7-50 Service Guide E8361-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A31, A32, A33, and A34 Receiver Modules and LO Reject Filter Board E8361A
Removing and Replacing the A31, A32, A33, and A34
Receiver Modules and LO Reject Filter 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 7-23 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
LO reject filter board (item
①) must be removed from the receiver motherboard.
4. Disconnect the flexible cables (item
②) from the LO reject filter board and the receiver
modules.
5. Disconnect the ribbon cable (item
③) from the LO reject filter board.
6. With a T-10 TORX driver, remove the eight mounting screws (item
④) from the LO
reject filter board. Remove the board from the receiver motherboard.
7. With a T-10 TORX driver, remove the three mounting screws (item
⑤) 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 7-66.
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