Daktronics AF-3150-20-R,A - Manual (Page 41)

Maintenance and Troubleshooting
4-3
3. The power supplies are set to 3.6 VDC. Power supplies are preset. Contact
Daktronics Customer Service for the proper settings.
4.4 Service and Diagnostics
Reference Drawings:
Power Termination Box................................................ Drawing A-129227
Controller, Galaxy, 8-conn J-1087 ............................... Drawing B-177838
Schematics............................................................... Refer to Appendix A
Comp. Layout Diagram; ........................................... Refer to Appendix A
The following sub-sections address servicing of the following display components:
• transformer, RFI filter
• controller
• modules, drivers and power supplies
The sub-sections also address any diagnostic LEDs, fuses and signal/power
connectors found on the unit. On the Schematics and Component Layout
Diagrams, the components are denoted as follows.
Component… Denoted As… Location…
Filter and
Transformer 0A-1289-4005 Inside the power termination box
Controller 0A-1229-0005 Depends on the size of the display. (usually
behind the bottom left module, or module
one row above)
Modules Squares A101 through A309
0A-1266-2004-Red
0A-1266-2005-Amber
Over entire face of the display (includes
driver)
Power Supplies 0A-1289-4011
or
0A-1289-4012
Behind modules (refer to your display’s
Schematic and Component Layout
Diagram)
Light Detector 0A-1247-0003 Behind\below the bottom left module
Modem 0P-1279-0003 Close to the controller, usually in the left end
of the display. Refer to the display’s
Schematic
Fiber Board 0P-1127-0024 Close to the controller, usually in the left end
of the display. Refer to the display’s
Schematic
RS422 Surge
Card 0P-1146-0031 Close to the controller, usually in the left end
of the display. Refer to the display’s
Schematic