2-74
Assembly Replacement
A27 40 GHz Doubler (Option 540 Models Only)
A27 40 GHz Doubler (Option 540 Models Only)
Tools Required
• T-10 driver
• 5/16” open ended wrench
Removal Procedure
Refer to Figure 2-37 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 away from you and the RF deck
on top.
4. Using the 5/16” open ended wrench, disconnect the following RF cables:
• Standard - W30 from A27 40 GHz Doubler or
Option 1EM - W83 from A27 40 GHz Doubler
• W31 from A27J3
• W32 from A27J1
5. Using the T-10 driver, remove the two screws that attach the A27 40 GHz Doubler to the side
panel.
6. Disconnect the W29 ribbon cable from the A27 40 GHz Doubler’s board.
7. Remove the A27 40 GHz Doubler from the RF deck.
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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