Daktronics VF-23 Series User manual

201 Daktronics Drive
Brookings, SD 57006-5128
www.daktronics.com/support
800.325.8766
GENERIC SERVICE
VF-23XX
GEN 3
DISPLAY MANUAL
5 June 2018
DD3874341
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
How to Use This Manual ............................1
Theory of Operation ..................................1
Vanguard®Software...............................1
VFC-3000 Controller/Vanguard®Field
Controller.................................................1
2 Components .......................................3
Modules ......................................................3
Power Supply Assembly ............................3
Power Supplies........................................3
Isolation Board........................................3
Power and Control Equipment ................3
Vanguard®Control Board......................3
Panelboard .............................................4
Surge Suppressor ....................................4
Relays ......................................................4
Sensors Network.........................................4
External Temperature/Rear Light Sensor
..................................................................4
Front Sensor.............................................4
Bottom Sensor .........................................4
Ventilation Systems....................................4
Intake Fans and Filters ...........................4
Fan RPM Sensors .....................................4
Beacon(s) ...................................................4
Trafc Cabinet ...........................................5
Cabinet Light...........................................5
Door Open Detection (Display with
VFC) .........................................................5
Door Open Detection (Display with
VFC-3000)................................................5
Pull-Out Drawers and Shelving..............5
Panelboard .............................................5
Outlet Strip and Outlets..........................5
Exhaust Fan Assembly ...........................5
Cabinet Heater .......................................5
Controller UPS..........................................5
Display UPS System.................................5
Laptop Interface Enclosure......................6
Light (Optional).......................................6
Fold-Down Shelf......................................6
Outlets......................................................6
3 Mechanical Installation .....................7
Lifting the Display.......................................7
Display Mounting.......................................7
Trafc Cabinet Mounting .......................8
Ground Mount.....................................8
Pole Mount...........................................8
LIE Mounting............................................8
4 Electrical Installation ..........................9
Getting Started ..........................................9
Power Installation.......................................9
Grounding ...............................................9
Power.......................................................9
Bonding Screw........................................9
Power Connections...................................9
Display Termination..............................10
Conduit Sealing ....................................10
Module Connection .............................10
Fans and Power Supplies Connection....
................................................................10
Trafc Cabinet .........................................10
Vanguard®Control Board Address
Setting .......................................................11
First Time Fire Up .......................................11
5 Maintenance and Troubleshooting 12
Getting Started (With UPS)......................12
Getting Started (Without UPS)................12
Service and Diagnostics .........................12
Module Numbering System ....................12
7-Segment Error Codes (VFC-3000
Controller).................................................13
Modules.................................................13
VCB ........................................................13
Isolation Board......................................13
7-Segment Error Codes (Vanguard®Field
Controller).................................................14
VCB ........................................................14
Modules.................................................15
Isolation Board......................................15
Module Replacement.............................15
Vanguard®Field Controller/VFC-3000
Controller Replacement.........................16
Power Supply Assembly Replacement .16

– ii –
Table of Contents
VCB Replacement ..................................17
Ventilation Fan and Filter Maintenance ...
...................................................................17
Filter Replacement ...............................17
Fan Replacement.................................17
Trafc Cabinet Maintenance.................18
Trafc Cabinet Fan and Thermostat
Assembly Replacement ......................18
Trafc Cabinet Light Replacement .....18
LIE Maintenance......................................18
Display Maintenance..............................18
Structure ................................................18
Earth Ground Resistance .....................18
Display Cabinet ....................................19
Temperature and Light Sensors...........19
Fans........................................................19
Filters ......................................................19
VFC-3000 Controller/Vanguard®Field
Controller...............................................19
Display Face .........................................19
Wet Outdoor Cleaning Method......19
LEDs ........................................................20
LED and Electronic Circuitry ................20
Maintenance Checklist ..........................21
Troubleshooting .......................................22
6 Exchange and Repair Programs .....25
Daktronics Part Numbers ........................25
Daktronics Exchange and Repair &
Return Programs ......................................25
Exchange Program ..............................25
Before Contacting Daktronics.............25
Repair & Return Program .....................26
Shipping Address..................................27
Email ......................................................27

Introduction
1
1 Introduction
How to Use This Manual
This manual explains the installation, maintenance, and troubleshooting of VF-23XX
series Dynamic Message Signs (DMS). For information regarding the safety, installation,
operation, or service of this system, refer to the telephone numbers on the cover page of
this manual.
Daktronics identies manuals by the ED or DD number located on the cover page of
each manual. For example, this manual is referred to as DD3874341.
The serial and model numbers for the display are on the ID label attached to the display.
This label looks similar to Figure 1. When calling Daktronics Customer Service, please have
this information available to ensure timely response.
Daktronics builds displays for long life, and they require little maintenance. However, from
time to time, certain components need replacing. Refer to the Daktronics Exchange and
Repair & Return Programs (p.25) if any component needs replacement or repair.
Theory of Operation
Vanguard®Software
Daktronics Vanguard®software allows the DMS operator to check display status and to
control messages. Refer to the Vanguard®Software Help File [F1] for information about
operating Vanguard®software.
VFC-3000 Controller/Vanguard®Field Controller
The VFC-3000 Controller/Vanguard®Field Controller is the communication hub for DMS
management. It is located in the display or the trafc cabinet.
The central controller creates messages and transmits them to the VFC-3000 Controller/
Vanguard®Field Controller for storage. Upon request from the central controller or the
front panel interface, the VFC-3000 Controller/Vanguard®Field Controller locates the
message to display and sends it to the display’s modules via the Vanguard®control
board. The modules activate the appropriate pixels to form the message.
The VFC-3000 controller/Vanguard®Field Controller also monitors local sensors (display-
based sensors) like temperature, light level, and door detection. The VFC-3000 Controller/
Vanguard®Field Controller interprets sensor data for display control and diagnostic
functions, such as adjusting the display’s intensity for current lighting conditions.
Refer to the controller manual for conguration information.
Figure 1: Display ID Label

Introduction
2
Auxiliary Control Panel
The auxiliary control panel (ACP) complements the controller by providing a secondary
control interface panel at the DMS site. The ACP allows a maintenance technician to
perform diagnostics while working in one location without having to access the controller
in another location. This improves safety and reduces maintenance time. The ACP may
be located in the display or in the trafc cabinet.

Components
3
2 Components
Modules
A module is a replaceable unit consisting of a display panel
with clusters of LEDs, called pixels. The pixels display messages
on the display. Refer to Figure 2.
Each module contains drive electronics that receive
data packets from the distribution board and lights the
appropriate pixels at the correct dimming level.
Power Supply Assembly
Power Supplies
The power supplies mount to internal cabinet verticals.
The power supplies provide power to the modules. Multiple power
supplies provide power redundancy. Each power supply is paired
with another power supply to make a power supply group. If one
power supply in the group fails, the other supports the full power load,
preventing power failure to the modules.
Isolation Board
One isolation board mounts to each power supply. The isolation board
provides input and output voltage to the power supply. Figure 3 shows
an isolation board.
The isolation board receives 120 VAC input voltage from the distribution
panel. Output from the power supply routes through the isolation board.
From there, the 24 VDC output routes to the DC breaker rail.
Isolation board diagnostics include power supply data sent to the
controller about output voltage.
Power and Control Equipment
The internal components of the equipment use information received
from the VFC-3000 controller/Vanguard®Field Controller to control the
display.
Vanguard®Control Board
The Vanguard®control board (VCB) receives high-speed serial data from the VFC-
3000 controller/Vanguard®Field Controller through a ber-optic or Cat-5 cable. It
then distributes the signal to the appropriate modules and sensors. The VCB receives
diagnostic data from the modules, temperature and light sensors, and LVDBs and
transmits the data to the VFC-3000 controller/Vanguard®Field Controller. The VCB uses
an I/O interface to control beacons. The VCB also monitors door sensors, ventilation fans,
light and temperature sensors, defog heaters, and power supplies.
The VCB uses a protocol that routes signal to each horizontal line of the display. With
this protocol, signal failure to one module in a horizontal line does not affect other LED
modules in that line.
Figure 2: Module
Figure 3: Isolation
Board

Components
4
Panelboard
The panelboard is a circuit breaker box that distributes incoming power to the display
components that require AC power.
Surge Suppressor
The parallel surge suppressor protects the display from current spikes.
Relays
Relays are solid-state switches in which the electrical current applied across one port or
terminal controls electrical currents for another terminal, such as a beacon, heater, or
fan. Relays receive signal from the VCB.
Sensors Network
External Temperature/Rear Light Sensor
The external temperature and rear light sensor consists of a small printed circuit board
(PCB) mounted to the back of the display.
The temperature and light sensor transmits the external temperature and the ambient
light level behind the display to the VCB. The VFC-3000 controller/Vanguard®Field
Controller adjusts the display accordingly.
Front Sensor
The internal temperature, humidity, and front light sensor measures the temperature
near the LED pixels and the ambient light level in front of the display. The sensor transmits
these measurements to the VCB, and the VFC-3000 controller/Vanguard®Field Controller
adjusts LED intensity to protect the LEDs from overheating.
Bottom Sensor
The bottom light sensor is located on the bottom-right of the display. It detects the light
intensity below the display.
Ventilation Systems
Intake Fans and Filters
Filtered intake fans mount to the lower rear of the display. The VFC-3000 controller/
Vanguard®Field Controller analyzes internal and external temperature readings from the
temperature sensor network and adjusts fan usage. A lter removes dust and debris from
the incoming air to protect the internal display components.
Fan RPM Sensors
If your display has fan RPM sensors, a mini CAN I/O board for the RPM fans is installed on
the rear wall of the display.
With this option, each intake fan connects to an RPM sensor. The sensors monitor up to
two fans for failure. The fans fail if they do not revolve at 1,000 RPM. This information is
then reported to and displayed on the controller.
Beacon(s)
Beacons are turned on and off independently from the rest of the sign by the VCB.
Beacons are used only during certain messages, such as emergency or warning
messages, as an extra measure of alert.

Components
5
Trafc Cabinet
Cabinet Light
The trafc cabinet is equipped with an LED light. The light is located toward the top of
the trafc cabinet. The door switch, located at the bottom of the trafc cabinet door
opening, activates the light when the cabinet door opens.
Door Open Detection (Display with VFC)
The door sensor, located at the bottom of the trafc cabinet door opening, can report
whether the door(s) are open or shut. This information routes to the Vanguard®Field
Controller, which monitors the status of the door sensor(s) and reports the status to the
controller.
Door Open Detection (Display with VFC-3000)
The door sensor, located at the bottom of the trafc cabinet door opening, can report
whether the door(s) are open or shut. This information routes to the mini CAN I/O board
which monitors the status of the door sensor(s).
Pull-Out Drawers and Shelving
Trafc cabinets contain a pull-out drawer and support shelves. The shelves hold
components such as the controller, the communication device, or a laptop computer.
The pull-out drawer is often used for storage of extra supplies such as screws,
screwdrivers, or other hardware, and for the display and controller manuals. The pull-out
drawer also can be used as a temporary location for a laptop computer.
Panelboard
The panelboard is equipped with breakers that control power to lights, heat, and other
power circuits.
Outlet Strip and Outlets
The GFCI utility outlet and control equipment outlet are located next to the panelboard.
The outlet strip is powered by the control equipment outlet. The outlet strip offers
several outlets for plugging in or charging electrical devices. The utility outlet is used for
maintenance equipment.
Exhaust Fan Assembly
The exhaust fan assembly is located at the top of the trafc cabinet and includes the
exhaust fan and a thermostat. The fan and thermostat keep internal components and
the interior of the trafc cabinet cool.
Cabinet Heater
If equipped, the heater fan is located at the bottom of the trafc cabinet. The fan,
thermostat, and heater regulate the temperature within the trafc cabinet, ensuring
internal components operate at ideal temperatures.
Controller UPS
A UPS contains batteries and an inverter. If the utility AC power fails, the UPS powers the
controller and communication equipment for a limited amount of time.
Display UPS System
Components of the display UPS system are located in the display or the trafc cabinet.
A UPS contains batteries and an inverter. If the utility AC power fails, the UPS powers the
display for a limited amount of time.

Components
6
Laptop Interface Enclosure
Light (Optional)
The LIE may be equipped with a uorescent light and light switch, located at the top of
the LIE.
Fold-Down Shelf
The LIE has a fold-down shelf that holds a laptop computer.
Outlets
The GFCI and utility outlets provide a location within the LIE to plug in electrical
equipment.

Mechanical Installation
7
3 Mechanical Installation
Lifting the Display
The top of the display is equipped with 5/8" eyebolts for lifting the display. Lift the display
using a lifting bar. Use all eyebolts, and maintain a 90° lifting angle as shown in Figure 4.
The eyebolts may fail if this is not done.
The eyebolts are designed to carry only the weight of the display cabinet. Do not lift the
mounting structure or other additional weight. Do not permanently support the display
with the eyebolts. Contact Daktronics with additional questions about display lifting.
Display Mounting
Securely mount each display to a suitable mounting structure provided by others.
Daktronics attached aluminum Z-extrusions to the back of the display for mounting.Use
all Z-extrusions when mounting the display.
Use appropriate hardware to support the weight of the display. Have a qualied
engineer inspect the mounting structure.
Note: Daktronics is not responsible for mounting methods or the structural integrity of
support structures provided by others.
After installing the display, inspect the top and sides of the display for any openings
that may allow moisture to enter the display. Seal openings with silicone or another
waterproof sealant. Not sealing openings may void the warranty.
The eyebolts can either remain in the display or be removed without compromising the
water tightness and weather resistance of the display cabinet. If removed, Daktronics
recommends replacing eyebolts with 5/8" diameter stainless steel bolts to prevent debris
from lling the threads of the permanent hardware.
Figure 4: Correctly Lifting the Display

Mechanical Installation
8
Trafc Cabinet Mounting
Ground Mount
Secure the trafc cabinet to a concrete pad using anchor bolts. Daktronics recommends
using 3/4" stainless steel anchor bolts. When anchoring the trafc cabinet to the concrete
pad, make sure the bottom of the cabinet allows for water drainage. Do not seal the
cabinet to the concrete pad as this prevents water from draining properly.
The conduit for power and signal enter through the open area in the bottom of the
cabinet.
Pole Mount
Mount the cabinet using the pole-mount brackets. Make sure the brackets are secured
at all locations.
LIE Mounting
LIEs are designed for pole-mounting. After installing the LIE, select power and signal
entrances on the bottom, sides, or rear of the LIE. Prior to drilling, be aware of internal
component locations to avoid damaging the components. Ensure the entrances will not
obstruct the drain holes on the bottom of the LIE.
Seal any hole punched or drilled in the LIE with either a watertight plug or with a
watertight conduit hub to prevent water from entering the LIE.

Electrical Installation
9
4 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.
Power Installation
Qualied personnel must perform electrical installations to prevent injury to personnel
and damage to the equipment.
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.
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.
Power
For installation with ground and neutral conductors provided, the power cable must
contain an isolated earth-ground conductor. Do not connect neutral to ground at the
disconnect or at the display; this violates electrical codes and voids the warranty. Use a
disconnect so all hot lines and neutral can be disconnected.
Bonding Screw
A bonding screw is included (not installed) with the panelboard. If the bonding screw is
required, install it to avoid violation of local and national codes.
Power Connections
Each display operates on 120/240 VAC 3-wire plus ground, single-phase power. Power
routes through the opening in the display rear and terminates at the panelboard.
Route power and signal cables to the display in conduit approved by local and national
codes. Terminate all wires as labeled in the termination panels.

Electrical Installation
10
Display Termination
Power enters the display through the rear wall near the panelboard. To connect power
to the display:
1. Locate the A41 panelboard inside the display.
2. Remove the panelboard cover to reveal the panelboard breakers.
3. Route the power cables through the 1 1/2" conduit hub into the A41 panelboard.
4. Terminate each wire at the appropriate terminal block and earth-ground lug.
Conduit Sealing
Fill the ends of conduits entering the display with duct seal.
Module Connection
4-pin connectors make the low voltage power connections within the display. Power for
each module is provided with the use of one red, one orange, one blue, and one black
wire. Power connections are completed at the factory.
The modules receive 24 VDC power from the power supply groups. Power redundancy is
achieved with the 4-pin conductor and the 2 power supplies in the power supply groups.
The primary power supply runs power through 2 pins in the 4-pin connector, and the
backup connects to the remaining 2 pins.
Both lines are 24 VDC present at all times. The backup 24 VDC line only powers the
module if the primary line fails. Primary and backup 24 VDC lines alternate between odd-
and even-addressed driver modules in an effort to balance the load.
Fans and Power Supplies Connection
The fans and power supplies use 120 VAC from the panelboard. The surge suppressor in
the panelboard protects the power supplies and modules from damaging power surges.
Trafc Cabinet
Individually wire the following items directly to the earth-ground rod with an 8 AWG or
larger wire according to the local and national codes.
• Earth-ground lug mounted on the rear of the panelboard
• Conduit grounding collars
• Earth-ground connection inside the panelboard
Earth-ground rods must be installed and connected per local and national codes.
1. Connect the auxiliary power connection to the panelboard.
2. Connect the neutral power wire to the neutral bus.
3. Connect the hot wires from the terminals to the panelboard lugs.

Electrical Installation
11
Vanguard®Control Board Address Setting
The rotary switches set the sign address, which the software uses to identify the particular
display. When replacing a VCB (refer to Figure 5), set the rotary switches on the new VCB
to the same address conguration as the defective VCB. Each VCB in a network needs a
unique address.
Set the switch by rotating it clockwise or counter-clockwise until the arrow points to the
desired number; refer to Figure 6. Only 0 through 7 are viable addresses.
First Time Fire Up
After installing the display and DMS site equipment, test the site according to the eld
test procedure. This ensures all equipment is installed properly and is operational. If a eld
test procedure is not available, call Daktronics Transportation Customer Service to obtain
a copy.
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Figure 5: Vanguard®Control Board
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Figure 6: VCB Rotary Switch

Maintenance and Troubleshooting
12
5 Maintenance and Troubleshooting
Getting Started (With UPS)
1. Before performing any repair or maintenance to the displays:
a. Disconnect utility power.
b. Disable the UPS system by shutting off the two switches on the UPS head unit face
panel.
2. Only qualied service personnel should access internal display electronics. Contact
Daktronics Customer Service for training needs.
3. Daktronics engineering staff must approve changes made to the displays. If making
modications, submit detailed drawings to the Daktronics engineering staff for
evaluation and approval or the warranty will be void.
Getting Started (Without UPS)
1. Disconnect power before performing any repair or maintenance to the displays.
2. Only qualied service personnel should access internal display electronics. Contact
Daktronics Customer Service for training needs.
3. Daktronics engineering staff must approve changes made to the displays. If making
modications, submit detailed drawings to the Daktronics engineering staff for
evaluation and approval or the warranty will be void.
Service and Diagnostics
The VF-23X0 series DMS are front accessible, meaning all internal components are
accessible from the front of the display.
The following tools are required to service the display:
• Stubby Phillips screwdriver
• Small Phillips screwdriver
• Small at-head screwdriver
• Small pliers
• Medium Phillips screwdriver
• Medium at-head screwdriver
Module Numbering System
Daktronics uses a module numbering system
to help with troubleshooting; refer to Figure 7.
• Nut driver (3/8")
• Allen Wrench (1/8")
• Cable ties
• Multimeter
• Clamp-on ground meter
Figure 7: Module Numbering

Maintenance and Troubleshooting
13
7-Segment Error Codes (VFC-3000 Controller)
A 7-segment indicator appears on the following components; refer
to Figure 8. The 7-segment indicator provides codes to indicate any
present errors and their cause. When an error occurs, the 7-segment
will ash the error code. If multiple errors are present, the 7-segment
will ash the errors individually in succession. If no errors are present, the
7-segment will show a continuously looping gure-8.
Modules
7-Segment Error Code Error Cause
1 Communications Lost No CAN packets received for
10 seconds
2 Failed Pixel
Refer to the table in the
Troubleshooting (p.22)
section.
3 Power Failure Input Voltage has dropped
below 20 VDC
8 (solid) Lost Packet Diagnostic packet, FIFO full
8 (looping) No Error
VCB
7- Segment Error Code Error Cause
1 Communications Lost No CAN packets for 10
seconds
3 Power Failure
Board voltages below limit:
V-ln, 1 and 2 < 20 VDC
9 V < 8.52 VDC
3.3 V < 3 VDC
2.5 V < 2.37 VDC
1.2 V < 1.1 VDC
8 (looping) No Error
Isolation Board
7-Segment Error Code Error Cause
1 Communications Lost No CAN packets for 10
seconds
2 Input power failure V-In < 21 VDC
5 Output power failure V-In < 21 VDC (with V-ln OK)
8 (looping) No Error
Figure 8: 7-Segment

Maintenance and Troubleshooting
14
7-Segment Error Codes
(Vanguard®Field Controller)
Three 7-segment indicators appear on the
following component; refer to Figure 9. The
7-segment indicators provide codes to indicate
normal running conditions as well as any present
errors and their cause. When an error occurs, the
7-segment will ash the error codes individually in
succession. If no errors are present, the 7-segment
will continuously cycle normal running conditions.
VCB
7- Segment Error Code Error Cause
E r r Error
If an error condition exists, the
VCB will display E r r then the
remaining error codes.
i d Hardware ID
Hardware ID (jumpers on
the module) can’t be read
correctly (parity error), or
have changed during runtime
A d r Address ProLink 6 address does not
match rotary switch setting
h r d Hardware
-Errors on PL6 link(s)
-Error on sensor CAN port
On board voltage error
(measurement out of range)
-Invalid or high VCB
temperature reading
-Error reading / writing to serial
FLASH
-Error with EPLD
-7-segment display errors
(bad segment)
-Input voltage out of range
c o d Firmware
-Invalid interrupt occurred
-Micro bootloader FW not
found
-Stack overow
-EEPROM write / erase error
-No EPLD bootloader
program found, or running
EPLD bootload FW when it
shouldn’t be
-Invalid PL6 modify packet
P L 6 ProLink 6 Port A and Port B not in sync
Figure 9: Three 7-Segment Indicators

Maintenance and Troubleshooting
15
A single 7-segment indicator appears on the following components;
refer to Figure 10. The 7-segment indicator provides codes to indicate
any present errors and their cause. When an error occurs, the 7-segment
will ash the error code. If multiple errors are present, the 7-segment
will ash the errors individually in succession. If no errors are present, the
7-segment will show a continuously looping gure-8.
Modules
7-Segment Error Code Error Cause
1 Communications Lost No CAN packets received for
10 seconds
2 Failed Pixel Refer to the table in
Troubleshooting (p.22).
3 Power Failure Input Voltage has dropped
below 20 VDC
8 Lost Packet Diagnostic packet, FIFO full
8 (looping) No Error
Isolation Board
7-Segment Error Code Error Cause
1 Communications Lost No CAN packets for 10
seconds
2 Input power failure V-In < 21 VDC
5 Output power failure V-In < 21 VDC (with V-ln OK)
8 (looping) No Error
Module Replacement
1. Turn off power to the failed module by turning off the breakers for all power supplies.
2. Remove the wire connections:
a. Press the locking tabs of the 2-pin power connector and remove the connector.
b. Press the tabs of the 8-pin signal connector and remove the connector.
3. Unlatch the 9 plastic wingnuts securing the module to the display.
4. Remove the module from the display face.
5. Align the new module with the 9 studs and replace the 9 plastic wingnuts removed in
Step 3.
Figure 10:
7-Segment
Note: If a wingnut is lost, replace it with only plastic wingnuts. Do not use metal
wingnuts.

Maintenance and Troubleshooting
16
6. Plug the 2-pin power connector and 8-pin signal connector into the new module.
7. Reapply power to the power supplies turned off in Step 1.
8. Test the modules:
a. Display the moving row, moving column, and all on/all off test messages. Run
the test messages at both 10% and 100% brightness settings. Watch for proper
operation of the LED module during each test message.
b. Perform a pixel test and check that all pixels operate correctly.
Vanguard®Field Controller/VFC-3000 Controller
Replacement
1. Turn off the power switch on the VFC-3000 controller/Vanguard®Field Controller face.
2. Label and remove all of the connections from the front and rear of the VFC-3000
controller/Vanguard®Field Controller.
3. Remove the screws securing the VFC-3000 controller/Vanguard®Field Controller to
the inside of the display or trafc cabinet and remove the controller.
4. Perform the needed maintenance.
5. When the VFC-3000 controller/Vanguard®Field Controller is ready for installation, slide
it back into place.
6. Hold the controller in place and install the mounting screws.
7. Reconnect all connectors removed from the VFC-3000 controller/Vanguard®Field
Controller.
8. Secure any retaining screws and prepare the VFC-3000 controller/Vanguard®Field
Controller for operation.
9. Recongure controller.
Power Supply Assembly Replacement
Power supplies are mounted on the vertical interior of the display.
1. Turn off power to the power supplies by turning off the breaker in the distribution
panel.
2. Locate the failed power supply reported by the VFC-3000 controller/Vanguard®Field
Controller.
3. Note the location and orientation of the plugs connected to the isolation board on
the failed power supply. Disconnect the plugs going into the isolation board.
4. Remove the screw and cut the cable tie securing the hook mount to the vertical. Lift
and rotate to bring the assembly through the module opening.
5. Loosen the six screws securing the power supply assembly to the mounting plate, and
gently lift the power supply off the mounting plate.
To replace the new power supply, repeat the above steps in reverse order.
Note: The connectors only t together one way; do not force the connection.