Tue Apr 21 2009

The triac isn't turning on

I'm having problems with an Aloka SSD-500 ultrasound unit. I replaced a Triac and a bridge rectifier in the power supply but the triac was not an exact replacement. The power supply doesn't blow fuses anymore but the triac isn't turning on. Does anyone have a schematic for the Aloka power supply PSU-5500B? Any assistance would be much appreciated.

   RE: Ultrasound Systems Report Post
Tue Apr 21 2009Reply from WrenchGuy
avatar placemark
I can't recall seeeing a triac in a power supply that was not used for crowbar over-voltage protection, so that might not be your problem.

Report Post

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Please review our Privacy Policy for more details.
I Agree