A PCB assembly test stand is a device used to test PCB assembly end products. When making PCB assembly test racks, PCB assembly processing plants usually need to provide Gerber files and PCB assembly samples to facilitate the production of test racks. For the current PCB assembly test bench, only a few pressure plate buckles are installed on the test platform, and the PCB assembly is fixed by the thimble and the pressure plate buckle. During the PCB assembly functional test, press the PCB assembly into the clamp with both hands. Due to PCB assembly with uneven force or insufficient pressing, it is easy to make the test pin and the PCB assembly have poor contact, which seriously affects the test efficiency and accuracy. If the force is too large, it is easy to deform or damage when the PCB assembly is pressed down, and it is easy to damage the test pin of the test stand. cause greater losses.
1. Material preparation.
After determining the plan according to the data, it is necessary to prepare hardware materials (electronic components), related additional peripheral circuits, equipment, frame materials (such as acrylic board), glue, electric batch, screws, wire materials, etc., to determine the data for the production plan.
2. Determination and inspection of the structure of the test stand
3. Wiring requirements
(1) The wire opening needs to be opened within 2mm. First add tin to the wire opening and the tin wire position of the test needle.
(2) The welded wire should not have swing or loosening.
(3) Separate the strong and weak wires in the test stand 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 in the measuring frame, the casing of the fire must be grounded.
(7) The test stands must be installed fuse, and it cannot be replaced by wires or other conducting wires. Remove the 13A fuse on the original plug. When replacing the fuse, pay attention to how much current the model under test needs. The replacement principle is determined by the working current of the product 8 -10 times is enough.
4. The selection of points for quality inspection must follow the principles of comprehensiveness, effectiveness and economy.
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Post time: Aug-23-2022