akira LCT-17CHST Manuel utilisateur
LCD TV
Service Manual
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Model No.: LCT17CHST.doc
Version: 1.0
MODEL:
LCT-17CHST
CHASSIS
INFO: LS-07
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Model No.: LCT17CHST.doc
Version: 1.0
CONTENTS
SAFETY PRECAUTION .............................................................................................................4
MAIN FEATURE .........................................................................................................................6
ELECTRIC CIRCUIT ..................................................................................................................9
MAIN ICs FUNCTION...............................................................................................................10
SYMPTOMS & CORRECTION ................................................................................................24
LIST OF BREAKABLE & MAINTENANCE PARTS ..................................................................25
FACTORY MODE .....................................................................................................................26
EXPLODED VIEW....................................................................................................................27
WIRING DIAGRAM...................................................................................................................28
CIRCUIT DIAGRAM .................................................................................................................29
WALL-MOUNTING BRACKET INSTALLATION GUIDE ..........................................................36
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IMPORTANT SAFETY PRECAUTION
Model No.: LCT17CHST.doc
Version: 1.0
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Model No.: LCT17CHST.doc
Version: 1.0
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Model No.: LCT17CHST.doc
Version: 1.0
MAIN FEATURE
RF input ,CATV function
Capable to receive the full append cable programs in 470MHZ, can
store 100 programs (Program number display 0～99);
AV Audio and AV Video input
In SCART mode, the system can automatically activate SCART
checking function to identify signal input modes(CVBS or RGB) and
input signal character(16:9 or 4:3); Capable to receive PAL, NTSC,
SECAM color systems; Very convenient to watch VCR (video
cassette recorder), Pickup Camera and other Disc’s programs.
YPbPr input
Can receive high definition YPbPr component video signal from
such as DVD Conveniently . Support format:480I、480P、576I、576P、
720P（50/60HZ）、1080I（50/60HZ）、1080P（50/60HZ）；
VGA input
As the Terminal display Equipments of computer, it can connect with
computer conveniently. it can connect with Computer audio card by
its own Audio connection line ,so you can listen the audio
information from computer.
Program lock and child lock function
The function of program lock can lock the programs、input password
and Modification, the function of child lock can lock the keys.
Timer function
You can set turn on and turn off on time, and power off in 15 min
automatically if no signal input. Automatically enter into save energy
mode by itself if no signal in PC condition, it can be awaken if signal
inputs.
Blue screen mute noise
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Model No.: LCT17CHST.doc
Version: 1.0
In condition of TV、AV、RGB and YPbPr, gentle blue screen will be
displayed if no signal input.
Chinese/English menu
Adopt the design of Convenient and Simple graphic menu, you can
operate menu more conveniently and more intuition.
Save energy function(power management mode)
When TV is used as PC display terminal, and PC has no output
signal . The TV will be power off in about 30 Seconds automatically,
and enter into standby condition. press down Power/P+/P-/ Number
key of Remote control or the PC signal appearance again, the TV
will be on automatically.
Plug-and-play
The TV works as the terminal Equipments of computer, need not
equip install software，it is real Plug-and-Play.
Automatic correct
By its automatic correct function ,the LCD TV can bring you the best
view.
No Flicker、no Radiation 、Green environmental protection
Because of it’s Advanced power Management mode, the TV can
realize standby and recall on function.
ACI function ( Auto channel Installation ).
Stereo and digital accompanying sound processing.
Auto identify and demodulate IGR, and decode NICAM digital
accompanying sound.
Zoom image function
Support follow zoom function: Full screen mode、4:3 mode（16:9
TFT）,16:9（4：3 TFT）、Movie mode、Sub-title movie mode.
Light weight、small dimension、Low power consumption
Advanced picture quality Strengthen function
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Model No.: LCT17CHST.doc
Version: 1.0
Dynamic skin color Correct: Improve distort color in picture, make it
Near to real color.
Black level Extension: blacken the more black area of picture, Raise
the contrast in Dark Background.
Color Edge correct: Increase the Steep of color signal edge ,make
the edge of color Transition more clearly .
Brightness edge correct: increase the steep of Brightness signal
edge, make the edge of picture is more clearly.
Super fine and inner fairness TFT
10-page teletext storage
Dynamic comb filter
Headphones output
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Model No.: LCT17CHST.doc
Version: 1.0
ELECTRIC CIRCUIT
The LS07 chassis LCD TV is composed of steady voltage circuit、inverter Circuit 、RF circuit、video Strengthen circuit、video
Processing circuit、Power Enlarge circuit、VGA circuit、system control circuit and key control circuit. The block diagram of circuit
Constitute as below:
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Model No.: LCT17CHST.doc
Version: 1.0
MAIN ICs FUNCTION INTRODUCTION
GENERAL INTRODUCTION
No. Name Model Main Function
1 A1 TAF5-E2I21RW2 RF tuner
2 U8、U21 TDA1517AWT Audio amplifier
3 U3 MST518 AD converter and format change
4 U2 UOC(TDA15021H) Video decode and MCU control
5 Q9 Si2311DS MOS switch
6 U11、U12 IRF7316 MOS switch
7 U19 NTMS10P02 MOS switch
8 U23 LM2596-5.0 Liner voltage IC
9 U1 24LC21A EEPROM(save display parameter
information)
10 U4 24LC32A
EEPROM（save user control information）
11 U6、U20 PI5V330A Video switch
Table des matières
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