Daktronics DF-1050/1051/1052/1053 - Manual (Page 12)

1-6 Introduction
Client: The client display contains a client driver that receives signal from the “host”
driver on the Signal IN terminals. These drivers can re-drive signal to other client
drivers.
DataMaster Controller (DM100): The handheld keyboard like device used to set
the time, date, hold times, dimming etc. on the Parking Garage display. See Section
5 for more information on the DataMaster controller.
Display Address: The display address is an identification number assigned to each
driver in a network. The address is set using an 8-position binary switch on the driver
board. For single-line displays, the address will typically be “1”. For Parking Garage
displays with several levels, the top display is often set to address “1” and the others
are set to “2”, “3” etc. The address will be displayed each time the display powers
up.
Digit Circuit Board: The LEDs are mounted to a circuit board, which mounts to the
back of a digit panel. Problems with individual digits, segments or LEDs may require
accessing or replacing this board.
Host/Primary: The host display contains the host driver which relays signal directly
from the DataMaster controller on its Signal IN terminals. It is the only driver
connected to the temperature/photo sensor. The Signal OUT terminals are used to
connect the client driver. The host driver is selected by inserting the “Protocol-4”
plug into the protocol jack.
LED (light emitting diode): LEDs are high-intensity, low-energy lighting units.
Mirror/slave: receives a signal from the master but does not have a driver.
Power Supply: Converts AC line voltage from the load center to low DC voltage for
one or more digit circuit boards.
Protocol plug: The “Protocol-4” plug is inserted in the 5-pin protocol jack to select
the host driver for a set of host-client displays.
1.5 Daktronics Nomenclature
To fully understand some Daktronics drawings, such as schematics, it is necessary to
know how various components are labeled in those drawings. You will find this
information useful when trying to communicate maintenance or troubleshooting
efforts.
The following labeling formats might be found on various Daktronics drawings:
• “TB _ _” denotes a termination block for power or signal cable.
• “E _ _” denotes a grounding point.
• “J _ _” denotes a power or signal jack.
• “P _ _” denotes a power or signal plug for the opposite jack.
Finally, Daktronics part numbers are commonly found on drawings. Those part
numbers can be used when requesting replacement parts from Daktronics Customer