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Page Title:
Removal and Replacement procedures |
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|  TM 11-5831-201-20
Item No.
Symptom
Probable trouble
Remedy
--- --
Defective panel light - . . .
Replace panel light (para 3-13d).
Panel lamps do not light .
Defective control set -_ _ ---- ______
Replace control set ( para 3-13b ).
Defective system cabling - ---- ____
Check cabling (para 3-12).
With transmit-interphone
Defective control set ------ - _. . .
Replace control set (3-13 b).
selector switch set at
Defective system cabling . . .
Check system cabling (para 3 -12).
position 1, 2, 3, or 4, no
Defective system component
Refer to publication covering type of
sidetone is heard in
radio set installed in aircraft.
headset when speaking
into microphone.
With one RECEIVERS
Defective control set
Replace control set (para 3-13 b).
switch in ON position,
Defective system cabling
Check system cabling (para 3-12).
no receiver n o i s e i s
Refer to publication covering type
Defective system component
of radio se! installed in aircraft.
heard in headset.
Defective control set
When talking over inter-
Replace control set (para 3-13b).
phone system, no audio
is heard in headset.
Defective control set
Replace control set (para 313b).
No sidetone when talking
on private interphone
line,
Replace control set (para 3-13 b).
Defective control set
No transmission to other
Defective system cabling .
Check cabling para 3-12.
control set when talk-
ing on private inter-
phone line.
--.
lead at the plug connector end of the cable to
Connection
Pin Numbers
Item
--
check for continuity.
Audio common.
'19
-----
14
(6) After making the continuity check, re-
Keying line for transmitter No.
15
33
move all shorts at the opposite end of the cable
1.
Keying line for transmitter No.
34
_
-------
16
and replace the control set in its mounting.
2.
h. A i r c r a f t C a b l e P l u g C o n n e c t o r P i n T e r m -
Keying line for transmitter No.
35-.
.-
17
inution Chart. The chart below lists pins on the
3.
aircraft cable plug connector which connects to
Keying line for transmitter No.
1
__
------
18
4.
J 1 at the rear of the control set. The P i n c o l u m n
Output to transmitter No. 1.
19
19 and 24 .
lists only the pins used by the control set. The
Output to transmitter No. 2.
19 and 25
20
C o n n e c t i o n column lists the external equipment
Output to transmitter No. 3.
1 9 and 26 .
21
or circuit connected through the aircraft cable to
Output to transmitter No. 4.
19 and 28
22
t h e pins on the plug connector.
Hot mike control lead.
16 . . ------
23
Private interphone line.
19 and 6 -. -.
24
Aircraft Cable Plug Connections (.llates With Jl)
Output to alternate transmitter.
19 and 10 ----
25
--.
.
Connection
Item Pin Numbers
Microphone input.
3 and 22 . . . . . .
1
3-13. Removal and Replacement procedures
Earphone output.
5and23 . . .
2
a. General. Instructions for the removal of the
Interphone line.
19 and 8 ----
3
entire control set and for the removal of all
Input from receiver No. 1.
19 and 30 -..
4
Input from receiver NG. 2.
a u t h o r i z e d maintenance parts are given in b, c, d ,
19 and 31 ____
5
Input from receiver No. 3.
19 and 32 ._. _
6
and e below.
Input from receiver No. 4.
19 and 29 ____
7
b. Removing Control Set C-1611D/AIC.
Input from vhf navigation re-
19 and 12 ____
8
ceiver.
(1) Rotate the eight Dzus fasteners one-
Ground.
18 ___________
9
quarter turn counterclockwise.
28-volt power supply.
10
37 -----------
Input from low frequency navi-
19 and 11 ____
11
( 2 ) Pull the control set from its mounting in
gation receiver.
the aircraft as far as it will go.
Input from emergency receiver.
19 and 27 ____
12
(3) Rotate the two screw-type fasteners on
Marker beacon receiver.
19 and 13 ____
13
3-4
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