268 Keysight E5071C ENA Network Analyzers
Replacement Procedure
Analog Motherboard Replacement (A50)
6-
Analog Motherboard Replacement (A50)
Tools Required
• TORX screwdriver, T10, T15, and T20
•Flat edge screwdriver
• Open-end wrench, 5/8 inch
• Open-end torque wrench, 5/16 inch or 8mm (set to 1.08 N-m / 9.5 lb-in)
(for reconnecting SMA connector)
• Torque driver set, 5/16 inch (set to 1.08 N-m / 9.5 lb-in) (for reconnecting
SMA connector)
Removal Procedure
Refer to Figure 6-37 for this procedure.
Step 1. Remove the outer cover as described in “Outer Cover Removal” on page 203.
Step 2. Remove the following assemblies.
• Front Panel Assembly (refer to “Front Panel Removal” on page 204.)
• Removable Hard Disk Assembly (refer to “Removable Hard Disk Assembly
Removal (Obsolete)” on page 205.)
• Level Vernier Module (refer to “Level Vernier Module Replacement (A3)” on
page 236.)
• Synthesizer Module (refer to “Synthesizer Module Replacement (A1)” on
page 240.)
• Receiver Module (refer to “Receiver Module Replacement for 2-Port model
(A2/A7+A9)” on page 242 or “Receiver Module Replacement for 4-Port
model (A82/A87)” on page 248.)
Step 3. Remove the two TORX T10 screws (item 3) fastening the plate and remove it.
Step 4. Disconnect the flat cables connected to the analog motherboard (item 1, 2).
Step 5. Remove the six TORX T10 screws (item 4) fastening the rear cover.
Step 6. Disconnect the cable (item 5) connected to the analog motherboard when
with option 1E5.
Step 7. Disconnect the cables (item 6, 7) connected to the analog motherboard.
Step 8. Remove the ten TORX T10 screws (item 8) fastening the analog mother board.
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