Daktronics Fiber Optic Communication - Manual (Page 12)

Troubleshooting
Signal Converter
The following table gives the typical state of the signal converter when the LEDs are
either on or off. Refer to
Figure 10 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
Power
OFF
Internal 1 AMP fuse is bad Replace SC
SC 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 in sleep mode 1. Try another port or replace
serial cable
2. Communicate to 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. Connected to display output jack or
terminated incorrectly
3. Bad COM port 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
Fiber Signal Converter (0A-1127-0256)
The following tables give the jack pin-outs for a fiber signal
converter.
Figure 10: RS232/Fiber Signal
Converter
J1 - 25 Pin DB-F
PIN OPERATION
2 TX-P (out)
3 RX-P (in)
7 GND
JACK OPERATION
J2 TX1 (out)
J3 RX1 (in)
J4 TX2 (out)
J5 RX2 (in)
Fiber Optic Communication Manual 8