Daktronics CH-2024V - Manual (Page 19)

Section 3 : 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.
3.1 Lamp Replacement
Reference Drawing: Digit Service .................................................. Drawing A-27674
The primary service required by the CH-2024V display is to replace burned-out lamps. Refer
to Drawing A-27674 for an illustration of how to access the digit lamps for replacement.
Standard replacement lamps for the digits are 120V, 25W frosted medium base and may be
obtained at your local store or directly from Daktronics, part number DS-1029. Some displays
may be equipped with 120V, 30W reflector type 30R20 lamps, Daktronics part number DS-
1126.
The Lap/Time indicators use 120V, 55W clear flood lamps, type 55PAR38, Daktronics part
number DS-1101.
The Status indicators use 120V, 85W flood lamps, type 85PAR38. The Daktronics part
numbers are as follows:
Color Part Number
Amber DS-1184
Green DS-1185
Red DS-1186
Do not use lamps larger than those originally installed in the display. Using higher powered
lamps will likely cause fuse failures in the display and could exceed the current levels that the
display's circuits can safely handle.
3.2 Lamp
Driver
Reference Drawings: Lamp Driver, 16 Col. W/ Fan ....................... Drawing A-37070
Component Locations, CH-2024V .............. Drawing A-46539
In the display, the task of switching lamps on and off is performed by the lamp driver.
Drawing A-46539 in Section 2 shows the location of the lamp drivers in the display.
Drawing A-37070 is an illustration of the lamp driver and the fuses located in it.
The lamp driver has 22 connectors providing power and signal inputs and outputs to the
digits. The functions of these connectors are as follows:
Connector No. Function
1-16 Outputs to digits
Maintenance & Troubleshooting
3-1