? First, video joint welding

The welding joints used in the video connector are Lotus Head and BNC Head, and the video wires are 75-3 and 75-5.

1. When welding the connector, string the tail of the connector together, and then peel off the conductor, with a length of about 8- 10 mm. Don't make sure that the protector is not damaged, or you need to continue stripping.

2. Solder joints are all pasted with tin, that is, a layer of tin should be pasted on the core point and shielding point, which should be firm, round and full, so as to ensure the quality and performance of the later circuit board. In addition, when soldering tin on the core wire and shielding wire, it should be firm and even without burr.

3, solder joint connection, mainly connecting the core wire, requires firm, full and round. The connection shield wire, like the one above, needs to be round, firm and burr-free.

4. Adjust the clamping protector and installing the sheath, and then install the connector tail, thus completing the welding of the video connector.

? Second, the audio joint welding

1. It is necessary to peel off the sheath. Note that the peeling time should be longer to facilitate the follow-up operation.

2. Spot weld the stripped wires in turn. The main objects of solder joint connection are core points and shielding points, which require firmness, roundness and fullness. The solder joint connection of shielded wire should be round and firm, without burr.

3. Adjust and clamp the protector, adjust and install the sheath, and then install the tail.

? Third, the gun head welding

Gun heads are also common in connector welding. Three-core gun heads are commonly used, which are divided into balanced connection and unbalanced connection. Balance method is that two signal lines transmit a pair of balanced signals. Because the interference of these two signal lines is the same and the positions are opposite, the interference will be cancelled in the end. Therefore, this method is also considered as an anti-interference connection method, which is widely used in professional equipment.

1. Remove the shell of Canon with a small electric pen first, then take out the weldment, and pay attention to distinguish the stitches.

2. It is required that the solder joint between the core wire and the shielding point is firm, full and round when tinning, and the solder joint of the shielding wire is firm, burr-free and round when connecting.

Fix the cannonball with a small electric pen, and it's over.

In addition to the welding of the above three kinds of connectors, there are welding of three-core plug-in to double shower head, serial port head, three-core power plug and socket.