REV C
Section 4 • Repair Procedures
June 2005
Part No. 52075
TMZ-34/19
4 - 21
5-1
Ground Control Keypad
Circuit Board
The ground control keypad circuit board controls
the machine functions from the ground. The
ground control circuit board is connected to the
CPU circuit board via a ribbon cable.
TMZ-34 models manufactured in the 1998 and
1999 model years (from serial number T3498-001
to T3499-769) were originally equipped with
ground controls boxes containing three printed
circuit boards. Machine functions are activated
using push buttons on the exterior of the box.
Beginning with the 2000 model year (from serial
number T3400-001 to date), the ground control box
was changed to a two-board configuration. The
push buttons used to activate machine functions
on earlier models were replaced with a membrane
overlay decal, mounted on the exterior of the box.
The following procedure will not
apply for models manufactured in
the 2000 and later model years.
How to Remove the Ground
Control Keypad Circuit Board
1 Disconnect the battery pack from the machine.
Electrocution hazard. Contact with
electrically charged circuits could
result in death or serious injury.
Remove all rings, watches and
other jewelry.
GROUND CONTROLS
2 Remove the four lid retaining fasteners from the
ground control box. Open the lid.
3 Tag and disconnect the ribbon cables from the
ground control circuit board.
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 Remove the circuit board mounting fasteners
and remove the circuit board from the ground
control box lid.
Component damage hazard. Be
sure not to pinch the wires or
ribbon cable when installing the lid
onto the ground control box.
