Don't Miss

Could A Smps Transformer Breakdown When Under Full Load?

By on April 2, 2008

smps transformer

Last week there was a Panasonic kxp1131 printer sent for repair and the problem was no power. After checking all of the components, i found power fet K2651, power IC KA7552 and a  low ohm resistor (.75 ohm) burnt. As usual, i do not direct switch “ON” the power until i have tested the surrounding and the important components. Everything looks okay to me and the moment i powered it “On” i could hear a ‘bang’ sound and the same components turned bad again. Since the customer want the set back fast i do not have the time to really examine it. I hope it was not the smps transformer that breakdown when under full load. So far i have never come across one, perhaps if you have ever came across one, you are always encourage to give a comment-thanks!



  1. Tim Terzich

    November 10, 2008 at 2:57 pm

    What would make the SMPT transformer make a clicking sound?
    No picture power light on and off with the transformer sound. I paid a fee at a website but no help.

  2. admin

    November 12, 2008 at 8:23 pm

    Hi Tim,

    Some components shorted at the secondary side could cause the sound. Clicking sound also can be come from a relay where the cpu output a continous pulse signal to transistor to turn off/on the relay.



Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.