Owner’s Manual 39
Wanco® Metro™ Message Sign
6.2.3 Display modules
The display modules can be replaced when damaged or if LEDs fail to light.
Each module has an address, which marks its designated location in the display. All
modules are interchangeable, and their addresses are assigned by initialization.
Therefore, after replacing modules in the cabinet, initialization is required to ensure
messages are displayed correctly.
To replace a display module:
1. Follow the safety requirements in Section 2, page 3.
2. Identify the display module to be replaced, and remember its location.
3. Use the controller to “blank” the message sign.
4. Open the display cabinet door (which is hinged at the top and latched on the sides and
the bottom).
5. Remove the display module:
a. Identify the module and locate the four retaining nuts that hold it in place.
b. Using the supplied nut wrench or a 5/16-inch nut driver, remove the four nuts.
c. Carefully pull the display module away from the cabinet to expose the wiring
connections on back of the module. The wiring can be damaged if you use too
much force.
d. Being careful to avoid using too much force, first unplug the power connector on
back of the malfunctioning display module by pulling the connector straight out,
away from the module, then unplugging the data input wires by pushing the
locking tab down and pulling the plug sideways, away from the connector. Repeat
for the data output wires. (The lower-right module does not have output wiring.)
e. Set the module aside.
6. Install and initialize the new module:
a. Reverse the procedure to install the replacement module in place of the one you
removed.
b. Use the controller to access the display module diagnostics, then initiate the
message sign and start a new self-test.
c. After initialization is complete, use the controller to put a test message on the sign,
and ensure the sign is working as expected.
7. When done, close and latch the display cabinet door.
IMPORTANT!
You must have advanced- or service-level access to the controller in order to initialize a
replacement display module.
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