7-22 Service Guide E8361-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A12 Source 20 E8361A
Removing and Replacing the A12 Source 20
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 7-9 for this procedure.
1. Disconnect the power cord.
2. Remove the outer and inner covers. Refer to “Removing the Covers” on page 7-6.
3. Remove the A13 (Option 080) frequency offset receiver assembly, if present. Refer to
“Removing and Replacing the A13 Frequency Offset Receiver Assembly” on page 7-24.
4. With a 5/16-inch torque wrench, disconnect the semirigid cable (item
①) from the
bottom of the A12 source 20.
CAUTION To avoid damage to the semirigid cable (item ①), pull down on the cable from
the bottom of the analyzer to move it away while sliding out the
A12 source 20. The cable has some spring to it and the RF pin could be
damaged by the A12 source 20.
5. Disengage the A12 source 20 from the A11 connector and slide out of 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 7-66.
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