Ground Controls; Circuit Boards - Genie S-105 Service Manual

Section 4 • Repair Procedures

Ground Controls

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 allow the boom to be raised above 10° with
the axles retracted and 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 and the machine will automatically
RECOVER
lower the boom to the stowed position in
sequence.
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.
4 - 58
7-1

Circuit Boards

How to Remove the LCD Display
Screen Circuit Board
1 Push in the Emergency Stop button to the
position at both the ground and platform
controls.
2 Remove the platform control box mounting
fasteners. Remove the platform control box
from the machine.
3 Locate the cables that connect to the bottom of
the control box. Number each cable and its
location at the control box.
4 Disconnect the cables from the bottom of the
platform control box.
5 Remove the control cable plug retaining
fasteners from the bottom of the platform
control box.
6 Remove the platform control box lid fasteners.
Open the control box lid.
S-100 • S-105 • S-120 • S-125
Component damage hazard.
Cables can be damaged if they
are kinked or pinched.
Part No. 102916
June 2011
REV A
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