IBM TotalStorage 300 Service Manual page 88

Microprocessor 2 connector
To replace a microprocessor, perform the following steps:
Attention:
take precautions to avoid damage from static electricity. For details on handling
these devices, see "Handling electrostatic discharge-sensitive devices" on page 177.
1. Review the information in "Before you begin" on page 67 and in "Safety and
2. Power off the engine and peripheral devices and disconnect all external cables
3. Remove the fan 3 assembly by lifting the orange handle on top of the fan
4. Remove the air baffle by grasping it at the sides and lifting it out.
5. Remove the defective microprocessor by pulling upward on the microprocessor
6. Install the new microprocessor:
7. Install the air baffle. Make sure that the sides of the air baffle fit inside the
8. Install the fan 3 assembly.
9. If you have other options to install or remove, do so now; otherwise, go to
Replacing power supplies
Each IBM NAS 300 engine comes with two power supplies, which are
hot-swappable.
CAUTION:
Never remove the cover on a power supply or any part that has the following label
attached.
78
IBM NAS 300 Service Guide
When you handle Electrostatic Discharge-Sensitive devices (ESD),
environmental notices" on page 173.
and power cords; then, remove the cover (see "Removing the cover and bezel"
on page 70).
assembly and lifting out the fan assembly.
handle and lifting it out.
a. Touch the static-protective package containing the new microprocessor to
any unpainted metal surface on the engine, then remove the microprocessor
from the package.
b. Center the microprocessor over the microprocessor connector and carefully
press the microprocessor into the connector.
brackets on the engine.
"Installing the cover and bezel" on page 84.
Microprocessor 2
Microprocessor 1
VRM
VRM connector