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In my model, servos 3 and 5 move even when the stick buttons are pressed
or when the rocker switch for servo 9 is actuated.
Cause
Tamiya special function is switched
on.
Solution
Switch off the Tamiya special function,
see section 3.6 "Switching the special
function for Tamiya model trucks and
tanks on and off" on page 58.
SMART SX FLEXX
What to do if?