PCB board assembly process requirements
2023-12-11
1. After the initial soldering of the PCB board is completed, it should be uniformly numbered (the last two digits of the year number + serial number). Use a marker pen to write clearly on the front of the board. In order to prevent the mark from being lost during processing and cleaning, the same number should be written in another position on the board (generally on the inverted surface of the 96 bent blade). For the convenience of management, this number should be permanently retained, and the number management is the responsibility of the librarian
2. In order to avoid and minimize the bumps and scratches on the surface of the components, in the process of processing, transportation and storage of the board, attention should be paid to handling gently, and the board should generally be isolated and stacked between the boards, or reversed (that is, face-to-face or back-to-back).
3. In order to prevent electrostatic effects, the operation that may come into contact with active devices requires wearing gloves. If the site is not available, safety measures must be taken to ensure the safety of the device.
4. After the PCB board passes the test (that is, it has the conditions for getting on the machine), the operator should be responsible for finishing the whole board, including:
(1) Cut off the pins that are too high, and pay attention to remove the residue on the clean board.
(2) The front flying line should be as hidden as possible, and the back flying line should take a shortcut in principle; Solder joints and long flying wires should be covered and fixed with glass glue, and glue should be used as little as possible.
(3) Clear the redundant identification (such as the fault record made during the debugging process must be cleared). Excess components should be completely cut out.
(4) The color of the rear baffle of the same device should be basically the same. Screws, spacers, and handles should be complete and consistent. Inspect all types of butterflies and keep them tight.
(5) Clean the surface with a brush and plate washing liquid, so that the board and the objects on the board are free of floating dust and obvious stains. If you use a cotton ball to remove the dirt, you must also pay attention to remove the residual cotton tiredness.
(6) The PCB board with residual acid shall not be used in the new machine: if it is slightly damaged, it can be used prudently for repair products under the premise of taking process instructions and ensuring the safety of the quantity.
(6) The PCB board with residual acid shall not be used in the new machine: if it is slightly damaged, it can be used prudently for repair products under the premise of taking process instructions and ensuring the safety of the quantity.
5. The principle of reworking PCB board treatment for rework device is the same as above.
6. Unless otherwise arranged, the above-mentioned finishing work shall be undertaken by the operator responsible for PCB board testing and repair, and the final assembly shall be responsible for reviewing and correcting before installation.
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