Agilent Technologies 8590 L-Series Especificações Página 314

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314 Chapter7
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 A7 Analog
Interface Assembly.” removal procedure.
9. Note how the cables attached to the A9 Third Converter assembly
are dressed. (This information will be used later during the “A3
Front-End Assembly. replacement procedure.
NOTE Some card-cage options have a different cable dress which include the
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 Figure 7-8.
11.If the instrument came equipped with a tracking generator
(Option 010), disconnect W39 from A10J1 and W38 from A10J2.
12.If the instrument came equipped with an LO Output on the rear
panel (Option 009), disconnect W42 (3) from the LO OUTPUT
connector on the rear-frame assembly.
13.Remove the three screws and two washers (4) from the
front-end-to-IF support bracket, then remove the bracket.
14.Tuck the cables and wire harness that are attached to the front-end
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.
15.Carefully lift the A3 Front-End assembly out of the instrument.
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