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 ARMY TM 5-6675-309-14
MARINE CORPS TM 08840A-14/1
8. Place PSTS front panel (51, figure 8-6,
10. Install 20 screws (49) and washers (50)
sheet 1) in PSTS instrument case (1).
securing PSTS front panel (51) to PSTS
Align mounting holes.
instrument case (1).
9. Install 20 screws (49) and washers (50)
(21) Diode CR40. Remove and replace diode CR40
securing PST front panel (51) to PSTS
(161, figure 8-6, sheet 4), as follows:
instrument case (1).
(a) Removal.
(22) Diodes CR54, CR55, CR90, and CR101. Re-
1. Remove 20 screws (49, figure 8-6, sheet 1)
move and replace typical diode CR54 (151,
and washers (50) securing PSTS front
panel (51) to PSTS instrument case (1).
(a) Removal.
Remove PSTS front panel far enough to
provide access to diode CR40 (161, figure
1.
Remove 20 screws (49, figure 8-6, sheet 1)
8-6, sheet 4).
and washers (50) securing PSTS front
panel (51) to PSTS instrument case (1).
2.
Unsolder wire from CR40 (161).
Remove PSTS front panel far enough to
3.
Remove two screws (159) and washers
provide access to diode CR54 (151, figure
(160) securing diode plate (165) to relay
8-6, sheet 4).
bracket no. 2 (183). Remove diode plate
2.
Tag and unsolder wires from diode CR54
(165) far enough to provide access to
connections and mounting hardware for
(151). (Do not unsolder wires from lug.)
diode CR40 (161).
3.
Remove nut (158), lockwasher (157),
washer (156), two mica washers (153 and
4. Remove nut (169), lockwasher (168),
washer (167), two mica washers (163 and
155), heat-shrinkable tubing (154), and
lug (152) securing diode CR54 (151) to
166), heat shrinkable tubing (164), and
relay bracket no. 1 (138). Remove diode
lug (162) securing diode CR40 (161) to
CR54.
diode plate (165). Remove diode CR40
from diode plate. Do not unsolder wires
(b) Replacement.
from lug.
1.
Cut a length of heat-shrinkable tubing
(b) Replacement.
(137) (MIL-I-23053/5A) sufficient to insu-
1. Cut a length of heat-shrinkable tubing
late diode CR54 (151) stud from relay
bracket no. 1 (138).
(164), (MIL-I-23053/5A) sufficient to in-
sulate diode CR40 (161) from diode plate
2.
Install lug (152), mica washer (153), and
(165).
heat-shrinkable tubing (154) on dode
2. Install lug (162), mica washer (163), and
CR54 (151) stud. Shrink heat-shrinkable
tubing.
heat-shrinkable tubing (164) on stud of
diode CR40 (161). Shrink the heat-shrink-
3.
Place diode CR54 (151) in relay bracket
able tubing.
no. 1 (138).
3. Place diode CR40 (161) in diode plate
4.
Install mica washer (155), washer (156),
(165).
lockwasher (157), and nut (158) securing
4. Install mica washer (166), washer (167),
diode CR54 (151) to relay bracket no. 1
(138).
lockwasher (168), and nut (169) securing
diode CR40 (161) to diode plate (165).
NOTE
NOTE
Check that there is no continuity between
conductive materials separated by mica
Check that there is no continuity between
conductive materials separated by mica
washers to ensure mica washer has not
washers to ensure mica washer has not
been damaged during assembly.
been damaged during assembly.
5.
Solder wires to diode CR54 (151).
5. Solder wire to diode CR40 (161).
Place PSTS front panel (51, figure 8-6,
6.
6. Place diode plate (165) on relay bracket
sheet 1) in PSTS instrument case (1).
no. 2 (183), Align mounting holes.
Align mounting holes.
Install 20 screws (49) and washers (50)
7.
7. Install two screws (159) and washers (160)
securing PSTS front panel (51) to PSTS
securing diode plate (165) to relay
bracket no. 2 (183).
instrument case (1).
8-122
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