Service Manuals, User Guides, Schematic Diagrams or docs for : KONKA TV KDT143AST Konka_KDT143AST

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Konka_KDT143AST


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   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 operating HV specified for the chassis used in
these receivers is 27kV



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