Introduction to the production steps and requirements of the PCBA test fixture

PCBA test fixture is a device for testing PCBA finished products. When making PCBAtest fixtures, PCBA processing factories usually need to provide Gerber files and PCBA samples to facilitate the production of test fixtures. For the current PCBA test bench, only a few pressure plate buckles are installed on the test platform, and the PCBA is fixed by the thimble and the pressure plate buckle. During the PCBA functional test, press the PCBA into the clamp with both hands. Due to uneven force or insufficient pressure on the PCBA, it is easy to cause poor contact between the test needle and the PCBA, which seriously affects the test efficiency and accuracy. cause greater losses.

1. Material preparation After the plan is determined according to the data, it is necessary to prepare hardware materials (electronic components), related additional peripheral circuits, equipment, frame materials (such as acrylic plates), glue, electric batches, screws, wire materials, etc., to make Program confirmation information.

Second, the determination and inspection of the structure of the test frame.

3. Wiring requirements

(1) The opening of the wire needs to be opened within 2mm. First, tin the opening of the wire and the tin position of the test needle.

(2) The welded wire should not have swing or loose phenomenon.

(3) Separate the strong and weak wires in the test frame and tie the wires with wires.

(4) The joints of the ammeter and the voltmeter must be installed with a multimeter pen. Banana plugs cannot be installed to test current, voltage and other functions to ensure the safety of the operator.

(5) The signal line of the connection of the high-frequency product model must use a shielded wire to ensure the safety of the grounding of the external network.

(6) If there is a fire bull in the measuring frame, the casing of the fire bull must be grounded.

(7) The fuse must be installed on the test stand. It cannot be replaced with wires or other wires. Remove the 13A fuse on the original plug. When replacing the fuse, pay attention to how much current the tested model needs. The replacement principle is determined by the working current of the product. 8-10 times.

4. Quality inspection of selected points

Point selection must follow the principles of comprehensive, effective and economical.