akira LCT-37CH01ST Service Manual
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akira LCT-37CH01ST Service Manual

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Summary of Contents for akira LCT-37CH01ST

  • Page 1 LCD TV Service Manual...
  • Page 2 -2 - MODEL: LCT-37CH01ST Model No.: LCT-26CH01ST.doc Version: 1.0...

  • Page 3: Table Of Contents

    LIST OF CRITICAL PARTS ..................... 64 FACTORY MODE SETTING & NOTES................... 65 APPENDIX ........................69 1) SCHEMATIC DIAGRAM OF CHASSIS 2) SCHEMATIC DIAGRAM OF POWER MODULE 3) ASSEMBLY DIAGRAM 4) WIRING DIAGRAM 5) EXPLODED VIEW AND PART LIST Model No.:LCT-37CH01ST.doc Version:1.0...

  • Page 4: Safety Precaution

    Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 5 Model No.:LCT-37CH01ST.doc Version:1.0...

  • Page 6: Specification

    Model No.:LCT-37CH01ST.doc Version:1.0...

  • Page 7: Appearance Of Remote Control

    TV off mode. Notice: In this manual, the icon with “< >” means the button on the remote control, the icon with “[ ]” mean the button on the LCD TV. Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 8 Video and RGB signal input, Video signal (RF VIDEO signal) output ○ SCART2 Video and Y/C signal input, Video signal (RF VIDEO signal) output ○ Headphone Port for headphone audio output ○ Output TV Signal input TV signal input port ○ Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 9 REMOTE CONTROL The buttons of the original remote control are as following: Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 10 Model No.:LCT-37CH01ST.doc Version:1.0...

  • Page 11: Operation

    Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 12 Model No.:LCT-37CH01ST.doc Version:1.0...
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  • Page 23: Characteristic Of Chassis

    Plug and Play in real sense 2. Circuit constitution AKIRA LCD TV with LS01 chassis is made up of switch power, system control circuit, video processing circuit, audio processing circuit, sound power amplifier circuit, AV input circuit, LCD screen module. Block circuit diagram of the whole machine is shown as below: Model No.:LCT-37CH01ST.doc...
  • Page 24 1) European market: Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 25 2). American and Asian market: Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 26 3. Introduction of printed board module AKIRA LCD TV with LS01 is made up of power board, side AV board, remote control reception board, key board, and mainboard. The table below is the introduction of the function of all printed board modules.

  • Page 27: Function Of Ics

    12V to 8V DC level conversion CS4344-CZZ HDMI digital audio decode, D/A conversion U28、U29 Rclamp0514M.TBT ESD protection device of HDMI input terminal ANX9011L HDMI digital signal decode PI5C3306LE Bus (SDA, SCL) switch used for program update TDA8944J Sound power amplifier (BTL output) Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 28 ● Support 60Hz～100Hz interlace scanning and 50Hz～75Hz non-interlace scanning ● PC and video frame format conversion ● 14D dynamic video enhancement ● Pulse width modulation ● Build-in A/D conversion function ● Teletext function / Multi-image browse mode ● Provide 16/32bits SDR memory interface Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 29 VREFP_2 A/D conversion 2 differential positive voltage VREFN_1 A/D conversion 2 differential negative voltage Digital signal terminal ┆ ┆ DP10 DP11 DP12 Digital signal I/O（DP0~DP23）interface DP13 DP14 ┆ ┆ DP18 DP19 ┆ ┆ DP23 CPU control terminal Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 30 SCART1 interface CVBS signal output TEST MODE Test mode signal (grounding) AIN_HS Line synchronization signal AIN_VS Field synchronization signal XTALI Crystal oscillator interface XTALO SDRM ┆ ┆ Memory address （A0~A11） ┆ ┆ MA10 MA11 DQM0 Memory read/write byte signal DQM1 DQM2 Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 31 LVDS ground LVDSVCC LVDS channel power TCLK1M High, low differential clock port TCLK1P TA1 M TA1P TB1M TB1P High, low differential data port TC1M TC1P TD1M TD1P Clock and power VDDM VDDM Memory port digital power VDDM VDDM Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 32 PLL digital ground power (+1.8V) PAVSS PLL Digital ground PAVDD PLL digital ground power(+1.8V) PDVSS PLL Digital ground PDVDD PLL digital ground power (+1.8V) AVDD_ADC1 AVDD_ADC2 ADC analog power (+1.8V) AVDD_ADC3 AVDD_ADC4 AVSS_ADC1 ADC analog ground AVSS_ADC2 Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 33 AVSS_ADC3 AVSS_ADC4 AVDD3_OUTBUF +3.3V analog power AVSS_OUTBUF AVDD3_BG_ASS Analog ground AVSS_BG_ASS Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 34 SVP-CX32LF internal block diagram: Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 35 ● 53 I/O pins ● Reserved wait function ● Clock control fs=32.768KHz real-time time of time conversion function high frequency fc to fc/16 ● Working voltage When fc=27 MHZ, VCC=2.7~3.6V, when fc=10MHZ, VCC=1.8V to 3.6V ● 64 pin package（P-LQFP64-1010-0.50D standard） Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 36 Pin allocation description: Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 37 8~15 bit address channel P17/AD15/A15 P20/A0/A16 8~5 bit address channel ┆ ┆ or 8~21 bit address channel P25/A5/A21 P30/ External memory read control terminal P31/ External memory write control terminal (AD0~AD7) P32/ Data write control terminal (AD8~AD15) Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 38 Internal address selection signal P41/ P42/ P60/SCK (no connection) P61/SO/SDA I²C bus data P62/SI/SCL I²C bus clock P63/INT0 Interrupt request signal P50/AN0 KEY control terminal P51/AN1 P52/AN2 SCART1 interface FS signal P53/AN3/ SCART2 interface FS signal AVCC Analog power （+3.3V） Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 39 T5BS4-9999 internal functional block diagram： Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 40 ● THRU mode ● 2 VRMS capability Pin introduction: Designation Function Description SC1_OUT_L SCART1 left audio output SC1_OUT_R SCART1 right audio output VCC_H +8V power GND_H ground SC3_OUT_L SCART3 left audio output SC3_OUT_R SCART3 right audio output Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 41 Loudspeaker right channel output LS_SUB No connection HP_LSS_L No connection HP_LSS_R No connection VSS18_CONV DAC/ADC ground VDD18_CONV DAC/ADC power (8V) /HP_DET Earphone connection test terminal ADR_SEL Chip address selection signal VSS18 Digital ground VDD18 +1.8V power I²C bus clock Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 42 I²S bus data input stereo channel 2 I2S_DATA2 I²S bus data input stereo channel 3 VDD18 +1.8V Power VSS18 Ground BUS_EXP Bus extension selection No connection GND_PSUB Ground VDD18_ADC +1.8V Power VSS18_ADC Ground SIF_P Intermediate audio input (positive terminal) Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 43 Designation Function Description SIF_N Intermediate audio input (negative terminal) GNDPW_IF Ground VCC18_IF +1.8V Power GND18_IF Ground MONO_IN High frequency head audio input SC4_IN_L SCART4 left audio input SC4_IN_R SCART4 right audio input Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 44 STV-8217 internal block diagram: Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 45 STV-8218 internal block diagram: Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 46 MODE Operation mode selection (standby, mute, work) Voltage decoupling filtering (grounding) IN2 Positive pole input terminal 2 N.C. No connection OUT2 Loudspeaker negative output terminal 2 GND2 Ground VCC2 +12V Power OUT2+ Loudspeaker positive output terminal 2 Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 47 ● Digital audio interface 32-192kHz audio sampling rate Provide 4-channel IIS interface for 8 audio channels Mute software configuration ● HDCP decryption technology ● PRBS 31 link auto-test technology ● Controllable Power protection management system ● 128 pin LQFP packaging Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 48 VDO8 VDO7 ┆ ┆ VDO4 VDO3 ┆ ┆ VDO0 VD_CLK Video output data clock Video output data effective level signal HSYNC Line synchronizing signal VSYNC Field synchronizing signal Digital audio output terminal XTAL_IN Crystal oscillator interface XTAL_OUT Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 49 AVDD33 47, 49, 53, 57, 61, 86, +3.3V analog Power DVSS 6, 13, 18, 25, 30, 37, 65, 69, 78, 80, 97, 106, Digital ground 113, 118, 126 AVSS 46, 52, 56, 60, 64, 83 Analog ground Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 50 Its main features are: ● -5V to +5V widely range Power input ● Low on-resistance ● Logical level alternating ● Build-in interrupt before running ● In line with JEDEC no.7A standard ● Automatic protection function Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 51 AV left audio input Ground Ground Ground Select level input （+3.3V Power） SCART2 right audio input PC right audio input Right audio output AV right audio input HD terminal right audio input +5V Power 74HCT4052D internal block diagram: Model No.:LCT-37CH01ST.doc Version:1.0...

  • Page 52: Signal Processing Analysis

    Pin 3 FB34 CON11 Pin 1,2,3 +12V（voltage of line to screen） CON1 Pin 1,2,3,4 (used by 37 inches screen) 12V power amplifier TDA8944J +12V power Pin 3,16 supply CON403 FB34 Pin 3,4 12V shutdown mute circuit Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 53 FB22 SVP-CX32 Pin 46, 39, 52 L1,2 SVP-CX32 Pin 155,156 IS42S32200C1-6TL Pin 1,15,29,43,3,9,35,41,49,55,75,81 SVP-CX32 Pin 98, 108, 134,146 FB21 ST8217 Pin 7,16,20,22 ST8217 Pin 46 L28,29,22 ST8217 Pin51 AZ1117H-1.8TRE1 ST8217 Pin 42,76,54 +1.8V Y4 27MHz XO voltage Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 54 Pin 18 CON14 Pin １ U3（ AT24C64A-10PU-2.7 ）Pin 8 CON17 Pin １ U8（ TCM809SENB713 ） Pin 3 U6（ 74ALVC573PW ） CON5 Pin 1 Pin 20 Q8、9（2SK1399） Pin１ Q10、11（2SC1815M-Y） Pin１ (3) Pin level schedule for Voltage regulators on mainboard Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 55 AZ78L08ZTR-E1 (4) Pin sequence of power cord of power panel Position Pin Definition Pin Function Description number ON/OFF L：OFF ；H：ON +5V/4A CON1 5Vstb +5V/1A 9,10 +12V/1A 12VA +12V/2A 3,4,5,6 CON2 24Vio +24V/1A 1,2,3 CON3 4,5,6 24VI +24V/4A Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 56 4. Position and definition of the main components and sockets on mainboard Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 57 +5V_SB , +5V_SB , GND , GND , Power supply control CON13 Standby CON8 Standby CON9 Speaker L+,L-,R+,R- CON10 Side AV board VGA audio signal input SCART2 input SCART1 input HDMI input HD, audio, video signal input S terminal input VGA input CON2 Standby Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 58 HDMI digital audio decoding and D/A conversion ANX9011L HDMI decoding, HDTV video/audio reproduction AT24C02BN-10SU-1.8 EEPROM U28、U29 Rclamp0514M.TBT HDMI signal ESD protective device STV-8217 Sound Processor 74HCT4052D AV input sound passage switcher TDA8944J 2X7W Sound Amplifier（BTL Output） JS-6H2/121 Tuner Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 59 RF inputting color bar signal, I²C bus clock signal SDA, pin 5, 6 of U31, pin 6 of U16, pin 39 of U35, pin 58 of U4, pin 40 of U30, pin 57 of U1, pin 4 of tuner U15: Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 60 RF inputting color bar signal, I²C bus clock signal SDA, pin 2, 3 of U31, pin 5 of U16, pin 40 of U35, pin 57 of U4, pin 39 of U30, pin 58 of U1, pin 5 of tuner U15: (4)RF inputting grey signal, Composite Video Signal waveform at pin 14 of tuner U15, the waveform at pin 169 of U1 （SVP-CX32LF） is alike: Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 61 (5)RF inputting white signal, SIF Signal waveform at pin 11 of tuner U15, and waveform at pin 73 of sound effect processing IC Stv-8217: (6)RF inputting white signal, and inputting sound signal with 1KHz frequency, inductance waveforms at pin 28, 29 of U35, and waveform of L26,L27: Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 62 (7)Inputting sound signal with 1KHz frequency, with the processing of U33 and power amplifier TDA8944J, waveform at pin 1, 4, 14, 17 of U33, and waveform at CON13 speaker and CON14earphone output interfaces: Model No.:LCT-37CH01ST.doc Version:1.0...

  • Page 63: Trouble Shooting

    The reason and the processing：Check other groups of voltage; if they have no outputs, then check Flash to find if it is installed well or damaged; if Flash is OK, find out that if the power supply and output voltage of U4 works well. Model No.:LCT-37CH01ST.doc Version:1.0...

  • Page 64: List Of Critical Parts

    Inner power module LCD screen V320B1-L04 LCD screen Electronic tuner JS-6H2/121 Electronic tuner Electronic tuner CDT-6GPL22-00 Electronic tuner YDT613-A9-10W-8 Dynamic speaker Dynamic speaker Ω YDG52-A3-10W-8 Dynamic speaker Dynamic speaker Ω Remote control Remote control emitter emitter GK23J2 Model No.:LCT-37CH01ST.doc Version:1.0...

  • Page 65: Factory Mode Setting & Notes

    Used for hotel TV Hotel Option Hotel mode submenu E²PROM data E²PROM Edit No setting editing Register Edit Register No setting Use 【P+】and 【P-】keys on remote control to make up or down option, and use【V+】 and【V-】keys to set. Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 66 LOGO display contents ， “ V+ ” 、 “ V- ” for choosing setting position,， “P+” 、 “P-”for Logo Edit AKIRA choosing letter， including 52 English big/small letters together Logo Color Logo Color Modified according to user’s require Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 67 Forced program number Force Video ext1 Forced AV input terminal Disable Keypad Open local key function or not Disable Remote Open remote receiving function or not Disable Setup Menu Open “setting” in OSD menu or not Notes： Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 68 (3)Switching TV program number in factory mode can be done by directly pressing the number key. Press【MENU】key to back to the parent of working directory, press 【DISPLAY】key to quit factory mode. Model No.:LCT-37CH01ST.doc Version:1.0...

  • Page 69: Appendix

    APPENDIX LS01 module Schematic Diagram （ Sample Model: LCT-32CH01ST ） Model No.:LCT-37CH01ST.doc Version:1.0...
  • Page 70 250mm IR_Key PWOR SUPPLY LVDS 512Kx8 T5BS4 SPEAKER -9999 LA4663 Europe SVP_CX32 24bit L1R1 ST82X7 Market PT2314 TUNER Y C,FS2 Sil9011 L2R2 CVBS1,RGB,FS1,FB1 L3R3 L4R4 4052 SVIDEO Y1Pb1PR1/CVBS/L3R3/L5R5 SCART1 SCART2 PC_AUDIO HDMI CVBS 250mm IR_Key PWOR SUPPLY LVDS 512Kx8 T5BS4 SPEAKER -9999 LA4663...
  • Page 71 CX_VL18 CX_PDVDD CX_VDDM CX_VDDM 150_Ohm_600mA CX_VD18 0.1uF 10uF CX_VD18_LOCAL CX_PDVSS 22uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 22uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 10uF 0.1uF 0.1uF 0.1uF 0.1uF 0.01uF 0.01uF 0.01uF 0.01uF CX_VL18 CX_VD33 CX_PAVDD CX_VD33 CX_VDDM SDRAM DECOUPLING CAPACITORS 150_Ohm_600mA 0.1uF 10uF...
  • Page 72 3.3V_SB 5Vstb R302 4.7K 3.3V_SB 3.3V_SB R303 R301 1.2K R266 2.0K SB_PWR 1000pF CON3 2.2K 2SC1815M-Y 4.7K 4.7K 4.7K 4.7K 4.7K 8051_CS2CX PAGE PAGE 3,7,8 3V_SDA SCLE 8051_WR# 3,7,8 3V_SCL SDAE 8051_RD# CX_INT# 3.3V_SB KEYB 100pF 100pF C402 3.3V_SB AT24C64A-10PU-2.7 KEYA 0.1uF E_PAGE...
  • Page 73 Definition In CX32 Solution(Europe Market) Definition In CX32 Solution(Asia&USA Market) Definition In CX32 Solution(Europe Market) Definition In CX32 Solution(Asia&USA Market) R268 Definition Video Signal Definition Video Signal Name Definition Audio Signal Name Definition Audio Signal Name Name Input Signal Input CX32 Pin Input Signal Input CX32 Pin MAIN TUNER...
  • Page 74 L2110uH 1.8aV 3.3aV ST_1.8V ST_3.3V 10uH ST_1.8V R153 ST_1.8V RESET_L R154 470K ST_3.3V L28 10uH 1.8aV 27pF 27pF ST_1.8V C189 C190 3.3aV 27MHz 5V_SCL R155 100R 5V_SDA R156 100R SC1_LOUT SC1_LIN RN29 100x4 AUDIO_LIN I2S_SCLK R160 100R 5V_SDA 5V_SDA IIS_SCK IIS_SCK I2S_LR_CLK IIS_WS...
  • Page 75 POWER SUPPLY INPUT INTERFCE 3.3V_SB STANDBY : 0 CON14 POWER SUPPLY MODUEL USE MEGMEET MLT186 POWER ON : 1 CON11 FB18 R198 11x2.0mm 150_Ohm_4000mA CON12 FB19 5V_SB 2.0K 5x2.0mm 150_Ohm_2000mA C263 470uF/25V 4PIN C257 C265 C266 CON13 FB20 0.1uF 0.1uF 150_Ohm_4000mA 220uF/16V CON17...
  • Page 76 3.3V_SB R427 BAV99 5V_SB R272 Q405 4.7K 2SC1815M-Y IN_5V R428 3V3S C365 C334 C328 C327 C338 C347 C342 C356 C349 C360 C354 C355 C357 HDMI_HOTPLUG C320 0.1uF 2.0K 10uF/16V 0.1uF 0.1uF 0.1uF 0.1uF 1000pF 1000pF 1000pF 1000pF 1000pF 1000pF 1000pF 1000pF RX_INT# SCDT...

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