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TM 9-2320-364-20-4
2-3126
3.
Replace circuit
breaker CB28
(Para 21-15). Verify
repair, go to Step 7 of
this Fault.
YES
NO
24 vdc present at polarity
protection terminal B.
Wire 1784 from 24 vdc polarity
protection to MC136 is OK.
Wire 1784 from MC136 to
CB28 OK.
Circuit breaker CB28 faulty.
Wire 1784 from CB28 to
MC136 faulty.
Wire 1784 from MC136 to
MC129 faulty.
Wire 1784 from MC136 to
MC130 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If 22 to 28 vdc are not present,
circuit breaker CB28 is faulty.
Are 22 to 28 vdc measured on
wire 1784 at circuit breaker
CB28?
4. LOSS OF INTERFACE POWER 24 VDC (CONT).
WARNING
Read WARNING
on Page 2-3127
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