Circuit Boards - Genie Z80/60 Service Manual

June 2011
REV B
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
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.
The ECM 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.
See 1-3, How to Calibrate a Joystick.
Part No. 88619
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 ECM 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
RECOVER
off position at both the ground and platform
controls.
2 Remove the ground control box lid fasteners.
Open the control box lid.
3 Carefully disconnect the ribbon cable from the
LCD display circuit board.
4 Remove the LCD display circuit board retaining
fasteners.
5 Carefully remove the LCD display circuit board
from the ground control box lid.
Z-80/60
Section 4 • Repair Procedures
GROUND CONTROLS
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.
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