Carson BIG Hughes 500 Instruction Manual page 14

On the right hand side you
GB
attach the spring according to
picture 4. The spring adjuster
is mounted by using a Phillips
head screw and the spring is
put into the holder by means of
tweezers.
On the left-hand side of the
main board (Illustration 5)
there is a small connector,
which you must carefully
remove.
It is imperative that the board
is not damaged. Then undo
the screw to which the aerial
is secured (Illustration 6).
Now the main board can be
removed by means of the four
screws (Illustration 7).
14 CARSON Helikopter BIG Hughes 507021
Picture 5
Picture 7
Picture 4
Picture 6