Origin Live OL Armboard installation on Technics SL1200 - Manual (Page 3)

Page 3
Pull off inner base moulding.
Remove the 3 screws holding on the Technics arm and then
the screw which fastens the black earth lead. The arm can
now be removed. You will need to re-earth this connection
and ensure that it makes electrical contact with the arm earth
wire or base of the arm if it is metal (wedging the strands of
wire underneath the arm base nut is the easiest method of
doing this.
If you have a newer 3 point arm base mounting then because
it is all plastic, you will need to either attach the earth to
the blue earth wire present on all Origin Live arms with an
internal rewire - the easiest method is to bare the blue wire
near the base of the arm and then twist the Technics earth
wire round the bared portion.
If you do not have a blue wire on your external arm cable
then attach a long length of wire to the technics earth and
attach the other end to your phono stage / pre-amp or Amp
earthing post.
If you still have hum then please note the following - When
we internaly rewire an arm then a seperate ground lead is
installed which enables easy connection of the arm to earth.
However for the OL1 without any modifications, the arm
earth is attached to the return signal of the left hand channel
i.e the outside metal of the black plug (at the other end - the
wire with the blue cartridge tag on the end). Try touching
the earth wire from the deck to the outside metal part of the
black phono plug with everything playing. If this eliminates
hum then you can splice into the arm cable for permenant
attachment.
Remove the outer base cover by pulling it off.
Remove the 6 or so brass coloured cross head screws
from the underside of the inner base moulding.
Mark the positions of these screws for re-insertion
as it is easy to forget the positions and get them
confused with other holes. Do not remove the 4
screws that hold on the hinges.