What problems should Tissot watch pay attention to?

First, check the exterior parts of the watch.

The appearance of a watch can be checked from the aspects of shell, mirror, dial, minute hand and second hand. The case should be free of sand holes and obvious scratches, and the edges and corners should be symmetrical; The screw connection between the back cover and the upper shell should be tight; The distance between the two bezel and the case is equal, and the hole for installing earrings should be centered on the tail of the case, and the depth of the hole should be appropriate, so that the bezel is not easy to fall off; The mirror should be free of defects and scratches, transparent and bright; The three pins are installed correctly, and there should be correct safety gaps between the pins and between the mirror and the dial; Dial and pointer plating finish is good, no spots, dial scale or luminous point is complete; There is a gap of about 0.1-0.3mm between the handle and the case.

Second, check the sensitivity of the watch.

The sensitivity of a watch refers to the flexibility of its balance wheel to swing automatically. The inspection method is:

1) Gently shake the watch that has stopped moving, and observe the movement of the second hand with the help of the shaking force: if the second hand stops moving in a short time, it means that the watch can completely move after being fully wound (that is, the spring has no torque), and the sensitivity is high; If the second hand keeps going for a long time, it means that the watch can't go all the way after winding (that is, the spring still stores torque), the sensitivity is not high or the watch machine is faulty.

2) For a watch that is not wound or stopped, slowly turn the handle to observe the start of the second hand: the less the handle turns, the earlier the second hand starts, which means the higher the sensitivity of the watch; On the contrary, the sensitivity is low or the instrument has other faults. However, it should be noted that, due to the greater stiffness of the hairspring, a fast-swinging watch needs a little more wind-up to swing than a watch with a traditional frequency (18000 times/hour). A watch with high sensitivity can go on for a long time after the last winding.

Third, check the spacing and position of the hands of the watch.

Keep a certain distance between the watch hands and the mirror, and between the dial and the three hands, otherwise they will collide with each other and affect the normal operation of the watch machine. When checking, you can observe it by pulling the needle. Check whether the position and mutual cooperation of the hour hand and the minute hand are normal: set the minute hand and the hour hand at 3 o'clock and 9 o'clock, and observe whether the two hands are at right angles; Dial to 6 o'clock, whether the two needles are in a straight line; Dial to 12, whether the two stitches coincide.

Fourth, check the watch winding mechanism.

The winding of an ordinary watch should be easy. When winding the handle, it feels very loose at first, and gradually it becomes tighter and tighter. When the handle can't rotate forward, it means that the spring is fully loaded and the winding mechanism works normally. Is there a "chirp" sound when turning the handle? Abnormal noise or sliding of the top teeth indicate that the winding mechanism is faulty.

Five, check the dial mechanism of the watch.

Watch should be flexible and reliable when setting hands, and the hands should rotate evenly. During inspection, the tightness of friction fit between the auxiliary wheel and the central shaft should be mainly checked. When setting the needle, if there is no feeling of looseness or tightness, it means that the wheel friction is normal and the oil quantity is appropriate. On the contrary, the needle fixing mechanism is faulty.