MONTHLY PREVENTIVE MAINTENANCE

TM 11-6625-3056-12

4-5

. PORTABLE INSTALLATIONS

The TS-3981 can be used as a portable test set inside a shelter:

Ground

On rear panel, press in cap on ground lug to expose internal slot.

Connection

Place heavy-gage ground wire (not supplied) in slot and release pressure on cap.

Connect the other end to suitable ground. In the shelter this ground can be an equipment

rack. Outside the shelter this ground can be a ground rod.

Power

Connect power cable to a 115-volt power source.

Connection

4-6.

MONTHLY PREVENTIVE MAINTENANCE

Introduction

Item No: Order in which check or service is performed. The number in this column shall also be

used as a source of item numbers for the TM Number Column on DA Form 2404, Equipment

Inspection and Maintenance Worksheet, when recording results of PMCs.

Item To Be Inspected: The portion of the TS-3981 to which the check or service applies.

Procedure: Procedure to be followed for the check or service.

Equipment

a. Cleaning compound, trichlorotrifluoroethane.

Required

b. Cheesecloth.

Banana patch cords (2 ea), 6 in. minimum length patch cords terminated in banana plugs.

Field wire may be substituted.

Trouble-

Items 4 thru 10 (end) are also troubleshooting procedures.

shooting

Each item serves as a foundation for the next. Therefore,

Procedure

items 4 thru 10 must be performed in the order given. If

hey are not, the probable cause information is invalid.

Item

Item To Be

Procedure

No.

Inspected

MWO

Compare the Modification Work Order in DA PAM 310-1 for the TS-3981, if any, to that on the

TS-3981.

If latest modification(s) has (have) not been installed:

Perform or request the modification.

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