Daktronics CH-1018H - Manual (Page 21)

Maintenance & Troubleshooting 3-3
• Main fuse blown
• Poor contact at main power connection
• P18 disconnected
Entire display won’t light • Power disruptions
• Poor signal connection
• Driver logic fuse blown
• Control not connected to display
• P20 disconnected
Segment stays lit • Broken wire behind digit
• Internal driver malfunction
Garbled display
• Control malfunction
• Internal driver malfunction
If a problem is observed in one digit, the cause may be isolated by swapping plugs on the
driver (connect the plug from the digit into a different jack). If the same digit shows the same
problem, the cause may be in the digit or the wiring. If the problem moves to another digit,
then the cause is probably an internal driver problem.
Use a volt meter at driver inputs to determine if power is being supplied to the driver. An
ohmmeter can be helpful in finding broken wires and bad connections. Internal electronic
problems must be correct by Daktronics or an authorized service center.
3.6 Replacement
Parts
Part Name or Description Type Part Number
Lamp Driver 0A-1033-0122
J-Box, CHTS-300 Timer 0A-1067-0056
Fuse, Lamp Driver, 10A AGC-10 F-1006
Fuse, Driver Logic, 1/2A AGC-1/2 F-1000
Digit Lampbank, 18” 4x7 0A-1027-0071
Digit Screen, 18” 4x7 0S-1064-0001
Socket, Med. Base X-1046
Lamp, 30W Frosted DS-1182
Lamp, 30W Clear 30A15 DS-1076
Lamp, 55W Clear Flood 55PAR38 DS-1101
Lamp, 85W Amber Flood 85PAR38 DS-1184
Lamp, 85W Green Flood 85PAR38 DS-1185
Lamp, 85W Red Flood 85PAR38 DS-1186
3.7 Unit Exchange/Replacement Procedure
Daktronics unique exchange program offers our clients the quickest, most economical way of
receiving product repairs. If a component fails, Daktronics will send the customer a
replacement. The customer, in turn, sends the failed component to Daktronics. This not only
saves money but decreases the time the display is inoperable. Daktronics offers repair and
return on a timely basis; in urgent situations, every attempt is made to ship by the fastest
transit method available.
1. Packaging for Return: Package and pad the item well to prevent damage during
shipment. Electronic components, such as printed circuit boards, should either be