TM 11 6625-1168-12
4-1. Scope of Maintenance
The maintenance duties assigned to the operator and organizational maintenance personnel are listed below,
together with a reference to paragraphs covering the specific maintenance function. Replacement of parts and
circuit adjustments are authorized only at GS or depot maintenance categories. The operator and
organizational maintenance personnel shall perform only preventive maintenance duties and replacements
within their scope of ability and tool allowance.
a. Daily preventive maintenance checks and services (para 4-5).
. Weekly preventive maintenance checks and services (para 4-6).
c. Quarterly preventive maintenance checks and services (para 4-7).
4-2. Tools, Materials and Test Equipment Required
The tools, materials, and test equipment required for organizational maintenance are listed in appendix B.
4-3. Operator's Preventive Maintenance
Preventive maintenance is the systematic care, servicing, and inspection of equipment to prevent the
occurrence of trouble, to reduce downtime, and to assure that the equipment is servicable.
a. Systematic Care. The procedures given
in paragraphs 4-4 through 4-9 cover routine system systematic
care and cleaning essential to proper upkeep and operation of the equipment.
b. Preventive Maintenance Checks and Services. The preventive maintenance checks and services charts
(paras 4-5, 4-6, and 4-7) outline functions
to be performed
at specific intervals. These checks and services are
to maintain Army electronic equipment in good serviceable and operating condition. To assist operators in
maintaining combat serviceability, the charts indicate what to check, how to check, and what the normal
conditions are. The References column lists the illustration, paragraph, or manual that contains detailed repair
or replacement procedures. If the defect cannot be remedied by the operator, higher category of maintenance
or repair is required. Records and reports of these services must be made in accordance with the requirements
set forth in TM 38-750.
4-4. Preventive Maintenance Checks and Service Periods
Preventive maintenance checks and services of the test set are required daily, weekly, and quarterly. Para-
graphs 4-5, 4-6, and 4-7 list daily, weekly, and quarterly preventive maintenance checks and services. Daily
checks and services must be performed-
a. When the equipment is initially installed.
b. Before connection for testing or use.
c. At least once each week if equipment is maintained in standby condition.
4-5. Daily Preventive Maintenance Checks and Services
Exterior surfaces ...................
Clean the front panels and display faces...............................................................
Cables and connectors .........
Check interface, power cables and connectors for damage and proper