7-52 Service Guide E8361-90001
Repair and Replacement Procedures PNA Series Microwave Network Analyzers
Removing and Replacing the A35 Receiver Motherboard E8361A
Removing and Replacing the A35 Receiver Motherboard
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 7-13 for this procedure.
1. Disconnect the power cord.
2. Remove the outer covers. 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. Remove the LO reject filter board and all four receiver modules. Refer to “Removing and
Replacing the A31, A32, A33, and A34 Receiver Modules and LO Reject Filter Board” on
page 7-50.
4. Disconnect the flexible cables (item
①) from the receiver motherboard.
5. Disconnect the flexible cable (item
②) from the receiver motherboard if present
(Option 080 only).
6. Disconnect the ribbon cable (item
③) from the receiver motherboard.
7. Remove the receiver deck from the analyzer with the receiver motherboard attached.
Refer to “Removing the Receiver Deck” on page 7-8, if necessary. The receiver
motherboard and receiver deck are replaced as one unit.
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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