344 Chapter7
Replacing Major Assemblies
B1 Fan
B1 Fan
This procedure applies to:
8590 E-Series and L-Series spectrum analyzers
8591C cable TV analyzers
8594Q QAM analyzers
Removal
1. Disconnect the analyzer from ac power.
2. Place the instrument on the worksurface with the back end facing
out.
3. Hold the B1 Fan assembly in position and loosen the four screws (1)
that secure the fan assembly to the rear-frame assembly. See
Figure 7-18.
4. Pull the fan 2 inches away from the instrument, reach into the
opening in the rear frame, and disconnect the fan wiring from
A15J19 (2).
5. Remove the four screws, washers, and spacers from the fan (1).
6. Remove the fan grill (3).
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