akira LCT-15CHST Service Manual

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LCD TV

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Page 1 LCD TV Service Manual...
Page 2 -2 - MODEL: LCT-15CHST CHASSIS INFO: LS-07 Model No.: LCT15CHST.doc Version: 1.0...
Page 3: Table Of Contents
-3 - 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 PART LIST ..........................28 WIRING DIAGRAM........................29 CIRCUIT DIAGRAM .........................30 WALL-MOUNTING BRACKET INSTALLATION GUIDE ............37 Model No.: LCT15CHST.doc Version: 1.0...
Page 4: Safety Precaution
-4 - IMPORTANT SAFETY PRECAUTION Model No.: LCT15CHST.doc Version: 1.0...
Page 5 -5 - Model No.: LCT15CHST.doc Version: 1.0...
Page 6: Main Feature
-6 - 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);...
Page 7 -7 - 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 .
Page 8 -8 - 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.
Page 9: Electric Circuit
-9 - 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: Model No.: LCT15CHST.doc Version: 1.0...
Page 10: Main Ics Function
-10 - MAIN ICs FUNCTION INTRODUCTION GENERAL INTRODUCTION Name Model Main Function TAF5-E2I21RW2 RF tuner U8、U21 TDA1517AWT Audio amplifier MST518 AD converter and format change UOC(TDA15021H) Video decode and MCU control Si2311DS MOS switch IRF7316 MOS switch U11、U12 NTMS10P02 MOS switch LM2596-5.0 Liner voltage IC EEPROM(save display parameter...
Page 11 -11 - 1. MST518 High Integration Chip: MST518 is a high performance、high integration image processor which is designed for LCD, it can support SXGA format (1280*1024).it integrates a group of AD converter 、 high quality format transform system、 OSD generator、 output clock generator、multiple format output display interface (support TTL、...
Page 12 -12 - Analog red signal input channel 1 re-grounding RIN1M voltage RIN1 Analog red signal input channel 1 Analog green signal input channel 1 GIN1M re-grounding voltage GIN1 Analog green signal input channel 1 SOGIN1 Green sync signal input channel 1 Analog blue signal input channel 1 BIN1M re-grounding voltage...
Page 13 -13 - MST518 Internal Diagram: Model No.: LCT15CHST.doc Version: 1.0...
Page 14 -14 - 2. TDA15021H The third-generator super integrated circuit UOC III which designed by Philips company recently integrates with video decode、 2D comb filter、 high quality audio transacting technique, suitable with the European teletext technique and suitable with US closed caption and V-chip function compatible with single series IC.
Page 15 -15 - VDRA vertical sync output VIFIN1 VIF input 1 VIFIN2 VIF input 2 Outside connect vertical ramp capacity IREF Re-current input GNDIF IF grounding SIFIN1 SIF input 1 SIFIN2 SIF input 2 AGCOUT tuner RF AGC control voltage output EHTO Over voltage protection input SSIF...
Page 16 -16 - R/PrIN3 R/Pr signal input G/YIN3 G/Y signal input B/PbIN3 B / Pb signal input GND3 Grounding BCLIN Beam current limiter input BLKIN Black current input R basic color signal input G basic color signal output B basic color signal output VDD3 +3.3V VREFAD_NEG...
Page 17 -17 - TDA15021H Internal Block Diagram: Model No.: LCT15CHST.doc Version: 1.0...
Page 18 -18 - 3 TDA9178 : TDA9178 is an analog signal processor with standard YUV input and output interface .It provide three main process functions: luminance vector, color vector and spectrum process. It can finish comprehensive picture improving function independently. The characteristics of the TDA9178 are below: Luminance Transient Improvement (LTI), Colour Transient Improvement (CTI) Variable gamma control...
Page 19 -19 - DA9178 Internal Block Diagram: Model No.: LCT15CHST.doc Version: 1.0...
Page 20 -20 - 4 TDA1517AWT : The TDA1517ATW is a double channel class-AB power amplifier contained in a plastic heat sink thin shrink small outline package (HTSSOP20). The device is primarily developed for multimedia applications. Outside circuit is simple Mute、standby is controllable Temperature protect circuit low noise switch Constant gain...
Page 21 -21 - SINGNAL PROCESSING FLOWCHART I. Analog Signals Process 1 IF/RF process Completed by TAF5-E2I21RW2 RF tuner, output IF signal. The Function of RF tuner as below: Symbol Function Auto gain control voltage The TV do not connect Ground C bus（clock ） C bus（data ）...
Page 22 -22 - 5 TV Power Supply System (1) The supply power system of the main IC as below: 12V:the unit main power supply +34V:RF tuner tune voltage VCC5: stable and constant +5V power supply VCC5A: +5V power supply software can turn off V3_3D:UOC digital part supply power supply V1_8V1:UOC digital part constant supply power supply V1_8V2:UOC digital part power supply can be turned off...
Page 23 -23 - KEY PART AND FUNCTION Name Element Function Description RF tuner TAF5-E2I21RW2 RF input, IF output UOC(TDA15021H) Video decode and MCU control MST518 AD converter and format transition PI5V330A Video switch on/off PI5V330A Video switch on/off IRF7316 MOS switch LM2596-5.0 Linear voltage IC LM2596-5.0...
Page 24: Symptoms & Correction
-24 - SYMPTOMS AND CORRECTION Symptom Reason and resolve The display board of If some display board of DVI can not receive the data PC no image in DVI. when turning on the TV, there is no output; if pull out the DVI line abruptly, there is also no DVI output;...
Page 25: List Of Breakable & Maintenance Parts
-25 - LISTS OF BREAKABLE AND MAINTENANCE PARTS This list is provided for reference, if change the parameters of those maintain parts of an apparatus, we do not notice in the future. The newest data regard as the correct type or specification.
Page 26: Factory Mode
-26 - FACTORY MODE The Parameter adjustment of factory mode introduction: The method of Entering into factory mode: turn down the volume to 0, press down the key of “mute” in remote control, then press the key of “menu” in remote control.
Page 27: Exploded View
-27 - EXPLODED VIEW Wiring connecting illustration Assemble with heat shrink tube after hook soldering Brown Co Yellow / Green Blue Color Model No.: LCT15CHST.doc Version: 1.0...
Page 28: Part List
-28 - PART LIST S/no. Description 1 ~ 2 Main Module Front Frame Module Back Cover Module Pedestal Module Screw ( 3 x 10BTHch) Screw ( 3 x 8BTHch) Screw 3 x 6 Screw M3 x 8 M4 x 6 Wire Clip Model No.: LCT15CHST.doc Version: 1.0...
Page 29: Wiring Diagram
-29 - WIRING DIAGRAM Front Panel Control Board Black White Black White Speaker Speaker Main Board Module Power Filte Headphone Plug Module IR Receiver Power Switch Model No.: LCT15CHST.doc Version: 1.0...
Page 30: Circuit Diagram
-30 - CIRCUIT DIAGRAM Model No.: LCT15CHST.doc Version: 1.0...
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Page 37: Wall-Mounting Bracket Installation Guide
-37 - WALL-MOUNTING BRACKET INSTALLATION GUIDE READ CAREFULLY BEFORE INSTALLATION! THE INSTALLATION GUIDE SHOULD BE RETAINED FOR FUTURE REFERENCE. Caution: 1. DO NOT attempt to install the TV by yourself to avoid mistakes or hazard. Refer all installation to qualified servicing personnel. 2.

akira LCT-15CHST Service Manual

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