Daktronics C44 - Manual (Page 49)

Maintenance & 4-1
Troubleshooting
Section 4: Maintenance &
Troubleshooting
IMPORTANT NOTES:
1. Disconnect power before any repair or maintenance
work is done on the display!
2. Any access to internal display electronics must be made
by qualified service personnel.
3. Disconnect power when the display is not in use.
4.1 Troubleshooting the System
Reference Drawing:
Display Transmitter Card............................................................. Drawing A-55998
Two basic diagnostics programs come with the C-44. These programs help to locate minor
problems with the system. The scoreboard diagnostics program will test all the lit digits on a
scoreboard to determine if they are all lighting. The Win Light diagnostics program will
determine if all the Win Lights are operating properly.
Scoreboard Diagnostics: To activate the scoreboard diagnostics program press
<CTRL><F1> followed by <CTRL><S>. The screen will show the numbers that are being
sent to the respective fields on the scoreboard. If there are parts of a number that are not
lighting, either a bulb has to be replaced or something is wrong with the scoreboard. Refer to
the scoreboard user’s manual for instructions on how to change a bulb.
Win Light Diagnostics: To activate the Win Light diagnostics program press <CTRL><F1>
followed by <CTRL><W>. The screen will show the sequence that the Win Lights should
follow when they light. If a Win Light does not light, either a bulb has to be replaced or
something is wrong with the board. Refer to the scoreboard maintenance and troubleshooting
manual for instructions on how to change a bulb.
Exit to DOS: The key combination <CTRL><F1> followed by <CTRL><O> will allow the
operator to exit the C-44 race timing program should it become necessary to perform any DOS
commands. Note: Exiting the timing program in this manner will end the current timing
session and is intended to aid troubleshooting efforts as directed by Daktronics customer
service.
P.C. Fails to Boot Correctly: If the P.C. fails to boot or boot correctly, verify all cable
connections. Try to reboot the P.C. using the power switch. If this fails to start it correctly,
try powering down the isolation interface, and then try to power up the P.C. The isolation
interface may be sending a signal back to the P.C. that is confusing the start-up sequence. If
this procedure fails to work, contact a technician at Daktronics prior to continuing trouble-
shooting.
If there are any other problems with the C-44 system (that cannot be solved with the
troubleshooting hints below) contact the Daktronics customer service department. Phone
1-877 / 605-1115.