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Page Title:
Figure 2-49. Vehicle alarms not heard on intercom Flowchart |
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|  TM-11-5830-263-20&P
START
1. DISCONNECT ALARM CABLE
FRO M ALARM GENERATION
EQUIPMENT.
2. TRIGGER VEHICLE ALARM.
3. AT ALARM GENERATOR
CONNECTOR CHECK FOR
PRESENCE OF AN
ALTERNATING VOLTAGE AT
ALARM OUTPUT (REFER TO
SPECIFIC VEHICLE W IRING
DIAG RAM TO DETERMINE
W HICH PINS ON CONNECTOR
CORRESPOND TO ALARM
O UTPUT AND ALARM GROUND).
IS
NO
VOLTAGE
DEFECTIVE ALARM GENERATION
PRESENT?
EQ UIPMENT. NOTIFY SUPERVISOR.
YES
1. RECONNECT ALARM CABLE TO
END
ALARM GENERATION
EQUIPMENT.
2. DISCONNECT ALARM CABLE
FRO M MCS.
3. TRIGGER VEHICLE ALARM.
4. AT FREE END OF ALARM CABLE
CHECK FOR PRESENCE OF
ALTERNATING VOLTAGE
BETW EEN:
(i) PIN A (ALARM1) AND PIN E
(ALARM GND),
(ii) PIN B (ALARM2) AND PIN E,
(iii) PIN C (ALARM3) AND PIN E.
IS
NO
VOLTAGE DETECTED
REPLACE DEFECTIVE ALARM
AT ANY OF THE
CABLE.
PINS A, B, OR C?
YES
END
REPLACE DEFECTIVE MCS.
END
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