TM 11-5820-921-40-1
Align all power amplifier cable connectors before mating and fastening.
Make sure power is off before performing any cleaning or inspection
procedures.
1.
Inspect the unit externally for cleanliness and for signs of damage to connectors, painted surfaces,
indicator lamps, controls, cables, meter, and attaching hardware. Check that all connections are
tight.
2.
Use a lint-free cloth dampened with technical isopropyl alcohol (Federal Specification MIL-I-10428)
to wipe and clean the power amplifier external surfaces. Use a small, non-metallic brush if
required.
3.
If scratches or extreme fading are noted on the power amplifier external surface, repaint
affected areas as follows:
a. Clean and prime affected areas with Primer (in accordance with Federal Specification
TT-E-485).
b. Touch up green areas with Marine Corps Green, Color No. 23 (in accordance with Federal
Specification TT-E-485).
c. Touch up yellow-nomenclated areas with Semigloss Yellow, Color No. 23538 (in accord-
ance with Federal Standard 595).
3-16. The following procedures describe the disassembly necessary to reach and service the power ampli-
fier modules, printed circuit boards, and components. This procedure is arranged so that any assembly can
be removed individually for maintenance, in a minimum amount of time. Refer to figure 3-2 for locations
of parts referred to in the procedures.
Make sure power is off before performing these disassembly procedures.
REMOVAL OF POWER AMPLIFIER COVER ASSEMBLY
1.
Refer to Detail A of figure 3-2. Use a 1/4-inch nut driver to loosen the 14 captive cover retaining
screws that secure the power amplifier cover to the case assembly.
2.
Carefully lift the cover from the case assembly so as not to damage the sealing gasket attached to
the cover.
REMOVAL OF METER BOARD PWB ASSEMBLY 1A1
3-18.
1.
Refer to Detail B of figure 3-2. Pull upward on the inboard portion of the PWB handle ejectors on
each side of Meter Board PWB Assembly 1A1 to get the PWB loose from the socket on the card
cage assembly.
2.
Grasp the handle ejectors with both hands and lift straight up to remove the PWB.
