NAVELEX EE 181-AA-OMI-050/E121 DT546 M9442
Table 5-1. Troubleshooting Procedures - Continued
If the resistance indication is not present
or if the voltage indication is present,
replace the Detector PC board.
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 gain
control per instructions in TM 5-6350-
BEFORE touching any gain or
sensitivity controls, note their
d. Gain or sensitivity
settings so that they may be
controls set too low.
returned to their original positions
Check settings of Detector gain and
Processor sensitivity controls to
ensure that they are not set to
Disconnect wire from TB1-7.
multimeter to ohms, and connect leads
e. Bad Processor PC
to the plus (+) side of C13 and TB2-2.
Turn the sensitivity control as far as it
will go in each direction.
sensitivity control is turned, the meter
approximately 2, 500 ohms.