A
LPHA
X
PRESS
2020 RGB F
RONT
A
CCESS
F
ULL
-M
ATRIX
D
ISPLAYS
S
IGN
O
PERATION
AND
M
AINTENANCE
M
ANUAL
(PN 1523610201
REV
.
B
)
5-3
Part Replacement
5
S
IGN
CONTROLLER
REPLACEMENT
■
Sign controller replacement
Remove the sign controller
1. Remove power from the sign. Note there may be more than one power source present.
2. Open the sign. See See “Opening a sign” on page 5-1.
3. Turn the sign breaker to the OFF position. Note there may be more than one breaker in a sign.
4. Locate the controller board to be replaced.
5. Disconnect all cables from the controller board to be replaced.
WARNING
Hazardous voltage.
Contact with high voltage may cause death or serious injury.
Always disconnect power to unit prior to service.
Содержание AlphaXpress 2020
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