E8257D/67D, E8663D PSG Signal Generators Service Guide 399
Assembly Replacement
B1 Fan
B1 Fan
Tools Required
— T–10 driver
— 5/16” open–ended wrench
Removal Procedure
Refer to Figure 3-77 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 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 513, 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.
To Next Page
Loading...
Need help?
General
