TM 55-4920-244-14
of insulation. Inspect insulation for signs of over-
tacting accessible terminals and replaced on an as
heating in cable harness.
required basis.
c. Cleaning.
e. Repair.
(1) Replace printed circuit board if
(1) Use a soft brush to remove ac-
any of the following conditions exist:
cumulations of dust and dirt.
(a) Separation of plies in board
(2) Use a cloth dampened with dry
material.
cleaning solvent (item 1, table 1-1 ) to remove
(b) Cracks, over 1/8 inch in
foreign matter.
length, or extending into component mounting
d. Inspection and Testing.
area or extending into a printed conductor path.
(1) Inspect printed circuit board for
(c) Carbonized paths between
cracks, separation, carbonized paths between ele-
components, printed conductors, or mounting
ments, and security of components.
areas.
(2) Inspect for cold solder joints and
(d) More than one printed con-
corrosion at all solder terminals and resistor
ductor cut, damaged, or separated from board.
leads.
(e) Separation of terminals from
(3) Inspect all components for dam-
board.
age, broken leads, or signs of overheating.
(2) Single printed conductors may
(4) Use a decade resistance bridge or
be replaced with point to point wiring if termi-
other precision resistance checker to make sure
nals at each end of defective printed conductor
all resistors are within tolerance.
will accommodate additional wire. Use No. 20
AWG or larger insulated copper wiring for re-
(5) Inspect attaching cable harness
placement purposes.
on deck assembly for broken wires and condition
