BBK X21 Service Manual

X21(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

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2

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3

4

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 OPERATIONl

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

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2.2.8 A-B REPEAT FUNCTION

7

2.2.9 RECORDING

2.2.10 TUNING

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

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2.4 SPECIFICATION

Chapter Three Principle and Servicing

section One Principle of the Player

3.1.1 Function introduction and principle of the player

3.1.2 Block diagram

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 module circuit

3.2.3 OLED module circuit

3.2.4 USB jack circuit

3.2.5 Button circuit

3.2.6 Charge management circuit

3.2.7 Low voltage detecting circuit

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16

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3.2.8 Battery protection circuit

3.2.9 Power management module

3.2.10 Headphone jack circuit

3.2.11 Reset circuit

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23

3.2.12 ON/OFF control circuit

23

3.2.13 MIC circuit

Section Three Servicing Cases

3.3.1 Servicing cases

3.3.2 Troubleshooting flow chart

Section Four Servicing Parameters

3.4.1 Key point waveform diagram

3.4.2 Key point voltage list

Section Five Function Introduction to IC

3.5.1 Function introduction to PNX0101

3.5.2 Function introduction to G690

3.5.3 Function introduction to PQ1X281

3.5.4 Function introduction to TC58512FT

3.5.5 Function introduction to SI1912DL

3.5.6 Function introduction to LM2703

3.5.7 TPS79301

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30

36

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43

44

44

48

49

49

50

50

51

3.5.8 Function introduction to TPS62200

3.5.9 Function introduction to ISL6294

3.5.10 Function introduction to S80829

3.5.11 Function introduction to TEA5767HN

Chapter Four Disassembly and Assembly Process

4.1 Whole set

4.1.1 Disassembly process of the whole set

4.1.2 Assembly process of the whole set

4.2 OLED display screen

4.2.1 OLED disassembly process

4.2.2 OLED assembly process

4.3 Li battery

4.3.1 Li battery disassembly process

4.3.2 Li battery assembly process

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59

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4.4 FM tuning board

4.4.1 FM tuning board disassembly process

4.4.2 FM tuning board assembly process

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Chapter Cinque PCB board & Circuit diagram

61

Section One PCB board

Section Two circuit diagram

Chapter six BOM List

61

62

66

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 Philips 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)
Build high-quality musical effect.
# Support 3D surround stereo sound effect, 9 EQ modes

LifeVibes

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

TM

5

4

M

1.1

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

6

7

1.3

1.1

1.2

3

2

8

enter main menu
switch in PRESET and SCAN mode
exit recording
not save the setup and return to the previous menu

- 4 -

1.3

1.2

2

3

4

5

6

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

# 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
# Press for long in tuning SCAN mode
# Menu mode
# 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

# Press for long in menu mode
# Press in playback mode
# Press for long when playing music file
(non recording file)
# Press in browsing file mode
# Press for long in tuning mode
# Press in Play and tune mode
# Press in

the next/previous track
fast forward/backward
select channel
manual scanning
full auto scanning
automanual scanning
move cursor or set item
power on
power off
pause playing
pause recording
pause (mute)
enter the selected item or
confirm the setup
enter recording mode
A-B repeat
switch
sound effect
delete file
Start FM recording
adjust volume
adjust dB value

unlock.

7

Headphone jack

8

USB jack

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.

2.1.4 PLAYING INTERFACE ILLUSTRATION

1

Play State

2

Sound effect mode

3

Playback mode

4

Repeat state

5

Battery capacity

6

Song name and Singer

# REC
Select "REC"to enter recording
mode
# FM Radio
Select " FM Radio"to enter radio mode.
# System Setup
Select " System Setup" to set system items.
# System Setup
Select " System Setup" to set system items.

7

Time that has been played

8

Number of tracks

9

Spectrum display

- 5 -

2.1.5 TUNING INTERFACE

ILLUSTRATION

2

1

1

PRESET mode (normal receiving)

2

Frequency of the current radio station

3

Battery capacity

4

Frequency bar

5

PRESET channel display

6

SCAN mode (scanning)

3

4

2.1.6 RECORDING INTERFACE

ILLUSTRATION

5

1

2

You only need to find the drive nformation 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 INSTALL USB DRIVE

PROGRAM

3

1

Name of recorded file

2

Battery capacity

3

Time that has been recorded

4

The left recordable time

5

Recording state

4

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 will

automatically indicate that
new firmware device has been found, and run
the installation guide, shown as the following
figure.

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 comer 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 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.

- 6 -

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 .

M

PRESS
FOR LONG

# 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" to exit.

M

/

PRESS

PRESS

/

PRESS
FOR LONG

CAUTION:

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

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

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.

PRESS

# 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
FOR LONG

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.

M

When playing, pressing button for long

may realize fast backward.

- 7 -

M

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

M

long to return to main menu.
# PRESET/SCAN MODE SWITCH

When listening to radio, press button to

M

M

PRESS

2.2.13 TUNING

# 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 buttonto save
into the current PRESET channel.

PRESS

CAUTION:

In the course of full auto/automanual

scanning, press or button to stop

M

scanning.
# FM RECORDING

In tuning mode, press button for long to

enter FM recording. Press button to stop
recording and make recording fil . FM recording
makes WAV format file.

/

M

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

PRESS
FOR LONG

/

In PRESET mode, press button for long to
begin full auto scanning. All
scanned radio stations will be saved in PRESET
channel automatically.

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.

2.3 SETTINGS

2.3.1 SETTINGS

# 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

Disable­120Min
# 3D Setup

BassBoost
ConcertSound

# Playlist

Browse
Edit
Delete

# FM Channel

Auto
Mono

# Screen Save

Disable - 5Min

- 8 -

# Advanced

My EQ
REC Set
Format
Load Default
System Info
Language

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.
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:

M

/

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 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.

/

M

PRESS

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

The corresponding icons of each EQ mode

in playback mode are shown as follows:

NORMAL

3D

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

PRESS

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 PRESS PRESS

- 9 -

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.

PRESS

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

“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.

PRESS

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

M

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

# 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.

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.

/

M

PRESS

PRESS

In

2.3.10 ADVANCED

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

PRESS

# My EQ

PRESS

PRESS

# Load Default

PRESS

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

M

cancel.
CAUTION:

Estore 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.

- 10 -

In system information menu, press button to

Model X21

Audio dicode chip Philips PNX0101

Continuous playback time The longest time is about 10 hours

Dimensions/weight 57mm×45mm×14mm about 30.7g

Audio SNR

90dB

Headphone out 9mW+9mW(32ohm im pedance)

Frequency range 18Hz~20kHz

FM tuning rang 87.5MHz~108MHz

Working temperature

0~40

Files supported MPEG 1/2 Layer 3(16kbps~320kbps),WMA(8kbps~192kbps),WAV

M

return to the previous menu.

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 X21RU.
ebn" and "X21RU_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

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.

2.4 SPECIFICATION

- 11 -

Chapter Three Principle and Servicing

section One Principle of the Player

3.1.1 Function introduction and principle of the player

X21 (RU) portable MP3 player is composed of the following functional modules:

# MP3 main decode chip: main chip adopts PNX0101 decode chip of Philips Company, PNX0101 is

the professional MP3 decode IC of Philips Company, with ARM and DSP integrated inside. The

advantages are good sound quality and low power consumption.

# Power management module: composed of TPS79301, TPS62200 and PQ1X28 and responsible

for the power supply of each part of MP3.

# USB module: USB jack, data exchange, and charge function.

# Lithium battery module: power supply of the player.

# Memory module: data storage of the player.

# OLED module: display of the working state of the player.

# Headphone output: audio output.

# MIC: external audio input, which fulfills recording function.

# Tuningmodle: FM tuning.

3.1.2 Block diagram

Block diagram is shown in the figure 3.2.1.1:

USB jack

module

management

USB power

Charger power

Low voltage detect

Charge
management

ISL6294

S80821

5V

Power

TPS79301

TPS62200

3.6V~4.2V

Lithium battery
module

LDO

DC-DC

LDO

PQ1X28

G690L263T

12M crystal
oscillator

Reset IC

3.3V

1.8V

2.8V

OLED module

PNX0101

MIC

12.1V

DC-DC

LMS2703

Button and
switch control
circuit

Headphone
output

FLASH

Figure 3.1.2.1 Block diagram of X21 (RU)

- 12 -

MEMORY

FM module

TEA5767

3.1.3 Introduction to IC used by the player

PCB board Location IC model Function

U1 TPS79301 Provide 3.3V voltage

U2 G690L263T System reset

U3 TPS62200 Provide 1.8V voltage

U4 ISL6294 Charge management

U5 S80829 Low voltage detect

U6 Philips PNX0101 MP3 decode

U7 PQ1X28 Provide 2.8V voltage

U8 TC58512FT Flash Memory

U9 SI912DL Headphone mute

Tuning board

U1 TEA5767HN Tuning module

Mian board

Introduction to IC used by X21 (RU ) is shown in the following figure:

- 13 -

Section Two Unit Circuit Principle

3.2.1 FLASH circuit principle

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

FLASH3V3

TC58512FT

U1

R1

100K

/RE
/CE

CLE
ALE
/WE
/WP

1

NC

2

NC

3

NC

4

NC

5

NC

6

GND

7

RY/BY

8

RE

9

CE

10

C2

104

D_GND D_GND

R2
100K

FLASH3V3

NC

11

NC

12

Vcc

13

Vss

14

NC

15

NC

16

CLE

17

ALE

18

WE

19

WP

20

NC

21

NC

22

NC

23

NC

24

NC

NC
NC
NC

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

NC

NC

NC

Vcc
Vss

NC

NC

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

NC

NC

NC

NC

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

C1

104

D_GND

Figure 3.2.1.1 Flash circuit schematic diagram

2. Working principle: Flash Memory is the storage unit of the player and all Mp3 and waveform files

must be saved in FLASH. Flash module is composed of FLASH chip TC58512FT and peripheral circuit,

which fulfills the read, write and cancel working of internal files. In whic

h, 601 magnetic L15, 104

capacitor C45 and C46 compose FLASH power filtering circuit and provide FLASH with pure 3.3V

voltage. R38 is p

ull-up resistor of /CE, R40 is pull-down resistor of /WP, Vcc is power supply pin of

FLASH, /CE is chip selection signal, VCC33 provides 3.3V voltage and FLASH begins to work. /RE, /WE

are effective read and effective write signal end respectively to control read and write function of FLASH.

I/O1 I/O8 is 8 data lines to fulfill the exchanges of FLASH and external data.

3.2.2 FM module circuit

1. FM module circuit schematic diagram is shown in the figure 3.2.2.1:

2. Working principle: FM module is composed of microwave digital tuning IC TEA5767HN produced

by Philips Company and the peripheral circuit, in which, L17, C54, C55 is the power supply filtering

circuit of FM module that provides IC with the pure voltage with typical value 2.8V. Cn1 is the socket

between FM module and main board.

- 14 -

C1, C2, C3, C4, L1 is the antenna input matching circuit of FM module; variable capacitance diode

D1, D2 and winding inductor is the frequence selection tuning circuit in FM module. The control of FM

adopts IIC bus control means, 9 and 10 of TEA5767 are two control input ends.

SGND

SGND

SGND

C6 473

C7 473

R1

10R

FM_3V3

C5

475/X5R/0603

C3

472

SGND

SGND

FM_OUTL

C8 473

C9 333

SGND

U1

R2 18K 1%

31
32
33
34
35
36
37
38
39
40

29

30

N.C

N.C

IFGAI

AGND

AVCC

RFI1

RFGND

RFI2

TCAGC

LOOPSW

N.C

N.C

CPOP2VCOT13VCOT24VCOVCC5DGND6DVCC7DATA8CLOCK9N.C

1

DIFL128DIFL2

FM_OUTR

C12 333

FM_OUTL

FM_OUTR

21

22

23

24

26

27

N.C

LAVO

MPXO25VREF

RAVO

TCIFC

TMUTE

NECTAR-IO603CS

TEA5767HN

N.C

20

PHLF

19

PDLF

18

XTAL2

17

XTAL1

16

SWP2

15

SWP1

14

BUSEN

13

BUSM

12

W/R

11

10

R6

33K

C14

102

C18

C17

223

C16

223

SGND SGND SGND

C15

22PF

102

D-GND D-GND

XT1

32.768KHz

FM_3V3

D-GND

IIC_SDA 2

IIC_SCL 2

C10

R3

SGND

C4

C2 27PF

C1 101

FM_ANT

FM_ANT3

47PF

L1

120nH/ 2%

FM_3V3

10K

R5

R4

393

100K

D-GND

C19

104/X5R/0402

BB202

D1

C11 103

33nH 2%

O603CS

L2

22R

BB202

D2

L3

33nH 2%

SGND

C13

104/X5R/0402

dandu

FM_3V3

R7

22R

D-GND

Figure 3.2.2.1 FM module circuit schematic diagram

- 15 -

3.2.3 OLED module circuit

1. OLED module circuit schematic diagram is shown in the figure 3.2.3.1:

CN4

NC1VCOMH

VCC

3

2

4

IREF

D7

5

D5

D3

D66D48D2

7

9

VDD

D/C#

WR#

RES#16RD#

D1

D0

11

12

10

BS2

CS#17GND21BS1

20

15

14

13

18

19

C71

475/X5R/6.3V

P_VDD

L24

601

VCC33

R71
100K

EN1

CDRH3D16-4R7

5

4

R73

0R

L25

1

VIN

SW

2

GND

3

EN

FB

U10

TPS61040/LM2703

D8

MBR0520/SOD123

240K 1%

R70

27K 1%

VOLED

C68

22P

L26

0R

GND

Figure 3.2.3.1 OLED circuit schematic diagram

C65

16V/104

C72

106/25V/1206

C63

103

VOLED

R65

2M

LCD_DB72LCD_DB3

LCD_DB62LCD_DB5

R63

R64

4.7K

4.7K

GND

C67

2

2

2

2

2

2

2

LCD_DB12LCD_DB4

LCD_DB2

R74
0R*R75

2

LCD_WR

LCD_D/C2LCD_DB0

LCD_CS

LCD_RD

/RESET

104

LCD_3V3

R72
0R

_RESET

2. Working principle: for 12V high voltage is required to lighten OLED, boosted circuit must be used

togther to fulfill it and the circuit includes two parts: boosted circuit and OLED jack circuit. In which,

boosted circuit is composed of boosted DC-DC LM2703 and peripheral circuit, VIN is power input, EN is

the enable end of LM2703, high level is effective, SW is high voltage output pin, FB is feedback pin, the

voltage value VOLED outputted by high voltage is achieved through selection the two divider resistance

and they satisfy the following relationship:

Seen from the above, VOLED is about, 12.2V. L25, C72 in circuit are energy storage inductor and

output capacitor of boosted circuit.

OLED jack circuit is connected with OLED jack of PNX0101 directly, the internal program of

PNX0101 controls the characters display of OLED, working state information of the player is displayed

through OLED to fulfill man-machine communication.

- 16 -

3.2.4 USB jack circuit

1. USB jack circuit schematic diagram is shown in the figure 3.2.4.1:

USB1

3DU05S-32T-10

Shield
Shield

GND

VB+

6
5
4
3

D+

2

D-

1

4

5

D5

362

1

GND

GND

Q8

L18

GND

R44
1K

680 DCR<100m

SS8550LT

RC LAMP0504FC

USB_VBUS 2

R47 100K

R42 18R

13

R43 18R

USB_DET 1

24

T1

SDCW2012-2-900T

USB_DP 2

USB_DM2

180K

R49

C56
104

Figure 3.2.4.1 USB jack circuit schematic diagram

2. Working principle: USB jack network is composed of VB+ (USB 5V power), D+ (anode data line),

D -( cathode data line) and GND (ground line). In the circuit, PNP triode Q8 is reverse insert protection

function to prevent the damage of Mp3 internal circuit because of reverse insert; D5 is TVS diode array

used for anti - static.

3.2.5 Button circuit

1. Button circuit schematic diagram is shown in the figure 3.2.5.1:

MENU

R55
300R

PREVIOUS

1

T

2

NEXT

D_GND

R56
220R

5C

PREVIOUS

S1

VCC33

D_GND

R54
1K

C57
104

A-B/REC

KEY_SCAN_2 2

C58
SFI0402-050E100NP

R68
750R

S3

VOL- C70

D_GNDD_GND D_GND

R69
510R

S4

S5

VOL+

VCC33

R67

D_GND

1K

SFI0402-050E100NP

C69
104

KEY_SCAN_1 2

Figure 3.2.5.1 Button circuit sche0matic diagram

2. Working principle: buttons of X21 (RU) include a 3-direction button, a HOLD switch and 4 single

buttons (in which one is ON/OFF and PLAY button and will be introduced in ON/OFF circuit). Button

detection uses partial voltage mode, which utilizes ADC circuit of PNX0101 to check voltage value of the

preset button to determine which button functions, then make the corresponding reaction by internal

program to fulfill function of each button.

To lock button, directly use a IO port of PNX0101 to detect high and low level. When high level is

detected, lock is determined, other buttons do not function. C58, C70 and C73 are voltage dependent

resistor to prevent ESD.

- 17 -

3.2.6 Charge management circuit

1. Charge management circuit mainly charges lithium-ion battery and the circuit schematic diagram

is shown in the figure 3.2.6.1:

USB_VBUS

/STATUS

VCC33

R16
47K

C12

105/X5R

P_GND

U4 ISL6294

1

IN

2

PPR

3

CHG
EN4GND

I_SET

BAT

IREF

IMIN

P_GND

R25 10K

8
7
6

R20

5

510K 1%

P_GND

R21

120K 1%

R26

100K

BAT

R22

120K 1%

Q6

SS8050LT

P_GND

3.2.6.1 Charge management circuit schematic diagram

2. Working principle: seen from the circuit, charge circuit is mainly fulfilled by charge control IC

ISL6294 and peripheral circuit. IN pin is power input pin of ISL6294, that is the input end of USB 5V, BAT

is output pin of ISL6294, that is the input end of lithium battery; /CHG is charge state indication end,

when /CHG is in low level, it means the charge is in process, on the contrary it means the charge is

finished; IMIN is minimum charge current setup end, that is, when charge current is less than the

current value set by this end, charge is stopped. The setup of minimum charge current is fulfilled through

selecting external resistor R20. The relationship between Minimum charge current IMIN and R20 is

shown as follows:

(MA)

Seen from the above, minimum charge current is about 20 milliampere.

IREF is setup end of charge current, ISL6294 uses this reference current to charge lithium battery.

The relationship between charge current I and resistor connected externally:

REF

Triode Q6 in circuit is used for charge current selection. When users use computer to charge battery,

PNX0101 outputs I_SET, which is low level, Q6 cuts off, and R21 is connected into circuit. Seen from the

above, I is about 100 milliampere; when users use charger to charge battery, PNX0101 outputs I_SET,

EFR

which is high level, Q6 is Saturated on, R21 and R22 are connected into circuit in parallel, seen from the

- 18 -

Above, I is about 200 milliampere. The reason why we design like this is that USB jack of some

REF

computers (such as laptop computer) cannot provide large current to charge battery.

3.2.7 Low voltage detecting circuit

1. Function of low voltage detecting circuit is that when input voltage of he player is detected to be

lower than a certain voltage value, the player turns off. Low voltage detecting circuit schematic diagram

is shown in the figure 3.2.7.1:

P_GND

S80829CN NB /S1000N29-N4T1/R3111Q291AT1S

EN

R18 33K

C15
102*

P_GND

U5

VSS

1

RST

VDD2NC

R24
100K

P_VDD

4

3

Q4

P_GND

MMST3906

R15
470K

VCC33

R10
100K

P_GND

Figure 3.2.7.1 Low voltage detecting circuit schematic diagram

2. Working principle: low voltage detecting ciorcuit is fulfilled by IC S80829CNNB and PNP triode

Q4. S80829CNNB is high precision voltage detector detect valve value is 2.9V and precision is +2 .

P_VDD is he input voltage of the player, when P_VDD is lower than 2.9V, RST pin of IC outputs low level,

pin triode Q4 is saturated on, control level output is low level which cuts off the power pf the player to

power off.

3.2.8 Battery protection circuit

1. Battery protection board is installed on lithium battery and used to protect lithium battery from

being damaged by short circuit, over discharge and over charge. Lithium battery and battery protection

board are all lithium battery core components by us. Circuit schematic diagram of battery protection

board is shown in the figure 3.2.8.1:

figure 3.2.8.1 Battery protection circuit diagram

- 19 -

Battery protection circuit equivalent circuit diagram is shown in he figure 3.2.8.2:

P+

R1

LITHIUM BATTERY

C1

5

Ct

Vss

VDD

U1

Dout

1

U2

V-

Cout

3

C3

2

R2

P-

4

B

6

C2

Figure 3.2.8.2 Battery protection circuit equivalent circuit schematic diagram

2. Working principle: battery protection circuit is mainly composed of battery protection IC S8261

and built-in dual N groove MOSFET ECH8601. S8261 is lithium-ion polymer of built-in high precision

voltage detect circuit and delay circuit, which may be served as protection IC of battery. DOUT and

COUT pin are over-discharge (when lithium battery voltage is lower than 2.4V, it is called over discharge)

protection output end and over-charge (when lithium battery voltage is higher than 4.2V, it is called over

charge) protection output end. When in normal condition, these two pins are high level, MOSFET

switches on, lithium battery voltage outputs to the player through protection board; when in protection,

these two pins output low level to control MOSFET and turn off power. Over-current detection (short-

circuit protection) is fulfilled through detecting short corcuit stat

e by V- pin to control DOUT and COUT

output. When battery has short circuit, voltage on V- externally connected resistor has a sudden change,

V- dete

cts that voltage on R2 increases instantly to control DOUT and COUT to output low level at the

same time and control MOS tube to cut off from battery to protect battery.

3.2.9 Power management module

1. Function of power management module is to provide the player with 3.3V, 3.8V and1.8V of

normal working. Circuit schematic diagram is shown in the figure 3.2.9.1, 3.2.9.2 and 3.2.9.3:

P_VDD

C2
106/X5R

P_GND

R3
68K

1
2

TPS7930 1

P_GND

EN

U1

VIN

VOUT
GND
EN3BYPASS

T

S

O

C6
102

FB

23-6

C4
103

6
5

R1

33K1 %

4

C1 22PF

R2
20K 1%

VCC33

VCC33

C3
106/X5R

P_GNDP_GND

Figure 3.2.9.1 3.3V power circuit schematic diagam

- 20 -

VCC33

PQ1X281M2ZP

1

VI

2

C39
106/X5R C40

GND
EN3BYPASS

VOUT

U7

5

4

C41
104

D_GND

R4
300K¡À1%

R5
120K¡À1%

P_GND

P_VDD

P_GND D_GND

Figure 3.2.9.2 2.8V power circuit schematic diagram

U3

C8
106/X5R

1

VI

2

GND

3

EN

TPS62200 /FAN5307*

P_GNDP_GND

EN

SW

FB

5

4

T

23

S

O

L1
CDRH3D16/HP-100

-

5

106/X5R

C7
47PF

C10
101

VCC18

2.8V

C9
106/X5R

VCC18

Figure 3.2.9.3 1.8V power circuit schematic diagram

2. Working principle: seen from the figure 3.2.9.1, 3.3V power is supplied by IC TPS79301 and

peripheral circuit. TPS79301 is a linear voltage stabilizing module (LDO also called), EN pin is

theenable pin that controls normal working, high level is effective; BYPASS has a resistor inside that can

composes low pass filter together with external 103 capacitor C4 to decrease output noise; the setup of

TPS79301 output voltage is decided by the resistance value of the two externally-connected resistors of

FB pin and the relationship is shown as follows:

Seen from the above, VOUT is about 3.2V.

1.8V power of the working of the player is provided by IC TPS62200 and peripheral circuit.

TPS62200 is high efficiency voltage drop DC-DC converter. EN is enable pin and high level is effective.

The relationship between TPS62200 output voltage and FB pin feedback resistor is shown as follows:

Seen from the above, the output voltage is about 1.75V.

To improve sound quality of Mp3 and effect of FM and microphone, we introduce 2.8V power to

supply power for audio system of PNX0101 and FM and microphone, feature of this channel 2.8V power

is: it is outputted by LDO PQ1X281, power is very pure with low ripple voltage. PQ1X281 may output

fixed voltage 2.8V, EN is the enable end.

- 21 -

3.2.10 Headphone jack circuit

1. Headphone jack circuit schematic diagram is shown in the figure 3.2.10.1:

GND

142

RCLAMP0504FC

R51
0R

1
3
4
5

2SJ-A382-001(HP-AC)
CN3

D6

3

U9

1

S1

2

G1

3

D2

Si1912DLS

6

D1

5

G2

4

S2

FM_ANT

OUTROUTL

FM_ANT

L27 106

L29 106

L28 106

6

5

R521KR53

1K

HP_VOUTR2

HP_VOUTL 2

R57 4.7K

R58
47K

MUTE 2

C59
103

Figure 3.2.10.1 Headphone jack circuit schematic diagram

2. Working principle: left and right channel audio signals outputted from PNX0101 output through

being coupled by 220uF capacitor to headphone jack circuit. Headphone jack circuit is composed by

dual MOS tube SI1912DL that controls sound output and headphone socket CN3, pin 2 and pin 5 of

SI1912DL are connected to mute circuit, after pressing MUTE button the control dual MOS tube is

cracked to cut off the output of headphone left and right channels. D6 is circuit is TVS diode array and

used to protect ESD. Ground wire of headphone is also served as the antenna input of FM module.

3.2.11 Reset circuit

1. Reset circuit supplies rest signal to PNX0101. Reset circuit schematic diagram is shown in the

figure 3.2.11.1:

VCC33

U2
G690L263T71/R3111N252CT1

2

GND

VCC

RESET

3

1

R76
0R

P_GND

/RESET 2,3

C5
SFI0402-050E100NP

P_GND

Figure 3.2.11.1 Reset circuit schematic diagram

2. Working principle: reset circuit is composed by reset IC G690L263 . G690L263 may output a low

level reset pulse signal with 140 millisecond pulse width to reset the player. C5 in the circuit is voltage

dependent resistor and used to protec ESD.

- 22 -

3.2.12 ON/OFF control circuit

1. ON/OFF control circuit schematic diagram of X21 (RU) is shown in the figure 3.2.12.1:

P_VDD

R13

5.6M

P_GND

R8
10K

47K

R19
2M

START

R9
10K

D4

1N4148WSR14

START 3

START

OFF 2

PLAY/PAUSE2

START1

C62

SFI0402-050E100NP

SFI0402-050E100NP

PLAY

P_GND

C64

VCC33

Q2

MMST3906

R10

100K

EN

R15
470K

P_GND

1N4148WS

Q3
SS8050LT

D3

R17
100K

Q5
MMST3904

R12
100K

C14
475/X5R

R23 1M

VCC33

R62

100k

D7
1N4148WS

L23
601/1005

S2

START/PLAY/PAUSE

D_GND

PLAY/PAUSE

Figure 3.2.12.1 ON/OFF control circuit schematic diagram

2. Working principle: ON/OFF control is fulfilled through operating ON/OFF button S2 bu users.

When press S2 to power on, S2 is connected, START sends out low level signal, Q2 is saturated on,

battery voltage P_VDD makes EN high level through Q2, R12 and D3 to make power management

module work, power system of the player starts and machine power on; when power off normally (for

instance, press ON/ONN button for a long time or battery electric charge is too low), PNX0101 sends out

OFF high level to make Q3 saturated on to pull EN down to ground, power management module stops

working and machine power off; when accidents happens, system fails, PNX0101 has not any reaction

to any operation, now press S2 and Q2 is saturated on all the time, battery voltage P_VDD charges C14

through Q2, R13 and R19, when C14 is charged higher than 0.5V, Q3 is on, EN is low level and the

player power off. PN knot of R17 and Q5 is the figure is the discharge loop of C14.

3.2.13 MIC circuit

1. MIC circuit schematic diagram is shown in the figure 3.2.13.1:

ADC_VDDA33

R59
100K

R60
470K

Q9

MMST3904

C60

106

R61

2.2K

MIC1

C61

ADC_MIC

MICROPHONE

104

Figure 3.2.13.1 MIC circuit schematic diagram

- 23 -

ADC_MIC 2

2. Working principle: MIC circuit is mainly composed of microphone and microphone power biasing

circuit. MIC1 switches the recorded external voice signals to electrical signal, through C61 coupling,

output to ADC circuit of PNX0101 to converse analog electric signal to digital electric signal and form

WAV files after encoding of software to save in FLASH.

In the circuit, R59, R60, Q9 and C60 are triode voltage stabilizing system, which provides stable

power bias for microphone, R61 is the bias resistor of microphone.

- 24 -

Section Three Servicing Cases

3.3.1 Servicing cases

Example 1 Symptom: power not on

Description: no screen display and no output

Analysis and troubleshooting: firstly check whether this trouble is caused by battery or by power

circuit, connect to power adapter and check whether charge is available and whether screen has display.

Power on and there is no display, check power supply 3.3V and 1.8V and find that 3.3V lowers to 0.6V,

and voltage in normal working condition should be 1.8V, 3.3VDC-DC switch circuit is shown in the figure

3.3.1.1, use power adapter to supply power, 5V input is normal, charge enable end is high level, which is

also normal, observe carefully and find that pin 6 of Ic9301 has false welding, after welding again trouble

is removed.

P_VDD

C2
106/X5R

P_GND

R3
68K

P_GND

EN

U1

1

VIN

2

GND
EN3BYPASS

TPS79 30 1

C6
102

VOUT

S

O

T

FB

23-6

C4
103

6
5
4

R2
20K 1%

R1

33K1 %

C1 22PF

VCC33

P_GNDP_GND

C3
106/X5R

VCC33

Figure 3.3.1.1 3.3VDC-DC switch circuit schematic diagram

Example 2 Symptom: machine not switched on

Description: no screen display, no response after pressing ON/OFF button

Analysis and troubleshooting: firstly confirm whether it is machine not switched on or it is power not

on, connect to adapter or computer and check whether display on screen is normal, connect to adapter

and charge can display, which means that power and rear stage circuit working are basically normal,

ON/OFF circuit is shown in the figure 3.3.1.2 , the working principle is that after a light touch switch S2

closes, a loop appears and s signal Start produces, triode Q2 is on and gives a enable signal to power

control, test S2 switch, press down and check whether it is on, during test we find that S2 has false

welding. After welding again, trouble is removed.

- 25 -

P_VDD

EN

100K

R15
470K

VCC33

R10

P_GND

D3

1N4148WS

Q3
SS8050LT

R17
100K

Q5
MMST3904

Q2

MMST3906

R12
100K

C14
475/X5R

R23 1M

R13

5.6M

P_GND

R8
10K

47K

R19
2M

R9
10K

START

D4

1N4148WSR14

START 3

START

OFF 2

Figure 3.3.1.2 ON/OFF circuit schematic diagram

Example 3 Symptom: computer not connected

Description: when connecting to computer, no reaction and o screen display

Analysis and troubleshooting: firstly confirm whether charge and power on are available, and the

result is normal. Use diode position of multimeter and anode of pen to ground, test whether the

resistance value to ground of D+, D- data signals in the position of USB terminal is close to several

hundred omh, short-circuit could not appear between D+ and D, when testing we find that D+ is normal,

D- resistance value is infinite, USB terminal has false welding. After welding again, trouble is removed.

Example 4 Symptom: only one side of headphone has output

Description: only one side of headphone has output and the other has not.

Analysis and troubleshooting: firstly decide the trouble lies in tuning components or in common part,

whether only one side has sound when listening and result is normal. Tuning circuit is shown in the

figure 3.3.1.3, tuning part components reaches the main board through a flat cable holder, radio station

program can be received and this shows that power supply, data and clock are all normal, use

oscillograph to test left and right channel output of FM directly and find that FM-OUTL has no waveform

output, then check tuning board output part and waveform is normal, circuit at back is connected through

a flat cable holder, press the flat cable holder and it is ok, after losing, trouble appears again, so we

decide that flat cable holder has trouble, after changing it trouble is removed.

CN1

IIC_SDA
IIC_SCL

IIC-SDA
IIC-SCL

D_GND

CON2X4

FM_3V3

6 5
8 7

12
34

FM_ANT

FM-OUTL
FM-OUTR

FM_OUTL
FM_OUTR

Figure 3.3.1.3 Tuning circuit schematic diagram

- 26 -

Example 5 Symptom: noise when playing

Description: headphone output has noise when playing music

Analysis and troubleshooting: if noise appears when playing, it is generally the condition that BGA

has trouble, functions, such as playing are all normal and only noise appears, so we need to analyse the

trouble is caused by decode part or rear stage. Headphone output part circuit is shown in the figure

3.3.1.4. When playing 1KHZ standard signal, it should be sine wave signal, and not any clutter exists.

Firstly test C32 and waveform in C33, and there exists clutter, so we decide that BGA has trouble, after

changing it trouble is removed.

C27 332

C28 332

HP_VOUTR2

HP_VOUTL2

C31 220UF/4V

C32 220UF/4V

R29 10RC40 104

M3
M2

P3
N3
N2
N1

DAC-VOUTR
DAC-VOUTL

HP-OUTR
HP-OUTL
HP-OUTCA
HP-OUTCB

DAC

Figure 3.3.1.4 Decode part circuit schematic diagram

Example 6 Symptom: charge is not available

Description: connect to charger, charge displays, but low electric charge displays when power on

after charge finishes.

Analysis and troubleshooting: as for this trouble, charge mode displays, charge also displays, but

full charge is not available, machine cannot power on after charging for 3 hours, power on after

unplugging charge line and low electric charge displays and machine power off automatically. Charge

management circuit diagram is shown in the figure 3.3.1.5, machine can enter charge mode and there is

charge indication, which means that there is power input, BAT and CHG are normal, so you should

consider charge control pin, check IMIN current control end mainly, when current of this pin is small,

charge stops, when checking this end, we find that R20 is false welding; after welding again, trouble is

removed.

USB_VBUS3

VCC33

R16
47K

/STATUS2

C12

105/X5R

P_GND

U4 ISL6294

1

IN

2

PPR

3

CHG
EN4GND

I_SET

BAT

IREF

IMIN

P_GND

R25 10K

8
7
6

R20

5

510K 1%

P_GND

R21

120K 1%

R26

100K

BAT

R22

120K 1%

Q6

SS8050LT

P_GND

Figure 3.3.1.5 Charge board circuit schematic diagram

- 27 -

Example 7 Symptom: no screen display

Description: screen is not on and there is no display

Analysis and troubleshooting: firstly confirm the trouble appears in power supply and screen itself,

after power and listen, the sound is normal, so we preliminarily decide that power supply 3.3V, 1.8V are

basically normal. Screen display control circuit is shown in the figure 3.3.1.6. Test voltage on two ends of

L25 and it is about, which is normal, then test voltage on two ends of D8 and find that anode has no 13V,

remove screen and there is still no13V. Check input end voltage and enable end is basically normal,

then check feedback pin FB voltage and it is on low side obviously, and capacitor C68 also has trouble.

After changing it, trouble is removed.

CN4

VDD

NC1VCOMH

VCC

2

D5

IREF

D66D48D2

D7

7

3

4

5

D39WR#

D1

D0

13

11

12

10

D/C#

RES#16RD#

BS2

CS#17GND21BS1

20

15

14

18

19

P_VDD

L24

C71

475/X5R/6.3V

601

VCC33

R71
100K

EN1

2

CDRH3D16-4R7

5

4

R73

0R

L25

1

VIN

SW

2

GND

3

EN

FB

U10

TPS61040/LM2703

MBR0520/SOD123

Figure 3.3.1.6 Screen display control circuit schematic diagram

Example 8 Symptom: screen trouble

Description: screen display has error and disorder

D8

R70

240K 1%

27K 1%

VOLED

C68

22P

L26

0R

GND

C65

16V/104

C72

106/25V/1206

C63

103

VOLED

R65

2M

2

LCD_DB72LCD_DB3

LCD_DB62LCD_DB5

R63

R64

4.7K

4.7K

GND

C67

2

2

2

2

2

2

LCD_WR

LCD_DB12LCD_DB4

LCD_D/C2LCD_DB0

R74
0R*R75

LCD_CS

LCD_RD

/RESET

LCD_DB2

104

2

LCD_3V3

R72
0R

LCD

2

1,2

_RESET

Analysis and troubleshooting: servicing of screen trouble is similar to that of no screen display and

the difference is that power supply may not be considered, that is, power supply should be normal.

Firstly confirm the trouble lies in screen itself or the circuit, change display screen and trouble still exists,

then use oscillograph to test 8-bit data on OLED display screen, we find during the test that flat cable

holder of display screen is false welding, after welding again trouble is removed.

Example 9 Symptom: noise when recording

Description: when playing record files, there is noise.

Analysis and troubleshooting: recording circuit is shown in the figure 3.3.1.7 and composed of

microphone and microphone biasing circuit.

- 28 -

MIC switches the recorded external voice signal to electric signal, through C61 coupling, output to

ADC circuit of Pn0101 and form WMV files after being coded by software to save in Flash. Firstly lay

sound file and check whether there is noise, and there is no, check recording circuit, power supply is

normal, when recording, use oscillograph to test C61 and there is clutter interference. After changing

MIC, trouble is removed.

ADC_VDDA33

R59
100K

R60
470K

Q9

MMST3904

C60

106

MIC1

MICROPHONE

R61

2.2K

C61

104

ADC_MIC

ADC_MIC 2

Figure 3.3.1.7 Recording circuit schematic doagram

Example 10 Symptom: computer cannot be connected

Description: after connecting to computer, hardware cannot be found

Analysis and troubleshooting: movable disc of computer cannot be found, when this trouble

appears, checjk whether you may upgrade software and download program to upgrade. Open DFU

program, download firmware again and it is ok. Note: firmware of Mp3 need to be upgraded always.

When meets this trouble, trouble is removed.

- 29 -

3.3.2 Troubleshooting flow chart

1. Troubleshooting process for “No screen display” is shown in the figure 3.3.2.1:

No screen display

Whether

12V voltage of D8 cathode

is normal

Y

Whether

there is 12V voltage on

display screen

socket

Y

Change

display screen

components and check

whether it is

normal

Y

Display screen has trouble

N

Check DC-DC boosted
circuit and elements around

N

Whether display screen flat
cable holder has false welding

N

Display screen flat
cable holder has trouble

Figure 3.3.2.1 Screen display circuit troubleshooting figure

- 30 -

2. Troubleshooting process for “USB not connected” is shown in the figure .3.3.2.2:

USB not connected

whether

5V of L18 is normal;

whether grounding is

normal

Y

Whether 3.3V, 1.8V

are normal

Y

whether

oscillation of 12M

crystal oscillator is

normal

Y

check

resistor to ground of

D+, D-

Y

Change audio decode

IC PNX0101

N

Q8 has trouble or USB
socket has false welding

N

Check each DC-DC switch
circuit and peripheral elements

N

Change crystal oscillator or
capacitor on two sides

N

Check whether T1 or USB
socket pin has rosin joint

Figure 3.3.2.2 USB jack troubleshooting flow chart

- 31 -

3. Troubleshooting process for “Button has no function” is shown in the figure 3.3.2.3:

Button has no function

Whether

all functions have no

function

Y

whether

lock button has

action

Y

HOLD

and 3.3V are

short-circuited ?

Y

Change HOLD button

N

Change some button

N

N

Change BGA

Change BGA

Figure 3.3.2.3 Button circuit troubleshooting flow chart

- 32 -

4. Troubleshooting process for “Charge is not available”is shown in the figure 3.3.2.4:

Charge is not available

Whether

battery voltage is fully

charged 4.2V-4.3V

Y

Battery

full charged, protected?

Y

Discharge is ok

Figure 3.3.2.4 Charge management circuit troubleshooting flow chart

N N

Battery components have
trouble

Charger

and computer cannot

charge?

Y

whether

power supply is normal?

Y

Whether

BAT voltage has

variation

Y

Check I_SET and whether
voltage high level is normal

N

Check power supply circuit

N

Change IC6298

- 33 -

5. Troubleshooting process for “Power not on” is shown in the figure 3.3.2.5:

Power not on

Check U3 and circuit
around

Whether

3.3V output is normal

N

Whether

1.8V output is normal

Check BGA working
conditions

N N

Y

N

Y

Whether

5V input is normal

Whether

load is too heavy

Y

BGA has trouble

N

Check U1 and circuit around

Figure 3.3.2.5 Power management circuit troubleshooting flow chart

Check whether Q8 is
normal

- 34 -

6. Troubleshooting process for “Machine not switched on” is sown in the figure 3.3.2.6:

Machine not switched on

N

Whether adapter is

charged

Y

Refer to troubleshooting
flow chart for "Power not on”

Whether

S2 has open circuit and

false welding

Y

Change S2

Figure 3.3.2.6 ON/OFF control circuit troubleshooting flow chart

N

Whether Q2 is normal

Whether D8 is on

Check whether EN end is
normal

N

Check whether 3.3V power

Y

Y

supply of R10 is normal

N

Check whether R12 or D3
has open circuit

- 35 -

Section Four Servicing Parameters

3.4.1 Key point waveform diagram

This section collects signal waveform diagram of audio, video and each unit circuit with the purpose

to help servicing personnel to judge where trouble lies in accurately and quickly to improve servicing

skills. For the difference of oscillograph’s type, model and tuner, a certain difference may exist, so the

servicing personnel are expected to pay more attention to check in daily operation.

1. 12M crystal oscillator oscillation waveform diagram

2. L25 boosted energy storage waveform diagram

- 36 -

3. L1 1.8V energy storage waveform diagram

4. LCD_CS wabeform

5. LCD_D/C waveform diagram

- 37 -

6. LCD_RESET

7. LCD_WR waveform diagram

8. LCD_RD waveform diagram

- 38 -

9. LCD_DB0 waveform diagram

10. LCD_DB1 waveform diagram

11. LCD_DB2 waveform diagram

- 39 -

12. LCD_DB3 waveform diagram

13. LCD_DB4 waveform diagram

14. LCD_DB5 waveform diagram

- 40 -

15. LCD_DB6 waveform diagram

16. LCD_DB7 waveform diagram

17. IREF waveform diagram

- 41 -

18. VCOMH waveform diagram

- 42 -

3.4.2 Key point voltage list

Test point

Working voltage (V

FM3V3 CN1_4

2.82

CN4_2 12.36

CN4_3 (screen bright) 9.58

CN4_4 9.46

CN4_20 3.31

VCC33 (one end of R62) 3.31

U8_9 3.28

U8_12 3.31

U8_19 3.31

Q9_C 3.31

Q9_B 2.65

Q9_E 2.06

MIC_+ 1.71

KEYSCAN_1_S3 1.09

KEYSCAN_1_S4 1.12

KEYSCAN_1_S5 0

- 43 -

Section Five Function Introduction to IC

3.5.1 Function introduction to PNX0101

The PNX0101 (ARM-based Solid State Audio IC) is an IC based on an embedded RISC processor. The
device is designed for hand -held Solid State Audio applications like portable MP3 players. The high level of
integration, low power consumption and high processor performances make the PNX0101 very suitable for
portable hand-held devices.

The PNX0101 is based on the powerful ARM7TDMI CPU core, which is a full 32 -bit RISC processor with
8 k byte dedicated cache.

Pin function of PNX0101 is shown as the following table:

PIN Main Description
T10 XTALH_IN 12M clock in

V9 XTALH_OUT 12M clock out

U9 XTALH_VDDA18 Crystal oscillator analog power supply

T9 XTALH_VSSA Crystal oscillator analog ground

V7 XTALH_IN Digital ground

T8 XTALH_OUT Unused
U8 XTALH_VDDA18 Crystal oscillator analog power supply

V9 XTALH_GNDA Crystal oscillator analog ground

T12 SPDIF_IN Unused

U11 SPDIF_VDDA18 Grounding

T11 SPDIF_GNDA Grounding

U5 ADC10B_GPA 4 Unused

T6 ADC10B_GPA3 Unused

U6 ADC10B_GPA2 Unused
T7 ADC10B_GPA1 Unused

U7 ADC10B_GPA0

V10 ADC10B_VDDA33 10bitADC power supply

U10 ADC10B_GNDA 10bitADC grounding

-44 -

Analog common pin (battery＋)

M3 DAC_VOUTR AC grounding
M2 DAC_VOUTL AC grounding

L1 DAC_VDDA33 DAC analog power supply

L2 DAC_VREFP 　

M1 DAC_VREFN Grounding

P3 HP_OUTR Headphone output (right)
N3 HP_OUTL Headphone output (left)

N2 HP_OUTCA N1 connected

N1 HP_OUTCB N2 connected

R1 HP_VDDA33A Headphone analog power supply

R2 HP_VDDA33B Headphone analog power supply

P2 HP_GNDAA Headphone analog ground

P1 HP_GNDAB Headphone analog ground
T3 ADC_VCOM AC grounding

U2 ADC_VREFP Voltage reference

V1 ADC_VREFN Grounding

V3 ADC_VDDA18 Analog 1.8V power supply

U3 ADC_VDDA33 Analog 3.3V power supply

V2 ADC_GNDA Grounding

U1 ADC_VREF AC grounding

T1 ADC_VINR
T4 ADC_VINL

R3 ADC_MIC Analog input— MIC input

T2 ADC_MIC_LNA 　

G2 LCD_RW_WR LCD read/write gating

F2 LCD_E_RD 　

E3,E2,D3,D1,D2,C3

C1,C2　

B3 LCD_CSB Chip selection

LCD_DB_7～0

Analog input (right)－tuning right

Analog input (left)－tuning left

LCD data line

F3 LCD_RS Data/instruction gating

J3 MCI_DAT_3 Card read gating

J1 MCI_DAT_2 　

J2 MCI_DAT_1 Unused

-45 -

H3 MCI_DAT_0 Power off level
G3 MCI_CLK Card read chip selection clock

H2 MCI_CMD Unused

T15 USB_CONNECT_N USB2.0 output

U17 USB_DP USB data line

T17 USB_DM USB data line

U14 USB_VBUS USB power supply

P16 USB_RREF Unused

R17 USB_GNDA Analog

R16 USB_VSSA_REF Analog

T16 USB_VSSA_TERM Analog

U15 USB_VDDA18_PLL Unused

U16 USB_VDDA18_BG Unused
U18 USB_VDDA33 Unused

V18 USB_VDDA33_DRV Unused

H17 DAI_BCK Unused

G17 DAI_WS Unused

G16 DAI_DATA Unused

F16 DAO_CLK Unused

G18 DAO_BCK Unused

F18 FAO_WS Unused
F17 DAO_DATA Unused

T13 JTAG_TRST_N J1

V4 JTAG_TCK J2

U12 JTAG_TMS 3.3V

T5 JTAG_TDI J3

U13 JTAG_TDO J4

U4 JTAG_SEL_ARM J5

H16 IIC_SCL Serial clock IIC control

J17 IIC_SDA Serial data IIC control

B8,C8,B7,C7,B6,C6 MPMC_D_15~ 0

C5,C4,B5,A5,B4,A4

MPMC_A_20~ 0 MPMC address line

A3,B2,A2,A1　

MPMC data in/out (use 7～0 as data line)

-46 -

B11 MPMC_STCS_2 Unused

A8 MPMC_STCS_1 Unused

C9 MPMC_STCS_0 Unused

B9 MPMC_DYCS Unused

A10 MPMC_CLKOUT Unused

B10 MPMC_CKE Unused

C11 MPMC_WE Unused

A9 MPMC_RAS Unused

C10 MPMC_CAS Unused

A11 MPMC_DQM_1 Unused

C12 MPMC_DQM_0 Unused

A17 MPMC_NOE Read gating

B12 MPMC_BLOUT_1 Unused
A12 MPMC_BLOUT_0 Write gating

B1 MPMC_RPOUT Unused

L3 UART_TXD Unused

K3 UART_RXD Unused

K2 UART_NCTS Unused

K1 UART_NRTS Unused

J16 GPIO_3 DFO

K18 GPIO_2 G2
K17 GPIO_1 G2

K16 GPIO_0 P_GND

T14 RSTIN_N System reset

V15 FLASH_VDD_HV 　

H1 VDDI1 Merm core power supply

V11 VDDI2 Core power supply

V16 VDDI3 Flash core power supply

G1 VSSI1 Merm core grounding

V12 VSSI2 Core grounding

V17 VSSI3 Flash core grounding

E1 VDDE1 3.3V power supply

V5 VDDE2 3.3V power supply

-47 -

V14 VDDE3 3.3V power supply

J18 VDDE4 3.3V power supply

A16 VDDE5

A7 VDDE6

F1 VSSE1 Grounding

V6 VSSE2 Grounding
V13 VSSE3 Grounding

H18 VSSE4 Grounding

A15 VSSE5 Grounding

A6 VSSE6 Grounding

L17 DCDC_PLAY Power on signal

L18 DCDC_STOP P_GND

N17 DCDC_LX2 DC- DC in

P17 DCDC_LX1 DC- DC in

T18 DCDC_VUSB USB voltage input

M17 DCDC_VBAT Battery power supply

1.8V～3.3V power supply

1.8V～3.3V power supply

R18 DCDC_VOUT33A DC/DC 3.3V out

M16 DCDC_VOUT33B DC/DC 3.3V in

N18 DCDC_VOUT18 DC/DC 1.8V in

P18 DCDC_VSS1 DC/DC grounding

N16 DCDC_VSS2 DC/DC grounding

L16 DCDC_GND Core grounding

M18 DCDC_CLEAN Datum circuit grounding

3.5.2 Function introduction to G690

The G690 are microprocessor (UP) supervisory circuits used to monitor the power supplies in??and
digital systems. They provide excellent circuit reliability and low cost by eliminating external components and
adjustments when used with +5V, +3.3V, +3.0V - powered circuits.
These circ uits perform a single function: they assert a reset signal whenever the VCC supply voltage declines
below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold.
Reset thresholds suitable for operation with a variety of supply voltages are available.

-48 -

Pin function is shown as the following figure:

Pin Contiguous signal name Function description

1 /RESET Output reset low level

2 VCC IC power supply

3 GND rounding

3.5.3 Function introduction to PQ1X281

PQ1X281 may output fixed voltage 2.8V, EN pin is enable end, high level works. The feature of the 2.8V
voltage outputted by this IC is small ripple and pure voltage, which is used to supply power for audio system,
FM and microphone.

Pin function is shown as the following figure: ：

Pin Contiguous signal name Function description

1 VIN DC input

2 GND Grounding

3 EN Enable end

4 BYPASS Form filtering circuit with external resistor

5 VOUT Voltage output

3.5.4 Function introduction to TC58512FT

Offered in 512M×8bit, the K9K4G08U0M is 4G bit with spare 128M bit capacity. Its NAND cell provides
the most cost-effective solution for the solid state mass storage market. A program operation can be
performed in typical 200µs on the 2112-byte page and an erase operation can be performe d in typical 2ms on
a 128K -byte block. Data in the data page can be read out at 30ns cycle time per byte. The I/O pins serve as
the ports for address and data input/output as well as command input. The on-chip write controller automates
all program and erase functions including pulse repetition, where required, and internal verification and
margining of date Even the write-intensive systems can take advantage of the K9K4G08U0M's extended
reliability of 100K program/erase cycles by providing ECC(Error Correc ting Code) with real time mapping-out
algorithm. The K9K4G08U0M is an optimum solution for large nonvolatile storage applications such as solid
state file storage and other portable applications requiring non -volatility. An ultra high density solution having
two 4Gb stacked with two chip selects is also available in standard TSOPI package.

-49 -

Pin function is shown as the following figure：

Pin Contiguous signal name Function description

9 /CE Chip selection

8 /RE Read gating

18 /WE Write gating

19 /WP Write protection

7 RY/BY Busy/idle judgment

12、37

VCC Power supply

3.5.5 Function introduction to SI1912DL

SI1912DL integrates 2 MOS tubes insides and is used to control on/off of two circuits. In X17 (RU),it is

served as control IC of secondary output.

Pin function is shown as the following figure：

Pin Contiguous signal name Function description

1 S1 S electrode of MOS tube 1

2 D1 D electrode of MOS tube 1

3 G2 G electrode of MOS tube 2

4 S2 S electrode of MO tube 2

5 G2 G electrode of MOS tube 2

6 D1 D electrode MO tube 1

3.5.6 Function introduction to LM2703

The LM2703 is a micropower step -up DC/DC in a small 5-lead SOT-23 package. A current limited, fixed
off-time control scheme conserves operating current resulting in high efficiency over a wide range of load
conditions. The 21V switch allows for output voltages as high as 20V. The low 400ns off-time permits the use
of tiny, low profile inductors and capacitors to minimize footprint and cost in space-conscious portable
applications. The LM2703 is ideal for LCD panels requiring low current and high efficiency as well as white
LED applications for cellular phone back-lighting. The LM2703 can drive up to 4 white LEDs from a single
Li-Ion battery.

-50 -

Pin function is shown as the following figure：

Pin Contiguous signal name Function description

1 SW Voltage output end

2 GND Grounding

3 FB Output feedback

4 EN Enable end

3.5.7 TPS79301

The TPS793xx family of low-dropout (LDO) low-power linear voltage regulators features high power
supply rej ection ratio (PSRR), ultralow noise, fast start-up, and excellent line and load transient responses in
NanoStar wafer chip scale and SOT23 packages. NanoStar packaging gives an ultrasmall footprint as well as
an ultralow profile and package weight, making it ideal for portable applications such as handsets and PDAs.
Each device in the family is stable,with a small 2..2-µF ceramic capacitor on the output. The TPS793xx family
uses an advanced, proprietary BiCMOS fabrication process to yield extremely low dropout voltages (e.g., 112
mV at 200mA, TPS79330). Each device achieves fast start-up times (approximately 50µs with a 0.001-µF
bypass capacitor) while consuming very low quiescent current (170 µA typical). Moreover, when the device is
placed in standby mode, the supply current is reduced to less than 1 µA.

Pin function is shown as the following figure：

Pin Contiguous signal name Function description

1 VIN Voltage input

2 GND Grounding

3 EN IC enable pin

4 BYPASS Internal resistor and external compose filtering circuit

5 FB Feedback

6 VOUT Voltage output

3.5.8 Function introduction to TPS62200

The TPS6220x devices are a family of high-efficiency synchronous step-down converters ideally suited
for portable systems powered by 1-cell Li-Ion or 3-cell NiMH/NiCd batteries. The devices are also suitabl e to
operate from a standard 3.3-V or 5-V voltage rail. With an output voltage range of 6.0 V down to 0.7 V and up
to 300 mA output current, the devices are ideal to power low voltage DSPs and processors used in PDAs,
pocket PCs, and smart phones. Under nominal load current, the devices operate with a fixed switching

-51 -

frequency of typically 1 MHz. At light load currents, the part enters the power save mode operation; the
switching frequency is reduced and the quiescent current is typically only 15 µA; therefore it achieves the
highest efficiency over the entire load current range. The TPS6220x needs only three small external
components. Together with the tiny SOT23 package, a minimum system solution size can be achieved. An
advanced fast response voltage mod e control scheme achieves superior line and load regulation with small
ceramic input and output capacitors.

Pin function is shown as the following figure：

Pin Contiguous signal name Function description

1 VIN Voltage input

2 GND Grounding

3 EN IC enable pin

4 FB Output feedback

5 SW External device pin, voltage output

3.5.9 Function introduction to ISL6294

The ISL6294 is a cost-effective, fully integrated high input voltage single-cell Li -ion battery charger. The
charger uses a CC/CV charge profile required by Li -ion batteries. The charger accepts an input voltage up to
28V but is disabled when the input voltage exceeds the OVP threshold, typically 6.8V, to prevent excessive
power dissipation. The 28V rating eliminates the over-voltage protection circuit required in a low input voltage
charger.

The charge current and the end-of-charge (EOC) current are programmable with external resistors. When
the battery voltage is lower than typically 2.55V, the charger preconditions the battery with typically 20% of the
programmed charge current. When the charge current reduces to the programmable EOC current level during
the CV charge phase, an EOC indication is provided by the CHG pin, which is an open-drain output. An
internal thermal foldback function protects the charger from any thermal failure.

Two indication pins (PPR and CHG) allow simple interface to a microprocessor or LEDs. When no
adapter is attached or when disabled, the charger draws less than 1µA leakage current from the battery.

Pin function is shown as the following figure：

Pin Contiguous signal name Function description

1 IN Power input

2 /PPR Charge voltage limit end

3 /CHG Charge state indication

-52 -

4 /EN IC enable pin

5 GND System grounding

6 IMIN Minimum current setup

7 IREF Charge current setup

3.5.10 Function introduction to S80829

The S-808xxC series is a series of high -precision voltage detectors developed using CMOS process. The
detection voltage is fixed internally with an accuracy of ±2.0%. Two output forms, Nch open-drain and CMOS
output, are available. Ultra -low current consumption and miniature package lineup can meet demand from the
portable device applications.

Pin Contiguous signal name Function description

1 RST Control signal voltage output pin

2 VDD Voltage input pin

3 NC Unused

4 VSS Grounding

3.5.11 Function introduction to TEA5767HN

The TEA5767HN is a single -chip electronically tuned FM stereo radio for low-voltage application with fully
integrated IF selectivity and demodulation. The radio is completely adjustment-free and only requires a
minimum of small and low cost external components. The radio can be tuned to the European, US and
Japanese FM bands.

Pin function is shown as the following figure：

Pin Contiguous signal name Function description

1 NC Unused
2 CPOP 　
3 VCOT1 Tuning output voltage oscillator 1
4 VCOT2 Tuning output voltage oscillator 2
5 VCOVCC Tuning oscillator power supply
6 DGND Digital ground
7 DVCC Digital power supply

-53 -

8 DATA Data pin (IIC serial data control)

9 CLOCK Clock pin (IIC serial clock control)
10 NC Unused

11 W/R Read/write control
12 BUSM Bus mode input

13 BUSEN Bus mode gating
14 SWP1 Software program port 1
15 SWP2 Software program port 2

16 XTAL1 Crystal oscillator input 1
17 XTAL2 Crystal oscillator input 2
18 PDLE

19 PHLE 　
20 NC Unused
21 NC Unused
22 LAVO Left channel audio voltage output
23 RAVO Right channel audio voltage output
24 TMUTE Software mute time constant
25 MPXO FM tuner MPX signal output
26 VREF Voltage reference
27 TCIFC IF adjusts time constant

28 DIFL1 Decouple IF limiter 1
29 DIFL2 Decouple IF limiter 2
30 NC Unused
31 NC Unused
32 IFGAI IF gain control
33 AGND Analog ground
34 AVCC Analog power supply
35 RFI1 F input 1
36 RFGND RF ground
37 RFI2 RF input 2
38 TCAGC RF auto gain control time constant
39 LOOPSW Phase-locked loop filter output gating
40 NC Unused

-54 -

Chapter Four

Disassembly and Assembly Process

In order to know structure of X21 (RU) more easily, directly and conveniently, now pictures are

adopted to present each link of the process of disassembly and assembly of the player before users to

prevent them operating incorrectly to damage elements. This player comprises the whole set, PLED

display screen, battery and tuning board. You are supposed to operate according to the illustrations

strictly.

Note: all operations must be with strict anti-static measures, operators must wear anti-static hand

wrist or gloves, electric screwdriver must be grounded effectively and articles of screwdriver and nippers

must be removed static electricity before use.

4.1 Whole set

4.1.1 Disassembly process of the whole set

1.Use electric screwdriver or “+” shaped screwdriver to unfix the 4 screws (A, B, C, D) in the joint

place of front casing and rear casing.

- 55 -

2.Exert strength with nails towards the upward arrow direction from the joint place of rear casing

aluminum alloy and middle casing (A, B) and take down rear casing.

3. Take down 4 rings (A, B, C, D)

4. Pull the middle casing (A) of USB jack outwards to take down main board.

- 56 -

4.1.2 Assembly process of the whole set

1. Install ON/OFF button (A), 3-direction button (B), volume control button (C) and lock button (D).

In order to prevent then from falling off in the course of assembly, you may use adhesive tape outside

the front casing to fasten when necessary.

2. Install main board into front casing. Pay attention to install one end of headphone jack firstly and

LOCK button (A) on main board must be aimed at the lock button cap on front casing.

3. Install 4 rings (A, B, C, D)

- 57 -

4. Install into rear casing and use electric screwdriver to fix 4 screws (A, B, C, D).

4.2 OLED display screen

4.2.1 OLED disassembly process

1.Take down main board and pull up display screen according to the direction shown in the

illustration.

2. Push away the 2 clasps according to the direction shown in the illustration, pull up display screen

data line and take down OLED screen.

4.2.2 OLED assembly process

Assemble according to the direction of disassembly process of OLED display screen.

- 58 -

4.3 Li battery

4.3.1 Li battery disassembly process

1. Take down rear casing, and take down battery according to arrow direction.

2. Use brand iron to weld out point A and B and take down battery

4.3.2 Li battery assembly process

1. Use brand iron to well weld point A and B and pay attention that point A is connected to anode of

Li battery and point B the cathode.

- 59 -

2. Fix the battery onto the sponge of main board battery location.

4.4 FM tuning board

4.4.1 FM tuning board disassembly process

Exert strength according to upward arrow direction from , B position with fingers and take down FM

board.

4.4.2 FM tuning board assembly process

Aim the FM tuning board at the 8pin socket on main board and insert FM tuning board. Pay

attention to the direction.

- 60 -

PCB board & Circuit diagram

X21 PCB Board

Chapter Cinque

Section One PCB board

- 61 -

FM_OUTL
FM_OUTR

VCC18

XTAL_VDDA18

HP_VDDA33

ADC_VREFP

ADC-VREFP

HP-VDDA33A

HP-VDDA33B

USB_GNDA

USB_VSSA_TERM

USB_VSSA_REF

R17

T16

R16

DAC_VREFP

DAC_VDDA33

DAC-VREFP

DAC-VDDDA33

MPMC

UART

GPIO

DC/DC

ADC_GNDA

DAC_VREFN

V2U1V1

M1

XTALL-VDDA18

XTALH-VDDA18

MPMC-STCS2
MPMC-STCS1
MPMC-STCS0

MPMC-CLKOUT

MPMC-BLOUT1
MPMC-BLOUT0

MPMC-RPOUT

ADC_VREF

ADC_VREFN

ADC10B_VDDA33

V10

SPDIF-VDDA33

ADC-10B-VDDA33

MPMC-D15
MPMC-D14
MPMC-D13
MPMC-D12
MPMC-D11
MPMC-D10

MPMC-D9
MPMC-D8
MPMC-D7
MPMC-D6
MPMC-D5
MPMC-D4
MPMC-D3
MPMC-D2
MPMC-D1
MPMC-D0

MPMC-A20
MPMC-A19
MPMC-A18
MPMC-A17
MPMC-A16
MPMC-A15
MPMC-A14
MPMC-A13
MPMC-A12
MPMC-A11
MPMC-A10

MPMC-A9
MPMC-A8
MPMC-A7
MPMC-A6
MPMC-A5
MPMC-A4
MPMC-A3
MPMC-A2
MPMC-A1
MPMC-A0

MPMC-DYCS

MPMC-CKE

MPMC-WE
MPMC-RAS
MPMC-CAS

MPMC-DQM1
MPMC-DQM0

MPMC_NOE

UART-TXD
UART-RXD
UART-CTS
UART-RTS

GPIO3
GPIO2
GPIO1
GPIO0

DCDC-PLAY
DCDC-STOP
DCDC-VBAT

DCDC-LX2

DCDC-LX1

DCDC-VUSB

ADC_VCOM

ADC_MIC_LNA

T3

T2

C16
106

VCC33

B8
C8
B7
C7
B6
C6
C5
C4

MPMC_AD7

B5

MPMC_AD6

A5

MPMC_AD5

B4

MPMC_AD4

A4

MPMC_AD3

A3

MPMC_AD2

B2

MPMC_AD1

A2

MPMC_AD0

A1

C13
B13
A13
C14
B14
A14
C15
B15
C16
B16
C17
B17
C18
B18
A18
D18
D17
D16
E18
E17
E16

B11
A8
C9
B9
A10
B10
C11
A9
C10
A11
C12
A17
B12
A12
B1

L3
K3
K2
K1

J16
K18
K17
K16

L17
L18
M17
N17
P17
T18

D_GND D_GND

HOLD

ALE
CLE

/RE

/WE

I_SET

PLAY/PAUSE 3

/STATUS 1
MUTE 1

HOLD
EN1

A1

LCD_RESET 3

OFF 1

SKRELGE010

SW1

L16

10K

SFI0402-050E100NP

P_GND

VCC33

C22
106

VCC33

LD2982/LP2985/S1167/PQ1X281M2ZP/TPS793285 SOT23-5

C39
106/X5R

P_GND

VCC33

R38

100K

/RE
/CE

CLE
ALE
/WE
/WP

C47

C48
SFI0402-050E100NP

C46 IC,C45 SW1

靠近 靠近

C23
106

D_GND D_GND

1

VI

VOUT

2

GND

3 4

EN BYPASS

U7

L15 601/1005

C45
104

ADC_VDDA33

VDDI

VDD_MPMC

VDD_I/O

D_GND

X1

C20
22PF

D_GND

KEY_SCAN_23
KEY_SCAN_13

BAT+

FM_OUTL

L10 601/1005

FM_OUTR

L11 601/1005

- 62 -

USB_DP3
USB_DM3

D_GND

HP_VOUTR3

HP_VOUTL3

R35 R34 IC!

、靠近

VCC33

R27 100K±1%

R29 180K±1%

C27 104

C32 220UF/6.3V

C33 220UF/6.3V

C36 105/0603

C37 105/0603

Q7
MMST3906

R36 10K

R37

1.5K±1%

USB_DET

IIC_SCL4
IIC_SDA4

C21
22PF

12MHz

D_GND

D_GND

R28 33K

R30 33K

C31 332

R77 3.9K
R78 3.9K

C34 104

R31 10R

C35 104

R32 10R

ADC_MIC3

R34

R35

IIC_SCL
IIC_SDA

LCD_WR3

1M

LCD_RD3
LCD_DB73
LCD_DB63
LCD_DB53
LCD_DB43
LCD_DB33
LCD_DB23
LCD_DB13
LCD_DB03
LCD_CS3
LCD_D/C3

A2

VCC33

R39
100K

/RESET1,3

1M

U6
PNX0101

R18

M16

N18H1V11

V16

V15E1V5

V14

J18

A16A7V18

VDDI1

VDDI2

VDDI3

VDDE1

VDDE2

VDDE3

VDDE4

VDDE5

VDDE6

FLASH-VDD-HV

DCDC-VOUTT18

DCDC-VOUT33A

XTALH-IN
XTALH-OUT

XTALL-IN
XTALL-OUT

SPDIF-IN

ADC10B-GPA4
ADC10B-GPA3
ADC10B-GPA2
ADC10B-GPA1
ADC10B-GPA0

DAC-VOUTR
DAC-VOUTL

HP-OUTR
HP-OUTL
HP-OUTCA
HP-OUTCB

ADC-VNR
ADC-VINL
ADC-MIC

LCD-RW-WR
LCD-E-RD
LCD-DB7
LCD-DB6
LCD-DB5
LCD-DB4
LCD-DB3
LCD-DB2
LCD-DB1
LCD-DB0
LCD-CSB
LCD-RS

MCI-DAT3
MCI-DAT2
MCI-DAT1
MCI-DAT0
MCI-CLK
MCI-CMD

USB-CONNECT
USB-DP
USB-DM
USB-VUSB
USB-RREF

DAI-BCK
DAI-WS
DAI-DATA

DAO-CLK
DAO-BCK
DAO-WS
DAO-DATA

JTAG-TRST
JTAG-TCK
JTAG-TMS
JTAG-TDI
JTAG-TDO
JTAG-SEL-ARM

IIC-SCL
IIC-SDA

RSTIN

DCDC_VSS1

P18

DCDC-VOUT33B

DCDC_VSS2

DCDC_GND

N16

L16

OSCIALLATORS

SPDIF

10-BIT ADC

DAC

ADC

LCD INTERFACE

MEMORY CARD
INTERFACE

USB INTERFACE

DA INTERFACE

JTAG

IIC MASTER
INTERFACE

RESET

DCDC_CLEAN

VSSI1

VSSI2

M18G1V12

V17F1V6

VSSI3

VSSE1

R109 1

VSSE2

VSSE3

V13

H18

AUDIO PLAYER
SYMPHONY

VSSE4

VSSE5

VSSE6

A15

A6

XTAL_VSSA

T9V8T11

T10

V9

V7

T8

T12

U5

T6

U6

T7

U7

M3
M2

P3
N3
N2
N1

T1
T4

R3

G2

F2
E3
E2
D3
D1
D2
C3
C1
C2
B3

F3

/WP

J3

R/B0

J1

J2
H3

/CE

G3
H2

T15
U17
T17
U14
P16

H17
G17
G16

F16
G18
F18
F17

T13

V4

U12

T5

U13

U4

H16

J17

T14

ADC_VDDA18

U18

U15

U16U3V3U2R1R2L1L2U9U8U11

ADC-VDDA33

ADC-VDDA18

USB-VDDDA33

USB-VDD18-BG

USB-VDDA18-PLL

USB-VDDA33-DRV

R109 1

HP_GNDAA

HP_GNDAB

STAL_GNDA

SPDIF_GNDA

ADC10B_GNDA

P2

P1

U10

C17
106

D_GND

R40
100K

L6 601
L7 601

L8 601

C29
106

5

C41
104

D_GND

C46
104

FLASH3V3

D_GND

L2 601

L3 601
L4 601

C40
106/X5R

D_GND

FLASH3V3

DAC_V33

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

VDDI

ADC_VDDA18
XTAL_VDDA18

R33 10R

L12 18R
L13 601
L14 10R

48

NC

47

NC

46

NC

45

NC

44

I/O8

43

I/O7

42

I/O6

41

I/O5

40

NC

39

NC

38

NC

37

Vcc

36

Vss

35

NC

34

NC

33

NC

32

I/O4

31

I/O3

30

I/O2

29

I/O1

28

NC

27

NC

26

NC

25

NC

D_GND

C19
104

C25
104

FLASH3V3

C26
104

MPMC_AD7
MPMC_AD6
MPMC_AD5
MPMC_AD4

D_GND

MPMC_AD3
MPMC_AD2
MPMC_AD1
MPMC_AD0

ADC_VDDA33

C30
104

C38
104

C43

C42

104

106

IC

分别靠近 各电源供应！

VDD_MPMC
VDD_I/O

ADC10B_VDDA33

C44
104

C18
104

C24
104

L9 601C28 332

TC58512FT

U8

1

NC

2

NC

3

NC

4

NC

5

NC

6

GND

7

RY/BY

8

RE

9

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

ADC_VREFP

DAC_VREFP
HP_VDDA33
DAC_VDDA33

5.2.1 main Board

Section Two circuit diagram

D_GND

R41

C49

C50

106

104

0R*

C51

C52

106

104

C53
102

USB1

Shield
Shield

GND

D+

VB+

3DU05S-32T-10

越靠近入口越好！

RCLAMP0504F/ SC-70 6L

2SJ-A382-001(HP-AC)
CN3

6
5
4
3
2

D-

1

4

5

362

1

GND

GND

142

D6

R51
0R

6
1
3
4
5

5

D5

RCLAMP0504F/ SC-70 6L

3

OUTL

FM_ANT

GND

SS8550LT

OUTR

FM_ANT

Q8

R44
1K

GND

L18
680 DCR<100mΩ

L27 106

L29 106

L28 106

USB_VBUS 2

R47 100K

R49

180K

靠近耳机插座

ADC_VDDA33

- 63 -

P_VDD

L24

601

C71

475/X5R/6.3V

VCC33

R71
100K

R59
100K

R60
470K

Q9
MMST3904

C60

106

MIC1

MICROPHONE

R73

0R

EN1

2

L25

CDRH3D16-4R7

5

VIN

4

EN

TPS61040/LM2703

VCC33

R61

2.2K

C61

ADC_MIC

D8

MBR0520/SOD123

ADC_MIC 2

R70

240K±1%

R75

27K±1%

VOLED

GND

C65

16V/104

C68

22P

L26

0R

106/25V/1206

C72

104

1

SW

2

GND

3

FB

U10

R42 18R

13

R43 18R

USB_DET 1

C56
104

U9

1

S1

2

G1

3 4

D2 S2

Si1912DL SOT-363/NT4401

R57 4.7K

R58
47K

LCD_3V3

L22
601

CN4

????

D5NCVCOMH

D3

IREF

VCC

713

9144

C63

103

R65

VOLED

2M

2

2

2

2

LCD_DB2

LCD_DB4

LCD_DB6

LCD_DB3

LCD_DB52LCD_DB1

LCD_DB7

24

T1

6

D1

5

G2

C59
103

RD#

D0D6D4D2D7

1321811172119

1268105

2

2

2

LCD_DB0

LCD_RD

R74
0R*

SDCW2012-2-900T

MUTE 2

D/C#

WR#

RES#

BS2D1CS#

BS1

15

16

R63

R64

4.7K

4.7K

2

2

2

LCD_WR

LCD_D/C2LCD_CS

R72
0R

/RESET

LCD_RESET

VDD

20

1,2

USB_DP 2

USB_DM2

GND

GND

LCD_3V3

2

C54
106

D_GND

IIC-SCL
IIC-SDA
FM-OUTL

VCC33

R54
1K

C57
104

D_GND

START1

SFI0402-050E100NP

R67

1K

C69
104

FM_3V3

C55
104

FM_3V3

R46

R45

10K

10K

C58
SFI0402-050E100NP

PLAY/PAUSE2

C62

SFI0402-050E100NP

SFI0402-050E100NP

C70

R48 601/1005
R50 601/1005

KEY_SCAN_2 2

PLAY

P_GND

C64

KEY_SCAN_1 2

VCC33

R62

100k

D7
1N4148WS

L23
601/1005

S2

START/PLAY/PAUSE

D_GND

IIC_SCL

IIC_SDA
FM_OUTL
FM_OUTR

PLAY/PAUSE

DAC_V33

L17 10UH/2012

CN2

D_GND

P_GND

HP_VOUTR 2

HP_VOUTL 2

R52

R53

1K

1K

VCC33

HOLD

0.3mm

内移

D_GND

R66

2

47K

1 3

C66

C73

104

SFI0402-050E100NP

A-B/REC

D_GND D_GND D_GND

SW2
MK12C02

C67

104

HOLD 1

R68
750R

S3

MENU

VOL-

FM_3V3

R55
300R

1

PREVIOUSNEXT

T

2

S4

D_GND

CON2X4

62
47

3 8

FM_ANT FM-OUTR

1 5

R56
220R

5C

PREVIOUS

S1

D_GND

VCC33

R69
510R

S5

VOL+

D_GND

VCC33

U2
G690L263T71/R3111N252CT1

VCC

GND

RESET

2

USB_VBUS3

P_VDD

R76
0R

P_GND

P_GND

USB_VBUS

/RESET 2,3

C5
SFI0402-050E100NP

USB5

D1
BAT43WS

3

1

P_GND

P_GND

C2
106/X5R

R3
68K

C8
106/X5R

U1

1

VIN

2

GND

3 4

EN BYPASS

TPS79301 SOT23-6

C6
102

P_GND

EN

P_GND

VOUT

FB

6
5

R2
C4
103

20K±1%

P_GND

U3

1

VI

2

GND

3 4

EN FB

TPS62200/FAN5307* SOT23-5

R1 33K±1%

C1 22PF

5

SW

L1
CDRH3D16/HP-100

R4
300K±1%C747PF

R5
120K±1%

C10
101

VCC33

P_GND

VCC18

C3
106/X5R

VCC33

C9
106/X5R

VCC18

P_GND

P_GND

D_GND

A_GND

R6

R7
1K

8
7
6

510K±1%

P_GND

100Ω

R20

G

靠近

R21

120K±1%

R26

100K

U4

R22

120K±1%

Q6

SS8050LT

P_GND

Q1
SI2305DS SOT23

D S

BAT1

BAT+ 2

CN1

1

BAT

2

C11
105/X5R

BAT2

P_GND

P_GND

S80829CNNB/S1000N29-N4T1/R3111Q291AT1 SC-82AB

P_GND

U5

4

RST

VSS

VDDNC

USB_VBUS3

C13
SFI0402-050E100NP

1

23

P_GND

R10
100K

R15
470K

P_GND

VCC33

D3

1N4148WS

Q3
SS8050LT

R17
100K

Q5
MMST3904

D2
1N4148WS

R11
100K

EN

R18 33K R19

C15
102*

P_GND

R24

P_VDD

100K

Q4

MMST3906

P_GND

- 64 -

P_GND

VCC33

R16
47K

/STATUS2

C12

105/X5R

P_GND

U4 ISL6294 DFN8

1

IN

2

PPR

3

CHG

4 5

EN GND

I_SET

BAT

IREF

IMIN

P_GND

R25 10K

Q2

MMST3906

R12
100K

C14
475/X5R

P_VDD

R13

5.6M

P_GND

R23 1M

R8
10K

R14
47K

2M

START

R9
10K

START

D4

1N4148WS

START 3

OFF 2

FM_3V3

5.2.2 FM Board

- 65 -

FM_3V3

R4
22R

C13
105/X5R/0402

SGND

FM_ANT

L2
33nH

L3
33nH

C1 101

C11 103

R7
22R

D1

BB202

D2

BB202

FM_3V3

L1
120nH

D_GND

C19
105/X5R/0402

C2 27PF

C4
47PF

R5
100K

SGND

R3
10K

C10
393

1
2
3
4
5
6
7
8
9

10

D_GND

C3
472

40

N.C

N.C
CPOP
VCOT1
VCOT2
VCOVCC
DGND
DVCC
DATA
CLOCK
N.C

W/R

111213141516171819

FM_3V3

RFI2

TCAGC

RFGND

LOOPSW

TEA5767HN

NECTAR-I

BUSM

BUSEN

SWP1

SWP2

RFI1

XTAL1

AVCC

XTAL2

AGND

PDLF

R2 18K

313233343536373839

N.C

IFGAI

DIFL2
DIFL1

TCIFC

VREF

MPXO

TMUTE

RAVO

LAVO

PHLF

N.C

20

R1
10R

106/X5R/0805

U1

30

N.C

29
28
27
26
25
24
23
22
21

N.C

SGND

FM_OUTR
FM_OUTL

XT1

32.768KHz

C7 473

C9 333

C14
102

D_GND

C6 473C5

C8 473

C12 333

SGND

SGND

SGND

SGND

C15
22PF

D_GND SGND

SGND

R6
33K

C16
223

SGND

SGND

C17
223

C18
102

SGND

FM_3V3

FM_OUTL
FM_OUTR

CN1
CON2X4

6 5
8 7

FM_ANT

12
34

IIC_SCA
IIC_SCL

D_GND

D_GND

IIC_SCL
IIC_SCA

Chapter six BOM List

MATERIAL

CODE

X21L（RU）SILVER WHITE（1G）

MAIN BOARD 5448402

0090324 SMD RESISTOR 1/16W 0O±5% 0402 R51,R72,R73,R76

0090001 SMD RESISTOR 1/16W 0O±5% 0603 L26

0090326 SMD RESISTOR 1/16W 10O±5% 0402 L14,R31,R32,R33

0090644 SMD RESISTOR 1/16W 18O±5% 0402 L12,R42,R43

0090339 SMD RESISTOR 1/16W 100O±5% 0402 R6

0090346 SMD RESISTOR 1/16W 220O±5% 0402 R56

0090349 SMD RESISTOR 1/16W 300O±5% 0402 R55

0090355 SMD RESISTOR 1/16W 510O±5% 0402 R69

0090362 SMD RESISTOR 1/16W 1K±5% 0402 R7,R44,R52,R53,R54,R67

0090369 SMD RESISTOR 1/16W 2.2K±5% 0402 R61

0090375 SMD RESISTOR 1/16W 3.9K±5% 0402 R77,R78

MATERIAL NAME SPECIFICATIONS LOCATION

0090359 SMD RESISTOR 1/16W 750O±5% 0402 R68

0090377 SMD RESISTOR 1/16W 4.7K±5% 0402 R57,R63,R64

0090385 SMD RESISTOR 1/16W 10K±5% 0402 R8,R9,R25,R36,R45,R46,L16

0090396 SMD RESISTOR 1/16W 33K±5% 0402 R18,R28,R30

0090400 SMD RESISTOR 1/16W 47K±5% 0402 R14,R16,R58,R66

0090404 SMD RESISTOR 1/16W 68K±5% 0402 R3

0090408 SMD RESISTOR 1/16W 100K±5% 0402

0090425 SMD RESISTOR 1/16W 470K±5% 0402 R15,R60

0090433 SMD RESISTOR 1/16W 1MO±5% 0402 R23,R34,R35

0090436 SMD RESISTOR 1/16W 2MO±5% 0402 R19,R65

0090443 SMD RESISTOR 1/16W 5.6MO±5% 0402 R13

0090639 PRECISION SMD RESISTOR 1/16W 1.5K±1% 0402 R37

0090672 PRECISION SMD RESISTOR 1/16W 20K±1% 0402 R2

0090485 PRECISION SMD RESISTOR 1/16W 27K±1% 0402 R75

R10,R11,R12,R17,R24,R26,R38,R39,R40,R
47,R59,R62,R71

0090671 PRECISION SMD RESISTOR 1/16W 33K±1% 0402 R1

0090509 PRECISION SMD RESISTOR 1/16W 100K±1% 0402 R27

0090681 PRECISION SMD RESISTOR 1/16W 120K±1% 0402 R5,R21,R22

- 66 -

MATERIAL

CODE

MATERIAL NAME SPECIFICATIONS LOCATION

0090645 PRECISION SMD RESISTOR 1/16W 180K±1% 0402 R29,R49

0090687 PRECISION SMD RESISTOR 1/16W 240K±1% 0402 R70

0090682 PRECISION SMD RESISTOR 1/16W 300K±1% 0402 R4

0090667 PRECISION SMD RESISTOR 1/16W 510K±1% 0402 R20

1030029

1030033

SMD PRESS SENSITIVITY
RESISTOR

SMD PRESS SENSITIVITY
RESISTOR

SFI0402-050E100NP

SDV1005H180C100GPT 0402

C5,C13,C47,C48,C58,C62,C64,C70,C73

①

C5,C13,C47,C48,C58,C62,C64,C70,C73

①

0310416 SMD CAPACITOR 50V 22P±5% NPO 0402 C1,C20,C21,C68

0310424 SMD CAPACITOR 50V 47P±5% NPO 0402 C7

0310432 SMD CAPACITOR 50V 101±5% NPO 0402 C10

0310704 SMD CAPACITOR 25V 102±10% X7R 0402 C6,C53

0310705 SMD CAPACITOR 25V 332±10% X7R 0402 C31,C28

0310453 SMD CAPACITOR 25V 103±10% X7R 0402 C4,C59,C63

C18,C19,C24,C25,C26,C27,C30,C34,C35,C

0310480 SMD CAPACITOR 10V 104±10% X5R 0402

38,C41,C43,C44,C45,C46,C50,C52,C55,C5
6,C57,C61,C66,C67,C69　　　　②

C18,C19,C24,C25,C26,C27,C30,C34,C35,C

0310790 SMD CAPACITOR

10V 104±20％ X5R 0402

38,C41,C43,C44,C45,C46,C50,C52,C55,C5
6,C57,C61,C66,C67,C69　　　　②

0310483 SMD CAPACITOR 10V 105±10% X5R 0603 C11,C12

0310674 SMD CAPACITOR 6.3V 475±10% X5R 0603 C14,C71

0310717 SMD CAPACITOR 6.3V 475±20% X5R 0603 C36,C37

0310486 SMD CAPACITOR 6.3V 106±20% X5R 0805 C2,C3,C8,C9,C39,C40

0310389 SMD CAPACITOR 10V 106 +80%-20% Y5V 0805

C16,C17,C22,C23,C29,C42,C49,C51,C54,C
60

0310753 SMD CAPACITOR 16V 104±20% X5R 0402 C65

0310752 SMD CAPACITOR 25V 106±10% X5R 1206 C72

0310736 SMD TANTALUMCAPACITOR 4V 220uF±20% 3528(B) C33,C32

0390142 SMD MAGNETIC BEADS FCM1608-601T02

L2,L3,L4,L6,L7,L8,L9,L13,L18,L22,L24,L27,
L28,L29

0390388 SMD MAGNETIC BEADS 600O/100MHZ±25% 1005 L10,L11,L15,L23,R48,R50

0390044 SMD INDUCTOR 10UH±10% 2012 L17

0390386 SMD CORES INDUCTOR 10uH±20% CDRH3D16/HP L1

0390384 SMD CORES INDUCTOR 4.7uH±20% CDRH3D16-4R7

0390387 SMD CORES INDUCTOR 4.7uH±30% CDRH3D16/HP

1090080 ESD ELEMENT RCLAMP0504F SC70-6L

1090084 ESD ELEMENT PLR0504F-P SC70-6L

L25　　　　③

L25　　　　③

D6,D5　　　　④

D6,D5　　　　④

- 67 -

MATERIAL

CODE

MATERIAL NAME SPECIFICATIONS LOCATION

0700154 SMD TRIODE 1N4148WS SOD-323 D2,D3,D4,D7

0680074 SMD SCHOTTKY DIODE BAT43WS SOD-323 D1

0680077 SMD SCHOTTKY DIODE MBR0520 SOD123 D8

0780298 SMD TRIODE MMST3904 SOD-323 Q9,Q5

0780299 SMD TRIODE SS8050LT SOD-323 Q3,Q6

0780293 SMD TRIODE MMST3906 SOD-323 Q2,Q4,Q7

0780300 SMD TRIODE SS8550LT SOD-323 Q8

0790041 SMD FIELD EFFECT TRANSISTOR SI2305DS SOT-23 Q1

0790068 SMD FIELD EFFECT TRANSISTOR SI1912 SOT363

0790070 SMD FIELD EFFECT TRANSISTOR NTJD4401N SOT363

0882475 IC TPS79301 SOT23-6

0882668 IC TPS79333DBVR SOT23-5

U9　　　　⑤

U9　　　　⑤

U1　　　　⑥

U1　　　　⑥

0882481 IC G690L263T71 SOT23-3 U2

0882476 IC TPS62200 SOT23-5 U3

0882851 IC ISL6294IRZ DFN U4

0882524 IC S80829CNNB SC-82 U5

0882403 IC PNX0101ET/N302 TFBGA U6

0882480 IC PQ1X281M2ZP SOT23-5

0882629 IC TPS793285DBVR SOT23-5

0882875 IC K9K8G08U0M-PCB0 TSOP

0883145 IC K9K8G08U0A-PCB0 TSOP

0882565 IC LM2703 SOT-23-5

0882999 IC FAN5331 SOT23-5

U7　　　　⑦

U7　　　　⑦

U8　　　　⑧

U8　　　　⑧

U10　　　　⑨

U10　　　　⑨

0882675 IC K9K4G08U0M-PCBO TSOP

0882619 IC K9K4G08U0M-YCBO TSOP

0883070 IC K9F4G08U0A-YCBO TSOP

0883101 IC K9K4G08U0A-YCBO TSOP

　　　　⑩

　　　　⑩

　　　　⑩

　　　　⑩

1310057 SMD STIR SWITCH SSSS811101 SW2

1340127

SMD LIGHT TOUCH
SWITCH(THREE DIRECTION)

SLLB310300 S1

1340128 LIGHT TOUCH SWITCH TS-1186 SW1,S2,S3

1340141 SMD LIGHT TOUCH SWITCH

TS-1112E-2(180 GRAM
PUISSANCE)

S4,S5

3810092 GROUNDING SPRING F3.2×8.5 F0.2 PLATING NICKEL P7,P8

- 68 -

MATERIAL

CODE

MATERIAL NAME SPECIFICATIONS LOCATION

1140070 MICROPHONE 44dB±3dB 4×1.5 WITH NEEDLE MIC1

1980050 EARPHONE SOCKET 2SJ-A382-001 CN3

1860085 USB SOCKET 2UB-M002-001 USB1

1940282 CABLE SOCKET

1970094 DULE FLAT NEEDLE

0960284

SMD CMETAL OXIDE FILM
RESISTORSTAL OSCILLATOR

21P 0.5mm SMD,SUBMIT MEET
WITH CLASP

2×4 5mm1.27mm STRINGHT
INSERT MOLD HIGH 1.5mm

12MHz±30ppm 5032/4 20P X1

1633235 PCB 2X21RUP-1

X21L（RU）SILVER WHITE（1G）

BATTERY BOARD 5446654

0090223 SMD RESISTOR 1/16W 2K±5% R2

0090011 SMD RESISTOR 1/16W 470O±5% 0603 R1

0310207 SMD CAPACITOR 50V 104 ±20% X7R 0603

0310543 SMD CAPACITOR 50V 104±10% X7R 0603

0882570 IC S-8261AANMD-G2N-T2 SOT23-6 U1

0790065 SMD FIELD EFFECT TRANSISTOR ECH8601 TSSOP

0790090 SMD FIELD EFFECT TRANSISTOR ECH8601R TSSOP

1632263 PCB EX9-0

CN4

CN2

C1,C2,C3　　　　⑾

C1,C2,C3　　　　⑾

U2　　　　⑿

U2　　　　⑿

X21L（RU）SILVER WHITE（1G）

FM MODULE 5448339

0310432 SMD CAPACITOR 50V 101±5% NPO 0402 C1

0310418 SMD CAPACITOR 50V 27P±5% NPO 0402 C2

0310706 SMD CAPACITOR 25V 472±10% X7R 0402 C3

0310424 SMD CAPACITOR 50V 47P±5% NPO 0402 C4

0310486 SMD CAPACITOR 6.3V 106±20% X5R 0805 C5

0310712 SMD CAPACITOR 10V 473±10% X5R 0402 C6,C7,C8

0310710 SMD CAPACITOR 16V 333±10% X5R 0402 C12,C9

0310711 SMD CAPACITOR 10V 393±10% X5R 0402 C10

0310453 SMD CAPACITOR 25V 103±10% X7R 0402 C11

0310480 SMD CAPACITOR 10V 104±10% X5R 0402

0310790 SMD CAPACITOR

10V 104±20％ X5R 0402 C13,C19　　　　⒀

C13,C19　　　　⒀

0310704 SMD CAPACITOR 25V 102±10% X7R 0402 C14,C18

0310416 SMD CAPACITOR 50V 22P±5% NPO 0402 C15

- 69 -

MATERIAL

CODE

MATERIAL NAME SPECIFICATIONS LOCATION

0310455 SMD CAPACITOR 16V 223±10% X7R 0402 C16,C17

0090326 SMD RESISTOR 1/16W 10O±5% 0402 R1

0090390 SMD RESISTOR 1/16W 18K±5% 0402 R2

0090385 SMD RESISTOR 1/16W 10K±5% 0402 R3

0090447 SMD RESISTOR 1/16W 22O±5% 0402 R7,R4

0090408 SMD RESISTOR 1/16W 100K±5% 0402 R5

0090396 SMD RESISTOR 1/16W 33K±5% 0402 R6

0700115 SMD TRANSFIGURATION DIODE BB202 D1,D2

0390112 SMD COIL THREAD INDUCTOR 33nH±5% 1608 L2,L3

0390326 SMD COIL THREAD INDUCTOR 120nH±5% 1608 L1

0882388 IC TEA5767HN HVQFN U1

0960279

1860088 FLAT FEMALE

SMD CMETAL OXIDE FILM
RESISTORSTAL OSCILLATOR

32.768KHz±20ppm SSPT6 12.5P XT1
4p 1.27mm DUAL RANK,SMD,MOLD

HIGH 2.1mm

1632993 PCB FX21RUP-0

X21L（RU）SILVER WHITE（1G）

BATTERY BOARD 5446654

0090223 SMD RESISTOR 1/16W 2K±5% R2

0090011 SMD RESISTOR 1/16W 470O±5% 0603 R1

0310207 SMD CAPACITOR 50V 104 ±20% X7R 0603

0310543 SMD CAPACITOR 50V 104±10% X7R 0603

0882570 IC S-8261AANMD-G2N-T2 SOT23-6 U1

0790065 SMD FIELD EFFECT TRANSISTOR ECH8601 TSSOP

0790090 SMD FIELD EFFECT TRANSISTOR ECH8601R TSSOP

1632263 PCB EX9-0

X21L（RU）SILVER WHITE（1G）

CN1

C1,C2,C3　　　　⒁

C1,C2,C3　　　　⒁

U2　　　　⒂

U2　　　　⒂

FM MODULE FX21RUP-0 5448339 1.1/

0310432 SMD CAPACITOR 50V 101±5% NPO 0402 C1

0310418 SMD CAPACITOR 50V 27P±5% NPO 0402 C2

0310706 SMD CAPACITOR 25V 472±10% X7R 0402 C3

0310424 SMD CAPACITOR 50V 47P±5% NPO 0402 C4

0310486 SMD CAPACITOR 6.3V 106±20% X5R 0805 C5

0310712 SMD CAPACITOR 10V 473±10% X5R 0402 C6,C7,C8

- 70 -

MATERIAL

CODE

MATERIAL NAME SPECIFICATIONS LOCATION

0310710 SMD CAPACITOR 16V 333±10% X5R 0402 C12,C9

0310711 SMD CAPACITOR 10V 393±10% X5R 0402 C10

0310453 SMD CAPACITOR 25V 103±10% X7R 0402 C11

0310480 SMD CAPACITOR 10V 104±10% X5R 0402

0310790 SMD CAPACITOR

10V 104±20％ X5R 0402 C13,C19　　　　⒃

C13,C19　　　　⒃

0310704 SMD CAPACITOR 25V 102±10% X7R 0402 C14,C18

0310416 SMD CAPACITOR 50V 22P±5% NPO 0402 C15

0310455 SMD CAPACITOR 16V 223±10% X7R 0402 C16,C17

0090326 SMD RESISTOR 1/16W 10O±5% 0402 R1

0090390 SMD RESISTOR 1/16W 18K±5% 0402 R2

0090385 SMD RESISTOR 1/16W 10K±5% 0402 R3

0090447 SMD RESISTOR 1/16W 22O±5% 0402 R7,R4

0090408 SMD RESISTOR 1/16W 100K±5% 0402 R5

0090396 SMD RESISTOR 1/16W 33K±5% 0402 R6

0700115 SMD TRANSFIGURATION DIODE BB202 D1,D2

0390112 SMD COIL THREAD INDUCTOR 33nH±5% 1608 L2,L3

0390326 SMD COIL THREAD INDUCTOR 120nH±5% 1608 L1

0882388 IC TEA5767HN HVQFN U1

0960279

SMD CMETAL OXIDE FILM
RESISTORSTAL OSCILLATOR

1860088 FLAT FEMALE

32.768KHz±20ppm SSPT6 12.5P XT1
4p 1.27mm DUAL RANK,SMD,MOLD

HIGH 2.1mm

CN1

- 71 -