Now there are some children like to wear electronic watches, the use of electronic watches will appear in the process of some faults, if you see the child's electronic watch is broken how to repair it? Here is how to repair electronic watches I organized for you, I hope it can help you.
How to repair electronic watches
1, power failure: exactly the same as the pointer electronic watch routine detection methods, you can also press the lighting button S3 to light bulbs to check the battery. If the light is dim or flickering, or even not bright, it means that the power supply is faulty. If the battery has failed, it is necessary to replace the original specifications, type of battery. In addition, we should also pay attention to the electrode of the pole piece with or without corrosion and whether the installation position is correct.
2, the circuit board on the positive and negative battery input line is broken, short-circuit: using the multimeter's ohm gear, monitor the break or short circuit. If broken, short-circuit occurs in the integrated circuit near the chip, repair is more difficult, only to replace the new circuit board.
3, boost circuit failure: oscilloscope detection oscillator circuit, if there is an oscillating signal but the LCD does not display, the fault is mostly in the boost circuit. Generally the conventional method to detect the boost circuit, if the boost capacitor breakdown, we must replace the new capacitor; if the boost capacitor is normal, that is, the CMOS integrated circuit failure, need to change the circuit board.
4, conductive rubber failure: in order to routinely detect the circuit board's character stroke electrode output signals and public **** electrode signals are normal, the LCD screen is still not displayed, more than one conductive rubber failure. Conductive rubber failure has a small amount of compression, small axial dimensions, or plastic bracket deformation and pressure is not tight. Can be replaced with a larger amount of compression axial size slightly larger conductor rubber. If there are no accessories, can also be placed on the bottom of the LCD screen plastic frame pads plus tape paper.
5, moisture, sweat, dirt invasion of the movement: six-function digital electronic watch, the general case sealing is poor, moisture, sweat is easy to invade, or dirt into the circuit substrate and conductive rubber, and the LCD word electrode insulation resistance between the electrodes seriously decreased, resulting in a failure to display. This fault in the exclusion of the above aspects of a common failure. Practice shows that the vast majority of non-display is caused by this failure.
The repair method is to use anhydrous alcohol to wipe the parts, and after the parts are dried, reassemble.
The external factors mentioned above may sometimes only make the insulation resistance of the trimmer capacitor or fixed capacitor drop, and the loss angle of the capacitor increases dramatically, thus making the oscillation circuit not vibrate.
Repair method is to use a flannel dipped in a small amount of anhydrous alcohol wipe capacitance, or directly in the oven (or simple dryer) for baking (pay attention to the temperature is not too high), generally can be eliminated. In addition, fixed capacitors bonded with silver paste, after oxidation of the adhesive, resulting in decreased adhesion to fall off, can also form a non-display. This repair should first remove the silver paste residue, speak of fixed capacitance to tin welding.
6, the repair of human failure: the human body and maintenance equipment is not grounded, may cause electrostatic damage to CMOS integrated circuits. However, it must be noted that only in the confirmation of the quartz resonator, capacitors are normal, can be judged as CMOS integrated circuit damage. To determine the use of CMOS integrated circuits to be careful, because there are still many dense and fine wiring on the circuit board, whether there is a broken or short circuit failure, should be ruled out after the two line failure, and to determine whether the CMOS integrated circuit failure.
Sometimes when assembling the quartz resonator, there is too much heat, or too much bending of the pins, resulting in damage to the base and air leakage, causing damage to the quartz resonator.
The repair method is to use a new quartz resonator, not only the specifications, varieties, resonant frequency is the same, but also to rated load capacitance is the same, otherwise, even if the replacement of the new one, will cause timing errors.
7 LCD failure: the appearance of the LCD display should be a uniform color, no partial discoloration, no liquid crystal leakage and glass breakage, the two sides of the edge of the electrode part should be free of defects. Appearance is normal, and then the conventional detection methods for testing. Can also be tested on the LCD monitor installed in the good with the brand name of the table on the machine, to compare the method to detect. If it is damaged, it should be replaced with new parts.
Maintenance measures for watches(1) When wearing a watch, the sweat on the hands of the case is corrosive, all-steel case due to nickel-chromium alloy, corrosion resistance is better, semi-steel case is copper, long-term contact with sweat, easy to corrode, and should be often wiped with a soft cloth to wipe away the sweat or pad on the plastic watch tray to prevent it from being eroded by sweat.
(2) Do not open the back cover of the watch at will, so as to avoid dust entering the movement to affect the normal work of the watch.
(3) Do not put the watch in a closet with mothballs to avoid deterioration of the watch oil.
(4) Don't put the watch on the amplifier, stereo or TV to avoid magnetization.
(5) Long-term storage without wearing the watch, should be regularly wound up once a month, automatic movement of the watch should be gently swing back and forth for a few minutes or wear on the wrist for a period of time to make it automatically wind up. So that the parts are not in a static state for a long time to ensure that the running performance of the watch machine.
(6) ordinary mechanical watch by the tide, available dry cotton pressure on the watch, and then baked with a 40-watt light bulb for 5 minutes, the table in the moisture can be evaporated out. If the quartz electronic watch is damp, you can take a number of small pieces of calcium chloride, wrapped in gauze; and then open the electronic watch cover, will be wrapped in calcium chloride and the electronic watch and put into a non-leakage plastic bags or glass bottles, sealed. Generally about 3 hours can remove the moisture, so that the electronic table back to normal. For serious moisture table can be appropriate to extend the time of moisture absorption.
(7) received a favorite watch, remove the outside packaging, we must save the protection of the watch box used. These protective watch boxes can give the watch the safest protection when it is not normally worn, avoiding the watch from being broken or collided, so it is absolutely necessary to keep the box, and it is recommended that when you do not wear the watch on weekdays, you get used to putting it in the box, which can greatly reduce the chance of damage to the watch.
(8) Usually, it is best not to wear the same watch every day, and you should prepare a few different watches for alternate use, so that in addition to enriching your personal look, you can also avoid dust and body dirt all concentrated on the same watch. For the leather strap, more careful care, so as not to cause daily use of the strap of the regular wear and tear, then even if the surface of the new new, the watch will look very old.
(9) do not wear the watch on the wrist to sleep, if the watch is a luminous watch, it will bring adverse effects to the body. This is because the luminous watch pointer and dial coated with luminescent materials, mainly a mixture of radium and zinc sulfide, radium emitted rays can stimulate the zinc sulfide crystals luminescence, sleep, if you wear the watch, the human body will be subjected to radium radiation for eight to nine hours, the human body has a certain degree of harm. Therefore, before going to bed, it is best to take down the luminous watch and put it on the table.
(10) The watch cover is refurbished. After the watch is scratched out a lot of lines, you can put one or two drops of water on the watch, and then squeeze a little toothpaste to smear, you can remove the scratches and make the watch as new.