HP 54520 Series Service Manual page 106

CAUTION
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To remove and replace the fan
To remove and replace the fan
Use the following procedure to remove and replace the fan. When necessary, refer to other
removal procedures.
Loosen the rear panel by following steps ] through 6 of the rear panel procedure.
For reassembly, note orientation of the fan cable.
Remove the fan by removing the four screws securing it and the fan guard to the
rear panel.
When replacing the fan, be sure air flow at the fan is from outside into the instrument.
Check the flow arrows on the fan and check for proper flow once power is applied to the
instrument. Improper air flow can cause overheating of parts of the instrument.
To install the fan, reverse this procedure.
To remove and replace rear panel cables
Rear panel cables are connected to the main assembly at the rear of the instrument.
Loosen the rear panel by following steps 1 through 6 of the rear panel procedure.
Disconnect the desired cable from the main assembly.
Remove the desired cable from the rear panel.
To reassemble the instrument, reverse the procedure.
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