Classe Omega mono amp down

[eelii08]

Hi all,

Last week left home for a week away on vacation. Night before leaving I was listening to the system that was sounding as good as always and when I was done I unplugged the whole system from the wall mains, just in case some storm or similar while away.

Last night upon our return I plugged everything back again. Did not turn the system on as it was late and we had to unpack.

This morning I wanted to do some listening but one of the amps will not start. It is like if it was unplugged still. I push the button at the side but I get nothing. No noise, no lighting blue or red or anything. Just like if it was unplugged (but it is not...).

Change fuses from the working amp to the other but nothing. Also change power cords just in case and finally move the thing (ought) to some other wall plug of a different circuit, but nothing.

So not sure what else to try. Very disappointed since these things were one of the last they produced and is only a year and a half old. If I have to send these monsters for service is going to be a night mare. Any idea or help from anyone, of things i could try before sending? Contacted Classe but no reply still and my dealer is closed for 2 weeks summer break...

THanks

[AudioGremlin]

Do you know of a schematic on-line,? If so there may be some other basic fault-finding checks you could do. Hopefully it may only be a simple power supply problem.

[AudioGremlin]

Is the amplifier still under warranty? If so you don't want to invalidate the warranty. If no longer under warranty then fault finding power supplies is usually quite straight forward if you are technically aware.

[eelii08]

Yes they are still under the 2 year warrany period. I have very limited tech. Capabilities in electronics to say the least... Besides, will not be able to send it anywhere until september. So will not be able to do any listening in my summer vacations when you have a lot of free time..

From that particular amp, I got since day one a low pop out of the speaker when turning on right after pushing the button before the thing does the clicks it does when turning on. I was told that sometimes happens and that it was normal from the huge capacitors loading or something like that. Not sure if it is related. Did not give it importance since they sounded great. I think not related since for what I read a faulty capacitor does not produce the amp to go totally dead, but starts doing funny things with the sound and the likes, but the amp does turn on. But not really sure.

Was just wondering what kind of thing or failure can make the amp go totaly under, like if it was unpluged, and also if the were some easy checks or things I could do beyond the ones I have tried already.

Thanks

[AudioGremlin]

Some amplifier do make a slight speaker pop on either on switch on or if there is a surge delay relay (when it clicks in) .
One thought, when you tried the fuse that came out of the good amplifier, did in blow after being used in the faulty amplifier? If you can't tell by looking at the fuse you can test it with a meter set to measure continuity... or more simply you could try it in the good amplifier and check that the amplifier still operates.

[eelii08]

Haven't checked that, but will do now.

[eelii08]

That was a good question AG. Yes. Actually the fuse did blow. Now none of the amps will start and both are like dead. So the faulty one did blow the fuse and now I have to blown fuses. (tried both of them in the amp that is working but won't start at all).

Any thoughts?

[AudioGremlin]

Ok, first you need the correct value replacement fuse for the good amplifier, the handbook should have that detail.
The faulty amplifier is drawing too much current causing the fuse to blow, could be a component short circuit in the output stage or perhaps a component failure in the power supply. You'll unfortunately need a factory approved repair tech to investigate further. Sorry that I can't help you further as opening the amplifier would most likely nullify the warranty.

[eelii08]

Thanks for help. Is not looking like is going to be fast, no.

Strange how it happened. Was working just fine. turned all off normaly, amps, pre and sources last, and when I plugged back the system a few days later the amp never came back. Not like it broke when it was working or similar

[AudioGremlin]

The omega manual does state the correct replacement fuse and under section 5 advises a test if the mains fuse blows. Says to try a replacement fuse after disconnecting both the speaker and input connections. Obviously if it blows again you'll need an approved repair.
Replacement fuses should be able to be sourced easily.
Hope you are able to get the amplifier repaired quickly and without too much carriage expense.