Panasonic TX-25AD50F, Service Manual

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23
SCHEMATIC DIAGRAM FOR MODELS
TX-29AD50F
TX-25AD50F
(Euro-3H Chassis
)
Notes
1. RESISTOR
All resistors are carbon ¼W resistor, unless marked as follows:
Unit of resistance is OHM (W) (K=1,000, M=1,000,000).
2. CAPACITORS
All capacitors are ceramic 50V, unless marked as follows:
Unit of capacitance is mF, unless otherwise stated.
3. COIL
Unit of inductance is mH, unless otherwise stated.
4.
Components marked 'L' on the schematic diagram shows leadless parts.
5. TEST POINT
6. EARTH SYMBOL
7. VOLTAGE MEASUREMENT
Voltage is measured by a DC voltmeter.
Measurement conditions are as follows:
Power source AC 220V-240V, 50Hz
Receiving Signal Colour Bar signal (RF)
All customer controls Maximum position
8.
9.
This schematic diagram is the latest at the time of printing and is subject to change without notice.
Remarks
1.
The Power Circuit contains a circuit area which uses a separate power supply to isolate the earth connection. The circuit is defined by HOT and COLD
indications in the schematic diagram. All circuits, except the Power Circuit, are COLD. Take the following precautions:
Precautions
a.
Do not touch the hot part, or the hot and cold parts at the same time, as you are liable to a shock hazard.
b.
Do not short-circuit the hot and cold circuits as electrical components may be damaged.
c.
Do not connect an instrument, such as an oscilloscope, to the hot and cold circuits simultaneously, as this may cause fuse failure. Connect the earth of the
instruments to the earth connection of the circuit being measured.
d.
Make sure to disconnect the power plug before removing the chassis.