Allmand Brothers MB 6200 - Manual (Page 59)

59
System Element Problem Probable Cause Corrective Action
Sign message
display
No sign message
displayed. Faulty power. NOTE: It will be
necessary to remove
Power connector from
the SBC. Measure
voltage between red (+)
and black (-) on power
connector. If voltage is
present but less than
+12 Vdc, see
Power
section of this
troubleshooting table.
All BRICKs have one
pixel illuminated. Faulty SBC Check for broken
wiring or loose
connection between
SBC and rail assembly.
Replace or repair, as
necessary.
Sign message
display, cont.
From a certain BRICK
beyond the SBC, the
remainder of the
BRICKs have one
corner pixel illuminated. Inadequate
connection of
BRICK or
Jumper BRICK
to bus bars on
mounting rail. Check for proper
attachment of BRICKs
at problem location on
rail assembly. See
Figure 3 for location.
See also
BRICK
Installation section for
additional information.
Faulty BRICK. Remove last BRICK
(furthest “electrically”
from SBC in the
placement on the rail
assembly) without a
corner pixel
illuminated and
interchange with
another BRICK (with
corner pixel
illuminated) on the
sign. If problem
remains, repeat process
with the closest BRICK
“electrically” to the
SBC that has a corner
pixel illuminated.