Agilent Technologies 8590L Service Manual page 304

A high-voltage potential may remain within the A2 Display
WARNING
assembly for some time after it has been removed from the
instrument. Do not attempt to remove the post-accelerator lead
from the cathode-ray tube.
14.Disconnect W2 (9) and W3 (10) from the display.
Figure 7-3 CRT Assembly
Chapter 7
Replacing Major Assemblies
A2 Display
305