TM9-4931-436-14&P
C
(3) Remove heat sink (29) and Q1
Battery Cases
ag
(27) together from standoff (28).
ai
aaz. Heat Sink Replacement (fig.
Display Housing
ay
aaaa
Regulator
(1) Install heat sink (29) with Ql
aa
Digital Motherboard, A2
(27) on standoff (28)
O
Analog Motherboard, A1
(2) Ensure that insulation tubing
is on Ql leads.
aaad. Front Panel Replacement (fig.
(3) Refer to figure 5-l. Use a
c-2). Perform steps in
paragraphs
listed below to replace components on
Solder 3 wires on Ql at El, El, and E3.
(4) Replace panel assembly (refer
aaaa. Regulator Assembly PWB Removal
NOTE
(1) Remove panel assembly (refer to
Replace panel assembly (3, fig.
(2) Remove connectors (513, 514).
(25 watts). Unsolder wires from regula-
tor assembly PWB (31).
Component
(4) Remove four screws (1) and
washers (2) securing PWB to front panel
f
Pushbutton Switches
(34). Remove PWB.
h
Toggleswitch
aaab. Regulator Assembly PWB Replace-
d
ah
Battery Cases
(1) Install regulator assembly PWB
aj
(31) on front panel (34).
az
Display Housing
(2) Apply primer (MIL-S-22473,
aaab
Regulator
grade T) and locking compound (MIL-S-
ab
Digital Motherboard, A2
22473, grade C) to threads of four
Analog Motherboard, A1
P
screws (1). Secure PWB with four
screws (1). Torque to 6-8 in.-lb.
aaae. Instrument Case Removal (fig.
(1) Open six latches on instrument
case (1). open case.
(4) Replace connectors (513, 514).
(2) Remove two screws (5) each,
(5) Replace panel assembly (refer
securing two staybolts to panel assem-
bly (3).
(3) Remove 14 screws (5) securing
Perform steps in paragraphs listed below
panel assembly to case (1). Remove
to remove components from front panel
panel assembly.
aaaf. Instrument Case Replacement
NOTE
(1) Install panel assembly (3) in
Remove panel assembly (3, fig.
instrument case (i). Secure with 14
screws (5). Torque to 17-20 in.-lb.
(2) Install two staybolts on panel
Secure with two screws (5)
assembly.
Component
(3) Close case. Secure six
e
Pushbutton Switches
latches.
Toggleswitch
g
6-14