Section 4 • Repair Procedures
REV B
November 2005
4 - 2
GR-12 • GR-15 • GR-20
Part No. 84700
The platform controls, used to operate the machine
from the platform or while standing on the ground,
can also be used to tune the performance of the
machine.
Moving the joystick or activating a button sends a
signal to the Electronic Control Module (ECM).
When the ECM is in the function mode, the
platform controls are used to operate the various
machine functions. When the ECM is in the speed
tuning mode (PS is shown in the diagnostic display
window) or software configuration mode (SC is
shown in the diagnostic display window), the
platform controls are used to adjust the function
speed parameters or the machine configuration.
The platform controls consist of an electronic
circuit board, joystick, alarm, buttons and LEDs.
For further information or assistance, consult the
Genie Industries Service Department.
1-1
Circuit Boards
How to Remove the Platform
Controls Circuit Board
1 Push in the red Emergency Stop button to the
off position at both the ground and platform
controls.
2 Remove the retaining fasteners securing the
bottom to the platform control box. Open the
control box.
3 Remove the ties securing the wire harness.
4 Remove the alarm and red Emergency Stop
button from the platform control box.
5 Carefully disconnect the three wire harness
connectors from the platform controls circuit
board.
Electrocution hazard. Contact with
electrically charged circuits could
result in death or serious injury.
Remove all rings, watches and
other jewelry.
Component damage hazard.
Electrostatic discharge (ESD) can
damage printed circuit board
components. Maintain firm contact
with a metal part of the machine
that is grounded at all times when
handling printed circuit boards OR
use a grounded wrist strap.
6 Carefully remove the platform controls circuit
board retaining fasteners.
7 Carefully remove the platform controls circuit
board from the platform control box lid.
Platform Controls
a
joystick controller JC1
b
alarm H1
c
platform controls circuit board U3
d
red Emergency Stop button P2
d
b
a
c
