120
Spring (MP115)
110
Bearing (MP20)
101
Light baffle (MP6)
121
Shutter blade (MP10)
111
Retaining ring (MP38)
102
Screw (H20)
122
Capping blade (MNfP7)
112
Retaining ring (MP68-72)
103
Capping link (MP32)
123
Spacer (MP92)
113
Spacer (MP377)
104
Retaining ring (MP73)
124 Spacer (MP93)
114
Spacer (MP378)
105
Spacer(laminated)
125
Spacer (MP94)
115
Bushing (MP24-25)
(MP100)
126
Spacer (MP95)
116
Trunnion (shutter blade)
106
Bearing (MP16-17)
127
Stud (MP63)
(MP121
107
Spring (MP112)
128
Screw (self-locking)
117
Screw (H58-59)
108
Trunnion (capping link)
(MP83)
118
Diaphragm link (MP58)
(MP12:
129
Housing (MP55)
119
Spacer (M'P111)
109
Screw (H5657)
Figure 3-3(4)-Continued.
b. Replacement. Replace an aec board assembly
(5) When assembling transistor Q1 torque the
nut between 25 inch/pounds, minimum and 30
by following the procedures of paragraph 319b, except
inch/pounds, maximum.
that the aec board assembly is installed in the top slide
(6) Connect the components with No. 20
of the chassis and with the component side facing down.
3-22. Removal and Disassembly of Scan Heat Sink
AWG, Type S, tempered soft or drawn and annealed, tin
Assembly
coated wire. Cover with insulation sleeving No. 20
From
To
(1) Remove the aec board assembly (4),
control board assembly (5), and scan board assembly
CR1-A ....................................CR2-C
(6).
CR2-C....................................E1 (R1)
(2) Remove nut (12), saddle washer (13),
CR3-A ....................................CR4-C
screw (4), and clamp (15) securing the harness to the
CR1-C....................................CR3-C
front panel. Break the harness lacing.
CR3-C....................................VR1-C
(3) Remove the two screws (10) and washers
VR1-C ....................................Q1-C
(11) securing electrical connector (9).
VR1-A ....................................E3 (R2)
(4) Remove the four screws (17) securing the
E4(R2) ...................................Q1-E
heat sink assembly (16) to sub-classes (36).
CR2-A ....................................CR4-A
(5) If isolation of a malfunctioning part is
b. Installation (fig. 3-8). Installation of the heat sink
assembly is a reversal of the removal procedures of
the test procedures.
b. Disassembly (fig. 3-9).
3-24. Removal and Replacement of Heat Sink
(1) As the disassembly of the heat sink is
obvious, no detail procedures, except the following, are
a. Removal.
described.
(2) Before disconnecting an electrical part,
(1) Tag and remove wires from connector P8
tag each wire so that correct reconnection can be made.
(9).
(2) Remove two screws (10) and washers
3-23. Reassembly and Installation of Scan Heat Sink
(11) securing connector (9) to the bracket (29).
Assembly
(3) Remove the bracket (29) by removing the
a. Reassembly (fig. 3-9).
two screws (30).
(1) Reassemble the scan heat sink assembly
b. Replacement.
to the extent parts were removed and conform to the
(1) Rewire connector P8 (9).
following special instructions.
(2) Complete the installation in the reverse
(2) Apply silicone grease, DC340 to the
sequence in which the parts were removed. Apply
contacting surfaces of the heat sink (7) and the following
glyptal to the threads of the attaching screws.
listed parts: Mica washer (11) of diodes VR1 and CR1
through CR4 (8). Mica washer (3) of transistor Q1 (1).
3-25. Removal and Disassembly of Power Supply
(3) Apply glyptal to the threads of attaching
Assembly
screws.
(4) When assembling rectifiers CR1 through
CR4 and voltage regulator VR1, torque the nuts
(1) Remove the aec board assembly (4),
between 10 inch/pounds, minimum and 13 inch/ pounds,
control board assembly (5), and scan board assembly
maximum.
(6) from the sub-classes (36) to prevent damage.
3-15
TM 11-6720-242-35