TM 10--3510--221--24
0095 00--1/2 blank
VREF(S) OUT OF RANGE
0095 00
THIS WORK PACKAGE COVERS:
Troubleshooting VREF(S) Out Of Range 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. Use maintenance menu to examine status of VOLTAGE REFERENCE HI and LO (WP 0010 00).
Does status indicate VOLTAGE REFERENCE is in .77 to 9.22 VDC range?
YES Go to step 2.
NO Go to step 5.
2. Position SW2 to OFF then back to ON.
3. Observe operator panel display.
Does ”VREF(S) OUT OF RANGE” reappear?
YES Go to step 4.
NO Return to normal operation.
4. Open door on main control enclosure. Verify SW1 and SW2 are ON.
5. Check for > +11 VDC power across PCB1 terminals (J1--2) and (J1--3).
Is voltage > +11 VDC?
YES Go to step 6.
NO Go to NO +/--12 VDC POWER AVAILABLE FAULT (WP 0101 00).
6. Check for > --11 VDC power across PCB1 terminals (J1--4) and (J1--3).
Is voltage > --11 VDC?
YES Replace ANALOG PCB1 (WP 0210 00).
NO Go to NO +/--12 VDC POWER AVAILABLE FAULT (WP 0101 00).
END OF WORK PACKAGE
