14-30
Service Guide
Assembly Replacement and Post-Repair Procedures
HP 8719ET/20ET/22ET
Removing the A62, A63 Test Port Couplers and LED Board Assemblies
HP 8719ES/20ES/22ES
RF Network Analyzers
Removing the A62, A63 Test Port Couplers and LED Board
Assemblies
Tools Required
• T-10 TORX screwdriver
• T-15 TORX screwdriver
• small slot screwdriver
• ESD (electrostatic discharge) grounding wrist strap
• 5/16-inch open-end torque wrench (set to 10 in-lb)
Removal
1. Remove the bottom cover, refer to
“Removing the Covers” on page 14-6
.
2. Remove the front panel, refer to
“Removing the Front Panel Assembly” on page 14-8
.
3. Reaching the connections from the bottom of the analyzer, disconnect the 4 RF cables
attached to the couplers: 2 from the back of the couplers and 2 from between the
couplers.
4. Remove the 6 screws (item 1) from the bottom edge of the front panel frame.
5. Remove the screw (item 2) from the right side of the coupler bracket.
6. Remove the coupler nuts (item 3).
LED Board Removal
7. Remove the 3 screws (item 4) that attach the LED board to the coupler bracket.
Replacement
1. Reverse the order of the procedure.
NOTE
When reconnecting semirigid cables, torque the connections to 10 in-lb.
