E8257D/67D, E8663D PSG Signal Generators Service Guide 375
Assembly Replacement
A37 Upconverter (E8267D Only)
A37 Upconverter (E8267D Only)
Tools Required
— T–10 driver
— 5/16” open–ended wrench
— needle–nose pliers
Removal Procedure
Refer to Figure 3-64 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 you and the
RF deck on top.
4. Using the 5/16” open–ended wrench, disconnect the following RF cable:
— W98 from A37J2
— W103 from A27J3
— W102 from A37J4
— W78 from A37J1
5. Using the needle–nose pliers, disconnect the following flexible cables:
— W114 from A37J9
— W97 from A37J8
6. Using the T–10 driver, remove the three screws that attach the A37
Upconverter to the RF deck.
7. Disconnect the W99 ribbon cable from the A37J7.
8. Remove the A37 Upconverter 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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