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Equipment description
P1509 21 x 125 Line Matrix
18
Front Access Full Matrix LED Sign Maintenance Manual (pn 1507610501 rev. A)
Inside view — 1.35-inch pitch sign
Figure 8.
Internal components of a 1.35-inch sign
Item
Name
Description
A
INTAKE FAN (FAN #4)
Draws in air from outside.
B
HEATER #2
Used to control humidity inside sign.
C
AIR FILTER COVER
When removed provides access to fan air filters.
D
CONTROLLER PLATE
Mounting sub plate for controllers, outlet, fan monitoring board, and fan/heater control
relays.
E
POWER PANEL #3
Convert AC power from load center to DC power.
F
POWER PANEL #2
G
POWER PANEL #1
H
HEATER #1
Used to control humidity inside sign.
I
INTAKE FAN (FAN #1)
Draws in air from outside.
J
LIGHT SENSOR #0 — FRONT
The address number of a light sensor is set via SW1 and is the same as the light
sensor number. To replace light sensor board, remove the four nuts attached to the
mounting plate.
K
LIGHT SENSOR #1 — TOP
L
LIGHT SENSOR #2 — BACK
M
EXHAUST VENT (FAN #2)
Vents hot air inside the sign to the outside.
N
EXHAUST VENT (FAN #3)
O
LOAD CENTER
Principal AC power for sign. 120VAC 15A service required.
A
B
D
F
E
G
H
C
C
M
C
C
I
N
O
J
K
L