NAVELEX EE 181-AA-OMI-050/E121 DT546 M9442
Table 5-1. Troubleshooting Procedures - Continued
indication should change to over 100,
000 ohms. Pull the TAS plunger all the
way out. The meter indication should
drop to its former level. Close cover.
Repeat this test on the remaining
Use a straightedge across the
Processor chassis. Slowly raise the
straightedge. After a movement of
less than 1/4 inch (0.635 cm), the
meter indication should change to over
100,000 ohms. Replace cover.
If the TAS in any unit fails, replace the
PC board in the failing unit.
To remove Processor PC board, tag
and disconnect wires from TB1 and
TB2. Remove screws that secure PC
board to chassis. Lift PC board out of
To install new PC board, orient board
so the terminal strips are adjacent to
conduit entrance holes. Secure the PC
board to chassis with screws. Connect
wires to TB1 and TB2.
sensitivity control per instructions in
To remove Detector PC board, tag and
Disconnect red and black pick-up
assembly wires from PC board.
Remove screws that secure board to
chassis. Remove PC board.
To install new Detector PC board,
orient board so the terminal strip is
adjacent to the conduit entrance hole.
Secure the board to the chassis with
screws. Connect wires to TB1, and
connect red and black pick-up
assembly leads to the marked
terminals on the board. Adjust