Part replacement
P1509 21 x 125 Line Matrix
42
Front Access Full Matrix LED Sign Maintenance Manual (pn 1507610501 rev. A)
Fan replacement
➩
To replace a fan
1.
Open the sign. See “Opening a sign” on page 28.
2.
Turn the sign breaker to the OFF position.
3.
Locate the fan to be replaced.
Figure 35.
Fan locations
4.
Disconnect the wire harness from the failed fan.
5.
Loosen the four screws (circled) on the fan panel housing and slide the fan panel out of the panel slot.
Figure 36.
Screws securing the fan panel housing
6.
Holding the front fan guard secure against the fan panel, remove the two 6-32 nuts (circled) from the
top of the fan guard and remove the fan.
Figure 37.
Location of the 6-32 nuts on the fan guard
WARNING!
Hazardous voltage. Contact with high voltage may cause serious injury or death. Always
disconnect power to unit prior to servicing.
Exhaust fans
Intake fans (with heaters)
28x96 1.35-inch pitch sign (1507801101) shown.
See “Inside view — 1.07-inch pitch sign” on page 17
or “Inside view — 1.75-inch pitch sign” on page 19 for locations.