Balance issues?


Hey all. I'm having this issue when I adjust the balance control on my Cambridge Audio Azur 740a all the way to either the left or the right, I am still getting signal out of both channels. I have checked my wiring a thousand times. 
When I hook up a different pair of speakers, same issue. When I reverse the wiring, same issue.
When I switch to my other older amp, balance works as it should. 
Is it possible there is a problem with the azur 740a?
When balance is at zero it sounds ok, maybe even in the middle. But I can't help but think it sounds under performed. I should mention I bought this amp used.
Thanks
128x128kevdubbya
Over all the preamps and integrateds I've owen, they always muted the other channel when the balance was at full turn to the other channel. Something's not right there. Could be the value of the balance pot is incorrect.
Be aware the balance is a menu item in the Azure 740a screen... and NOT an actual knob on this device. So it is not like ’all the rest’ of those balance knobs you are used to. It does use the volume knob, just like half dozen other functions you can scroll through.
On the other hand. In the ownwer’s manual, it DOES MENTION: "If you cannot hear from one channel, check the balance control". This may or may not mean anything, or the folks writing and the folks programming the balance function did not talk much.
Thanks for everyone's input. Going to get it looked at by my dealer in town. The balance knob is shared with the volume knob, after selecting volume or balance in the menu.