The meaning of the letters on the PCB board

Rx is the resistance, there are a lot of resistors in the circuit diagram, in the order number, R1, R2...

Cx is a non-polar capacitor, and the power input end is anti-interference capacitance.

IC integrated circuit module.

Ux is IC(integrated circuit component)

Tx is the test point (factory test)

Spk1 is the Speaker(buzzer, horn)

Qx is a triode.

CEx- electrolytic capacitor, CNx- row capacity, RNx- row resistance, CONx- connector, Dx- bond (Diode), Lx- inductance/magnetic bead, LEDx- light emitting Diode, Xx- crystal oscillator.

RTH(thermistor)

CY(Y capacitance: high voltage ceramic capacitance, safety gauge)

CX(X capacitance: high voltage film capacitance, safety gauge)

D(diode) on the fr4 pcb board

W regulator tube

K switch class

Y crystals

R117: resistance on the main board, the serial number is 17.

T101: transformer on the main board.

SW102: switch

LED101: light-emitting diode.

LAMP: LAMP

Q104(E,B,C) : transistor transistor, E: emitter,B: base,C: collector.