14-24
Service Guide
Assembly Replacement and Post-Repair Procedures
HP 8719ET/20ET/22ET
Removing the A15 Preregulator Assembly
HP 8719ES/20ES/22ES
RF Network Analyzers
Removing the A15 Preregulator Assembly
Tools Required
• T-10 TORX screwdriver
• T-15 TORX screwdriver
• ESD (electrostatic discharge) grounding wrist strap
Removal
1. Remove the rear panel, refer to
“Removing the Rear Panel Assembly” on page 14-14
.
2. Disconnect the wire bundles (item 1) (item 2) from the analyzer.
3. Remove the preregulator (A15) from the frame.
Replacement
1. Reverse the order of the removal procedure.
NOTE
• When reinstalling the preregulator (A15), make sure the 3 grommets
on the wiring bundles are seated in the slots on the back side of the
preregulator and also in the slot in the card cage wall.
•After reinstalling the preregulator (A15), be sure to set the line voltage
selector to the appropriate setting, 115 V or 230 V.
