Daktronics GENERIC GALAXY AF-6200 Series, Руководство пользователя

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Maintenance and Troubleshooting
14
Light Sensor
The light sensor assembly is mounted on the inside of the door in the top-left of the
cabinet. The entire assembly fits over two pressed-in studs. If the light sensor should fail,
only the circuit board needs to be replaced.
To replace a failed light sensor:
1. Disconnect the electrical connections to the light sensor.
2. Remove the nuts behind the circuit board plate and remove the plate and circuit
board from the assembly.
3. Remove the nuts securing the circuit board to the plate.
4. Remove the standoffs, plastic washers, and attachment screws from the board.
5. Remove all wiring from the defective sensor.
6. Reattach the new circuit board using the nuts removed in Step 2 . Note the
orientation of the new circuit board. The photocell must line up with the circular
opening in the bottom of the display when the assembly is in place.
Communication Accessories (Optional)
RS422 Surge Suppressor
The surge suppressor is an inline device that filters the RS422 data line. It suppresses surges
to a low voltage in order to protect the display controller’s RS422 input. The surge
suppressor must firmly connect to the display to be effective. The mounting hardware
used to secure the surge suppressor is sufficient if it is fastened properly. Refer to Figure 6 .
To remove the surge suppressor:
1. Disconnect the signal connections.
2. Using a
5
/
16
" nut driver, remove the four nuts holding the surge suppressor in place.
3. Install the new surge suppressor and replace the nuts.
4. Reconnect power and signal cables.
Figure 6: RS422 Surge Suppressor