Replacement of rectifying diode
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Replacement of rectifying diode
After the rectifier diode is damaged, it can be replaced by the same type of rectifier diode or other models with the same parameters.
Generally, the rectifier diode with high voltage withstand value (reverse voltage) can replace the rectifier diode with low voltage withstand value, while the rectifier diode with low voltage withstand value cannot replace the rectifier diode with high voltage withstand value. The diode with high rectified current can replace the diode with low rectified current, while the diode with low rectified current cannot replace the diode with high rectified current.
Inspection method
First, remove all the rectifier diodes in the rectifier, use 100 × R or 1000 × r ohm gear of the multimeter, and measure the two outgoing lines of the rectifier diodes (the head and tail are adjusted once respectively). If the difference between the two measured resistance values is very large, for example, the resistance value is as high as several hundred K Ω to infinity, while the resistance value is only a few hundred Ω or even smaller, it indicates that the diode is good (except for the diode with soft breakdown). If the resistance values measured twice are almost the same, and the resistance values are very small, it means that the diode has been broken down and cannot be used. If the resistance of both measurements is infinite, it means that the diode has been internally disconnected and cannot be used.