Daktronics Fuelight FL-3000 and FL-4500 Series 36 and 48 Petroleum Price Display and Cash/Credit Display - Manual (Page 46)

40 Maintenance and Troubleshooting
9.2 Troubleshooting
This chart lists some symptoms that may be encountered with the displays. For each symptom, possible
causes 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.
9.3 Multi-Pylon Troubleshooting Steps
Complete the following steps – that may correct communication errors – before calling for service/support:
1. Locate the breaker panel for each pylon.
2. Power down each pylon (in no particular order).
3. Power down control equipment.
4. Verify all equipment is turned off.
5. Power up all pylons while DM-100 remains off.
Note: To assure proper addressing, the pylon with communications tied to it (Host) should be
powered up
last. The additional pylons (Clients) are to be powered up first and in any order.
6. Allow about 30 seconds for the pylons to boot up.
Symptom/Condition Possible Cause Possible Solution
Entire display and/or face will not enter
boot cycle on power up.
Power incorrectly installed.
Check the power LED (DS7) on all
drivers. If not lit, connect power as
described in
Section 3.
Multiple-line sign with all lines showing
the same prices, or data appears on the
wrong line.
Display line addressing not set
correctly.
Set a different line number
for each display on each face
(refer to
Section 5.1) and the
communications quick guides to
address display correctly.
Garbled display.
Driver malfunction.
Check driver to make sure signal
cables are routed to the correct
digits.
Cycle power to the display
Replace driver.
Digit malfunction. Replace the digit.
Digit will not light.
Cable to the digit broken or
disconnected.
Check cable by switching it to a
different driver output.
Replace the cable.
Poor contact at driver connection. Clean the contacts.
Driver malfunction.
Replace the driver.
Digit failure. Replace digit.
Segment or several LEDs will not light.
Poor contact at driver connection.
Clean the contact or replace the
harness.
Broken or disconnected cable
between driver and digit.
Replace the cable.
Broken LEDs. Replace the segment or digit.
Display shows a default price. The price hasn’t been changed.
Use the control method to set the
price on the display.