How To Clean The Fan Filter - HP 8360 L Series User Manual

How to Clean the Fan
Filter
Note
The cooling fan located on the rear panel has a thin foam filter.
How often the filter must be cleaned depends on the environment
in which the swept CW generator operates. As the filter collects
dust, the fan speed increases to maintain airflow (as the fan speed
increases, so does the fan noise). If the filter continues to collect
dust after the fan reaches maximum speed, airflow is reduced and
the swept CW generator's internal temperature increases. If the
internal temperature reaches 90 "C the swept CW generator will
automatically turn off and the amber STANDBY LED will turn on.
Clean the fan filter as follows:
1. Turn off the swept CW generator.
2. Remove the ac line cord.
The detachable power cord is the instrument disconnecting device.
It disconnects the mains circuits from the mains supply before other
parts of the instrument. The front panel switch is only a standby
switch and is not a LINE switch.
3. Remove the screws holding the fan cage. See Figure 4-2.
4. Remove the fan cage from the rear panel.
5. Rinse the fan cage, filter, and the filter retainer in warm water,
then dry.
6. Reverse the removal procedure to reassemble the swept CW
generator.
Figure 4-2. Removing the Fan Filter
Operator's Check/Routine Maintenance 4-5