Hi,
just wondered if anyone has successfully been inside a Sennheiser ew100 G3
radio
mic.
http://www.thomann.de/gb/sennheiser_...FabLtAodI3AA-w

I've repaired quite a few G2 and G1 mics, these are relatively easy to
dismantle, and replace the SMD on/off tactile switch that usually gets
broken.

The G3 is different in that it has 2 x tiny T4 Torx bolts either side of the
sharkfin aerial you need to undo, to release the electronics.
Someone had previously had a go at these and partially rounded the heads,
and I found them extraordinarily difficult to remove.
I got one off, but I stupidly further damaged the other one, which will now
require drilling out as the Torx is now a rounded hole.


I phoned Sennheiser and spoke to a Service Tech.
Apparently these Torx bolts are glued in - he said so as to avoid cross
threading them, which I didn't quite understand, or perhaps misinterpreted.
You need to heat them up first, he said.

He further said that the on/off switch was not replaceable anyway, you need
to replace a whole section instead.
(This mic does not turn on)

I don't know why Sennheiser have decided to make these so difficult to
repair.
(But I can guess)


Now wise after the event, next time I get one in I will buy a proper T4
screwdriver.

I wasn't sure what size these screws actually are, just smaller than the
proper T5 screwdriver I have, so I bought a cheap set of ebay mobile phone
Torx drivers to find out.
These are jeweller type things, and too thin and soft to get enough torque
on these incredibly stiff bolts.
I shouldn't have attempted the removal of damaged bolts with this unsuitable
crappy tool, but was impatient. Doh!

I will also have to suss out a way of heating the bolts to soften the glue -
all around is plastic, so I though perhaps inserting the Torx screwdriver
into the head and heating the screwdriver blade?



Gareth.