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Figure 2-4. AN/PRR-9(XE-9) switch wiring diagram.
Up
TM-11-5820-549-50-1 Receiving Set Radio AN PRR-9 Radio AN PRR-9 (XE-9) Manual
Next
Section II. DEPOT ALINEMENT
TM 11-5820-549-50-1
CHAPTER 3
DEPOT REPAIRS AND AUNEMENT
Section I. DEPOT REPAIRS
the braid. Place fresh braid over the joint as it becomes
3-1. General Parts Replacement Techniques
saturated with solder. Use this procedure to remove as
much of the solder as possible. Use small scalpel blade
The  AN/PRR-9(XE-9)  is  a  transistorized  unit,
to free the lead from the copper circuit and straighten it,
constructed compactly.  Be extremely careful when
using small longnose pliers.
replacing parts and assemblies.
a. Whenever wires are removed, replace with the
3-2.
Removal of AN/PRR-9(XE-9) Jack Housing
same lead dress and length as the wires which were
Assembly (fig. 3-1)
removed. Always examine replaced wires to be sure
insulation is in good condition so that accidental
grounding of the conductor will not take place.
Remove the jack housing assembly for repair of the
headset jack A2A1J5 or battery connector A2A1P3 as
b. Use a pencil-type soldering iron with a 25watt
follows:
maximum capacity. This equipment is transistorized. If
a. Remove the electronic unit assembly A2 from
only ac-operated irons are available, use an isolating
the receiver case.
transformer.  Do not use a soldering gun; damaging
voltages can be induced in components.
b. Remove the hexagonal nut A2A1H1 and
protective cover A2A1MP1 from the headset jack.
c. Check any soldering iron, before use, for shorts
to the tip. If a short is found, do not use the iron on this
c. Remove the two flathead screws A2A1H2 that
equipment.
attach the jack housing assembly to the front plate
assembly.
d. When soldering or unsoldering integrated circuit
leads,  work  quickly;  excessive  heat  may  cause
d. Remove hexagonal nut A2A1H2 from the
permanent damage to the integrated circuit or circuit
battery plug connector A2A1P3.
board.
e. Work the assembly loose to reach parts, as
e. To remove solder from printed circuit board
required.
pads and connectors, use a piece of untinned copper
f. When replacing the jack housing assembly, be
braid, approximately 1/8-inch in width.  Put a small
sure insulation is not damaged where wires go through
amount of flux on copper braid. Place end of braid on
front plate assembly.
top of the joint. Place soldering iron tip on top of the
braid. Solder then should start to flow from the joint into
3-1

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