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Page Title:
Isolating Troubles in Electrical Equipment Chassis 3A7. |
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|  TM 11-5820-695-35
c.
CV-3633/GRC-144(V) DC Power Distribution Checks.
Connect multimeter leads between
Multimeter indication
Section
Step
pin
and
pin
(ohms)
1
a.
3A7XA6B-1
3AXA5-5
Zero
b.
3A7XA1-27
Zero
c.
3A7XA2-3
Zero
d.
3AP4-1
Zero
e.
3A7TB4-3
Zero
f.
3A7TB4-4
Zero
2
a.
3A7XA6B-2
3A7XA5-6
Zero
b.
3A7XA1-8
Zero
c.
3A7XA2-4
Zero
d.
3A7P4-2
Zero
e.
3A7TB4-1
Zero
3
a.
3A7XA6B-5
3A7XA5-3
Zero
b.
3A7XA6B-6
3A7XA5-4
Zero
3-18.4. Isolating Troubles in Electrical Equipment
(4)
Remove the CV-3633/GRC-144(V)
Chassis 3A7.
connector plugs P1 and P3 from Receiver, Radio R-
1467(P)A/GRC-144(V) connectors J5 AC POWER
WARNING
INPUT and J2 EQUIPMENT INTERCONNECT
respectively.
115 vac is present in CV-3633/GRC-
(5)
Remove the CV-3633/GRC-144(V)
144(V). Do not perform any of the
alarm monitor 3A1, electronic frequency converter 3A2,
continuity or resistance checks given
amplifier multiplier 3A5 and power supply 3A6.
in
this
paragraph
while
the
equipment is connected to the
b.
Procedure.
primary power source.
(1)
Refer to the chart (c below). Connect
a.
Preparation of CV-3633/GRC-144(V).
the multimeter leads between the two pins referenced
(1)
Remove
connector
plug
from
Converter-Multiplier CV-3633/GRC-144(V) J1 AC PWR
(2)
Observe that multimeter indication is
connector.
within the tolerance specified in the chart for each step.
If it is not, refer to the CV-3633/GRC-144(V)
(2)
Remove connector plugs from the
interconnecting diagram (fig. 5-98) and determine
CV-3633/GRC-144(V) Equip INTCON connectors J2
whether the fault is defective wiring or a defective circuit
and J3.
element.
(3)
Remove status panel 3A8.
Change 6 3-30.6
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