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TABLE 7­1. CONTROL SWITCH CONTINUITY CHECKS­ -continued - TM-11-5841-268-250026
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TM-11-5841-268-25 Control Transponder Set C-6280(P)/APX C-6280A(P)/APX C-67171APX & C-7483/APX Manual
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REPLACEMENT OF ROTARY SWITCHES.


T.O. 12P4-2APX-142
NAVAIR 16-35C6280-1
TM 11-5841-268-25
SECTION VIII
REPAIR AND OVERHAUL INSTRUCTIONS
8-1. GENERAL.
two screws, nuts, and washers (27, 28, 29, FO­4). Remove
panel assembly.
8­2. This section describes the procedures for repairing
and overhauling Control, Transponder Set C-6280(P)/APX,
Step 4. When repair or replacement has been completed,
C-6280A(P)/APX, C-6717/APX, and C-7483/APX. Unless
reverse the procedures in Steps 1, 2, and 3 to reassemble
otherwise indicated, the procedures apply to all the trans-
rear panel assembly.
ponder set controls. The disassembly and reassembly proce-
8-7. REPAIR AND REPLACEMENT OF CONNECTOR
dures are keyed to the exploded views, FO­3, FO­4, and
J201.
FO­5. (Air Force, Navy) For complete part identification,
refer to the parts lists in Section X, which are also keyed to
8­8. GENERAL. When any of the contact pins or the con-
the exploded views. (Army) Refer to TM 11-5841-268-25P
tact receptacle of J201 (23, FO­3; 25, FO­4; 22, FO­5)
for parts identification.
has been damaged, the connector should be repaired or re-
placed as outlined in paragraphs 8­9 through 8­12. When
8-3. REPLACEMENT OF PLASTIC LIGHT PANEL.
one or more pins are replaced, the wire or wires must be
8-4. To remove and replace the plastic light panel, proceed
connected to the pins as described in paragraph 8­10. To
as follows:
provide access to the connector and wires, remove the rear
panel assembly (paragraph 8­6). Replace the rear panel as-
Step 1. Loosen setscrews (6 and 8, FO­3, FO-4, FO­5)
sembly when the repair or replacement has been completed.
in control dials (5 and 7) and remove control dials. "
8­9. CONTACT PIN REMOVAL. With connector J201 ac-
Step 2. Center all toggle switch handles.
cessible (paragraph 8­6), use extraction tool MS24256R20,
Step 3. On C-6280(P)/APX and C45280A(P)/APX, un-
or equivalent, and remove contact pin as follows:
screw and remove five panel light holders (9, FO­3, FO­4).
Step 1. Set spacer sleeve of tool for removal of male con-
Step 4. On C-6280(P)/APX, C-6717/APX, and C-74831
tacts.
APX, remove four screws (12, FO­3; 10, FO­5). On C-6280
Step 2. Place tool over pin and insert tool into pin cavity,
A(P)/APX, remove four screws (12, FO-4), nuts (13), and
taking care not to damage pin or connector insert.
washers (14).
Step 3. Exert a moderate force (from 5 to 10 pounds)
Step 5. On C-6717/APX and C-7483/APX, disconnect
axially to tool to release retention collet. (Spacer sleeve
P201 (part of light panel) from connector J202 (45, FO­5).
should shoulder at face of insulation when tool is inserted
Step 6. Gently lift off light panel (11, FO­3, FO­4;
to proper depth.)
Step 4. Push extraction plunger of tool so that pin is
Step 7. To install light panel, reverse procedures in Steps
moved to rear of insert.
1 through 6.
Step 5. Grasp pin or wire at rear face of insert and pull
8-5. REMOVAL AND REPLACEMENT OF REAR PANEL
out pin.
ASSEMBLY.
Step 6. Remove extraction tool from connector and set
8­6. To remove and replace the rear panel assembly, pro-
spacer sleeve of the tool forward in the last notch to protect
ceed as follows:
the end of the plunger guide.
Step 1. Loosen two turnlock fasteners on rear of unit and
8­10. CONNECTION OF WIRE TO CONTACT PIN. When
remove dust cover (1, FO­3, FO-4, FO­5).
a pin has been damaged, remove pin (paragraph 8­9) and
loosen crimp with pliers to remove wire. When a wire is
Step 2. Remove four screws and washers (18 and 19,
broken or damaged, strip insulation 3/16-inch from end of
FO­3; 20 and 21, FO­4; 17 and 18, FO­5). On C-6280A
wire (avoid nicking the wire or damaging the insulation).
(P)/APX, also remove two screws (26, FO­4). Move panel
Use crimping tool M1700A with MS3190 head, or equiva-
assembly (17, FO­3; 19, FO­4; 16, FO­5) away from
lent, to crimp the new pin to the wire.
chassis.
8­11. CONTACT PIN INSERTION. To insert contact pins
Step 3. On C-6280(P)/APX, C-6717/APX, and C-7483/
in J201, use insertion tool MS24256A20, or equivalent, and
APX, remove four screws, nuts, and washers (24, 25, 26,
FO­3; 23, 24, 25, FO­5). On C-6280A(P)/APX, remove
proceed as follows:
8-1


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