Hisense Lcd42p69p Service Manual
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LCD Television
Service Manual
Chassis： MTK8222
Product Type：
LCD42P69P、LCD47P69P
Ver 1.0
Hisense Electric Co.，Ltd.
March，2009
- 2 - LCD TV Service Manual Hisense Confidential Contents Contents.......................................................................................................................................................................- 2 - Service Manual...........................................................................................................................................................- 3 - 1. Precautions and notices.....................................................................................................................................- 3 - 1.1 Warning...................................................................................................................................................- 4 - 1.2 Notes .......................................................................................................................................................- 7 - 2. Product Function Specifications .....................................................................................................................- 10 - 2.1 Product Function...................................................................................................................................- 10 - 2.2 Specifications........................................................................................................................................- 12 - 3. LCD Panel Spec..............................................................................................................................................- 13 - 4. Chassis Layout and Overall Wiring Diagrams ...............................................................................................- 16 - Boards and Chassis Layout.........................................................................................................................- 16 - 5. Factory/Service OSD Menu and Adjustment..................................................................................................- 17 - 5.1 To enter the Factory OSD Menu ...........................................................................................................- 17 - 5.2 Factory OSD Menu ...............................................................................................................................- 17 - 6 Software Upgrading ........................................................................................................................................- 21 - 6.1 Get ready for upgrading ........................................................................................................................- 21 - 6.2 Upgrading with the MtkTool ................................................................................................................- 23 - 6.3 Update with USB directly .....................................................................................................................- 27 - 7. Troubleshooting ..............................................................................................................................................- 29 - 7.1 Troubleshooting for Remote Control ....................................................................................................- 29 - 7.2 Troubleshooting for Function Key........................................................................................................- 30 - 7.3 TV won’t Power On ..............................................................................................................................- 31 - 7.4 Troubleshooting for Audio....................................................................................................................- 32 - 7.5 Troubleshooting for TV/VGA/HDMI input..........................................................................................- 33 - 7.6 Troubleshooting for YPbPr input ..........................................................................................................- 34 - 7.7 Troubleshooting for Video/S-Video input .............................................................................................- 35 - 8. Explode View..................................................................................................................................................- 36 - 9. Schematic circuit diagram ..............................................................................................................................- 36 -
- 3 - LCD TV Service Manual Hisense Confidential 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. The service procedures recommended by Hisense and described in this Service Guide 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. Hisense 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, Hisense has not undertaken any such broad evaluation. Accordingly, a serviceman that uses a service procedure or tools,
- 4 - LCD TV Service Manual Hisense Confidential 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. 1.1 Warning 1.1.1 Critical components having special safety characteristics are identified with a by the Ref. No. in the parts list. Use of substitute replacement parts, which do not have the same specified safety characteristics, may create shock, fire, or other hazards. Under no circumstances should the original design be modified or altered without written permission from Hisense. Hisense assumes no liability, express or implied, arising out of any unauthorized modification of design. Serviceman assumes all liability. 1.1.2. All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD). Careless handling during repair can reduce life drastically. When repairing, make sure DANGERCAUTION CAUTION TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURERS REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS SERVICE GUIDE.
- 5 - LCD TV Service Manual Hisense Confidential that you are connected with the same potential as the mass of the set by a wristband with resistance. Keep components and tools also at this same potential. 1. Never replace modules or other components while the unit is switched on. 2. When making settings, use plastic rather than metal tools. This will prevent any short circuits and the danger of a circuit becoming unstable. 1.1.3 To prevent electrical shock, do not use this polarized ac plug with an extension cord, receptacle, or the outlet unless the blades can be fully inserted to prevent blade exposure. To prevent electrical shock, match wide blade or plug to wide slot, fully insert. 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. 1.1.5 Safety regulations require that after a repair the set must be returned in its original condition. In particular attention should be paid to the following points. -Note: The wire trees should be routed correctly and fixed with the mounted 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
- 6 - LCD TV Service Manual Hisense Confidential 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. (3) Do not use this product in locations where the humidity is extremely high, where it may be splashed with water, or where flammable materials surround it. Do not install or use the product in a location that does no satisfy the specified environmental conditions. This may damage the product and may cause a fire. (4) 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. (5) If the product emits smoke, and abnormal smell, or makes an abnormal sound, immediately turn off the power. Continuing to use the product, it may cause fire or electric shock. (6) Do not disconnect or connect the connector while power to the product is on. It takes some time for the voltage to drop to a sufficiently low level after the power has been turned off. Confirm that the voltage has dropped to a safe level before disconnecting or connecting the connector. (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:
- 7 - LCD TV Service Manual Hisense Confidential otherwise, this can lead to fire or electric shock. (10) If the power connector or the connector of the power cable becomes dirty or dusty, wipe it with a dry cloth. Otherwise, this can lead to fire. (11) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, 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, be sure to turn OFF the POWER Button and disconnect the power cable from the power source of the TV during servicing. • To prevent electric shock and breakage of PC board, start the servicing work at least 30 seconds after the main power has been turned off. Especially when installing and 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
- 8 - LCD TV Service Manual Hisense Confidential equipment and the high voltage power supply block, it can result in electric shock or activation of the leakage-detection circuit breaker. • When installing the LCD module in, and removing it from the packing carton, be sure to have at least two persons perform the work. • When the surface of the panel comes into contact with the cushioning materials, be 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. • When handling the circuit board, be sure to remove static electricity from your body before handling the circuit board. • 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 circuit boards. Failure to observe this precaution may result in 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). These wires are fixed in position with the wire clamps so that the wires do not move, thereby ensuring
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LCD TV Service Manual
Hisense Confidential
that they are not damaged and their materials do not deteriorate over long periods of time.
Therefore, route the cables and fix the cables to the original position and states using the
wire clamps.
• Perform a safety check when servicing is completed. Verify that the peripherals of the
serviced points have not undergone any deterioration during servicing. Also verify that
the screws, parts and cables removed for servicing purposes have all been returned to
their proper locations in accordance with the original setup.
The lightning flash with arrowhead symbol, within an equilateral
triangle is intended to alert the user to the presence of uninsulated
dangerous voltage within the products enclosure that may be of sufficient magnitude to
constitute a risk of electric shock.
The exclamation point within an equilateral triangle is intended to alert
the user to the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the set.
- 10 - LCD TV Service Manual Hisense Confidential 2. Product Function Specifications 2.1 Product Function Front Cabinet