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Cleaning the RF
Section's Fan Filter
Replacing the RF
Section's Battery
Warning
Warning
Caution
The fan on the RF section has a air filter that should be regularly
inspected and cleaned. To clean the air filter perform the following:
1. Disconnect the ac line power from the RF section.
2. Remove the four screws securing the filter cover to the fan on the
RF section. Remove the filter.
3. Clean the filter using a mild soap and water. Dry the filter
thoroughly. If damaged, replace with a new filter (HP part number
85660-00049).
4. Replace the filter and its cover.
The RF section's Al5 controller assembly has a battery for
maintaining internal RAM memory. This memory is primarily
used for storing instrument states, error correction data, and
battery should typically last a minimum of three years. Use the
following procedure to replace the battery. Refer to the HP 8568OB
Troubleshooting and Repair Manual for the HP part number.
Battery BTl contains lithium iodide. Do not incinerate, puncture,
or attempt to recharge this battery. Dispose of discharged
battery in a safe manner.
Changing the battery BTl on the Al5 controller assembly
requires the removal of the RF section's protective bottom cover.
This should be performed only by a qualified service person.
Refer all such servicing of the instrument to qualified service
persons.
ESD (Electrostatic Discharge) can damage or destroy electronic
components. Work at a static-safe workstation when replacing the
battery.
1. Place the HP 8568B on a static-safe workstation. Refer to
"Electrostatic Discharge Information" in this chapter.
2. Disconnect the ac line power from the instrument sections. Place
the HP 8568B upside down on the work surface so that the
bottom of the RF section is facing up.
General Information l-13
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