30 Owner’s Manual
Wanco® Metro™ Message Sign
c. A locking tab on the front of the photocell wiring connector keeps the connector
attached to the circuit board. Remove the connector from the board by pushing
the locking tab toward the connector, then pulling the plug sideways, away from
the board.
d. Remove the screws that hold the circuit board in place, then remove the board and
set it aside.
e. Insert the replacement photocell circuit board into place, attach it with the screws,
and connect the photocell wiring by installing the wiring connector to the board.
9. Repeat Step 6 for the both photocells, then:
a. If the photocell values on the controller screen change as expected, the new
photocells are correctly installed.
b. If the values do not change as expected, check the wiring connection at the
photocell circuit board.
c. If all wiring connections are secure and the photocells do not appear to be working
correctly, contact the factory (see Section 1.4, “Where to obtain service,” page 2).
10. When done, secure the controller and then close and latch the battery box.
5.3 Main terminal strip
If wiring connections at the main terminal strip inside the display cabinet are loose or
damaged, the message sign will not function properly. When instructed to access the
main terminal strip by a qualified Wanco service technician or by a troubleshooting
procedure, refer to Figure 5-2, page 29, and use the following steps:
1. Determine the location of the terminal strip inside the display cabinet by first locating
the wiring conduit entry point on the back of the cabinet. The conduit runs from the
computer box to the cabinet.
■ When facing the front of the display cabinet, the terminal strip is located immediately
to the left of the conduit opening, behind one of the sign’s display modules.
■ You must remove the appropriate display module to access the terminal strip.
2. Based on the location of the conduit opening, determine which display module you
need to remove.
3. Follow the procedures in Section 6.2.3, page 39, to remove the display module in front
of the terminal strip.
4. Examine all wiring connections at the terminal strip. If any wiring connections are loose
or damaged, repair if able or contact the factory for assistance (see Section 1.4, “Where
to obtain service,” page 2).
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