Tightening
the suspension on your tonearm
Some
TT's have tonearms which seem to be loose. If you grab the tonearm
and pull it gently back and forth and it seems loose you can tighten
it. It shouldn't move at all. A loose suspension can severely
affect it's performance - from jumping needles to binding.
It's pretty easy to tighten the suspension. You'll need a small
flat screwdriver and a large one. Use the large one to loosen
the outer locking screw on the top of the pivot point. Now use
the smaller screwdriver to loosen up the smaller screw. Put
a drop of oil where the bearings are (under that top support
on the other end of the adjustment screw) so that it doesn't
bind. Now tighten the small screw slowly until it just contacts
the bearings. Adjust the tightness so the tonearm doesn't wiggle
if you pull on it but leave it loose enough for the tonearm
to pivot freely without binding. Adjust carefully and don't
overtighten otherwise the bearings will be damaged! When done,
tighten up the locking screw.
Tightening
up the headshell locking ring
Have
you put on your headshell, twisted that knurled tightener at the
end of the tonearm as tight as possible and have found that the
headshell still moves around? What will happen is that the headshell
won't sit parallel to the record but may be tilted as a result
of twisting of the headshell. This usually occurs when you change
headshells a lot or if you've had your turntable for a while,
and can contribute to needle jumping so here's what you do to
fix it.
First read on base disassembly.
Remove the rubber base. There will be this big piece of hard
black plastic covering almost everything. You'll need to remove
it. To remove the tonearm assembly look for three screws (all
formerly under that black plastic) and unscrew them. Be careful
not to drop the tonearm when you remove that last screw!
Now, remove the tonearm assembly from the rest of the 1200,
and look at the bottom of the tonearm where the headshell is
put in. There will be two tiny philips screws there. Get a jewelers
screwdriver of the CORRECT size and tighten those up. Put the
headshell on and try wiggling it to make sure everything is
right. Now put your tonearm back on and close everything back
up.