E8257D/67D, E8663D PSG Signal Generators Service Guide 339
Assembly Replacement
A27 40 GHz Doubler (Options 532 and 544 only)
A27 40 GHz Doubler (Options 532 and 544 only)
Tools Required
— T–10 driver
— 5/16” open–ended wrench
Removal Procedure
Refer to Figure 3-49 for this procedure.
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to “Outer Instrument
Cover” on page 258 and “Inner Instrument Cover” on page 260.
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:
— W100 from A27J2
— W104 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 W116 ribbon cable from A27J10.
7. Remove the A27 40 GHz Doubler from the RF deck.
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Torque all T–10 screws to 9 in–lbs.
3. Torque all RF connectors to 8 in–lbs.
4. Perform the post–repair adjustments and performance tests that pertain
to this removal procedure.
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