tive actions indicated, higher category maintenance or
a. Paragraph 4-5 specifies checks and services that
repair is required. Records and reports of these checks
must be accomplished weekly and under the conditions
and services must be made in accordance with the
requirements set forth in TM 38-750.
(1) When the equipment is initially installed.
4-4. Preventive Maintenance Checks and Services
(2) At least once each month if the equipment is
not used periodically.
Preventive maintenance checks and services for the
b. Paragraph 4-6 specifies checks and services that
test facilities set are required weekly and quarterly.
must be performed on a quarterly basis.
Weekly Preventive Maintenance Checks and
Check all components of the test facilities set against the
list of components supplied; give particular attention to
Clean the transit case exterior with a clean, lint-free cloth
containing cleaning compound, Fed. Stock No. 7930-395-
9542 (or equivalent), to remove accumulated oil film or
dust. Then, dry all surfaces thoroughly with a clean lint-
free cloth. Inspect all painted surfaces for spots, chips,
cracks, and corrosion. Touch up or refinish the surface
Connectors and adapt-
a. Check for broken pins, and replace connectors where
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
Check for cuts, kinks and breaks. Replace all defective
Check controls on hybrid attenuator and front panel test
adapter. Replace defective controls and knobs.
Handles and latches
Inspect handles and latches on the transit case and handles
Higher category main-
of the hybrid attenuator.
During operation. be alert to any unusual performance or
4-6. Quarterly Preventive Maintenance Checks
and Services Chart
See that all publications are complete, serviceable, and
DA PAM -310-4
Check DA PAM :10-4 to determine if new applicable
TM 38-750 and DA
MWO's must be applied immediately. All NORMAL
MWO' must be scheduled.
See that equipment is clean.
Check all surfaces for evidence of rust and corrosion. Re-
move rust and corrosion and paint bare spots
1. Cables for proper mating.
2. Smooth operation of ATTENUATOR dial on hybrid
3. Extender boards for proper seating in iff set printed
circuit (pc) board connectors.
4. Pc board extractors for proper mating in holes of
1. Check hybrid attenuator insertion losses.
2. Check hybrid attenuator VSWR.
3. Check insertion losses of cables W14/W15 and W39.