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I
NFRARED
M
AIN
S
YSTEM
U
NIT
10
STEP
1. Connect and test the
power supply. If it tests
OK, unplug the connector
from the power socket
and proceed.
2. Connect the Sensor/
Keypad cable the Sensor
input.
3. Test for shorts and
interference.
DESCRIPTION
A) Plug the supplied 12VDC power supply into an unswitched
100-240V AC outlet .
B) Plug the connector into the socket marked “Power” on the
MSU480.
C) If the Power LED does not light, test the unswitched
100-240V AC outlet with another appliance. If the outlet tests
OK, you have a defective power supply which must be
replaced for you to continue.
A) Strip 1/4" of insulation from the end of each wire. Tightly twist
the end of each wire until no frayed ends remain.
B) Use a small flathead screwdriver or your thumbnail to raise the
locking tabs, exposing the holes on the removable connectors.
C)Insert each wire into the appropriate hole on the removable
connector plug (Figure 6), and snap the locking tab down.
To help you, the connector plug is keyed. Insert the smooth
side of the connector plug into the smooth side of the socket.
Don’t force the scalloped side of the connector plug into the
smooth side of the socket.
A) Reconnect the power supply. If the Power LED lights and the
IR Test LED stays off, unplug the connector from the power
socket and proceed to Step 4. The following LED conditions
show a fault:
• If Power LED is Off there is a short between +12V and GND
• If IR Test LED is On or Flickers there is a short between DATA
and +12V or Interference is present.
Before you proceed to Step 4 consult the Troubleshooting
Section beginning on page 16.
DS00330ACN/MSU480 12/19/03 9:05 AM Page 10