TM 10--3510--221--24
0018 00--1
DISPLAY DOES NOT COME ON OR HAS SCRAMBLED
CHARACTERS
0018 00
THIS WORK PACKAGE COVERS:
Troubleshooting Display Does Not Come On Or Has Scrambled Characters Fault
INITIAL SETUP:
Maintenance Level
Materials/Parts
Unit
Tools and Special Tools
Equipment Conditions
Tool Kit, General Mechanics (Item 1, WP 0272 00)
Power must be applied at main control
Multimeter (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) are
connected.
Is > 4 VDC present?
YES Go to step 10.
NO Check wire connections between PCB10A and TB9. Repair as necessary.
