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File name NEO CHASSIS M113.pdf

TCL M113 Chassis Service Manual SERVICE MANUAL FOR M113 CHASSIS PART I. Servicing Precautions When working, the unit is with ultra high voltage about 25KV inside. So, to avoid the risk of electric shock, be careful to adjust the chassis! 1. Only qualified personnel should perform service procedures. 2. All specification must be met over line voltage ranger of 110V AC to 240V AC 50Hz/60Hz. 3. Do not operate in WET/DAMP conditions. 4. Portions of the power supply board are hot ground. The remaining boards are cold ground. 5. Discharge of CRT anode should be done only to CRT ground strap. 6. When fuse blow, ensure to replace a fuse with the same type and specification. 7. Keep the wires away from the components with high temperature or high voltage. 8. When replacing the resister with high power, keep it over the PCB about 10mm. 9. The CRT anode high voltage has been adjusted and set in the factory. When repairing the chassis, do not make the high voltage exceed 27.5KV (The beam current is 0uA). Generally, the high voltage is set on 25.5KV 1.5KV (The beam current is 700uA). * The values of parameters above are for information only. 10. Before return the fixed unit, do check all the covering of wires to ensure that not fold or not short with any metal components. Check the entire protection units, such as control knobs, rear cabinet & front panel, insulation resister & capacitor, mechanical insulators and so on. 11. There are some mechanical and electrical parts associating with safety (EMC) features (Generally related to high voltage or high temperature or electric shock), these features cannot be found out from the outside. When replace these components, perhaps the voltage and power suit the requirements, but efficient X-ray protection may not be provided. All these components are marked with in the schematic diagram. When replace these, you'd better look up the components listed in this manual. If the component you replaced not has the same safety (EMC) performance, harmful X-ray may be produced. 1 02/12/09 TCL M113 Chassis Service Manual Part -Product Specification 1. Ambient conditions: 1.1 Ambient temperatures: a. Operating: -10 ~ +40 b. Storage: -15 ~ +45 1.2 Humidity a. Operation: < 80% b. Storage: < 90% 1.3 Air pressure: 86kpa ~ 106kpa 2. M113 Chassis Specification 2.1 MCU&Chroma Decoder:TMPA8809 Super one chip IC 2.2 System PAL DK/BG/I SECAM DK/BG NTSC 3.579/4.43 AV MODE Receiving channels 48.25MHz 463.25MHz (Hyper band) 471.25MHz 855.25MHz (UHF) Scanning lines and frequencies 525/625 lines 15.625kHz/15.75kHz 50/60Hz Color sub-carrier 4.433