Removing And Replacing The A36 And A37 60-Db Step Attenuators (Option Unl) - Agilent Technologies E8362A Service Manual

Repair and Replacement Procedures

Removing and Replacing the A36 and A37 60-dB Step Attenuators (Option UNL)

Removing and Replacing the A36 and A37 60-dB Step
Attenuators (Option UNL)
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 7-25
1. Disconnect the power cord.
2. Remove the outer cover. Refer to
analyzer bottom side up and raise the receiver deck as shown. Refer to
Receiver Deck" on page 7-8
3. Identify the step attenuator to be removed. To replace the attenuator, the bracket
holding the attenuator, detector (E8363A/E8364A) or fixed pad (E8362A)), 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
appropriate step attenuator, two semirigid cables (item
pad), and two semirigid cables (item
6. Disconnect the stranded control cable (item
appropriate detector (E8363A/E8364A only) and the stranded bias tee cable (item
from A16 test set motherboard. (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
holding the attenuator, detector (or fixed pad), and bias tee.
Be careful not to damage the center pins of the semirigid cables. Some flexing
CAUTION
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
9. Remove the attenuator from the bracket and install the new attenuator.
Replacement Procedure
1. Reverse the order of the removal procedure using the existing attenuator ribbon cable.
2. Perform the post-repair adjustments, verifications, and performance tests that pertain
to this removal procedure. Refer to
7-54
for this procedure.
"Removing the Covers" on page
if necessary.
①
) from the appropriate attenuator.
④
CAUTION
Table 7-2 on page
PNA Series Microwave Network Analyzers
③
) from the detector (or fixed
) from the bias tee.
⑤
) and the flexible cable (item
above.
7-70.
E8362A, E8363A, E8364A
7-6. Position the
"Raising the
②
) from the
⑥
) from the
⑧
) from the bracket
Service Guide E8364-90001
⑦
)