AR 10046836, Operating And Service Manual

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Model 500W1000C
34 Rev A
4.3.4 Interlock Fault (Schematic Diagram No. 10045618)
The Model 500W1000C 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 500W1000C is shipped with a mating connector, which has a jumper between Pins 1 and 8,
installed in the rear panel interlock connector. The unit will not operate unless the interlock circuit is
closed.
1. In the event of an Interlock Fault, the front panel display should read INTERLOCK FAULT .
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, which mate with P1 in the rear panel).
5. Check the voltage on A18A3 J5, pin 30; it should be < 0.1V.
6. If the voltage on A18A3 J5, pin 30 is high, check the interlock line to ground.
4.3.5 Power Supply Faults (Schematic Diagram No. 10045618)
4.3.5.1 PS1 Fault (DC Fault)
The PS1 power supply has a DC Fault output which is normally high (≤4.0V) to the A1 8A3 J5, pin 29. If any
of the PS1 outputs fail, this output will go low (≤0.1V) and inhibit the A 1 Pre-Amplifier Module.
4.3.5.2 PS2 Fault (POWER FAIL)
The PS2 power supply has POWER FAIL output which is normally low ( ≤ 0.1V) to the A18A3 J5, pin 28. If
the PS2 output fails, this output will go high (> 4.0V) and inhibit the A1 Pre-Amplifier Module.
4.3.5.3 PS3 Fault (POWER FAIL)
The PS2 power supply has POWER FAIL output which is normally low (≤0.1V) to the A 18A3 J5, pin 28. If
the PS2 output fails, this output will go high (> 4.0V) and inhibit the A1 Pre-Amplifier Module.