AR 1000S1G6C, Руководство по эксплуатации и обслуживанию

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Model 1000S1G6C
Rev A 57
4. Verify the correct voltages to the modules. Troubleshoot any incorrect voltages.
5. A2: C2 = +24 ± 0.2V C1 = -5 ± 0.3V C3=logic high (no fault)
A3: FL1, FL2 = +24 ± 0.2V FL4 = -8V
±
0.3 V FL3=logic high (no fault)
4.3.7 ALC Fault
1. Indication – ALC
2. As stated previously, the power limit controls could not limit either the forward or reverse power to the
preset threshold. This can be a transient type of problem, if the fault can be cleared. If the fault cannot be
cleared with no RF input drive power, then there is a malfunction in the ALC board or associated circuit.
4.3.8 Low or No Power Output (DC Tests) (Diagram
10050943,10051749)
All indicators are normal, the front panel display reads Power On , and the cooling fans 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 J18 Pin 1,2
+5 V
±
0.5 V
PS1 J18 Pin 5 -15 V ± 0.5 V
PS2 V+
PS3 V+ +26V ± 0.5 V
PS4 V+ +24V
±
0.5 V
PS5 V+ +24V
±
0.5 V
PS6 V+ +24V
±
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
+5 V ± 0.5 V (Gain Control @ 100%)
C3 -5 V ± 0.5 V
C2 -12 V ±0.5 V
C4 +15 V
±
0.5 V
6. Check the voltages on the feed-thru caps of A2 Driver module.
C1
-5 V
±
0.3 V
C2 +24 V
±
0.3 V
7. Check the voltages on the feed-thru caps of A3, A5-A8 Driver modules and A13-A28 Final modules.
A3-FL1
+24V ± 0.3 V
A3-FL2 +24V ± 0.3 V
A3-FL4 -8V
±
0.3 V