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akira LCT-32CHSTP Service Manual

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Summary of Contents for akira LCT-32CHSTP

  • Page 1 LCT TV Service Manual...
  • Page 2 -2 - Model No.: LCT-32CHSTP Version: 1.0...

  • Page 3: Table Of Contents

    MAIN ICS FUNCTION INTRODUCTION .................... 8 SYMPTOMS AND CORRECTION ...................... 46 LIST OF BREAKABLE AND MAINTENANCE PARTS ..............47 FACTORY MODE AND NOTICE ......................49 CIRCUIT DIAGRAM ..........................53 WIRING DIAGRAM ..........................66 EXPLODED VIEW..........................67 PART LIST ............................. 68 Model No.: LCT-32CHSTP Version: 1.0...

  • Page 4: Main Feature

    Automatically on/off in certain preset time, and transmit automatically to the fixed channel Blue background noise reduction In TV, AV (S-Video), YCbCr, and YPbPr modes, screen displays soft blue background if there is no signal input Model No.: LCT-32CHSTP Version: 1.0...
  • Page 5 Power Energy Saving Mode and work again when it received a valid VGA signal or press any button on the panel/remote control. Plug and Play It is no need to equip any installation software when the product is used as computer terminal display equipment Legerity, convenience, low power consumption Model No.: LCT-32CHSTP Version: 1.0...
  • Page 6 Unit IC Compositions： LS08 chassis LCD TV is mainly composed of regulator IC, RF IC, video processor IC, Power Amplify IC, Analog Video IC, System Control IC and Key Control IC, see this IC frame as below: Model No.: LCT-32CHSTP Version: 1.0...
  • Page 7 Screens for LS08 have built-in adverse transformer, which change DC to high voltage AC signal lightening the back light; The LCD screen is used to display the image after the image signal has been processed by the main board. Model No.: LCT-32CHSTP Version: 1.0...

  • Page 8: Main Ics Function Introduction

    U700 GM1501-BD Video processor U201 TDA15021H/N1B07 AV decoder U402 SAA7115HL/V1 Sub channel video decoder U305 SM5302AS-G-ET High definition signal filter U400 TDA8759HV/8/C1 Video signal modulus transformer TDA9178T/N1 Video signal picture amendment U600 MT46V2M32LG-4 Frame buffer Model No.: LCT-32CHSTP Version: 1.0...
  • Page 9 IIC bus (Clock) IIC bus (Data) Power supply To produce 0~30V tune voltage to 0~30V Intermediate frequency output (NC) Intermediate frequency output (NC) Band control Band control Auto gain control VEDIO CVBS signal output Power supply AUDIO Model No.: LCT-32CHSTP Version: 1.0...
  • Page 10 Embedded IC for adjustments of gain, contrast, brightness, color saturation, hue and flesh tone. Efficiency in reducing EMI electromagnetism inference power consumption Inclined grain processing with small angle High quality video processing Programmable output format Embedded LVDS transport Advanced OSD Embedded micro controller Model No.: LCT-32CHSTP Version: 1.0...
  • Page 11 ADC3.3Vpower supply A12, B12, C12 LBADC_IN1～ ADC analog input channel LBADC_IN3 LBADC_RETURN Channel analog ground LBADC-GND Power supply voltage analog ground OCM bus port AA1~AA3, Y1~Y3, Address input output port OCMADDR0～ W1~W3, V1~V4, OCMADDR19 U1~U4, T1~T3 Model No.: LCT-32CHSTP Version: 1.0...
  • Page 12 Red signal or V/Cr/Pr signal input A19, B18, B19, D18 B23, B24, B25, A24 VBLU7~ VBLU0 Blue signal or U/Cb/Pb signal input A25, C23, C24, D24 Screen Control Port PPWR Screen power control PBIAS Screen bias control Model No.: LCT-32CHSTP Version: 1.0...
  • Page 13 Crystal oscillator interface VDDD33_PLL， Digital power supply VDDD33_SDDS VDDD33_DDDS VSSD33_PLL Digital ground VSSD33_SDDS VSSD33_DDDS VDDA33_RPLL Analog power supply VDDA33_FPLL VDDA33_SDDS VDDA33_DDDS VSSA33_RPLL Analog ground VSSA33_FPLL VSSA33_DDDS VSSA33_DDDS TCLK Reference clock signal input ACS_RSET_HD External resistance port Model No.: LCT-32CHSTP Version: 1.0...
  • Page 14 L23, M23, P23, R23, T23, V23, W23, Y23, AA23, AB23, AC23 VDDA18_DLL 1.8V power supply VSSA18_DLL Power supply ground Digital power supply K10, K11, K16, K17, CORE_1.8 1.8V power supply L11, L16, T11, T16, T17, U10, U11, U16, Model No.: LCT-32CHSTP Version: 1.0...
  • Page 15 IO_3.3 3.3V power supply AB4, AC4, AC6, D17, D22, AC8, AC10 K12, K13, K14, K15, D_GND Power ground L10, L12, L13, L14, L15, L17, M10, M11, M12, M13 A1, AC, D5, AC17, NO_CONNECT K3, F1 Model No.: LCT-32CHSTP Version: 1.0...
  • Page 16 -16 - GM1501Internal Block Diagram： Model No.: LCT-32CHSTP Version: 1.0...
  • Page 17 Output format RGB 4:4:4, YUV 4:4:4, YUV 4:2:2, CCIR 656 or YUV 4:2:2 semi-planar standard on output bus I²C bus control Programmable clock phase adjustment cells Amplifier bandwidth of 100 MHz Integrated PLL divider Power-Down mode Model No.: LCT-32CHSTP Version: 1.0...
  • Page 18 -18 - TDA8759 Block Diagram Model No.: LCT-32CHSTP Version: 1.0...
  • Page 19 80,79,78 R/Pr1~ R/Pr3 Red/red-chrominance channel analog input 89~92,97~101 TST0~TST17 Reserved for test 112,121,122, 124,125,160~163 Power-down control input Output enable input I²C bus address control input COAST PLL control input GAIN Gain input CLAMP Clamp input Model No.: LCT-32CHSTP Version: 1.0...
  • Page 20 9W /Ch into an 8Ω load from 12Vsupply; Efficient, class D operation eliminates heat sinks and reduces power supply requirements; 32-step DC volume control from -40db~36db; Line outputs for external headphone; Thermal and short-circuit protection Model No.: LCT-32CHSTP Version: 1.0...
  • Page 21 PVCCR 38,39 – Power supply for right channel H-bridge (tied to pins 46 and 47 internally), not connected to PVCCL or AVCC. PVCCR 46, 47 – Power supply for right channel H-bridge (tied to pins 38 and 39 internally), not connected to PVCCL or AVCC. Model No.: LCT-32CHSTP Version: 1.0...
  • Page 22 DC voltage that sets the gain of the Class-D and VAROUT outputs. VREF Analog reference for gain control section. V2P5 2.5-V Reference for analog cells, as well as reference for unused audio input when using single-ended inputs. Model No.: LCT-32CHSTP Version: 1.0...
  • Page 23 -23 - TPA3002D2 External Block Diagram： Model No.: LCT-32CHSTP Version: 1.0...
  • Page 24 Output buffer gain switching function: 0, 6dB (input-to-output AC signal gain) Channel-to-channel gain difference: 0.5dB(±5% supply voltage variation) Channel-to-channel phase difference: 3.5 degree Output signal harmonic distortion (all channels): 1.5% Cutoff frequency: 5.8 to 37MHz variable SM5301AS Internal Block Diagram： Model No.: LCT-32CHSTP Version: 1.0...
  • Page 25 Analog RINA or YINA signal input. Sync signal is input on SYNCIN pin. RINB/YINB Analog RINB or YINB signal input. Sync signal is input on SYNCIN pin. 4, 8, 28 No connection (leave open or connect to ground) Model No.: LCT-32CHSTP Version: 1.0...
  • Page 26 Two improved 9 Bit CMOS analog-to-digital converter in differential CMOS style; Automatic Clamp Control (ACC) for CVBS, Y and C; Enhanced Horizontal and vertical Sync Detection;  P AL delay line for correcting PAL phase errors; Automatic TV/VCR detection; TV/VCR Model No.: LCT-32CHSTP Version: 1.0...
  • Page 27 -27 - SAA7115 Internal Diagram: Model No.: LCT-32CHSTP Version: 1.0...
  • Page 28 Real time status or sync information, controlled by subaddr. “11h and 12h” RTS1 35 O real time status or sync information, RTS1 controlled by subaddr. “11h and 12h” RTCO Real time control output AMCLK Audio master clock output ASCLK Audio serial clock output Model No.: LCT-32CHSTP Version: 1.0...
  • Page 29 In ten bit video output mode: this signal represents the video bit XCLK clock I/O expansion port data qualifier I/O expansion port XRDY task flag or read signal from scaler, controlled by XRQT (subaddr. 83H) Model No.: LCT-32CHSTP Version: 1.0...
  • Page 30 With an external FM tuner also signals with an IF frequency of 10.7 MHz can be demodulated. For the QIP90 versions this is valid only for the “stereo” versions Built-in adaptable brightness delay circuit Switch able brightness signal transmission rate Model No.: LCT-32CHSTP Version: 1.0...
  • Page 31 AGC output EHTO EHT / overvoltage protection input AVL/SWO/SSIF/REFO/ Automatic Volume Levelling / switch output REFIN reference output / external reference signal DVB operation AUDIOIN5L audio-5 input (left signal) audio-5 input (right signal) AUDIOIN5R Model No.: LCT-32CHSTP Version: 1.0...
  • Page 32 CVBS2/Y2 CVBS/Y input CVBSO/PIP CVBS/PIP signal output scan velocity modulation output FBISO/CSY flyback input/sandcastle output or composite H/V HOUT horizontal output VIN (R/PRIN2/CX) V-input for YUV interface UIN (B/PBIN2) U-input for YUV interface Model No.: LCT-32CHSTP Version: 1.0...
  • Page 33 Beam current limiter input Red output Green output Blue output INT0/P0.5 External interrupt 0 or port 0.5 (4 mA current sinking direct drive of LEDs) 98,99,102~109 P0.0~ P0.4 Data port 111~116,119,120 P1.0~P1.7,P2.0~P2.5, 122,123,126~ 128 P3.0~P3.3 Model No.: LCT-32CHSTP Version: 1.0...
  • Page 34 -34 - UOC Block Diagram: CHAPTER THREE SIGNAL FLOW ANALYSIS AND KEY POINT MEASURE DATA Model No.: LCT-32CHSTP Version: 1.0...
  • Page 35 5V is divided into two ways, one way is provided for other IC and apparatus, the 5V will be turned down under standby mode, but can not be cut off. The other 5V is provided for MCU, infrared receiver, EEPROM and so on, it would not be cut off under standby mode. Model No.: LCT-32CHSTP Version: 1.0...
  • Page 36 U402 SAA7115 1, 25, 51, 75, 33, 43, 58, 68, 93, 8, 83 U504 U502 LM1117-1.8 LM2596-5.0 U700 GM1601 U505 LM1117-2.5 MCU5 JP1 the U305 the 2 U506 CN70 the 4 LM1117-3.3 CN70 the 3 Model No.: LCT-32CHSTP Version: 1.0...
  • Page 37 59 PIN Manostat Pin Voltage in Main Board Schedule Name Type PIN1(V) PIN2(V) PIN3(V) PIN4(V) PIN5(V) LM1117-1.8V LM1117-3.3V LM2596-5.0 U405 LM1117-3.3 78M08 U403 LM1117-1.8V U503 LM1806-3.3 U505 LM1117-2.5 U506 LM1117-3.3 U501 LM2596-5.0 U502 LM2596-5.0 U504 LM1117-1.8V Model No.: LCT-32CHSTP Version: 1.0...
  • Page 38 -38 - Main Components and Socket Locations and Definitions: Model No.: LCT-32CHSTP Version: 1.0...
  • Page 39 Prepare to use JP701 Display CN306 Prepare to use AVP303 DVI audio input CN300 DVI port AVP300 VG audio input CN301 VGA port JPY400 HDTV AV input JPY401 JPY402 JPA400 SCART (1) interface JPA401 SCART (2) interface Model No.: LCT-32CHSTP Version: 1.0...
  • Page 40 Video signal image improve K202 K9656M Sound surface filter K201 K3953M Sound surface filter FSAV330QSCX Select switch U701 24LC32A T/SN Buffer U307 FSAV330QSCX Select switch U306 FSAV330QSCX Select switch U302 24LC21A T/SN EEPROM U303 24LC21A T/SN EEPROM Model No.: LCT-32CHSTP Version: 1.0...
  • Page 41 UT1,The undulance of the 10 of SAA7115 also like this: RF input color stripe signal, the Pin85, Pin86, Pin87 of U201 output R,G,B signal undulance, the E pole undulance of Q171,Q172,Q173: Model No.: LCT-32CHSTP Version: 1.0...
  • Page 42 U201, the 11 pin of U5, the 4 pin of parent/sub RF tuner: RF input color stripe signal, UOC vertical sync signal, the undulance of the 22th pin of U201, the pin of U400: Model No.: LCT-32CHSTP Version: 1.0...
  • Page 43 -43 - RF input color stripe signal ， UOC vertical sync signal , the undulance of the 22th pin of U201,the pin of U400: Model No.: LCT-32CHSTP Version: 1.0...
  • Page 44 RF input gray ladder signal, the TV signal undulance in the 19 pin of SAA7115: The 1KHz sound signal input, the undulance of the 60 , 61th pin of U201, the undulance of the 2th, pin of U6 also like this: Model No.: LCT-32CHSTP Version: 1.0...
  • Page 45 , 41th, 44 , 45 pin of U6 and pins: Location Type PIN1(V) PIN2(V) PIN3(V) PIN4(V) PIN5(V) LM1117-1.8V LM1117-3.3V LM2596-5.0 U405 LM1117-3.3 78M08 U403 LM1117-1.8V U503 LM1806-3.3 U505 LM1117-2.5 U506 LM1117-3.3 U501 LM2596-5.0 U502 LM2596-5.0 U504 LM1117-1.8V Model No.: LCT-32CHSTP Version: 1.0...

  • Page 46: Symptoms And Correction

    The LCD TV can not work abruptly, power off and turning it on controlled (inc red lamp is again. no but the TV is off, remote control and key press in TV can not control the TV, etc.) Model No.: LCT-32CHSTP Version: 1.0...

  • Page 47: List Of Breakable And Maintenance Parts

    8669400190J JUJ6.694.019 PCB JUJ7.820.091 Inside power supply module 67128017905 FSP179-4F01 LCD display screen 68219602735 V270W1-L04 Electron tuner 8289100063E TMI4-C22P2RW Electron tuner 8289100454E TAD5-C2IP1RW Electric speaker 56224605080 Y2929-01-5W-8Ω Electric speaker 562D6608082 Y50138-01-8W-8Ω Remote controller 8201803760L KLC5A Model No.: LCT-32CHSTP Version: 1.0...
  • Page 48 68213700105 LC370W01 LCD display screen 8864000150J JUJ8.640.015 Electron tuner 8289100063E TMI4-C22P2RW Electron tuner 8289100454E TAD5-C2IP1RW Electric speaker 56232971081 Y3297-L-10W-8 Ω Electric speaker 56232971082 Y3297-R-10W-8 Ω Remote controller 56239390580 Y3939-01-5W-8 Ω Remote emitter 8201803510L KLC5B Model No.: LCT-32CHSTP Version: 1.0...

  • Page 49: Factory Mode And Notice

    The M denotes entering into factory mode now, the figures of index denotes the index number now, the HWUC_BRI denotes the name of adjusting item now, the 0X1F denotes the numerical value. Each adjusting item have only one index number, the operator press the numeric key or press P+/P- directly. Model No.: LCT-32CHSTP Version: 1.0...
  • Page 50 2. When tuning the 16 item, the storage data will be cleaned off. Therefore, if not necessary, please do not adjust it, the items of index number 1, 2, 3, 4, 5, 6 are not necessary to adjust. Model No.: LCT-32CHSTP Version: 1.0...
  • Page 51 Set the picture of LCD TV for standard condition Set the distance of light receiver of white balance from center place of LCD display screen for 15cm ± 3cm. Make sure that the environmental brightness is below 2cd/m2. Model No.: LCT-32CHSTP Version: 1.0...
  • Page 52 Δ uv 0, if not, it means abnormal color, then you should adjust values of R, G, B to 0, meanwhile, meet the color coordinates requirements. Model No.: LCT-32CHSTP Version: 1.0...

  • Page 53: Circuit Diagram

    Tuner_IF NEW3-ls08-POWER SC2_RIN Tuner_IF Tuner_IF R_YPBPR NEW3-ls08-POWER.SCH Tuner_IF R_YPBPR MM_SCL Y_YPBPR Power_off MM_SCL Y_YPBPR Power_off MM_SDA B_YPBPR Backlight_on_off MM_SDA B_YPBPR Backlight_on_off MUTE YPBPR_R DVD_On/Off MUTE YPBPR_R DVD_On/Off UOCIII_SDA YPBPR_L IRDATA/SCL UOCIII_SDA YPBPR_L IRDATA/SCL State/SDA State/SDA Model No.: LCT-32CHSTP Version: 1.0...
  • Page 54 C624 C625 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 3.3VSDRAM2 C626 C627 C628 C629 FSCLK+ 0.1uF 0.1uF 0.1uF 0.1uF R603 150(140) FSCLK- 3ODFH WKLV S DUDOOHO WHUPLQDW LRQ FORVH WR FRUUHVSRQGLQJ PHPRU\ ,& 3LQV Model No.: LCT-32CHSTP Version: 1.0...
  • Page 55 Serial Interface Debug3 17: LOW (8bit bus with OCM access external ROM) OCMADDR8 18: HIGH OCMADDR13 19: LOW OCMADDR14 OCMADDR12 BOOTSTRAP HEADER OCMADDR15 OPEN=1 SHUNTED=0 RN801A INT_OSC OCMADDR16 8-BIT_FLASH2 OCMADDR18 R800 8-bit_flash1 OCMADDR17 R801 8-bit_flash3 OCMADDR19 Model No.: LCT-32CHSTP Version: 1.0...
  • Page 56 Q505 2SC2712Y +5V_4A Leave 1sq inch- exposed copper area attached to Tab of U907 +5V_ANG U508 U506 R512 +5V_SW LM1117DTX-3.3 +3.3V_ADC TO-252 IRF7314 SO-8 R515 C512 C514 C516 47uF/10V 0.1uF 47uF/6.3V R518 100K Q504 2SC2712Y Model No.: LCT-32CHSTP Version: 1.0...
  • Page 57 Leave 1sq inch- exposed copper area attached to Tab of U408 Leave 1sq inch- exposed copper area attached to Tab of U408 ASSEMBLE RN710, RN711,RN712,RN713 WHEN FLI2310 IS NOT PRESENT DO NOT ASSEMBLE TO RN700 TO RN707. Model No.: LCT-32CHSTP Version: 1.0...
  • Page 58 OCMDATA2 D_GND C786 OCMDATA1 OCMDATA1 C788 C789 C790 R714 OCMDATA0 MSTR_SCL OCMDATA0 C787 0.1uF 3.3K MSTR_SDA 47uF/6.3V 0.1uF 0.1uF 0.1uF 24LC32A-I/SN SOIC8 (150mil BODY) +3.3V_LVDSB C792 C793 C794 C791 OCMDATA[0..7] OCMDATA[0..7] 47uF/6.3V 0.1uF 0.1uF 0.1uF Model No.: LCT-32CHSTP Version: 1.0...
  • Page 59 0.1uF 0.1uF 0.1uF DPF_B CON-13 R324 R395 R394 C350 0.1uF GND GND NLAS4052 Truth Table R355A R329 R378 FUNCTION COMA=NO0A; COMB=NO0B COMA=NO1A; COMB=NO1B GNDGND GND GND COMA=NO2A; COMB=NO2B R361A COMA=NO3A; COMB=NO3B Inhabit=1:All output is open. Model No.: LCT-32CHSTP Version: 1.0...
  • Page 60 K202 R264A R256 K9656M(K9352M/D CHINA)) VCC5A TDA9178T UOCIII TAD12019H R248 4.7K UOCIII TAD12019H D205 R245 2CK75D +12V_DC R254 R249 Q202 SAW_SW 2.2K R251 C283 2SC1815Y 2.2K 0.01uF H: L' L:BG/DK/I (EUROPE) H: BG/DK/I L:M/N (CHINA) Model No.: LCT-32CHSTP Version: 1.0...
  • Page 61 VCC5A RA47 MM_SCL MM_SCL R322 UOC_SW1 UOC_SW1 UOC_SW2 R352 UOC_SW2 CA31 0.1uF 10V220uF 0.1uF Tuner_IF UOCIII_SDA UOCIII_SDA Tuner_IF Q308 UOCIII_SCL UOCIII_SCL 2SC1815Y SDA-7166102050 UOCIII_write_ctrl= +5V, UOC CONNECT WITH 1601 UOCIII_write_ctrl= 0V, UOC CONNECT WITH VGA Model No.: LCT-32CHSTP Version: 1.0...
  • Page 62 100u 0.47u SPDIF/L +5VE +12V_AUDIO +12V_AUDIO SPDIF_SW AVDD 100u CA41 CA35 High is shut down the erphone CA36 0.1u 0.1u CON-4 CA40 CA27 TPA6110A2 0.1uF 33uH CA26 CA43 0.1uF JUMP 0.47uF CA28 33uH 0.1uF CON2 Model No.: LCT-32CHSTP Version: 1.0...
  • Page 63 AU 26: 1K 3.3k V1.8CONTROL +5VB V1_8V1 +12V_AUDIO RA53 +12V_3A IRF7134 0.27/0.5W CP23 +5VB D3.3V 10uH V3_3A CP22 0.1uF 47uF SOD4001 CP18 CP14 +12Vaudio_ctrl 0.1uF CP11 CP20 0.1uF 10V100uF CP24 0.1uF 0.1uF CP16 CP17 0.1uF 10V100uF Model No.: LCT-32CHSTP Version: 1.0...
  • Page 64 NO0A Inhibit NO3A +5V_MUX ADDB ADDA RA25 NLAS4052 RA23 4.7k NLAS4052 Truth Table A FUNCTION RA27 TXT_or_Video1_SEL COMA=NO0A; COMB=NO0B COMA=NO1A; COMB=NO1B H Video1 Y L TXT Video COMA=NO2A; COMB=NO2B COMA=NO3A; COMB=NO3B Inhabit=1:All output is open. Model No.: LCT-32CHSTP Version: 1.0...
  • Page 65 10uF J400B J400A Y_YPBPR SC1_BIN B_YPBPR AVS1 R_YPBPR SC1_GIN SC1_Laudio SC1_RIN SC1_Raudio FBLIN1 YPbPr_L Scart1VideoIN YPbPr_R SCOL +12V_dc SCOR AVOUT +32V SC2_RIN SC2_LIN AVS2 Scart2_CIn +5VB Scart2_VideoIn SubchannelTV UOC_SW1 UOC_SW2 Tuner_IF UOCIII_SDA UOCIII_SCL 50PIN_12 50PIN_12 Model No.: LCT-32CHSTP Version: 1.0...

  • Page 66: Wiring Diagram

    -66 - WIRING DIAGRAM Model No.: LCT-32CHSTP Version: 1.0...

  • Page 67: Exploded View

    5. After finish unit assembly, fix protect corner cushion on the four corner of front frame using blue adhensive tape. 6. After unit is passed examination, paste certification, DVD label and fragile label on the surface of back cover. Require position of pasting should be consistent. Model No.: LCT-32CHSTP Version: 1.0...

  • Page 68: Part List

    PART NAME Chassis module Front frame module Back cover module Pedestal module Plug with line Power bracket Power filter Screw M3x6 Screw M3x8 Screw M3x8 Screw M4x8 Screw M4x20 Screw M3x10 Screw M3x12 Screw 6x16 Model No.: LCT-32CHSTP Version: 1.0...

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