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Now downloading free:AIWA AWA W6900SF SERVICE MANUAL

AIWA AWA W6900SF SERVICE MANUAL free download

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AWA W6900S/SF 29"(74 CM) COLOUR TV WITH INFRARED REMOTE CONTROL SERVICE MANUAL SAFETY INSTRUCTIONS WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE" DESCRIBED BELOW. X-RAY RADIATION PRECAUTION 1. Extremely high voltage of the picture tube may result in producing potentially hazardous X-RAY RADIATION. To avoid such hazards, the high voltage must not be above the specified limit. The nominal value of the high voltage of this receiver is about 30.4 kV at zero beam current (minimum brightness) under 175-245V AC power source. The high voltage must, under any circumstances, not exceed about 36kV. Each time this receiver requires servicing, the high voltage should be checked according to the HIGH VOLTAGE CHECK procedure at the back of this manual. it is recommended to record the reading of the high voltage in the service record each time. Using an accurate and reliable high impedance and high voltage meter is quite important. Connect the NEGATIVE and POSITIVE probe of a high voltage meter to the "ground" and the high voltage anode cap of the picture tube respectively. Picture tube high voltage anode cap High impedance and high voltagh meter Chassis Picture tube ground HIGH VOLTAGE CHECK CONNECTION DIAGRAM 2. The only source of X-RAY RADIATION in this receiver is the picture tube. For ensuring the intensity of X-RAY RADIATION from the picture tube being within the specified safety limit, the replacement picture tube must be exactly the same type specified in the parts list. 3. Some parts in this receiver have special safety-related characteristics which would affect X-RAY RADIATION protection. For safety, parts replacement should be carried out only after referring to the "PRODUCT SAFETY NOTICE" below. PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this receiver have special safety-related characteristics (directly relate to high voltage, high temperature or electric shock) which are not easily seen by visual inspection. Whenever replacing such components, make sure that the replacement parts can provide effective X-RAY RADIATION protection even though their high voltage and wattage can meet the specification of the original design. Such parts can be identified by shading and marking with in the schematic diagram and the parts list. Before replacing any of these components, read the parts list in this manual carefully. Using substitute parts which do not have the same safety characteristics as the ones specified in the parts list may create excessive X-RAY RADIATION. 2 I2C BUS CONCEPT (1). Characteristics 1.



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