Tannoy 632

Hi all,

I got a free pair of Tannoy's 632 I was told one tweeter had blown, ordered new one fitted it... and still nothing!! tested the tweeter on the other speaker all works ok.

Looking at the cross over (bloody hard to try and get inside) i can see 3 parts
Expotus 7w1.5ohmJ
9421 EVOX WWK
and the inductor.

How can i test which is at fault? and where can i buy new parts?
i have a volt meter... just never used it... only to test a connection.(bleep).

any help would be good

thanks