AR 10052412, Operating And Service Manual

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Model 5000A225C
46 Rev A
4.3.4 Interlock Fault
The Model 5000A225C is equipped with an interlock connector, which is located on the rear panel. The
interlock circuit can be used to sense the openings of doors to screen rooms, test chambers, and so forth, and to
turn off RF energy when these doors are opened.
NOTE: The Model 5000A225C is shipped with a mating connector, which has a jumper from Pins 1 to 8 and
10 to 14, installed in the rear panel interlock connector. The unit will not operate unless the interlock
circuit is closed.
4.3.4.1 Interlock Fault
1. In the event of an Interlock Fault, the front panel display should read INTERLOCK.
2. Check to see if it is safe to be power up the unit—are there personnel present in the screen room, or are
doors to the screen room open?
3. After checking for safety, try to clear the Interlock Fault from the front panel by using the RESET switch.
4. If the Interlock Fault will not clear, check for continuity in the External Interlock Circuit (Pin 1 to Pin 8 in
the connector).
5. Check the voltage on A52A3 J5, pin 32; it should be < 0.1V.
6. If the voltage on A52A3 J5, pin 32 is high, check the interlock line to ground.
4.3.4.2 AC Interlock Fault
1. In the event of an AC Interlock Fault, the front panel display should read AC INTERLOCK.
2. Check to see if it is safe to be power up the unit—are there personnel present in the screen room, or are
doors to the screen room open?
3. After checking for safety, try to clear the Interlock Fault from the front panel by using the RESET switch.
4. If the AC Interlock Fault will not clear, check for continuity in the External Interlock Circuit (Pin 10 to Pin
14 in the connector).
5. Check the voltage on A52A3 J5, pin 31; it should be < 0.1V.
6. If the voltage on A52A3 J5, pin 31 is high, check the interlock line to ground.