Daktronics TI-2022, Display Manual

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Display Maintenance
14
Replacing the Digit/Driver Printed Circuit Board
1� To access the digit/driver PCB, remove the 10 outer screws to separate the front and
back panels of the display.
2� Disconnect all plugs from the PCB by squeezing together the locking tabs and pulling
the connectors free. It may be helpful to label the cables or take a picture to know
which plug goes to which jack when connecting the replacement PCB.
3� Remove the 8 nuts securing the PCB to the front panel of the display. Take note of
the orientation of the PCB for future reference.
4� Carefully remove the PCB from the studs and spacers on the front panel. Use an even
force to prevent any damage that might result from bending the LEDs or connector
pins on the board.
5� Position the new PCB over the studs, making sure there are spacers between the front
panel and circuit board.
6� Tighten the 8 nuts.
7� Reconnect all plugs to their mating jacks on the PCB. The connectors are keyed and
will attach in one way only. Do not force the connections.
8� Close and secure the back panel with 10 screws, then power on and test the display
to verify the issue has been resolved.
Replacing Batteries
CAUTION! DANGER OF EXPLOSION IF BATTERY IS INCORRECTLY REPLACED� REPLACE ONLY
WITH THE SAME OR EQUIVALENT TYPE�
CAUTION:
Do not allow any metal object, including jewelry, to contact the battery
terminal – a short-circuit on a battery can produce very high current, causing equipment
damage or severe burns!
To remove and replace a battery, refer to
Figure 13 and follow these steps:
1� Remove the 10 outer screws to separate the front and back panels of the display.
2� Disconnect the power leads from the terminals.
3� Remove the 4 nuts securing the battery bracket.
4� Remove and replace the battery.
5� Reconnect the power leads to the terminals of the new battery exactly as follows:
RED to the POSITIVE terminal, BLACK to the NEGATIVE terminal .
6� Tighten the 4 nuts to secure the battery bracket.
7� Close and secure the back panel with 10 screws, then power on and test the display.
Do not throw old battery in trash. The battery contains lead and should be recycled.
WARNING! Do not expose batteries to excessive heat, such as direct sunlight or open fire.