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Section IV. REPAIR OF ELECTRONIC INTERFACE ASSEMBLY (EIA)
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TM-9-1270-212-14-P Fire Control Subsystem Helmet Directed XM128 P/N 2277716-00 NSN 1270-00-122-9449 Manual
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Figure 5-5. Electronic interface subassembly from HSSXM128 - exploded view (sheet 1 of 2)
TM 9-1270-212-14&P
NOTE
(5) Verify that replacement transformer T3 (13) has
a soft-tempered,  coated, AWG 24, solid bus wire,
There are two antirotation pinholes in poten-
conforming to QQ-W-343, between terminals 2 and 3 and
tiometer mounting chassis (43) for each resistor
between terminals 3 and 7. Verify that the bus wire
(44). The tangs on each resistor are pressed
between terminals 3 and 7 is sleeved.
into these pinholes during installation.
(6) Spot bond the wire bundles with adhesive
(5) When installing resistors R1 through R4 (44) in
conforming to MIL-A-8623, type 1, in the same manner as
potentiometer mounting chassis (43), coat the threads close
they were originally anchored.
to the chassis wall with sealing compound conforming to
MIL-S-22473, grade T (primer) and grade A. Fill the
b. HSS XM136 EIA.
antirotation pinholes with a mixture of Stycast®2651 and
catalyst number 9.
(1) Remove items (1, fig. B-11) through (82) except
items (6), (7) (8). (28), (31). (39), (49), (67), (68), (76),
(6) Verify that replacement transformer T2(17) has
(71), and (79). Unsolder and mark leads where necessary.
a soft-tempered, coated, AWG 24, uninsulated, solid bus
Mounting hardware for variable resistors R1 through R4
wire, conforming to QQ-W-343, between terminals 2 and 3.
(39) is bonded in place.
(7) Verify that replacement transformer T3 (13) has
NOTE
a soft-tempered, coated, AWG-W-343, solid bus wire,
conforming to QQ-W-343, between terminals 2 and 3 and
Resistors R9 and R10 mounted on TB1 (64)
between terminals 3 and 7. Verify that the bus wire
and resolver B1 (39) are a matched set. The
between terminals 3 and 7 is sleeved.
resistors are furnished with the resolver.
(8) Spot bond the wire bundles with adhesive
(2) Carefully break the adhesive seal that anchors the
conforming to MIL-A-8623, type 1 in the same manner as
wire bundles to the replacement components.
that in which they were originally anchored.
(3) Disassemble and assemble azimuth bias circuit
5-22. EMI Filter Disassembly and Assembly (fig. B-12).
card A14 as shown in figure B-13.
Remove items (1) through (5). Unsolder and mark leads
(4) Assemble items (82, fig. B-11) through (1) in
as necessary. Assemble in reverse disassembly sequence.
reverse disassembly sequence.

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