KONKA Konka KDT143AST free download

File name Konka_KDT143AST.pdf

SERVICE MANUAL Color Television Receiver Model: KDT143AST SPECIFICATION 1 SPICIFICATION System TV PAL D/K, B/G, I SECAM D/K, B/G, L AV PAL 50/60 SECAM 50 NTSC 4.43/3.58MHz Channel VHF-Low 49.75MHz~160.25MHz VHF-High: 168.25MHz~456.25MHz UHF: 471.25MHz~863.25M Scanning Line 625/525 Line Horizontal Frequency 15625/15750 Hz Vertical 50/60 Hz IF Frequency Video 38.9MHz Sound 32.4/32.9/33.4 MHz Chroma 34.47 MHz 34.4 MHz(SECAM) 34.65 MHz(SECAM) Sensitivity VHF LOW 48 dBV VHF HIGH 48 dBV UHF 51 dBV Audio Output Power 7% THD 1.5W + 1.5W Antenna Impedance 75 Power Consumption 75W Power Supply AC 220-240V 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 o