TM 11-5820-890-30-4
3-31. REPLACEMENT
Tools:
Soldering kit
Expendable supplies:
Alcohol
OF VOLTAGE REGULATORS.
Cross tip screwdriver, #1 point
Cotton swabs
Solder
References:
Paragraph 3-26 for removal and installation of test adapter from maintenance group lid.
Figure 3-12 for illustration of voltage regulators.
ITEM
ACTION
REMARKS
REMOVAL
a. Two screws (57) and
Use #1 point cross tip screwdriver.
Iockwashers (56)
Remove and retain two screws and lock-
washers securing voltage regulator (55,
58, or 59) to power supply mounting
bracket (63). See figure 3-12 (sheet 3).
Note positions of all wires soldered to
voltage regulator (55, 58, or 59). Use
soldering kit. Desolder all wires from volt-
age regulator. See figure 3-12 (sheet 3).
Pull loose from mounting socket (87) and
b. Wires
c. Voltage regulator
(55, 58, or 59)
INSTALLATION
d. Wires
mounting bracket
voltage regulator.
Use soldering kit.
(63). Discard defective
Solder all wires to cor-
e. Voltage regulator
(55, 58, or 59)
rect positions on replacement voltage
regulator (55, 58, or 59).
Insert leads of replacement voltage regu-
lator through mounting bracket (63) and
into mounting socket (87). If insulating
film (54) is required with voltage regulat-
or, make sure film is on regulator before
installing it on mounting bracket (63).
f. Two screws (57) and
Use #1 point cross tip screwdriver. Install
Iockwashers (56)
and tighten two retained screws with lock-
washers through voltage regulator (55, 58,
or 59) and into mounting socket (87) se-
curing them to mounting bracket (63).
NOTE:
When replacing voltage
regulator U1 or U3 (55 or
59), remove and retain
insulating film (54) from
between regulator and
mounting bracket.
Before and after soldering,
clean solder joints with cot-
ton swabs and alcohol.
These were removed in
step a.
3-101
