Agilent Technologies 8590 Series Service Manual page 314

Replacing Major Assemblies
A3 Front-End Assembly
7. Place the instrument on the work surface with the top side facing up.
8. Remove the A7 Analog Interface assembly. Refer to the
9. Note how the cables attached to the A9 Third Converter assembly
Some card-cage options have a different cable dress which include the
NOTE
use of tie-wraps. The tie-wraps are required to hold the wires in place
during installation of the instrument cover.
10.Disconnect W8 (1) from A9J5 and W9 (2) from A9J4. See
11.If the instrument came equipped with a tracking generator
12.If the instrument came equipped with an LO Output on the rear
13.Remove the three screws and two washers (4) from the
14.Tuck the cables and wire harness that are attached to the front-end
15.Carefully lift the A3 Front-End assembly out of the instrument.
314
Interface Assembly."
are dressed. (This information will be used later during the
Front-End Assembly."
(Option 010), disconnect W39 from A10J1 and W38 from A10J2.
panel (Option 009), disconnect W42 (3) from the LO OUTPUT
connector on the rear-frame assembly.
front-end-to-IF support bracket, then remove the bracket.
assembly down into the space (5) between the "D" bracket and the
A3A9 filter. This reduces the possibility that wires will be damaged
while the front-end assembly is removed.
removal procedure.
replacement procedure.
"A7 Analog
"A3
Figure 7-8.
Chapter 7