Block And Schematic Diagrams; Schematic Diagram Notes - Panasonic TX-17LX2 Service Manual

7 Block and Schematic Diagrams

7.1. Schematic Diagram Notes

Important Safety Notice
Components identified by mark have special characteristics important for safety.
When replacing any of these components, use only manufacture's specified parts.
Notes:
1. Resistor
All resistors are cabon 1/4W resistor, unless marked as follows:
Unit of resistance is OHM[ ] (K=1,000, M=1,000,000).
: Nonflammable
: Solid
: Wire Wound
2. Capacitor
All capacitors are ceramic 50V capacitor, unless marked as follows:
Unit of capacitance is F, unless otherwise noted.
: Temperature Compensation
: Polyester
M
: Metalized Polyester
m
: Polypropylene
3. Coil
Unit of inductance is F, unless otherwise noted.
4. Test Point
: Test Point position
5. Earth Symbol
: Chassis Earth (Cold)
6. Voltage Meaaurement
Voltage is measured by a DC voltmeter.
Conditions of the measurement are the following:
Power Source
Receiving Signal
All customer's controls
7. Number in red circle indicates waveform nember.
(See wavefom pattern table.)
8. When arrow mark( ) is found, connection is easily found from the direction of arrow
9. Indicates the major signal flow.
10. This schematic diagram is the latest at the time of printing and subject to change
without notice.
: Metal Oxide
: Metal Film
: Fuse
: Electrolytic
: Bipolar
NP
: Dipped Tantalum
T
: Z-Type
Z
: Line Earth (Hot)
AC 100-240V, 50/60Hz
Colour Bar signal(RF)
Maximum positions
: Video Audio
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. Take
the follwing precautions.
All circuits, except the Power Circuit, are cold.
Precautions
a. Do not touch the hot part or the hot and cold parts at the same time or
you may be shocked.
b. Do not short-circuit the hot and cold circuits or a fuse may blow and
parts may break.
c. Do not connect an instrument, such as an oscilloscope, to the hot and
cold circuits simultaneously or a fuse may blow.
Connect the earth of instruments to the earth connection of the circuit
being measured.
d. Make sure to disconnect the power plug before removing the chassis.
2. Following diodes are interchangeable.
MA150-MA162(Replacement part)
12