Keysight E8257D/67D - Tools Required

E8257D/67D, E8663D PSG Signal Generators Service Guide
Assembly Replacement
B1 Fan
3-130
B1 Fan
Tools Required
• T–10 driver
• 5/16” open–ended wrench
Removal Procedure
Refer to Figure 3- 76 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 rear panel facing you.
4. For Option 1EM signal generators only, use the 5/16” open–ended wrench to disconnect the following RF cable
according to the signal generator you have.
Options 520 and 540: Disconnect W73 RF cable from the AT1 115 dB Attenuator and the RF Out.
Options 532 and 544: Disconnect W85 RF cable from the AT1 115 dB Attenuator and the RF Out.
Options 550 and 567: Disconnect W94 RF cable from the AT1 90 dB Attenuator and the RF Out.
5. Using the T–10 driver, remove the four screws (1) that attach the B1 Fan to the rear panel.
6. Disconnect the fan cable (2) from the A31 Motherboard P251.
7. Remove the B1 Fan.
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.