How to repair the common fault of Sony camera c 3 1 23 s wheel failure

There is something wrong with the tape cassette, that is to say, the mechanical device for putting dv tapes is broken, and there are gears and rotating guide wheels in it, so the whole device should be replaced. If you know electrical appliances, the mechanical device is not broken, but the cable between the mechanical device and the camera is broken. Because you didn't know which cable was broken, you changed the whole set of cables. This line is monopolized by Sony, and only self-employed repair shops have it outside, but it will not be sold to you at zero. If you can't do it yourself, you have to send it to Sony's special maintenance department to change it, but Sony's special maintenance department won't change the cable for you separately, but replace the entire tape bin. But there are three sets of cables in the whole tape warehouse, and two of them are definitely good, so there is no way to replace them. Pay attention to what will be returned to you. You can keep them. There are good cables in them, which may be useful in the future. I don't think Sony cameras should be repaired by self-employed people.