E8257D/67D, E8663D PSG Signal Generators Service Guide 387
Assembly Replacement
A43 Lowband Amp Filter
A43 Lowband Amp Filter
Tools Required
—none
Removal Procedure
Refer to Figure 3-71 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 front panel facing you.
4. Using the 5/16” open-ended wrench, disconnect W140 from the A38 Low
Band Switch Filter board.
5. Using the needle-nose pliers, disconnect W139 from the A43 Lowband
Amp Filter board.
6. Lift the retention levers and disconnect the A43 Lowband Amp Filter board
from the A31 Motherboard.
7. Lift the A43 Lowband Amp Filter board out of the slot.
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post–repair adjustments and performance tests that pertain
to this removal procedure.
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