Expert: Dave Hathaway - 7/20/2006

Question
i have a panasonic home theater system model no. SC-HT730 , if someone uses 220V powersupply with it what will happen and what can be done to repair it ? do they have inbuilt fuse to save the system if anything like this happen?

Answer
Hello Charu,

I am assuming that your Panasonic SC-HT730 is a model designed for operation on 110VAC rather than 220VAC.  The most likely damage to the unit by running it on 220VAC is to the power supply. Any power transformer was probably damaged and will need replacement plus a number of other power supply parts could also have been damaged. There may, of course, be an internal fuse in the power supply circuit that was blown out when the over-voltage hit it.  If that is the case, there may not be as much damage.  If the unit smoked and smelled like it was burning, the damage is probabaly more severe. Many of the circuits beyond the power supply could also have damage.  Solid state components do not handle over-voltages well so damage can quickly occur.

About all I can recommend is that you take it  to a repair shop and see if they can provide an estimate of what repairs will cost.

Hope this gives you food for thought. If so, and you have more questions, just come back in with a follow up.

Dave