XOCECO LC-42HW36 Service Manual
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XOCECO LC-42HW36 Service Manual

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LCD TELEVISION
LC-42/47HW36

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Summary of Contents for XOCECO LC-42HW36

  • Page 1 LCD TELEVISION LC-42/47HW36...

  • Page 2: Table Of Contents

    CONTENTS Safety precautions………………………………………………………………………..… Alignment instructions …………………………….…….………………………………… Method of software upgrading…………………………………………………………….. Working principle analysis of the unit……………………………….………….…………. Block diagram…………………………………..………………………………….………… IC block diagram………………………………………………………………………..…… Wiring diagram ……………………………………………………………………………. Troubleshooting guide ………………………………………………………………..…… Schematic diagram………………………………………………………………………… APPENDIX-A: Assembly list APPENDIX-B: Exploded View...

  • Page 3: Safety Precautions

    Note: This maintenance manual is intended only for the reference of the maintenance people. Please pay attention to the following points before carrying out the maintenance work. Safety precautions 1. Instructions Be sure to switch off the power supply before replacing or welding any components or inserting/plugging in connection wire Anti static measures to be taken (throughout the entire production process!): a) Do not touch here and there by hand at will;...
  • Page 4 would be unable to work and no way to get it repaired. If the connection wires, connections or components fixed by the thermotropic glue need to disengage when service, please soak the thermotropic glue into the alcohol and then pull them out in case of dagmage.

  • Page 5: Alignment Instructions

    Alignment instructions 1. Alignment equipment PM5515 (video signal generator) VG-848/VG-849 (YUV, VGA, DVI/HDMI signal generator) CA210 (white balancer) 2. Alignment flow-chart The alignment flow-chart is shown as fig-1 Check if DDC and FLASH are flash written To produce digital board and analog board All testing White balance adjustment Connect with central signal source, then check each function of TV such as...
  • Page 6 to adjust the value, press “MENU” button to exit the factory menu. If the unit does not turn off, you can press the “SLEEP” button to enter factory menu again. Turn off the unit to exit the factory menu. 3.2 EEPROM initialization Enter page one of the factory menu, select the EEPROM INITIALIZE to ON, turn off the unit then turn on again.
  • Page 7 37.5 HDTV 720p 33.75 HDTV 1080i 56.25 HDTV 1080P 4.4 VGA terminal Input the VGA signal (VG-848 signal generator), separate input VGA format signal of table 2, check if the image and sound is normal. If the image is deflection of the H-field, select auto sync correction of the SCREEN menu.
  • Page 8 ShowLogo Hotel Mode Direct Power On Channel switch blank Preset Programs Note: Back Light, Hotel Mode, Direct Power On have no function temporarily. Table4 Factory Audio Setting Item Setting Volume 1 Volume 25 Volume 50 Volume 75 Volume 100 Prescale_TV Prescale_Others Prescale_HDMI AIS_ADC_GAIN...
  • Page 9 Hue Min Hue Mid Hue Max Table6 White Balance Adjust Item CVBS D-SUB YPbPr HDMI R Offset G Offset B Offset R Gain G Gain B Gain Color Temperature Standard R Offset G Offset B Offset R Gain G Gain B Gain Color Temperature Cold...
  • Page 10 Sharpness YPbPr Dynamic Standard Mild Custom Contrast Brightness Colour Tint Sharpness HDMI Dynamic Standard Mild Custom Contrast Brightness Colour Tint Sharpness Note: You can set the value of the picture and sound mode at the factory menu. In other situation, the changed value will be store in Custom mode.

  • Page 11: Method Of Software Upgrading

    Method of software upgrading 1. Software install instrument a) Double click “PXSDKToolkitV1.0.5” to install the upgrade flat. b) Execute “ISPWriter3.exe” to enter IAP program. 2. Instrument Upgrade board (667.42HW36-90), USB wire (one male terminal and one mini terminal), VGA cable(665.D0002-510 with pin4 and pin11). 3.
  • Page 12 c) The upgrade is over when appear “ISP OVERFLOW”, click “Reboot” of the tool bar to start-up the unit, then the upgrade is complete. Reboot 4. Upgrade method when the unit can’t power on normally. Click “ISPWRITER3” icon on the desk to open the upgrade software, click “OPEN” on the tool bar to begin communication, then click “DIAL”...

  • Page 13: Working Principle Analysis Of The Unit

    Working principle analysis of the unit 1. Analog signal Antenna reception signal RF will be sent to integrative tuner (contain HF and IF amplifier circuit), the tuner is controlled by the command (SDA and SCL) of the MCU N801(M16C), select appropriate channel to system switch, via HF amplifier and IF amplifier decode, output video signal CVBS and second sound signal SIF.

  • Page 14: Block Diagram

    Block diagram...

  • Page 15: Ic Block Diagram

    IC block diagram 1. DPTV-SVP-WX68 32bit 256MHz Video signal from TUNER1, AV, RGB signal, Y and C signal, YUV, YPbPr signal via matched resistance, the signal separately through alone channel send to main IC NS01(SVP-WX68) video switch, A/D transition, digital decode, image scale and OSD superposition, then send to LVDS level drive for LCD screen.
  • Page 16 2. SGTV58xy Audio signals and SIF are sent to N103(SGTV58xy) for stereo decode and AVC. SGTV58xy has ten input channels for analog audio, audio of AV1. AV2 (AV1 and S-Video share the same audio channel),YPbPr1, YPbPr2, D-SUB/DVI, USB/PVR are sent to N103, the signals are switched inside the IC by the control of the software, the selected audio output through three ways.
  • Page 17 3. TPA3120 The TPA3120 is a 25-W stereo class-D audio power amplifier. Description Description Standby control signal input 17, 18 Gain select for audio output Mute signal input 15, 22 Audio output for left/right channel 5, 6 Audio input for left/right channel 13, 14 Power ground 8, 9...
  • Page 18 4. USB mode To printer AML7213 The AML7213 is an integrated system for multi-audio/video decoding, witch supports MPEG-1, MPEG-2, MPEG-4 format. It has dual USB2.0 high-speed OTG ports that connect to digital camera, MP3 player and other electric device. The AML7213 receives IR signal and supports YPbPr720P output and is used for CRT, LCD, PDP, portable media players, etc.
  • Page 19 Pin description: INPUT: PIN162 DP2 D+ signal input of USB2 PIN163 DM2 D- signal input of USB2 PIN173 DP1 D+ signal input of USB1 PIN174 DM1 D+ signal input of USB1 PIN189 IR input OUTPUT: PIN9 PIN12 PIN15 PIN197 / PIN200 / PIN201 / PIN202 I2S audio output to NU8(CS4334) OTHERS: PIN51 / PIN52...
  • Page 20 Check the back level N1 is abnormal, replace it circuit of IC output when the power supply is normal (short or joint soldering) (2) picture and operation are normal, but sound is abnormal: Check if NU8 5# 8# Check if NU8 Check output sound signal power supply...
  • Page 21 on, it makes all the IC working and output voltage. L1653:PFC( power factor correct) TEA1610T: Isolation D/D convert (400VDC converted to DC 24V, 18V, etc.) FSDH321: Isolation D/D convert (400VDC converted to DC 5V, 32V, etc.) FSDH321 block diagram is bellow:...
  • Page 22 L6563 block diagram is below:...
  • Page 24 TEA1610T block diagram is below:...

  • Page 25: Wiring Diagram

    power board backlight power main board power for digital circuit backlight USB module backlight touch key IR key control power power power board backlight control video video speaker port real-time clock video interface power board amplifier power adjust sensor main board audio side key board (option) audio...

  • Page 26: Troubleshooting Guide

    Trouble shooting guide Power on Check power board, IR board, power manage A red indicator IC N601(P89LPC915) and power cord lights? Yes, turn the unit on Check if CPU 42#, FLASH 26# is square wave? Check the peripheral circuit of CPU A blue indicator and FLSH/EEPROM.
  • Page 27 1.No raster, no picture, no sound No raster, no picture, no sound. Check if the power supply indicator light is on? Check standby Indicator is on Indicator is off Check if the indicator is 3.3V blue? Normal Abnormal Cut off the connection between power board Check power...
  • Page 28 Note: when check N801(CPU) pin10 is low voltage, you may disconnect R616 and test if V603 collector output low voltage first, then output high voltage all the while (the low voltage is CPU reset signal, it turns to high voltage when working normally), if not, it’s power manage IC problem. Is there square wave in FLASH pin26? If not, disconnect R851 and test if the square wave output from N806 pin3, if still not, check N801 pin46-48 and N806.
  • Page 29 3. With sound but no picture (has backlight) With sound and raster Check if LVDS power supply is normal? Normal Abnormal Check if the signal output form Check if pin 2,4 NS01 to XS01 is normal is low voltage? Abnormal Normal Check N402 LVDS...
  • Page 30 5. A certain channel is abnormal 5.1 No picture on AV1 Check if the CS10 has the signal input. Check periphery circuit of NS01, The path from AV1 terminal crystal and power supply to NS01 has problem 5.2 No picture on S-terminal Check if the CS10 and CS16 input the signal.
  • Page 31 5.4 No picture of YPBPR 1/2 Check if the CS04, CS05 and CS06 have the signal input Check peripheral Check if the pin4, pin7 circuit of NS01, crystal and pin9 of NB05 have and power supply signal output Check channel Check if the pin2, 5, 11/3, 6, 10 between NB05 and NS0l of N507 have signal input...
  • Page 32 5.6 No picture of HDMI Check if NA04 has digital signal output Check if NA04 has digital Check the peripheral circuit of signal input NS01, crystal and power supply Check the circuit between Check the peripheral circuit of NA04 (IIC, HOTPLUG and HDMI socket and NA04 NA04 pin21-23 HDMI channel switch control signal) Note: in order to display HDMI picture properly (especially when use the DVD with HDCP information),...
  • Page 33 6. Trouble diagnosis of power No power Check if C539 Check N503 has 5V Check if C533 Check N501 and its periphery (include has voltage over transformer and the secondary sample 100V feedback circuit. Check fore circuit of fuse and rectifier.
  • Page 48 APPENDIX-A: Main assembly 9242HW3614 MAIN COMPONENT AND IT'S NO. NAME NS01 SVP-WX68 (5270068001) Main board 6HW0090110 N103 SGTV5830 (5275830002) N106 TPA3120 (5273120001) USB card reader 6LR0381610 AML7213 (5277213001) Touch key board 6HW0010510 IR board 6HW0020910 Interface connection board 6HW00229R0 Side connection board 6HW0032910 Side AV board 6LY0162910...
  • Page 49 APPENDIX: Exploded view (LC-42X36)
  • Page 50 PART LIST OF EXPLODED VIEW DESCRIPTION front cabinet light conducting cloumn fixed board (upper) fixed board (left) panel front cabinet connection front cabinet connection panel connection panel fixed bracket wall mounting fixed bracket wall mounting fixed bracket stand connection power board main board frame high frequency board main board...

  • Page 51: Appendix-B: Exploded View

    APPENDIX-B: Exploded view (LC-47X36)
  • Page 52 PART LIST OF EXPLODED VIEW DESCRIPTION decorative bar speaker decorative bar front cabinet front cabinet fixed bar (right) front cabinet fixed bar (down) side AV boarod speaker IR board panel fixed bracket (right) fixed bracket power board bracket panel fixed bracket (middle) panel panel fixed bracket (down) column bracket...
  • Page 53 9242HW3614 Ver.1.0...

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Lc-47hw36

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