that the equipment is in serviceable condition. The
4-5. Preventive Maintenance Checks and Services
charts indicate what to check, how to check, and what
the normal conditions are. The References column lists
Preventive maintenance checks and services for the test
the illustration, paragraph, or TM that contains repair or
facilities set are required both weekly and quarterly.
If the defect cannot be
a. Paragraph 4-6 specifies checks and services
remedied by performing the corrective actions indicated,
that must be accomplished weekly and under the
higher category of maintenance is required. Records
conditions listed below.
and reports of these checks and services must be made
(1) the equipment is initially installed.
in accordance with the requirements set forth in TM 38-
(2) At least once each month if the equipment
is not used periodically.
b. Paragraph 4-7 specifies checks and services
that must be performed on a quarterly basis.
4-6. Weekly Preventive Maintenance Checks and Services Chart
Check all components for the test facilities set against the list of components
supplied; give particular attention to small components
a. Clean the transit cases and accessory case exterior with a clean, lint free cloth
containing cleaning compound, Federal stock No. 7930-395-9542 (or equivalent), to
remove accumulated oil film or dust. Dry all surfaces thoroughly with a clean lint free
cloth. Inspect all painted surfaces for spots, chips, cracks, and corrosion.
b. Touch up or refinish the surface as required
a. Check for broken pins and replace connectors where necessary.
a. Higher category
b. Clean dirt from all contacts
a. Check for broken or bent pins and for cracks in the board..
a. Higher category
b. Replace all damaged extender boards, clean dirt from electrical contacts.
Check for cuts, kinks, and breaks
Replace all defective cables.
Check controls on hybrid attenuator 2A1, and interface adapter unit 1A1A1. Replace
defective controls and knobs
Inspect handles and latches on the transit cases, handles of the hybrid attenuator,
Higher category of
handles on the interface adapter unit, and handle and latches of accessory case.
During operation, be alert to any unusual performance or condition.
4-7. Quarterly Preventive Maintenance Checks and Services Chart
See that all publications are complete and current.
DA Pam 310-4
Check DA Pam 310-7 to determine if new applicable
TM 38-750 and DA Pam
MWO's have been published. All URGENT
MWO's must be applied immediately.
MAL MWO's must be scheduled.
See that equipment is clean.
Check all surfaces for evidence of rust and corrosion
Remove rust and corrosion and paint bare spots.
Check components for--
a. Cables for proper mating.
b. Smooth operation of ATTENUATOR dial on
hybrid attenuator 2A1.