REPLACEMENT OF ROTARY SWITCHES.

T.O. 12P4-2APX-142

NAVAIR 16-35C6280-1

TM 11-5841-268-25

Step 1. Make sure wire is securely connected to contact

815. REPLACEMENT OF ROTARY SWITCHES.

pin.

NOTE

Step 2. Lubricate wire cavities in back face of connector

In Control, Transponder Set C-6280(P)/APX,

insert with a thin film of DC-200 Silicone Oil, or equivalent.

Serial No. 1 through 130, manufactured under

Contract AF33(657)- 14550, rotary switches

Step 3. Locate pin in insertion tool coaxially with tool.

S201 and S202 were installed with the index

Step 4. Align contact pin with appropriate hole in rear

key rotated approximately 45 from the hori-

face of insert, taking care to avoid damaging the insert.

zontal and were marked with a yellow dot on

Step 5. When pin has entered rear seal portion of insert,

the rear wafer. When one of these switches is

maintain alignment of pin and tool parallel to and coaxially

to be replaced, the new switch should be in-

stalled with the index key in the horizontal po-

with the contact pin hole in the insert.

sition and the 45 offset hole should be plugged.

Step 6. Insert contact pin to full depth. (Insertion force

is less than 5 pounds.) The seating of the contact pin in the

816. To remove and replace either one of the two rotary

retention collet should produce an audible sound.

switches (29 and 32, FO3; 30 and 37, FO-4; 28 and 31,

FO5), remove the plastic light panel (paragraph 83) and

Step 7. Keep insertion tool aligned with insert hole, and

the rear panel assembly (paragraph 85). Then, proceed

remove tool from connector.

as follows:

812. REPLACEMENT OF CONNECTOR J201. When the

Step 1. Remove mounting nut and lockwasher (30, 31, or

connector mounting flange or the silicone-rubber insert of

33, 34, FO3; 31, 32, or 38, 39, FO4; 29,30, or 32,33,

the connector is damaged, the connector must be replaced.

FO5).

Either the original contact pins may be reused or new pins

Step 2. On C-6280A(P)/APX, remove two screws (33 and

may be installed. Replace the connector as follows:

40, FO4) and remove nut plate assembly (34 or 41). Re-

Step 1. Remove all contact pins from connector (para-

move two nuts (36 or 43) and lift off switch bracket (35 or

graph 89).

42); then, replace nuts (36 or 43) to hold switch together.

Step 2. If new contact pins are to be installed, disconnect

Step 3. Gently move switch so terminals are accessible.

wires from old pins and attach them to the new pins (para-

Step 4. See wiring diagram FO2 and solder wires to ap-

graph 810).

propriate terminals of replacement switch.

Step 3. See wiring diagram FO2 for wire colors and in-

Step 5. On C-6280A(P)/APX, install switch bracket (35

sert pins in the new connector insert (paragraph 8-11 ) ac-

or 42, FO-4) on switch with nuts (36 or 43).

cording to wire color.

Step 6. Install replacement rotary switch on subassembly

mounting panel with mounting nut and lockwasher.

813. REPLACEMENT OF TOGGLE SWITCHES.

Step 7. On C-6280A(P)/APX, replace nut plate assembly

814. To remove and replace any of the eight toggle

(34 or 41, FO-4) and screws (33 or 40).

switches (41, 42, 43, 44, 45, FO3; 51, 52, 53, 54, 55,

FO4; 40, 41, 42, 43, 44, FO5), remove the plastic light

Step 8. Apply a small amount of Lubricant 551D7-44 to

switch actuating mechanism, and turn switch several times

panel (paragraph 83) and the rear panel assembly (para-

to distribute lubricant. Remove any excess lubricant.

graph 85). Then, proceed as follows:

Step 1. Unsolder wires from switch to be replaced.

Step 9. Replace the plastic light panel and rear panel as-

sembly (paragraphs 83 and 85).

Step 2. On subassembly mounting panel (59, FO3; 65,

FO-4; 61, FO5), remove mounting nut and washer from

8-17. REPLACEMENT OF THUMBWHEEL SWITCHES.

toggle switch and remove switch.

8 18. To replace any of the six thumbwheel switch assem-

Step 3. Install replacement switch on subassembly mount-

blies (56 or 57, FO3; 59 or 60, FO-4; 58 or 59, FO5),

ing panel with nut and washer.

remove plastic light panel (paragraph 83) and rear panel

Step 4. See wiring diagram FO2, and solder appropriate

assembly (paragraph 85), and proceed as follows:

wires to switch terminals.

Step 1. Unsolder wires from thumbwheel switch assembly

to be removed.

Step 5. Replace the plastic light panel and rear panel as-

Step 2. Remove screw (53, FO3: 62, FO4: 55, FO5)

sembly (paragraphs 83 and 85).

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