2-76
Assembly Replacement
A28 YIG Oscillator
A28 YIG Oscillator
Tools Required
• T-10 driver
• 5/16” open ended wrench
Removal Procedure
Refer to Figure 2-38 for this procedure.
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5
and "Inner Instrument Cover" on page 2-7.
3. Position the signal generator with the A31 Motherboard facing you and the RF deck on top.
4. Using the 5/16’ open ended wrench, disconnect the W38 RF cable from the A28 YIG Oscillator.
5. Disconnect the W12 ribbon cable from the A28 YIG Oscillator’s driver board.
6. Using the T-10 driver, remove the two screws (1) that attach the A28 YIG Oscillator to the side
panel.
7. Using the 5/16” open ended wrench, disconnect the W27 RF cable from the A30 Modulation
Filter with High Power.
8. Remove the A28 YIG Oscillator.
Replacement Procedure
• Reverse the order of the removal procedure.
• Torque all T-10 screws to 9 in-lbs.
• Torque all RF connectors to 8 in-lbs.
• Perform the post-repair adjustments and performance tests that pertain to this removal
procedure.
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