Rework Full Bridge Rectifier Circuitry in Medical Electronic Instrument PCB Repairing.
The input voltage in the full-bridge rectifier circuit is 220vac, and the output is 300vdc, which not only changes the current, but also changes the form of current, but during the power up process, full-bridge rectifier diodes are easily damaged.
After any full-bridge rectifier diode fails, the entire bridge stack needs to be replaced.
In addition, there are 450V withstand voltage electrolytic capacitors in the power supply circuit board repairing. If the capacity of the capacitor is not enough, it will cause a series of failures, such as alternative current interference on the screen of the instrument, unstable computer system, etc.
