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Toshiba_50WP16A_50WP16C_50WP16H_50WP16R_50WP16EA_50HP81_[SM]


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                   FILE NO. 050-200122




SERVICE MANUAL



PLASMA DISPLAY MONITOR
 50WP16A, 50WP16C
 50WP16H, 50WP16R
 50WP16EA, 50HP81




                 PRINTED IN JAPAN Oct.,2001 2
13 Block and Schematic Diagrams
13.1. Schematic Diagram Notes
                                                                                                                          Remarks:
                                            Important Safety Notice                                                        1. The Power Circuit contains a circuit area which uses a separate power supply to isolate the
                                                                                                                              earth connection.
              Components identified by mark have special characteristics important for safety.
                                                                                                                              The circuit is defined by HOT and COLD indications in the schematic diagram. Take the
              When replacing any of these components, use only manufacture's specified parts.
                                                                                                                              follwing precautions.
                                                                                                                              All circuits, except the Power Circuit, are cold.
    Notes:                                                                                                                    Precautions
     1. Resistor                                                                                                                           a. Do not touch the hot part or the hot and cold parts at the same time or you may
         All resistors are cabon 1/4W resistor, unless marked as follows:                                                                     be shocked.
         Unit of resistance is OHM [W] (K=1,000, M=1,000,000).                                                                             b. Do not short- circuit the hot and cold circuits or a fuse may blow and parts may
                     : Nonflammable                                                        : Metal Oxide                                      break.
                     : Solid                                                               : Metal Film                                    c. Do not connect an instrument, such as an oscilloscope, to the hot and cold
                     : Wire Wound                                                          : Fuse:                                            circuits simultaneously or a fuse may blow.
     2. Capacitor                                                                                                                             Connect the earth of instruments to the earth connection of the circuit being
         All capacitors are ceramic 50V capacitor, unless marked as follows:                                                                  measured.
         Unit of capacitance is mF, unless otherwise noted.                                                                                d. Make sure to disconnect the power plug before removing the chassis.




                                                                     +
                                                                                                                           2. Following diodes are interchangeable.




                                                                         -
                     : Temperature Compensation                                            : Electrolytic
               M     : Polyester                                        NP
                                                                                           : Bipolar                                MA150- MA162 (Replacement part)
               m     : Metalized Polyester                                  T              : Dipped Tantalum
                     : Polypropylene                                        Z              : Z-Type
     3. Coil
         Unit of inductance is mF, unless otherwise noted.
     4. Test Point
                     : Test Point position
     5. Earth Symbol
                     : Chassis Earth (Cold)                                                : Line Earth (Hot)
     6. Voltage Measurement
         Voltage is measured by a DC voltmeter.
         Conditions of the measurement are the following:
                     Power Source ................................................... AC 220V-240V, 50/60Hz
                     Power Source ................................................... (A, B and E Version)
                     Power Source ................................................... AC 120V, 50/60Hz (U Version)
                     Receiving Signal ............................................... Colour Bar signal (RF)
                     All customer's controls ...................................... Maximum positions
     7. Number in red circle indicates waveform nember.
         (See waveform pattern table.)
     8. When arrow mark ( ) is found, connection is easily found from the direction of arrow

      9. Indicates the major signal flow.      : Video               Audio
      10. This schematic diagram is the latest at the time of printing and subject to change without




                                                                                                                     71
13.2. Main Block Diagram


                               
                        



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