2-52
Assembly Replacement
A21 Rear-Panel Interface
A21 Rear-Panel Interface
Tools Required
• T-10 driver
• 9/16” hex-nut driver
• 5.0 mm hex-nut driver
• 7.0 mm hex-nut driver
• needle-nose pliers
Removal Procedure
Refer to Figure 2-23 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. Remove the rear panel. Refer to "Rear Panel (Standard)" on page 2-44 or
"Rear Panel (Option 1EM)" on page 2-47.
4. Using the 9/16” hex-nut driver, remove the nuts and washers securing the six BNC
connectors (1) at the base of the rear panel.
5. Using the 5.0 mm hex-nut driver, remove the screws (2) from the RS-232 port.
6. Using the 7.0 mm hex-nut driver, remove the screws (3) from the GPIB port.
7. Using the T-10 driver, remove the two screws (4) from the bottom of the A21 Rear-Panel
Interface.
8. Disconnect the B1 Fan cable (5) from A31P251.
9. If you have Option UNR, disconnect the A32 10 MHz Crystal Oscillator (Option UNR) cable from
A21P2.
10.Remove the A21 Rear-Panel Interface.
Replacement Procedure
• Reverse the order of the removal procedure.
• Torque all T-10 screws to 9 in-lbs.
• Torque all hex-nuts to 9 in-lbs.
• Torque all BNC nuts to 21 in-lbs.
• Perform the post-repair adjustments and performance tests that pertain to this removal
procedure.
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