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Dynex LC-22HV40 Service Manual

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Summary of Contents for Dynex LC-22HV40

  • Page 2: Table Of Contents

    CONTENTS Safety precautions………………………………………………………………………..… Alignment instructions …………………………….…….………………………………… Method of software upgrading…………………………………………………………….. Method of flash writing……………………………………………………………………… 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

    Attention: This service manual is only for service personnel to take reference with. Before servicing please read the following points carefully. 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, connectors 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 damage.

  • Page 5: Alignment Instructions

    Alignment instructions 1. Test equipment VG-848 (YPbPr, VGA signal generator) VG849 (HDMI signal generator) CA210 (white balancer) 2 Alignment flow-chart 2.1 power test Connect all boards according the wiring diagram and power on, test the voltage of XV04 and the data is shown in table1. Table1 voltage of XV04 pins 5, 6 7, 8...
  • Page 6 Input HDMI signal source and check the display, various functions (analog control) and H/V center. Preset ex-factory Check the accessories and pack Fig-1 adjustment flow-chart 3 Adjustment instruction 3.1 Unit adjustments 3.1.1 Connect all the boards according to wiring diagram, connect with power and observe the display.
  • Page 7 Gain Blue, Offset Red and Offset Blue till they are accord with the requirement. 3.2.3.2 DTV adjustment (same for HDMI) Select the 26 channel in AIR mode, enter the factory menu Color Temp, set Color Mode to Cool first, a 11-step gray scale picture will appear, fix Gain Green, adjust Gain Red, Gain Blue to let the color coordinate of the ninth level to be (285, 293);...
  • Page 8 Table2 YUV signal format Pixel clock pulse Resolution H-frequency (kHz) V-frequency (Hz) Remark frequency (MHz) 720x480i 15.734 59.94/60 13.5 480i 720x480p 31.469 59.94/60 27.00 480p 1280x720p 44.96 59.94 74.18 720p(59p) 1280x720p 45.00 60.00 74.25 720p(60p) 1920x1080i 33.75 59.94 74.25 1080i(59i) 1920x1080i 33.75 60.00...

  • Page 9: Method Of Software Upgrading

    The debug tool board one port connect your computer LPT, the other port connect to Dynex32LCD RS232. 3. Connect the Dynex to Power Socket. The Power LED will turn Red. You can update the software at TV Power on of TV Standby.
  • Page 10 5. Click the icon of Device (If not the first time to run this software we can skip step 5) Set the Device information as below...
  • Page 11 6. Click the icon of Connect 7. If cable connect is ok, you can get the follow picture. If failure please double check the cable connect and try again.
  • Page 12 8. Click the icon of Read Click the follow Icon of Read...
  • Page 13 Select the update software for Dynex Open Select Open Icon. Then will appear the follow picture.
  • Page 14 9. Click the Icon of Auto Then will appear the follow picture...
  • Page 15 Please click the Icon of Run, the software will be updated to Dynex. It will take about 10 minutes. 10. If update software is finished and OK, It will appear PASS. If error please retry the step from 2 to 9.

  • Page 16: Method Of Flash Writing

    11. Please disconnect the Dynex from Power Socket, untill the Power LED no light, then reconnect the Dynex to Power Socket and Power on the TV. Method of FLASH writing 1. Using ALL-100 1) Enter AUTO interface and select “Config”. Note: you must select “Config” when writing Flash.
  • Page 17 2. Use Mstar writing tool on line 1) Open the tool, press “Device” (1) Select WP Pin pull to high during ISP (2) Select New Setting Below (3) Select Status Register Bit2 Bit3 Bit4 Bit7 and the write-protect setting is finish 2) Make sure that the write-protect setting is correct...

  • Page 18: Working Principle Analysis Of The Unit

    Working principle analysis of the unit The analog and digital RF signal received by antenna will be sent to integrative tuner TUNER1(TD1636AF, contains HF and IF amplifier circuits), which selects appropriate channel and sends the selected IF signal to the next level by the control of SDA, SCL. The analog RF signal sent to tuner, via high amplify and mixed frequency to get IF signal VIF.

  • Page 19: Block Diagram

    Block diagram M61111 TUNER MSD809 S-VEDIO-Y/C Controller LVDS AV/S-VEDIO MSD119BL AUDIO L/R YPBPR AUDIO L/R AUDIO L/R 24LC02EDID software HDMI RS232 耳机 BH3547 Sound amplifier CS4344 R2A15117...

  • Page 20: Ic Block Diagram

    IC Block diagram 1. M61111FP The M61111FP is a semiconductor integrated circuit built-in the PLL inter-carrier method VIF/SIF dedicated to NTSC. The circuit includes the VIF amplifier, image waveform detection, APC detection, IF/RF, AGC, VCO, AFT, LOCK DET, EQ, AF amplifier, limitter, FM waveform detector circuits, and acts as a small tuner.
  • Page 21 2. MSD119BL The MSD119BL is a highly integrated ASIC for LCD/PDP DTV applications with resolutions up to 1080P. It is configured with an integrated triple-ADC/PLL, a multi-standard TV video and audio decoder, a motion adaptive video de-interlacer, a scaling engine, the MStarACE-3 color engine, an advanced 2D graphics engine, a transport processor, a high-definition (HD) MPEG video decoder, a 24-bit DSP for MPEG audio decoding, a DVI/HDCP/HDMI receiver, and a peripheral control unit providing a variety of HDTV control functions.
  • Page 23 3. MSD809 AGC Description The AGC has two modes of operation. When the chip is powered up, the non-coherent IF AGC & RF AGC will function first. The non-coherent AGC loop will provide the control voltage necessary for proper gain control of the external gain amplifier and tuner in the RF section. The two AGC will extend the dynamic range of power amplifier.
  • Page 26 4. R2A15117FP 　　R2A15117FP is a Digital Power Amplifier IC developed for TV. 　 R2A15117FP has a maximum power of 4W × 2ch. (VD=12V,THD+N=10%, SE) at a 4 Ω load. 　 It is possible to replace a conventional analog amplifier with a digital amplifier easily. GAIN1 GAIN2 Gen.
  • Page 27 29 28 26 25 PROT VREF CLOCK N.C. N.C. DVDD N.C. R2A15117FP N.C. N.C. N.C. N.C. AVCC ROSC N.C. CBIAS 10 11 Terminal name(In parentheses, pin number.) 　　 VD :VD1(4,5),VD2(32,33) :HB1(44),HB2(41) :DVDD(42) DVDD :GND(16),VS1(46,47),VS2 (38,39) :OUT1(1,2),OUT2(35,36) :AVCC(15) AVCC :STBYL(10),GAIN1(11),IN1(12),CBIAS(13),ROSC(14),CLOCK(22), 5V operation terminal VREF(23),PROT(24),IN2(25),GAIN2(26),MUTEL(27)

  • Page 28: Wiring Diagram

    Wiring diagram...
  • Page 29 Trouble shooting 1. Fault clearance Before servicing please check to find the possible causes of the troubles according to the table below. 1.1 Antenna (signal): Picture is out of focus or jumping Bad status in signal receiving Poor signal Check if there are failures with the electrical connector or the antenna.
  • Page 30 signal types. Picture too bright and there is Check if the contrast setting is too high. distortion in the brightest area Possibly the output quality of DVD broadcaster is set too high. It maybe also due to improper terminal connection of the video frequency signal in a certain position of the system.

  • Page 31: Troubleshooting Guide

    2. Troubleshooting guide 2.1 Panel doesn’t light Turn-on power supply, check if the red indicator is light in the STANDBY? Check if XV04 pin11 (5V) of Press POWER button in the main board is normal? unit or remote control and check the indicator.
  • Page 32 2.2 Backlight, but no picture Check if the unit button Does display remote control menu on screen when operation? press menu button? Check if the all channels have no signal? Enter factory-menu, Replace initialization EEPROM, main board Replace then turn off the TV, main board turn on again, display picture?
  • Page 33 2.3 Picture, but no sound(TV input) Check if PIN10,27 of Check PIN12 Replace NV10 NV10 is high-level? PIN25 wave of NV10 Check if DV2 positive Check PIN76 terminal is low-level Replace NC1 PIN77 wave of NC1 high Replace VV4 Replace NC1 Replace NV2 2.4 Picture, but no sound(channel except TV) Check if PIN4,32...

  • Page 34: Schematic Diagram

    Main board...
  • Page 35 Main board...
  • Page 36 Main board...
  • Page 37 Main board...
  • Page 38 IR & Key...
  • Page 39 Backlight board...
  • Page 40 Power board...
  • Page 41 APPENDIX-A: Main assembly 9222HV4010 MAIN COMPONENT AND IT'S NO. NAME MSD119CL （5270119002） M61111FP (5276111101) Main board 6HV0020110 NJ02 MSD809 (5270809003) NV10 R2A15117 (5271511701) IR board 6HV0240910 Key board 6HV0240510 Backlight board 6HK0021410 Power board 6HV0172010 Remote control RC-201-0B 6010200102 Panel CLAA220WA01 5203227201...

  • Page 42: Appendix-B: Exploded View

    APPENDIX-B: Exploded view (LC-22X40)
  • Page 43 PART LIST OF EXPLODED VIEW PART NO. DESCRIPTION 5Q22400010 front cabinet 5500504001 speaker 5700310000 light conducting column panel 5H2256J020 back cabinet 5810E64600 terminal baffle 572011201C power cord clasp IR board 6151144000 stand 5830113240 back cover backlight board power board main board key board 58B0038200 stand column...

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Dx-lcd22-09

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