BBK X19 service manual

X19(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

1

1

1

1

1

1

2

2

2

2

2

2

3

4

2.1 USAGE INTRODUCTION

2.2 USAGE INTRODUCTION

2.2.1 BUTTONS AND JACKS ILLUSTRATION

2.2.2 MAIN MENU ILLUSTRATION

2.2.3 PLAYING INTERFACE ILLUSTRATION

2.2.4 TUNING INTERFACE ILLUSTRATION

2.2.5 RECORDING INTERFACE ILLUSTRATION

2.3 BASIC OPERATION

2.3.1 INSTALL USB DRIVE PROGRAM

2.3.2 USE MOBILE STORAGE FUNCTION

2.3.3 DISCONNECT USB SAFELY

2.3.4 OMV VIDEO CONVERSION TOOL

2.3.5 MAKE PICTURE

2.3.6 BROWSE/CANCEL FILE

2.3.7 PLAY MUSIC

4

4

4

5

6

6

6

7

7

7

7

7

8

8

9

2.3.8 A-B REPEAT FUNCTION

9

2.3.9 RECORDING

2.3.10 TUNING

2.3.11 UPGRADE

2.4 ADDITIONAL INFORMATION

2.5 SPECIFICATION

Chapter Three Servicing and Principle

section One Principle of the Player

3.1.1 Function introduction

3.1.2 Block diagram of the player

3.1.3 Introduction to IC used by the player

Section Two Unit Circuit Principle

3.2.1 FLASH circuit principle

3.2.2 FM tuning circuit

3.2.3 OLED module circuit

9

10

11

11

11

12

12

12

12

13

14

14

15

16

3.2.4 Buttons circuit

3.2.5 Headphone jack circuit

3.2.6 Charge control circuit

3.2.7 Battery protection circuit

3.2.8 Power circuit

3.2.9 Reset circuit

3.2.10 Power on/off control circuit

3.2.11 Microphone circuit

3.2.12 USB jack circuit

3.2.13 RTC circuit

Section Three Servicing Cases

3.3.1 Servicing cases

3.3.2 Troubleshooting flow chart

Section Four Waveform diagram

Section Five Function Introduction to IC

17

17

18

19

20

21

22

22

23

24

25

25

28

33

40

3.5.1 Function introduction to PNX0102AEX

3.5.2 Function introduction to HY27UG088G5M

3.5.3 Function introduction to TPS79301

3.5.4 Function introduction to G690L263T71

40

51

53

54

3.5.5 Function introduction to TPS62200

55

3.5.6 Function introduction to Lm2703

3.5.7 Function introduction to TEA5767HN

3.5.8 Function introduction to ISL6294IRZ

3.5.9 Function introduction to PIC10F200T

3.5.10 Function introduction to PQ1X281M2ZP

3.5.11 Function introduction to Si1912

3.5.12 Function introduction to Si1912

Chapter Four Assembly and Disassembly Process

4.1 Disassembly process of the player

4.2 Assembly process for the player

Chapter Cinque PCB board & Circuit diagram

Section One PCB board

Section Two circuit diagram

56

57

59

61

62

63

63

65

65

68

71

71

73

Chapter six BOM List

74

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 FUNCTIONS AND FEATURES

# Philips PNX0102audio decode chip

Adopt famous Plilips PNX0102 audio decode chip, special for Hi-Fi MP3 player, forcefully making

up audio signal loss when compressing MP3 to revert audio signal better.

# Support 3D surround stereo sound effect, 9 EQ modes

You may taste heartquaking bass and vivid surround stereo sound effect.

# Play MP3/WMA/WAV files

Support 32kbps 320kbps MP3 file and 8kbps 192kbps WMA file.

# Mobile storage function

Capable of downloading files from Windows resource manager.

# FM tuning/FM recording function

Auto scanning and auto/manual saving function may listen to FM radio station program more easily.
You may record FM program into Mp3 file directly.

# Voice recording function

May be used to record in class, meeting and interview.

# USB 2.0 transmission (high speed)

USB2.0 high speed data transmission.
# Support firmware upgrading function
Support upgrading function. You may add new function to the built-in program of this player

Conveniently.
# Support multi-level directory
Support 11-level 256 folders and 3000 flies at most.

2.2 USAGE INTRODUCTION

2.2.1 BUTTONS AND JACKS ILLUSTRATION

#

Press for long in power-off mode

#

press for long in power-on mode

#

Press in playback interface

#

Press when recording

#

Press when tuning

- 4 -

power on
power off
switch in pause/play
pause recording
mute

Press when operating menu

#

Press in stopwatch timing

#

Press in playback interface

#

Press for long in playback

#

interface

Press in tuning PRESET mode

#

Press for long in tuning PRESET

#

mode

Press in tuning SCAN mode

#

Press for long in tuning SCAN

#

mode

When operating menu

#

Press or for long in “My EQ”

#

Press or for long when browsing

#

E-books

Press when browsing pictures

#

enter the selected item or confirm setup
Pause
previous/next track

fast backward/forward
select channel

full auto scanning
manual scanning

automanual scanning
move cursor or set item
select the frequency point you want to set

turn pages
switch pictures

# Press for long in any mode
(except recording)
# Press when tuning
# Press when operating menu

# Press or for long in playback
interface or when tuning
# Press in “My EQ” setup
# Press or for long when setting
screen saver or timing power off
# Press when setting clock
# Press when setting 3D

USB jack, power adapter, LINE IN jack

# Press in playback mode
# Press for long in any time
# Press long when listening radio
set
# Press in file browsing interface
# Press when in
antomanual/manual scanning
# Press when browsing E-books
Headphone jack
MIC: microphone

Enter main menu
switch in PRESET and SCAN mode
not save the setup and return to the previous
menu

adjust volume
adjust dB value

adjust screen saver/timing power off time
set time
adjust subwoofer

A-B reread
record/generate recording file

enter FM recording/generate recoding file
cancel file

save radio station
adjust page number

2.2.2 MAIN MENU ILLUSTRATION

# My Music
save music file/FM recording file/LINEIN recording file
# My Movie
save movie file

- 5 -

# My Photo
Save picture file
# My Ebook
Save text file
# FM Radio
Select “FM Radio” to enter its mode
# My Voice
Save microphone recording file, such as
meeting, classroom and interview

2.2.3 PLAYING INTERFACE ILLUSTRATION

# Calendar
Select “Calendar” to enter its mode
# Stopwatch
Select “Stopwatch” to enter timing mode
# SYS Setup
Select “SYS Setup” to set system items

1

Current track sequence number

2

Total track number

3

Playback status

4

Sound effect mode

5

Playback mode
Battery capacity

6

7

8

9

2.2.4 TUNING INTERFACE ILLUSTRATION

1

Dual channel

2

Battery capacity
Frequency of currently-listening

3

radio station
Scanning progress bar

4

.

5

6

2.2.5 RECORDING INTERFACE ILLUSTRATION

Bit rate
Song name/singer/lyrics display
Current playback time
Playback progress bar
Music spectrum display

PRESET channel display
PRESET mode (normal listening)
SCAN mode (scanning)
Mono channel

.

.

1

Battery capacity

2

Time that has been recorded
Record file name

3

Recording/pause

4

The left recordable time

5

.

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.

- 6 -

2.3 BASIC OPERATION

2.3.1 INSTALL USB DRIVE

PROGRAM

If your computer is Windows 98, you must
install drive program if you want to use the
mobile storage function of MP3 player in
computer.

1. Place USB drive disc into CD-ROM driver

of computer.

2. Connect Mp3 player to computer, and the
computer will automatically indicate that new
firmware device has been found, and run the
installation guide, shown as the following figure.
You only need to find the drive information file on
disc according to prompt information to finish the
installation of drive program.

3. After installation finishes, restart the
computer and you may use the mobile storage
function normally.

Shown as the following figure:

.

NOTE: NOTE:

# To avoid abnormality of the player appears, you

.

are suggested to power off firstly before
connecting MP3 PLAYER with computer, and
then use USB
# transmission line to connect MP3 PLAYER,
then connect computer.

In Windows 98 system, there is no “ ”symbol.

2.3.3 DISCONNECT USB SAFELY

After operation finishes, click " “ symbol on
bottom right corner of Windows desktop
with right button of mouse, and disconnect USB
safely according to the computer prompt.

2.3.2 USE MOBILE STORAGE
FUNCTION

This player can be used as mobile storage in
Windows ME/2000/XP operating system. In
Windows 98SE and Mac operating system,
random drive program must be installed firstly
and then used as mobile storage.

Connect MP3 PLAYER and computer with

USB transmission line. After the bottom right
corner of desktop appears “ ” symbol, the

mobile storage function of Mp3 PLAYER

.

2.3.4 OMV VIDEO CONVERSION

TOOL

1. General description
Before using, please install DirectX 9.0 and
upgrade Windows Media Player to 9.0 or
version above this. Usage platform:
Windows2000, Windows XP

2. Explanation of help
Basic operation:

The interface after
program running:

2. Select a file to
open in “Open”
dialogue box.

1.Click “File” menu and
select “ OpenFile”.

.

3.Now set to save file
path and file name,
with steps the same as
above..

- 7 -

1. After the setup of
saving file path is
successful, click icon
to begin conversing.

After conversion
finishes, the hint of
“Conversion
Succeed”will appear.

Conversion setup:
Before conversion, you may perform the
setup of parameter conversion. Click icon to

pop up dialogue box and perform parameter
setup of VideSize, PlaydFrame, AudioBits,
Intercept Segment.

1.VideoSize:may be set
according to the screen
size of MP3.As the
following figure, screen
size is

2.PlaydFrame:the
played frame rate of
each second during
file conversion maybe

set.
96(length)*64(width)an
d unit is pixel spot.

Note:

1.If DirectX 9.0 still can not run after installation
finishes, Open 'Display Properties' in the
Control Panel of PC, Click the 'Settings' tab,
Click on the 'Advanced' button at the bottom of
the page, Click on the 'Troubleshooting' tab in
the window that appears, Verify that the
'Hardware Acceleration' slider is at the rightmost
position.

2.If the playback of video file after conversion
appears halt, you may turn off other application
programs to run conversion program again.

2.3.5 MAKE PICTURE

Install MakePic, download MakePic from
SOKEN website or copy the installation program
file of MakePic from the attached present disc.
Click “Setup exe” twice and then finish the
installation according to prompt.
How to make picture:

1. MakePic running
Click “Start” Program MakePic runs the

tool of making picture.

2. After opening the program of making picture,

click “File” “Open photo”,
shown as the following figure:

3.AudioBits:bit rate of
music during file
conversion may be set.

4.Intercept Segmen:a
segment may be

intercepted in video to
conduct conversion. As
in the following figure,
input starting time

Point and finish time
point, for instance,

intercept the segment
between 10 seconds
and 1minutes plus 30
seconds; if you do not

Select, it means the
whole segment is
intercepted(note:for
some ASF, WMA file,
the starting point of
intercepted segment
is from 0).

3. Click “Zooming zone” button to select your
desired picture zone. Click “Save” icon to
generate BMP format picture.

2.3.6 BROWSE/CANCEL FILE

# BROWSE FILE
In any case, press button for long to enter

M

“Main Menu”. Musical file and recording file are
separately saved in the two items of main menu
“My Music” and “My Voice”. Press button

/

to select upward or downward to browse files.

M

PRESS
FOR LONG

PRESS

PRESS

- 8 -

#CANCEL FILE

A-B

A-B

A-B

PRESS

A-B

M

When browsing files, press button and
the cancel dialogue box will pop up. Press

/

button to select “Yes” and press
button to cancel the file. Select “Esc” or
button to exit.

PRESS

#ADJUST VOLUME

When playing or tuning, pressing
button or for long may both adjust volume. The
display of adjusting volume in music playback
interface is shown as follows:

Note: File data cannot be cancelled when
playing musical and recording files.

2.3.7 PLAY MUSIC

#PLAY MUSIC
Press button to select song in “My
Music”. Press button to begin playing music,
and meanwhile the playback interface displays.
#PAUSE MUSIC
When playing, press button to switch to
pause state. Press button again to continue
playing.

#NEXT and PREV
When playing, pressing button may skip
to the next track to play; and pressing
button may skip to the previous track to play.
#FF and FB
When playing, Pressing button for long
without losing may realize fast forward.

/

PRESS

A-B

/

M

A-B

NOTE:

NOTE:

#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.

2.3.8 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 “A”;press it for
the second time to select the ending point that
you desire to repeat play and screen displays
"A-B”, and system begins to repeat play
between A-B segment. Press this button for the
third time to cancel repeat and continue to play.

PRESS

PRESS

PRESS

PRESS
FOR LONG

#FF and FB
When playing, Pressing button for
long without losing may realize fast backward.

PRESS
FOR LONG

NOTE:

NOTE:

When in FB/FF operation, if you press
button for long without losing, the state is still
FB/FB after entering the next track.

2.3.9 RECORDING

In any cases, press button for long to enter
recording mode; pressing button may
pause recording and pressing button for
long may generate recording file and then exit.

PRESS

NOTE:

#To avoid sudden power-off when recording,
you cannot record when in low battery and
when disc is fully written. If you are recording, it
indicates "FULL DISC" and exits recording.

- 9 -

PRESS

# When recording with microphone, if you press
buttons and the sound of pressing may probably
be recorded.
# Select recording format “MIC”/“LINEIN” when
recording.

# LINEIN RE RECORDING
Firstly select LINEIN in “SYS Setup”--- “REC
Set” --- “REC Source”, and then connect LINEIN
input jack of MP3 PLAYER to the headphone
output jack of DVD or CD player with LINEIN
cord, and then enter recording according to
above operation steps. The output audio signal
of DVD or CD player can be re recorded into
MP3 file (The output signal of any device with
headphone output can be re recorded into MP3
file through this player.).

NOTE:

When in LINEIN recording, if external sound
source input extent is too large, the playback of
files after being re recorded will have distortion
and noise. Please adjust
the external sound source to proper volume.

2.3.10 TUNING

# ENTER TUNING MODE
Select "FM Radio" in main menu and press
button to listen to radio.
# QUIT TUNING MODE
When listening to radio, press button for
long to return to main menu.
# PRESET/SCAN MODE SWITCH
When listening to radio, press button to
switch between PRESET and SCAN mode.

1. PRESET MODE
#ADJUST CHANNEL
Press button to enter the next channel,
and press button to enter the previous
channel.
#FULL AUTO SCANNING
In PRESET mode, press or button
for long to begin full auto scanning. All scanned
radio stations will be saved automatically.

PRESS
FOR LONG

2. SCAN mode
#MANUAL/AUTOMANUAL SCANNING
Press button to increase 0.1MHz each
time; and press button to decrease 0.1
MHz each time.
Press button to save radio station and

A-B

switch to PRESET mode.
Press button for long to increase
frequency continuously and stop until radio
station has been searched. Press button to

A-B

save radio station.
Press button for long to decrease
frequency continuously and stop until radio
station has been searched. Press button

A-B

to save radio station.

#SAVE RADIO STATION
In manual scanning mode, pressing
button may save the current radio station; in
automanual scanning mode, pressing
button after radio station is searched may also
save the ratio station. Press button to mute.

PRESS

PRESS

NOTE: NOTE:

PRESS

In the course of full auto/automanual

M

scanning, press or button will stop

M

searching.

- 10 -

/

#FM RECORDING
When listening to radio set, press
button for long to enter FM recording; press
button to pause recording; press button for
long to generate recording file and then exit to
tuning mode. The file generated by FM
recording is MP3 format.

PRESS
FOR LONG

PRESS

NOTE: NOTE:
When using FM, please pull up LINEIN cord to

avoid the sound mixing of LINEIN and FM.

2.3.11 UPGRADE

# UPGRADE
Download the latest firmware updating file
from BBK website firstly, such as
"BBK_X19RU.ebn" and "X19RU_Resource.bin",
copy the two files into root directory of Mp3
PLAYER at the same time, and then power on
again. Find "Upgrade” item in “SETTINGS", and
pressing button may start updating. After
updating finishes, MP3 PLAYER will power on
again.

PRESS

# After firmware updating finishes, some
function or interface may probably be different
from user manual, so please take real object as
standard.

# After updating finishes, blank screen may
probably appear for about 30 seconds, which
means MP3 is updating resources.

2.4 ADDITIONAL INFORMATION

# The longest playback time
In the state of proper volume , "NORMAL"
sound effect and screen saver, play MP3 music
file with 128kbps, and 44.1kHz, the longest
playback time of this player is about 8 hours.
In other cases, playback times will be different.
# Accessories
.Headphone
.Hanging necklace
.USB drive disc
.User manual
.USB transmission line
.Warranty card
.LINE-IN cord
.Protection case
# The lowest computer configuration
requirements
.Above Windows98SE/2000/XP/ME,Mac8.5
.Pentium 200MHz centre processor or above
.CD-ROM drive
.40MB spare hard disc space
.32MB EMS memory
.USB jack

NOTE:

# Make sure MP3 PLAYER has enough quantity
of electric charge before updating.
# To ensure successful firmware updating, do
not power off during the course of updating.
# Updating will last for about one minute, please
try your best not to operate other buttons during
this course.
# After updating finishes, the player will power
on automatically and meanwhile cancel the
used updating file at the same time.

2.5 SPECIFICATION

Model

Audio decode chip

Lithium battery

Continuous playback time

Dimensions/weight

Audio SNR

Headphone output

Frequency range

FM tuning range

Working temperature

Files supported

- 11 -

X19 Color

Philips PNX0102

3.7V 320mAh

The longest continuous playback time is 8 hours.

62mm X 33mm X 10.5mm about 33g

90dB

9mW+9mW 32 ohm (18mW+18mW headphone impedance 16 ohm)

18Hz~20kHz

87.5MHz~108MHz

0 C ~ 40 C

MPEG 1/2 Layer 3 (32kbps~320kbps),
WMA (8kbps~192kbps), WAV

Chapter Three Servicing and Principle

Section One Principle of the Player

3.1.1 Function introduction

1. Mp3 main decode chip, which adopts professional MP3 decode chip PNX0102 of Philips

company, with integrated ARM and DSP core inside. Sound quality is good and power consumption is

low.

2. USB jack circuit: USB jack, data exchange.

3. Flash circuit: data storage of the player.

4. OLED circuit: 1’ colorful screen, display of working state of the player.

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

3.1.2 Block diagram of the player

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

32.768K

CRASTAL

HEADPHONES

ANTI-POP CIRCUIT

IMPEDANCE MATCH

MICROPHONE

USB INTERFACE

3V-12V DC-DC

CONVERTER

OLED MODULE

FM MODULE

SRAM

PNX 0102

NAND

FLASH MEMORY

LDO MODULE

2.8V
VOLTAGE

1.8V

VOLTAGE

BUTTON ARRAY

RESET CIRCUIT

12M CRYSTAL

3.0V VOLTAGE

1.8V

DC-DC

POWER

MANAGEMENT

LI-ON BATTERY

RECHARGE

CIRCUIT

USB INTERFACE

3.3V

DC-DC

Figure 3.1.2.1 block diagram

- 12 -

3.1.3 Introduction to IC of the player

IC model Location Function

ISL6294IRZ DFN U1 Charg e managemen t

PNX0102AET U2 MP3 decode

TPS79301 U3 Prec ision voltage s tabil izer

TPS62200 U4 Prec ision voltage s tabil izer

PQ1X281M2ZP U5 Prec ision voltage stabilizer

PIC10F200T-I U6 Voltag e detect

M41T62 U7 RTC chip

G690L263T71 U8 Reset IC

HY27UG088G5M U9 Flash

LM2703 U10 12V boost

CS26LV16163HI U11 SDRAM

TEA5767HN U12 TuningIC

RCLAMP0504F U13 ESD protec tion

Introduction to IC of the player is shown as in the following table:

- 13 -

Section Two Unit Circuit Principle

3.2.1 FLASH circuit

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

3.3V

NC
NC
NC
NC
NC

RE

NC

NC
NC

WE
WP

NC
NC
NC
NC
NC

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

R52

47K 5%

C40

SM_A3
SM_A2
SM_LB
SM_WPN

R61

100K

DGND

R53

47K 5%

3.3V

104 6.3V/X5R

DGND

SM_A3
SM_A2
SM_LB
SM_WPN

%

5

R54

47K 5%

SM_RDY
SM_OE
SM_CS0
SM_CS2

SM_RDY
SM_OE
SM_CS0
SM_CS2

SM_D7
SM_D6
SM_D5
SM_D4

C38

104 6.3V/X5R

SM_D3
SM_D2
SM_D1
SM_D0

3.3V

DGND

SM_D7
SM_D6
SM_D5
SM_D4

SM_D3
SM_D2
SM_D1
SM_D0

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

NC
NC
NC
NC
I/O7
I/O6
I/O5
I/O4
NC
NC
PRE
VCC
VSS
NC
NC
NC
I/O3
I/O2
I/O1
I/O0
NC
NC
NC
NC

U9

R/B2
R/B1

CE1
CE2

VCC
VSS

CLE
ALE

Figure 3.2.1.1 Flash circuit schematic diagram

2. Working principle: Flash Memory is the storage unit of the player, all MP3 and waveform files

should be stored in FLASH. Flash module is composed of FLASH chip TC58512FT and peripheral circuit

to finish internal files’s working of read, write and delete. 3.3V voltage circuit provides 3.3V voltage for

Flash working. R53 and R54 is pull up resistor of /CE1 and CE2, R52 is pull up resistor of R/B1, R61 is

the pull down resistor of /WP,Vcc is power supply pin of FLASH, /CE is chip selection signal, high level is

effective, VCC33 provides 3.3V voltage and FLASH begins to work. /RE, /WE are read effective and

write effective signal end respectively to control read and write function of FLASH. I/O1 - I/O8 are 8 data

lines to complete the exchange of FLASH and external data to realize functions of write, delete and edit

of MP3.

When MP3 is powered on, 3.3V voltage supplies power for Flash through Vcc, /CE inputs 3.3V high

level signal and Flash begins to work effectively. When MP3 is playing musical and recording files, /RE

is high level, Flash performs read operation. When writing files in through data line o recording through

microphone, /WE is high level, Flash performs write in operation. Working of read out and write in are

performed through I/O1 I/O8 8 data/address lines. When playing video, data in Flash is processed by

PNX0102 and then the continuous video output is realized through SDRAM U11 cache.

- 14 -

3.2.2 FM tuning circuit

1. FM tuning circuit diagram is shown in the figure 3.2.2.1;

R62

C76

FM_3V3

SGND

RF

RF

L12

C54

L13

C75

D6

D7

FM_3V3

R63

SGND

BB202

BB202

C77

L14

C83

SGND

R16

C64

SGND

R5

C85

R30

R31

C84

40

37

38

39

N.C

1

N.C

2

CPOP

3

VCOT1

4

VCOT2

5

VCOVCC

6

DGND

7

DVCC

8

DATA

9

CLOCK

10

N.C

SGND

TCAGC

LOOPSW

W/R11BUSM12BUSEN13SWP114SWP215XTAL116XTAL217PDLF18PHLF19N.C

R32

3.3V

R58

FM_3V3

32

33

34

35

36

RFI1

RFI2

AVCC

AGND

RFGND

TEA5767HN

NECTAR-I

FM_BUSEN

FM_BUSEN

R59

FM_SCL

FM_SDA

R73

SGND

31

U12

N.C

IFGAI

N.C
DIFL2
DIFL1

TCIFC

VREF

MPXO

TMUTE

RAVO
LAVO

N.C

20

32.768KHz

FM_SCL

FM_SDA

X3

C57

30
29
28
27
26
25
24
23
22
21

SGND

C89

C90

C91

C92

SGND

C93

1

C49

2

SGND

5767R

5767L

SGND

R74

C80

SGND

5767R

5767L

SGND

C81

C58

SGND

Figure 3.2.2.1 FM tuning circuit diagram

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

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

with value 2.8V for IC. C75, C83, C64, C84, L14 are antenna input match circuit of FM module; variable

diode D6, D7 and winding inductor L12, L13 are selection tuning circuit in FM module. Control means of

FM adopts IIC bus control means, 8, 9 of TEA5767 are data line and control line.

When MP3 player switches to FM tuning state, pin 13 BUSEN of TEA5767HN receives high level

signal, bus control mode is gated, IC begins to work. As antenna, headphone receives FM signals from

nature, through antenna input matching circuit, input TEA5767HN, PNX0101 via RFI1 and RFI2 to

control TEA5767HN to perform intermediate frequency and selected frequency control through IIC_SCL

and IIC_SDA to transform FM signals to sound simulating signals and then is outputted by FM_OUTR

and FM_OUTL to ADC circuit of PNX0102 and then output through headphone after DAC processing.

- 15 -

3.2.3 OLED module circuit

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

LCD_CS
LCD_RES
LCD_RS
LCD_RW
LCD_RD
LCD_D0
LCD_D1
LCD_D2
LCD_D3
LCD_D4
LCD_D5
LCD_D6
LCD_D7

R69

1 50K 5 %

C82

475 6.3V/X5R

OLED_POWER

P_VDD

DGND

OLED_POWER

DGND

5

4

R20

47K 5%

L2

CDRH2D11/HP-4R7

U10

VIN

SW

GND

EN

FB

LM2703

1

2

3

MBR0520

DGND

D8

R70

470K 1%

R71

43K 1%

DGND

C87

22PF 25

V

DGND

LCD_CS
LCD_RES
LCD_RS
LCD_RW
LCD_RD
LCD_D0
LCD_D1
LCD_D2
LCD_D3
LCD_D4
LCD_D5
LCD_D6
LCD_D7

Q7

MMST3906

C88

475 16V/Y5V

DGND

104 6.3V/X5R

104 6.3V/X5R

C9

R68

1M 5%

105 16V/X7R

L17

600R/100MHz

3.3V

C86

R6
R7

DGND

DGND

10k 5%
10k 5%

DGND

1
2
3
4
5

C36

6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

C12

475 16V/Y5V

NC
GND
TESE0
TEST1
TEST2
TEST3
TEST4
VP_R
VP_G
VP_B
VDD
BS1
BS2
IREF
CS#
RES
D/C
WR
RD
D0
D1
D2
D3
D4
D5
D6
D7
NC
VOCMH
VCC
NC

OLED

1

J3

tp7

Figure 3.2.3.1 OLED circuit schematic diagram

2. Working principle: 12V high voltage is required to lighten OLED and matching circuit must be

matched to finish. The circuit includes two parts: boosted circuit and OLED jack circuit, in which boosted

circuit is constituted by boosted DC-DC LM2703 and peripheral circuit, VIN is power input, EN is

Lm2703 enable end, high level is effective, SW is high voltage output pin, FB is feedback pin,

voltageValue VOLED outputted by high voltage is achieved through selecting two voltage partial resistor

on two ends of FB, and the following relation is met:

From the above, VOLED is about 12.2V and L2 in the circuit is IES of boost circuit.

3.3V voltage inputs to LM2703 through Vin, EN receives high level to make LM2703 effective, 3.3V

voltage is outputted by SW pin through LM2703 boost and inputs to C electrode of triode Q7, Q7 is

connected, 12V voltage outputs to power supply pin 30 of OLED to provide OLED with lightening voltage,

diode D8 is used to prevent reverse current damaging IC. During the process of working, FB feedback to

LM2703 through detecting capacitor C87 to control the output voltage through adjusting resistor R70

and R71.

- 16 -

OLED jack circuit is connected with OLED of PNX0101 directly, through data exchange of

LED_DB0~LED_DB7 and PNX0102, character display is controlled by internal program of PNX0102.

Pin 16 of OLED is reset signal and controlled by one MPMC jack of PNX0102. When power on, high

level outputs and OLED resets.

3.2.4 Buttons circuit

1. Buttons circuit is shown in the figure 3.2.4.1:

3.3V

R49

47K 5%

R50

47K 5%

DFU

SW1

SW1

SW2

SW3

SW4

SW5

SW6

SW7

TS-1186

DGND

TS-1186

TS-1186

TS-1186

TS-1186

TS-1186

TS-1186

R51

1K 5%

3.3V

SCAN_C1

SCAN_C2

SCAN_C3

SCAN_C4

SCAN_C5

SCAN_C6

SCAN_C7

SCAN_C1

SCAN_C2

SCAN_C3

SCAN_C4

SCAN_C5

SCAN_C6

SCAN_C7

R45

47K 5%

R46

R47

47K 5%

47K 5%

D5

1N4148WS

R48

47K 5%

Figure 3.2.4.1 Buttons circuit schematic diagram

2. Working principle: buttons of X19 (RU) are composed of 7 single buttons (one is DFU button).

Button detecting is to use voltage detecting mode to decide which button functions through utilizing

PNX0102 to scan the voltage variation of SCAN_C1~SCAN_C7. When the relevant button is pressed,

voltage of the corresponding preset point of this button will pull down to ground through the

corresponding resistor in R45~R50. Low voltage is inputted to the corresponding detect circuit input jack

of PNX0102 and the internal program makes the corresponding response to realize button function.

3.2.5 Headphone jack circuit

1. Headphone jack circuit is shown in the figure 3.2.5.1:

J1

2SJ-A390-A02

MUTE

tp5

tp6

1

1

3

4

2

1

RF

L7

L11

L16

RF

47K 5%

1K/100MHz

1K/100MHz

1K/100MHz

DGND

R13

DGND

4.7K 1%

Q5

1

S1

4

S2

NTJD4401

U13

RCLAMP0504F

Figure 3.2.5.1 Headphone jack circuit schematic diagram

R14

G12G2

34
25
16

5

MUTE

D1
D2

- 17 -

6
3

DGND

DGND

DGND

R43

1K 5%

R44

1K 5%

C65

C66

220UF

220UF

R56

18R 5%

4

V

C67

103 16V / X 7R1 %

4

V

DGND

C68

DGND

R55

18R 5%

103 16V / X 7 R1 %

R_OUT

L_OUT

R_OUT

L_OUT

2. Working principle: left and right channels audio signals outputted from PNX0102 , through 220uF

C65 C66 capacitor coupling output, are sent to headphone jack circuit. Headphone jack circuit is

composed of the dual MOS tube NT JD4401 and headphone socket J1 that control sound output. Pin 2

and 5 of NTJD4401 are connected to mute circuit. When MUTE button is pressed, control dual MOS

tube is disconnected to cut the output of left and right channels of headphone. in circuit

RCLAMP0504F

is TVS diode array, used to protect ESD to prevent external static from damaging internal circuit through

headphone jack. Ground wire of headphone is also used as antenna input of FM tuning.

3.2.6 Charge control circuit

1. Charge control circuit fulfills the charge function to lithium-ion battery and circuit diagram is

shown in the figure 3.2.6.1:

tp1

D2

DGND

BAT

IREF

IMIN

GND

MBR0520

8
7
6
5

680K

G Q1

R4

47K 5%

DGND

R11

R2

60K 5%

S

SI2301

D

C11

DGND

BAT

BAT

DGND

105 16V/X7R

tp2

1

CN1

1

BAT

2

USB_VBUS

/STATUS

USB_VBUS

/STATUS

3.3V

R3

47K 5%

1

D9

MBR0520

105 16V/X7R

1
2
3
4

DGND

C1

VIN
PPR
CHG
EN

ISL6294

U1

R80

100k

MMST3904

Q9

DGND

ISL6294

ISL6294

R79

47K

DGND

Figure 3.2.6.1 Charge control circuit diagram

2. Working principle: charge circuit is composed of charge control IC ISL6294 and peripheral circuit.

Pin VIN is ISL6294 power input pin, that is input end of USB 5V power; BAT is output pin of ISL6294, that

is input end of lithium-ion battery; /CHG is charge state indication end; when /CHG is low level, it means

machine is in charge, or else it means the charge finishes; IMIN is min charge current setup end, that is,

when charge current is lower than the current set by this end, charge is terminated. Setup of min charge

current is realized through selecting external resistor R2. The relation between min charge current /

MIN

and R2 is shown as follows:

(mA)

- 18 -

From the above, we know that min charge current is 20 mA.

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

Relation between charge current I and external resistor is shown as follows:

REF

Triode Q9 in circuit is used as charge current selection. When users use computer to charge battery,

PNX0102 outputs Sl6294, which is low level, Q9 cuts off and R11 is connected into circuit. From the

above, IREF is about 100 mA; when users use charger to charge battery, PNX0102 outputs ISL6294,

which is high level, Q9 is saturated on, R2 and R11 are connected parallel into circuit. From the above,

IREF is about 200m A. The reason for this design is that USB jack of some computers (for instance,

some PC) cannot provide large current to charge battery.

3.2.7 Battery protection circuit

1. Battery protection circuit board is installed on lithium battery and used to prevent lithium battery

from damage of short-circuit, over discharge and over charge. Lithium battery and battery protection

circuit board are together called lithium battery core components. Battery protection board circuit

diagram is shown in the figure 3.2.7.1:

VCC

C2
104

1

BAT+

1

BAT-

S8261AAJMD-G2J-T2 SOT23-6

1

DOUT

R2
2K

2

3

1

2
3

4

U1

V-

COUT

ECH8601 2206A

S1
G1

U2

S2
G2

D1
D1
D2
D2

VSS

VDD

Ct

8

7
6

5

6

5

R1

4

470

C1
104

C3
104

Figure 3.2.7.1 Battery protection circuit diagram

Equivalent circuit diagram of battery protection circuit is shown in the figure 3.2.7.2:

P+

Ct

Vss

R1

5

VDD

U1

Dout

1

V-

Cout

3

C3

2

R2

Lithium battery

C1

4

B

6

C2

U2

P-

Figure 3.2.7.2 Battery protection circuit equivalent diagram

- 19 -

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

and internal dual N groove MOSFET ECH8601. S8261 is the protection IC of the lithium-ion polymer

chargeable battery of internal high precision voltage detect circuit and delay circuit. DOUT and COUT

pin are over discharge (when lithium battery voltage is lower than 2.4V) protection output end and over

charge (when lithium battery voltage is higher than 4.2V) protection output end. The two pins are high

level when working normally; MOSFET is on and lithium battery voltage outputs to the player through

protection board; when in protection, the two pins output low level to control MOSFET to cut off power.

Over current detect (short-circuit protection) is fulfilled through the control of DOUT and COUT output by

V- pin when detecting short-circuit state; when battery is in short-circuit, voltage on V- external resistor

R1 will have a sudden change, V- detects that voltage on R2 increases immediately and then outputs to

control DOUT and COUT and outputs low level at the same time to control MOS tube to cut off battery to

protect battery.

3.2.8 Power circuit

1. 3.3V power circuit is shown in the figure 3.2.8.1:

P_VDD

106 6.3V/X5R

DGND

102 16V/X7R

C17

C56

DGND

1
2

R24

68K 5%

U3

VIN

VOUT
GND
EN3BYPASS

TPS79301

Figure 3.2.8.1 3.3V power circuit

FB

103 16V/X7R

EN

6
5
4

C52

DGND

R23

33K +/-1%

R25

20K +/-1%

DGND

tp3

1

C48

DGND

22pF 25V/C0G

3.3V

C59

106 6.3V/X5R

3.3V power is supplied by IC TPS79301 and peripheral circuit. TPS79301 is linear voltage

stabilizing module (also called LDO), EN pin is the enable pin that controls normal working and high

level is effective; BYPASS has resistor onside and constitutes low-pass filter with external 103 capacitor

C5 to decrease output noise; setup of TPS79301 output voltage is decided by two external resistors of

FB pin and he relation is shown as follows:

From the above, we know that VOUT is 3.2V.

- 20 -

2. 2.8V power circuit is shown in the figure 3.2.8.2:

C61

104 6.3V/X5R

3.3V

DGND

PQ1X281M2ZP

1

VI

2

GND
EN3BYPASS

U5

VOUT

5

4

104 6.3V/X5R

DGND

Figure 3.2.8.2 2.8V power circuit diagram

C5

tp9

FM2.8V

1

C62

106 6.3V/X5R

DGND

1.8V power is supplied by IC TPS62200 and peripheral circuit. TPS62200 is high efficiency reduce

DC-DC converter; EN pin is enable pin and high level is effective; the relation between TPS62200 output

voltage and FB pin feedback resistor is :

From the above, we know that output voltage is about 1.75V.

3. 1.8V power circuit is shown in the figure 3.2.8.3:

C63R26

47pF 25V

R28

100K +/-1%

tp4

1.8V

1

C60

106 6.3V/X5R

DGND

P_VDD

C18

475 6.3V/X5R

DGND

L6

CDRH2D11/HP-4R7

5

4

R27

1.2M1 %

EN

DGND

1
2
3

ERASE

VI
GND
EN

TPS62200

ERASE

U4

SW

FB

R12

47K 5%

MMST3904

Figure 3.2.8.3 1.8V power circuit diagram

240K

Q2

DGND

In order to enhance and better sound quality of Mp3, FM tuning and microphone effect, TPS62200

provides 2.8V power with low ripple interference. EN is enable end and high level working.

3.2.9 Reset circuit

1. Reset circuit is shown in the figure 3.2.9.1:

3.3V

3

VCC

RST

GND

G690

2

DGND

Figure 3.2.9.1 Reset circuit diagram

U8

1

- 21 -

RST