Sun Microsystems 817-4054-15, Руководство по обслуживанию

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Chapter 14 Antigravity Clutches 14-5
14.1.2 Replacing a Clutch
To replace a clutch, IB_SSCCPU/Memory board, L2 Repeater board, or IB_SCC
board clutch, follow these steps:
1. Take the system to Standby mode.
See Section 4.2, “Taking the System to Standby Mode” on page 4-2 .
2. If you are replacing an L2 Repeater board or IB_SSC board clutch, remove power
to the system by removing the four input power cables, AC0 through AC4
(
FIGURE 1-3
).
3. Make sure that the leveling feet are extended to the floor.
4. Extend and lock the system cabinet stabilizer bar.
See Section 3.1, “Sliding the System Out of the System Cabinet” on page 3-1 and
Section 3.2, “Sliding the System Into the System Cabinet” on page 3-5 .
Caution – Failure to extend and lock the stabilizer bar before you slide a system out
of the system cabinet can cause the system cabinet to tip over.
5. Slide the system out of the system cabinet until the locking latches click.
See Section 3.1, “Sliding the System Out of the System Cabinet” on page 3-1 .
6. Attach the ESD wrist strap. Place a grounded ESD mat close to the system.
See Section 2.8, “Antistatic Precautions” on page 2-6 .
7. Remove the board or assembly from the slot with the defective clutch.
See one of the following sections:
■
Section 9.2.1, “Removing a CPU/Memory Board” on page 9-4
■
Section 10.1.1, “Removing the IB_SSC Assembly” on page 10-2
■
Section 11.1.1, “Removing an L2 Repeater Board” on page 11-2
8. Remove the two screws retaining the faulty clutch. Remove the clutch.
9. Install the replacement clutch using the screws you removed. Secure it in the same
position.