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File name L6B Service Manual.pdf

L6B TFT- LCD TV SERVICE MANUAL CONTENTS PAGES Safety instructions 1 Technical specifications 2 Panel Specification 3 Back appearance of TV 5 Interconnection Diagram 5 Block diagram 6 Block diagram of power supply 7 Service mode 8 Service Mode items and values 10 Data sheet of important IC's and parts 11 Recommended Part List 23 Frequency list of channels 25 SAFETY PRECAUTIONS GENERAL GUIDELINES There are electro-static sensitive components such as CMOS in LCD Module. Please earth human 1. It is advised to insert an isolation transformer in the body when handle the LCD.In addition, please do AC supply before servicing a hot chassis. not touch the interface connector pin with bare. 2. Always use the manufacturer's replacement safety components. The critical safety components marked 8 - Do not operate for a long time under the same pattern with on the schematics diagrams should not be Operating LCD for a long time under the same by other substitutes. Other substitute may create the electrical shock , fire or other hazards. Take pattern can cause image persistence and can attention to replace the spacers with the originals. damage it. Please follow following guidance. Furthermore where a short circuit has occurred , 1. Turn the power off when do not use. replace those components that indicate evidence of 2. Change the pattern periodically. overheating. 3. After servicing , see that all the protective devices LEAKAGE CURRENT COLD CHECK such as insulation barriers, insulation papers, shields 1. Unplug the AC cord and connect a jumper and isolation R-C combinations are correctly between the two prongs of the plug. installed. 2. Turn the receiver's power switch. 4. When the receiver is not being used for a long time 3. Measure the resistance value with an ohmmeter, of period of time , unplug the power cord of the between the jumpered AC plug and each exposed Adaptor from the AC outlet. metallic cabinet part on the receiver. When the exposed Color TFT LCD Module is very sensitive metallic part a return path to the chassis the reading should be between 4Mohm and the 20Mohm. When the both electrically and physically.Users,