2. Disconnect the main fan cable from the I/O board.
3. Remove the main fan assembly from the rear chassis.
4. To remove the fan from the bracket, carefully pull the fan from each cornerof the bracket to disconnect the elastic fan attachments.
5. To reinstall, reverse the steps. Install the fan on the bracket in the correct orientation for the fan power cable. Use a needle nose plier
to reinstall the fan elastic attachments on each corner. Tighten the T-10 Torx screws to 0.65 N·m when reinstalling.
Remove the AC line filter
Use this procedure to remove and replace the AC line filter from the rear chassis.
Prerequisites:
• To prevent electrostatic damage to components whenever you work on the instrument, wear properly-grounded electrostatic prevention
wrist and foot straps, and work in a tested antistatic environment on an antistatic mat.
• Remove rear chassis assembly.
Steps:
1. Remove the conductive tape (253-0594-XX) from the top of the AC linefilter. Save the conductive tape for reassembly. Only reuse the
conductivetape once.
Maintenance
3 Series MDO Mixed Domain Oscilloscope Service Manual 13
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