audison vr 203 problem.

[Gigispl]

hi guys, i have a problem with a broken audison vr 203.
I have replaced both pnp of the channels because the short, original mounts 2n6491 I have put some bd744c.
green led on the amplifier works, but as soon as I press the stereo / mono selector, or the sensitivity selector, a bump and amp in protection, on all op ne5532 I have positive and negative voltage 14v. rail 27v dual.

 

[Perry Babin]

That sounds like dirty contacts.

 

[Gigispl]

hi perry, how about cleaning the mono and sensitivity stereo button switches?

 

[Perry Babin]

That's where I'd start.