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TCL LCD20V6AT Service Manual

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SERVICE MANUAL
1. Caution.................................................2
2. Specification...........................................6
3. BOM List...............................................8
4. Alignment Procedure...............................14
5. Circuit Block Diagram..............................15
6. Schematic Diagram.................................18
7. Explode View Diagram.............................27
This manual is the latest at the time of printing, and does not
include the modification which may be made after the printing, by
the constant improvement of product.
LCD20V6AT

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Summary of Contents for TCL LCD20V6AT

  • Page 1: Table Of Contents

    SERVICE MANUAL LCD20V6AT 1. Caution………………………………………….2 2. Specification…………………………………….6 3. BOM List………………………………………..8 4. Alignment Procedure………………………….14 5. Circuit Block Diagram…….…………………..15 6. Schematic Diagram……………………………18 7. Explode View Diagram………………………..27 This manual is the latest at the time of printing, and does not include the modification which may be made after the printing, by...

  • Page 2: Caution

    SCHNEIDER ELECTRONICS GMBH-GERMANY 1. CAUTION CA UTION: Use of controls, adjustments or procedures other than those specified herein may result in hazardous radiation exposure. CA UT ION : T O RE DUCE TH E RIS K OF CA U T ION ELECTR ICA L SHOCK, DO NOT RE MOVE COVER (OR BACK).
  • Page 3 SCHNEIDER ELECTRONICS GMBH-GERMANY IMPORTANT SAFETY INSTRUCTIONS CAUTION: Read all of these instructions. Sa ve these instructions for later use . Follo w all W arnings and Instructions marked on the audio equipment. 1. Read Instructions-All the safety and operating instructionsshouldbe read before the productis operated. 2.
  • Page 4 SCHNEIDER ELECTRONICS GMBH-GERMANY PROTECTION AND LOCATION OF YOUR SET Do not use this television set near water ... for example, near a bathtub, washbowl, kitchen sink, or laundry tub, in a wet basement, or near a swimming pool, etc. Never expose the set to rain or water. If the set has been exposed to rain or water, unplug the set from the wall outlet and refer servicing to qualified service personnel.
  • Page 5 SCHNEIDER ELECTRONICS GMBH-GERMANY OPERATION OF YOUR SET 18. This television set should be operated only from the type of power source indicated on the marking label.If you are not sure of the type of power supply at your home, consult your television dealer or local power company. For television sets designed to operate from battery power, refer to the operating instructions.

  • Page 6: Specification

    2. SPECIFICATION Operation Temperature( ): ℃ 0～50 Store Temperature( ): ℃ -20~60 Environment Operation Humidity(%): 20%~90%RH(0~40℃) Store Humidity(%): 20%~90%RH(-20~40℃) Air Pressure(kps) Screen Size(inch)：20.1 Panel size(mm x mm x mm): 448.6mm(H) X 339.6mm(V) X 23.6 (D) Effective Size(mm x mm)： Panel Type：TFT LCD mm(H) X mm(V) Angle of View (H/V)：...
  • Page 7 □Composite Video (□RCA □Other： ) □BNC □SCART Video □Audio Output (L/R) (□RCA) □Audio Output 5.1 □Speaker (Insert Amplifier) Output Audio □Audio Digital Coaxial (RCA) □Audio digital optical ■Earphone Output OSD: Languages： □Chinese ■English ■Russian □Other: Adjustment via OSD: ■Contrast ■Chroma ■H/V - size （YCbCr） □Picture Rotation ■Brightness ■Tint ■H/V - position （YCbCr） □Other： Certification □CCC □CE...

  • Page 8: Bom List

    3.Bom List ITEM SPEC. LOCATION T6-0Q0036-H027X REMOTE HANDSET ASSEMBLY 11-0BC337-0BX TRANSISTOR (NPN) BC337-40 13-00AS12-13B IC AS1213B 14-IRE05B-XX0 IR EMITTING DIODE TSAL6200 18-CB0221-JNX RES. C.F. 220 OHM 1/6W +/-5% 18-CB0229-JNX RES. C.F. 2.2 OHM 1/6W +/-5% 25-HBB479-M1X CAP. ELEC 4.7 UF 10V +/-20% 26-EBP101-JCS CAP.
  • Page 9 ITEM SPEC. LOCATION 02-IRR001-XX1 IR RECEIVER MODULE HRM380017 IR01 11-SC1815-YBX TRANSISTOR 2SC1815-Y (NPN) Q1001 LED RED Φ3MM FO203 14-LED03R-XX1 LED1001 18-CB0100-JNX RES. C.F. 10 OHM 1/6W +/-5% R1008 18-CB0103-JNX RES. C.F. 10K OHM 1/6W +/-5% R1006 18-CB0122-JNX RES. C.F. 1.2K OHM 1/6W +/-5% R1005 18-CB0182-JNX RES.
  • Page 10 ITEM SPEC. LOCATION 12-BT3904-0BX SMD. TRANSISTOR MMBT3904LT1(NPN) Q8;Q9;Q7 13-024LC1-6BB IC 24LC16B 13-1117MP-18B IC LM1117MPX-1.8 U14;U13 13-39SF02-0AB IC 39SF020A-PLCC32 (WRITE) 13-AT24C0-20B IC AT24C02 SO-8 EEPROM 2K BIF(WRITE) 13-GM2221-00B SCALER IC GM2221 13-IC1084-CMB IC AIC1084-33CM 3.3V (TO-263) 12-30PF03-0BX TRANSFORMER STD30PF03LT4 13-LD1117-33B IC LD1117 3.3V 13-MIC457-6UB IC MIC4576-5.0 13-PI5V33-0QB...
  • Page 11 CHIP BEAD 30 OHM +/-25% L16;L17;L2;L1;F1;L20;L21;L22;L23;L24;L11; L10;L39;L48;L52 33-KLL279-KTX SMD. COIL 2.7UH +/-10% 0603 L37;L36;L35;L34;L30 33-KLN121-NTX CHIP BEAD 120 OHM +/-25% R114 36-LIF020-XX0 LINE FILTER LC-33-TCL 40-20V8AT-DIB4X P.C.B DIGIBOARD 43-SFSS11-2DM RELAY SF-SS-112DM RELA1 45-OSC14M-3Y2 CRYSTAL 14.31818MHZ X2;X1 46-33079W-04X PIN BASE *4 TJC3-4A 46-35199W-02X CONN.
  • Page 12 ITEM SPEC. LOCATION 46-40001H-50X HS 50PIN PSK0500035A-006222 VER 0 46-FF045F-07B 6P UL1007#26 450MM 46-FH006F-10P01 UL20080#28 PH-10Y/JC20-5Y+JC25-5Y J4、J8 47-PWS012-XX0 SOCKET DSW-47 47-RCA125-XX1 RCA SOCKET AV-3.2-3W-051 47-VGA002-XX0 VGA JACKET D-SUB-15WP 64-B30080-104 M/C SCREW B 3 X 8 FOR U11 65-Z30050-23M NUT M 3 FOR U11 67-387190-0A0 HEAT SINK...
  • Page 13 ITEM SPEC. LOCATION 25-BCB100-M1X CAP. ELEC 10 UF 16V +/-20% C701;C724;C560 25-BCB471-M1X CAP. ELEC 470 UF 16V +/-20% C542;C704;C703 25-BDB221-M1X CAP. ELEC 220UF 25V +/-20% C549;C548 25-BDB470-M1X CAP. ELEC 47 UF 25V +/-20% C528;C522;C527;C530;C513 25-BFB100-M1X CAP. ELEC 10 UF 50V +/-20% C537;C524;C550;C551;C536;C511 25-BFB220-M1X CAP.

  • Page 14: Alignment Procedure

    4. ALIGNMENT PROCEDURE Flowchart of alignment procedure 1. Adjustment 2, 3. Adjustment of Check in VGA mode White Balance setting Factory mode To enter the Factory Mode Press MENU button to e nter the main menu, and press the password “3210” continuously to enter the Factory Mode.

  • Page 15: Circuit Block Diagram

    2) Auto adjustment in TV/AV mode: A. Switch to AV mode. B. Input the Gray Scales signal. C. Set the picture mode to Standard. D. Enter the Basic Setting of Factory Mode to adjust Blacklight until the second dark scale is just visible. E.
  • Page 16 BLUE Manually adjusting ADC in PC mode. RED OFFSET Manually adjusting ADC in PC mode. GREEN OFFSET Manually adjusting ADC in PC mode. BLUE OFFSET Manually adjusting ADC in PC mode. Note: If the White Balance is adjusted automatically, the manual adjustment will not be available.
  • Page 17 DIAGRAM LCD PANEL LVDS OR TTL FLASH GM2221 39SF020A I2C BUS TUNER AMPLIFIER CVBS SWITCH PHILIPS MSP3410 1517 PI5V330Q TVP5147 1316 R G B Y U V CVBS ADAPTER AC INPUT 12V DC...

  • Page 18: Schematic Diagram

    GM21 LCD TV__for EU CONTENTS SCHEMATIC SHEET 01. Contents 02. Input 03. GM2221 04.SPI/RESET/KEYPAD 05. LVDS_ Out 06. TTL_ Out 07. Power 08. VIDEO DECODER Approval Organization Signature Date 04-05-17 Title GM21 Size Document Number 040108 Date: Tuesday, October 18, 2005 Sheet...
  • Page 19 DVI INPUT DVI test points right on the trace to avoid extra length CONNECTOR NOT TO BE MOUNTED VGASCL 100R DDC_SCL_VGA VGASDA 100R DDC_SDA_VGA BAT54C VGA_5V VGACON 5V_VGA BAV99 BAV99 VGA_5V EDID VGA 0.1uF 100R VGA_SCL RMADDR8 A-BLUE +5V_MUX For update 100R VGA_SDA A-GREEN...
  • Page 20 AVDD_1.8 +3.3V_AVDD 3.3V_AVDD CVDD_1.8 3.3V_DVDD Close to respective power Pins CVDD_1.8 33R FB 3.3V_DVDD 22uF/16V 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 3.3V_AVDD AVDD_OUT_LV_E_33 AVDD_OUT_LV_E_33 +3.3V_DVDD 3.3V_DVDD AVDD_LV_33 AVDD_OUT_LV_O_33 LV_E[0..9] Close to respective power Pins Close to respective power Pins AVDD_OUT_LV_O_33 VCO_LV LV_E9...
  • Page 21 Keypad INTERFACE NV RAM INTERFACE 0.1uF GPIO9/SCL MCSCL GPIO10/SDA MCSDA 24LC16B CVBS2 CVBS2 CVBS1 CVBS1 SVIDEO_Y SVIDEO_Y SVIDEO_C SVIDEO_C SWICH1 SWICH3 AMP_MUTE Vin2 RET_OTHER Vout2 CON5 IR REMOTE SENSOR TELE_INR INTERFACE EXTERAL AV CON15 BOARD MCSCL INTERFACE MCSDA CON3 Audio_InR2 x2.0mm Audio_InL2 Audio_OutR2...
  • Page 22 +12V Backlight Inverter Connector BKLT_ADJ 470R BKLT_EN BKLT_EN 0.1uF 0.1uF PWM0 0.1uF 22uF/16V CON7 PBIAS PBIAS 5 MMBT3904L MMBT3904L LVDS test points right on the trace to avoid extra length PANEL_POWER TXO0- LV_O[0..9] LV_O0 TXO0- LV_O1 TXO0+ TXO1- TXO1+ TXO0+ TXO2- +12V +3.3V_DVDD...
  • Page 23 PANEL_POWER PANEL_POWER LV_E[0..9] ER[0..7] SHT-6 LV_E9 LV_E8 LV_E7 LV_E6 LV_E5 22Rx4 LV_E4 LV_E3 LV_E2 22Rx4 EG[0..7] SHT-6 LV_E1 22Rx4 LV_E0 LV_O[0..9] LV_O9 LV_O8 LV_O7 LV_O6 LV_O5 LV_O4 22Rx4 EB[0..7] SHT-6 LV_O3 22Rx4 LV_O2 LV_O1 LV_O0 87089-40 PD[20..23] PD20 PD21 PD22 PD23 22Rx4 SHT-5,6...
  • Page 24 +12V LM2596S-5.0 31ohm at 100Mhz Rated Currrent >=2A 33R FB 33R FB VOUT RELA1 33R FB 33R FB 0.1u 33uH 33R FB CONTROL 0.1uF 0.1uF +12V IN5820 0.1uF 33R FB 0.1uF 1N4148 0.1u 100P 0.1u 100uF/16V 33R FB POWER IN 330uF/16V 330uF/16V 33R FB...
  • Page 25 DECBIN DECGIN DECRIN DEC_FB DECODER_VS DECODER_HS DECODER_VS 100R TP16 TELE_SDA DECODER_HS R100 100R TELE_SDA TP17 C117 CON10 14.318Mhz FOR TELETEXT TP18 A_3.3V 33pF A_1.8V R103 120 2.7uH 2.7uH C118 D_1.8V A_3.3VD_3.3V CVBS2 CVBS2 +3.3V_DVDD C119 C120 C121 C122 D_3.3V 33R FB L32 33R FB CVBS_OUT 4.7pF...
  • Page 26 AV1-R AV1-L PC_R PC_L LCD20V6AT.Analog R534 R535 R536 R537 R538 R539 C552 C553 C554 C555 C557 PC_R PC_L C556 C709 JP702 R710 3K3 22U/16V C536 C537 10u 25v C535 C534 C550 C551 R712 R713 10u 25V 100K 10u 25v R715 3K3...