All American Scoreboards MP-3913 Instrukcja obsługi i instrukcja serwisowa - Strona 6

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Any number up to 999 may be preset in a similar manner.
3.5 Dimmer
Push
DIM
120 VAC wires are exposed whenever the cover over the controller assembly is
removed from the scoreboard. Use extreme caution during troubleshooting or repair.
To avoid possible damage to equipment or personal injury, always turn off the main
power before removing the cover or replacing assemblies, or replacing lamps.

4. MAINTENANCE AND TROUBLESHOOTING

4.1 Introduction

This section gives maintenance and troubleshooting information. Included are troubleshooting
guides for typical scoreboard malfunctions. If the cause of a problem cannot be determined,
please contact the Customer Service Department.

4.2 Test Equipment

A simple analog or digital voltmeter will be sufficient for all user repairable problems. Printed
circuit boards requiring troubleshooting should be returned to the factory.

4.3 Troubleshooting

Whenever possible; follow the troubleshooting guides prior to contacting the Customer Service
Department. If a problem not described in the guides exists, contact the customer service
department immediately. Refer to the diagrams provided for assistance in troubleshooting
scoreboard malfunctions.
4.4 Troubleshooting Guides
(A) Timers don't light and console doesn't work
(a) Check that the main power switch is turned on.
(b) Replace any defective or blown fuses.
(c) Check the power connections and voltages at the timers.
(d) If the timer still doesn't light, check the transformer voltage going to pins 5 & 6 of the data
input connector using a voltmeter set on the 12 VAC or higher scale.
If the voltage is less than 8 VAC, contact the Customer Service Department.
If the voltage is between 8-12 VAC, check the voltage again at the control console end of
the cable.
to alternately dim and brighten the lamps in the display.
WARNING
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