Service Manual 1. Precautions and notices BEFORE SERVICING THE LCD TV, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. WHEN REPLACEMENT PARTS ARE REQUIRED, BE SURE TO USE REPLACEMENT PARTS SPECIFIED BY THE MANUFACTURER. Proper service and repair is important to the safe, reliable operation of all Hisense Electric Co., Ltd Equipment.
undertaken any such broad evaluation. Accordingly, a serviceman that uses a service procedure or tools, which are not recommended by Hisense, must first satisfy himself thoroughly that neither his safety nor the safe of the equipment will be jeopardized by the service method selected. Hereafter throughout this manual, Hisense Electric Co., Ltd will be referred to as Hisense.
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All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD). Careless handling during repair can reduce life drastically. When repairing, make sure that you are connected with the same potential as the mass of the set by a wristband with resistance.
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cable clamps. -The insulation of the mains lead should be checked for external damage. 1.1.6 (1) Do not touch Signal and Power Connector while this product operates. Do not touch EMI ground part and Heat Sink of Film Filter. (2) Do not supply a voltage higher than that specified to this product. This may damage the product and may cause a fire.
(7) Do not pull out or insert the power cable from/to an outlet with wet hands. It may cause electric shock. (8) Do not damage or modify the power cable. It may cause fire or electric shock. (9) If the power cable is damaged, or if the connector is loose, do not use the product: otherwise, this can lead to fire or electric shock.
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removing the power board, start servicing at least 2 minutes after the main power has been turned off. • While the main power is on, do not touch any parts or circuits other than the ones specified. If any connection other than the one specified is made between the measuring equipment and the high voltage power supply block, it can result in electric shock or activation of the leakage-detection circuit breaker.
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problems resulting from scratches on the parts, the deformation of parts, and short-circuits due to residual electric charge. • Routing of the wires and fixing them in position must be done in accordance with the original routing and fixing configuration when servicing is completed. All the wires are routed far away from the areas that become hot (such as the heat sink).
3. Factory/Service OSD Menu and Adjustment 3.1 How to enter the Factory OSD Menu With user’s RC Power on the TV. 1. Press “Menu” button and call up User OSD Menu. 2. Select “ Sound” -> press “OK” button on RC to ensure then move button to “Balance”...
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White Balance: Colour Temp R Gain G Gain B Gain R Offset G Offset B Offset Function: TO Fac Power mode last memory Software update start Uart bebug on/off I tem Default Options Notes M-Can enter factory mode with factory RC or user RC. MODE M, U U-Can enter factory mode only with...
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3.2.2、Design Menu White balance Picture Curve Volumn Curve Sound Mode Note : The above “Factory/Service OSD Menus” are reference only, please refer to the actual unit to determine the appearances. - 20 -...
4. Software updating 4.1 USB upgrade USB upgrade includes two methods. One is USB directly upgrade the other is USB menu upgrade. * USB directly upgrade 1、LHD32D50TAM upgrading file rename——SIS512_52.bin LTDN40D50TAM upgrading file rename——SIS512_67.bin 2、Unlock the compress upgrading file and copy the le to the USB SI S5 1 2 _ XX.bin fi disk root directory which not contain other *.bin files.
When 100%, next appear: When 100%, next appear: It indicates that USB Upgrades successfully.Plug the USB disk ,then TV can automatically restart. Note: During upgrading, power other abnormally operations .otherwise boot can be destroied .since boot is destroied , USB upgrading method is availability no longer.
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2、Hardware connecting You can update the software through a special tool (as following) Connect the SIS debug board to TV use VGA port the other USB port to the PC. USB port Connect to the PC Connect to the TV VGA por 3、SIS Tool upgrade with Uart2spi updating Tool Connect the SIS debug board.
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“Comport setting “item need choose corresponding com port. How to look up corresponding com port? Now show.as following - 24 -...
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Click “Connect” button AC power on the TV, interface as following. click “Restore” item、load the *.bin file then click “restore “button - 25 -...
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Updating…… ,about 13 minutes. As following. after“Restore successful”appears as following.it indicates the main software upgrading is successful. then AC power off and power on the TV. - 26 -...
5.Trouble shooting 5.1 Troubleshooting for Remote Control Remote control does not work Try new batteries Replace battery Replace RC Replace remote control Check IR receiver Change Led & IR board Replace Led & IR BD Change Led & IR cable Replace Led &...
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5.2 Troubleshooting for Function Key Buttons does not work Check solder connections and Check switches see if any switches are stuck. Replace Key BD Check key board Check Key BD cable Change Key BD Replace main board - 28 -...
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5.3 TV won’t Power On TV won’t power on Make Sure Power Check Power light? source is live Output Replace Check Power BLUE Power Cord Cord Check/replace IR Only BD or Keypad one works Try Power on by Check signal RC and Button Panel Bright Source...
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5.4 Troubleshooting for Audio No sound Reconnect Check connecter Replace speaker wire Check speaker wire Replace speaker set Check speaker set Replace main board Power Supply Board - 30 -...
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5.5 Troubleshooting for TV/VGA/HDMI input No picture on the screen Check Signal Source Make sure signal source is available Reconnect Check connect Replace cable Check cable Replace main board - 31 -...
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5.6 Troubleshooting for YPbPr input Note: (The K220 mould TV has not YPbPr input) No picture on the screen Check Source work or not Check Source Device Reconnect Check connect Check Wires (Green Blue, Red) Replace wires Replace main board - 32 -...
5.7 Troubleshooting for Video input No picture on the screen Check Source work or not Check Signal Source Reconnect Check connect Replace Cable/Wires Check Cable/ Wires Replace main board 6. Circuit instruction Power assign and Main board signal process - 33 -...