What should I pay attention to when repairing the calculator? You should know that there are field effect components in the calculator, and a slightly higher AC induction current can also damage it. Note that the temperature during the baking and soldering process should not exceed 45 degrees; in addition, when repairing the broken LCD screen, be careful that the paper soaked in carbon ink will erode along the broken cracks of the LCD screen and cause joint writing. Once such a situation occurs, wipe it with an alcohol cotton ball immediately; the surface of the LCD screen cannot be wiped with alcohol to avoid being dissolved by alcohol. Also, the conductive rubber effect cannot be soaked or wiped with alcohol for a long time. Everyone should know that although the performance and brand of each computer are different, their structure is basically the same, and the maintenance methods are basically the same.
What are the most commonly used repair methods for calculators?
One, cleaning and drying
Cleaning is an indispensable step to repair the calculator. This step is mainly to eliminate all kinds of failures caused by the anvil dirty, affected by the anvil, and moisture. At the same time, cleaning can also extend the service life of the calculator.
Second, counterpoint, reload
Common causes of calculator failures are also misalignment and looseness. In this case, we can adjust the positions of the LCD screen, conductive rods and printed circuit boards to restore them.
Three, rust removal and plastic surgery
The metal components in the calculator are prone to oxidation, corrosion, insufficient elasticity and deformation. In the process of repairing the calculator, it must be derusted, cleaned, and reshaped to ensure reliable contact between the components and normal electrical conductivity.
Fourth, the battery
The use of inferior batteries and batteries with nearly exhausted capacity will also cause the calculator to function abnormally, and normal operation can be restored as long as it is replaced with a new battery.
Five, printed circuit board
The printed circuit board in the calculator is made of copper plate, which will be affected by high temperature or humidity, which will make the insulation performance worse. Over time, the circuit board may open circuit or short circuit or oxidize, etc. After repairing the board, it will generally be You can return to normal use.