JBL L110 Restoration

[lrb1951]

As you check the impedance across the connectors to the midrange it should vary from 0 Ohms to about 5.5 Ohms as turn the L-Pad. If no variance as you rotate the L-pad then you have a bad L-pad. The measured impedance across the input terminals of an L110A is about 5 Ohms. If the L-pad is bad, PM (private message) me.

Larry

 

[academia50]

I am intrigued to know how this topic continued, was the midrange speaker spoiled ?

 

[goldswimmerb]

I am intrigued to know how this topic continued, was the midrange speaker spoiled ?

No actually, I've been backed up with school, but it would seem either the L-Pad has a bad connection or someone screwed up the solder connection and bridged something.
Probably going to have to deconstruct these to figure out.

 

[goldswimmerb]

As you check the impedance across the connectors to the midrange it should vary from 0 Ohms to about 5.5 Ohms as turn the L-Pad. If no variance as you rotate the L-pad then you have a bad L-pad. The measured impedance across the input terminals of an L110A is about 5 Ohms. If the L-pad is bad, PM (private message) me.

Larry

So I got it working finally.
Turned out to be what I think is a cold solder joint in the crossover. I just started poking around on the upper section and noticed my resistance drop to where it should be. I then pushed down on one of the reistors (the large white ones) to make them flush with the cabinet, since they seem lifted and viola! Didn't even need to solder, or pull the crossover out, although I probably should just to make sure that the midrange doesn't do that again. Would guess it's a bad solder?

 

[lrb1951]

I would resolder those joints. Those resistors probably shouldn't be close to the cabinet. They are designed to dissipate heat and should be out away from the crossover base.

Larry