Teclast X21 Bedienungsanleitung
service manual
X21(RU)
Catalog
Chapter One About Maintenance
1.1 Safety precautions
1.1.1 Precautions for antistatic
1.1.2 About placement position
1.2 Maintenance method
1.2.1 Visualized method
1.2.2 Electric resistance method
1.2.3 Voltage method
1.2.4 Current method
1.2.5 Cutting method
1.2.6 Element substitution method
1.2.7 Comparison method
1.3 Required device for maintenance
Chapter Two Functions and Operation Instructions
2.1 USAGE INTRODUCTION
2.1.1 FUNCTIONS AND FEATURES
2.1.2 BUTTONS AND JACKS ILLUSTRATION
2.1.3 MAIN MENU ILLUSTRATION
2.1.4 PLAYING INTERFACE ILLUSTRATION
2.1.6 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
2.1.5 TUNING INTERFACE ILLUSTRATION
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2.2.8 A-B REPEAT FUNCTION
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
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
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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3.2.12 ON/OFF control circuit
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
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
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
Section One PCB board
Section Two circuit diagram
Chapter six BOM List
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Chapter One About Maintenance
1.1 Safety precautions
1.1.1 Precautions for antistatic
Movement and friction will both bring static electricity which causes serious damages to integrated
IC. Though static charge is little, when a limited quantity of electric charge is added to large-
scaleintegrated IC, as the capacitance is very small in the meantime, now the integrated IC is very much
easy to be struck through by static electricity or the performance will decrease. Thus static electricity
prevention is of extraordinary importance. The following are several measures to prevent static
electricity:
1. Use a piece of electric conduction metal with the length of about 2 metres to insert into the earth,
and Fetch the lead wire from the top of the surplus metal and connect to the required static electricity
device. The length and depth of the metal embedded under the earth should be determined according to
the wettability of the local soil. For humid places, it may be shorter, and longer and deeper for dry places.
If possible, it can be distributed and layed in terms of “#” shape.
2. On operating table-board, the antistatic table cushion should be covered and grounded.
3. All devices and equipments should be placed on the antistatic table cushion and grounded.
4. Maintenance personnel should wear antistatic wrist ring which should be grounded.
5. Places around the operating position should also be covered with electric conduction cushion or
Painted with antistatic paint.
1.1.2 About placement position
1. Audio power amplifier cannot be installed in places with high temperature and humidity.
2. Positions for placement should be stable and secure.
1.2 Maintenance method
1.2.1 Visualized method
Directly view whether abnormalities of collision, lack of element, joint welding, shedding welding,
rosin joint, copper foil turning up, lead wire disconnection and elements burning up among pins of
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- 2 -
Elements appear. Check power supply of the machine and then use hands to touch the casing of part of
elements and check whether they are hot to judge the trouble spot. You should pay more attention when
using this method to check in high voltage parts.
1.2.2 Electric resistance method
Set the multimeter in resistance position and test whether the numerical value of resistance of each
point in the circuit has difference from the normal value to judge the trouble spot. But in the circuit the
tested numerical value of resistance is not accurate, and the tested numerical value of integrated IC's
pins can only be used for reference, so the elements should be broken down for test.
1.2.3 Voltage method
Voltage method is relatively convenient, quick and accurate. Set the multimeter in voltage position
and test power supply voltage of the player and voltage of a certain point to judge the trouble spot
according to the tested voltage variation.
1.2.4 Current method
Set the multimeter in current position and test current of the player of a certain point to judge the
trouble spot. But when testing in current method, the multimeter should be series connected in the
circuit, which makes this method too trivial and troublesome, so it is less frequently used in reality.
1.2.5 Cutting method
Cutting method should be combined with electric resistance method and voltage method to use.
This method is mainly used in phenomena of short circuit and current leakage of the circuit. When
cutting the input terminal voltage of a certain level, if voltage of the player rises again, it means that the
trouble lies in this level.
1.2.6 Element substitution method
When some elements cannot be judged good or bad, substitution method may de adopted directly.
1.2.7 Comparison method
A same good PC board is usually used to test the correct voltage and waveform. Compared these
data with those tested through fault PC board, the cause of troubles may be found.
Through the above maintenance method, theoretical knowledge and maintenance experience, all
difficulties and troubles will be readily solved.
1.3 Required device for maintenance
Audio Generator
Digital oscillograph ( 100MHE)
SMD rework station
Multimeter
Soldering iron
Pointed-month pincers
Cutting nippers
Forceps
Electric screw driver
Terminals connecting cord
Headphone
Microphone
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Chapter Two
Functions and Operation Instructions
2.1 USAGE INTRODUCTION
2.1.1 FUNCTIONS AND FEATURES
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
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
# Philips PNX0101audio decode chip
LifeVibesTM
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1.2
1.3
1.1 # Press for long in any case
# Press in tuning mode
# Press in recording mode
# Press when operating in menu
enter main menu
switch in PRESET and SCAN mode
exit recording
not save the setup and return to the previous menu
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1.3
1.2 # 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
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HOLD button: Push towards arrow to lock buttons; and push toward the opposite direction to
unlock.
Headphone jack
USB jack
2.1.3 MAIN MENU ILLUSTRATION
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# My music
Memorize music file.
# My Voice
Memorize microphone recording file,
such as meeting, classroom and
interview recording, etc.
# Resume Play
Select "Resume Play" and the player
begins to play from the position that
music stopped playing last time.
# REC
Select "REC"to enter recording
mode
# FM Radio
Select " FM Radio"to enter radio mode.
# System Setup
Select " System Setup" to set system items.
# System Setup
Select " System Setup" to set system items.
2.1.4 PLAYING INTERFACE ILLUSTRATION
1Play State
Sound effect mode
Playback mode
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4Repeat state
Battery capacity
Song name and Singer
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7Time that has been played
Number of tracks
Spectrum display
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