4-7. Organizational Quarterly Preventive Maintenance Checks and Services Chart
Publications . . . . . . . . . . . .
Check to see that all publications are complete, serviceable, DA Pam 310-4.
Modifications . . . . . . . . . . . Check DA Pam 310-7 to determine if new applicable MWO's TM 38-750 and DA
have been published. All URGENT MWO'S must be ap-
plied immediately. All NORMAL MWO's must be
Spare parts . . . . . . . . . . . . Check all spare parts (operator and organizational) for App B.
general conditions and method of storage. There should
be no evidence of overstock, and all shortages must be on
(a) Remove the six screws attaching the
signal conditioning assembly to the chassis (fig.
a. Exterior Cleaning. The exterior surfaces
should be clean and free of dust, dirt, and grease,
(b) Place the signal conditioning am-
(1) Remove dust and loose dirt with a clean,
sembly upright in the mounting slots provided
(2) Remove dust and dirt from the input
c. Interior Cleaning. The interior of the in-
jacks with a soft brush.
strument should be clear and free of dust and
(3) Remove grease and ground-in dirt from
dirt. Remove "any accumulated dust or dirt with
the case with a soft cloth dampened with a mild
low-pressure clean, dry air. Reassemble the in-
solution of detergent or soap and lukewarm water.
strument in reverse order of disassembly.
Care should be taken in cleaning the
readout window. An adhesive is used
to bond the window to the front panel
Do not use steel wool for rust removal.
and too much pressure may separate
Minute particles of steel wool may enter
the window from the panel.
the chassis of the instrument and cause
(4) Clean the front panel, readout window,
harmful arcing, electrical shorting, or
and pushbuttons with a soft cloth dampened
with a mind solution of detergent or soap and
Remove rust and corrosion from metal surfaces
by lightly sanding them with fine sandpaper.
b. Access to Components. Perform the fol-
Brush two thin coats of paint on the bare metal
lowing steps to gain access to internal compon-
to protect it from further corrosion. Refer to
ents for inspection and cleaning.
the applicable cleaning and refinishing practices
specified in TB 746-10.
(1) Cover removal.
(a) Turn fuse holder cap counterclock-
wise and remove it from the body of the fuse
4-10. General Troubleshooting Information
Operator and organizational troubleshooting this
(b) Remove the two screws attaching bot-
equipment is based upon the operational check
tom cover to chassis and remove bottom cover.
contained in the daily preventive maintenance
(c) Remove the two screws attaching the
checks and services chart. To troubleshoot the
top cover to chassis and remove top cover.
equipment, perform all functions in the chart
(2) Shield removal.
an abnormal condition or result is observed.
(a) Remove the four screws attaching the
When an abnormal condition is observed, note
bottom shield and remove shield.
the item number and turn to the corresponding
(b) Remove the four screws attaching the
top shield and remove top shield.
Perform the checks and corrective actions indi-
(3) Signal conditioning assembly mounting.
cated in the troubleshooting chart. If the cor-