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Printed circuit board manually test principle
Addtime:2011-08-02
A printed circuit board manual test fixture: Manually

circuit board test fixture means: through the needle bed, manual test fixture, PCB pins, input / output interface, the control signal and the input signal is applied to the circuit under test plate and real-time readout of the output signal of the circuit board, and then judge the performance of the tested circuit board (or function) is correct or not, through a series of data analysis and processing.

Due to the testing requirements of the user, test objects of the same specific performance (or function) test principle and test methods also vary. It needs to be tailored single customized to meet the user’s requirements.

Example: a Japanese-funded VCR the professional enterprise - VCR motherboard function test tooling

(A), requires

1) detection VCR motherboard function is correct (the video, the playback, rewind, pause, production number input to the VCR input clock)

2) test equipment: a computer (RS232 interface), tone generator, power supply system, VCR, audio receiver, TV machines, oscilloscopes.

(B), the the try block diagram (detection VCR motherboard)

(C), works

Computer connected through the interface and VCR motherboard, so you can read and write set motherboard time, serial number and format ... The audio signal into the tooling CN1, turn on the power supply system. Tooling audio signal CN5 while connected to the audio receiver; waveform test points and tooling the CN6 connected to an oscilloscope; monitoring the correctness of its VCR playback function on the TV at the same time.

Click:1101
 

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