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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- 2 -
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
#
#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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3
4
5
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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4
5
PRESET mode (normal receiving)
Battery capacity
Frequency of the current radio station
PRESET channel display
SCAN mode (scanning)
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2
3
4
5
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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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/
PRESS
FOR LONG
PRESS
PRESS
/
PRESS
PRESS
Press button to select upward or
downward and then press button to enter
files browsing .
#CANCEL FILE
When browsing files, press button and
the cancel dialogue box will pop up.
Press button to select "YES" and
then press button to cancel the file. Select
"NO" or press button to exit.
PRESS
/
2.2.5 PLAY MUSIC
#PLAY MUSIC
Press button to select song In”My
Music". Press button or select playback in
main menu to begin playing music, meanwhile
the playback interface displays.
#PAUSE PLAYING MUSIC
When playing, press button to switch to
pause state. Press button again to
continue playing.
#NEXT and PREV
When playing, pressing button may skip
to the next track to play. If playback time of the
current track is less than 5 seconds, pressing
button may skip to the previous track to play,
otherwise the current track will be played again if
playback time is more than 5 seconds.
#FF and FB
When playing, pressing button for long
may realize fast forward.
PRESS
FOR LONG
PRESS
FOR LONG
When playing, pressing button for long
may realize fast backward.
CAUTION:
Fast forward and fast backward operation
are only for the current track. After fast
backward/forward to the beginning/ending of
track, it switches into normal playback
automatically.
#ADJUST VOLUME
When playing or tuning, pressing
button or for long may adjust volume. The
display of adjusting volume in music playback
interface is shown as follows:
/
CAUTION:
2.2.6 A-B REPEAT FUNCTION
When playing, if you want to listen to a
certain segment repeatedly, please use A-B
repeat function.Press button for the first time
to select the beginning point that you desire to
repeat play and screen displays " ";press it for
the second time to select the ending point that
you desire to repeat play and screen displays "
“,and system begins to repeat play between
A-B segment. Press button for the third time
to cancel repeat and continue to play.
#Music playback will be paused when browsing
file.
#In some operating system (such as complex
font Windows), the operation of copying
lyrics/song file and changing song's name may
probably lead to incorrect display.
When playing WMA songs of VBR, pressing
buttons may probably has slow response or has
no lyrics display. When playing some non
standard songs or songs with special format,
noise may probably occur.
PRESS PRESS PRESS
PRESS
FOR LONG
PRESS
2.2.7 RECORDING
When recording, press button to pause
and press button for long to exit recording
and then make files.
#To avoid sudden power-off when recording, you
cannot record when in low battery and when
disc is fully written. If you are recording, it
indicates "FULL DISC" and exits recording.
#When recording with microphone, if you press
buttons and the sound of pressing may
probably be recorded.
2.2.8 TUNING
#ENTER TUNING MODE
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PRESS
Select "FM Radio" in main menu and press
Button to listen to radio.
#EXIT TUNING MODE
When listening to radio, press button for
long to return to main menu.
#PRESET/SCAN MODE SWITCH
When listening to radio, press button to
switch between PRESET and SCAN mode.
1. PRESET mode
#ADJUST CHANNEL
Press button to enter the next channel,
and press button to enter the previous
channel.
#FULL AUTOSCANNING
In PRESET mode, press button
for long to begin full auto scanning. All scanned
radio stations will be saved in PRESET channel
automatically.
PRESS
FOR LONG
/
2. SCAN MODE
#MANUAL/AUTOMANUAL SCANNING
Press button to increase 0.1MHz each
time; and press button to decrease 0.1
Mhz each time. Press button to save radio
station.
Press button for long to increase
frequency continuously and stop until radio
station
has been searched. Press button to save
radio station.
Press button for long to decrease
frequency continuously and stop until radio
station has been searched.
Press button to save radio station.
#SAVE RADIO STATION
Select channel in PRESET mode firstly, and
then switch to SCAN mode to adjust fre quency
(manually or auto manually). After scanning
desired frequency, press button to save
into the current PRESET channel.
PRESS
/
PRESS
FOR LONG
#CAUTION:
In the course of full auto/automanual
scanning, press or button to stop
scanning.
#FM RECORDING
When listening to radio , press button for
long to enter FM recording . Press button for
long to stop recording and generate into
recording file. The generated file of FM recording
is wav format.
2.3 SETTINGS
2.3.1 SETTINGS
#Play Mode
Normal
Shuffle
Playlist
Intro
REP One
REP ALL
REP DIR
#EQ Select
Normal
PURE
POP
Clas
Jazz
Rock
Dbass
Disco
My EQ
#Sleep
Disable~120Min
#Playlist
Browse
Edit
Delete
#FM Channel
Auto
Mono
#Lock Setup
Lock Disable
Lock Enable
#Screen Save
Disable~5Min
#Advanced
My EQ
REC Set
Format
Load Default
System Info
Language
PRESS
PRESS
2.3.2 PLAY MODE
The playback symbol displays on playback
interface is shown as follows:
:play according to track sequence.
:random play any one track.
:play the track edited in program list.
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browse play each track for 10 seconds.
repeat play single track.
repeat play all tracks.
repeat play all tracks in this Folder.
CAUTION:
#Play mode is defaulted to "Normal" each time
when power on.
#Files in "My Voice" only support sequence
playback.
#When playing files in "My Voice", there is no
"Play mode" item.
2.3.3 EQ SELECT
Press button to enter "EQ SELECT",
and then use to move cursor, shown
as follows:
NORMAL
POP
CLAS
JAZZ
ROCK
DBASS
DISCO
My EQ
PURE
/
PRESS
The corresponding icons of each EQ mode
in playback mode are shown as follows:
Select "MY EQ", and correspond with the
sound effect that you have preset in "MAIN
MENU->SYSTEM SETUP->ADVANCED". If you
have not set it, it defaults "MY EQ" to NORMAL"
sound effect.
When the cursor moves to a certain sound
effect mode, the sound effect mode played by
MP3 player will switch to that in the cursor for the
moment to facilitate you to select your desired
sound effect mode. Press button to confirm
this sound effect mode.
CAUTION:
When playing files in "REC", there is no "EQ
SELECT" item.
2.3.4 SLEEP
Press or button to adjust the timing
power-off time. After setup finishes, press
button to save and then exit,and press button
not to save and then exit. If timing power off time
is 15 minutes, after 15 minutes, MP3 PLAYER
will power off automatically.
PRESS
PRESS
PRESS
CAUTION:
#It is defaulted to be invalid each time when
power on.
#Timing power-on time is a rough time, and may
have difference.
2.3.5 PLAYLIST
#Browse
Select "Browse" , and you may check how
many songs have been program-med into
playlist. When browsing play list. Pressing
button may begin playing.
Note:
Playback will be paused when in "Browse"
or "Edit list".
#Edit
PRESS
PRESS
PRESS PRESS PRESS
As in the above illustration, enter "Edit" and
browse files.The icon before songs in the playlist
is " ". Select a song not in the playlist and
press button to add it intothe list. Select a
song in the playlist ,and press button to
cancel it from the playlist You can add 15 songs
into the playlist at most.
#Delete
Select "Delete". After dialogue box pops up,
select "YES", and press button to confirm
and the playlist is cleared.
NOTE
#If the operation of adding or cancelling music
files is detected, MP3 PLAYER will clear
the playlist automatically.
2.3.6 FM CHANNEL
#You cannot enter "Edit list" and "Clear list"
when in program playback.
You can select the FM channel in settings.
When select Auto, it changes the channel
automatically. When select Mono, it tunes at
Mono channel all the time.
PRESS
2.3.7 LOCK SETUP
Entering this menu may open or close auto
buttons lock function. If “Lock Enable”is selected
and not any button is operated during 30
seconds, all button functions will be locked
automatically.
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PRESS
CAUTION:Lock is only effective in playback,
recording and tuning modes.
2.3.8 SCREEN SAVE
Press or button to adjust the
screen saver time. After setup finishes, press
button to save and then exit,and press button
not to save and then exit. If the screen saver
setup time is 3 minutes and no operation occurs
within 3 minutes, MP3 PLAYER will enter screen
saver state automatically.
PRESS
PRESS
PRESS
2.3.9 ADVANCED
Advanced items include some other system
internal setup, such as user sound effect setup,
default setup and system information.
PRESS
PRESS
PRESS
#My EQ
In "My EQ" interface, you may see the
decibel (dB) of each frequency.
If you want to adjust the decibel of mediant
(1k HZ), operate according to the below
illustration.
When adjusting width, take 3dB as a step
and the max adjustable range is 15dB. After
setup finishes, press button to confirm and
exit, and press button to exit with the original
setup not being changed.
#REC Set
Here to set the recording quality ,The
recording quality is higher, the sound quality is
better and the used space is more. Three kinds
of recording quality adopt IMA-ADPCM
format coding.
/
PRESS
PRESS
PRESS
#Formatting
Enter this menu, and you may format hard
disk. When dialogue box pops up, press
button to move cursor to “YES”, and then press
button to confirm to finish formatting
operation.
PRESS
PRESS
#Default
If you want to restore MP3 PLAYER to
factory setup state (data and song files cannot
be cancelled), you may select “Load Default”.
After dialogue box pops up, select “YES” , press
button to confirm and then exit to restore to
default state. Select “NO” or press button to
cancel.
CAUTION:
Restore to "Default" state is effective only
when power on again.
#System Info
You may find information of firmware
version, total disc capacity and left disc capacity.
In system information menu, press button to
return to the previous menu.
CAUTION:
Because firmware will use some space, the
displayed content capacity may probably be
different from the actual capacity.
#Languages
Russian and English are supported.
PRESS
#Upgrade
Download the latest firmware upgrading file
from BBK website firstly, such as "BBK_X31RU.
ebn" and "X31RU_Resource.bin", copy the two
files into MP3 PLAYER at the same time, and
then power on again. Find "Upgrade" item in
"ADVANCED" of "SETTINGS", and pressing
button may start upgrading. After upgrading
finishes, MP3 PLAYER will power on again.
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2.4 SPECIFICATION
PRESS
NOTE
#Only Mp3 player detects that there is upgrading
file in system when this player power on,
"Upgrade" menu will appear in "ADVANCED"
item.
#Make sure Mp3 PLAYER has enough quantity
of electric charge before upgrading.
#To ensure successful firmware upgrading, do
not power off during the course of upgrading.
#Upgrading will last for 10 seconds or more,
please try your best not to operate other
buttons during this course.
#After firmware upgrading finishes, some
function or interface may probably be different
from user manual, so please take real object
as standard.
Model
Audio decode chip
Lithium battery
Continuous playback
time
Dimensions/weight
Audio SNR
Headphone out
Frequency range
FM tuning range
Working temperature
Files supported
57.4mm 36.5mm 12.5mm about 23.1g
3.7V 170mAh
The longest time is about 7 hours
X31
Philips PNX0102
90dB
9mW+9mW(320hm impedance)
0~40
18Hz~20kHz
87.5MHz~108MHz
MPEG 1/2 Layer 3(16kbps~320kbps) WMA(8kbps~192kbps) WAV
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32.768K
CRASTAL FM MODULE
PNX 0102
LDO MODULE
BUTTON ARRAY
MICROPHONE
USB INTERFACE
ANTI-POP CIRCUIT
IMPEDANCE MATCH
3.0V VOLTAGE
2.8V
VOLTAGE
1.8V
VOLTAGE
HEADPHONES
RESET CIRCUIT
12M CRYSTAL
NAND
FLASH MEMORY
OLED MODULE
3V-12V DC-DC
CONVERTER
3.1.1 Function introduction
1. Mp3 main decode chip, which adopts professional MP3 decode chip PNX0101 of Philips
company, with integrated ARM and DSP core inside. Sound quality is good and power consumption is
low.
2. USB jack circuit: USB jack, data exchange.
3. Flash circuit: data storage of the player.
4. OLED circuit: display of working state of the player.
5. MIC circuit: external audio input, record function finishes.
3.1.2 Block diagram of the player
Block diagram of the player is shown in the figure 3.1.2.1:
Chapter Three Servicing and Principle
Section One Principle of the Player
Figure 3.1.2.1 blockdiagram
USB INTERFACE
RECHARGE
CIRCUIT
LI-ON BATTERY
POWER
MANAGEMENT
1.8V
DC-DC
3.3V
DC-DC
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3.1.3 Introduction to IC of the player
Introduction to IC of the player is shown as in the following table:
IC model IC model Function
TPS79301 U1 Precision voltage stabilizer
G690L263T71 U2 Reset IC
TPS62200 U3 Precision voltage stabilizer
ISL6294IRZ U4 Charge management
PIC10F200T U5 Voltage detect
PNX0102AEX U6 MP3 decode
PQ1X281M2ZP U7 Precision voltage stabilizer
K9F4G08U0M U8 Flash
SI1912 U9, U10 Dual MOS tube
LM2703 U11 12V boost
TEA5767HN FU1 TuningIC
- 13 -

3.2.1 FLASH circuit
1. FLASH circuit schematic diagram is shown in the figure 3.2.1.1:
Figure 3.2.1.1 Flash circuit schematic diagram
2. Working principle: Flash Memory is the storage unit of the player, all Mp3 and waveform files
should be stored in FLASH. Flash module is composed of FLASH chip K9F2G08U0M and peripheral
circuit to finish internal files’s working of read, write and delete. 3.3V volatge circuit provides 3.3V
voltage for FLASH working. R38 is pull up resistor of /CE, R48 is the pull down resistor of /WP, Vcc is
power supply pin of FLASH, /CE is chip selection signal, high level is effective, VCC33 provides 3.3V
voltage and FLASH begins to work./RE, /WE are read effective and write effective signal end
respectively to control read and write function of FLASH. I/O1 - I/O8 are 8 data lines to complete the
exchange of FLASH and external data to realize functions of write, delete and edit of Mp3.
Section Two Unit Circuit Principle
R38 100K
/WP
VCC33
D_GND
D_GND
D_GND
D_GND
R48
100K
/RE
D_GND
L13 601
C47
104 X5R
C48
104 X5R
U8 K9F2G08U0M-YCBO
NC
1
NC
2
NC
3
NC
4
NC
5
GND
6
RY/BY
7
RE
8
CE
9
NC
10
NC
11
Vcc
12
Vss
13
NC
14
NC
15
CLE
16
ALE
17
WE
18
WP
19
NC
20
NC
21
NC
22
NC
23
NC
24
NC 48
NC 47
NC 46
NC 45
I/O8 44
I/O7 43
I/O6 42
I/O5 41
NC 40
NC 39
NC 38
Vcc 37
Vss 36
NC 35
NC 34
NC 33
I/O4 32
I/O3 31
I/O2 30
I/O1 29
NC 28
NC 27
NC 26
NC 25
MPMC_AD7
MPMC_AD5
MPMC_AD2
MPMC_AD6
MPMC_AD1
MPMC_AD0
MPMC_AD4
MPMC_AD3
FLASH3V3 FLASH3V3
/CE
/WE
CLE
ALE
- 14 -

When Mp3 is powered on, 3.3V voltage supplies power for Flash through Vcc, /CE inputs 3.3V high
level signal and Flash begins to work effectively. When Mp3 laying music,/RE is high level, Flash
performs read operation. When writing files in through data line o recording through microphone, /WE is
high level, Flash performs write in operation. Working of read out and write in are performed through
I/O1~I/O8 8 data/address lines.
3.2.2 FM tuning circuit
1. FM tuning circuit diagram is shown in the figure 3.2.2.1;
FC1 101 NPO
XT1
32.768KHz
FC17 223 X7R
FC18 102 X7R
FR7 22R
D-GND
SGND
IIC_SCL2
D-GND
LLQ1608-AR10G
COILCRAFT
MURATA
OR 13MHz
D-GND
CRYSTAL
TOKO SMD
O603CS
FM_ANT
NECTAR-I
SGND SGND SGND SGND
SGND
SGND
SGND SGND SGND
D-GND
D-GND
FM_3V3
FM_3V3
FM_3V3
FD2
BB202
FD1
BB202
FR5 100K
FR6 33K
FC15 22PF
FC14 102 X7R
FL3 33nH 2%
FL1 120nH 2%
FL2 33nH 2%
FC19 104 X5R FR60
601
FM_OUTR FM_OUTL
FR61
601
IIC_SDA
2
FC10 393 X5R
FC9 333 X5R
FC12 333 X5R
FC6 473 X5R
FC7 473 X5R
FC8 473 X5R
FC16 223 X7R
FC11
103 X7R
FU1
TEA5767HN
N.C
1
N.C40
CPOP
2
VCOT1
3
VCOT2
4
VCOVCC
5
DGND
6
DVCC
7
DATA
8
CLOCK
9
N.C
10
W/R
11
BUSM
12
BUSEN
13
SWP1
14
SWP2
15
XTAL1
16
XTAL2
17
PDLF
18
PHLF
19
N.C
20
N.C 21
LAVO 22
RAVO 23
TMUTE 24
MPXO 25 VREF 26
TCIFC 27
DIFL1 28 DIFL2 29
N.C 30
N.C31
IFGAI32
AGND33
AVCC34
RFI135
RFGND36
RFI237
TCAGC38
LOOPSW39
FR1 10R
FC5 475/X5R/6.3V
FR2 18K 1%
FC4 47PF NPO
FC2 27PF NPO
FC3
472 X7R
FR3 10K
dandu
SGND
FM_ANT3
FM_3V3
FC13
104 X5R
FR4 22R
Figure 3.2.2.1 FM tuning circuit diagram
- 15 -

2. Working principle: tuning circuit is composed of micro digital tuning IC TEA5767HN of Philips
company and peri
When MP3 player switches to FM tuning state, pin 13 BUSEN of TEA5767HN receives high level
signal, bus control mode is gated, IC begins to work. As antenna, headphone receives FM signals from
nature, through antenna input matching circuit, input TEA5767HN, PNX0101 via RFI1 and RFI2 to
control TEA5767HN to perform intermediate frequency and selected frequency control through IIC_SCL
and IIC_SDA to transform FM signals to sound simulating signals and then is outputted by FM_OUTR
and FM_OUTL to ADC circuit of PNX0101 and then output through headphone after DAC processing.
3.2.3 OLED module circuit
1. OLED module circuit is shown in the figure 3.2.3.1:
pheral circuit. Power supply voltage is supplied by PQ1X28 to provide pure voltage
with value 2.8V for IC. FC1, FC2, FC3, FC4 and Fl1 are antenna input matched circuit of FM module;
variable diode Fd1, Fd2 and winding inductor is tuning circuit in FM module. Control of FM adopts IIC
bus control means, 8, 9 of TEA5767 are data line and control line.
C65
475/X5R/6.3V
CN5
NC
21
GND
1VDD 2BS1 3BS2 4
RES#
6D/C# 7WR# 8RD# 9D0
10D1 11D2 12D3 13D4 14
D6
16D7 17IREF 18VCOMH 19VCC 20
CS#
5
D5
15
C67
16V/104/X5R
D8
MBR0520/SOD123
GND
C64
106/25V/1206
VOLED
VCC33
LCD_DB02 LCD_DB22 LCD_DB12 LCD_DB52 LCD_DB62 LCD_DB42 LCD_DB32 LCD_DB72
LCD_RD2
LCD_WR2
LCD_D/C2
LCD_CS
2
L30
0R
C63
22PF NPO
L24
CDRH3D16-4R7
GND
R47 4.7K
U11
TPS61040/LM2703
EN
4
VIN
5
FB 3
GND 2
SW 1
R72
0R
P_VDD
R74 0R
LCD_RESET2
L23
601
C60
103 X7R
R66
2M
LCD_3V3
C62
104 X5R
EN2
2
R70
240K 1%
VOLED
R69 100K
R76
27K 1%
R46 4.7K
2. Working principle: 12V high voltage is required to lighten OLED and matching circuit must be
matched to finish. The circuit includes two parts: boosted circuit and OLED jack circuit, in which boosted
circuit is constituted by boosted DC-DC LM2703 and peripheral circuit, VIN is power input, EN is
Lm2703 enable end, high level is effective, SW is high voltage output pin, FB is feedback pin,
voltageValue VOLED outputted by high voltage is achieved through selecting two voltage partial resistor
on two ends of FB, and the following relation is met:
Figure 3.2.3.1 OLED circuit schematic diagram
- 16 -