© AXION TECHNOLOGIES LTD. TROUBLESHOOTING
LCD DISPLAYS INCOHERENT MESSAGES
CHECK PASSES FAILS/CORRECTIVE ACTION
STEP 1
Shut off system and reboot GO TO STEP 2
STEP 2
Transfer database Replace Control Unit
5.1.3. SIGN PROBLEMS
NO POWER TO SIGN
CHECK PASSES FAILS/CORRECTIVE ACTION
STEP 1
EDSS connection
GO TO STEP
2
Connect power cable or repair faulty
connector
STEP 2
Sign connector wiring
GO TO STEP
3
Rewire connector
STEP 3
Front Sign Junction board Sign fuse Replace blown fuse or Junction board
SIGN DOES NOT DISPLAY
CHECK PASSES FAILS/CORRECTIVE ACTION
STEP 1
Test LEDs as per Menu 12 procedure GO TO STEP 2 GO TO STEP 3
STEP 2
Download database and check if
problem remains unsolved
GO TO STEP 3 GO TO STEP 3
STEP 3
Sign power supply GO TO STEP 4
Refer to Section 5.1.3 "No power to
sign"
STEP 4
All internal cables GO TO STEP 5 Replace faulty cable(s)
STEP 5
Sign LED-DRVR-PS-CPU board GO TO STEP 6
Replace LED-DRVR-PS-CPU board
as per Parts Manual instructions
STEP 6
LED-DRVR-PS boards GO TO STEP 7
Replace defective LED-DRVR-PS
board(s) as per Parts Manual
instructions
STEP 7
Sign operation Replace Sign
SIGN DISPLAYS ONLY VERTICAL LINES
CHECK PASSES FAILS/CORRECTIVE ACTION
STEP 1
Download database GO TO STEP 2
STEP 2
Sign LED-DRVR-PS-CPU board
Replace Sign LED-DRVR-PS-CPU
board
SIGN DISPLAYS INCOHERENT MESSAGES
CHECK PASSES FAILS/CORRECTIVE ACTION
STEP 1
Sign connectors and internal cables
GO TO STEP
2
Replace faulty cable(s) or connector(s)
as per Parts Manual instructions
STEP 2
LED-DRIVER-PS boards
GO TO STEP
3
Replace defective LED-DRVR-PS
board(s) as per Parts Manual
instructions
STEP 3
Sign LED-DRVR-PS-CPU board
Replace Sign LED-DRVR-PS-CPU
board as per Parts Manual instructions
User Manual (Revision A) Document No.: 3042145 Page 50
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