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Section II. TROUBLESHOOTING SIMULATOR-TEST SET, RADIO SM-348/ARC-51X
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TM-11-6625-564-45 Maintenance Kits Electronic Equipment MK-731/ARC-51X Manual
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Localizing Troubles - TM-11-6625-564-450031
C2, TM 11-6625-564-45
Resistance
Figure
Terminals
Position
Switch
(ohms)
500
1 of relay K1 to 7 of relay K1--------------------
RESET ON
2-1
POWER
700
Across indicator lamps DS2 thru DS6
2-1
125
Across indicator lamp DS1------------------
2-1
A of J2 to 5 of relay K2 -------------------------
Infinity
2-1
OFF
POWER
Infinity
A of J2 to point No. 1 of readout
2-1 and 2-3
mechanism.
0
E1 of 1A4 to c of J2  --------------------
2-6
POWER
OFF
E1 of 1A4 to ground -------------------------
37,000
2-6
TEST SELECT OFF
28,700
E1 of 1A4 to 2, 6, or 7 of switch S1B.
2-1
and 2-6
E2 of 1A4 to E6 of 1A3 -------------------------
0
2-6
E2 of 1A4 to ground ------------------------------
9,200
2-6
E2 of 1A4 to L of J2 ----------------------------
108,200
2-6
and 2-1
E4 of 1A4 to E1 of 1A6 -------------------------
0
2-4
and 2-6
0
E5 of 1A4 to E3 of 1A2 -------------------------
2-6
and 29
0
E5 of 1A4 to E3 of 1A1------------------------
2-6
and 2-7
0
E2, 6 of 1A6 to 9 of relay K1------------------
2-4 and 2-1
POWER
OFF
0 to 7,600
E2, 6 of 1A6 to E3 of 1A6. (Rotate
2-4
TEST SELECT
OFF
VSWR CAL control, and note var-
iation in resistance.)
E6 of 1A6 to ground --------------------------
0
2-4
0
J1 to P2 (directional coupler) ______
2-1
0
J3 to P3 --------------------------
2-1
9 of switch S1B to DC1 reflected
0
OFF
2-1
POWER
output.
8 of switch S1B to DC1 forward
0
2-1
OFF
TEST SELECT
OUTPUT.
12,100
7 of switch S1B to 10 of switch S1C.
2-1
0
6 of switch S1B to Z of J2 -----------------
2-1
6 of switch S1B to ground -------------------
2-1
15,000
5 of switch S1B to E4 of 1A3 -----------------
2-1 and 2-11
90,000
4 of switch S1B to ground __________
2-1
11,000
4 of switch S1B to H of J2 --------------------
2-1
383,000
4 of switch S1B to E1 of 1A3------------------
2-1 and 2-11
383,000
3 of switch S1B to ground -------------------
2-1
8,250
2 of switch S1B to ground ---------------------
2-1
8,250
1 of switch S1B to ground ----------
0
10 of switch S1B to 1 of switch S1A.
2-1
0
2-1
1 of switch S1A to 5, 8, and 9 of
0
switch S1A.
2-1
2 o f switch S1A to 3, 4. 6, and 7 of
0
of switch S1A.
2 of switch S1A to 1 of switch S1A.
2-1
237,000
2 of switch S1A to 10 of switch S1B.
2-1
237,000
10 of switch S1A to positive of M1 --
2-1
0
3 of switch S1C to D of J2 -------------------
2-1
0
7 of switch S1C to around -----------------
2-1
0
2-1 and 2-11
6 of switch S1C to E2 or E5(A mod e l ) o f 1 A 3
2-1
8 of switch S1C to 8 of relay K1 ----
0
OFF
2-1
POWER
Positive of M1 to negative of Ml
5,000
(with diode CR1 disconnected).
TEST SELEC'I
OFF
E1 of 1A3 to H of J2------------------------
OFF
2-11 and 2-1
0
POWER
VSWR CAL
2-11 and 2-1
E2 of 1A3 to 8 of relay K1-----------------------
TEST
Infinity
E3 to 1A3 to ground ______________
2-11
0
2-11 and 2-1
E4 to 1A3 to L of J2. (Vary R17 to
0 to 50,000
note continuity of potentiometer and
variance in resistance.)
21

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