AR 1000W1000G, Operating And Service Manual, Page: 56 / 70

Model 1000W1000G
36 Rev A
4.3.4.1 Interlock Fault
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 P32 in the rear panel).
5. Check the voltage on A26A3 J5, pin 32; it should be < 0.1V.
6. If the voltage on A26A3 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 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 AC Interlock Fault will not clear, check for continuity in the External Interlock Circuit (Pin 10
to Pin 14 in the connector, which mate with P32 in the rear panel).
5. Check the voltage on A26A3 J5, pin 31; it should be < 0.1V.
6. If the voltage on A26A3 J5, pin 31 is high, check the interlock line to ground.
4.3.5 Power Supply Faults (Schematic 10046885)
4.3.5.1 PS3 Fault (POWER FAIL)
The PS3 power supply has POWER FAIL output which is normally low (≤0.1V) to the A 26A3 J5, pin 29.
If the PS3 output fails, this output will go high (> 4.0V) and inhibit the A1 Pre-Amplifier Module.
4.3.5.2 PS4 Fault (POWER FAIL)
The PS4 power supply has POWER FAIL output which is normally low (≤0.1V) to the A 26A3 J5, pin 30.
If the PS4 output fails, this output will go high (> 4.0V) and inhibit the A1 Pre-Amplifier Module.