AR 10U1000, Руководство по эксплуатации и обслуживанию

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Model 10U1000
Rev B 25
4.3.5 Amplifier Faults (Schematic Diagram Nos. 10043972 and
10041561)
1. The fault output the A2 module is sensed on A4, J13, pin 10.
2. Verify the correct voltages to the modules. Troubleshoot any incorrect voltages.
FL50 = +28 ± 0.2V
FL51 = –15 ± 0.2V
4.3.6 Low or No Power Output (DC Tests) (Schematic Diagram No.
10043972)
All indicators are normal, the front panel display reads Power On , and the cooling fan (B1) is operating.
1. Check the position of the RF Gain control—is it set to maximum gain?
2. Check the RF input to the unit—is it the correct amplitude and frequency?
3. Check the RF output connection from the unit—is it correctly connected to the load?
Is the coaxial cable okay?
4. Check the following voltages on the Power Supply. If any of the voltages are out of tolerance, correct
them before further troubleshooting.
PS1 J18 Pin 5
+15 V ± 0.5 V
PS1 J18 Pin 8 -15 V
±
0.5 V
5. Check the voltage on the feed thru caps of the A1 Pre-Amp, with the RF gain control at maximum gain.
Troubleshoot any incorrect voltages.
FL2
+24 V ± 0.5 V
FL3 -15 V
±
0.5 V
FL4 +4.7 V ± 0.5 V
6. Check the voltages on the feed-thru caps of A2.
FL50 +28.0 V
± 0.3 V
FL51 –15.0 V
±
0.3 V