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TM 11-5820-890-30-5
3-30. REPLACEMENT OF VOLTAGE REGULATORS.
Tools:
Soldering kit
Cross tip screwdriver, #1 point
Expendable supplies:
Alcohol
Cotton swabs
Solder
References:
Paragraph 3-25 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
Using cross tip screwdriver, remove and
Iockwashers (56)
retain two screws and Iockwashers sec-
uring voltage regulator (55, 58, or 59) to
power supply mounting bracket (63).
b. Wires
Note positions of all wires soldered to
power supply CCA (65). Using soldering
kit, desolder all wires from CCA.
c, Voltage regulator
(55, 58, or 59)
INSTALLATION
d. Wires
e. Voltage regulator
(55, 58, or 59)
Pull loose from mounting socket (87) and
mounting bracket (63). Discard defective
voltage regulator.
See figure 3-12 (sheet 3).
See figure 3-12 (sheet 3).
NOTE:
When replacing voltage
regulator U1 or U3 (55 or
59), remove and retain
insulating film (54) from
between regulator and
mounting bracket.
Using soldering kit, solder all wires to
Before and after soldering,
correct positions on CCA.
clean solder joints with
cotton swabs and alcohol.
Insert leads of replacement voltage regu-
lator through mounting bracket (63) and
into mounting socket (87). If insulating
film (54) is required with voltage regulator,
make sure film is on regulator before
installing it on mounting bracket (63).
f. Two screws (57) and
Using cross tip screwdriver, install and
These were removed in
Iockwashers (56)
tighten two retained screws with lock-
step a.
washers through voltage regulator (55,
58, or 59) and into mounting socket (87)
securing them to mounting bracket (63).
3-100
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