The electronic structure of standing fan is not so difficult it's just that they are made with precision factory setting and everything is well calculated to make it spin as a fan. And of course nothing last forever including the standing fan has no exception that eventually it will stop working someday. When it happen you may think off whether to dispose it to the garbage or get it fixed to work again.
In the process of fixing the fan fault we need to understand the basic electronic components that drive the electricity to spin it and with that the knowledge in mind we can diagnose and fix where the exact faulty components.
Some of the basics
1. The cable/wires - Using a multimeter to test the continuity, which means testing the loop of the electric power flow to make sure there is no broken path somewhere in between. Usually the fan cable is tough and rarely get faulty but one in a million cases it is possible that the wires might be cut off probably bitten by rats or due to pulling excessively.
2. The capacitor - another important component to understand is the capacitor which drives the motor. If the capacitor is faulty then the fan also be stop spinning. To check if the capacitor is good or bad, use a 9 volt battery to charge it for 30 seconds or 1 minute. Then use a multimeter to check the voltage if the charges run go up to 10 volts or so within the time frame it is charged most likely the capacitor is good. Otherwise if it doesn't charge at all, its bad. Secondly check if there is bulging shape of the capacitor which indicate it might be faulty otherwise if it is in perfect.
3. Check the thermal protector - a small tiny electronic component that act as fuse to protect the fan motor from exceeding certain heat limit. If the heat of the fan motor reach a certain heat specified on the thermal protector it will automatically turned off the fan. When this tiny component gets faulty it will prevent the fan from turning on. To test if this is the cause of the fault, take a wire and connect the two pin of the thermal protector and switch on the power. If the fan spin when connecting the two pin it means the thermal protector is faulty.
4. The winding coil - this is the most difficult part to detect sometimes because we can only check the coloration of the winding coil. Usually black coloration somewhere on the coil indicates the motor is burnt.
While the cable, capacitor, and thermal protect can be fixed or replaced by ordinary man but the motor repair requires expert as you won't be able to understand how exactly it is made. If the motor is faulty then it's better to dispose the fan and get a new one - because re-winding the coil is a tedious work for an ordinary man and expensive if you take it to the experts.
diagnose faulty stand fan, stand fan motor start capacitor faulty, cause of stand fan stop spinning, stand fan faulty thermal protector, stand fan burnt motor, stand fan cannot turned on