2-98
Assembly Replacement
B1 Fan
B1 Fan
Tools Required
• T-10 driver
• 5/16” open ended wrench
Removal Procedure
Refer to Figure 2-47 for this procedure.
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5
and "Inner Instrument Cover" on page 2-7.
3. Position the signal generator with the rear panel facing you.
4. Using the 5/16” open ended wrench, disconnect the W73 RF cable from the AT1 115 dB
Attenuator and the RF Out (Option 1EM signal generators only).
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.
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