Cambridge Audio azur 351a buzzing sound in phones?

hi there is a buzzing sound in the phones input on the right side of the headphone in my Cambridge Audio azur 351a I tried on and off the direct button but the buzz is still there, when I tried it on my Denon DCD-510AE phones input the buzz is gone.
Is buzz consistant and same with volume changes or it gets quiet or louder?
Headphone jack if used frequently, may develop damage in soldered wire connections. Reapplying a new solder may solve issue.
Hi the buzz is consistent and same with volume change.
That is obviously a problem of the headphones output, most of the times built with cheap materials on such units(just a simple add on)