TM 11-6625-1633-45
Transformer or coil
Terminals
Resistance (ohms)
3-15. Isolating Trouble to a Diode
T2
1-2
7.25
3-4
7.8
When trouble has been localized to a diode circuit, use
5-6
150
the following chart to obtain the required voltage end
7-8
less than 1
resistance measurements.
9-10
less than 1
T3
1-2
3.5
Diode junction
Voltage (volts)
Resistance (ohms)
3-4
3.8
CR1 and CR4
80.0
0
5-6
37
CR3 and CR4
440.0
320K
7-8
48
CR2 and CR3
78.0
0
9-10
less than 1
CR1 and CR2
-295.0
0
11-12
less than 1
CR6 and CR9
-238.0
470K
12-13
less than 1
CR8 and CR9
117.0
480K
T4
1-3
greater than 30
CR7 and CR8
228.0
470K
4-5
25
CR6 and CR7
-600.0
460K
6-7
26
CR16 and CR19
278.0
900
L1
1-2
210
CR18 and CR19
570.0
2,700
3-4
275
CR17 and CR18
270.0
900
L2
1-2
220
CR16 and CR17
0.0
0
L3
1-2
17.5
CR20 and CR23
93.0
7,000
CR22 and CR23
283.0
8,000
b. The open circuit transfomer output voltages with 115
CR21 and CR22
93.0
7,000
vac line input voltage, are shown in the chart below:
CR20 and CR21
-98.0
6,000
Transformer
Terminals
Voltage (volts)
3-16. DC Resistance and Voltage Readings
T1
5-6
470.0
of Transformers and Coils
7-8
30.5
9-10
6.4
and coils in the AN/URM-149 are listed in the chart
T2
5-6
470.0
below:
7-8
15.5
9-10
6.4
Transformer or coil
Terminals
Resistance (ohms)
11-12
6.4
T1
1-2
8
T3
5-6
380.0
3-4
8.7
7-8
250.0
5-6
140
9-10
6.4
7-8
1.25
11-13
6.4
9-10
less than 1
3-19
