5. T
o reinstall, reverse the steps. Tighten the six T-10 Torx rear case screws to 0.65 N·m. Tighten the six T-8 Torx rear grill
screws to 0.45 N·m.
Remove rear chassis assembly
Use this procedure to remove and replace the rear chassis, to access rear chassis assemblies (power supply, main fan,
Carrier interface assembly, AFG Riser board).
Before you begin
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 grill and case on page 10
About this task
Steps:
About this task
Remove the rear chassis assembly from the front chassis assembly using the following steps:
Procedure
1. Use a screwdriver with a with T-10 Torx tip to remove the 19 screws securing the rear chassis to the front chassis. There
are five screws each along the top and bottom, and four screws on each side.
2. Place the instrument face down on a soft surface or fixture.
CAUTION: Place the instrument face down carefully to prevent damage to the knobs.
3. Insert a large flat blade screwdriver no more than 1/4 inch into a rectangular slot on the corner of the rear chassis (see
following image). Rotate the screwdriver to lift the corner of the rear chassis from the front chassis. Repeat on each
corner. There may be a little resistance from the front right corner of the bottom edge, where the rear chassis
interconnects to the front chassis.
4. Lift the rear chassis of
f of the front chassis.
Maintenance
6 Series B MSO MSO64B, MSO66B, MSO68B Service 11
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