Rx is a resistor, there are many resistors in the circuit diagram, according to the serial number, R1, R2,...

Cx is a non-polar capacitor, power input anti-jamming capacitor

IC integrated circuit module

Ux is an IC (Integrated Circuit Element)

Tx is the test point (factory test)

Spk1 is Speaker (buzzer, speaker)

Qx is a transistor

CEx-electrolytic capacitor, CNx-discharge, RNx-exclusion, CONx-connector, Dx-Diode, Lx-inductance / magnetic beads, LEDx-light-emitting diodes, Xx-crystal.

RTH (thermistor)

CY (Y capacitor: high-voltage ceramic capacitors, safety regulations)

CX (X capacitor: high voltage film capacitors, safety regulations)

D (diode)

W regulator tube

K switch class

Y crystal

R117: resistance on the motherboard, serial number 17.

T101: Transformer on the motherboard.

SW102: switch

LED101: light-emitting diode

LAMP: (indicator) lights

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