66
S
ERVICE
P
ROCEDURES
C
ORRECTING
S
TOP
B
UTTON
L
ID
C
LOSURE
P
ROBLEMS
One relay is "Normally Open" (NO), the other is
"Normally Closed" (NC). The circuit is shown below.
When the lid is closed the magnet must be in a position
to align with the reed relays on the cover. This align-
ment allows the circuit to close and the robot to
operate.
When the lid is open, the circuit is open, preventing the
robot from operating.
When the lid is closed and pressed down, the roles of
the two relays are reversed and the circuit is open,
preventing the robot from operating.
If there are problems with the lid closure, run a service
test. Select
Service > Tests > Lid
from the service menu.
9.15.1 Relays
The pairs of relays must be installed one above the
other in the correct order:
NO must be on top.
This relay is identified as having the
digit “1” in the reference number.
NC must be on the bottom
. This relay is identified as
having the digit “4” in the reference number.
NOTE: The reference numbers are etched on the
surface of the relays.
The relays are supplied as an assembly. The assembly
contains two pairs of relays and the cabling between
them.
When installing replacement magnets and relays, visu-
ally examine the position to ensure correct alignment.
Run the service test to ensure the relays correctly align
to the magnets. Select
Service > Tests > Lid
from the
service menu.
9.15.2 Magnets
Assemble the magnets to the lid at the positions shown
in the figure below.
The magnets must be at the correct height so that
when the lid is closed or pressed down they connect
with the correct relays. If necessary, spacers must be
placed behind the magnets. Run the service test to
ensure the magnets correctly align to the relays. Select
Service > Tests > Lid
from the service menu.
1 – Relay (NO - normally open)
2 – Relay (NC - normally closed)
NO
NC
1
2
NO
NC
NO
NC
1 – Magnets
1
1
DRAFT
05-23-2019
