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The meaning of the characters on the PCB

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Many characters are often printed on the circuit board. Let's take a look at the meaning of common characters.

Rx is a resistor, and there are many resistors in the circuit diagram, ranked by number, R1, R2.
 
Cx is a non-polarized capacitor, and the power input capacitor is interference-free.
 
CEx: Electrolytic Capacitor
 
CY: (Y capacitor: high voltage ceramic capacitor, safety regulations)
 
IC: integrated circuit module
 
Ux: Integrated Circuit Element
 
Tx: the test point (factory test)
 
Spk: Speaker (buzzer, horn)
 
CONx: connector
 
Dx: Diode
 
Lx: inductor/bead
 
LEDx: Light Emitting Diodes

Xx: crystal oscillator

RTH: Thermistor
 
SW: Switch

circuit board printed circuit board service components assembly breadboard Integrated circuit Resistor capacitor Diode Inductor Switch
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