PCBA Technology - The meanings of the letters of electronic components on the PCBA

What are the meanings of the letters of the electronic components on the PCBA?

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

Cx is an unpolarised capacitor, the antidisturbance capacitance of the power input.

IC integrated circuit module

Ux is the IC (integrated circuit element).

Tx is the test point (for factory test).

Spk1 is Speaker.

Qx is Triode

CEx - Electrolytic Capacitor,CNx - Choke Capacitor, RNx - Choke Resistor, CONx - Connector,Dx - Diode,Lx - Inductor / Bead,LEDx - Light Emitting Diode, Xx - Crystal.

RTH (Thermal Resistor)

CY (Y Capacitor: High Voltage Ceramic Capacitor,Safety Regulation)

CX (X Capacitor: High Voltage Film Capacitor,Safety Regulation)

D (Diode)

W regulator

K Switch

Y crystal oscillator

R117: Resistor on the motherboard, serial number 17.

T101: Transformer on the motherboard.

SW102:Switch

LED101:Light Emitting Diode

LAMP:Lighting lamp

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