Rx is a resistor, there are many resistors in the circuit diagram, numbered sequentially, R1, R2…
Cx is a non-polar capacitor, anti-interference capacitor at the power input terminal.
IC is an integrated circuit module.
Ux is an IC (integrated circuit component).
Tx is a test point (for factory testing).
Spk1 is a Speaker (buzzer, horn).
Qx is a transistor.
CEx – electrolytic capacitor, CNx – array capacitor, RNx – array resistor, CONx – connector, Dx – Diode, Lx – inductor/magnetic bead, LEDx – light-emitting diode, Xx – crystal oscillator.
RTH (thermistor).
CY (Y capacitor: high-voltage ceramic capacitor, safety regulations).
CX (X capacitor: high-voltage film capacitor, safety regulations).
D (diode).
W is a voltage regulator.
K is a switch type.
Y is a crystal oscillator.
R117: resistor on the main board, numbered 17.
T101: transformer on the main board.
SW102: switch.
LED101: light-emitting diode.
LAMP: (indicator) light.
Q104 (E, B, C): crystal transistor, E: emitter, B: base, C: collector.
