Daktronics S-100/S-200 User Manual
Page 33
Maintenance &
Troubleshooting
4-6
Display Controller
The display controller is mounted to the rear of the display cabinet, near the top left corner as
viewed from the front for 0.7" displays (refer to Figure 35) and in the bottom left corner for 1.2"
and 2.1" displays. The controller receives information from the computer, interprets it and activates
the appropriate LEDs on the display.
The display controller also has a set of eight (8) switches by which an address can be set using
standard binary code (refer to Section 4.4).
To replace a failed controller, first disconnect all attached cables.
L
Take note of their orientation.
Remove all #6 connecting screws. If the address switches are used, take note of the switch
configuration and set the same address on the new controller. Attach the new controller using
#6-32 Screws.
Modem
If the display was ordered with a modem, its location depends
upon the display model: in 0.7" displays, it will be located in the
top frame of the display cabinet, near the display controller
(refer to Figure 36); or in 1.2" and 2.1" displays, it will be
mounted below the display controller. The modem is used in
lieu of a direct communication line with the computer.
The modem is held in place with the use of plastic rails known
as a “snap track.” To replace a failed modem, disconnect all
attached cables and carefully “snap” it out of the rails. Insert
the new modem by first laying one end into the rails of the
“snap track,” then pivot it up and snap into place (refer to
MDC
DIP Switches
DS1
+5V
DS2
RUN
DS3
Light Detector
J1 J2 J3
Temp
Sensor
Buzzer
Light
Detector
J2
J3
RS422
OUT
RS422
IN
POWER
IN
Figure 35: Display Controller
RS/232
OUT
J1 Phone
IN
Active
LED
Power
LED
Power
Connection
Figure 36: Modem
Figure 37: Installation of Modem