2. Remove the cable ties and main fan assembly from the rear chassis.
3. T
o remove the fan from the bracket, carefully pull the fan from each corner of the bracket to disconnect the elastic fan attachments .
4. To reinstall, reverse the steps. Install the fan on the bracket in the correct orientation for the fan power cable (see photo). 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 main board
The following procedure describes the removal and replacement of the main board.
Prerequisite:
• 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 the front chassis assembly.
Maintenance
4 Series MSO (MSO44, MSO46) Service 27
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