Equipment description
December 10, 2007
Front Access Full Matrix LED Sign Maintenance Manual (pn 1507610501 rev. A)
23
Sign power panels
There are three power panels in each sign. Each panel contains two 12VDC output power supplies.
Note:
Both power supplies may not turn on at the same time if there is not enough display load.
Figure 12.
Power panel components
Item
Power supply
label
Name
Description
A
Diode module
Part number 30300003LFSP or 30300002SP. See “Diode module
replacement” on page 37.
B
V+
12VDC +
DC output.
C
V-
12VDC -
D
DC output voltage
adjust
Adjustment range. Output should be set to 12VDC ±0.1V.
E
Input power indicator
Green = AC voltage supplied to power supply.
F
Signal connector
Used for remote control, remote sense, and power good signal.
G
AC in ground
AC input (90-264VAC, 47-63Hz).
H
AC/N
AC in neutral
I
AC/L
AC in neutral
DC output side
AC input side
Meanwell PSP-500-12
12VDC output power supply
(pn 40756302)
Meanwell PSP-500-12
12VDC output power supply
(pn 40756302)
Power supply DC output (front view)
Power supply AC input (back view)
B
C
D
E
F
G
H
I
A