I joined the Yahoo Group VX-170. This fix is from them. Someone that
did it said it was easy.
Fix for low audio on VX-170 by KE7FFM (10-22-06)
" I opened up the case and found a small peice of teflon tape covering
the hole on the inside of the front case half that is for the mic. I
simply removed the tape (small, round, and white) and put the radio
back together.
The mic seals to the edges of the hole, so I would think that if the
radio gets wet, the mic element itself would be the only component
that could possibly be damaged.
The change in
tx audio levels/mic sensitivity has been great, I would
recommend this to anyone who doesn't need the radio to be completely
waterproofed.
1} Remove the battery and the 2 screws below the battery
2} Remove the volume and chanel knobs, may need to carefully pry up on
them with a small flat-tip screwdriver.
3} Remove mic-plug cover and the antenna
4} Remove the rubber gasket from below the antenna and mic plug
5} On both the antenna port and the volume/channel control are chrome,
sealed, retainer nut, carefully unscrew using a small set of pliers, as you
will probably not have the correct size spanner wrench. There are O-rings
on and under these retainers, so be careful, you may wish to lubericate
with a light oil when re-installing later.
6} Seperate case halves by pulling down and out with the back half.
this should now come apart very easliy, watch out for the battery lock
clip, as it will come off and fly away!! This is the only real "gotcha" to
the whole procedure, so work over a large towel or carpet on a large
clean table or such. It is easy to put back, but hard to find if you
lose it!! (Yes, I lost it when I did it, took me an hour to find it!)
7} There are no wires or sub-boards to be worried about when the case
comes apart. It is really a very nice, clean assembly. The round white
teflon tape that covers the mic hole is easily visible, and easily removed.
8} Just go in reverse to re-assemble. again, lubricating the O-rings
(lightly) will help them to go back into place without damage to their seal.
There is also a rubber seal that goes around the case halves. So when
putting the 2 halves back together, the back half has two small tabs
at the top that will ned to be aligned with the matching slots in the top of
the front half.
Because of the gasket, you may need to keep a small amount of pressure on
them to keep them held together during re-assembly. Use your free hand to
replace the battery locking clip, then with that same hand clamp the bottom
of the halves together. Then you can use your first hand to install the
screws into the back, or get the aid of a helper with that part. Then you
can replace the retainer nuts and knobs."