AR 10046249, Operating And Service Manual, Page: 48 / 58

Model 150/150AW1000
28 Rev C
4.3.5 Interlock Fault (Schematic 10046147)
The Model 150/150AW1000 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 150/150AW1000 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 touch screen 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 A12A3 J5, pin 30; it should be < 0.1V.
6. If the voltage on A12A3 J5, pin 30 is high, check the interlock line to ground.
4.3.6 PS1 Fault (Schematic 10046147)
The PS1 power supply has DC Fault output which is normally low (< 0.1V) to the A12A3 J5, pin 29. If any of
the PS1 outputs fail, this output will go high (> 4.0V) and will report a fault.
4.3.7 PS2 Fault (Schematic 10046147)
The PS2 power supply has DC Fault output which is normally low (< 0.1V) to the A12A3 J5, pin 28. If any of
the PS2 outputs fail, this output will go high (> 4.0V) and inhibit the A1 Pre-Amplifier.
PS2 also has a Thermal Fault output which is normally low (< 0.1V) to the A12A3 J5, pin 22. If the temperature
of PS2 rises above 70°C, a Thermal Fault will be reported
4.3.8 PS3 Fault (Schematic 10046147)
The PS3 power supply has DC Fault output which is normally low (< 0.1V) to the A12A3 J5, pin 27. If any of
the PS3 outputs fail, this output will go high (> 4.0V) and inhibit the A2 Driver Amplifier.
PS3 also has a Thermal Fault output which is normally low (< 0.1V) to the A12A3 J5, pin 21. If the temperature
of PS3 rises above 70°C, a Thermal Fault will be reported