24 IBM N etfinity EXP3 00 - Type 3531 Hardware Main tenance Man ual
There is one switch card l ocated between the two power supply /fan units at the back
of the unit. Complete the followi ng steps to remove the switch ca rd:
1. Turn off the expansion unit.
2. Locate the blue push pin Þ2Ý at the bottom of the switch card tray.
3. Pull out the blu e pu s h p in Þ2Ý.
4. Pull up on the switch-card tray handle Þ1Ý.
5. Slide the tray that contains the switch card out of the switch card bay.
Installing a switch card: Attention: Before installing a new switch card, ma ke sure
that the switch card settings are the same as the settings on the switch card being
replaced, and that the expansion unit is turned off. Refer to “Turning the expansion
unit on and off” on page 3. Failure to do so will result in loss of data.
There is one switch card located between the two power supply/fan assemblies at the
back of the unit. Complete the following steps to install the switch card:
1. Make sure the expansion unit is turned off.
2. Hold the switch card so the blue push p in Þ1Ý is at the bottom of the card and the
tray handle Þ2Ý is to the left of the card.
3. Hold the tray handle Þ2Ý up and slide the card Þ3Ýinto the bay until it stops.
4. Push the tray handle Þ2Ýall the way down; then, push in the push pin Þ1Ý.
Replacing an ESM board
To replace an ESM board CRU in the EXP300 expansion unit, follow the instructions
for removing an ESM board and installing an ESM board.
Removing an ESM board: There are two hot-swap ESM boards at the back of the
unit. You can remove the ESM board and SCSI cable without turning off power to the
EXP300. Complete the following steps to remove an EXP300 ESM board:
1. Power down the server attac hed to the ESM Board.
2. Disconnect the SCSI cable Þ1Ýfrom the ESM Board.
3. Locate the orange push pin Þ4Ý to the left of each ESM board.
4. Pull the orange push pin Þ4Ý out.