reader.
Note: CU-4 must be supplied with +12 V from an external power supply in all steps of certificate
restoring.
data package.
Steps
1. Program the phone software.
iStart
Issue 1COMPANY CONFIDENTIALPage 3 –37
Phoenix
and login. Make sure the connection has been managed correctly for FPS-8 or FPS-10.
RM-249; RM-250
BB Troubleshooting and Manual Tuning Guide
Programming is completed when
The product type designator and MCU SW version are displayed in the status bar.
vi Close the
2. Create a
For this procedure, you must supply +12 V to CU-4 from an external power supply.
iTo connect the phone with
iiChoose Tools→Certificate Restore .
iii To choose a location for the request file, click Browse.
iv Name the file so that you can easily identify it, and click Open.
The name of the file and its location are shown.
RM-249; RM-250
vTo create the
vi When the file for certificate restore has been created, send it to Nokia as an e-mail attachment.
3. Restore certificate.
For this procedure, you must supply +12 V to CU-4 from an external power supply.
iSave the reply file sent by Nokia to your computer.
iiStart
iii Choose File→Scan Product .
Energy Management (EM) calibration is performed to calibrate the setting (gain and offset) of AD converters
in several channels (that is, battery voltage, BSI, battery current) to get an accurate AD conversion result.
Hardware setup:
• An external power supply is needed.
• Supply 12V DC from an external power supply to CU-4 to power up the phone.
• The phone must be connected to a CU-4 control unit with a product-specific flash adapter.
Steps
1.Place the phone to the docking station adapter (CU-4 is connected to the adapter).
2.Start
3.Choose File→ Scan Product.
4.Choose Tuning→Energy Management Calibration.
5.To show the current values in the phone memory, click Read, and check that communication between
6.Check that the CU-4 used check box is checked.
7.Select the item(s) to be calibrated.
8.Click Calibrate.
Phoenix
the phone and CU-4 works.
Note: ADC calibration has to be performed before other item(s). However, if all calibrations are
selected at the same time, there is no need to perform the ADC calibration first.
The calibration of the selected item(s) is carried out automatically.
The candidates for the new calibration values are shown in the
calibration values seem to be acceptable (please refer to the following "Calibration value limits" table),
click Write to store the new calibration values to the phone permanent memory.
RM-249; RM-250
RF Troubleshooting and Manual Tuning Guide
Table of Contents
RF self tests in Phoenix ..........................................................................................................................................4–5
Introduction to RF troubleshooting .....................................................................................................................4–6
Introduction to RF tunings............................................................................................................................ 4–19
Auto tuning for BB5.0 .................................................................................................................................... 4–19
System mode independent manual tunings .................................................................................................... 4–20
Tx IQ tuning (GSM).......................................................................................................................................... 4–27
Tx power level tuning (GSM) ......................................................................................................................... 4–29
Figure 18 Location of the GSM and BT antenna C-clips on the PWB............................................................... 4–16
Figure 19 GSM and BT antenna contact pads on the antenna module.......................................................... 4–17
Figure 20 Antenna C-clips on the PWB .............................................................................................................. 4–17
Figure 21 Auto tuning concept with CMU200................................................................................................... 4–19
On the following pages you will find a step-by-step troubleshooting procedure and reference measurements
at the relevant signal points. For functional descriptions, please refer to the System module section.
Notes on reference measurements
All measurements must be done using:
• spectrum analyser with a high-frequency high-impedance passive probe (LO-/reference frequencies and
RF power levels)
• oscilloscope with a 10:1 probe (DC-voltages and low frequency signals)
Important: All measurements with an RF coupler must be performed in an RF shielded environment,
or where there are no transmissions on the same frequencies. This may disturb sensitive receiver
measurements.
Repairing this phone - important
The RF section of the phone is built around one RF ASIC. Before changing the RF ASIC, please make sure that
supply voltages and serial communication coming from baseband to RF are OK.
Please note that the grounding of the FEM module is directly below the FEM module. Therefore, it is difficult
to check or change the module.
Most RF semiconductors are static discharge sensitive! ESD protection must be taken care of during repair
(ground straps and ESD soldering irons). The RF ASIC and FEM are moisture sensitive, so parts must be prebaked prior to soldering.
In addition to key components, there are lot of discrete components (resistors, inductors and capacitors)
which troubleshooting is done mainly by checking if the soldering of the component is done properly.
Capacitor can be checked for shorts and resistors for value by means of an ohmmeter, but be aware in-circuit
measurements should be evaluated carefully.
Keep in mind that all measured voltages or RF levels depicted in the service manual are rough figures.
Especially RF levels vary because of different measuring equipment or different grounding of the probe used.
When using an RF probe, use a pair of metallic tweezers to connect the probe ground to the PWB ground as
close to the measurement point as possible. If measurements are performed in a product specific module
jig, then “GND” pads should be used for the probe ground.
Supported bands
The following part of the service manual contains a description of all four GSM bands. It covers both variants,
RM-249 and RM-250. Both variants support three GSM bands as follows:
• RM-249: GSM900, GSM1800, GSM1900
• RM-250: GSM850, GSM1800, GSM1900
Make sure to investigate only the bands, which the phone is made for.
RM-249; RM-250
RF Troubleshooting and Manual Tuning Guide
RF key components
Figure 14 RF key components, bottom side main board
Receiver troubleshooting
Introduction to RX troubleshooting
Rx can be tested by making a phone call or in the local mode. For the local mode testing, use Phoenix service
software.
The main Rx troubleshooting measurement is RSSI measurement. This test measures the signal strength of
the received signal. I and Q branches can be measured separately.
In GSM, the input signal can be either a real GSM signal or a CW signal that is 67.71 kHz up from the carrier
frequency.
For service tool usage instructions, refer to section Service Tools and Service Concepts.
General instructions for RX troubleshooting
Steps
1. Connect a test jig to a computer with a DAU-9S cable or to a FPS-10 flash prommer with a modular cable
(XCS-4).
Make sure that you have a PKD-1 dongle connected to the computer's parallel port.
2. Connect CU-4 with 12 V supply. The DC supply voltage is set to 3.7 V by default (in Phoenix).
3. Connect an RF cable between the RF connector of the module test jig (MJ-140) and measurement
equipment or alternatively use a 50 Ω (at least 2 W) dummy load in the module test jig RF connector,
otherwise the RF part may be damaged.
Note: Make sure that all connections are made to the correct RF connector.
4. Set Rx on.
iSet the phone module to the test jig and start
iiInitialize connection to the phone. (With the FPS-10 prommer use FPS10_USB or FPS10_TCP drivers,
depending on connection type. When using DAU-9S select FBUS).
iii From the File menu, choose product: File -> Choose Product -> xx-x* (* = type designator of the
phone, eg. RM-249/250), or press Ctrl + R to scan product.
iv From the toolbar, set operating mode to “Local”.
5. EGSM850/900/1800/1900 troubleshooting
iFrom the Testing menu, activate the
ii In the
• Select band.
• Set Active unit to “Rx” (Default ).
• Set Operation mode to “Burst” (Default).
• Set Rx/Tx channel (see table below).
• Apply a frequency (see table below) to the RF-connector.
RF Controls
window:
RF Controls
Phoenix service software
window: Testing -> GSM -> RF Controls .
.
Note: Remember to compensate for cable attenuation, specific for MJ-140. You will find the values
in the Service tools section.
Apply a signal to the RF-connector (remember to compensate for cable attenuation). See values in
RSSI signal measurement is the main Rx troubleshooting measurement. The test measures the strength of
the received signal.
I and Q branches can be measured separately. In GSM, the input signal can be either a real GSM signal or a
CW (Continuous Wave) signal that is 67.71 kHz above the carrier frequency.
Steps
1. Start
2. Choose Testing→GSM→RSSI Reading .
3. Set the RF signal generator for a channel frequency +67.71 kHz in CW mode with a –80 dBm signal level.
4. In the
Phoenix
Alternatively set the cellular tester downlink channel to the appropriate channel. Make sure that the tester
is set to continuous mode, not to burst mode.
RSSI Reading
service software.
window, select the appropriate band and channel.
Figure 16
5. To start the measurement, activate GSM Rx chain, click Start.
RSSI Reading
window
Results
RSSI reading values of the selected band and channel are displayed. The RSSI level must be the same value
as that which is set at the signal generator (-80 dBm).
Transmitter troubleshooting
General instructions for TX troubleshooting
Context
• Tx troubleshooting requires Tx operation.
• Do not transmit on frequencies that are in use!
• Transmitter can be controlled in the local mode for diagnostic purposes.
• The most useful Phoenix tool for GSM transmitter testing is "RF Controls".
RM-249; RM-250
RF Troubleshooting and Manual Tuning Guide
• Tx IQ tuning and Tx power tuning can be also used in some cases.
• Remember that retuning is not a fix! Phones are tuned correctly in production.
The first set of steps instructs how to assemble the test setup. This setup is general for all Tx troubleshooting
tasks.
Alternative steps provide specific troubleshooting instructions for
Caution: Never activate the GSM transmitter without a proper antenna load. There should be always
50 Ω load connected to the RF connector (antenna, RF-measurement equipment or at least 2 W
dummy load), otherwise the GSM Power amplifier may be damaged.
Phoenix
service software.
Steps
1. Connect a test jig to a computer with a DAU-9S cable or to a FPS-10 flash prommer with a modular cable
(XCS-4).
Make sure that you have a PKD-1 dongle connected to the computer's parallel port.
2. Connect CU-4 with 12 V supply. The DC supply voltage is set to 3.7 V by default (in Phoenix).
3. Connect an RF cable between the RF connector of the module test jig (MJ-140) and measurement
equipment or alternatively use a 50 Ω (at least 2 W) dummy load in the module test jig RF connector,
otherwise GSM may be damaged.
Note: There are two antenna connectors in the module jig:
• one for GSM
• one for Bluetooth
Make sure that all connections are made to the correct RF connector.
Normally a spectrum analyser is used as measurement equipment.
Note: The maximum input power of a spectrum analyser is +30 dBm.
To prevent any damage, it is recommended to use 10 dB attenuator on the spectrum analyzer input.
4. Set Tx on.
iSet the phone module to the test jig and start
iiInitialize connection to the phone. (With the FPS-10 prommer use FPS10_USB or FPS10_TCP drivers,
depending on connection type. When using DAU-9S select FBUS driver).
iii From the File menu, choose product: File -> Choose Product -> xx-x* (* = type designator of the
phone, e.g. RM-249/250), or pressCtrl + R to scan product.
iv From the toolbar, set operating mode to “Local”.
5. GSM850/900/1800/1900 troubleshooting
iFrom the Testing menu, activate the
RF Controls
Phoenix service software
window: Testing -> GSM -> RF Controls .
.
ii In the
• Select band "GSM850", “GSM900” or “GSM1800” or “GSM1900”.