322 Chapter7
Replacing Major Assemblies
A8 Power Supply
A8 Power Supply
This procedure applies to:
8590 E-Series and L-Series spectrum analyzers
8591C cable TV analyzers
8594Q QAM analyzers
Removal
1. Remove the instrument cover assembly. Refer to the “Instrument
Cover.” removal procedure.
2. Remove the instrument rear frame. Refer to the “Rear-Frame
Assembly.” removal procedure.
3. Remove W51 (4) from the A8 Power Supply.
4. Remove the four TORX screws and washers on the left side of the
chassis adjacent to the A8 Power Supply.
5. Grasp the power supply pull-tab (1), pull straight up, and remove
the A8 assembly from the instrument chassis. See Figure 7-11.
Replacement
1. Position the 37-pin connector (2) on the power-supply so it is able
mate with the A15 motherboard connector.
2. Lower the A8 assembly into the instrument chassis.
3. With the connectors properly aligned, push down on top of the A8
assembly close to the pull tab (3). The assembly is correctly installed
when the four mounting holes on the left side of the chassis are
aligned with the tapped holes on the A8 assembly.
4. Replace the four screws and washers on the left side of the chassis.
5. Replace the rear frame. Refer to the “Rear-Frame Assembly.”
replacement procedure.
6. Replace the instrument cover assembly. Refer to the “Instrument
Cover.” replacement procedure.
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