Daktronics CE-1010 - Manual (Page 62)

6/30/2004
ED-14413
Page 1
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 1 and Figure 2 on next the page for an illustration of the signal
converters and the locations of the various components.
LED
Indicators
Typical States Troubleshooting
ON
Signal Converter (SC) is receiving
power
SC is not receiving power Check power/Replace fuse
Power
OFF
Internal 1 AMP fuse is bad Replace fuse
SC is not connected to a serial port Connect to open computer
COM port (COM port could be
sleep mode.)
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, SC is not transmitting
data
TX
Brief Flicker SC is transmitting data
ON Steady
1. Field cabling between SC 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, SC is not receiving data
RX
Brief Flicker SC is receiving data
TX/RX ON Steady (If serial cable is connected) Bad SC Replace SC