7-54 Service Guide E8364-90038
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A31, A32, A33, and A34 Receiver Modules and A49 IF Multiplexer Board E8362C, E8363C,
E8364C
Removing and Replacing the A31, A32, A33, and A34 Receiver Modules and
A49 IF Multiplexer Board
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 7-24 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 the Receiver Deck” on page 7-8 if necessary.
3. Identify the receiver module to be removed. To replace one of the receiver modules, the A49 IF
multiplexer board must be removed from the receiver motherboard.
4. Disconnect the flexible cables from the A49 IF multiplexer board and the receiver modules.
5. Disconnect the ribbon cable from the A49 IF multiplexer board.
6. With a T-10 TORX driver, remove the eight mounting screws (item
①
) from the A49 IF multiplexer board.
Remove the board from the receiver motherboard.
7. With a T-10 TORX driver, remove the three mounting screws (item
➁) from the appropriate receiver
module.
8. Remove the receiver module from the analyzer.
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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