Sign in to follow this  
Followers 0

Class I amp or I guess so

2 posts in this topic

I'm not sure if I'm breaking the forum rules and I hope I am not. I have four units of JBL PRX518S over my workbench for servicing and I know is a CROWN design so I dare to post here in case anybody can give me some ideas or advice.

The thing is that I have found some of the final switching Qfets broken, I have removed them, and to check if there's nothing else broken, I turned it on before installing the new devices, but the power supply is generating a lot of noise as if there was already something wrong. I am getting into these new technologies but experience is at its weak, so I don't know if there could be a problem, which I can't find, by connecting the module (unloaded, of course) without the Fets.

On the first repair, I mean the first module I tried to fix, after I replaced the defective Qfet I turned it on and a few seconds after the power supply literally explode, so I am very worried about going ahead or not. I know that other technicians are simply (it is not the word I'd like to use) replacing the whole thing, but I refuse to throw this away, there is a lot of technology and I believe it can be fixed.

Looking for your help.



Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  
Followers 0