Table 5-1. Troubleshooting Procedures - Continued

TM 5-6350-264-14&P-11

NAVELEX EE 181-AA-OMI-120/E121 C-7359-40-1

T.O. 31S9-2FSS9-1-11

Trouble

Probable cause

Corrective Action

21. (Cont)

Loss of regulation

cable clamp from power

on 27 vdc charge

supply cover. Remove

supply (Cont).

screws and lock washers

and remove terminal board

cover from TB1 on power

supply. Tag and discon-

nect all interconnecting

wires from TB1 and TB2.

Lift power supply at left

end and lower right end off

of ledge. Remove power

supply from cabinet.

(6)

To install new twenty-five-

zone Monitor Cabinet pow-

er supply, position power

supply in cabinet. Connect

all interconnecting wires to

TB1 and TB2. Position ter-

minal board cover on TB1.

Install cable clamp on pow-

er supply cover. Connect

interconnecting wires to

TB3. Install mounting

screws. Turn on external

ac power by turning on cir-

cuit breaker. Close and

latch mounting racks. Close

and lock cabinet door.

HIGH VOLTAGE is used in the operation of this equipment. DEATH ON CONTACT may result if

personnel fail to observe safety precautions. Learn areas containing high voltage in each

piece of equipment. Be careful not to contact high-voltage connections when installing or

operating this equipment. Never work on electronic equipment unless there is another person

nearby who is familiar with the hazards of the equipment and competent in administering

first aid.

Refer to figures 5-1, 5-2, and 5-3 for all test points found in troubleshooting table 5-1. Figure 5-4 is the wiring

diagram for the one-zone Monitor Cabinet, and figures FO-1 and FO-2 are wiring diagrams for the five and twenty-five-

zone Monitor Cabinets. Step-by-step troubleshooting procedures, including Trouble, Probable cause, and Corrective

action, are listed in table 5-1.

5-42