2-56
Assembly Replacement
AT1 115 dB Attenuator
AT1 115 dB Attenuator
Tools Required
• T-10 driver
• 5/16” open ended wrench
Removal Procedure
Refer to Figure 2-25 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 so that the RF deck is on top.
4. Disconnect the AT1W1 ribbon cable from A26J13.
5. Using the 5/16” open ended wrench, disconnect the W24 and W25 RF cables from the
AT1 115 dB Attenuator.
6. Using the T-10 driver, remove the two screws (1) that attach the AT1 115 dB Attenuator to the
side panel.
7. Remove the attenuator from the A26 MID bracket.
8. Using the T-10 driver, remove the sheet metal from the attenuator.
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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