AR 1000W1000G, Руководство по эксплуатации и обслуживанию, Страница: 55 / 70

Model 1000W1000G
Rev A 35
4.3.1 General - Reading Faults
The Model 1000W1000G incorporates relatively simple fault detection circuitry, which makes use of the
digital display panel to alert the user or technician which component(s) need service. Use of these
indications can usually expedite troubleshooting of the amplifier. Most faults can be immediately
determined down to the assembly level. If a reset is still indicated, turn off the RF power signal to the
input of the amplifier, read and record the fault indication displayed on the digital control panel for later
reference. Then, use the RESET function to see if the fault clears. If the fault clears, slowly bring the
amplifier’s drive level back up and ensure that recommended RF power levels are not exceeded. If the
fault indication is no longer visible, the fault may have been brought about by a temporary transient
condition, component thermal condition or excessive RF drive to the amplifier’s input. If the fault does
not clear with the RF drive off, some other problem exists in the amplifier.
The digital control panel of the 1000W1000G indicates the output power from the 1000W1000G and the
power reflected back to it. If the reflected power is very high, with respect to the forward power, this
could indicate that the output coax cable is defective or that the load being driven has a high VSWR.
4.3.2 The Unit Cannot Be Operated Remotely
1. Verify that the front panel key-switch is set to the REMOTE position.
2. Verify that the unit operates locally by setting the key-switch to the LOCAL position; if the unit does
not operate locally, see 4.3.1 of this manual.
3. Check the position of the ADDRESS via the control software on the front panel touch screen as
shown in Figure 2-3 herein. (See Section 2 of this manual for the proper ADDRESS settings.)
4.3.3 Thermal Fault (Schematic 10046373)
During a Thermal Fault, the front panel display should read THERMAL FAULT.
1. Try to reset the unit; if the unit resets and operates normally, check to see that the cooling fans are
operating normally and that the air inlet on the bottom of the unit and the air outlets on the rear of the
unit are not blocked.
2. If the unit does not reset and the cooling fans are operating normally, check the voltage at the A26A3
Switch Breakout Assembly, J5, Pins 19-27.
3. If the voltage on A26A3 J5, Pins 19-27 is low, check the thermal sensor to the designated module.
4.3.4 Interlock Fault (Schematic 10046373)
The Model 1000W1000G 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 1000W1000G is shipped with a mating connector, which has a jumper between Pins 1
and 8 and 10 and 14, installed in the rear panel interlock connector. The unit will not operate
unless the interlock circuit is closed.