Status Signals from LRU-1

TM 11-6625-2884-30/NAVAIR 16-35TS3615-2

CONTROL AND POWER DISTRIBUTION (Continued)

e. Status Signals from LRU-1 (refer to Figure FO-13).

(1)

STBY/OPR POWER (DQTDOPR): The STBY/OPR Power (+28 V dc) is received

from the low voltage power bus in LRU-1 when the control indicator

is switched to standby or operate. The +28 Vdc enables the 180

second time delay relay and supplies +23 V to the ON, STBY and OPR

indicators in Control Indicator 1A1A1.

LRU-1 DISCONNECT MONITOR (GOP28ST): The LRU-1 disconnect

(2)

monitor (ground) is received from LRU-1 and energizes the LRU-1

disconnect monitor relay in Control Indicator 1A1A1.

TWTA FAULT (OVPT FLT): When a fault occurs in the high voltage

(3)

power supply or traveling wave tube amplifier or if an overtempera-

ture condition occurs in LRU-1, a TWTA fault signal is generated.

This causes the fault relay in the control indicator to

de-energize, generating an INOP (5) ground level signal,

illuminating the INOP (6) lamp on the control panel.

JAM INDICATE (1YJAM): When LRU-1 is transmitting active ECM, the

(4)

JAM INDICATE signal (high level) is received from the high voltage

power supply in LRU-1. This causes the jam relay to energize in

the control indicator producing a JAM (7) signal (ground level)

which illuminates the JAM (8) lamp on the control panel.

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