TM 10--3510--221--24
0101 00--1
NO +/-- 12 VDC POWER AVAILABLE
0101 00
THIS WORK PACKAGE COVERS:
Troubleshooting No +/--12 VDC Power Available 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).
NOTE
If PCB1 or card cage do not have +/--12 VDC use this procedure to find the problem. If
PCB2 and PCB4 through PCB6 do not have +12 VDC use NO +12 VDC POWER
AVAILABLE (WP 0097 00) to find the problem.
1. Open door on main control enclosure. Verify SW1 and SW2 are ON.
2. Check for 110 VAC power between terminals (L1) and (L2) on power supply PS2.
Is 110 VAC power present?
YES Go to step 3.
NO Check wire connections between PS2 and TB2. Repair as necessary.
3. Check for +12 VDC between terminals (+12) and (ACOM) on PS2.
Is +12 VDC present?
YES Go to step 4.
NO Replace power supply PS2 (WP 0233 00).
4. Check for --12 VDC between terminals (--12) and (ACOM) on PS2.
Is --12 VDC present?
YES Go to step 5.
NO Replace power supply PS2 (WP 0233 00).
5. Check fuse indicators for fuses F7 an F8.
Is either fuse indicator on?
YES Go to step 6.
NO Go to step 10.
6. Position SW1 to OFF.
7. Replace fuse at location where indicator was on (WP 0224 00).
8. Position SW1 to ON.
