7-42 Service Guide E8364-90038
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A21 SOMA 50 (E8363C and E8364C Only) E8362C, E8363C, E8364C
Removing and Replacing the A21 SOMA 50 (E8363C and E8364C Only)
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 two semirigid cables (item
①) from the A21 SOMA 50.
4. Disconnect the flexible cable (item
➁) from the A21 SOMA 50.
5. Disconnect the ribbon cable (item
③) at the A21 SOMA 50.
6. With a T-10 TORX driver, remove the four mounting screws (item
④).
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.
7. Remove the A21 SOMA 50 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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