Daktronics DF-1030 - Manual (Page 37)

Maintenance and 4-9
Troubleshooting
Symptom/Condition Possible Cause
Cannot communicate with display
via current loop
• Check connections at j-box and display
• Make sure DataMaster is receiving power
• Check serial cable from DataMaster to j-box
Cannot communicate with display
via radio
• Check for power to signal converter connected to
server
• Check wiring from signal converter to server
• Check connections from Client to display
• Make sure DataMaster and display have power
Cannot communicate with display
via modem
• Verify the correct phone number
• Check the tip and ring connections to the modem
at the display
• Make sure display and DataMaster have power
Garbled display
• Internal driver logic malfunction
• DataMaster malfunction
Digit will not light
• Black wire to digit broken
• Poor contact at driver connection
• Driver malfunction
Segment will not light
• Broken LED or connection
• Broken wire between driver and digit
• Poor contact at driver connector
Segment stays lit
• Driver shift register failure
• Short circuit on digit
Data appears in the wrong place
on the display, wrong data on a
particular line of the display
• Incorrect address settings on drivers (Refer to
“Power On Self-Test” in the following section, and
consult tables to set correct addresses.)
Some displays have their own built-in troubleshooting mechanism. Failures that may
occur in the display driver are described using codes. In the event a sign
malfunctions, a failure code registers by displaying an “E (x)” value on the first two
digits of the display. “E” simply indicates an error, and the letter “x” represents the
actual code number. Refer to the following table for a description of each failure
code and for possible solutions.
Note: The LCD screen on the DataMaster 100 controller will not show the failure
codes described in the following table. Failure codes will be displayed only on the
DataMaster sign.