HN866 type holmium laser treatment instrument circuit diagram

One-piece inductor

The figure shows the circuit diagram of the HN866 holmium laser treatment instrument. In the circuit diagram of Figure 1, the AC220V mains is stepped down by the transformer B, and the ACIIOV voltage is obtained in the secondary. The voltage doubler circuit is formed by C1, C2, C3, D1, D2 and D3, and the DC high voltage of 4kV or more is obtained, and the excitation triggers the 氦氖 laser tube. It emits a red laser. Once the laser tube is triggered. The voltage on C2 disappears through the discharge of the laser tube. At this time, the voltage for maintaining the normal operation of the laser tube is supplied by the double voltage rectification composed of C1, C2, D1, and D2. Adjusting the RP can adjust the output current to be generally around 3mA~8mA.