E8257D/67D, E8663D PSG Signal Generators Service Guide
 
Assembly Replacement
A38 Lowband Switch Filter 
3-108
A38 Lowband Switch Filter 
Tools Required 
• none 
Removal Procedure 
Refer to Figure 3- 70 for this procedure.
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to “Outer Instrument Cover” on page 3- 4 and “Inner 
Instrument Cover” on page 3- 6.
3. Position the signal generator with the front panel facing you.
4. Lift the retention levers and disconnect the board assembly from the A31 Motherboard.
5. Lift the board assembly 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.