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 TM 55-1905-223-24-18-2
REPAIR
Repair of receiver module RE-39240-7/M1-M7A-38100 consists of replacing gasket (21, 24), meter
assembly (4), preformed packing (9, 13), toggle switch (10, 12), sonalert alarm (14), card guides (38),
printed circuit connectors (39), power supply (33), flasher module (34), circuit card assembly (35),
simulator float (40), variable wire wound resistor (41), knob (42), nonmetallic grommet (68), power
transformers (65, 66), and electrolytic fixed capacitor (61).
ASSEMBLY
a. Position receiver module on a clean, flat surface.
b. Power supply. (Figure 3-42, (Sheet 4).
(1) Install nonmetallic grommet (68).
(2) Run electrical leads through nonmetallic grommet.
(3) Position terminal block (70) on support mount.
(4)
Install two machine screws (49), lockwashers (50), and plain hex nuts (51) and secure
terminal block to support mount.
(5) Connect electrical leads to terminal block (70). Remove tags.
(6) Attach identification markers (69) and (67).
(7) Position power transformer (65) over support mount.
(8) Install four machine screws (23), lockwashers (26), and plain hex nuts (27) and secure power
transformer (65) to support mount.
(9) Connect electrical leads to power transformer (65) using four terminal lugs (8). Remove
tags.
(10) Repeat steps (7) through (9) to install power transformer (66).
(11) Position terminal block (63) over support mount.
(12) Install two machine screws (49), lockwashers (50), and plain hex nuts (51) and secure
terminal block to support mount.
(13) Position tie mounting device (54) on support mount and secure tie mounting device using
terminal lug (8).
(14) Connect cable ties (53) to cable harness.
(15) Connect electrical leads to wire hook-up (52). Remove tags.
(16) Attach terminal marker strip (64) to terminal block (63).
3-173
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