Table 5-1. Troubleshooting Procedures - TM-5-6350-264-14-P-40017

TM 5-6350-264-14&P-4

NAVVEI, EX EE 181-AA-OMI-050/E121 DT546 M9442

TO 31S9-2FSS9-1-4

NOTE

(1)

Inspect the equipment for evidence of

physical damage.

Touchup paint is recommended instead of refinishing

(2)

Inspect terminal strips for clean and

whenever practical.

secure connections.

(6)

Inspect all metal surfaces intended to be

(3)

Inspect all wiring and cabling for worn or

painted for condition of finish and legibility

frayed insulation and broken wires.

of panel lettering.

(4)

Inspect all resistors for discoloration due

Refer to figures 5-1 and 5-2 for all test points

to overheating.

called out in troubleshooting table 5-1. Step-

by-step troubleshooting procedures, including

(5)

Inspect the complete subsystem for the

Trouble, Probable Cause, and Corrective

presence of dirt, corrosion, moisture, and

Action, are listed in table 5-1.

bits of wire or solder inside the housing.

NOTE

Troubleshooting procedures listed in table 5-1 may require more than one person to perform corrective action.

Covers should be removed as necessary to perform troubleshooting procedures.

Never disconnect a wire without first marking that wire to assure proper reconnection.

Table 5-1. Troubleshooting Procedures

Trouble

Probable cause

Corrective action

1. Constant

a. Low voltage to

alarm.

Processor.

a. Set multimeter to dc volts. Connect

positive meter lead to TB1-7 and

negative meter lead to TB1-8. Meter

should indicate 20 2 vdc.

b. If voltage is below tolerance, discon-

nect wires from TB1-7 and TB1-8

and measure voltage on these wires.

(1) If voltage on wires is below

tolerance, refer to TM 5-6350-

264-14/10 & P on J-SIIDS

Control Unit.

(2) If voltage at Control Unit is good,

check wires for open circuits

and shorts-to-ground per in-

structions in TM 5-6350-264-

14/1.

c. If voltage on wires is good, replace PC

board.

5-2