TM 10--3510--221--240018 00--1DISPLAY DOES NOT COME ON OR HAS SCRAMBLEDCHARACTERS0018 00THIS WORK PACKAGE COVERS:Troubleshooting Display Does Not Come On Or Has Scrambled Characters FaultINITIAL SETUP:Maintenance Level Materials/PartsUnitTools and Special Tools Equipment ConditionsTool Kit, General Mechanics (Item 1, WP 0272 00) Power must be applied at main controlMultimeter (Item 2, WP 0272 00) enclosure (WP 0010 00).1. Position SW2 to OFF then back to ON.2. Observe display at operator panel A.Is PRESS TO START completely displayed?YES Go to step 3.NO Go to step 5.3. At operator panel A press top menu selection switch.4. Observe display at operator panel B.Is WAITING FOR SYSTEM A completely displayed?YES Return to normal operation.NO Go to step 5.5. Check for > 5 VDC across terminals (+5) and (DCOM) on TB9 where wires (347 and 355) are connected.Is > 5 VDC present?YES Go to step 6.NO Go to NO +5 VDC POWER AVAILABLE FAULT (WP 0102 00).6. Position SW2 to OFF.7. Open door on both operator panels.8. Position SW2 to ON.9. Check for > 4 VDC across terminals (+5) and (DCOM) on PCB10A where wires (347 and 355) areconnected.Is > 4 VDC present?YES Go to step 10.NO Check wire connections between PCB10A and TB9. Repair as necessary.
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