BBK X17 Service Manual

X17(RU)

service manual

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

2.1.5 Tuning interface illustration

2.1.6 Recording interface illustration

2.2 BASIC OPERATION

2.2.1 Install usb drive program

2.2.2 Install usb drive program

2.2.3 Use mobile storage function

2.2.4 Disconnect usb safely

2.2.5 Browse/cancel file

2.2.6 Play music

2.2.7 Play music

2.2.8 Play music

2.2.9 A-B repeat function

2.2.10 Recording

2.2.11 Tuning

2.2.12 Tuning

2.3 SETTINGS

2.3.1 Settings

2.3.2 PLAY MODE

2.3.3 Eq select

2.3.4 Sleep

2.3.5 3D

2.3.6 Playlist

2.3.7 Playlist

2.3.8 Fm channel

2.3.9 Screen save

2.3.10 Advanced

2.3.11 Advanced

2.3.12 Advanced

2.4 SPECIFICATION

Chapter Three Servicing and Principle

Section One Principle of the Player

3.1.1 Principle of the player

3.1.2 Block diagram of the player

3.1.3 Function introduction to IC used by the player

Section Two Unit Circuit Principle

3.2.1 FLASH circuit

3.2.2 FM tuning circuit

3.2.3 OLED module circuit

3.2.4 USB jack circuit

3.2.5 Buttons circuit

3.2.6 Headphone jack circuit

3.2.7 Reset circuit

3.2.8 Power on/off control circuit

3.2.9 Low voltage detecting circuit

3.2.10 MIC circuit

Section Three Servicing Cases

3.3.1 Servicing cases

3.3.2 Troubleshooting flow chart

Section Four Servicing Parameters

Section Five Function Introduction to IC

3.5.1 Function introduction to PNX0101

3.5.2 Function introduction to G60L263T

3.5.3 Function introduction to TC58512FT

3.5.4 Function introduction to SI1912DL

3.5.5 Function introduction to Lm2703

3.5.6 Function introduction to TEA5767HN

3.5.7 Function introduction to PQ1X28

Chapter Four Assembly and Disassembly Process

4.1 Disassembly process of the player

4.2 Assembly process of the player

Chapter Cinque PCB board & Circuit diagram

Section One PCB board

Section Two circuit diagram

Chapter six BOM List

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

- 1 -

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.

- 2 -

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

- 3 -

Chapter Two

Functions and Operation Instructions

2.1 USAGE INTRODUCTION

2.1.1 Functions and features

#Philips PNX0101audio decode chip

Adopt famous Plilips PNX0101 audio decode chip, special for Hi-Fi MP3 player, forcefully making up audio signal loss when compressing MP3 to revert audio signal better. #Sennheiser headphone MX400)

uild high-quality musical effect. #Support 3D LifeVibes surround stereo sound effect, 9 EQ modes

You may taste heart quaking bass and vivid surround stereo sound effect. #Play MP3/WMA/WAV files

Support 16kbps 320kbps MP3 file and 8kbps 192kbps WMA file. #Mobile storage function

Capable of downloading files from Windows resource manager. #FM tuning function

Auto scanning and auto/manual memory function may listen to FM radio station programs more easily.And you may record FM program into WAV files directly. #Voice recording function

May be used to record in class, meeting and interview. #USB 2.0 transmission (full speed)

USB2.0 full 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

1.11.1

#Press for long in any case #Press in tuning mode #Press in recording mode #Press in menu mode

Enter main menu switch in PRESET and SCAN mode Exit recording enter the selected item or confirm the setup the same as that of button

- 4 -

1.21.2 1.31.3

1.41.4

#Press in Play and tune mode #Press in Menu mode #Press in menu mode

1.51.5

#Press in playback mode #Press for long in playback mode #Press in tuning Preset mode #Press in tuning SCAN mode #Press for long in tuning Preset

mode

adjust volume move cursor or set item cancel and exit, or return to the previous menu

the next/previous track

fast forward/backward select channel manual scanning

full auto scanning

#Press for long in tuning SCAN

mode #Menu mode #Press in menu mode

HOLD button: Push towards arrow to lock buttons; and push toward the opposite direction to unlock.

#Press in power-off mode #Press for long in power-on mode #Press in playback mode #Press in recording mode #Press in tuning mode #Press in menu mode

Automanual scanning Move cursor or set item cancel and exit, or return to the previous menu

power on power off pause playing pause recording pause (mute) enter the selected item or confirm the setup (the same as that of M button)

#Press for long in menu mode #Press in playback mode

nter recording mode A-B repeat

#Press for long when playing

music file(non recording file) #Press in browsing file mode #Press for long in tuning mode

MIC microphone Hanging rope hole Headphone jack USB jack Battery direction

Switch esound effect Delete file Start FM recording

Caution: In my sound effect setup mode, and are left and right cursor, and is exit button.

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

- 5 -

Select " FM Radio"to enter radio mode. #System Setup

Select " System Setup" to set system items.

2.1.4 Playing interface illustration

Play State

Sound effect mode

Playback mode

Repeat state

Battery capacity

2.1.5 Tuning interface illustration

Song name and Singer

Time that has been played

Number of tracks

Spectrum display

PRESET mode (normal receiving)

Frequency of the current radio station

Battery capacity

Frequency bar

PRESET channel display

SCAN mode (scanning)

2.1.6 Recording interface illustration

Name of recorded file

Battery capacity

Time that has been recorded

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

The left recordable time

Recording state

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.

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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:

2.2.5 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". Press

Button to select upward or downward and then press button to enter files browsing .

2.2.2 Install usb drive program

2.2.3 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.

2.2.4 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.

PRESS FOR LONG

PRESS

#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

2.2.6 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.

2.2.7 Play music

#FF and FB

When playing, pressing button for long may realize fast forward.

PRESS

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PRESS FOR LONG

When playing, pressing button for long

may realize fast backward.

PRESS FOR LONG

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.

2.2.8 Play music

#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:

PRESS

PRESS FOR LONG

Caution: #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 “DISC FULL” and exits recording. #When recording with microphone, if you press buttons and the sound of pressing may

probably be recorded.

2.2.11 Tuning

#Enter tuning mode

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.

Caution: #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.

2.2.9 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.

PRESS PRESS PRESS

2.2.10 Recording

When recording, press button to pause and press button for long to exit recording and then make files.

PRESS

1. PRESET mode #Adjust channel

Press button to enter the next channel, and press button to enter the previous channel.

2.2.12 Tuning

#Full auto scanning

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 0.1MHz 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.

- 8 -

#Save radio station

Select channel in Preset mode firstly, and then switch to SCAN mode to adjust frequency (manually or automanually). After scanning desired frequency, press button to save into the current PRESET channel.

PRESS

CAUTION:

In the course of full auto/automanual scanning, press or button to stop

scanning. #FM RECORDING

In tuning mode, press button for long to enter FM recording. Press button to stop recording and make recording file .FM recording makes WAV format file.

2.3 SETTINGS

2.3.1 Settings

2.3.2 PLAY MODE

PRESS

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. 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.

PRESS

2.3.3 Eq select

Press button to enter "EQ SELECT", and then use to move cursor, shown as follows:

#Play Mode Normal Shuffle Playlist Intro REP One REP ALL REP DIR #EQ Select Normal 3D PURE POP Clas Jazz Rock Dbass Disco My EQ #Sleep Disable - 120Min

#3D Setup BassBoost ConcertSound #Playlist Browse Edit Delete #FM Channel Auto Mono #Screen Save Disable - 5Min #Advanced My EQ REC Set Format Load Default System Info Language

PRESS

The corresponding icons of each EQ mode in playback mode are shown as follows:

NORMAL

PURE

POP

CLAS

JAZZ

ROCK

DBASS

DISCO

My EQ

Select "3D", and correspond with 3D that you have preset in "MAIN MENU->SYSTEM SETUP->3D SETUP. If you have not set it, it is default value.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.

- 9 -

2.3.4 Sleep

Press 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.

Caution: #It is defaulted to be invalid each time when

power on.

#Timing power-on time is a rough time, and may

have difference.

PRESS

2.3.5 3D

In this menu, "3D “ may be adjusted. BassBoost can strengthen bass effect; and concert can build classical sound field effect. At the same time of confirming clearness, strengthen hearing feeling. Through adjustment, you may feel live and vivid sound field effect no matter where you are.

PRESS

2.3.6 Playlist

#Browse

Select "Browse" , and you may check how many songs have been program-med into playlist.When browsing playlist. Pressing button may begin playing.

PRESS

Note: Playback will be paused when in "Browse" or "Edit" list.

#Edit

PRESS

Select "Delete". After dialogue box pops up, select "YES", and press button to confirm and the playlist is cleared.

2.3.7 Playlist

NOTE #If the operation of adding or cancelling music

files is detected, MP3 PLAYER will clear the playlist automatically.

#You cannot enter "Edit list" and "Clear list"

when in program playback.

2.3.8 Fm channel

You can select the FM channel in settings. When select Auto, it changes the channel automatically when in tunning mode. When select Mono, it tunes at Mono channel all the time.

PRESS

2.3.9 Screen save

Press 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

2.3.10 Advanced

Advanced items include some other system internal setup, such as user sound effect setup, default setup and system information.

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

#My EQ

In "My EQ" interface, you may see the

decibel (dB) of each frequency.

PRESS

If you want to adjust the decibel of mediant (1kHz), operate according to the below illustration.

- 10 -

2.3.11 Advanced

press button to return to the previous menu.

PRESS

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

PRESS

2.3.12 Advanced

#Format

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.

Caution: Because firmware will use some space, the displayed content capacity may probably be different from the actual capacity. #Language

Russian and English are supported.

PRESS

#Upgrade

Download the latest firmware upgrading file from BBK website firstly, such as "BBK_X17RU. ebn" and "X17RU_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.

PRESS

#Load Default

PRESS

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.

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 about 10 seconds or more,

please try your best not to operate any 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.

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53mm 38.5mm 13.8mm about 25.5g(without battery),37.5g(with battery)

0 40

MPEG 1/2 Layer 3(16kbps 320kbps) WMA (8kbps 192kbps) WAV

- 12 -

Chapter Three Servicing and Principle

Section One Principle of the Player

3.1.1 Principle of the player

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. Output circuit: audio output.

6. MIC circuit: external audio input, record function finishes.

7. FM tuning circuit: professional FM tuning chip TEA5767HN of Philips company is adopted to

realize FM tuning.

3.1.2 Block diagram of the player

Block diagram of the player is shown in the figure 3.1.2.1:

12V DC-DC

BI-COLOR

OLED

FLASH

MEMORY

12MHz CRYSTAL

BUTTON ARRAY

MICROPHONE

PNX0101

DC BLOCK

ANTI-POP

INTERNAL

DC-DC

HEADPHONE

FM MODULE

3.3V FOR VDDIO

1.8V FOR VDDO

LPF

32.768KHz CRYSTAL

LPF

USB INTERFACE

Figure 3.1.2.1 X17 RU block diagram

1.5V/1 AAA BATTERY

- 13 -

3.1.3 Function introduction to IC used by the player

PCB board Location IC model Function

U1 TC58512FT Flash Memory

U4 LM2703 Supply 12.2V voltage

U6 Philips PNX0101 MP3 decode

U7 PQ1X28 Supply 2.8V voltage

U9 G690L263T System reset

U10 SI912DL Headphone mute

Tuning

board

U1 TEA5767HN Tuning module

Main board

Function introduction to IC used by X17 (RU) is shown in the following table:

- 14 -

Section Two Unit Circuit Principle

3.2.1 FLASH circuit

1. FLASH circuit schematic diagram is shown in the figure 3.2.1.1:

FLASH3V3

TC58512FT

100K

/RE /CE

CLE ALE /WE /WP

GND

RY/BY

104

D_GND D_GND

R2 100K

FLASH3V3

11 12 13 14 15 16 17 18 19 20 21 22 23 24

NC NC Vcc Vss NC NC CLE ALE WE WP NC NC NC NC NC

NC NC NC

NC I/O8 I/O7 I/O6 I/O5

Vcc Vss

NC I/O4 I/O3 I/O2 I/O1

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25

MPMC_AD7 MPMC_AD6 MPMC_AD5 MPMC_AD4

FLASH3V3

MPMC_AD3 MPMC_AD2 MPMC_AD1 MPMC_AD0

104

D_GND

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 TC58512FT and peripheral circuit

to finish internal files’s working of read, write and delete. 1.5V battery voltage, through PNX0101 internal

boosted circuit, provides 3.3V voltage for working of FLASH. R1 is pull up resistor of /CE, R2 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.

- 15 -

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;

SGND

C6 473

C7 473

10R

FM_3V3

475/X5R/0603

472

SGND

FM_OUTL

C8 473

C9 333

SGND

R2 18K1%

31 32 33 34 35 36 37 38 39 40

N.C

IFGAI

AGND AVCC

RFI1

RFGND

RFI2

TCAGC

LOOPSW

N.C

CPOP2VCOT13VCOT24VCOVCC5DGND6DVCC7DATA8CLOCK9N.C

DIFL128DIFL2

FM_OUTR

C12 333

FM_OUTL

FM_OUTR

N.C

LAVO

MPXO25VREF

RAVO

TCIFC

TMUTE

NECTAR-I

TEA5767HN

N.C

PHLF

PDLF

XTAL2

XTAL1

SWP2

SWP1

BUSEN

BUSM

W/R

33K

C14

102

C18

C17

223

C16

223

SGND SGND SGND

C15

22PF

102

D-GND D-GND

XT1

CRYSTAL

32.768KHz

FM_3V3

D-GND

IIC_SDA 2

IIC_SCL 2

C10

SGND

C2 27PF

101

FM_ANT

FM_ANT3

47PF

120nH/2%

FM_3V3

10K

33nH2%

393

100K

D-GND

C19

103

C11

33nH2%

C13

BB202

FM_3V3

SGND

dandu

22R

BB202

22R

104/X5R/0402

D-GND

Figure 3.2.2.1 FM tuning circuit diagram

- 16 -

2. Working principle: tuning circuit is composed of micro digital tuning IC TEA5767HN of Philips

company and peripheral circuit. Power supply voltage is supplied by PQ1X28 to provide pure voltage

with value 2.8V for IC. CN1 is socket between Fm module and main board. C1, C2, C3, C4, L1 are

antenna input matching circuit of FM module; diode D1, D2 and winding inductor are middle frequency

and selection frequency tuning circuit in FM module. Control means of FM adopts IIC bus control means,

9, 10 of TEA5767 are data line and control line.

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:

CN3

CON20

GND

C55

LCD_3V3

R47 2M

D_GND

R17 0R*

R240R

VOLED1

C62

106/25V/1206

LCD_RESET 1

/RESET 1

C65 22P

R53 27K1%

D_GND

MBR0520/SOD123

R49 240K1%

L23

L22 601

C73 104

D_GND

GND

TPS61040/LM2703

LCD_3V3VCC33

D_GND

L25

CDRH3D16-4R7

VIN

R54

0R*

C74 104

R68 1M*

1M R55

VCC33

L14 601

C54

475/X5R/6.3V

1 2

BS2 BS1

IREF VCOMH VOLED

R43 4.7K R44 4.7K

LCD_CS 1

LCD_D/C 1 LCD_WR 1 LCD_RD 1 LCD_DB0 1 LCD_DB1 1 LCD_DB2 1 LCD_DB3 1 LCD_DB4 1 LCD_DB5 1 LCD_DB6 1 LCD_DB7 1

103/25V

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Figure 3.2.3.1 OLED circuit schematic diagram

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, voltage

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