BBK X31 User manual

service manual
X31(RU)

Catalog
Chapter One About Maintenance
1.1 Safety precautions
1.1.1 Precautions for antistatic
1.1.2 About placement position
1.2 Maintenance method
1.2.1 Visualized method
1.2.2 Electric resistance method
1.2.3 Voltage method
1.2.4 Current method
1.2.5 Cutting method
1.2.6 Element substitution method
1.2.7 Comparison method
1.3 Required device for maintenance
Chapter Two Functions and Operation Instructions
2.1 USAGE INTRODUCTION
2.1.1 FUNCTIONS AND FEATURES
2.1.2 BUTTONS AND JACKS ILLUSTRATION
2.1.3 MAIN MENU ILLUSTRATION
2.1.4 PLAYING INTERFACE ILLUSTRATION
2.2 BASIC OPERATIONl
2.2.1 INSTALL USB DRIVE PROGRAM
2.2.2 USE MOBILE STORAGE FUNCTION
2.2.3 DISCONNECT USB SAFELY
2.2.4 BROWSE/CANCEL FILE
2.2.5 PLAY MUSIC
2.2.6 A-B REPEAT FUNCTION
2.2.7 RECORDING
2.2.8 TUNING
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2.3 SETTINGS
2.3.1 SETTINGS
2.3.2 PLAY MODE
2.3.3 EQ SELECT
2.3.4 SLEEP
2.3.5 PLAYLIST
2.3.6 FM CHANNEL
2.3.7 LOCK SETUP
2.3.8 SCREEN SAVE
2.3.9 ADVANCED
2.4 SPECIFICATION
Chapter Three Servicing and Principle
section One Principle of the Player
3.1.1 Function introduction
3.1.2 Block diagram of the player
3.1.3 Introduction to IC used by the player
Section Two Unit Circuit Principle
3.2.1 FLASH circuit principle
3.2.2 FM tuning circuit
3.2.3 OLED module circuit
3.2.4 Buttons circuit
3.2.5 Headphone jack circuit
3.2.6 Charge control circuit
3.2.7 Battery protection circuit
3.2.8 Power circuit
3.2.9 Reset circuit
3.2.10 Power on/off circuit
3.2.11 Microphone circuit
Section Three Servicing Cases
3.3.1 Servicing cases
3.3.2 Troubleshooting flow chart
Section Four Waveform diagram
Section Five Function Introduction to IC
3.5.1 Function introduction to PNX0102AEX
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3.5.2 Function introduction to K9F4G08U0M
3.5.3 Function introduction to TPS79301
3.5.4 Function introduction to G690L263T71
3.5.5 Function introduction to TPS62200
3.5.6 Function introduction to Lm2713
3.5.7 Function introduction to TEA5767HN
3.5.8 Function introduction to ISL6294IRZ
3.5.9 Function introduction to PIC10F200T
3.5.10 Function introduction to PQ1X281M2ZP
3.5.11 Function introduction to Si1912
Chapter Four Assembly and Disassembly Process
4.1 Disassembly process of the player
4.2 Assembly process for the player
Chapter Cinque PCB board & Circuit diagram
Section One PCB board
Section Two circuit diagram
Chapter six BOM List
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Chapter One About Maintenance
1.1 Safety precautions
1.1.1 Precautions for antistatic
Movement and friction will both bring static electricity which causes serious damages to integrated
IC. Though static charge is little, when a limited quantity of electric charge is added to large-
scaleintegrated IC, as the capacitance is very small in the meantime, now the integrated IC is very much
easy to be struck through by static electricity or the performance will decrease. Thus static electricity
prevention is of extraordinary importance. The following are several measures to prevent static
electricity:
1. Use a piece of electric conduction metal with the length of about 2 metres to insert into the earth,
and Fetch the lead wire from the top of the surplus metal and connect to the required static electricity
device. The length and depth of the metal embedded under the earth should be determined according to
the wettability of the local soil. For humid places, it may be shorter, and longer and deeper for dry places.
If possible, it can be distributed and layed in terms of “#” shape.
2. On operating table-board, the antistatic table cushion should be covered and grounded.
3. All devices and equipments should be placed on the antistatic table cushion and grounded.
4. Maintenance personnel should wear antistatic wrist ring which should be grounded.
5. Places around the operating position should also be covered with electric conduction cushion or
Painted with antistatic paint.
1.1.2 About placement position
1. Audio power amplifier cannot be installed in places with high temperature and humidity.
2. Positions for placement should be stable and secure.
1.2 Maintenance method
1.2.1 Visualized method
Directly view whether abnormalities of collision, lack of element, joint welding, shedding welding,
rosin joint, copper foil turning up, lead wire disconnection and elements burning up among pins of
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Elements appear. Check power supply of the machine and then use hands to touch the casing of part of
elements and check whether they are hot to judge the trouble spot. You should pay more attention when
using this method to check in high voltage parts.
1.2.2 Electric resistance method
Set the multimeter in resistance position and test whether the numerical value of resistance of each
point in the circuit has difference from the normal value to judge the trouble spot. But in the circuit the
tested numerical value of resistance is not accurate, and the tested numerical value of integrated IC's
pins can only be used for reference, so the elements should be broken down for test.
1.2.3 Voltage method
Voltage method is relatively convenient, quick and accurate. Set the multimeter in voltage position
and test power supply voltage of the player and voltage of a certain point to judge the trouble spot
according to the tested voltage variation.
1.2.4 Current method
Set the multimeter in current position and test current of the player of a certain point to judge the
trouble spot. But when testing in current method, the multimeter should be series connected in the
circuit, which makes this method too trivial and troublesome, so it is less frequently used in reality.
1.2.5 Cutting method
Cutting method should be combined with electric resistance method and voltage method to use.
This method is mainly used in phenomena of short circuit and current leakage of the circuit. When
cutting the input terminal voltage of a certain level, if voltage of the player rises again, it means that the
trouble lies in this level.
1.2.6 Element substitution method
When some elements cannot be judged good or bad, substitution method may de adopted directly.
1.2.7 Comparison method
A same good PC board is usually used to test the correct voltage and waveform. Compared these
data with those tested through fault PC board, the cause of troubles may be found.
Through the above maintenance method, theoretical knowledge and maintenance experience, all
difficulties and troubles will be readily solved.

1.3 Required device for maintenance
Audio Generator
Digital oscillograph ( 100MHE)
SMD rework station
Multimeter
Soldering iron
Pointed-month pincers
Cutting nippers
Forceps
Electric screw driver
Terminals connecting cord
Headphone
Microphone
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Chapter Two
Functions and Operation Instructions
2.1 USAGE INTRODUCTION
2.1.1 FUNCTIONS AND FEATURES
#Philips PNX0102 audio decode chip
Adopt famous Plilips PNX0102 audio decode chip, special for Hi-Fi Mp3 player, forcefully making
up audio signal loss when compressing Mp3 to revert audio signal better.
#Play MP3/WMA/WAV files
Support 16kbps~320kbps Mp3 file and 8kbps~192kb0s WMA file.
#Mobile storage function
Capable of downloading files form Windows resource manager.
#FM tuning
Full-auto, automanual and manual scanning function may listen to FM radio station program more
easily.
#Voice recording function
May be used to record in class, meeting and interview.
#USB 2.0 transmission(high speed)
USB 2.0 high speed data transmission.
#Support firmware upgrading function
Support upgrading function. You may add new function to the built-in program of this player
conveniently.
2.1.2 BUTTONS AND JACKS ILLUSTRATION
#Press in power off mode
#Press for long in power on mode
#Press in playback interface
#Press when recording
#press when tuning
#press in tuning SCAN mode
#press when operating in menu
#Press in playback interface
#Press for long in playback interface
power on
power off
switch in pause/play
pause recording
mute
save radio station and switch mode to PRESET
enter selected item or confirm setup
the previous/next track
fast backward/forward
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#Press in tuning PRESET mode
#Press for long in tuning PRESET mode
#Press in tuning SCAN mode
#Press for long in tuning SCAN mode
#When operating in menu
#Press or for long in “My EQ”
Press when playing
#Press for long in any mode
#Press when tuning
#Press for long when recording
#Press when operating in menu
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#Press in playback interface or when tuning
#Press in "My EQ"
#Press "-" button when browsing file
#Press "+" button for long when tuning
USB/headphone jack
MIC:microphone
select channel
full auto scanning
manual scanning
automanual scanning
move cursor or set item
select the frequency point you want
to set
enter main menu
switch in PRESET and SCAN mode
quit recording
not save the setup and return to the
previous menu
Set A-B reread
adjust volume
adjust dB value
enter cancelling file dialogue box
enter FM recording
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Playback state
Serial number of the current track
Number of all tracks
Sound effect mode
Playback mode
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Battery capacity
Id3 information/singer/lyrics display
Time that has been played of the current track
Spectrum of the currenttrack
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2.1.3 MAIN MENU ILLUSTRATION
#My music
Memorize music file.
#My Voice
Memorize microphone recording file, such as meeting, classroom and interview recording, etc.
#Resume Play
Select "Resume Play" and the player begins to play from the position that music stopped playing
last time.
#REC
Select "REC"to enter recording mode .
#FM Radio
Select " FM Radio"to enter radio setmode.
#System Setup
Select " System Setup" to set system items.
2.1.4 PLAYING INTERFACE ILLUSTRATION
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PRESET mode (normal receiving)
Battery capacity
Frequency of the current radio station
PRESET channel display
SCAN mode (scanning)
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Name of recorded file
Battery capacity
Time that has been recorded
The left recordable time
Recording state
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As for the name of recorded file"V001.WAV":
001 is serial number of the current recorded
track and arranged according to sequence; WAV
is file format after recording
2.2 BASIC OPERATION
2.2.1 INSTALL USB DRIVE
PROGRAM
If your computer is Windows 98, you must
install drive program if you want to use the
mobile storage function of MP3 player in
computer.
1. Place USB drive disc into CD-ROM driver of
computer.
2. Connect MP3 player to computer, and the
computer will automatically indicate that new
firmware device has been found, and run the
installation guide, shown as the following
figure. You only need to find the drive
information file on disc according to prompt
information to finish the installation of drive
program.
3. After installation finishes, restart the computer
and you may use the mobile storage function
normally.
Shown as the following figure:
2.2.2 USE MOBILE STORAGE
FUNCTION
This player can be used as mobile storage
in Windows ME/2000/XP operating system. In
Windows 98SE and Mac operating system, drive
program must be installed firstly and then used
as mobile storage.Connect MP3 PLAYER and
computer with USB transmission line. After the
bottom right corner of desktop appears “ ”
symbol, the mobile storage function of Mp3
PLAYER may be used normally.
NOTE:
#To avoid abnormality of the player appears, you
are suggested to power off firstly before
connecting MP3 PLAYER with computer, and
then use USB transmission line to connect
MP3 PLAYER, then connect computer.
#In Windows 98 system, there is no “ ”symbol.
2.2.3 DISCONNECT USB SAFELY
After operation finishes, click " " symbol
on bottom right corner of Windows desktop
with right button of mouse, and disconnect USB
safely according to the computer prompt.
2.2.4 BROWSE/CANCEL FILE
#BROWSE FILE
In any case, press button for long to
enter "Main Menu". Music fileand recording file
are separately saved in the first two items of
main menu, "My Music" and "My Voice".
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