Daktronics KE-1010-7.6-RG - Manual (Page 57)

Signal Converter 29
Appendix B: Signal Converter
Signal Converters and Loop-back Testing for Direct Connections
The following table gives the typical state of the signal converter when the LEDs are either on or off.
Refer to Figure 25 for an illustration of the signal converter and the location of the various
components.
LEDs Typical States Troubleshooting
ON Signal Converter (SC) is receiving power
Signal Converter is not receiving power Check power/Replace fuse Power
OFF
Internal 1 AMP fuse is bad Replace fuse
Signal Converter is not connected to a
serial port Connect to open computer
COM port
On Steady 1. Serial port or serial cable is bad
2. Computer COM port is in sleep mode 1. Try another port or replace
serial cable
2. Communicate with display
OFF
Steady
Normal state, Signal Converter is not
transmitting data
TX
Brief
Flicker
SC is transmitting data
ON Steady
1. Field cabling between Signal Converter
and display is bad
2. Is connected to display output jack or
terminated incorrectly
3. Bad COM port is on display controller
1. Eliminate cabling by
disconnecting wire/cable
from SC to display controller
2. Check connections and
terminations
3. Eliminate by disconnecting
wire/cable to display
controller
OFF
Steady
Normal state, Signal Converter is not
receiving data
RX
Brief
Flicker
SC is receiving data
TX/RX ON Steady
(If serial cable is connected) Bad Signal
Converter Replace Signal Converter