Daktronics CH-1024H - Manual (Page 20)

Maintenance &
Troubleshooting
3-2
Connector No. Function
1-16 Output to digits
17 Signal input
18 Power input for outputs 1-8
19 Power input (120V) for driver logic
20 Power input for outputs 9-16 (120V)
24 Dim option selector
Drawing A-46464 in Section 2 shows the numbers on the digits that refer to the lamp driver
output connector wired to each digit
3.3 Digit Segmentation
Reference Drawing: Segments, 4x7 Lamp Matrix Digit ............. Drawing A-37685
In a digit, certain lamps always go on and off together. These groupings of lamps are known
as segments. Each digit can have up to eight segments, referred to by letters A through H.
Drawing A-37685 shows which connector pin number is wired to each digit segment and the
wiring color code used throughout the display.
3.4 Schematic
Reference Drawing: Schematic, Power & Signal....................... Drawing A-38788
Driver Enclosure, Power & Signal ............. Drawing A-37915
Drawing A-38788 shows the power and signal inputs into the display and to the lamp driver.
The component numbers correspond to those shown in Drawing A-37915 in Section 2.
3.5 Troubleshooting
This section lists some symptoms that may be encountered with the scoreboard. For these
symptoms, possible cause and corrective actions are indicated. This list does not include
every possible problem, but does represent some of the more common situations that may
occur.
Symptom/Condition Possible Cause or Corrective Action
One lamp won’t light • Burned-out lamp
Scoreboard will not light. • Console not connected or poor connection.
• No power to the control console.
• No power to the scoreboard.
• Bad relay or poor relay connection in signal
circuit.
• Driver logic fuse (F17) blown.
• P17, P19 or P20 unplugged.
Half of the scoreboard will not light. • Circuit breaker tripped at service panel.
• Driver malfunction.
• Poor signal contact at main power connection.
• Driver logic fuse blown
Garbled display. • Control console malfunction.