Daktronics VF-2100 User manual
201 Daktronics Drive
Brookings, SD 57006-5128
www.daktronics.com/support
800.325.8766
GENERIC SERVICE
VF-2100 GEN 3
DISPLAY MANUAL
27 September 2018
DD3938527
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
DMS Overview............................................1
Theory of Operation ..................................1
Vanguard® Software �������������������������������1
VFC-3000 Controller/Vanguard® Field
Controller ������������������������������������������������1
Auxiliary Control Panel ��������������������������2
Display Peripherals���������������������������������2
2 Components ���������������������������������������3
Modules ......................................................3
Power Supply Groups................................3
Power Supplies����������������������������������������3
Isolation Board����������������������������������������3
Low Voltage Distribution Board �������������3
Service Control Panel................................4
Vanguard® Control Board (VCB) with
VFC-3000 �������������������������������������������������4
Vanguard® Control Board (VCB) with
VFC�����������������������������������������������������������4
Panelboard ���������������������������������������������5
Surge Suppressor ������������������������������������5
Relays ������������������������������������������������������5
Sensors Network.........................................5
Rear Sensor ���������������������������������������������5
Internal Sensor ����������������������������������������5
Bottom Sensor �����������������������������������������5
Door Detection����������������������������������������5
Ventilation and Heater Systems...............5
Intake Fans and Filters ���������������������������5
Defog Heater Fans����������������������������������5
Fan RPM Sensors �������������������������������������6
Beacon(s) ..................................................6
Trafc Cabinet ...........................................6
Cabinet Light�������������������������������������������6
Door Reporting����������������������������������������6
Pull-Out Drawers and Shelving��������������6
Panelboard ���������������������������������������������6
Outlet Strip and Outlets��������������������������6
Exhaust Fan Assembly ���������������������������6
Cabinet Heater ���������������������������������������6
UPS �����������������������������������������������������������6
Laptop Interface Enclosure......................7
Light����������������������������������������������������������7
Fold-Down Shelf��������������������������������������7
Outlets������������������������������������������������������7
3 Mechanical Installation ���������������������8
Lifting the Display.......................................8
Display Mounting.......................................8
Trafc Cabinet Mounting..........................9
Ground Mounting �����������������������������������9
Pole Mounting�����������������������������������������9
4 Electrical Installation ������������������������10
Getting Started ........................................10
Power Installation.....................................10
Grounding ���������������������������������������������10
Power�����������������������������������������������������10
Bonding Screw��������������������������������������10
Power Connections.................................10
Display Termination������������������������������10
Conduit Sealing ������������������������������������11
Module Connection �����������������������������11
Fans and Power Supplies Connection11
Trafc Cabinet .........................................11
Vanguard® Control Board Address
Setting .......................................................12
First Time Fire Up .......................................12
5 Maintenance and Troubleshooting 13
Getting Started ........................................13
Service and Diagnostics .........................13
Module Numbering System ....................13
7-Segment Error Codes (VFC-3000).......14
Modules�������������������������������������������������14
VCB ��������������������������������������������������������15
LVDB�������������������������������������������������������15
VCB ��������������������������������������������������������16
Modules�������������������������������������������������17
Isolation Board��������������������������������������17
Internal Component Access..................18
VFC-3000 Controller Replacement........18
Vanguard®Field Controller Replacement
...................................................................18
Module Replacement (46/66mm).........19
Module Replacement (20mm) .............19
– ii –
Table of Contents
Power Supply Assembly Replacement .20
SCP Maintenance ...................................20
Ventilation Fan and Filter Maintenance
...................................................................20
Filter Replacement �������������������������������21
Fan Replacement���������������������������������21
Trafc Cabinet Maintenance.................21
Trafc Cabinet Fan and Thermostat
Assembly Replacement ����������������������21
Trafc Cabinet Light Replacement �����21
LIE Maintenance......................................21
Display Maintenance..............................22
Structure ������������������������������������������������22
Earth Ground Resistance ���������������������22
Display Cabinet ������������������������������������22
Temperature and Light Sensors�����������22
Ventilation Fans ������������������������������������22
Filters ������������������������������������������������������22
VFC-3000 Controller �����������������������������22
Vanguard®Field Controller������������������23
Face Panels�������������������������������������������23
Wet Outdoor Cleaning Method ����������23
Pressure Wash Cleaning Method��������23
LEDs ��������������������������������������������������������24
LED and Electronic Circuitry ����������������24
Maintenance Checklist ..........................24
Troubleshooting .......................................25
6 Exchange and Repair Programs �����28
Daktronics Part Numbers ........................28
Daktronics Exchange and Repair &
Return Programs ......................................28
Exchange Program ������������������������������28
Before Contacting Daktronics�������������28
Repair & Return Program ���������������������29
Shipping Address����������������������������������29
Email ������������������������������������������������������29
Glossary���������������������������������������������������30
Introduction
1
1 Introduction
How to Use This Manual
This manual explains the installation, maintenance, and troubleshooting of VF-2100
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 identies manuals by the ED or DD number located on the cover page of
each manual. For example, this manual is referred to as DD3938527.
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 Exchange and Repair
Programs (p�28) if any component needs replacement or repair.
DMS Overview
The VF-2100 series displays have rear access.
Theory of Operation
Vanguard® Software
Daktronics Vanguard® software allows the DMS operator to check display status and to
control messages.
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 trafc 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.
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.
Display Peripherals
A peripheral is a display component congured through the VFC-3000 controller or the
Vanguard® Field Controller. Peripherals include sensors, power supplies, isolation boards,
fans, and heaters.
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 3 and
Figure 2.
Each module contains drive
electronics that receive data
packets from the Vanguard® control
board and lights the appropriate
pixels at the correct dimming level.
Power Supply Groups
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 5
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.
Low Voltage Distribution Board
One low voltage distribution board (LVDB)
mounts to each power supply. The (LVDB)
provides input and output voltage to the power
supply. Figure 4 shows an LVDB.
The LVDB receives 120 VAC input voltage from
the distribution panel. Output from the power
supply routes through the LVDB. Each output is
fused at 15 A with automotive spade fuses. From
there, the 24 VDC output routes to the modules.
LVDB diagnostics include power supply data sent
to the VFC-3000 controller about output voltage
and the passing or failing of each fuse.
Figure 2: Module (Rear View)
Figure 3: Module
(Rear View)
Figure 4: LVDB Figure 5: Isolation
Board
Components
4
Service Control Panel
The service control panel (SCP) is located on the left side of the display facing the rear.
The internal components of the SCP use information received from the VFC-3000
controller/Vanguard® Field Controller to control the display. Figure 6 shows the location of
the SCP’s internal components.
Vanguard® Control Board (VCB) with VFC-3000
The Vanguard® control board (VCB) receives high-speed serial data from the VFC-
3000 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 isolation boards and transmits the data to the VFC-
3000 controller. The VCB uses an I/O interface to control beacons. The VCB also monitors
door sensors, ventilation fans, 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.
Vanguard® Control Board (VCB) with VFC
The Vanguard® control board (VCB) receives high-speed serial data from the Vanguard®
Field Controller through a ber-optic cable. It then distributes the signal to the
appropriate modules and sensors. The VCB receives diagnostic data from the modules,
temperature and light sensors, then transmits the data to the Vanguard® Field Controller.
The VCB uses an I/O interface to control beacons. The VCB also monitors door sensors,
and ventilation fans.
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.
Vanguard®Control
Board (VCB)
Surge Suppressor
Relays
Panelboard
Figure 6: Service Control Panel
Components
5
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 or fan. Relays
receive signal from the VCB.
Sensors Network
Rear Sensor
The rear light sensor consists of a small printed circuit board (PCB) mounted to the back
of the display.
The light sensor transmits the ambient light level behind the display to the VCB. The VFC-
3000 controller/Vanguard® Field Controller adjusts the display accordingly.
Internal 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.
Door Detection
The left-end sensor is located at the lower left of the door opening(s). The sensor
detects whether the doors are open or shut, and it routes this information to the VCB,
which monitors the status of the door sensors and reports it to the VFC-3000 controller/
Vanguard® Field Controller. This is reported as door detection to the VFC-3000 controller/
Vanguard® Field Controller.
Ventilation and Heater 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.
Defog Heater Fans
The heater fans mount to the bottom front of the display. The heater fans warm the front
face to prevent fogging. The controller analyzes internal temperature readings from the
temperature sensor network and adjusts heater fan usage accordingly.
Components
6
Fan RPM Sensors
Each ventilation fan has an internal RPM sensor. The fans fail if they do not revolve at
least 1,000 RPM. This information is then reported to and displayed on the VFC-3000
controller/Vanguard® Field Controller.
Beacon(s)
Beacons are turned on and off independently from the rest of the sign by the VCB.
Beacons are used at the customer’s discretion.
Trafc Cabinet
Cabinet Light
The trafc cabinet is equipped with an LED light and sensor. The door sensor, located at
the top of the trafc cabinet door opening, activates the light when the cabinet door
opens. The light is activated when the door opens.
Door Reporting
The door sensor, located at the top of the trafc cabinet door opening, can report
whether the door(s) are open or shut. This information is reported to the controller.
Pull-Out Drawers and Shelving
Trafc cabinets contain a pull-out drawer and several 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, heaters, and
other power circuits.
Outlet Strip and Outlets
The GFCI and utility outlet are located next to the panelboard. The GFCI outlet is for
service personnel only. Do not use the GFCI outlet for control equipment.
The outlet strip offers several outlets for plugging in control equipment.
Exhaust Fan Assembly
The exhaust fan assembly is located at the top of the trafc cabinet and includes the
exhaust fan and a thermostat. The fan and thermostat keep internal components and
the interior of the trafc cabinet cool.
Cabinet Heater
The heater fan is located at the bottom of the trafc cabinet. The fan, thermostat, and
heater regulate the temperature within the trafc cabinet, ensuring internal components
operate at ideal temperatures.
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.
Components
7
Laptop Interface Enclosure
Light
The LIE is equipped with a 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 utility outlets provide a location within the LIE to plug in control equipment.
The GFCI outlet is for service personnel only. Do not use the GFCI outlet for control
equipment.
Mechanical Installation
8
3 Mechanical Installation
Lifting the Display
The top of the display is equipped with two 5/8" eyebolts for lifting the display. Lift the
display using a lifting bar. Use both eyebolts, and maintain a 90° lifting angle as shown in
Figure 7. 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 qualied
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 7: Correctly Lifting the Display
Mechanical Installation
9
Trafc Cabinet Mounting
Ground Mounting
Secure the trafc cabinet to a concrete pad using anchor bolts. Daktronics recommends
using 3/4" stainless steel anchor bolts. When anchoring the trafc 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 Mounting
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
10
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
Qualied 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 qualied individuals may perform electrical work, including verication 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.
Display Termination
Power enters the display through the right end 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 main lugs.
Electrical Installation
11
3� Route the power cables through the 1 1/2" conduit hub, into the SCP, and 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
2-pin connectors make the low voltage power connections within the display. Power for
each module is provided with the use of one red and one black wire. Power connections
are completed at the factory.
Fans and Power Supplies Connection
The fans and power supplies use 120 VAC from the panelboard. The surge suppressor in
the panelboard protects the internal components from damaging power surges.
Trafc Cabinet
Individually wire the following items directly to the earth-ground rod with an 8 AWG or
larger wire according to 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.
• Connect the auxiliary power connection to the panelboard.
• Connect the neutral power wire to the neutral bus.
• Connect the hot wires from the terminals to the panelboard lugs.
Electrical Installation
12
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 8), set the rotary switches on the new VCB
to the same address conguration 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 9. 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 at 800-
833-3157 to obtain a copy.
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Figure 8: Vanguard® Control Board
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Figure 9: VCB Rotary
Switch
Maintenance and Troubleshooting
13
5 Maintenance and Troubleshooting
Getting Started
1� Disconnect power before performing any repair or maintenance to the displays.
2� Only qualied 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
modications, submit detailed drawings to the Daktronics engineering staff for
evaluation and approval or the warranty will be void.
Service and Diagnostics
The VF-2100 series DMS are rear accessible, meaning all internal components are
accessible from the rear 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
• Nut driver (3/8")
• Cable ties
• Multimeter
• Clamp-on ground meter
Module Numbering System
Daktronics uses a module numbering
system to help with troubleshooting; refer to
Figure 10.
Figure 10: Module Numbering
Maintenance and Troubleshooting
14
7-Segment Error Codes (VFC-3000)
A 7-segment indicator appears on the following components; refer
to Figure 11. 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 Figure 11: 7-Segment
7-Segment Error Code Error Cause
1 Communications Lost No CAN packets received for
a default of 10 seconds
2 Failed Pixel
Refer to the table in the
Troubleshooting (p�25)
section.
3 Power Failure
Input Voltage has dropped
below the recommended
voltage
4 Invalid address error No valid address read from
the address/signal harness
5 MDF error Missing or corrupt module
denition le in rmware
6 ORDF error
Missing or corrupt output
routine denition le in
rmware
7 LPF error Missing or corrupt LED prole
le in rmware
8 (solid) White point error Missing or corrupt LED currents
or white point settings
8 (looping) No Error
Maintenance and Troubleshooting
15
VCB
7- Segment Error Code Error Cause
1 Communications Lost No ber packets for 15
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
LVDB
7-Segment Error Code Error Cause
1 Communications Lost No CAN packets for 10
seconds
2 Input voltage error V-In < 22 VDC
3 Single fuse error One fuse is blown.
4 Multiple fuse error Multiple fuses are blown.
8 (Looping) No Error
Maintenance and Troubleshooting
16
7-Segment Error Codes (VFC)
Three 7-segment indicators appear on the
following component; refer to Figure 12. 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 overow
-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 12: Three 7-Segment Indicators
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