A calculator is a sophisticated electronic device. The internal components are fragile, and a little carelessness can cause damage. Therefore, you must be familiar with the performance of the machine, pay attention to the impact of environmental conditions, and pay attention to correct use and maintenance. As long as we follow the following precautions, we can greatly extend its service life.
Prevent violent vibration, drop damage and heavy pressure. When the calculator is subjected to violent vibrations, the fasteners-screws will loosen, the mechanical contact reeds will be easily damaged and deformed, the glued parts will be degummed, the sound contact will be poor, or even short-circuit. Especially the display is made of glass, which is easy to break. Regardless of whether it is transported, stored or used, it should be paid attention to.
If the Ni-F battery is charged with an AC converter, the charging time should not exceed 15 hours. Because too long charging will shorten the life of the battery. When charging, the calculator should be suspended. After the calculation work is over, the switch should be set to “OFF” to turn off the power supply. If the calculator is left unused for a long time, the battery must be taken out to avoid damage to the calculator due to battery liquid.
If the calculator fails and the repair conditions are not available, please go to the repair department for repair. If the repair conditions are available, the electric soldering iron and various maintenance equipment must be reliably grounded to avoid leakage and breakdown of the integrated circuit. When welding, disconnect the power of the calculator. At the same time, do not use corrosive flux (use alcohol to dissolve rosin instead of flux).