LRx 5.1K Audison

[nonprof]

Hello!

Channel B right has a noise. I replaced OP AMP at the input stage but the noise is still there. if this opamp is removed the noise also gone. Any suggestion? thank you!

 

[motronix]

which OP Amp? from where did you move it?
is this OP Amp at the Input stage or Filter module? where?

 

[nonprof]

please see encircled opamp. There is noise coming out on that part...If I remove the opamp noise is gone. I already replaced this opamp from other side but the still there.

Only channel B right side has a noise. but music is not affected.

Thanks,
Armand

 

[motronix]

When you move out IC7 it move 7A & 7B. 7A is the RCA pre in 7B is the HI-Power pre in & buffer out 7A. is the noise is pops,hiss? move diodes D9 & D11 and see if the noise still there also try to check the capacitors around.

 

[nonprof]

Its hissing...I replaced some capacitors but still no luck.thank you.