Crossover help?

A little late perhaps but here is how you do it.

Notice the last few pictures are the crossover upgrade. The last one is annotated with measured values and the wires that attach. There are also pictures of the original xo that I didn't post but are the same, multiple pictures including one annotated with all values and connections. Also in addition to this the parts were physically labeled, both the wires inside the speaker and on the boards. All the wiring is point to point and every part on the original was measured individually. This is how you do it when you want everything to work right the first time. 

If you take real clear pictures from different angles showing clearly all the solder joints we might still be able to figure this out. That is your best bet, because no manufacturer is going to do anything but sell you another crossover, and probably not even that. If you were making speakers and a customer called saying he screwed it up would you trust him to not screw up installing the replacement? I wouldn't. So figure it out and fix it.

If there is a circuit board then clear pictures of both sides. Circuit board traces are pretty thin, it is real easy to burn one out if you're not skilled at soldering. 

These are the photo OP posted on his system page, Seems like a simple two ways 2nd order xover with total 6 components.

The 3rd photo I believe is the original xover.

Based on the picture, I draw out the schematic:

1. Without tweeter connect to the board, use ohm meter test across the HF input terminals, it should be Infinite resistance.
2. Across the output terminals to tweeter, it should has a reading of about 3ohm or little higher ( 2.7ohm+DCR of the small inductor).
3. Ohm meter on HF negative input terminal to negative tweeter output terminal should has 0ohm reading.

Hope it helps and good luck 🤞

Thanks imhififan thats exactly what I was hoping someone could come up with.

Just checked the network as you suggested.

HF input terms OL

HF output terms starts at 0 climbs to 3.1

HF - to HF - 0.00

Surely its not possible the 3.3 cap stops that particular tweeter from functioning?

The new tweeters have just arrived but I can play with them until later this evening

Thank you to everyone who contributed to this thread.

The strangest thing happened.

After checking the network as per imhififan's suggestion I had to go out, came back and plugged in the network.

Working!! wft?

Replaced the 2R7 still works, installed 56R still works.

Bolted everything back together installed fitted new tweeter and we have music.

First impressions admittedly with only 1 side done, the overall sound seems more open, there is definitely more HF on the upgraded side but with less glare. I thought the + upgrade reduced treble by using the 56ohm (about 1db?) and lowering the crossover from 3 to 2.5k

I've had to postpone the other side as when I was checking R values the 2R7 (which was installed) gave some odd readings then the lead fell out!

I'm now going to have to wait for a replacement before tackling the other channel.

Shame as my job tomorrow's has just cancelled due to covid.

Thanks again for your help.

Ian

imhififan knows his stuff, I would check for possible shorts and clean all the flux off the boards so you can examine it closely, 91% works better than 70%. Maybe something like a frayed strand of wire or solder splatter creating an intermittent short.