TM 11-6625-622-40
i. Test Harness, Radio Set AN/URM-157A
(2) Remove the control unit from the test
Wiring Continuity Checks. Prepare for wiring
u n i t and disconnect cable W5 from the control
continuity checks as follows:
u n i t . Make the resistance measurements at the
free end of cable W5,
(1) Remove all power from the test unit,
( 3 ) Set the test unit switches to the posi-
( 2 ) Remove the control unit from the test
tions given in the following chart.
u n i t and disconnect cable W5 from the control
Switch
Position
u n i t , Make the resistance measurements at the
714E-1--714E-2/3 . . . . . . . . . . . . . . . . . . . . 714E-2/3
free end of cable W5,
OUT
300 AUDI0 LOAD switch S5 . . . . . . . . . . .
( 3 ) Set the test unit switches to the posi-
KEYswitch S9 . . . . . . . . . . . . . . . . . . . . . . .
Center
NORMAL
K E Y INTLK switch S7 ------------------
tions given in the following chart.
Normal
TUNE POWER switch S4 . . .. . . . . . . . . . . .
Switch
Position
7 1 4 E - 1 -- 7 1 4 E - 2 / 3 -- 7 1 4 E - 6 ------------
714E-2/3
(4) Make the continuity checks as indicated
AUDIO LOAD switch S5----- ------------
OUT
in the following chart:
KEY switch So -------------- -----
To
Center
Check
From
KEY INTLK switch S7 ---- --------------
NORMAL
W5-pin A
1
J1-pin 32
TUNE POWER switch S4-----
Normal
2
B
33
34
3
c
(4) Make the continuity checks as indicated
D
36
4
in the following chart:
E
6
36
Cheek
From
To
F
6
38
W6-pin A
J1-pin 32
1
7
39
G
2
B
33
8
40
H
3
c
W5-pin J
34
9
J1-pin 41
4
D
K
36
10
46
6
E
11
L
36
46
6
F
M
12
38
47
7
N
13
39
G
48
H
40
8
14
P
49
W5-pin J
15
R
9
J1-pin 41
50
K
16
S
10
45
51
L
11
46
17
T
52
M
18
12
47
V
25
19
N
i
13
48
24
P
20
49
14
55
q
16
R
21
50
31
P
22
16
u
s
51
59
23
z
T
17
52
30
25
24
v
18
a
58
25
i
b
19
24
57
J6-pin B
26
55
20
W5-pin f
q
27
J6-pin C
31
21
W5-pin g
P
28
J6-pin D
u
22
59
W5-pin h
29
J6-pin F
z
30
23
W5-pin Y
a
30
J6-pin Z
24
58
W5-pin W
31
J6-pin A
b
25
57
J1-pin 7
32
J6-pin K
J6-pin B
26
W5pin f
J1-pin 26
33
J6-pin N
J6-pin C
27
W5-pin g
J1-pin 55
34
J6-pin P
P6-pin D
28
W5-pin h
J1-pin 55
36
J6-pin R
J6-pin F
W5-pin Y
29
W5-pin q
36
J6-pin S
J6-pin Z
W5-pin W
30
J1-pin 11
37
J6-pin T
J6-pin A
J1-pin 7
J1-pin 11
31
38
J6-pin U
J6-pin K
J1-pin 11
J1-pin 26
32
39
J6-pin V
J6-pin N
J1-pin 55
33
J1-pin 11
40
J6-pin X
J6-pin P
J1-pin 55
J1-pin 5
34
41
J&pin i
J6-pin R
W5-pin q
J1-pin 9
36
42
J6-pin k
J6-pin S
J1-pin 10
J1-pin 11
36
43
J6-pin r
J6-pin T
J1-pin 11
J1-pin 66
37
44
J6-pin s
J1-pin 56
J6-pin U
J1-pin 11
38
46
J6-pin t
J6-pin V
J1-pin 11
J1-pin 66
39
46
J1-pin 18
J6-pin X
J1-pin 5
Ground pin P1
40
47
J1-pin 27
J1-pin 9
41
Ground pin P1
J6-pin i
48
J1-pin 60
J1-pin 10
J2-pin 60
42
J6-pin k
3-5
