RB-985 buzzing

[jochie00]

I'm a proud owner of a Rotel RB-985 and RSP-976 since a long time.
I haven't used my equipment for a while and after moving I hooked everything up again. (220V - 50 Hz)

With all the speakers hooked up without the interlinks connected, the main amp is dead quite (except the slight hiss which has always been there)
When connecting to the pre-amp to either LF/LS amp or CC amp or RF/RS amp (the 3 are seperate inside) the speakers are still quite.

As soon as I hook-up a combination of left side with right side or centre, a buzzing noise comes out of the speakers. Buzz also occurs when I connect the grounds of the inputs together.

I also tried different pre-amps, interlinks and wall sockets.

Inside I checked the grounds and all connections are still intact

Would there be the remedy?

[Kevin D]

That's odd. So when different channels of the same amp are connected at the same time, you get a buzz. Have you tried it with nothing but the amp RCAs connected to the pre-amp?

I'm really at a loss, the amp should share the same ground between all channels. It should buzz or not buzz with only one cable connected.

Kevin D.

[jochie00]

Yes I tried it with nothing connected to the pre-amp and even took it in to my office to check if it was not something with the electricity in my house.

In whatever way I hooked up the preamp to main amp, even different interlinks only 2 channels but then hooked up to left and right amplifier bank in the main amp. the buzz keeps on coming back.
Also soldered new grounds inside the mainamp but that didn't help.

After I found out that the problem was still existing when I tried it in other buildings, I brought the amp straight to the repair shop.

So it is now waiting what they will find but I will keep you posted