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akira LCT-20CVST Service Manual

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Summary of Contents for akira LCT-20CVST

  • Page 1: Service Manual

    LCT TV Service Manual...
  • Page 2 -2 - MODEL: LCT-20CVST Model No.: LCT-20CVST Version: 1.0...

  • Page 3: Table Of Contents

    -3 - CONTENTS SPECIFICATION............................. 4 ADJUSTMENT SPECIFICATION......................8 PCB ASSEMBLY FUNCTIONAL DESCRIPTION ................11 BLOCK DIAGRAM ..........................16 IMPORTANT IC LIST........................... 17 TROUBLE SHOOTING ........................18 EXPLODED VIEW..........................22 PART LIST............................. 30 CIRCUIT DIAGRAM ..........................32 Model No.: LCT-20CVST Version: 1.0...

  • Page 4: Specification

    Video Input 1(Composite RCA 3Pin, Included Audio 2Pin) Video Input 2(Composite RCA 3Pin, Included Audio 2Pin) DVD Input (Y Cb Cr, RCA 3Pin) S-Video Input EURO Scart Jack Headphone Output (Phone Jack, Stereo) A/V Output (Scart Jack) Model No.: LCT-20CVST Version: 1.0...

  • Page 5: User Interface

    Sound Speaker RMS 5W*2 LIPS Input Voltage AC 90~265 Vac Input Frequency 47~63Hz Output 1 Voltage DC 14.5~15.5V POWER Out Current Min 30mA~Max 2A Output 2 Voltage DC 10.8~15V Out Current Min 0A~Max2A Power Consumption Model No.: LCT-20CVST Version: 1.0...
  • Page 6 GEOMETRY ( PC input mode only ) H-POSITION V-POSITION AUTO POSITION FUNCTION TRACKING ( PC input mode only ) AUTO TRACKING CLOCK PHASE INFORMATION TUNING ( TV input mode only ) SORT AUTO TUNING MANUAL TUNING FINE TUNING CH SKIP LANGUAGE Model No.: LCT-20CVST Version: 1.0...
  • Page 7 ** In mass production, adjust only Factory ADJ item, do not adjust other Modes. ( In the time of variation of A/S & initial condition of screen quality , built in other Modes for controlling ) Model No.: LCT-20CVST Version: 1.0...

  • Page 8: Adjustment Specification

    2) Select CLOCK DELAY (including in FACTORY ADJ MENU) with CH UP/DOWN KEY in Factory mode 3) Changing the level of CLOCK DELAY with VOL UP/DOWN KEY, adjust to the noiseless level in screen (variable range : 0 ~ 15, DEFAULT : 15) Model No.: LCT-20CVST Version: 1.0...
  • Page 9 4. OPTION : - X3 - INVERT Using 8 BIT PANEL Back-Light Control of Inverter voltage polarity (Bright Max : HIGH, Min : LOW) *** Select no 4 in the case that no 4 is not selected. Model No.: LCT-20CVST Version: 1.0...
  • Page 10 Press SEL & Power Key in Front Panel at the same time, and go to Factory mode. Select VPC3230 in Factory mode. Adjust to the following levels with VOLUME UP/DOWN, CH UP/DOWN CONTRAST b. BRIGHT PEAKING d. CIP CONTRAST CIP BRIGHT *** No need to adjust when the SET is stable. Model No.: LCT-20CVST Version: 1.0...

  • Page 11: Pcb Assembly Functional Description

    CN002 RS232 Control connector (option) Molex 53015-04 CN25M Speaker Connector Molex 53015-04 CN72M Interface connector PH03-40DS-G CN21M (tuner connector) Pin No Symbol Description 12C serial data 12C serial clock CVBS CVBS out Sound IF out Model No.: LCT-20CVST Version: 1.0...
  • Page 12 Description Speaker out right Speaker out left CN72M (interface connector) Pin No. Symbol Description VLCD +12Vcc VLCD +12Vcc Red Data (LSB) Red Data Red Data Red Data Red Data Red Data Ground Ground Red Data Model No.: LCT-20CVST Version: 1.0...
  • Page 13 Blue Data (LSB) Blue Data Ground Ground Blue Data Blue Data Blue Data Blue Data Blue Data Blue Data (MSB) Ground Ground LVSYNC Vertical sync LCKA Dot Clock Ground Ground LHSYNC Horizontal Sync LDTC Data Enable Model No.: LCT-20CVST Version: 1.0...

  • Page 14: Tuner Board

    Control PCB connector and switch identification. Reference Description Connector type POWER IT-1102AH-T SELECT IT-1102AH-T VOL+ IT-1102AH-T VOL- IT-1102AH-T IT-1102AH-T IT-1102AH-T Menu IT-1102AH-T SAM3270 RM03 Remocon reciver Rom-N338TM2 CNC01 OSD Connector MOLEX 53015-0810 Tuner board Tuner control board assembly Model No.: LCT-20CVST Version: 1.0...
  • Page 15 SECAM L /L’ Channel 48.25MHz ~ 168.25MHz 175.25MHz ~ 463.25MHz 471.25MHz ~ 855.25MHz TUNER PCB connector and switch identification Pin No Symbol Description I2C serial Data I2C serial clock CVBS CVBS out Sound if out Model No.: LCT-20CVST Version: 1.0...

  • Page 16: Block Diagram

    -16 - BLOCK DIAGRAM Model No.: LCT-20CVST Version: 1.0...

  • Page 17: Important Ic List

    ICX1 /0104 DIP IC Audio TDA1519B SOT110 IC251 IC RGB S/W TEA5114A DIP ICS1 IC EEPROM 24C16 ROM DIP IC002 IC Logic N74F14D SOIC IC362 IC EEPROM 24C02 DIP ICX2 IC Reset KIA7042AF SOT-89 IC003 Model No.: LCT-20CVST Version: 1.0...

  • Page 18: Trouble Shooting

    PC or video board is an available mode for your monitor. On your computer check control panel, display, setting. Horizontal frequency 31khz Vertical frequency 56~85hz Maximum refresh rate 640*480 @ 60hz Model No.: LCT-20CVST Version: 1.0...
  • Page 19 Ensure that the antenna cable is Channel memory. firmly connected to the VHF /UHF jack. Check “channel memory” and make sure you choose the correct channel system. Select “Auto tuning” to configure the channel system automatically. Model No.: LCT-20CVST Version: 1.0...
  • Page 20 Check IC803 #4 Check IC801 #5, DC12V level 6, 7, 8 DC24V Replacement IC803 Check IC804 #4 Check & replacement DC5V level IC804 Check IC806 #4 Check & DC3.3V level replacement IC806 Check & replacement panel Model No.: LCT-20CVST Version: 1.0...
  • Page 21 Replacement Check CN01M check & OSD OSD PCB or pin spec check cable check cable IC800 #4 DC5V level check Check IC001 #2, 3, Replacement U-com IC001 7, 35 pulse check Check & replacement OSD Model No.: LCT-20CVST Version: 1.0...

  • Page 22: Exploded View

    -22 - EXPLODED VIEW Model No.: LCT-20CVST Version: 1.0...
  • Page 23 -23 - Model No.: LCT-20CVST Version: 1.0...
  • Page 24 -24 - Model No.: LCT-20CVST Version: 1.0...
  • Page 25 -25 - Model No.: LCT-20CVST Version: 1.0...
  • Page 26 -26 - Model No.: LCT-20CVST Version: 1.0...
  • Page 27 -27 - Model No.: LCT-20CVST Version: 1.0...
  • Page 28 -28 - Model No.: LCT-20CVST Version: 1.0...
  • Page 29 -29 - Model No.: LCT-20CVST Version: 1.0...

  • Page 30: Part List

    Signal-cable BMS 4x6 EMI-cover Tuner-PCB Tuner cable Lips cable BMS M3x6 BTS (TT) 3x6 Rear cover PTS (TT) 4x10 Tuner cover WPTS (TT) 4x8 Base cover Metal base BTS (TT) 3x8 Hinge body Base cover-F Model No.: LCT-20CVST Version: 1.0...
  • Page 31 -31 - Part name BHM M3x6 BHM M4x10-SEMS Base cover-R BHM M3x6 Stand ass’y PMS M4x12-SEMS Hinge cover Model No.: LCT-20CVST Version: 1.0...

  • Page 32: Circuit Diagram

    -32 - CIRCUIT DIAGRAM BLOCK DIAGRAM (PAL) Model No.: LCT-20CVST Version: 1.0...
  • Page 33 -33 - BLOCK DIAGRAM (NTSC) Model No.: LCT-20CVST Version: 1.0...
  • Page 34 -34 - POWER Model No.: LCT-20CVST Version: 1.0...
  • Page 35 -35 - U-COM Model No.: LCT-20CVST Version: 1.0...
  • Page 36 -36 - AD9883 Model No.: LCT-20CVST Version: 1.0...
  • Page 37 -37 - VPC3230 Model No.: LCT-20CVST Version: 1.0...
  • Page 38 -38 - SCALER Model No.: LCT-20CVST Version: 1.0...
  • Page 39 -39 - MEMORY Model No.: LCT-20CVST Version: 1.0...
  • Page 40 -40 - SOUND IC Model No.: LCT-20CVST Version: 1.0...
  • Page 41 -41 - SOUND AMP Model No.: LCT-20CVST Version: 1.0...
  • Page 42 -42 - TTX /CAPTION Model No.: LCT-20CVST Version: 1.0...
  • Page 43 -43 - LVDS Model No.: LCT-20CVST Version: 1.0...
  • Page 44 -44 - KEY CONTROL Model No.: LCT-20CVST Version: 1.0...
  • Page 45 -45 - TUNER Model No.: LCT-20CVST Version: 1.0...

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