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Maintenance
Disassembly and Reassembly
7
7-13
Fans
The Instrument has two fans for cooling. Each fan is mounted to the chassis with four
panhead screws. See Figure 7-6.
Use the following procedure to remove one or both fans.
1.
Remove the top and bottom covers from the Instrument.
2.
Remove the air filter.
3.
Remove the shield.
4.
Remove the A2 RF Output PCA.
5.
Remove the A1 Synthesizer PCA
6.
Disconnect the two, two-pin Molex connectors from the A4 Power Supply PCA by
turning the Instrument on its side to gain access. On completion return the Instrument
onto its base position.
7.
Remove the four panhead screws from each fan.
8.
Lift the fan up and away from the chassis (similar to the air filter) making sure that
the Molex connector on the cable passes through the grommet without jamming.
Cooling Fans
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Figure 7-6. Removing the Fans
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