Daktronics GENERIC GALAXY AF-6200 Series User manual

201 Daktronics Drive
Brookings, SD 57006-5128
www.daktronics.com/support
800.325.8766
GENERIC GALAXY®
AF-6200/6300 SERIES
DISPLAY MANUAL
P1616
31 May 2018
DD3894570
Rev 00

Copyright © 2018
All rights reserved. While every precaution has been taken in the preparation of this manual, the publisher assumes no
responsibility for errors or omissions. No part of this book covered by the copyrights hereon may be reproduced or copied
in any form or by any means—graphic, electronic, or mechanical, including photocopying, taping, or information
storage and retrieval systems—without written permission of the publisher.
Daktronics trademarks are property of Daktronics, Inc. All other trademarks are property of their respective companies.

– i –
Table of Contents
1 Introduction.........................................1
Display Overview .......................................1
Network Concepts ....................................2
RS232........................................................2
RS422........................................................2
Ethernet....................................................2
Fiber-optic Ethernet................................3
Cellular Modem......................................3
2 Mechanical Installation .....................4
Support Structure Design ..........................4
Display Mounting.......................................4
Rear Mounting (Single Face Only)........4
Top/Bottom Mounting (Single Face or
Double Face) ..........................................4
Side Mounting (Single Face or Double
Face)........................................................4
Shoe Mounting (Single Face or Double
Face)........................................................5
Power and Signal....................................5
For Shoe-Mounting Method...................5
3 Electrical Installation ..........................6
Getting Started ..........................................6
Conduit.......................................................6
Power Requirements .................................6
Grounding ..................................................7
New Power Installation...........................7
Existing Power Installation......................7
Signal Termination from Computer to
Display.........................................................8
RS232........................................................8
RS422........................................................8
Ethernet....................................................8
Fiber-Optic Ethernet ...............................9
4 Maintenance and Troubleshooting 10
Getting Started ........................................10
Weather Stripping....................................10
Accessing the Internal Components ....10
Module Removal and Replacement....10
Power Supply Replacement ..................11
Controller Board.......................................11
Controller Address Setting ..................12
Controller Diagnostics..........................14
Light Sensor...............................................15
Communication Accessories (Optional) ..
...................................................................15
RS422 Surge Suppressor .......................15
Signal Converter...................................16
Ethernet Surge Card .............................18
Fiber Media Converter.........................18
Troubleshooting .......................................19
Initialization Sequence............................20
5 Exchange and Repair ......................21
Daktronics Exchange and Repair &
Return Programs ......................................21
Exchange Program ..............................21
Before Contacting Daktronics.............21
Repair & Return Program .....................22
Shipping Address..................................23
Email ......................................................23

– ii –
This page intentionally left blank.
– ii –

Introduction
1
1 Introduction
This manual provides installation, maintenance, and troubleshooting information for
the Daktronics AF-6200/6300 displays. For information regarding the safety, installation,
operation, or service of this system, please refer to the telephone numbers listed on the
cover page of this manual.
Daktronics AF-6200/6300 displays meet the NEMA®4X standard—any customer installed
mounting hardware, power/signal entrances, and/or penetrations of any sort must
maintain the NEMA®4X standard.
The manual is divided into the following sections:
• Introduction provides the information needed to use this manual. Take time to
read the introduction as it denes terms and explains concepts used throughout
the manual.
• Mechanical Installation contains mechanical installation information for the
display.
• Electrical Installation contains electrical installation information for the display.
• Maintenance and Troubleshooting provides maintenance and general
troubleshooting information for the Daktronics AF-6200/6300 displays.
• Exchange and Repair offers information regarding the Daktronics exchange and
repair program.
• Glossary contains denitions for the terms and phrases commonly used
throughout this manual and with the Galaxy®product.
Daktronics identies manuals by the ED or DD number located on the cover page of
each manual. For example, this manual would be referred to as DD3894570.
Refer to the Daktronics Exchange and Repair & Return Programs (p.20) if any
component needs replacement or repair.
Display Overview
Daktronics outdoor Galaxy®LED displays are designed and manufactured for
performance, reliability, ease of maintenance, and long life. The displays consist of an
array of LED pixels. The conguration of the LED pixels depends on the model of LED
displays.
A typical system consists of a Windows®-based personal computer (PC) that runs Venus®
1500 software and of one or more displays. Daktronics Venus®1500 software package
operates with Windows®XP, Windows Vista®, Windows®7, and Windows®8 systems on an
IBM®-compatible computer. Refer to the Venus®1500 Controller Manual for installation
and maintenance information about the Venus®1500 editing station.

Introduction
2
Network Concepts
Daktronics offers four network systems: RS232, RS422, Ethernet, ber-optic Ethernet, and
cellular modem to interconnect and control displays. One display network can comprise
up to 240 displays. Each Daktronics system is capable of performing multiple functions,
including:
• Transferring messages.
• Programming messages to play on a display or group of displays in a network.
• Determining display statuses on a network.
The Daktronics AF-6200/6300 displays use one of the following communication methods.
Refer to the Signal Termination from Computer to Display (p.7) section for more
detailed information.
RS232
RS232 (EIA/TIA-232-E) is a standard communication interface that employs a single-
ended serial transmission scheme using a maximum cable length of 25' (7.62 m). This
interface is designed for computer communication at short distances. Most computers
have an RS232 communications port.
RS422
RS422 (EIA/TIA-422-B) is a standard communication interface that uses a differential
balanced transmission scheme typically using a maximum cable length of approximately
4,000' (1.2 km). The main advantage of RS422 over RS232 is a longer cable length. A
signal converter is needed to convert the computer’s RS232 signal to RS422.
Ethernet
An Ethernet network is a standard communication method that allows one computer,
or a number of computers, to connect to displays. Each primary display is identied by
a unique address. This address allows the computer to communicate directly with each
primary display.
Fiber-optic Ethernet
A ber-optic network is a standard communication method transmitting light (signal)
through glass bers. Fiber-optic cable has a maximum length of 2,000' (0.6 km). A signal
converter is required to convert the computer’s Ethernet interface to a light signal, and
another to convert the light signal to Ethernet within the display.
Cellular Modem
A cellular IP modem provides a wireless communication network between the display
controller and the remote central software. It can send and receive data using cellular
technologies provided by the cellular carrier.

Mechanical Installation
3
2 Mechanical Installation
Daktronics engineering staff must approve any changes made to the display. Before
altering the display, submit detailed drawings for the proposed modications to the
Daktronics engineering staff for evaluation and approval, or the warranty will be void.
Daktronics is not responsible for the integrity of the mounting structure or any mounting
hardware not provided by Daktronics. It is the customer’s responsibility to ensure a
qualied structural engineer has approved the structure and any additional hardware.
Daktronics AF-6200/AF-6300 displays meet the NEMA®4X standard—any customer
installed mounting hardware, power/signal entrances, and/or penetrations of any sort
must maintain the NEMA®4X standard.
Support Structure Design
Support structure design depends on the mounting methods, display size, and weight.
The structure design is critical and should be done only by a qualied individual. It is
the customer’s responsibility to ensure that the structure and mounting hardware are
adequate.
Daktronics is not responsible for the installations or the structural integrity of support
structures done by others.
Display Mounting
It is the customer’s responsibility to ensure the installation will meet local standards and
to determine the proper mounting method and location. The mounting hardware must
be capable of supporting all components to be mounted. The mounting hardware and
method are the responsibility of the customer. The number of attachment points needed
and the structure must be reviewed by a qualied structural engineer and meet all
national and local codes.
Note: The display has a hinged face panel. Take care to ensure the door opens
properly.
Rear Mounting (Single Face Only)
After determining the type of mounting members, attach the mounting members to the
back of the display. Place sealing washers or waterproof sealant between the display
and the mounting member to prevent water leaking into the display. Use all four, six, or
eight attachment points, depending on the size of the display.
Top/Bottom Mounting (Single Face or Double Face)
After determining the proper mounting method, top or bottom, and the type of
mounting members, attach the mounting members to the display. Place sealing washers
or waterproof sealant between the display and the mounting member to prevent water
leaking into the display. Use all eight attachment points on the display.
Side Mounting (Single Face or Double Face)
After determining the type of mounting members, attach the mounting members to
both sides of the display. Place sealing washers or waterproof sealant between the
display and the mounting member to prevent water leaking into the display. Use all eight
attachment points (four per side) on the display.

Mechanical Installation
4
Shoe Mounting (Single Face or Double Face)
A bracket may be designed to suspend the display from a support structure with the use
of two shoes. The shoe-mount method uses a shoe, or a metal base plate with a support
tube extending from its center.
Power and Signal
For all methods:
This display has many potential entrances for power or signal cables. Possible signal and
power entrances are marked with small indentations on the cabinet. After determining
a power and signal entrance, punch the appropriate size hole and refer to the Electrical
Installation (p.5) section for electrical installation. Waterproof any hole punched or
drilled in the display with either a watertight plug or with conduit to prevent water from
entering the display.
Drill from the inside of the display to ensure the components within the display are not
damaged. After drilling, remove any metal lings that might interfere with the operation
of the components within the display.
For Shoe-Mounting Method
The electrical connections can also route to the sign through the support tubes of the
shoes. If using this method, drill a hole in the display at one of the center punches
designated for power or signal. Align this hole with the support tube. Use watertight
sealant between the display and the shoe to prevent water from entering the sign.
Note: If using this method, conduit must be used—the support tubes are not a viable
raceway.

Electrical Installation
5
3 Electrical Installation
Getting Started
Daktronics recommends that a separate circuit be run to the electronic display(s) to
isolate it and prevent any issues that could be caused by line voltage uctuations or
high frequency noise on the power line caused by other types of equipment. A separate
circuit also makes display maintenance and troubleshooting easier. Daktronics assumes
no liability for any issues caused by line voltage uctuations or other improper power
conditions if these recommendations are not followed.
Only qualied individuals should terminate power and signal cable within this Daktronics
display.
Daktronics engineering staff must approve any changes made to the display. Before
altering the display, submit detailed drawings for the proposed modications to the
Daktronics engineering staff for evaluation and approval, or the warranty will be void.
Daktronics AF-6200/6300 displays meet the NEMA®4X standard—any customer installed
mounting hardware, power/signal entrances, and/or penetrations of any sort must
maintain the NEMA®4X standard.
Conduit
Daktronics does not include conduit with the display. Separate conduit must be used to
route the following:
• Power
• Signal IN wires
• Signal OUT wires (if signal is required for another display)
To prepare for power and signal entrance:
1. Release the face panel latches using a tubular key provided by Daktronics.
2. Open the face panel.
3. Clear the area for drilling.
Punch or drill out the desired area for power and signal entrance. Verify the internal
components are undamaged and free of debris. Attach the conduit and route the
power and signal cables. Use watertight connections where the conduit enters the
display cabinet.
Power Requirements
Proper power installation is imperative for display operation. For more information on
power specications refer to the power specication data label in the display located
near the power termination panel.
Grounding
All components of a display system—including but not limited to displays, control
equipment, and connected peripheral equipment—must be electrically grounded.
Only qualied individuals may perform electrical work, including verication of ground
resistance. Daktronics is not responsible for improper grounding or damage incurred as a
result of improper grounding.

Electrical Installation
6
Grounding methods must meet the provisions of all applicable local and national codes.
Inspect and verify all grounding methods meet the provisions of all applicable local and
national codes.
Proper grounding is necessary for reliable equipment operation and general electrical
safety. Failure to properly ground the display system may void the warranty, disrupt
operation, damage equipment, and cause bodily harm or death.
Local and national codes require the use of a power disconnect near the display. If
disconnect is not within direct line of sight of the display, provide a lockable disconnect
switch (knife switch) at the display location so all power lines can be completely
disconnected. Use a two-conductor disconnect so the hot line and the neutral can be
disconnected.
There are two considerations for power installation: new power installation and existing
power installation. These two power installations differ slightly, as described in the
following paragraphs. Refer to Figure 1.
New Power Installation
The power cable must contain a separate earth-ground conductor. When using a
separate ground conductor, do not connect neutral to ground at the disconnect or at
the display. This would violate electrical codes and void the warranty.
Existing Power Installation
When a separate ground conductor is not available, connect the neutral to the earth-
ground at the disconnect, never at the display.
Figure 1: Power Installation

Electrical Installation
7
Signal Termination from Computer to Display
The following communication options are available for the AF-6200/6300 series.
RS232
An RS232 network requires a 2-conductor shielded cable to transmit RS232 signal. Do not
subject this shielded cable to mechanical exing after installation. This cable is not for
direct burial. Route RS232 cable in a dedicated, grounded metallic conduit at the base
of the display structure. This cable has a maximum length of 25' (7.62 m).
The signal cable terminates within the display in the J3 jack on the display controller.
RS422
An RS422 network requires a 6-conductor shielded cable to transmit RS422 signal. This
cable consists of unpaired wires that should not be subjected to mechanical exing
after installation. This cable is not for direct burial. Route RS422 cable either in dedicated
metallic conduit or inside buildings; if not in conduit, keep away from interference signals.
With interference signals, a 2' (0.6 m) separation is typically required.
The signal cable terminates within the display to the terminal block labeled “IN RS422” on
the display controller. The opposite end terminates at the surge card.
Ethernet
An Ethernet network system requires a Cat-5 cable. Signal travels from the Local Area
Network (LAN) to the Ethernet In jack (J4) on the controller.
The signal cable terminates within the display at the controller. The opposite end
terminates at the control computer.
Surge Card (Out RS422) Field Cabling Terminal Block (In RS422)
Pin 1 (N.C.) — Pin 1 (N.C.)
Pin 2 (In-P) Red Pin 2 (Out-P)
Pin 3 (In-N) Black Pin 3 (Out-N)
Pin 4 (Out-P) Green Pin 4 (In-P)
Pin 5 (Out-N) White Pin 5 (In-N)
Pin 6 (Ground) Shield/Ground Pin 6 (Ground)
Ethernet Surge Card (J2) Ethernet In (J4)
Pin 1 (TX-P) Pin 1 (TX+)
Pin 2 (TX-N) Pin 2 (TX-)
Pin 3 (RX-P) Pin 3 (RX+)
Pin 4 (N.C.) Pin 4 (CHGND)
Pin 5 (N.C.) Pin 5 (CHGND)
Pin 6 (RX-N) Pin 6 (RX-)
Pin 7 (N.C.) Pin 7 (CHGND)
Pin 8 (N.C.) Pin 8 (CHGND)

Electrical Installation
8
Fiber-Optic Ethernet
A ber-optic network requires a 4-ber, multi-mode cable with ST connectors. Two bers
are used, leaving the other two as spares. Either use direct burial or route the cable in
conduit. Do not subject ber-optic cable to mechanical exing.
The signal cable terminates within the display at the ber card in the display at the ber
signal converter.
Note: A small power supply will be installed with the ber Ethernet options.

Maintenance and Troubleshooting
9
4 Maintenance and Troubleshooting
Getting Started
1. Turn off the breaker before performing any repair or maintenance work on the
displays. Disconnect power to the display if performing repair or maintenance.
2. Only qualied service personnel should access internal display electronics.
3. Daktronics engineering staff must approve any changes to the displays. If making
modications to the displays, submit detailed drawings to the Daktronics engineering
staff for evaluation and approval or the warranty will be void.
4. Take care when handling the display’s door to prevent injuries or damage, especially
in windy conditions.
Weather Stripping
To ensure a watertight display, Daktronics installed weather stripping around the face
panel. When replacing weather stripping, check for proper installation or water may leak
into the display and damage the components.
Accessing the Internal Components
To access the internal components of the display, a tubular key is needed (provided by
Daktronics).
To open the door and access the internal components:
1. Release the door by turning the captive latches on the door using the tubular key
provided by Daktronics.
2. Carefully lower the door. Linkages installed at each end will support the door when in
the open position.
Note: Do not lean on or place extra weight on the open door.
Module Removal and Replacement
To remove and replace a module:
1. Access the display interior using the steps outlined in Accessing the Internal
Components.
2. Release the power cable to the module by squeezing the locking tab of the black
12-pin locking connector while pulling the plug free.
3. Release the signal cable to the module by grasping the sides of the white 15-pin
connector while pulling the plug free.
4. Using a 5/16" nut driver, release the nuts securing the module panel to the door. Lift the
module panel away from the door.
5. Using a 1/4" nut driver, release the nuts securing the module to the module panel.
6. Carefully lift the module out of the face panel.
Follow the previous steps in reverse order to attach a new module.

Maintenance and Troubleshooting
10
Power Supply Replacement
Each sign uses 5 volt power supplies. One power supply can run multiple modules. The
power supplies attach to a support bracket, which secures to a mounting panel in the
rear of the display.
To replace a failed power supply:
1. Access the internal components
following the procedure outlined
in the Accessing the Internal
Components (p.9) section.
2. Turn off power to the display by
ipping the switch on the power
termination panel.
3. Using a 5/16" nut driver or wrench,
remove the two nuts securing the
power supply and support bracket
to the cabinet; refer to Figure 2.
4. Carefully lift the power supply from the display.
5. Disconnect and label all power cables from the power supply.
6. Turn the mounting plate over to access the two mounting screws. Using a Phillips
screwdriver, remove the screws to release the power supply from the plate.
7. Position the new power supply on the mounting plate and secure it using the screws.
8. Reconnect the power cables.
9. Attach the plate to the cabinet using the two nuts.
10. Reapply power to the display.
11. If necessary, adjust the voltage to match the voltage setting of the existing power
supplies.
12. Close the sign door.
Controller Board
The controller is the component that sends data to the modules. Figure 3 illustrates a
typical controller.
To remove and replace the controller:
1. Open the face panel following the steps outlined in the Accessing the Internal
Components (p.9) section.
2. Turn off power to the display by ipping the breaker.
3. Remove all power and signal connections from the controller. Label each cable to
ensure proper installation after installing the new controller.
4. Using a 5/16" nut driver, remove the nuts holding the controller in place.
5. Note the address of the rotary switches and ensure the address on the replacement
controller is the same.
6. Follow the previous steps in reverse order to install a new controller. Then reset the
display address on the controller to match the address on the removed controller.
Figure 2: Power Supply

Maintenance and Troubleshooting
11
Controller Address Setting
The rotary switches set the hardware address, which the software uses to identify the
particular display. When replacing a controller board, set the rotary switches on the new
controller to the same address conguration as the defective controller. Each controller
in a network needs a unique address. Refer to Figure 3.
UPPER LOWER
RS422 InRS422 Out
RS232 In Ethernet In Module Outputs Power In
Light Sensor InputRotary Switches
Figure 3: Controller

Maintenance and Troubleshooting
12
Set the switches by rotating them counter-clockwise until the arrow points to the desired
number; refer to Figure 4. Turn off the display’s power and then turn it back on to
activate the test mode or to change the address.
Note: Setting both rotary switches to address “0” activates a test mode. Turn off the
display’s power and turn it back on to activate testing. Refer to Figure 5.
00
Upper Lower
Figure 4: Rotary Switches
00
Address 0
Test Mode
Address 1
0—1
00
00
00
Address 2
0—2
Address 16
1—0
Upper Lower
Figure 5: Rotary Address Examples
Controller Address Settings
Address Upper Lower Address Upper Lower
Test Mode 0 0 10 0 A
1 0 1 11 0 B
2 0 2 12 0 C
3 0 3 13 0 D
4 0 4 14 0 E
5 0 5 15 0 F
6 0 6 16 1 0
7 0 7 17 1 1
8 0 8 ... ... ...
9 0 9 240 F 0

Maintenance and Troubleshooting
13
Controller Diagnostics
The following chart details the information that each diagnostic LED provides. The chart
describes normal functioning of the LEDs, whether always on or ashing at a certain rate.
Note: Some LEDS, such as Run and Receive signal, are both labeled with the same
number. This occurs because the controller includes two layers of circuit board.
In Figure 3, the CPU is the raised board on the controller.
CPU
LED Color Label (Function) Operation
DS1 Red TXD (CAN) Flashes when controller is transmitting CAN information.
DS2 Red RXD (CAN) Flashes when controller is receiving CAN information.
DS3 Red RST (System
Restart)
Off when controller is functioning properly. Flashes at
1.5-second rate if controller is not resetting the watchdog
timer.
DS4 Red RUN (Run) A steady ash indicates the controller is running properly.
Normal ash rate is about once per second.
DS5 Red PRG—(U15
Programmed) On when U15 contains a valid logic problem.
DS7 Red Link (Link)
On when Ethernet interface is in the link up condition. Flashes
when the Ethernet chip detects, transmits, or receives
activity.
DS8 Red SPD (Speed) On when Ethernet interface is at 100Mbps. Off when the
Ethernet interface is at 10Mbps.
DS9 Red DUP (Duplex) On when the Ethernet interface is at full duplex. Off when the
Ethernet interface is at half duplex.
DS10 Red COL (Collision) Flashes when the Ethernet interface detects a collision in half
duplex.
DS12 Red 2.5 V On when 2.5 V power supply is functioning.
DS13 Red 3.3 V On when 3.3 V power supply is functioning.
Product Board
LED Color Function Operation
DS1 Green 5 V On when 5 V power supply is functioning.
DS2 Green 3.3 V On when 3.3 V power supply is functioning.
DS3 Yellow TX1 (COM1) Flashes when transmitting serial information.
DS4 Yellow RX1
(COM1) Flashes when receiving serial information.
DS5 Yellow LGHT ) Light Flashes when receiving signal from light sensor.

Maintenance and Troubleshooting
14
Light Sensor
The light sensor assembly is mounted on the inside of the door in the top-left of the
cabinet. The entire assembly ts over two pressed-in studs. If the light sensor should fail,
only the circuit board needs to be replaced.
To replace a failed light sensor:
1. Disconnect the electrical connections to the light sensor.
2. Remove the nuts behind the circuit board plate and remove the plate and circuit
board from the assembly.
3. Remove the nuts securing the circuit board to the plate.
4. Remove the standoffs, plastic washers, and attachment screws from the board.
5. Remove all wiring from the defective sensor.
6. Reattach the new circuit board using the nuts removed in Step 2. Note the
orientation of the new circuit board. The photocell must line up with the circular
opening in the bottom of the display when the assembly is in place.
Communication Accessories (Optional)
RS422 Surge Suppressor
The surge suppressor is an inline device that lters the RS422 data line. It suppresses surges
to a low voltage in order to protect the display controller’s RS422 input. The surge
suppressor must rmly connect to the display to be effective. The mounting hardware
used to secure the surge suppressor is sufcient if it is fastened properly. Refer to Figure 6.
To remove the surge suppressor:
1. Disconnect the signal connections.
2. Using a 5/16" nut driver, remove the four nuts holding the surge suppressor in place.
3. Install the new surge suppressor and replace the nuts.
4. Reconnect power and signal cables.
Figure 6: RS422 Surge Suppressor

Maintenance and Troubleshooting
15
Signal Converter
The following tables list the jack pin-outs for a wire signal converter. Refer to Figure 7.
J1—25 Pin DB-F J2 and J3—RJ45 J4 and J5—Phoenix
Pin Operation Pin Operation Pin Operation
2 TX-P (out) 1 (not used) 1 GND
3 RX-P (in) 2 GND 2 RX-P (in)
7 GND 3 TX-N (out) 3 RX-N (in)
4 TX-P (out) 4 TX-P (out)
5 RX-N (in) 5 TX-N (out)
6 RX-P (in) 6 GND
7 GND
8 (not used)
Figure 7: RS232/RS422 Signal Converter

Maintenance and Troubleshooting
16
The following table details information that each LED provides. Refer to Figure 7 for an
illustration of the signal converter.
Ethernet Surge Card
An Ethernet surge card is an inline device that lters the Ethernet
data line. It suppresses surges down to a low voltage in order to
protect the display controller’s Ethernet input. If a surge card is
included with the display, it is located in the interior of the display.
Refer to Figure 8.
To replace a surge card:
1. Disconnect the input and output signal connections.
2. Carefully remove the four nuts holding the surge card in place
using a 5/16" nut driver.
3. Install the new surge card and reconnect the signal cables.
LED
Indicator Typical States Troubleshooting
Power
On Signal Converter (SC) is receiving
power.
Off
SC is not receiving power.
Internal 1 AMP fuse is bad. Replace SC.
TX
On Steady
SC is not connected to a serial
port.
Connect to open computer serial
port.
1. Serial Port or serial cable is bad.
2. Computer serial 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.
Brief Flicker SC is transmitting data.
RX
On Steady
1. Field cable between SC and
display is bad.
2. Connected to display output
jack or terminated incorrectly.
3. Bad serial 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.
Brief Flicker SC is receiving data.
TX/RX On Steady (If serial cable is connected) Bad
SC. Replace SC.
Figure 8: Ethernet
Surge Card