Troubleshooting
9
Component Access and Digit Replacement
Reference Drawings:
Component Access; BB-216* ..........................................................................
DWG-4934070
Refer to
DWG-4934070
for instructions on how to open the shot clock cabinet and
replace the digit panels.
Note:
It can be difficult to properly replace a digit. Do so very carefully!
Schematics
Reference Drawings:
Schematic: 120V Control Enclosure ...............................................................
DWG-4910448
Schematic: 240V Control Enclosure ...............................................................
DWG-4910665
Digit Switch Settings ..........................................................................................
DWG-4911300
For advanced display troubleshooting and repair, it may be necessary to consult the
schematic drawings.
DWG-4910448
and
DWG-4910665
show detailed power and signal
wiring diagrams of internal display components such as drivers, power supplies, and
horns.
The schematic drawings also show the DIP switch settings on the driver that control when
the horn sounds.
DWG-4911300
shows the rotary switch settings on the shot clocks that
control when the LED light strips turn on as well as how tenths of a second displays on the
shot time digits.
LED Driver
The LED driver performs the task of switching digits on and off. The LED driver for
transparent shot clocks is located inside of a separate control enclosure. Refer to
to view the component locations within the control enclosure.
Driver Status
Indicators
Shot Clock Driver
Horn Interface Card
Power Supply
Figure 4:
Driver Enclosure Components
When troubleshooting driver problems, three LEDs labeled
DS1
,
DS2
, and
DS3
provide
diagnostic information.
Note:
While it is necessary to have the display powered on to check the LED status
indicators, always disconnect power before servicing.
Summary of Contents for BB-2160
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