Circuit Boards - Genie Z-80/60 Service And Repair Manual

September 2016
6-2

Circuit Boards

The ground control box (TCON) is the
communication and operations center for the
machine. The ground control box contains two key
switches. The key switch towards the top of the
control box is for selection of ground or platform
controls. The key switch at the bottom of the control
box is the Service Bypass key switch. It is used to
correct an out-of-level platform. If the machine trips
an envelope safety switch, the operator at the
ground controls can turn and hold the Service
Bypass key switch in the recover position, which will
automatically retract the boom and lower the
platform to the ground.
The ground control box contains a replaceable
membrane decal with touch sensitive buttons for
various machine functions. The ground control box
also contains two printed circuit boards:
The LCD (Liquid Crystal Display) circuit board is
mounted to the inside of the control box lid which
controls the LCD display screen or CAN Gateway if
equipped with a Tier IV engine.
The TCON circuit board is the main circuit board
for the machine. There are relays on the ECM
circuit board that can be replaced. All operating
parameters and configuration of options for the
machine are stored in the ECM memory.
Note: The ECM circuit board inside the ground
control box (TCON) cannot be replaced by itself. If
the ECM circuit board is faulty and needs to be
replaced, contact the Genie Industries Service
Department.
Note: When an ECM circuit board is replaced, the
proportional valves will need to be calibrated. Refer
to Repair Procedure, How to Calibrate a Joystick.
Part No. 1268556
Ground Controls
How to Determine the Revision
Level
1 Turn the key switch to ground controls and pull
out the red Emergency Stop buttons to the on
position at both platform and ground controls.
Result: The revision level of the TCON will
appear in the LCD display window.
How to Remove the LCD Display
Screen Circuit Board
1 Push in the red Emergency Stop button to the
off position at both the ground and platform
controls.
2 Remove the ground control box lid fasteners.
3 Open the ground control box.
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.
4 Carefully disconnect the LCD circuit board
ribbon cable from the ECM circuit board.
5 Remove the LCD display circuit board
retaining fasteners.
6 Carefully remove the LCD display circuit board
from the ground control box lid.
Service and Repair Manual
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