7-40 Service Guide E8364-90038
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A20 LODA E8362C, E8363C, E8364C
Removing and Replacing the A20 LODA
Tools Required
• T-10 TORX driver (set to 9 in-lb)
• T-20 TORX driver (set to 21 in-lb)
• 5/16-inch open-end torque wrench (set to 10 in-lb)
• ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-14 for this procedure.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to “Removing the Covers” on page 7-6. Position the analyzer bottom side
up and raise the receiver deck as shown. Refer to “Raising and Removing the Receiver Deck” on page
7-8 if necessary.
3. With a 5/16-inch torque wrench, disconnect the six semirigid cables (item
①) from the A20 LODA.
4. Disconnect the ribbon cable (item
➁) at the A20 LODA.
5. With a T-10 TORX driver, remove the six mounting screws (item
③).
CAUTION Be careful not to damage the center pins of the semirigid cables. Some flexing of the cables
is necessary to remove the assembly. Do not over-bend the semirigid cables.
6. Remove the A20 LODA from the analyzer. Observe the
CAUTION above.
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal
procedure. Refer to Table 7-2 on page 7-82.
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