
Numeric Scoreboard
Maintenance and Troubleshooting
8-3
The digit lamp driver has 17 fuses. There is one fuse to protect each digit circuit. F1 through F16 are
located near each output connector under the driver’s metal cover. The lamp driver’s other fuse, F17
protects the driver’s logic circuit and fan. Refer to
Drawings A-123940
and
A-123941
for an
illustration of the driver and these fuses. Refer to
Section 8.8
to determine the part numbers for
replacement fuses.
8.5 Segmentation
Reference Drawings:
Digit Segments, 3x5 and 4x7....................................................................
Drawing A-46653
Segmentation, 4x7 Digit..........................................................................
Drawing A-143233
Interconnect Panel Digit Designation; FB Displays ................................
Drawing A-174754
In each digit, certain lamps always go on and off together. These groupings of lamps are referred to as
segments
.
Drawings A-46653
and
A-143233
show the segmentation of 3x5 and 4x7digits, including
the number of the connector pin wired to each digit segment and the wiring color code used in all
driver-to-lamp connections.
Some scoreboard models make use of an interconnect panel. For those scoreboards,
Drawing A-
174754
further illustrates segment designation and harness connections. Also located within this
drawing is a table listing the precise labeling of harnesses for connection to the interconnect panel and
the related driver.
8.6
Power On Self-Test
Reference Drawings:
Incandescent
Driver
Power Up Self-Test ...............................................
Drawing A-128283
Power Up Self Test On a FB-1424 .........................................................
Drawing A-128301
The scoreboard performs a self-test each time that power is turned on and the control console is
powered off or not attached to the scoreboard. If the control console is attached and powered on, the
self-test does not run and data from the control console is displayed on the scoreboard after a brief
period of time.
The self-test runs in three cycles or phases. The pattern of the self-test varies depending on the model of
the scoreboard, the number of drivers, and the type of digits.
l
Drawing A-128283
shows how the test pattern displays in the digits when the address (P25)
and protocol (P26) plugs are not plugged into the lamp drivers.
l
Drawing A-128302
shows the test pattern displayed on a scoreboard that has one lamp driver
with the address (P25) plugged in.
Cycle 1:
Displays the protocol in the digits that are controlled by lamp driver A1. P0 is
always displayed when P26 is not installed.
Cycle 2:
Displays the driver number and address in the digits that are controlled by
each driver. A000 is always displayed when P25 is not installed.
Cycle 3:
Displays a rotating pattern in all digits. The pattern starts in row 1 and
rotates through row 8 (refer to
Drawing A-128283
).
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