Daktronics AB-1600-1.5,2.5 User Manual

Page 58

Maintenance & Troubleshooting

4-22

DS3

Should blink when data is received from Venus 7000

DS4

All DS4 LEDs in data distributor will light and then count
sequentially through card addresses from 0 to 15.

Output Card Miscellaneous LEDs and Switches
DS5

Power LED should be ON

Board Address – Set in sequential order starting at 0.
Four output cards would be set 0, 1, 2, 3. Not 1, 2, 3, 4.

The fan controller expander board, Figure 57, is part of the data
distributor. Each of the LEDs on the fan control expander board
corresponds to a fan controller in the display. All the LEDs must be
ON for the display to operate. An OFF LED indicates a fan
controller is reporting a bad fan. At that point, check that fan
controller to determine which fan is failing.

The table below lists the connectors of the fan control expander
board along with their functions.

Connector

Function

Power input from power supply

Input from fan controllers 1-8

Input from fan controllers 9-16

Input from fan controllers 17-24

Input from fan controllers 25-32

NOT EVERY DISPLAY

USES ALL INPUTS (J2-J5). ANY

UNUSED INPUTS MUST HAVE A

TERMINATOR PLUG.

Output fan controller reports to J1 on receiver board

15HC1

0P-1

190-0150

SN:

3456

07-64-97

REV

Power
LED

J1 Power
Input

Receiver Board

J1
Fans

J6
Output

Circuit
Board
Label

J2
Input

J3
Input

J4
Input

J5
Input

Figure 57: Fan Controller
Expander Board