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ROC827 Instruction Manual
Issued Mar-06 Installation and Use 2-16
button, LEDs light and stay lit again for five minutes. By entering a 0
(zero) setting, the LED always stays lit.
2.6.1 Removing the CPU Module
To remove the CPU module:
Caution
Failure to exercise proper electrostatic discharge precautions (such as
wearing a grounded wrist strap) may reset the processor or damage
electronic components, resulting in interrupted operations.
When working on units located in a hazardous area (where explosive
gases may be present), make sure the area is in a non-hazardous state
before performing procedures. Performing these procedures in a
hazardous area could result in personal injury or property damage.
1. Perform the backup procedure described in “Preserving Configuration
and Log Data” in Chapter 6, Troubleshooting.
2. Remove power from the ROC827.
3. Remove the wire channel cover.
4. Unscrew the two small screws on the front of the CPU module and
remove the faceplate.
5. Place a small screwdriver under the ejector clip at the top or bottom of
the CPU module and lightly pry the CPU module out of its socket.
You may find it easiest to carefully pry on the top ejector clip a little,
then carefully pry the bottom ejector (refer toFigure2-5). You will feel
and hear the CPU as it detaches from the backplane.
6. Remove the CPU module carefully. Do not scrape either side of the
module against the ROC827. Make sure not to pull on any cables
attached to the CPU module.
2.6.2 Installing the CPU Module
To install the CPU module:
Caution
Failure to exercise proper electrostatic discharge precautions (such as
wearing a grounded wrist strap) may reset the processor or damage
electronic components, resulting in interrupted operations.
When working on units located in a hazardous area (where explosive
gases may be present), make sure the area is in a non-hazardous state
before performing procedures. Performing these procedures in a
hazardous area could result in personal injury or property damage.
1. Slide the CPU module into the slot.
2. Press the CPU firmly into the slot, ensuring the ejector clips rest on the
module rail guides. The connectors at the back of the CPU module fit
securely into the connectors on the backplane.
3. Place the CPU faceplate on the CPU.