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Assembly Replacement
A4 Power Supply
3. Disconnect A4W1 from the motherboard (A14).
4. Carefully peel off the side trim (item 3) from the left side of the front panel assembly (item 4).
5. Remove the two screws (item 5) that attach the power supply shield (item 2) to the front panel assembly.
6. Remove the five screws (item 6) that attach the power supply shield to the instrument chassis (item 7).
7. Lift the rear of the power supply shield one-quarter inch an
d then pull it away from the instrument chassis.
NOTE: While removing the power supply shield try to limit the movement of the front panel
assembly. This will reduce the stress on W9.
8. Remove the 12 screws (item 8) that attach the power supply to the power supply shield.
9. Remove the power supply (A4) from the front end of the shield.
Replacement
1. Reverse the removal procedure and do the following:
• Torque all T-10 TORX screws to 9 in-lbs.
• Torque all T-15 TORX screws to 21 in-lbs.
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