AR 10051217, Руководство по эксплуатации и обслуживанию

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Model 2000S1G2z8
Rev A 57
4.3.1 General - Reading Faults
The Model 2000S1G2z8 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 2000S1G2z8 indicates the output power from the 2000S1G2z8 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.
3. Check the position of the ADDRESS via the control software on the front panel touch screen. (See Section
2 of this manual for the proper ADDRESS settings.)
4.3.3 Thermal Fault (Diagram No 10051819,10051526)
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 (B1-B68)
are operating normally and that the air inlets on the bottom and side covers 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 Switch
Breakout Assemblies A64A2 through A68.
A64A2 - J5, Pins 10,12,14,16
A65 – J5, Pins 21,22, 24-31
A66 - J5, Pins 21,22, 24-31
A67 - J5, Pins 21,22, 24-31
A68 - J5, Pins 21,22, 24-31
3. If the voltage on J5 of the Switch Breakout Assemblies, Pins 10,12,14,16,21,22 and 24-31 are low, check
the thermal sensor to the designated module.