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File name KONKA KP2107ASTN SM.pdf

SERVICE MANUAL Color Television Receiver Model: KP2107ASTN SPECIFICATION 1 SPICIFICATION System TV PAL SECAM D/K, B/G ,I D/K,B/G AV PAL SECAM NTSC 50/60 50 4.43/3.58MHz Channel VHF-Low VHF-High: UHF: 49.75MHz~160.25MHz 168.25MHz~456.25MHz 471.25MHz~863.25M Scanning Line 625/525 Line Horizontal Frequency 15625/15750 Hz Vertical 50/60 Hz Video Sound Chroma 38.9MHz 32.4/32.9/33.4 MHz 34.47 MHz 34.4 MHz(SECAM) 34.65 MHz(SECAM) 48 dBV 48 dBV 51 dBV IF Frequency Sensitivity VHF LOW VHF HIGH UHF Audio Output Power Antenna Impedance Power Consumption Power Supply 7% THD 1.2W + 1.2W 75 75W AC 110-240V 50/60Hz 2 IMPORTANT SERVICE SAFETY INFORMATION Operating the receiver outside of its cabinet or with its back removed involves a shock hazard. Work on these models should only be performed by those who are thoroughly familiar with precautions necessary when working on high voltage equipment. Exercise care when servicing this chassis with power applied. Many B plus and high voltage RF terminals are exposed which, if carelessly contacted, can cause serious shock or result in damage to the chassis. Maintain interconnecting ground lead connections between chassis, escutcheon, picture tube dag and tuner when operating chassis. These receivers have a "polarized" AC line cord. The AC plug is designed to fit into standard AC outlets in one direction only. The wide blade connects to the 'ground side' and the narrow blade connects to the 'hot side' of the AC line. This assures that the TV receiver is properly grounded to the house wiring. If an extension cord must be used, make sure it is of the 'polarized' type. Since the chassis of this receiver is connected to one side of the AC supply during operation, service should not be attempted by anyone not familiar with the precautions necessary when working on these types of equipment. When it is necessary to make measurements or tests with AC power applied to the receiver chassis, an Isolation Transformer must be used as a safety precaution and to prevent possible damage to transistors. The Isolation Transformer should be connected between the TV line cord plug and the AC power outlet. Certain HV failures can increase X-ray radiation. Receivers should not be operated with HV levels exceeding the specified rating for their chassis type. The maximum operating HV specified for the chassis used in these receivers is 27kV±1.0kV at zero beam current with a liner voltage of 110/240V AC. Higher voltage may also increase the possibility of failure in the HV supply. It is important to maintain specified values of all components in the horizontal and high voltage circuits and anywhere else in the receiver that could cause a rise in high voltage, or operating supply voltages. No changes should be made to the original design of the receiver. Components shown in the shaded areas on the schematic diagram and identified by in the replacement parts list should be replaced only with exact factory recommended replac