A15 Motherboard And If Extrusion - Agilent Technologies 8590 Series Service Manual

Replacing Major Assemblies

A15 Motherboard and IF Extrusion

A15 Motherboard and IF Extrusion
This procedure applies to:
Use ESD precautions when performing this replacement procedure.
CAUTION
Removal of the A15 Motherboard
1. Remove the instrument cover assembly. Refer to the
2. Remove the A8 Power Supply. Refer to the
3. Remove the A7 Analog Interface assembly. Refer to the
4. Remove the rear-frame assembly. Refer to the
5. If there are card cage options installed, perform the following:
6. Remove W7, W8, W9, and W21 (1) from the A9 Third Converter. See
7. Remove the two screws (4) on the front-end-to-IF support bracket.
8. Disconnect the W19 coaxial cable (5) from the A15J18 at the rear of
9. Disconnect the B1 Fan wire harness (6) from A15J19 at the rear of
10.Remove the 40 screws (7) that secure the five IF board assemblies in
324
8590 E-Series and L-Series spectrum analyzers
8591C cable TV analyzers
8594Q QAM analyzers
Cover." removal procedure.
removal procedure.
Interface Assembly."
Assembly." removal procedure.
• Note the position of the option cards for reassembly.
• Note how the wiring and cables to each option are dressed.
• Remove all cable ties.
• Disconnect all cables and wire harnesses attached to each option.
• Remove the option assemblies from the card cage and place them
in static-safe containers.
Figure 7-12.
the instrument. See
the instrument.
the IF extrusion assembly.
removal procedure.
Figure 7-13.
"Instrument
"A8 Power Supply."
"A7 Analog
"Rear-Frame
Chapter 7