Daktronics CH-1036V - Manual (Page 18)

Maintenance &
Troubleshooting
3-2
3.3 Digit Segmentation
Reference Drawing: Segments, 4x7 Lamp Matrix Digit.................. Drawing A-37685
Refer to Drawing A-37685. In a digit, certain lamps always go on and off together. These
groupings of lamps are knows as segments. Each digit has eight segments, referred to by
letters A through H.
3.4 Fuses
Reference Drawing: Lamp Driver, 16 Col. w/ Fan.......................... Drawing A-37070
Refer to Drawing A-37070. The lamp driver has 17 fuses. There is one fuse to protect each
digit circuit. F1 through F16 are type AGC-10 and are located near each output connector
under the driver’s metal cover. The other lamp driver fuse, F17, is type AGC-1/2 and it
protects the driver’s logic circuit and fan.
3.5 Schematic
Reference Drawing: Schematic, 1 Driver Display .......................... Drawing A-46754
The schematic diagram in Drawing A-46754 shows the power and signal inputs into the
display and to the lamp driver.
3.6 Troubleshooting
Observed Problem Possible Cause
One lamp won’t light
• Burned-out lamp
• Broken wire behind digit
Digit segment won’t light
• Broken wire
• Poor contact at driver connector
• Internal driver malfunction
Entire digit won’t light
• Broken wire (black)
• Poor contact at connector, pin 7
• Fuse blown in driver
Half the display won’t light
• Service breaker tripped
• 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