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Page Title:
Isolating Troubles in R-1467(P)/GRC-144(V) and R-1467(P)A/GRC-144(V) Dc Power Distribution Circuits |
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|  TM 11-5820-695-35
whether the fault is defective wiring or a defective circuit
not give a step number, perform all of the steps given in
that section starting with step a.
element.
c.
R-1467(P)/GRC-144(V) Primary Power Dis-
(2)
Observe that multimeter indication is
within the tolerance specified in the chart for each step.
tributuion Check Chart.
If it is not, refer to the R-1467(P)/GRC-144(V)
interconnecting diagram (fig. 5-21) and determine
Connect multimeter leads between
Multimeter indication
Section
Step
pin
and
pin
(ohms)
1
a
2A165AJ5-A
2A15A2S2-4
Less than 1
b
-B
2A16E2 (CAB GRD)
Less then 1
c
-C
2A15A2S22
Less than 1
2
a
2A15A2S21
2A15W2-B
Zero
b
-3
-A
Less than 1
3
a
2A15AS2-1
2A15W2XA14-4
Zero
b
-1
2A15W2XA14-10
Zero
c
-3
2A 1A2XDS1-3
2.2K 220
d
-3
2A15W2XA14-5
Zero
e
-3
2A15W2XA14-9
Zero
4
2A15A2S2-1
2A15A2S2-3
Less than 2
5
a
2A15W2XA1-12
2A15W2XA1-31
Less than 1
b
-14
-33
Less than 1
c
-16
-35
Less than 1
d
-18
-37
Less than 1
e
-19
2A15E2 (CAB GRD)
Zero
b.
Procedure.
3-14. Isolating Troubles in R-1467(P)/GRC-144(V)
and
R-1467(P)A/GRC-144(V)
DC
Power
(1)
Refer to the chart (c below). Connect
Distribution Circuits
the multimeter leads between the two pins of the listed
WARNING
steps of the sections that were referenced in the
troubleshooting chart (para 3-12b). If the trouble-
115 vac is present in R-1467/GRC-
shooting chart indicates a section but does not give a
144. Do not perform any of the
step number, perform all of the steps given in that
continuity or resistance checks given
section starting with step a.
in
this
paragraph
while
the
(2)
Observe that multimeter -indication is
equipment is connected to the
within the tolerance specified in the chart for each step If
primary power source.
it is not, refer to the R-1467(P)/GRC-144(V)
a.
Preparation of R-1467(P)/GRC-144(V)
interconnecting diagram (fig. 5-21) and determine
(1) Remove power supply 2A1 (para 3-40).
whether the fault. is defective wiring or a defective
circuit element.
(2) Remove components 2A4, 2A5, 2A7,
2A10, 2A11, 2A12, and 2A13 (TM 11-5820-695-12).
c.
R-1467(P)/GRC-144(V) DC Power Distri-
bution Check Chart.
(3) Disconnect plug 2A15W2P2 (fig. 3-19)
from jack on rear of tunnel diode amplifier 2A2 (fig. 5-
21).
Connect multimeter leads between
Multimeter indication
Section
Step
pin
and
pin
(ohms)
1
a
2A15W2XAA1-1
2A16XA10-1
Less than 1
b
-1
2A16WlXA13-1
Zero
c
-20
2A16XA10-2
Less than 1
d
-20
2A16W1XA132
Zero
2
a
2A15W2XA1-3
2A16XA7-3
Less than 1
b
-3
2A16XA5-3
Less than 1
c
-3
2A16XA4-3
Less than 1
d
-3
2A16W1XA11-3
Less than 1
e
-22
2A16XA7-4
Less than 1
f
-22
2A1&W1XA5-4
Less than 1
g
-22
2A16XA-4
Less than 1
h
-22
2A16W1XA11-4
Zero
Change 6 3-26
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