英华家电维修资料专用 QQ: LCD TV ENVISION L26W661 Service Service Service Horizontal Frequency khz TABLE OF CONTENTS Description Page Descripti

Description
Service Service Service Horizontal Frequency -0 khz TABLE OF CONTENTS Description Page Description Page Table Of Contents Important Safety Notice Revision List General Specification

Please download to get full document.

View again

of 48
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Information
Category:

Bills

Publish on:

Views: 2 | Pages: 48

Extension: PDF | Download: 0

Share
Transcript
Service Service Service Horizontal Frequency -0 khz TABLE OF CONTENTS Description Page Description Page Table Of Contents Important Safety Notice Revision List General Specification Operating Instructions The Use Of Remote Control To Use The Menu How To Connect Front Panel Control Knobs..... Input/Output Specification Mechanical Instructions.... Repair Flow Chart PCB Layout Main Board Power Board Key Board IR Board Audio Board White-Balance, Luminance Adjustment.... Block Diagram Schematic Main Board Power Board Key Board Audio Board Exploded View BOM List.... Different Parts List.. SAFETY NOTICE ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES. CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended. It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in order to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the equipment will be jeopardized by the service method selected. Hereafter throughout this manual, AOC Company will be referred to as AOC. WARNING Use of substitute replacement parts, which do not have the same, specified safety characteristics might create shock, fire, or other hazards. Under no circumstances should the original design be modified or altered without written permission from AOC. AOC assumes no liability, express or implied, arising out of any unauthorized modification of design. Servicer assumes all liability. FOR PRODUCTS CONTAINING LASER: DANGER-Invisible laser radiations when open AVOID DIRECT EXPOSURE TO BEAM. CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. CAUTION -The use of optical instruments with this product will increase eye hazard. TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS SERVICE MANUAL. Take care during handling the LCD module with backlight unit -Must mount the module using mounting holes arranged in four corners. -Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen. -Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the panel. -Protect the module from the ESD as it may damage the electronic circuit (C-MOS). -Make certain that treatment person s body is grounded through wristband. -Do not leave the module in high temperature and in areas of high humidity for a long time. -Avoid contact with water as it may a short circuit within the module. -If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may damage the panel.) Revision List Version Release Date Revision Instructions TPV Model A00 Feb.--00 Initial Release EMZNKWAENN A0 May Add new BOM EMZNKWANN . General Specification Items Specification Panel Type V0B-L0 C NH panel Driving system TFT-LCD CMO Panel Aspect Ratio :9 Resolutions x LCD Panel Brightness 00 cd/ m Contrast 00: Pixel Pitch 0.0mm x0.mm Display colors. million TV Function Video Inputs Audio Output OSD language Wall Mount Power Environment Color Temperature Cool / Warm/normal TV Standard ATSC, NTSC,-VSB,Clear-QAM Color systems ATSC, NTSC Closed Caption / V-chip For USA AV RCA x Audio L/R x S-Video S-Video x Audio L/R x COMPONENT Y,Cb,Cr x Audio channel L / Rx HDMI 0p,00i,0p,0i Audio Output: L / R Speaker (built-in): Two 0W speakers Headphone Mini-jack for stereo (.ø) English, etc VESA 00 mm x 00 mm Power Supply AC00V~0V, 0/0Hz Power Consumption 0W Standby W Operating + 0 C ~ + 0 C Storage - C ~ + 0 C Operating 0% ~ % . Operating Instructions. The Use of Remote Control POWER Press to power ON/OFF (standby) TV.(Note:.TV is never completely power off unless physically unplugged..press to turn on TV after the power on status LED had changed to the amber color and stopped flashing. ) VIDEO Press repeatedly to choose S-Video/ Composite source mode (Video ~ ). COMP Press repeatedly to choose Component source mode (Video ~ ). PC Press repeatedly to choose VGA or HDMI source mode (Video ~ 9). TV Press to choose ATSC/NTSC TV source mode. 0 ~ 9 /- number Press to enter TV channel number to select channel (Press - to indicate choosing the sub-channel). SLEEP Press to set a time period (off/0min/0min/90min)after which the TV should switch itself to standby mode. FREEZE Press to freeze the displayed picture VOL- / VOL+ Press + or - to adjust the volume. MENU Press to open or exit menu.,, , , OK Press to adjust the various function items on the menu. DISPLAY Press to show the information about the input source TV channel display resolution and current time. MUTE Press to set TVsound mute ON/OFF PREV CH Press to display the previous TV. MTS/SAP Press to activate the NTSC TV sounds, such as: Stereo, SAP or Mono tone. WIDE Press to choose the display aspect as: Normal, Wide, Zoom or Cinema mode. SOURCE Press repeatedly to choose the various input sources (Video ~ 9). CH-/ CH + Press + or - to browse through the TV channels. Exit Press to exit menu or OSD. VIDEO ADJ Press to choose the Brightness or Contrast adjustment. AUDIO ADJ Press to switch the ATSC multi-channel TV sounds. CC Press repeatedly to change cc on/cc off/cc on when mute EPG Press to show the information the same as DISPLAY key. FAV Press to turn on/off favorite mode (use CH up and down to change after setting the favorite TV channel on main menu). V-CHIP Press to lock / unlock Parental Control temporarily. (After setting the restricted table of MPAA or TV Rating.) . To Use the Menu. Press the MENU button to display the main menu. Use the cursor up/down to select a menu item.. Use the cursor left/right to enter a submenu.. Press the OK button to enable/disable the function.. Press the MENU or EXIT button to exit the menu. MAIN MENU The Setup menu in TV mode shows as below. In others source modes, the Setup menu only shows Menu Language and Aspect Ratio items.. Tuning Band: Select TV source signal from the Air (antenna) or Cable (CATV).. DTV Signal: Show the intensity of the received DTV signal.. Auto Ch Search: Automatically scan all NTSC / ATSC TV channels and then store in the channel table. In channel scan process, the OSD can display the number of channels which had been found.. Add on Ch search: Add channels which are new found.. Manual Channel Set: Show the channel setup table. User can choose to display the ATSC or NTSC TV channels and then edit (add/delete) the channel numbers.. Channel Labels: Show the NTSC / ATSC TV channel label menu for user modifying channel labels specifically.. Menu Language: Select the menu display language. (English / Espanol / Francais). Aspect Ratio: Select the display aspect ratio. (Normal/Zoom/Wide/Cinema) 9. Favorite Channel Mode: When favorite channel mode on user can edit favorite channel table in favorite channel set option. VIDEO MENU The Video menu in most source modes shows as below. It provides several video adjustment items for user fine tuning the video display. Only in VGA source modes, the Video menu simply provides Contrast, Brightness, Back light and Settings (Preset) items. . Contrast: Video contrast adjustment, the tuning range is 0 ~ 00.. Brightness: Video brightness adjustment, the tuning range is 0 ~ 00.. Sharpness: Video sharpness adjustment, the tuning range is -0 ~ 0.. Color: Video color chroma adjustment, the tuning range is 0 ~ 00.. Tint: Video tint adjustment, the tuning range is R0 ~ G0.. BackLight: Backlight strength adjustment, the tuning range is 0 ~ 0.. Settings: Restore the default video settings. AUDIO MENU The Audio menu in TV mode shows as below. It provides audio adjustment for user to modify the audio setting. Except in ATSC TV mode, some audio adjustment items for user to modify the audio setting. Excepting in ATSC TV mode, the Audio Language option is disable in others source modes. The audio language setting is only available in ATSC TV source. Furthermore, the Bass and Treble tuning items are only enabled while the SRS option set Off (tune-off the SRS sound effect). The Default states of Bass and Treble items are enabled as well as SRS option set Off.. Audio Language: Change the audio language setting on ATSC TV programs the number of the supported audio languages depends on the ATSC TV programs.. Bass: Bass tone adjustment, the tuning range is 0 ~. (The default state is enabled). Treble: Treble tone adjustment, the tuning range is 0 ~. (The default state is enabled). Balance: Audio balance adjustment, the tuning range is L ~ R.) . Digital Audio Output: Digital audio output format selection, user can choose RAW (default) or PCM format or off.. TV Speaker: Choose to turn on / off the TV internal speaker. The digital audio output signals earphone output signals will not be turn-off even though the TV speaker is off. The default setting is on.. Settings: Restore the default audio settings. FEATURE MENU The Feature menu in TV mode shows as below. It provides certain optional control functions such as time set, sleep timer, video noise reduction, parental control (V-chip) and close caption style setting. This menu gives users the most flexibilities to satisfy their generally demands. According to the various requirements in different source modes, certain features should be hidden (disable) on the menu. The details footnotes will be described clearly below.. Time Set: Set current time. This sub-menu includes Time Zone and Time items. Time Zone item provides user to set current time zone, such as: Pacific Alaska Hawaii Eastern Central and Mountain. Time item provides user to set the time clock.. Sleep Timer: Enable or disable the TV standby timer. User can set the TV standby timer as off / min / 0 min / min/ 0 min / min / 0 min/ 90 min / 0 min / 0min/ 0min. Timer starts to count down after cursor leaving the sub-menu. (At the moment, the item shows ** min Left and the cursor highlights on the Feature icon.). Advanced Video Menu: Provide the Noise Reduction Color Temperature and D Y/C. for enhancing video quality. Noise Reduction gives four NR effect degrees, such as: Low Mid High and Off. The default setting is off. Colour Temp gives three color temperature modes as: Normal Warm and Cool. The default mode is Warm. D Y/C provides On / Off switches. The default setting is On. Setting restores the default advanced video option settings.. Password Set: Change the -numeral parental control password. Three steps are required for changing the password: Enter Old Password - Enter New Password - Confirm New Password. Note: This item is only available in TV, Composite and S-Video source modes. The default password is Parental Control: provide the parental Control (V-chip) function setting. Before entering the Parental Control sub-menu, user has to key in the password first. Then enter the Parental Lock item, User can modify the restricted table about MPAA or TV Rating respectively. While exiting the sub-menu, the parental control function is working. The inhibitive channels or source signals can be un-lock through pressing the V-CHIP key on the remote control and then key in the correct password. Note: This feature is only available in TV, Composite and S-Video source modes. (The default password is: ) 9 . Digital Captions: Select the close caption options ( Service -, Text - and CC -) in digital TV mode. When select service to service you can modulate parameters in the Digital Close Caption.. Digital Close Caption: Provide numerous options for setting the digital close caption style. In the sub-menu. Style item can be set as Automatic or Custom mode. If Custom mode is selected, user can modify the detail styles described below. The setting result will be shown immediately on the bottom side of the sub-menu OSD. Note: This feature is only available in Digital TV (ATSC) mode. Size : Digital close caption font size, which can be set as Small Normal or Large. Font : Digital close caption font style, which can be chosen as Default or Font ~. Text Color : Giving Red / Green / Blue/ Yellow / Magenta / Cyan / Black / White Colors. Text Opacity : Giving Transparent / Translucent / Solid / Flashing modes. Background Color : Giving Red / Green / Blue / Yellow / Magenta / Cyan / Black / White Colors. Background Opacity : Giving Transparent / Translucent / Solid / Flashing modes. Edge Effect : The text edge effects, which gives None / Raised / Depressed / Uniform / Left Shadow / Right Shadow modes. 0 Edge Color : The colors of text edge effects, which provides Red / Green / Blue / Yellow / Magenta / Cyan / Black / White Colors.. Component Set: This option only shows and is available in component mode, which provides fine tuning component display, such as: H-Position V-Position, Phase.All these items are giving the tuning range from 0 to 00. Setting item provides the default component setting values restoring. 9. VGA Set: This option only shows and is available in VGA mode, which provides several items for the VGA display fine tuning, such as : H-Position V-Position Clock and Phase. All these items giving the tuning range from 0 to 00. Setting item provides the default VGA setting values restoring. . How to Connect . Front Panel Control Knobs . Input/Output Specification. RGB Signal input - Pin Color Display Signal Cable Pin No. Description Pin No. Description Red Video 9 Mandatory +V Supply for PC Bypass Green Video 0 Sync Ground Blue Video SDA(Remote Control) SCL(Remote Control) Bi-directional Data (SDA) for PC Bypass Ground H-Sync. Red Video Ground V-Sync. Green Video Ground Data Clock (SCL) for PC Bypass Blue Video Ground. HDMI Digital connector pin assignments Pin No. Description Pin No. Description TMDS Data+ TMDS Data Shield TMDS Data- TMDS Data+ TMDS Data Shield TMDS Data- TMDS Data0+ TMDS Data0 Shield 9 TMDS Data0-0 TMDS Clock+ TMDS Clock Shield TMDS Clock- CEC SCL SDA DDC/CEC Ground +V Power 9 Hot Plug Detect . AV/S-Video/Component Video Inputs AV (Composite Video input) Video System NTSC Amplitude.0 V (p-p), negative sync. Impedance ohm terminated S-Video (Y / C input) S-Video Component (Y, Pb/Cb, Pr/Cr input) Video System Y signal amplitude C signal amplitude Impedance System Y signal amplitude Cr, (R-Y) / Cb, (B-Y) Signal amplitude Impedance NTSC.0Vpp (including sync) 0.Vpp ohm terminated 00i, 0p, 0p, 0i.0Vpp (including sync) ±0.Vpp, ohm ohm terminated. Compatible Mode Table Mode Resolution Total VGA SVGA XGA VESA MODES Horizontal Nominal Frequency (KHz) Sync Polarity Nominal Freq. (Hz) Vertical Sync Polarit y Nominal Pixel Clock (MHz) 00 x.9 N 9.90 N. x 0. N.09 N.00 0 x 00. N N.00 0 x. P. P x.9 P 0. P x.09 P. P x. P P 9. x0. N 0.00 N.000 x0. N 0.09 N.000 x P.09 P. WXGA 9x9. P 0.0 P. . Mechanical Instructions. Put the TV on a soft flat; remove the screws to remove the base.. Remove the screws to remove the rear cover.. Remove the shield and BKT. . Remove the main board, connector board and power board. . Remove the screws on the main frame.. Remove the speaker and key board to remove the bezel. 9 0 . Repair Flow Chart. No Power (No LED indicator) Check power cord and board interface OK NG Plug in power cord and interface Check F90, BD90, C90 NR90 OK NG Check, Q90 IC90 NG Replace F90 BD90 C90 NR90 Replace Q90 IC90 OK Check D90, D9, IC90, Q90 ZD90 OK Check Q90 IC90 D99 D90 D90 L90 R9 NG NG Replace D90, D9, IC90, Q90 ZD90 Replace Q90 IC90 D99 D90 D90 L90 R9 OK Check IC90,Q90 NG Replace IC90,Q90 OK Check D9,D9,D9,IC90 NG Replace D9,D9,D9,IC90. Can not start (LED indicator yellow) Check key board NG Repair the key board OK Check V SB NG Return to OK Check PWR ON signal NG Check U9, Q90, Q90 NG Replace U90 or Q90 or Q90 OK Check I C communication Check RELAY-SW signal NG Replace Q9, Q9 OK Check main board power supply part OK Check U0, U0 OK Check I C communication NG Replace U0 or U0 . Abnormal display Check the source OK Check signal filter circuit NG NG Reset source Replace the filter or inductance TV signal Check TV system setup OK OK Check TU0 NG Replace TU0 OK Check U0 NG Replace U0 NTSC, AV, Check U0 NG Replace U0 Component, PC signal Check U0 NG Replace U0 HDMI signal Check U, U NG Replace U, U OK Check U0 NG Replace U0 . No sound Check the source NG Reset source OK Check signal filter circuit NG Replace the filter or inductance Check Earphone jack NG Replace the Earphone jack SIF signal Check TV system setup OK OK Check TU0 NG Replace TU0 OK Check U0 NG Replace U0 AV, Component, PC signal Check U0,U0 Replace U0,U0 OK Check U0 Replace U0 Check U0 Replace U0 Check U0, U00 OK Check speaker NG NG Replace U0, U00 Replace speaker . Key Board OSD is unstable or not working Is Key Pad Board connecting normally? N Connect Key Pad Board Y Is Button Switch normally? N Replace Button Switch Y Is Key Pad Board Normally? N Replace Key Pad Board Y Check Main Board . PCB Layout. Main Board . Power Board 9 . Key Board. IR Board. Audio Board 0 . White Balance, Luminance Adjustment Approximately 0 minutes should be allowed for warm up before proceeding white balance adjustment. Please select channel 0 to adjust the white balance. Color Temp. Cold Normal Warm x 9 99 PC MODE y 0 9 Y x 9 99 AV MODE y 0 9 Y x 9 99 HDMI y 0 9 Y COMPONENT (0i/0p) x 9 99 y 0 9 Y Note: The tolerance of the color coordinates should be less than ± 0. How to setting MEM. channel you can reference to Chroma-0 user guide or simple use SC key and NEXT key to modify x, y, Y value and use ID key to modify the TEXT description. Following is the procedure to do white-balance adjust Note: Step of AV, HDMI, COMPONENT0i, COMPONENT0p mode adjustment is the same as PC mode, PC mode: Ⅰ. In the TV mode adjust volume to zero and press number key 9. It will achieve the factory mode. Select the item of White Balance and press right key to enter it. In the White Balance you can adjust items. - items is RO, GO, BO R, G, B Bias adjust. - items is RG, GG, BG R, G, B Gain adjust. item needn t adjust items is color temperature select: Cool, Normal, and Warm. Ⅱ. Bias (Low luminance) adjustment:. Set the raster pattern (Black pattern with 0 ) Input.. Adjust the brightness on OSD until chroma 0 measurement reach the lowest value. Ⅲ. Gain adjustment: A. Adjust Cold color-temperature:. Set the Contrast of OSD function to 0 and Adjust Brightness to chroma-0 Y 00 cd/m. Switch the chroma-0 to RGB-mode (with press MODE button). Switch the MEM. channel to Channel 0 (with up or down arrow on chroma-0). The LCD-indicator on chroma-0 will show x =9, y =0, Y 00cd/m. Adjust the item: RG, until chroma 0 indicator reached the value R=00. Adjust the item: GG, until chroma-0 indicator reached the value G=00. Adjust the item: BG, until chroma-0 indicator reached the value B=00. Repeat abov
Related Search
Similar documents
View more...
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks
SAVE OUR EARTH

We need your sign to support Project to invent "SMART AND CONTROLLABLE REFLECTIVE BALLOONS" to cover the Sun and Save Our Earth.

More details...

Sign Now!

We are very appreciated for your Prompt Action!

x