Supra LC-26HU26 Service Manual

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LCD TELEVISION

LC-(26-37)HU26S

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Summary of Contents for Supra LC-26HU26

Page 1 LCD TELEVISION LC-(26-37)HU26S...
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
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, 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. Test equipment PM5518 (video signal generator) VG-849 (VGA signal generator) CA210 (white balancer) 2 Alignment flow-chart The alignment flow-chart is shown as fig-1 Check DDC, HDCP KEY, FLASH and POWER control IC Combined test for general assembly Factory initialization setup IF channel voltage of TV and AGC voltage adjustment White balance adjustment...
Page 6 BACK LIGHT Adjust according different screen ALL COLOR 1: white balance of each channel auto offset based on the HDMI white balance 0: white balance of each channel adjust the offset base separately 0: no unit upgrade on the assembly line 1: unit upgrade on the assembly line NO STANDY 01: turn on;...
Page 7 4 Software upgrade When software upgrading please enter factory menu first, enter ISP of OPTION, set ISP to 1 and you can begin to upgrade. After upgrade finished, it needs to set ISP back to 0. If the picture can’t display when upgrading, it needs to web J1 of 01S board.
Page 8: Method Of Software Upgrading
Method of software upgrading 1. The tools and software demanded 1) Please confirm that PC has the software of ISP_TOOL and install the parallel interface drive program Port95nt. 2) ISP_TOOL icon is bellow: 3) One serial cable (25 pins) and one VGA cable (15 pins), the serial cable connects the PC and the upgrade instrument, the VGA cable connects the TV and the upgrade instrument.
Page 9 Note: if it appears error, check the connection wires and check if ISP item of the factory menu is set to 1, if not, please set it to 1. 4) After connection is done, it needs to read the Binary document. Press “Read” as shown below: 5) Search the document needed to write in the “Read”...
Page 10 Select 6) Select the document then the window will appear as shown below:...
Page 11 7) Press “Auto” to select the writing function. Select the items shown in the picture above: (a) Read File...
Page 12 (b) Program (c) Exit ISP (d) Erase Device (e) File Area 8) Press “Run” to begin the writing program, wait till the blue bar is complete. After writing, it will display OK: If there is error appeared (shown as below), press “Run” again to rewrite the program till it is success.
Page 13 Note1: keep the connection well and don’t cut off the power during the writing process. Note2: the writing speed can be adjusted as shown below. Select “Config” then adjust Speed BAR, the value is bigger the speed is faster. But it is easier to appear error when increase the speed, so it need to select a suitable speed according the PC.
Page 14: Working Principle Analysis Of The Unit
Working principle analysis of the unit The RF signal received by antenna will be sent to tuner TUN401, then IF signal will be obtained through high amplifier and mixed frequency, through pre-intermediate amplified by V408, then it will be sent to acoustic surface-wave Z407 to do IF filter and get better IF characteristics, then it will be sent to N404 (TDA4470) to do intermediate amplification, phase-locked loop VCO and synchronous wave detection to get video signal TV-V;...
Page 15: Block Diagram
Block diagram POWER MEG. ATMEG8L EDID EDID 24C02 24C02 HDMI FLASH HDTV SW. YPbPr PI5V330 (DTV) EEPROM LCD TV SCART1-RGB CONTROLLER SCART1-AV HDCP KEY SCART1-L/R AUDIO SW. MST9X88LD HEF4052 SCART2-L/R PANEL SCART2-Y SCART2-C Y/AV1 AUDIO AMP. MP7722 TUNER SPEAKER TV-V IF AMP TV-SIF TDA4470...
Page 16: Ic Block Diagram
IC block diagram 1. MST9E88L The MST9E88L is a high performance and fully integrated IC for multi-function LCD monitor/TV with resolutions up to SXGA/WXGA. It is configured with an integrated triple-ADC/PLL, an integrated DVI/HDCP/HDMI receiver, a multi-standard TV video and audio decoder, a video de-interlacer, a scaling engine, the MStarACE-3 color engine, an on-screen display controller, an 8-bit MCU and a built-in output panel interface.
Page 17 2. MP7722DF The MP7722 is a stereo 20W Class D Audio Amplifier. It is one of MPS’second generation of fully integrated audio amplifiers which dramatically reduces solution size by integrating the following: 180mΩ power MOSFETs Startup / Shutdown pop elimination Short circuit protection Mute / Standby The MP7722 utilizes a single ended output structure capable of delivering 2 x 20W into 4Ωspeakers.
Page 19 3. TDA4470 The TDA4470 is an integrated bipolar circuit for multi-standard video/sound IF(VIF/SIF) signal processing in TV/VCR and multimedia applications. The circuit processed all TV video IF signals with negative modulation (e.g., B/G standard), positive modulation (e.g., L standard) and the AM, FM/NICAM sound IF signals.
Page 21: Wiring Diagram
Wiring diagram...
Page 22 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 23 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 24: Troubleshooting Guide
2. Troubleshooting guide 2.1. No raster Turn-on power supply, check if the red indicator is light in the STANDBY? Check if PIN3(5V) of main Press POWER button in the board is normal? unit or sensor control and check the indicator. blue Check if the PIN12 of X301 in Check STANDBY circuit of...
Page 25 2.2. Raster, but no picture Check if the unit button Does display remote control menu in screen when operation? press menu button? Check channels have signal? HDMI/VGA/YPRPB Enter factory-menu, Which is no signal initialization EEPROM, of channels Replace then turn off the TV, main board turn on again, display Replace...
Page 26 2.3.no sound Check if PIN2, 8,13 and Check PIN3 18 voltage of N405 is PIN7 output wave of Check N405 and its normal? N405 periphery Check power supply Check PIN24 wave of Check NS4 and its N404 periphery Check N404 and its Check PIN11 wave of periphery TUNER401...
Page 27: Schematic Diagram
page 1 of 4...
Page 28 page 2 of 4...
Page 29 page 3of 4...
Page 30 page 4 of 4...
Page 31 interface connector...
Page 32 KEY board...
Page 33 IR receiver board...
Page 34 TV board...
Page 35 26" power 1...
Page 36 26" power 2...
Page 37 32" POWER...
Page 38 37" power...
Page 39 26" backlight...
Page 40 26" T-CON...
Page 41 26" power...
Page 42 APPENDIX-A: Main assembly 9226HU2623 MAIN COMPONENT AND IT'S NO. NAME N404 TDA4470MFL (5274470001) Analog board 6HU0495310 N405 MP7722DF (5277722001) Main board 6HU0700150 MST9E88L (5270988002) IR board 6LW01309A0 Interface board 6HU0112910 Key board 6HU0220510 T-CON board 6HU0122610 Backlight board 6HU0121410 Power board 6HU0122010 Remote control RC-Y35-0H...
Page 43 9232HU2623 MAIN COMPONENT AND IT'S NO. NAME N404 TDA4470MFL (5274470001) Analog board 6HU0495310 N405 MP7722DF (5277722001) Main board 6HU04901S0 MST9E88L (5270988002) IR board 6LW01309A0 Interface board 6HU0212910 Key board 6HU0220510 Power board 6HU0212010 Remote control 6010Y03509 RC-Y35-0H Panel LK315T3LZ54 5203325903 9237HU2613 NAME MAIN COMPONENT AND IT'S NO.
Page 44: Appendix-B: Exploded View
APPENDIX: Exploded view (LC-27X26)
Page 45 PART LIST OF EXPLODED VIEW (LC-27X26) NO. PART NO. DESCRIPTION 5QX26W009D Front cabinet Screen 58A0039100 LCD screen frame (top) 58A003930A LCD screen frame upright1 58A0039500 LCD screen connection bracket1 574018901B Power board frame 5740188010 Main board frame Power board assy CPU board assy 10 58A0039700 Wall mount connection piece...
Page 46 APPENDIX: Exploded view (LC-32X26)
Page 47 PART LIST OF EXPLODED VIEW (LC-32X26) NO. PART NO. DESCRIPTION 5QG26W0090 Front cover 6153042500 Trans-connecting bracket assy Screen reception board assy 58A0028800 Connecting bracket of screen(left right) Power board assy 58B0A24110/ 58B0024110 Main switch bracket 5830E96910 AV baffle (right) Trans-connecting board assy 58A0041700 crystal FRAME (bottom) 5830097010...
Page 48 9226HU2623 Ver.1.0...

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Lc-37hu26