14-4
Service Guide
Assembly Replacement and Post-Repair Procedures
HP 8719ET/20ET/22ET
Assembly Replacement Sequence
HP 8719ES/20ES/22ES
RF Network Analyzers
Procedures in This Chapter
The following sections describe the assembly replacement procedures for the
HP 8719ET/ES, HP 8720ET/ES, and HP 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
.