Service manual

b. If the console display indicates “Lo b” and some digits on the score-
board do not count (flip) properly, the battery is probably very low and
needs recharging.
Two operations can be performed:
1. You can apply 115 VAC power and unplug the battery from the
control board to bypass the battery. The scoreboard will operate
properly but the battery will not recharge.
2. You can apply 115 VAC power to recharge the battery.
Note: A very low battery (or dead battery) could cause some digit
segments to flip slowly or not at all. Once the battery has received
a partial charge, the digits should return to normal operation.
c. If the console LCD shows “Lo b” when the scoreboard is plugged into
115 VAC and all functions work correctly, confirm that the ON/OFF slide
switch, located on the scoreboard’s control board, is in the ON position.
d. If the problem cannot be isolated, try the suggestion under “What To
Do If ‘Nothing’ Works”, page 7-1. If these suggestions are not successful,
assume failure of either the control board or the console. Return both
components to the factory for service.
Possible Solutions:
a. If one or more keys on the console are inoperative or work randomly,
return the console to the factory for service.
b. If one or more keys on the console do not “click”, return the console to
the factory for service.
If the scoreboard is not receiving electrical power, obviously, it will not
operate. A symptom of no power is that the console display is blank and
the digits do not move. When electrical power is initially supplied to the
scoreboard, the digits should display or turn on to the pre-programmed
configuration.
To confirm that the scoreboard is in fact receiving electrical power, a
qualified electrician should be consulted. The following steps should be
performed:
Measure the voltage at the wall outlet for 105 to 125 VAC. Measure with a
load.
Measure the voltage on the secondary side of the center tapped trans-
former for 24 volts AC at connector J1, see Fig. 43, page 7-8 and Fig. 44 on
the following page. Also check for 12 VAC on each side of the center tap.
Step 1
Step 2
7-9
Problem with Inoperative Keys on the Console.
Trouble Shooting-Electrical Power