Rear-Frame Assembly - Agilent Technologies 8590 Series Service Manual

Replacing Major Assemblies

Rear-Frame Assembly

Rear-Frame Assembly
This procedure applies to:
Use ESD precautions when performing this replacement procedure.
CAUTION
Removal
1. Remove the instrument cover assembly. Refer to the
2. Place the analyzer with the top side facing up.
3. Remove the six screws (three on each side) that secure the rear
4. Remove the W6 jumper from the 10 MHz REF OUTPUT and the
5. Pull the rear frame straight back away from the main chassis.
Different models and option mixes will cause the configuration of the
NOTE
cables and wires to the rear frame to vary widely. Therefore, you will
need to note these connections for reference during reassembly. See
Figure
6. Disconnect the fan assembly from J19 on the A15 IF Motherboard
7. Disconnect the wires and cables from the rear-frame assembly.
Replacement
1. Connect the wires and cables to the rear-frame assembly as noted
2. Connect the fan assembly to J19 on the A15 IF Motherboard
Wiring can be pinched between the rear frame and the edge of the A15
CAUTION
motherboard. Make sure that all wiring is routed to one side of the
SMB connector, A15J18, and through the notch located on the rear edge
of the motherboard.
346
8590 E-Series and L-Series spectrum analyzers
8591C cable TV analyzers
8594Q QAM analyzers
Cover." removal procedure.
frame to the main chassis.
EXT REF IN connectors.
7-19.
assembly.
during the removal procedure. See
assembly.
"Instrument
Figure 7-18.
Chapter 7