Hi, Will the krell kav 500i work on 220v 50hz supply? Thanks

If you're able to switch between them then your issue is possibly relay, relay driver or microprocessor related; all of which require a service techs attention. hope this helps. Gene

unless you have schematics and are gifted with a soldering iron, needs to be repaired.

Onsemi ( which is motorola) is a good pic for replacements If youre looking at the 21195 , then there must be a compliment to that as well? 21194 or 21196

Can you please provide more information about what you mean by "refresh"? Is there a performance problem or funcitonal problem with the unit?

Thanks,
Dan

Sounds like the volume was way up when the iPod turned on. iPods are DC and cause a sudden thump through the speakers when they power on.
If the fuse is not blown, there may be another fuse you have not seen. Most amps have three to five fuses especially a 150watt/channel like the Krell.

Check the Krell website

hi please check the wiring of the output it could be short or the speaker would be short or it could be the diode at the secondary supply that had short or capacitor disconnect the power supply ans check the OHMS of the transformer .or check the transistor could be stort

I can not respond to the warranty issues. My kitchen aid mixer is past warranty as well. I live in a country that uses 220V and my kitchen aid mixer is 110V. I have been using my kitchen aid mixer for almost 4 years with no problems at all.

The converter boxes are supposed to blow the fuse on the converter before it reaches your appliance and cause any problems.

If you purchase a 220V kitchen aid (although it would cost more money) it would probably have more power because of the higher voltage.

Hope this helps!

www.azmanual.com/manual/.../krell-kav-250-amplifier-manual

That is an extremely odd problem. I suggest finding a tech in your area who is familiar with the unit, or contacting krell directly.