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BBK LT2619SU Service Manual

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Service Manual
LT2619SU/LT2621SU

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Summary of Contents for BBK LT2619SU

  • Page 1 Service Manual LT2619SU/LT2621SU...

  • Page 2: Table Of Contents

    LCD TV Service Manual Contents Contents................................- 2 - Service Manual ..............................- 3 - 1. Precautions and notices..........................- 3 - 1.1 WARNING ............................- 4 - 1.2 NOTES ............................- 7 - 2. Product Function Specifications ......................- 10 - 2.1 Product Function..........................- 10 - 2.2 Specifications..........................- 12 - 3.

  • Page 3: Service Manual

    LCD TV Service Manual Service Manual 1. Precautions and notices BEFORE SERVICING THE LCD TV, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. WHEN REPLACEMENT PARTS ARE REQUIRED, BE SURE TO USE REPLACEMENT PARTS SPECIFIED BY THE MANUFACTURER. - 3 -...

  • Page 4: Warning

    LCD TV Service Manual not undertaken any such broad evaluation. Accordingly, a serviceman that uses a service procedure or tools, which are not recommended by Hisense, must first satisfy himself thoroughly that neither his safety nor the safe of the equipment will be jeopardized by the service method selected.
  • Page 5 LCD TV Service Manual 1.1.2. All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD). Careless handling during repair can reduce life drastically. When repairing, make sure that you are connected with the same potential as the mass of the set by a wristband with resistance.
  • Page 6 LCD TV Service Manual cable clamps. -The insulation of the mains lead should be checked for external damage. 1.1.6 (1) Do not touch Signal and Power Connector while this product operates. Do not touch EMI ground part and Heat Sink of Film Filter. (2) Do not supply a voltage higher than that specified to this product.

  • Page 7: Notes

    LCD TV Service Manual (7) Do not pull out or insert the power cable from/to an outlet with wet hands. It may cause electric shock. (8) Do not damage or modify the power cable. It may cause fire or electric shock. (9) If the power cable is damaged, or if the connector is loose, do not use the product: otherwise, this can lead to fire or electric shock.
  • Page 8 LCD TV Service Manual been turned off. • While the main power is on, do not touch any parts or circuits other than the ones specified. If any connection other than the one specified is made between the measuring equipment and the high voltage power supply block, it can result in electric shock or activation of the leakage-detection circuit breaker.
  • Page 9 LCD TV Service Manual the original routing and fixing configuration when servicing is completed. All the wires are routed far away from the areas that become hot (such as the heat sink). These wires are fixed in position with the wire clamps so that the wires do not move, thereby ensuring that they are not damaged and their materials do not deteriorate over long periods of time.

  • Page 10: Product Function Specifications

    LCD TV Service Manual 2. Product Function Specifications 2.1 Product Function - 10 -...
  • Page 11 LCD TV Service Manual - 11 -...

  • Page 12: Specifications

    LCD TV Service Manual 2.2 Specifications - 12 -...

  • Page 13: Lcd Panel Spec

    LCD TV Service Manual 3. LCD Panel Spec 3.1 General Description V260B1- L02 is a 25.5” TFT Liquid Crystal Display module with 8-CCFL Backlight unit and RSDS interface. This module supports 1366 x 768 WXGA format and can display 16.2M colors (6-bits+FRC colors).

  • Page 14: Chassis Layout And Overall Wiring Diagrams

    LCD TV Service Manual 4. Chassis Layout and Overall Wiring Diagrams 4.1 Chassis Layout Description Part No Type/Model PCB/ Model Main Board 117379 RSAG2.908.1395-1\ROH RSAG7.820.1529\VERCROH Power Board 115429 RSAG2.908.1251\ROH RSAG7.820.1235\VER.C\ROH RUSB Board 114583 RSAG2.908.1189\ROH RSAG7.820.1272\VER.B\ROH TCON Board 115643 RSAG2.908.1268TP\ROH RSAG7.820.1330\VERC\ROH Keypad PCA 117301 RSAG2.908.1088-1\ROH...

  • Page 15: Wires And Cables Overall Wiring Diagrams

    LCD TV Service Manual 4.2 Wires and Cables Overall Wiring Diagrams - 15 -...

  • Page 16: Factory/Service Osd Menu And Adjustment

    LCD TV Service Manual 5. Factory/Service OSD Menu and Adjustment 5.1 To enter the Factory OSD Menu a. With factory RC (remote control) 1. Press “M” button and enter factory mode. 2. Press “Menu” button and enter factory OSD menu. 3 .
  • Page 17 LCD TV Service Manual Auto Calibration LOGO NULL Auto Color HISENSE Color Temp. Standard WELCOME RED COLOR GREEN COLOR EGYPT BLUE COLOR Option Factory Init SOURCE QingDao BRIGHT 0 HuangDao BRIGHT 50 Guiyang BRIGHT 100 shunde CONTRAST 0 Hungary CONTRAST 50 France CONTRAST 100 150 Australia...
  • Page 18 LCD TV Service Manual Test Pattern Version BLUE Version: Panel Type: V260B1- L02 (1366*768) FLASH : 5.2.2、Design Menu Design Menu Picture Mode Sound Mode Sound Settings Power Save PIP Option MOVESHARPNESS LipSync - 18 -...
  • Page 19 LCD TV Service Manual Picture Mode Sound Mode Standard 120Hz Standard Brightness 500Hz Contrast 1.5KHz Colour 5KHz Bright Brightness 10KHz Contrast Music 120Hz Colour 500Hz Soft Brightness 1.5KHz Contrast 5KHz Colour 10KHz Speech 120Hz 500Hz 1.5KHz 5KHz 10KHz Sound Settings VOLUME 0 VOLUME 1 VOLUME 20...

  • Page 20: Software Upgrading

    LCD TV Service Manual 6. Software Upgrading The software is upgraded by a burning tool- ISP_TOOL4.0.9, which can burn the program file“*．bin” to the main board of the unit 6.1 Get ready for upgrading 6.1.1 Install the ISP_TOOL4.0.9-------only for the first time update. 1、...
  • Page 21 LCD TV Service Manual Click the “system” icon as the following Choose the “hardware” option from the dialog window - 21 -...
  • Page 22 LCD TV Service Manual Click“device management” icon as the following Choose the port (COM and LPT1) Choose the ECP print port (LPT1） - 22 -...
  • Page 23 LCD TV Service Manual Click the port of print （LPT1）as the following Choose “port setting”option as the following - 23 -...
  • Page 24 LCD TV Service Manual Find the folder where the ISP_TOOL4.0.9 lies in. 2、 There are three folders/files in this folder together. DLPORTIO.dll and FTD2XX.DLL must be in the same folder Double click the ISP_TOOL4.0.9 icon, and then a dialog window will show as below. - 24 -...
  • Page 25 LCD TV Service Manual Click the Config button. And then a dialog window will show as below. Port Type setting is LPT1 Base Addr setting is 0x378 Draw on the front of “pin 1 switch UART/I2c” Speed setting is 99 As following Choose“SDA in”and setting “PIN”...
  • Page 26 LCD TV Service Manual Choose “SCL in”and setting “PIN” is “PIN11”。 Notes: Do not draw on the front of “Reverse High”。 As following Choose “SDA out”and setting “PIN” is “PIN4” Notes: Draw on the front of “Reverse High”。 As following。 Choose “SCL out”and setting “PIN”...
  • Page 27 LCD TV Service Manual After having finished all above, clicking the “Apply ”button to complete the configuration。 6.1.2 Hardware connecting You can update the software through a special tool (as following) - 27 -...
  • Page 28 LCD TV Service Manual Connect the Debug board to the TV use VGA interface, the other parallel port to the computer, just as the following。 - 28 -...

  • Page 29: Upgrading With The Isp_Tool4.0.9

    LCD TV Service Manual 6.2 Upgrading with the ISP_TOOL4.0.9 6.2.1 Double click the ISP_TOOL4.0.9 icon and a dialog window will show as following。 Click the“Read ”button。 - 29 -...
  • Page 30 LCD TV Service Manual Choose the update file from the folder。 - 30 -...
  • Page 31 LCD TV Service Manual The update file has been chosen successfully。 Click the“Auto”button and choose parameters as following。 Click the“Run”button Click the“connect”button,then show a dialog box as following。 - 31 -...
  • Page 32 LCD TV Service Manual If show above then click the“Run”button again and again，till show the following dialog window。 - 32 -...
  • Page 33 LCD TV Service Manual The above appears on the screen-the word “program ok”shows in the information displaying window,indicating upgrading is over。 6.2.2 After the update is over. Must Confirm the software Version in the Version Menu. If the update is successful, enter Factory Init Menu and select “Clear Unprotectly” a.

  • Page 34: Troubleshooting

    LCD TV Service Manual 7. Troubleshooting 7.1 Troubleshooting for Remote Control Remote control does not work Try new batteries Replace battery Replace RC Replace remote control Check IR receiver Change Led & IR board Replace Led & IR BD Change Led & IR cable Replace Led &...

  • Page 35: Troubleshooting For Function Key

    LCD TV Service Manual 7.2 Troubleshooting for Function Key Buttons does not work Replace tact switch Check switches Replace Key BD Check key board Check Key BD cable Change Key BD cable Replace main board - 35 -...

  • Page 36: Tv Won't Power On

    LCD TV Service Manual 7.3 TV won’t Power On TV won’t power on Make Sure Power Is LED light? Check Power source is live Inlet Replace Check Power BLUE Power Cord Cord Check/replace IR Only BD or Keypad one works Try Power on by Check signal RC and Button...

  • Page 37: Troubleshooting For Audio

    LCD TV Service Manual 7.4 Troubleshooting for Audio No sound Reconnect Check connecter Replace speaker wire Check speaker wire Replace speaker set Check speaker set Replace main board - 37 -...

  • Page 38: Troubleshooting For Tv/Vga/Hdmi Input

    LCD TV Service Manual 7.5 Troubleshooting for TV/VGA/HDMI input No picture on the screen Check Signal Source Make sure signal source is available Reconnect Check connect Replace cable Check cable Replace main board - 38 -...

  • Page 39: Troubleshooting For Ypbpr Input

    LCD TV Service Manual 7.6 Troubleshooting for YPbPr input No picture on the screen Check Source work or not Check Source Device Reconnect Check connect Check Wires (Green Blue, Red) Replace wires Replace main board - 39 -...

  • Page 40: Troubleshooting For Video/S-Video/ Scart Input

    LCD TV Service Manual 7.7 Troubleshooting for Video/S-Video/ SCART input No picture on the screen Check Source work or not Check Signal Source Reconnect Check connect Replace Cable/Wires Check Cable/ Wires Check SCART BD Replace SCART BD Replace main board - 40 -...

  • Page 41: Explode View

    LCD TV Service Manual 8. Explode View 9. Schematic circuit diagram - 41 -...
  • Page 43 LT2619SU PARTS LIST No. Part No. Description Qty. Code Number Remark 118625 Front Cover RSAG8.074.552\Z4\ROH 1052188 Bracket RSAG8.078.481\B2\Z3\ROH 1044829 Button Bracket RSAG8.335.067\Z0\ROH 117301 Keypad PCA RSAG2.908.1088-1\ROH 1046628 Speaker YDT4211E-5W8R-F\ROH 1036391 Block RSAG8.634.047\black\ROH 1050066 Bracket RSAG8.038.1303\ROH 118870 LCD Panel V260B1-L02\HS\BL\ROH 115429 Power Board RSAG2.908.1251\ROH...
  • Page 45 LT2621SU PARTS LIST Part No. Description Qty. Code Number Remark 118626 Front Cover RSAG8.074.556\Z3\ROH 1052188 Bracket RSAG8.078.481\B2\Z3\ROH 1044829 Button Bracket RSAG8.335.067\Z0\ROH 117301 Keypad PCA RSAG2.908.1088-1\ROH 1046628 Speaker YDT4211E-5W8R-F\ROH 1036391 Block RSAG8.634.047\black\ROH 1050066 Bracket RSAG8.038.1303\ROH 118870 LCD Panel V260B1-L02\HS\BL\ROH 115429 Power Board RSAG2.908.1251\ROH 1050067 Bracket...
  • Page 46 +12V_all BL-ADJ 0.1uF 0.1uF 16V 470uF 16V 470uF +5V_all R310 R310 BL-ON/OFF IPWM|GND L31 BLM31PG121SN1 L31 BLM31PG121SN1 +12V_all 5Vstb 5Vstb STANDBY BLM31PG121SN1 BLM31PG121SN1 5Vstb Vcc_A Vcc_A 4.7K 4.7K CON4_2.0 CON4_2.0 4.7K 4.7K POWER-ON/OFF POWER-ON/OFF POWER-ON/OFF 3904 3904 5Vstb +5V_all BL-ON/OFF 4.7K 4.7K ON-PBACK...
  • Page 47 VCC_USB5V XS11 XS11 USB3_5V DMP-VOUT USB2_5V DMP-VOUT C392 C392 100P 100P USB1_5V DMP-R DMP-L DMP-R MR_OUT ML_OUT DMP-L DMP-Y DMP-PB Y_OUT PB_OUT DMP-PR R404 R404 PR_OUT COM_PR COM_PB R407 R407 CVBS_IN COM_Y R520 R520 R406 47K R406 47K IR-in ON_USB 0 R526 R526 IR-in...
  • Page 48 VDD33 TESTPAD1 TESTPAD1 TESTPAD2 TESTPAD2 TESTPAD3 TESTPAD3 R211 10K R211 10K [ASIC Control] RESET RESET RESET VDD_1.8 VDD33 BIST POL_SI PDI MST7381B Cancel R212 R212 用于MST7381B与MST7382B兼容 R311 R311 GVOFF 4.7K 4.7K VDDC_T VDD33 VDD33 MST7381B C3=1uF MST7382B C3=0.1uF R172 R172 1uF/0.1uF 1uF/0.1uF TEST...
  • Page 49 0.81*(1+Rup/Rdown)=1.8V---Rup=10K, Rdown=8.2K Vcc3.3for MST9E19A analog AMS1117-3.3 AMS1117-3.3 5Vstb Vcc1.2 for MST9E19B R25 10K R25 10K +3.3Vstb 5Vstb BLM31PG121SN1 BLM31PG121SN1 3.3uH 3.3uH AOZ1041 AOZ1041 0.1uF 0.1uF 47uF/16V 47uF/16V 0.1uF 0.1uF 47uF/16V 47uF/16V VDDC PGND AGND COMP CA10 CA10 3.9K 3.9K +3.3AVDD for +3.3AVDD for 0.1uF 0.1uF...
  • Page 50 VDDP Location Near IC Pin. Location Near IC Pin. Location Near IC Pin. AMP-Rout AMP-R AUOutR3 AUOut3-R AUOutR2 AUOut2-R AMP-R AUOut3-R AUOut2-R VDDP BAV99 BAV99 CA13 CA13 47uF/16V 47uF/16V RP10 RP10 10nF 10nF 10nF 10nF 3906 3906 D100 D100 RP4.7KX4 RP4.7KX4 SYS_RST RP4.7KX4...
  • Page 51 HDMI1-RX2+ RX1_2+ DATA2+ HDMI1-RX2- RX1_2- DATA2 SHIELD AVDD_HDMI HDMI1-RX1+ RX1_1+ DATA2- HDMI1-RX1- RX1_1- GND1 DATA1+ HDMI1-RX0+ RX1_0+ DATA1 SHIELD HDMI1-RX0- RX1_0- GND2 DAT1A- C994 C994 C995 C995 C996 C996 C997 C997 C998 C998 C999 C999 C1000 C1000 C1001 C1001 C1002 C1002 HDMI1-RXC+ RX1_C+...
  • Page 52 PC-L PC-Lin PC-Lin R400 R400 PC-R PC-Rin PC-Rin D106 D106 D107 D107 R401 R401 C260 C260 R402 R402 C259 C259 R398 R398 INPAQ_VPORT INPAQ_VPORT 560pF 560pF 560pF 560pF VGA/5V EARPHONE INPUT EARPHONE INPUT INPAQ_VPORT INPAQ_VPORT R108 R108 C170 10u C170 10u VGA-B+ VGA_BIN C169 10u...
  • Page 53 SCART_VOUT SCART_VOUT SCART_VOUT SCART_VOUT SCART_VOUT SCART_VOUT SCART_VOUT SCART_VOUT SCART_VOUT SCART_VOUT D105 D105 SCART_VOUT INPAQ_VPORT INPAQ_VPORT Scart1_Lout C202 C202 2.2uF 2.2uF 5VPI Scart1_L HDTV Input PC Audio Input Scart1_Rout C201 C201 2.2uF 2.2uF Scart1_R R206 R206 D104 D104 D103 D103 HD-R HD-Rin HD_Rin R283...
  • Page 54 U23 PIN2 connected to PIN1 B/G,DK,I,L U23 PIN2 connected to GND L' I2C ADDRESS(R263 NC): +5VA READ is 0X87 +5VA R219 R219 R220 R220 R221 R221 WRITE is 0X86 4.7K 4.7K R222 R222 R223 R223 4.7K 4.7K 4.7K 4.7K C133 C133 IF_TV 1N4148...
  • Page 55 12VB +12V_ALL C344 C344 C817 C817 R668 R668 10uF 10uF 0.1uF 0.1uF 4.7k 4.7k Scart1_L R669 R669 Scart1_L R670 R670 NC/HOLE-V8 NC/HOLE-V8 R671 R671 C279 2.2uF C279 2.2uF AUOut2-L AUOut2-L 3904 3904 R672 R672 R673 R673 8.2k 8.2k R674 R674 NC/HOLE-V8 NC/HOLE-V8 4.7k...
  • Page 56 FOR TDA1308/PT2308 L26 FB,R298 NC; FOR TL062 L26 NC,R298 0; +5VA +12V_all 6VBuf1 R298 R298 CA40 CA40 R413 R413 C178 C178 10uF/16V 10uF/16V AMP-PPLout 2.2uF 2.2uF AMP-Lout+ AMP-Lout+ 2IN+ 2OUT+ R273 R273 R422 R422 C179 C179 AMP-PPRout C181 C181 2.2uF 2.2uF 1IN+ OP_VCC1...

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