20
MECHANICAL SERVICE
B:
IF THE PROBLEM IS NOT IN
THE HYDRAULIC CYLINDER OR
THE CONNECTING HARDWARE,
THEN PERFORM THE FOLLOWING
ELECTRONIC AND SOFTWARE
CHECKS:
9B-1: Turn the unit on. Move the treadles up and down
until they come to a locked position.
9B-2: If the treadles do not come to a locked position
within 2 to 4 steps, then position the treadles level.
Turn the power off. Wait 10 seconds, then turn the
power on. Move the treadles up and down until they
come to a locked position.
9B-3: If the treadles still do not come to a locked position,
then check the treadle center position on the encoder
PCB, as follows:
a) Remove the rear step. Enter diagnostic mode.
From the Intro screen, press [Speed UP] [6]
[ENTER]. The display will read “DIAGNOSTIC”.
b) Press the [Speed UP] or [Speed DOWN] keys
to scroll through the options until “TREADLE
CENTER” is displayed. Press [ENTER]. This will
release the treadles to allow them to be moved
by hand.
c) Slowly move the treadles up and down while
looking at the encoder PCB mounted in the center
of the dependency mechanism. There is a light on
the PCB. Note the position of the treadles when
the light on the PCB comes on. The treadles
should be parallel within 1 inch (2.5 cm) of each
other when the PCB light comes on (see Figure
B-1).
d) If the treadles are not parallel when the encoder
PCB light comes on, then the large encoder wheel
will need to be adjusted. Go to section C of this
section in the Service Manual to re-center the
encoder wheel. Be sure to verify that the large
encoder wheel is firmly fixed to the dependency
Figure B-1
