Daktronics KE-1010-7.6-RG - Manual (Page 21)

Section 5: Maintenance and Troubleshooting
This section covers the basic maintenance needed to keep the display operating effectively. Also
included are diagnostic and troubleshooting information to pinpoint display problems and provide
solutions. Following this are definitions of terms used in the manual.
• Disconnect power before any repair or maintenance work is done on the display!
• Qualified service personnel must make any access to internal display electronics.
• Disconnect power when the display is not in use.
5.1 Display Maintenance
Controller Diagnostic LEDs
The ticker controller has four LEDs that indicate whether the controller is functioning
properly. Note that the transmit and receive LEDs will toggle on and off a few times when
the controller is first establishing communication.
LED Name Label Indication
Power PWR On constantly when operating correctly.
Run RUN Blinks at a rate of every half second when power is on.
Receive RXD Flashes each time data is received.
Transmit TXD
Flashes when sending data from the controller to the
computer. Most of the time, this LED is off.
Figure 17: Controller with Diagnostic LEDs
Maintenance and Troubleshooting 15