February 2022
Service Manual
Platform Controls
Part No. 1314708GT
GRC
™
33
8 Carefully disconnect all wire harness
connectors from the platform controls circuit
board.
Electrocution/burn 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.
9 Carefully remove the platform controls circuit
board fasteners.
10 Carefully remove the platform controls circuit
board from the platform control box.
11 Remove the transparent caps from the
platform controls circuit board and save.
Circuit board fastener torque specifications
Hand tighten until screws seat
< 5 in-lbs
< 0.6 Nm
Note: Before installing a circuit board, place the
transparent caps removed in step 11, over the
circuit board buttons.
Note: After installing the circuit board, check for
proper button operation. Excessive torque of the
circuit board fasteners will cause the buttons to
bind. Moderate torque of the circuit board
fasteners will not allow the buttons to engage.
1-2
Joystick
How to Remove the Joystick
1 Push in the red Emergency Stop button to the
off position at both the ground and platform
controls.
2 Disconnect the platform controls from the
control cable at the platform.
3 Remove the fasteners securing the platform
control box to the platform control bracket.
4 Remove the fasteners securing the bottom
cover to the platform control box. Open the
control box.
5 Remove the ties securing the joystick wire
harness.
6 Carefully disconnect the joystick wire harness
from the platform controls circuit board.
Electrocution/burn 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.
7 Carefully remove the joystick fasteners.
8 Carefully remove the joystick from the
platform control box.
Torque specifications
Joystick fasteners
9 in-lbs
1 Nm
Summary of Contents for Genie GRC-12
Page 113: ...February 2022 Service Manual 101 Electrical Schematic GRC Options...
Page 115: ...February 2022 Service Manual 103 Electrical Schematic GRC from GRC11 1000 to GRC11 1078...
Page 118: ...Service Manual February 2022 106 Electrical Schematic GRC from GRC11 1000 to GRC11 1078...
Page 119: ...February 2022 Service Manual 107 Electrical Schematic GRC from GRC11 1079 to GRC14 1780...
Page 122: ...Service Manual February 2022 110 Electrical Schematic GRC from GRC11 1079 to GRC14 1780...
Page 123: ...February 2022 Service Manual 111 Electrical Schematic GRC from GRC14 1781 to GRC15 2343...
Page 126: ...Service Manual February 2022 114 Electrical Schematic GRC from GRC15 2344 to GRC16P 2481...
Page 127: ...February 2022 Service Manual 115 Electrical Schematic GRC from GRC16P 2482 to GRC16P 2562...
Page 130: ...Service Manual February 2022 118 Electrical Schematic GRC from GRC16P 2563 to GRCP 5999...
Page 131: ...February 2022 Service Manual 119 Hydraulic Schematic GRC from GRC11 1000 to GRC12 1168...
Page 135: ......