TM 11-5820-921-40-1
If complete removal of Tune Load PWB Assembly 1A2A1 is required, tag all leads on the board
3.
before unsoldering from pwb. Take care not to damage the coaxial leads as they are unsoldered
from the pwb.
To remove ALC PWB Assembly 1A7A2, use a No. 1 Phillips screwdriver to loosen and remove the
4.
four retaining screws, lockwashers, and flatwashers that secure ALC PWB Assembly 1A7A2 to the
frame assembly. Pull pwb away from frame assembly, tag all leads before unsoldering them from
pwb.
3-133. DISASSEMBLY OF
TUNE DETECTOR MODULE ASSEMBLY
1A10
Refer to figure 3-49. Use a No. 1 Phillips screwdriver to loosen and remove the two retaining screws
1.
that secure the cover to the frame assembly.
Lift cover up and off the two location tabs on top of the frame assembly.
2.
Use a No. 1 Phillips screwdriver to loosen and remove the four retaining screws, lockwashers, and
3.
flatwashers that secure Tune Detector PWB Assembly 1A10A1 to the frame assembly. Carefully
pull the pwb away from the frame assembly. Access for component replacement is now available.
If complete removal of Tune Detector PWB Assembly 1A10A1 is required, tag all leads before
4.
unsoldering from pwb.
3-134. DISASSEMBLY OR RF
DRIVER MODULE ASSEMBLY
1A11
Refer to figure 3-51. Use a No. 1 Phillips screwdriver to loosen and remove the two retaining screws
1.
that secure the cover to the frame assembly. Lift the cover up and off the two location tabs on top
of the frame assembly.
Use an 11/32 nutdriver (deepwell) to loosen and remove the three retaining nuts (8-32UNC-2B,
2.
plain-hexagon) and lock-spring washers that secure transistors 1A11A1Q1 through Q3 to the frame
assembly.
Use a No. 1 Phillips screwdriver to loosen and remove the five retaining screws, lockwashers, and
3.
flatwashers that secure Driver Module PWB Assembly 1A11A1 to the frame assembly. Carefully
pull the pwb away from the frame assembly. Access for component replacement is now available.
If complete removal of Driver Module PWB Assembly 1A11A1 is required, tag all leads before
4.
unsoldering them from pwb.
3-135. DISASSEMBLY OF
STATIC POWER INVERTER ASSEMBLY
1A12
Refer to figure 3-53. Use a No. 1 Phillips screwdriver to loosen and remove the two cover retaining
1.
screws. Remove the cover.
Use a No. 1 Phillips screwdriver to loosen and remove the two board retaining screws, lockwashers,
2.
and flatwashers. Also loosen and remove the four board plate retaining screws, lockwashers, flat-
washers and hex nuts on the side of the frame assembly.
Carefully pry Inverter Module PWB Assembly 1A12A1 and Transistor Mounting Bracket away from
3.
frame assembly. Access for component replacement is now available.
Note
Remove any traces of heat sink compound from transistor mounting bracket
and frame assembly. The heat sink compound (P/N 755017A4412) will be
replaced at reassembly.
4.
If complete removal of Inverter Module PWB Assembly 1A12A1 is required, tag all leads before
unsoldering from pwb.