Rx is the resistance, a lot of resistance in the circuit diagram, according to the serial number, R1, R2. . .
Cx is a non-polar capacitor, power input capacitance interference
IC integrated circuit module
Ux is an IC (Integrated Circuit Component)
Tx is the test point (factory test)
Spk1 is Speaker (buzzer, speaker)
Qx is a transistor
CEx -Electrolytic Capacitor, CNx-Capacitor, RNx-Exclusion, CONx-Connector, Dx-Diode, Lx-Inductor / Bead, LEDx-LED, Xx-Crystal.
CY (Y capacitor: high-voltage ceramic capacitors, safety regulations)
CX (X capacitor: high-voltage film capacitors, safety regulations)
K switch class
R117: Motherboard resistance, number 17.
T101: Transformer on the motherboard.
LED101: light-emitting diode
LAMP: (indicator) light
Q104 (E, B, C): Transistor, E: Emitter, B: Base, C: Collector