Daktronics AB-1600-1.5,2.5 - Manual (Page 57)

Maintenance & Troubleshooting 4-15
Transformers
The Daktronics T-1109 transformer delivers 21.48 volts to the lamp from the 5V Buck winding
when supplied with 120 volts. As shown in the table in Section 3.3, expected lamp life decreases
dramatically as the voltage to the lamp increases. Lamp life is approximately 12,004 hours using
the T-1109 transformer as stated above.
The transformer is capable of adjustment if the line voltage varies enough to significantly reduce
expected lamp life.
Contact Daktronics customer service if adjustment is required.
Additional Venus 1500 System Components
The circuit boards addressed in this sub-section only apply to Venus 1500 systems.
The Venus 1500 controller is comprised of a controller board (also called a control board) and an
MDC board in a common enclosure. These circuit boards are part of every Venus 1500 control
system. In addition, a fiber optic board or a modem board might also be found within the
enclosure.
The following table explains which circuit boards are found in RS/232, RS/422, fiber optic and
modem systems.
Format Circuit Boards Present
RS/232 Controller board and MDC Board
RS/422 Controller board and MDC Board
Fiber Optic Fiber Optic Board, Controller board and MDC Board
Modem Modem Board, Controller board and MDC Board
The following information addresses 1) the product and MDC boards, 2) the modem board, 3) the
fiber optic board and 4) the master-echo board found within the fan control enclosure in the
master Venus 1500 display.
Controller Board and MDC
Board
Figure 58 illustrates the controller board
with the attached MDC board. If a fiber
optic or modem board is in use, it will
mount to the controller board at the
location indicated.
Figure 58: Venus 1500 Controller Board & MDC Board