Help me figure out what Im looking at here.

[Ender]

So here goes. I have decided to rebuild the crossover for a set of speakers I have here at the house as all the drivers work but the tweeter does not for one of them. After some research I found a schematic but I have no idea how to read it.

I am willing to learn all I can but I need a bit of guidance to get started. Originally I thought I would simply copy the working one but immediately got hung up on ordering replacement parts, because I cannot read the schematic.

Here's what I have so far.

The Schematic:

Picture of non functional xover (front)

and (back)

Maybe someone could help me out. This crossover doesn't look very complicated and seems to be a good one to start with. I figure if I can learn on this then redoing other speakers in the house could be next.

 

[lifer70]

You might want to recheck the schematic you have. The values I can read on the board aren't the same as what the schematic calls for.

 

[Ender]

...and you're right. Damned if I didn't click on the wrong manual. Turns out there is an 830 AND an 830T.

Here's the schematic for the 830's (non T) I own.

 

[cablephil212]

What I do see is the cap next to the .4mh coil (imo) has overheated. That would account for the sleeve to be shrunk like that, and possibly why the tweeter doesn't work. I would suggest a rebuild for the x-overs. You'll need a soldering iron and a hot-glue gun to secure the caps to the board.

Just an FYI, the new caps will be physically bigger. Take your time in fitting them on the x-over board. They WILL fit with some "creative" positioning. Do one board at a time, so the other can be used as a reference. When you're happy with the fit, hot glue and solder, in that order. It makes soldering easier when the cap is secured.

All parts from PartsExpress.

Parts to get:

(2) - http://www.parts-express.com/dayton-audio-dmpc-51-51uf-250v-polypropylene-capacitor--027-423. Replaces the 5.0 (and the .01) cap.

(2) - http://www.parts-express.com/dayton-audio-dmpc-18-18uf-250v-polypropylene-capacitor--027-434. Replaces the 17uf cap (close enough) and the .01uf combo.

(4) - http://www.parts-express.com/dayton-audio-dnr-20-20-ohm-10w-precision-audio-grade-resistor--004-20.

Normally, the inductors don't go bad, so I wouldn't change them out. They look OK, and don't look burnt (overheated), so I'd leave them as they are.

With some time, you should have these up and running. Post back after the repair. Let us know how things went, and how they sound.

Good Luck

Have Fun.