Line space/width: 0.15mm/0.15mm
Solder mask: Green
Rounting: CNC/ V-Cut
Special technology: Blind buried holes/ BGA.
Application: Industrial control products.
E-Test: 100% E-Test With Flying Prob or E-Test Fixture
Inspection Standard: IPC-A-600H/IPC-6012B, Class 2/3
Outgoing Reports: Final Inspection, E-Test, Solderability Test, Microsection and so on.
PCB package: Vacuum packing / Plastic bag/ hard carton.
Certifications: UL, TS16949, RoHS, ISO14001:2004, ISO9001:2000, SGS.
Line space tester
The meaning of letters on a circuit board (PCB)
Rx is resistance, there are a lot of resistance in the circuit diagram, in order of the number, R1, R2...
Cx is non-polar capacitance, power input anti-disturbance capacitance
IC integrated circuit module
Ux is IC
Kx is defined differently for component libraries from different manufacturers
Tx is the test point (for factory test)
Spk1 is a Speaker
Qx is a triode
Jx is Jack(like Audio Jack)
Y1? Component library definitions vary from vendor to vendor
CY(Y capacitor: high voltage ceramic capacitor, safety regulation)
CX(X capacitance: high voltage film capacitance, safety regulation)
ZD(voltage stabilizing diode)
J (jumper wire)
W regulator tube
K switch class
R107, C118, Q102, D202 and other Numbers are often seen on the circuit board. Generally, the first letter identifies the device category, such as R for resistor, C for capacitor, D for diode, Q for three-stage tube, etc. The second is the number, represents the circuit function number, such as "1" represents the motherboard circuit, "2" represents the power circuit and so on, which is determined by the circuit designer himself;The third and fourth digits indicate the serial Numbers of similar devices on the circuit board.
R117: resistance on the motherboard, serial number 17.
T101: transformer on main board.
LAMP :(indicating) LAMP
Q104(E,B,C) : transistor, E: emitter,B: base,C: collector
"If R117 is a resistance, the two ends should be connected by a multimeter." it is not scientific to directly measure the resistance on the circuit board. The measurement result will be smaller than the actual value, or even much smaller.
Please contact us freely for any PCB or PCBA issues:
Shenzhen Aibixing Industrial Co.,Ltd