Ground Controls; Cpu Circuit Board - Genie TMZ-50/30 Service Manual

Section 4 • Repair Procedures
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Ground Controls

The ground controls contain 2 printed circuit
boards: the wire harness connector board and the
CPU/display board. On the exterior, membrane
switches, incorporated into an overlay decal, are
used to activate the various machine functions.
a
b
KS1
KEY
SWITCH
a
b
c
d
e
f
g
4 - 28
d
c
P1
D7
EMERGENCY
VOLTAGE
STOP
REGULATOR
SW25 SW25A
DIP SWITCH DIP SWITCH
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
g e
f
key switch KS1
CPU/display circuit board U22
voltage regulator D7
Emergency Stop button P2
DIP switch SW25A
DIP switch SW25
connector circuit board U21
7-1

CPU Circuit Board

The CPU circuit board controls all machine
functions.
How to
Remove the CPU 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.
2 Remove the four lid retaining fasteners from the
ground control box. Open the lid.
3 Tag and disconnect all wiring from the CPU
circuit board.
Component damage hazard.
Electrostatic discharge (ESD) can
damage printed circuit board
components. Use a grounded
wrist strap at all times when
handling printed circuit boards.
4 Remove the CPU circuit board mounting
fasteners and remove the CPU circuit board.
TMZ-50/30
June 2005
REV B
Part No. 65162