Removing And Replacing The A38 And A39 Bias Tees (Option Unl) - Agilent Technologies E8362C Service Manual

Repair and Replacement Procedures

Removing and Replacing the A38 and A39 Bias Tees (Option UNL)

Removing and Replacing the A38 and A39 Bias Tees (Option UNL)
Tools Required
• T-8 TORX driver (set to 5 in-lb)
• 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 7-26 for this procedure.
1. Disconnect the power cord.
2. Remove the outer cover. Refer to
up and raise the receiver deck as shown. Refer to
3. Identify the bias tee to be removed. To replace the bias tee, the bracket holding the attenuator, detector
(E8363C/E8364C) or fixed pad (E8362C), and bias tee must be removed.
4. Disconnect the ribbon cable (item
5. With a 5/16-inch torque wrench, disconnect the two semirigid cables (item
step attenuator, two semirigid cables (item
④
(item ) from the bias tee.
6. Disconnect the stranded control cable (item
detector (E8363C/E8364C only) and the stranded bias tee cable (item
(Release the bias tee cable such that it can be removed with the bias tee.)
7. With a T-10 TORX driver, remove the three mounting screws (item
attenuator, detector (or fixed pad), and bias tee.
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.
8. Remove the bracket from the analyzer with the attenuator, detector (or fixed pad), and bias tee attached.
Observe the
CAUTION
9. With a T-8 TORX driver, remove the mounting screws holding the bias tee and install the new bias tee
with cable.
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
7-60
"Removing the Covers" on page
①
) from the appropriate attenuator.
③
⑤
above.
7-82.
PNA Series Microwave Network Analyzers
7-6. Position the analyzer bottom side
"Raising the Receiver Deck" on page 7-8
) from the detector (or fixed pad), and two semirigid cables
) and the flexible cable (item
⑦
⑧
) from the bracket holding the
E8362C, E8363C, E8364C
if necessary.
➁
) from the appropriate
⑥
) from the appropriate
) from A16 test set motherboard.
Service Guide E8364-90038