Daktronics AB-1600-1.5,2.5 - Manual (Page 35)

Electrical Installation
3-15
3.12 First Time Power Up
After making all connections, turn on the display for a first-time field test.
1. Set all breakers to the OFF position.
2. Turn power ON to the display at the main disconnect.
3. Carefully check the voltage between the hot lines and neutral. Normal voltage range is between
120VAC and 125VAC.
4. If there are problems with voltage, check with your local electrician or Power Company.
5. Reset the breakers to the ON position.
6. Turn power ON to the display at the main disconnect (if it was turned off).
If the controller is not running, the display will blank after it has run through the power up test
pattern. If the controller is running, the graphics or video will appear when the power comes back.
3.13 Lamp Voltage Check
The final step in display installation is the checking of lamp voltages. Excessive voltage to the lamps
will cause premature burnout while insufficient voltage will hinder the display’s effectiveness.
Although a line voltage check was completed prior to installation, it is necessary to run the lamp
voltage test. This test will bring to light any internal problems, such as a transformer damaged during
shipping that could result in excessive voltage going to the lamps.
Complete the following steps to test lamp voltages.
1. Turn on the power to the display and configure the display to have 50% of the lamps on per
module. This can be done by either:
• = Creating a static sequence with alternate columns on, or
• = Selecting the sequence from the appropriate controller manual under the diagnostics section.
Refer to the Controller Manual for more information on setting up and running sequences.
2. Lamps should be on bright (refer to Section 3.14).
3. Remove a lens and an ON lamp from any column from one of the above modules. Lens removal
and replacement is in Section 4.4. Figure 38 illustrates the use of the lamp removal tool.
4. Insert the lamp voltage tester into the empty lamp socket.
5. Place the probes of the voltage tester leads into the holes of the lamp voltage tester (Figure 39).
Record the lamp voltage reading on each of the “1600 Series Display Power Report” forms found
in Appendix B. Drawing A-103186 lists expected lamp life based on line and lamp voltages.
i
USE EXTREME CAUTION!
Do not short across the terminals of the voltage tester. Doing so will damage the module
electronics.
6. Repeat the above steps for at least two more modules.
7. Carefully replace the lamps and lenses.
Remember to record the lamp voltage readings on each “Display Power Report” found in
Appendix B. Return one of the forms to Daktronics Customer Service.