Daily Archives: April 8, 2020

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Repair Voltage Regulator Control Circuit in Power Supply PCB Card

PCB AssemblyBy circuitwork April 8, 2020 Leave a comment

Repair Voltage Regulator Control Circuit in Power Supply PCB Card system, both the direct error sampling circuit and the indirect error sampling circuit belong to the voltage regulator control circuit, but there are differences in the error sampling method. Among them, by installing a sampling winding on the switching transformer, then a voltage can be…

Restore Switch Excitation Circuit in Power Supply PCB Card

PCB Board RepairBy circuitwork April 8, 2020 Leave a comment

Restore Switch Excitation Circuit in Power Supply PCB Card can greatly increase the efficiency of medical instrument PCB board troubleshooting; The switch tube, the positive feedback loop and the switching transformer can form a self-excited switch. This switching power supply is prone to malfunction in the capacitance and resistance existing on the positive feedback loop…