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LCDTelevision
Service Manual
Chassis: MT5380
(1) --ELCHW261
Product Type: LHDN26W57US
Ver 1.0
Hisense Electric Co., Ltd.
August, 2009
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Contents Contents ....................................................................................................................................................................... - 2 - Service Manual ........................................................................................................................................................... - 3 - 1. Precautions and notices ........................................................................................................
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Service Manual 1. Precautions and notices READ THE SAFETY PRECAUTIONS IN BEFORE SERVICING THE LCD TV, THIS MANUAL• USE ONLY MANUFACTURER SPECIFIED REPLACEMENT PARTS WHEN SERVICING. USE OF NON-AUTHORIZED PARTS WILL VOID THE MANUFACTURE'S WARRANTY Proper service and repair is important to the safe, reliable operation of all Hisense Electric Co., Ltd Equipment. The service procedures recommended by Hisense and described in this Service Guide are effective methods of performing service operations. S
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techician trained in the proper Television safety and service methods and procedures Hereafter throughout this manual, Hisense Electric Co., Ltd will be referred to as Hisense. 1.1 Warning 1.1.1 Critical components having special safety characteristics are identified with a a_ by the Ref. No. in the parts list. Use of non-manufacturer's recommended parts may create shock, fire, or other hazards.Under no circumstances should the original design be modified or altered without written permission fr
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IMPORTANT: Always disconnect the power cord from AC outlet before replacing parts or modules. 1.1.3 To prevent electrical shock, use only a properly grounded 3 prong outlet or extension cord. 1.1.4 When replacement parts are required, be sure to use replacement parts specified by the manufacturer or have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, or other hazards and will void the manufacturer's warranty. 1.1.5 Safety regulations
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1.1.6 (1) Do not supply a voltage higher than that specified to this product. This may damage the product and may cause a fire. (2) Do not use this product: > High humidity areas > In an area where any water could enter or splash into the unit. High humidity and water could damage the product and cause fire. (3) If a foreign substance (such as water, metal, or liquid) gets inside the panel module, immediately turn off the power. Continuing to use the product may cause fire or electric shock. (4)
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or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over. 1.2 Notes Notes on Safe Handling of the LCD panel and during service The work procedures shown with the Note indication are important for ensuring the safety of the product and the servicing work. Be sure to follow these instructions. • Before starting the work, secure a sufficient working space. • At all times other than when adjusting and checking the product,
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sure to confirm that there is no foreign matter on top of the cushioning materials before the surface of the panel comes into contact with the cushioning materials. Failure to observe this precaution may result in, the surface of the panel being scratched by foreign matter. • Be sure to handle the circuit board by holding the large parts as the heat sink or transformer. Failure to observe this precaution may result in the occurrence of an abnormality in the soldered areas. • Do not stack the cir
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2. Product Function Specifications 2.1 Product Function Front Cabinet Input _l_tion Volume Up Volume Down Channel Up Channel Down Power(On/Stand by) _Remote reviver -9-
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Back Cabinet AC INPUT 2.2 Specifications -10-
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Appendix Model ELCHW261 26 Inches Diagonal display size Television system American TV standard ATSC/NTSC system Audio multiplex BTSC system VRF: 2_,13 UHF: 14_,59 CATV:lN125 Digital Terrestrial Broadcast (8VSB): 2_-_59 Channem coverage Digital cable (64/256 QAM): 1-,135 PC mode 640 x 480/50Hz,800 x 500/50Hz, 1024 x 768/50Hz 4801/50Hz,480P/50Hz,720Pi50Hz, lO80Z/50Hz YPbPr/YCbCr mode HDMI mode 4BOI/50Hz,480P/50HzJ20Pi50H% l O801/50Hz Resolution 1366 x 768 Power source AC 120 V, 60 Hz 75W Power con
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3. LCD Panel Spec Panel: M260TWRl\ROH SN 1061384 3.1 General Description The M260TWR1 is a color active matrix thin film transistor (TFT)liquid crystal display (LCD) that uses amorphous silicon TFT as a switching device. It is composed of a TFT LCD panel, a timing controller, voltage reference, common voltage, DC-DC converter, column driver; and row driver circuit. This TFT LCD has a 26-inch diagonally measured active display area with WXGA resolution (1366 vertical by 768 horizontal pixel array
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3.2 General Features Product Summary 26 Screen Diagonal Active Area 575J69 (H) x 323.712: (V)" Pixels H x V 1,366. (x3) x 768 Pixel Pitch mm 0.4215 (per one triiad)x: RG,B. Medical Stripe ...... Pixel Arrangement Disp_a_ Mode NormaililyWhite_ ii!!!i _I:!i!!ii:? White Luminance cd,m _ (CCFL@7mA) Contrast Ratio s00 _ .... ms@c Response Time v wa_ 36 typ]ca (Black pa_ern_ 60Hz) Logic Power Consumption watt typical (C,FL current 7mA) Boc ght Powe, 3_900 tS@ica/ 9 i_:i:ii2iih, iii{i;{" Outline Dime
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4. Chassis Layout and Overall Wiring Diagrams Boards and Chassis Layout No Description Part No. Type/Model PCB/Model (1) Main Board 121477 RSAG2.908.1553-2\ROH RSAG7.820.1730\VER.D\ROH (2) Power Board 122630 RSAG2.908.1498-2\ROH RSAG7.820.1646\VER.C\ROH (3) Keypad Board 113354 RSAG2.908.1088\ROH RSAG7.820.1101 \VER.B\ROH (4) IR Board 116295 RSAG2.908.1260-2\ROH RSAG7.820.1337\VER.B\ROH -13-
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5. Factory/Service OSD Menu and Adjustment 5.1 To enter the Factory OSD Menu a. With factory RC (remote control) 1. Press "M" button and enter factory mode. 2. Press "Menu" button and enter factory OSD menu. 3. Press "CH+"/"CH-" button select the function menu, press "VOL+"/"VOL-" enter the selected function menu. Press "VOL+"/"VOL-" button adjust values in the menu. b. With user's RC 1. PowerTVOn 2. Press Menu button and call up User OSD Menu 3. Select Audio-> Balance 4. Enter 0->5->3 ->2 in se
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5.2.2 Factory Option Notes Item Default Options M-Can enter factory mode with factory RC or user RC. 1 M MODE M, U U-Can enter factory mode only with user' s RC. Note: MODE "M" is only used for factory production. 5.2.3 Version Info Item Default Options Note 1 Version Software version 2 Date The date of current version Note: Software version info of the TV, readable only. 5.2.4 Clear the EEPROM Item Meaning Note Clean Clean data except Clear partly Protected _ data and Auto Color data Clean All
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Offset: TV AV S-Video Component VGA HDMI R Offset 116 116 116 121 124 120 G Offset 124 124 124 125 126 128 B Offset 124 124 124 125 127 128 Cool: TV AV S-Video Component VGA HDMI R Gain 119 119 119 141 127 120 G Gain 125 125 125 145 120 122 B Gain 145 145 145 160 145 147 Warm: TV AV S-Video Component VGA HDMI R Gain 134 134 134 156 142 135 G Gain 125 125 125 145 120 122 B Gain 130 130 130 145 130 132 5.3.2 Video Curve: TV AV S-Video Component VGA HDMI Bright Max 600 650 650 700 700 650 Bright Mi
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5.3.3 Picture Mode TV AV S-Video Component VGA HDMI Vivid Bright 55 55 55 55 55 55 Vivid Contrast 55 55 55 55 55 55 Vivid 55 55 55 55 55 55 Saturation Std Bright 50 50 50 50 50 50 Std Contrast 50 50 50 50 50 50 Std 50 50 50 50 50 50 Saturation Hovie Bright 45 45 45 45 45 45 Hovie 45 45 45 45 45 45 Contrast Hovie 45 45 45 45 45 45 Saturation 5.3.4 Volume Curve: Min 20 Mid 80 Max TV 0 24 34 49 80 AV/S-Video 0 23 30 47 67 component 0 23 30 47 67 HDMI 0 19 24 35 52 VGA 0 23 30 47 67 Note: Set Downmi
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6. Software Upgrading The software is upgraded by a burning toll-MtkTool, which can burn the program file *.bin to the main board of the unit. 6.1 Get ready for upgrading 6.1.1 Install the driver _L-2303 Briver Double click the icon , install the driver. PL-2303Driver Installer Setupis: preparing theInstallShield? Wizard°_,,,hieh ,,,_ill guideyouthroughtherestofthesetup process. Pleasewait. ......... _';'n_'_i'"'""_ Select the default value, the driver will be installed step by step. 6.1.2 Hardw
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For the first connecting, the pc will recognize and automatically install the USB device. The process is just like the installation of a mini disk, see the following picture. The -.vizard is installing software, Please wait.... _rzpi. _y_ Last $1,_)(1_) N e xt Nt_o['l',I) Ca.ncel_ _ Finish Finding New Hardware _/_¢Szard+ _ The wizard has finished the sofN,'are mstallatlo " " n :_-' Prolific IfSB-to-Serial Comm Port If you close thev,Jzard, Please click rtmsn . ' -19-
