Genie GS-3384 Service Manual page 88

Section 4 • Repair Procedures
PLATFORM CONTROLS
3 Locate the potentiometer on the base of the
joystick.
JC1
JOYSTICK
CONTROLLER
g
f
e
d
a joystick controller JC1
b potentiometer shaft slot
c potentiometer shaft set screw
d platform controls circuit board U3
e potentiometer
f brown wire
g purple wire
4 Using a volt meter set to read DC voltage, place
the voltmeter negative lead on the purple wire.
Place the volt meter positive lead on the brown
wire.
Electrocution hazard. Contact with
electrically charged circuits could
result in death or serious injury.
Remove all rings, watches and
other jewelry.
4 - 4
a
b
c
U3
PLATFORM
CONTROLS
CIRCUIT
BOARD
ON DIP
1 2 3 4 5 6 7 8
GS-3384
5 Loosen the set screw on the potentiometer
shaft just enough to allow the shaft to rotate.
6 With the joystick in the center or neutral
position, adjust the potentiometer shaft until
2.05V DC is displayed on the voltmeter. Tighten
the set screw.
7 Move the joystick full stroke in both directions
several times. Return the joystick to the center
position.
Result: The voltmeter should read 2.05V DC.
Result: If the voltmeter does not read
2.05V DC, repeat steps 5 through 8.
8 Turn the key switch to the off position.
9 Wait a few seconds and then turn the key
switch to platform control.
Result: The error indicator light on the top of the
platform control box should not be illuminated
and code 30 should not be present on the
diagnostic display.
Result: If the error indicator light is illuminated
or if code 30 is present on the diagnostic
display, repeat this procedure beginning with
step 5.
10 Turn the key switch to the off position.
11 Close the lid and install the fasteners.
September 2005
REV C
Part No. 82259