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Olevia LT37HVS Service Manual

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See also: User Manual
DigiMedia
LCD TV For LT37HVS
Job Function
CPO
Project Manager
R&D Dept. Manager
EE Dept. Manager
ME Dept. Manager
Engineering Dept. Manager
Sales Dept. Manager
Quality Assurance Dept. Manager
Author

Service Manual

Doc. No.：
Version：1.0
Total Pages：39
Approvals
Signature
Date

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Summary of Contents for Olevia LT37HVS

  • Page 1: Service Manual

    DigiMedia Service Manual LCD TV For LT37HVS Doc. No.： Version：1.0 Total Pages：39 Approvals Job Function Signature Date Project Manager R&D Dept. Manager EE Dept. Manager ME Dept. Manager Engineering Dept. Manager Sales Dept. Manager Quality Assurance Dept. Manager Author...

  • Page 2: Table Of Contents

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 2/39 Table of Contents Introduction……..…………..……………………………………… P3 1.1 Preface……………………………..……………………………………………… P3 1.2 Caution…………………………………..…...…………………………………… P3 1.3 Warning…………………………………………..………………………………. P3 System Block Diagram…………………………………………….. P4 2.1 System Block Diagram…………………………………………………………… 2.2 Connector Connection Diagram…………………………………………………. 2.3 Connector Pin Definition………………………………………………………...

  • Page 3: Introduction

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 3/39 1. Introduction 1.1 Preface This service manual aims directly at the module of LCD TV. It offers the simple repair which emphasizes on technique explanation and production troubles to remove for the engineers and technicians who have electronic background.

  • Page 4: System Block Diagram

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 4/39 2. System Block Diagram 2.1 System block diagram DigiMedia...

  • Page 5: Connector Connection Diagram

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 5/39 2.2 Connector Connection Diagram DigiMedia...

  • Page 6: Connector Pin Definition

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 6/39 2.3 Connector Pin Definition SYSTEM BOARD Function: VGA Signal In port Connector type :D-Sub Specification: CNNT-HD D Sub-H-F-3Row-15pin-Dip-BLU Pin Definition Pin No. Pin Name Description VGAR 75 ohm termination, 0.7Vp-p red sig VGAG 75 ohm termination, 0.7Vp-p green s...
  • Page 7 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 7/39 RX0m TMDS LVDS input signal RXCp TMDS LVDS input signal RXCm TMDS LVDS input signal No connection No connection DDC_CLK I2C clock bus for Reading DDC data DDC_DATA...
  • Page 8 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 8/39 Function: Keypad In Connector type:M15-I20001 Specification: CNNT M 15PIN pitch 2.0mm DIP Straight WST(blue) Pin Definition Pin No. Pin Name Description LED_B1 Signal for Indicator LED LED_B1 Signal for Indicator LED...
  • Page 9 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 9/39 No connection No connection HD_PR HD_PR In HD_PB HD_PB In HD_Y HD_Y In SV_SEL1 S_Video_SEL ALO_SC2 Scart2 AUDIO_L CH out ARO_SC2 Scart2 AUDIO_R CH out ALO_SC1 Scart1 AUDIO_L CH out...
  • Page 10 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 10/39 IF_C S-VIDEO1_C In OCVBS_SC2 Scart2 cvbs out IF_CR YCBCR_CR IN IF_CB YCBCR_CB IN IF_Y YCBCR_Y IN DTV_PR DTV_ Pr In DTV_PB DTV_ Pb In DTV_Y DTV_ Y In...
  • Page 11 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 11/39 DTV_IR DTV_IR pin Function: LVDS output port Connector type: TD01-30R1 Specification: CNNT-LVDS-F SMD STRAIGHT-V-30 PIN-1.25mm Pin Definition Pin No. Pin Name Description No connection No connection No connection...
  • Page 12 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 12/39 +5.0V power supply Function: Power Input 1 Connector type:M15-I25002 CNNT M 15PIN pitch 2.5mm DIP straight Specification: Pin Definition Pin No. Pin Name Description +V5_SYS DC Power 5V IN...
  • Page 13 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 13/39 +12V DC Power 12V IN Function: Audio Out (R Channel) Connector type:M3-I25002 Specification: CNNT M 3PIN pitch 2.5mm DIP straight (red) Pin Definition Pin No. Pin Name Description...
  • Page 14 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 14/39 No connection No connection HD_PR HD_PR OUT HD_PB HD_PB OUT HD_Y HD_Y OUT SV_SEL1 S_Video_SEL ALO_SC2 Scart2 AUDIO_L CH IN ARO_SC2 Scart2 AUDIO_R CH IN ALO_SC1 Scart1 AUDIO_L CH IN...
  • Page 15 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 15/39 IF_C S-VIDEO1_C OUT OCVBS_SC2 Scart2 cvbs IN IF_CR YCBCR_CR OUT IF_CB YCBCR_CB OUT IF_Y YCBCR_Y OUT DTV_PR DTV_ Pr OUT DTV_PB DTV_ Pb OUT DTV_Y DTV_ Y OUT...
  • Page 16 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 16/39 DTV_IR DTV_IR pin Function: S-Video1 1/2 In Connector type: Mini Din Specification: CNNT F 12PIN Mini Din DIP Right Angle 12ψ AMP( 2 S-Video) Pin Definition Pin No.
  • Page 17 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 17/39 Function: Earphone Out Connector type: PHONE JACK Specification: CNNT-EAR Phone Jack-H-F-5pin-3.6ψ-Dip Pin Definition Pin No. Pin Name Description EAR_ROUT EAR Audio_R OUT TPA_MODE TPA_MODE EAR_LOUT EAR Audio_L OUT...
  • Page 18 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 18/39 Connector type: RCA Specification: CNNT-RCA*4 white&red / white&red Pin Definition Pin No. Pin Name Description COM1_AL Component1 Audio_L In COM1_AR Component1 Audio_R In COM2_AL Component2 Audio_L In COM2_AR...
  • Page 19 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 19/39 DTV_SPDIF DTV audio format DTV_Pb DTV_Pb In DTV_L Audio DTV L ch IN DTV_Pr DTV_Pr In DTV_R Audio DTV R ch IN DTV_DL DTV_DL pin DTV_IR DTV_IR pin...
  • Page 20 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 20/39 ALO_SC1 Scart1 AUDIO_L CH IN ARO_SC1 Scart1 AUDIO_R CH IN YCBCR_L YCBCR AUDIO_L CH IN YCBCR_R YCBCR AUDIO_R CH IN HDTV_L HDTV_L AUDIO_L CH IN HDTV_R HDTV_L AUDIO_R CH IN...
  • Page 21 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 21/39 TPA_MODE CHECK EARPHONE CONNECT OUT EPOUT_L Audio EARPHONE L CH IN EPOUT_R Audio EARPHONE R CH IN AMP_WF Audio Sub woofer IN LINE_L Audio Line L CH IN...
  • Page 22 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 22/39 No connection No connection No connection No connection HD_PR HD_PR In HD_PB HD_PB In HD_Y HD_Y In SV_SEL1 S_Video_SEL ALO_SC2 Scart2 AUDIO_L CH out ARO_SC2 Scart2 AUDIO_R CH out...
  • Page 23 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 23/39 RESETn RESET CVBS_SC1 CVBS1 IN IF_YCVBS S-VIDEO1_Y In IF_C S-VIDEO1_C In OCVBS_SC2 Scart2 cvbs out IF_CR YCBCR_CR IN IF_CB YCBCR_CB IN IF_Y YCBCR_Y IN DTV_PR DTV_ Pr In...
  • Page 24 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 24/39 DTV_R Audio DTV R ch in ADC1 A/D conver DTV_SPDIF DTV audio format ADC0 A/D conver DTV_IR DTV_IR pin Function: Power Input Connector type:M5-I25002 CNNT M 5PIN pitch 2.5mm DIP straight...
  • Page 25 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 25/39 LED_B1 Signal for Indicator LED LED_B1 Signal for Indicator LED LED_B1 Signal for Indicator LED IR Data Out KEY_Y3 Signal sent from Keypad to System 3 KEY_Y2 Signal sent from Keypad to System 2...

  • Page 26: Troubleshooting

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 26/39 3. Troubleshooting 3.1 No Power No Power Power plug is Check power plug is securely inserted securely inserted into the into the power power socket? socket. 1. Check power to system cable 2.Check system to keypad cable...

  • Page 27: No Sound

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 27/39 3.2 No Sound No Sound Please connection Check the speaker wire the speaker wire to connector to system system board. board? Confirm input Check the input source source and audio...

  • Page 28: No Source Input

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 28/39 3.3 No Source Input RGB or video source can’t be found Confirm input Check OSD select source and the correct? output of OSD select is correct. Check input source...

  • Page 29: Keypad Failed

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 29/39 3.4 Keypad Failed Keypad no response 1. Check the cable of keypad to system board. 2. Check keypad function. 3. If item 1 and 2 have no problem, please replace keypad board or system board.

  • Page 30: Ir Failed

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 30/39 3.5 IR Failed IR no response Reinstall F/W . Check F/W vision? Check remote control Change remote has energy? control battery. Check keypad board Please connection connection into system...

  • Page 31: Indicator Led Failed

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 31/39 3.6 Indicator LED Failed Indicator LED is not bright Please connection the Check the cable of cable of indicator board indicator board to keypad to keypad board. board?

  • Page 32: Firmware Upgrade Applications

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 32/39 4. Firmware upgrade applications Update Firmware tools： 1.PC(Notebook) 2. transmission line as Figure1 MtkTool.exe , COMPR.DLL , MTKDLL.DLL) 3.Sofeware( Figure1 Cable switch: on D side (refer Figure2) Figure2 Insert the power cord and RS232 cable.
  • Page 33 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 33/39 Click the Browse of “Load Bin file option” to choose the correct firmware. Click the bottom of Upgrade, System will start upgrade firmware, when it fished the operation, list form has to show the “Finished”...

  • Page 34: Disaggregate Graphic

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 34/39 5. Disaggregate Graphic 5.1 TV Box 1. Loosen 4 screws as blue circles. 2. Pull up the TV Box Cover as red arrow. 3. Pull up the TV Box out as blue arrow.

  • Page 35: Back Cover

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 35/39 5.3 Back Cover 1. Please finished step 5.1 and 5.2 first. 2. Loosen 19 screws as blue circles. 3. Pull up the Back Cover. DigiMedia...

  • Page 36: System Board

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 36/39 5.4 System Board Figure 4 Figure 3 Figure 1 Figure 5 Figure 2 1. Loosen 5 screws as blue circles of Figure 1 and take off the Wall Mount Bracket.

  • Page 37: Keypad Board

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 37/39 5.6 Keypad Board 1. Please loosen 6 screws as blue circles. 2. Take off all of connector as red circles. 5.7 Speaker 1. Please loosen 4 screws as blue circles.

  • Page 38: Power Module

    Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 5.8 Power Module and LCD Panel Module 1. Loosen 6 screws as blue circles. 2. Take apart the inverter connector as red circles. 1. Loosen 14 screws as blue circles.
  • Page 39 Doc No. Service Manual TITLE Version LCD TV For LT37HVS Page 39/39 1. Loosen 8 screws as blue circles, then can pick up LCD panel. DigiMedia...

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