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 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.
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-509; RM-510; RM-511
Nokia 3710 fold; Nokia 3711 fold; L3&4 Service Manual
Structure
Nokia 3710 fold; Nokia 3711 fold; L3&4 Service Manual Structure
1 General information
2 Service Devices and Service Concepts
3 BB Troubleshooting and Manual Tuning Guide
4 RF Troubleshooting
5 System Module
6 Service information differences between RM-511 and RM-509
Glossary
Product features and sales package.....................................................................................................................1–6
Product and module list ........................................................................................................................................1–7
Mobile enhancements............................................................................................................................................1–7
General specifications.................................................................................................................................... 1–11
Table 3 Data ......................................................................................................................................................... 1–10
Table 4 Music ....................................................................................................................................................... 1–10
RM-509/RM-510 is a WCDMA/GSM handportable phone with a fold form factor and integrated GPS (A-GPS OMA
SUPL with 3GPP assistance). RM-509 supports EGSM 850/900/1800/1900 and WCDMA 900/1700-2100/2100
bands and RM-510 supports EGSM 850/900/1800/1900 and WCDMA 850/1900/2100 bands. The device
supports GPRS/EGPRS and WCDMA 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).
For GPRS/EGPRS networks the device is a Class B EGPRS MSC 32 (5 Rx + 3 Tx, max sum 6), which means a
maximum downlink speed of 296 kbit/s and uplink speed of 177.6 kbit/s. The device also supports Dual
Transfer Mode (DTM) for simultaneous voice and packet data connection in GSM/EDGE networks; simple class
A, multi slot class 11, (4 Rx + 3 Tx, max sum 5 ), downlink speed of 177.6 kbit/s and uplink speed of 118.4
kbit/s.
The device is an MMS (Multimedia Messaging Service) enabled multimedia device. The MMS implementation
follows the OMA MMS standard release 1.2. The device also supports Bluetooth 2.1 standard with the stereo
audio profiles.
The device has a large 2.2’’ QVGA (320 x 240 pixels) TFT main display with 16 million colours, and a hiddenuntil-lit secondary monochrome display (128 x 160 pixels). It also has a 3.2 Megapixel EDOF main camera
with LED flash and secondary camera for video calls.
The device supports the S40 Compact UI and S40 OSS web browser, which brings desktop-like Web browsing
experience to mobile devices.
The device 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.
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
submerge 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.
RM-509; RM-510; RM-511
Service Devices and Service Concepts
Table of Contents
Service devices........................................................................................................................................................2–5
Product specific devices....................................................................................................................................2–5
Using MJ-212 module jig .............................................................................................................................2–6
Rework jigs and stencils...................................................................................................................................2–7
General devices..................................................................................................................................................2–7
Service concepts .................................................................................................................................................. 2–15
POS (Point of Sale) flash concept .................................................................................................................. 2–15
Flash concept with FPS-21............................................................................................................................. 2–16
CU-4 flash concept with FPS-21..................................................................................................................... 2–17
Module jig service concept............................................................................................................................ 2–18
Service concept for RF testing and RF/BB tuning........................................................................................ 2–19
Bluetooth testing concept with SB-6 ........................................................................................................... 2–20
RM-509; RM-510; RM-511
Service Devices and Service Concepts
Service devices
Product specific devices
The table below gives a short overview of service devices that can be used for testing, error analysis, and
repair of product RM-509; RM-510; RM-511. For the correct use of the service devices, and the best effort of
workbench setup, please refer to various concepts.
FS-104Flash adapter
•
FS-104 is equipped with a clip interlock system
•
provides standardised interface towards Control Unit
•
multiplexing between USB and FBUS media, controlled by VUSB
MJ-212Module jig
MJ-212 is meant for component level troubleshooting.
The jig includes an RF interface for GSM and WCDMA. 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
1. Insert the UI-flex to the supporting frame in the MJ-212 module jig as shown in the picture.
Make sure that the coax cable is correctly assembled. Attach the direct cable end to engine side and the
cable end at 90-degree angle to UI side, as shown in the picture below:
Note: Wrong assembly of the coax cable causes a display reset every 3-5 seconds.
RM-509; RM-510; RM-511
Service Devices and Service Concepts
2. Assemble the display module to the UI flex in the supporting frame.
Rework jigs and stencils
The table below gives a short overview of service devices that can be used for testing, error analysis, and
repair of product RM-509; RM-510; RM-511. For the correct use of the service devices, and the best effort of
workbench setup, please refer to various concepts.
RJ-230Soldering jig
RJ-230 is a soldering jig used for soldering and as a rework jig for the
engine module.
General devices
The table below gives a short overview of service devices that can be used for testing, error analysis, and
repair of product RM-509; RM-510; RM-511. 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
RM-509; RM-510; RM-511
Service Devices and Service 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.
RM-509; RM-510; RM-511
Service Devices and Service Concepts
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.
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
SRT-6Opening tool
SRT-6 is used to open phone covers.
Note: The SRT-6 is included in the Nokia Standard Toolkit.
SS-46Interface adapter
SS-46 acts as an interface adapter between the flash adapter and
provides standardised interface towards Control Unit
•
provides RF connection using galvanic connector or coupler
•
multiplexing between USB and FBUS media, controlled by VUSB
SS-93Opening tool
SS-93 is used for opening JAE connectors.
Note: The SS-93 is included in Nokia Standard Toolkit.
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-509; RM-510; RM-511. 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
RM-509; RM-510; RM-511
BB Troubleshooting and Manual Tuning Guide
Table of Contents
Baseband self tests in Phoenix .............................................................................................................................3–5
Power and charging troubleshooting..................................................................................................................3–7
Dead or jammed device troubleshooting.......................................................................................................3–7
Power key troubleshooting..............................................................................................................................3–9
General voltage checking troubleshooting ................................................................................................ 3–10
General power checking................................................................................................................................ 3–12
USB charging troubleshooting...................................................................................................................... 3–13
Battery current measuring fault troubleshooting ...................................................................................... 3–14
USB data interface troubleshooting............................................................................................................. 3–23
User interface troubleshooting.......................................................................................................................... 3–24
Keypad and side key troubleshooting ......................................................................................................... 3–24
Hall sensor troubleshooting ......................................................................................................................... 3–31
GPS layout and basic test points................................................................................................................... 3–34
GPS settings for Phoenix................................................................................................................................ 3–34
Bluetooth and FM radio ...................................................................................................................................... 3–39
Bluetooth troubleshooting ........................................................................................................................... 3–39
FM radio troubleshooting.............................................................................................................................. 3–40
Camera module troubleshooting....................................................................................................................... 3–41
Main (back) camera troubleshooting........................................................................................................... 3–41
Taking and evaluating test pictures with main camera ....................................................................... 3–41
Camera troubleshooting........................................................................................................................... 3–42
Camera hardware troubleshooting......................................................................................................... 3–42
Camera flash LED troubleshooting .......................................................................................................... 3–43
Secondary (front) camera troubleshooting................................................................................................. 3–44
Evaluating videocall picture quality from secondary camera .............................................................. 3–44
Secondary camera troubleshooting........................................................................................................ 3–45
If one or more keys are stuck, so that the key does not react when a keydome or the side key is pressed, the
failure is caused by mechanical reasons (dirt, rust, mechanical damage, etc.)
If the failure mode is not clear, start with the Keyboard test in Phoenix.
RM-509; RM-510; RM-511
BB Troubleshooting and Manual Tuning Guide
Display module troubleshooting
General instructions for display troubleshooting
Context
•
The display is in a normal mode when the phone is in active use.
•
Display is in a sleep mode when the phone is in the screen saver mode.
Table 8 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.
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 9 Pixel defects
ItemWhite dot defectBlack dot
defect
1Defect countsRGBWhite Dot
Total
11
Total
1111
2Combined
defect counts
Issue 2COMPANY CONFIDENTIALPage 3 –29
Not allowed.
Two single dot defects that are within 5 mm of each other should be
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
3. Proceed to the display troubleshooting flowcharts.
Use the Display Test tool in
Phoenix
should be able to read the APE ID).
service software.
Phoenix
to find the detailed fault mode.
Display module troubleshooting
Context
The display module consists of two different displays, a main display and a secondary display. The state of
the displays is determined by the state of the phone.
FoldMain displaySecondary display
OpenOnOff
ClosedOffOn
Use the display test tool in Phoenix to find the detailed fault mode.
RM-509; RM-510; RM-511
BB Troubleshooting and Manual Tuning Guide
3. From the Testing menu, select GPS Control. This opens up
figure below, and enables the GPS.
GPS Control
dialogue box, as shown in the
Figure 12 GPS Control dialog box
Select Receiver On to confirm the GPS is enabled and is in idle mode; at this point all clocks should be
present, GPS_En_Reset & SleepX should be high, and Vdd_Dig, Vcc_TCXO & Vcc_PLL will be present.
Receiver On turns on all RF sections of the ASIC and so all LDOs will be on. These checks are part of GPS
basic checks troubleshooting (page 3–37).
GPS Quick Test window
The
GPS Quick Test
is correct and click Start Test. (Select Help for further information).
This test will perform three tests in one; Self Test, Oscillator Test and CW Test, and will provide a Pass/Fail
response. The
troubleshooting (page 3–36).
window has all the necessary functionality for GPS troubleshooting. Ensure the test setup
GPS Quick Test
window also contains a Receiver On button. These checks are part of GPS failure
Figure 13 GPS Quick Test window for GPS troubleshooting
GPS failure troubleshooting
Context
GPS troubleshooting is broken down into two parts: general GPS failure troubleshooting and GPS basic checks
troubleshooting. The GPS failure troubleshooting flow can be followed and, where applicable, will feed into
the GPS basic checks troubleshooting flow.
RM-509; RM-510; RM-511
BB Troubleshooting and Manual Tuning Guide
Camera module troubleshooting
Main (back) camera troubleshooting
Taking and evaluating test pictures with main camera
When
•
•
•
•
•
•
•
•
When
•
•
•
•
•
taking
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
Make sure the optical system is clean
Use highest possible resolution
Make sure the light is sufficient (bright office lightning)
Do not take the picture towards a light source
Hold the phone as still as possible when taking the picture
If camera has auto focus: Pictures should be taken both at infinity ~>2m and at macro distance ~10-15 cm
in order to verify auto focus functionality
evaluating
The center of the picture is sharper than the edges
The image may be blurred, though it does not show in the viewfinder
Analyse the picture from your PC monitor, full colour setting is recommended
If possible, compare with a picture of the same motive taken with a similar Nokia device
If camera has auto focus: Remember that the white focussing frame which appears when the camera
button is pressed halfway down, must turn green for auto focus lock. If the frame turns red, the camera
is not focussed!
RM-509; RM-510; RM-511
BB Troubleshooting and Manual Tuning Guide
•
Do not take the picture towards light source
•
Hold the phone as still as possible when evaluating the video call image quality.
•
Distance should be approximately 40 cm
When
•
•
evaluating
Note: Always use the "troubled" phone when evaluating a picture in a video call. Do not evaluate
the picture on the receiving phone.
The center of the picture is sharper than the edges
If possible, compare with the picture on another Nokia device in a videocall, and of the same motive.
the picture quality of a video call, remember the following:
Secondary camera troubleshooting
Troubleshooting flow
Note: Phone must be in a video call for the secondary camera to be active.
Note: Always use the "troubled" phone when evaluating a picture in a video call. Do not evaluate
RM-509; RM-510; RM-511
BB Troubleshooting and Manual Tuning Guide
Audio troubleshooting
Audio troubleshooting test instructions
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
•
Phoenix service software
•
Battery voltage 3.7V
Test procedure
Audio can be tested using the Phoenix audio routings option. Five different audio loop paths can be activated:
•
External microphone to Internal earpiece
•
External microphone to right Internal handsfree speaker
•
External microphone to left Internal handsfree speaker
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 a table in the following section.
Phoenix audio loop tests and test results
The results presented in this 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.
RM-509; RM-510; RM-511
BB Troubleshooting and Manual Tuning Guide
Measurement data
Figure 14 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 15 Differential output waveform of the Ext_in_IHF_out out loop measurement when speaker is connected.