2. Service
Assembly/Module Diagnostic Trees (Diagnostic Section 3)
110
3.6.5.0 A15J1 Power-Level Check
1 Connect A15J1 to a +2.5 Vdc power supply.
2 Check spectrum analyzer again and verify that amplitude has increased to at
least 0 dBm.
3 Disconnect power supply from A15J1 and reconnect internal cable to A15J1.
QUESTION: Did the amplitude on the spectrum analyzer increase
to at least 0 dBm?
If Yes: Go to, 3.6.6.0.
If No: Remove power, replace A15, and retest.
3.6.6.0 A15J2 Frequency-Range Test
1 Disconnect cable from A15J2.
2 Connect a 0 to +10 volt power supply to A15J2.
3 Vary voltage from 0 to +10V while watching signal on spectrum analyzer
connected to A15J5.
4 Verify that a frequency of 9192.6 MHz can be obtained with a voltage
between +2 and +8 Vdc.
QUESTION: Can frequency of 9192.6 MHz be obtained with a voltage
between +2 and +8 Vdc?
If Yes: Go to, A18 diagnostic tree in this section.
If No: Remove power, replace A15, and retest.
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