
3.08 When replacing 403700 circuit breaker,
apply electrical insulating
tape
in place
of
shrink tubing.
E. Diode Assembly
3.09
To
remove 403750 diode assembly
(Fig. 33 and 35):
(a) Remove 334874
nut,
82832 star washer,
403767 cable assembly and 405891
insulator from 403725 right side
heat
sink.
(b) Disconnect 403750 diode assembly lead
from 410012 circuit card.
(c) Remove 403750 diode assembly and
405891 insulat.or from heat sink.
3.10 When replacing 403750 diode assembly
to
403725 right side heat sink, apply
402640
heat
conducting paste between
two
405891 insulators and heat sink (see Fig. 33
and 35):
F. 5 V Regulator Circuit Card
3.11 To remove 410012 circuit card (Fig. 33
and 35).
(a) Disconnect the following from t.,10012
circuit card:
Black leads from Q1 transistor terminals,
Green lead
of
403750 diode assembly,
Blue lead
of
403735 thermal sensor
assembly,
White lead
of
403767 cable assembly.
(b) Disconnect green and red leadsfrom P112,
J115 and terminals 8 and 9
of
output
terminal block
of
410010 circuit card.
(c) Cut RM43679 tie.
(d) Remove three transistors and insulators
from 403725 right side heat sink.
(e) Remove 410012 circuit card.
ISS 3, SECTION 582-214-700
3.12 When replacing 410012 circuit card:
(a) Replace 403708 insulators when reassem-
bling transistors
to
403725 right side
heat sink.
(b) Apply 402640 heat conducting paste
between 403708 insulator (under 403712
transistor only) and 403725 right side heat
sink.
(c) Apply approximately 6Ibs-per-inch
torque
when installingtransistormountingscrews.
Overtightening will damage transistor sockets.
(d) Make sure leads from 410012 circuit card
to
410010 circuit cards are twisted
as
shown in Fig. 33.
(e) Position P113 connector, so
that
blue
lead in connector is toward
top
of
power
supply when
heat
sink is in upright position.
G. ±12 V Regulator Circuit Card
3.13 To remove 410011 circuit card (Fig. 34
and 36):
(a)
Cut
RM43679 tie.
(b) Disconnect black, red and green leads
from
Jl20,
J118,
and
J1190f
the
410010
circuit card.
(c) Disconnect black, red and green leads
from
output
terminal block; terminals 5,
6 and 7
of
the 410010 circuit card.
(d)
Disconnect P122 connector from 410011
circuit card.
(e) Remove two transistors from 403726
left side
heat
sink.
(f) Using long-nose pliers, compress 403737
support and gently .lift circuit card from
power supply.
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