14-4 Service Guide
Assembly Replacement and Post-Repair Procedures 8719ET/20ET/22ET
Assembly Replacement Sequence 8719ES/20ES/22ES
RF Network Analyzers
Procedures in This Chapter
The following sections describe the assembly replacement procedures for the 8719ET/ES,
8720ET/ES, and 8722ET/ES assemblies:
• Replacing the Line Fuse‚ on page 14-5
• Removing the Covers‚ on page 14-6
• Removing the Front Panel Assembly‚ on page 14-8
• Removing the Front Panel Interface and Keypad Assemblies‚ on page 14-10
• Removing the Display Lamp and Assembly‚ on page 14-12
• Removing the Rear Panel Assembly‚ on page 14-14
• Removing the Rear Panel Interface Board Assembly‚ on page 14-16
• Removing the Source Assemblies‚ on page 14-18
— M/A/D/S (A58)
— YIG 1 (A54)
— YIG 2 (A55)
— Cavity Oscillator (A57)
• Removing the A7 CPU Board Assembly‚ on page 14-20
• Removing the A7BT1 Battery‚ on page 14-22
• Removing the A15 Preregulator Assembly‚ on page 14-24
• Removing the A19 Graphics Processor Assembly‚ on page 14-26
• Removing the A3 Disk Drive Assembly‚ on page 14-28
• Removing the A62, A63 Test Port Couplers and LED Board Assemblies‚ on page 14-30
• Removing the A26 High Stability Frequency Reference (Option 1D5) Assembly‚ on
page 14-32
• Removing the B1 Fan Assembly‚ on page 14-34
NOTE After replacing the assemblies, perform the corresponding adjustment and
verification tests located in “Post-Repair Procedures” on page 14-35.
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