Meaning
Physical fixtures automate the verification of assembled circuit boards by applying power and signals to specific test points. A functional test jig uses a bed of spring loaded pogo pins to establish electrical contact with the board without the need for soldering. This apparatus confirms that the finished assembly performs all its intended electrical tasks before it is placed into an enclosure.
Mechanical Alignment
Precision guides hold the printed circuit board in the exact position required for the probes to hit their targets. The functional test jig must maintain this alignment across thousands of cycles to prevent false failures or damage to the components. Pneumatic or manual clamps provide the necessary downward force to ensure stable electrical connections.
Electrical Probe
Signals are injected into the device to simulate real world operating conditions. The functional test jig monitors the response of the circuitry, measuring voltage levels and communication waveforms against a predefined pass or fail limit. It can also be used to program the initial firmware and unique serial numbers into the device memory.
Signal Verification
Automated software captures the data from the probes and generates a report for each unit. If a functional test jig detects a short circuit or a missing signal, the unit is flagged for manual inspection and repair. This high speed screening ensures that only fully operational boards reach the final assembly line.
