IIci dead speaker

[elemenoh]

This IIci speaker is non-functional. A known-good speaker from a SE works okay when attached. Reflowing the joints for the voice coil wires to MLB connection wires didn't help. Neither did spraying the connector with contact cleaner. The voice coil wires seem like they're attached okay. Is there anything obvious to try before tossing it?

 

[ymk]

Measure the resistance.  It's not worth risking the audio circuit over a questionable speaker.

 

[elemenoh]

@ymk It's showing OL on this speaker, but I get a good reading on the SE speaker. Does that indicate a break in the voice coil? If it's beyond repair, is there a modern replacement with the same dimensions I could swap in? The SE speaker is fine, but it'd be nice to replace it with a speaker of the same dimensions / specs.

 

[ymk]

It's showing OL on this speaker, but I get a good reading on the SE speaker. Does that indicate a break in the voice coil?

Probably.  I don't know of any replacements offhand, but Mouser is a good place to start.

 

[kiag]

I can probably send you a IIci speaker. I have a busted up case with the speaker still in it. DM me if you need it. I’ll have to test it. Also, I might be a little slow because I’m going to be on the road a bit, but your profile says CA, USA. I can send it to you US Mail later in the week. 

 

[techknight]

Yea open voice coil. 2 possibilities. one, the glue becoming acidic as it breaks down, could have corroded and opened the coil. Two, when the caps went bad the speaker saw DC and opened the coil .

either way, the speaker is blown and now junk.