T O 35C2-3-442-2
P-8-627-34
T M - 0 7 4 6 4 A - 3 5 TM 5-6115-457-34
4. Inspect base of printed circuit
WARNING
board for cracks, warping, burned or dis-
colored areas and illegible stenciling.
Insulating Compound, MIL-I-46058 is
flammable and slightly toxic to eyes,
d. Inspect sheet metal parts for bent
skin and respiratory tract. Eye and
corners, distortion, cracks, tears and
skin protection required. Good gen-
dents.
eral ventilation is normally adequate.
e. Check terminal lugs for security and
condition.
f. Inspect relay socket for damage,
shorts to case, and surrounding pins.
g. Inspect for damaged indicator lenses.
5. Solder joints and/or component
h. Check fuse for continuity.
leads must not project more than O. 094
6 - 5 4 . REPAIR.
inch beyond surface of board.
a. Repair or fabricate fault locating in-
dicator box wiring harness according to
6. After replacement of components
on the printed circuit boards, coat the
boards with protective coating, conforming
b. Repair or fabricate fault locating
indicator box heating wire in accordance
to Military Specification MIL-I-46058,
with table 6-4.
grade S, type PUR, 0.005 minimum thick-
c. Replace indicator lenses, if cracked.
ness. Air bubbles should be prevented
d. Replace fuse if defective.
during coating so that legibility of identifica-
tion or information markings are not im-
e. When replacing feed thru terminals,
paired. The coating shall be applied so
swage in place.
that it anchors the components to the board.
f. Repair printed circuit board as
Terminals utilized for connection to exter-
follows :
nal circuits shall not be coated.
1. Restencil all illegible reference
designations.
g. Straighten dented or distorted sheet
metal parts using proper tools. Blend in
WARNING
repaired area with suitable abrasive paper.
Avoid breathing fumes generated by
Prime and touch up damaged painted sur-
unsoldering/soldering. Eye pro-
faces.
tection is required.
6-55. REASSEMBLY.
CAUTION
Refer to figure 6-11 and reassemble
Prolonged use of soldering equip-
fault locating indicator box in the reverse
ment could cause damage to com-
order of index numbers assigned. Pay par-
ponents due to excessive heat.
ticular attention to the following:
2. Repair printed circuits by solder-
ing a jumper wire across defective area.
3. Replace all defective components.
NOTE
4. Solder replacement components
on the printed circuit boards using solder
Mount connector (J12) with keyway
conforming to Federal Specification QQ-S-
in top position.
571 Sn 60.
6-27
Change 8
