AR 10046249, Operating And Service Manual, Page: 50 / 58

Model 150/150AW1000
30 Rev C
4.3.12 Hi Band Low or No Power Output (DC Tests) (Schematic
10046147)
All indicators on the Model 150/150AW1000 are normal, the front panel touch screen reads Power On , and
the cooling fans B1, B2 and B3 are 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 J1 Pin 13
-15 V
±
0.5 V
PS3 Out -24 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.
C1
+24.0 V ± 0.5 V
C2 –15.0 V ± 0.5 V
C3 +4.7 V
±
0.5 V
6. Check the voltages on the feed-thru caps of A2, A6 and A7.
C50
+24.0 V
±
0.3 V
C51 –15.0 V
±
0.3 V